SEC Form 20-F filed by Silicon Motion Technology Corporation

TABLE OF CONTENTS

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EXPLANATORY NOTE

Unless otherwise indicated, references in this annual report on Form 20-F (this “annual report”) to:

“Silicon Motion” and its logo (a three-dimensional cube depiction of the letters “SM”), “NANDSustain,” “NANDXtend,” “SSDLifeGuard,” “SSDLifeSaver,” “TurboMLC,” “FerriSSD,” “Ferri-eMMC,” “Ferri-UFS,” the powered by SiliconMotion logo, “InstantView,” “MonTitan,” the MonTitan logo, the Shannon Systems logo, “PCIe-RAID,” “DIRECT-IO,” “Hyper-IO,” “Bigtera,” the Bigtera logo, “VirtualStor,” “CloudStor,” and “StorVisor” are our trademarks or registered trademarks. We may also refer to trademarks of other corporations and organizations in this annual report.

Unless otherwise indicated, our financial information presented in this annual report has been prepared in accordance with U.S. GAAP.

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SPECIAL NOTE REGARDING FORWARD-LOOKING STATEMENTS

This annual report contains forward-looking statements within the meaning of Section 27A of the Securities Act of 1933, as amended (the “Securities Act”), and Section 21E of the Securities Exchange Act of 1934, as amended (the “Exchange Act”), which are subject to the “safe harbor” created by those sections. These forward-looking statements include statements regarding our financial position; our expectations concerning future operations, margins, profitability, liquidity and capital resources; our business strategy and other plans and objectives for future operations; the outcome of arbitration related to the Transaction (as defined under Item 4, “Information on the Company”); and all other statements that are not historical facts. In some cases, you can identify forward-looking statements by terminology such as “may,” “will,” “should,” “expects,” “intends,” “plans,” “anticipates,” “believes,” “thinks,” “estimates,” “seeks,” “predicts,” “potential,” and similar expressions. Although we believe that these statements are based on reasonable assumptions, they are subject to numerous factors, risks and uncertainties, including, but are not limited to, those identified under “Risk Factors” and elsewhere in this annual report that could cause actual results and performance to be materially different from those described or implied in these forward-looking statements. Given these factors, risks and uncertainties, you should not place undue reliance on these forward-looking statements. Also, these forward-looking statements represent our estimates and assumptions only as of the date of this annual report. Except as required by law, we assume no obligation to update these forward-looking statements, even if new information becomes available in the future.

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PART I

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Our business, operations and financial results are subject to various risks and uncertainties, including those described below, that could adversely affect our business, financial condition, results of operations and cash flows and lead to a decline in the trading price of our ADSs. You should carefully consider the risks described below before making an investment decision. The risks described below do not identify all risks that we face. Our operations could also be affected by factors that are not presently known to us or that we currently consider to be immaterial to our operations. Due to risks and uncertainties, known and unknown, our past financial results may not be a reliable indicator of future performance and historical trends should not be used to anticipate results or trends in future periods. You should also refer to the other information set forth in this annual report, including in our consolidated financial statements.

Summary of Risk Factors

Below is a summary of the principal risks we face, followed by a more detailed description of the risk factors being set forth in summary fashion.

Risks Related to our Business

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Risks Relating to Our Corporate Structure and Governance

Risks Related to the ADSs

Risks Related to our Business

Our results of operations are subject to substantial quarterly and annual fluctuations due to a number of factors that could adversely affect our business and the price of our ADSs.

Our operating results have fluctuated in the past and are likely to fluctuate in the future. These fluctuations may occur on a quarterly and on an annual basis and are due to a number of factors, many of which are beyond our control, including, but not limited to:

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These and other factors make it difficult for us to forecast and could materially adversely affect our quarterly or annual operating results. We could fail to achieve the operating targets that we have announced, such as revenue growth, gross margin, and operating margin. In addition, our operating results in the future may be below the expectations of securities analysts or investors, which would likely cause the market price of our ADSs to decline. Any variations in our period-to-period performance may also cause the market price of our ADSs to decline. Accordingly, you should not rely on the results of any prior periods as a reliable indicator of our future operating performance.

We are subject to the cyclical nature of the semiconductor industry, which has been subject to significant fluctuations.

The semiconductor industry is highly cyclical and is characterized by constant and rapid technological change, rapid product obsolescence and price erosion, evolving standards, short product life cycles and wide fluctuations in product supply and demand. The industry has experienced significant fluctuations, often connected with, or in anticipation of, maturing product cycles and new product introductions of both semiconductor companies’ and their customers’ products and fluctuations in general economic conditions. Deteriorating general worldwide economic conditions, including reduced economic activity, concerns about credit and inflation, increased energy costs, decreased consumer confidence, reduced corporate profits, decreased spending and similar adverse business conditions, would make it very difficult for our customers, our suppliers, and us to accurately forecast and plan future business activities and could cause U.S. and foreign businesses to slow spending on our products. We cannot predict the timing, strength, or duration of any economic slowdown or economic recovery. If the economy or markets in which we operate deteriorate, our business, financial condition, and results of operations would likely be materially and adversely affected.

Downturns have been characterized by diminished product demand, production overcapacity, high inventory levels and accelerated erosion of average selling prices. Upturns have been characterized by increased product

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demand and production capacity constraints created by increased competition for access to third-party foundry, assembly and test capacity. We are dependent on the availability of such capacity to manufacture, assemble and test our products. Foundry, assembly and test capacity is currently limited due to a spike in semiconductor demand. None of our third-party foundry, assembly or test subcontractors have provided assurances that adequate capacity will be available to us.

Inflation and inflationary pressures could have an adverse effect on our business, financial condition, results of operations and cash flows.

Similar to most companies, we are exposed to risks from fluctuations in inflation. In particular, increasing or high inflation rates could adversely affect our business by increasing the cost of raw materials, energy, labor and transportation of goods. Current or future efforts by governments in locations where we operate to stimulate the economy may increase the risk of significant inflation. In the event of an increase in rates of inflation, we may seek to increase the sales prices of our solutions in order to maintain satisfactory profits. Such increases in prices may not be accepted by our customers and may not be sufficient to compensate us for the negative impact of inflation. Inflation might also reduce disposable income on a macro basis, eroding savings values, which could affect the demand for products that contain our solutions. High inflation rates may also result in unexpected and unbudgeted cost increases and may require changes to our planned investments. If we are not able to offset the effects of increased inflation, it could have a negative effect on our business, financial condition, results of operations and cash flows.

We are subject to order and shipment uncertainties and our results of operations could be materially adversely affected if we are unable to accurately forecast customer demand.

We have limited sales visibility as our customers typically do not provide us with firm, long-term purchase commitments. Additionally, our customers may also have limited sales visibility because of the rapidly changing nature of the global economy, NAND supply and demand dynamics and the markets in which devices using our products are sold.

Substantially all of our sales are made on a purchase order basis, which permits our customers to cancel, change or delay their product purchase commitments with little or no notice to us and often without penalty to them, which limits our ability to accurately forecast sales and maintain adequate inventory levels, manufacturing capacity and operating infrastructure requirements. Our customers, most of whom are NAND flash makers and module makers, face difficulties in predicting demand for their storage devices using our products, which could result in the procurement forecast provided to us changing at short notice. The majority of our customers are building storage devices such as SSDs used in personal computers (“PCs”) and other client devices and embedded MultiMediaCard (“eMMC”) and universal flash storage (“UFS”) mobile embedded storage used primarily in smartphones and other smart devices and are dependent on original equipment manufacturers (“OEMs”) of these devices accurately anticipating end-consumer demand, which has historically been difficult and subject to unpredictable deviations from past sales patterns. Also, since a significant portion of our quarterly sales, especially from module maker customers targeting channel markets, are from orders received and fulfilled in that quarter, our visibility as to expected orders from these customers in subsequent periods and for any extended period of time is limited. The multiple layers of forecasts from other customers and from their customers may introduce other errors into our estimates of anticipated sales.

To ensure the availability of our products for our customers, we generally instruct our foundries to begin manufacturing our products based on forecasts provided by these customers in advance of receiving purchase orders. However, these forecasts do not represent binding purchase commitments, and sales of our products are only recognized when they are shipped with ownership transferred to the customer. As a result, we incur inventory and manufacturing costs in advance of anticipated revenue. Because demand for our products may not materialize, manufacturing based on forecasts subjects us to risks of high inventory carrying costs and increased obsolescence and may increase our costs. If we overestimate customer demand for our products or if purchase

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orders are cancelled or shipments delayed, we may end up with excess or obsolete inventory, which could have a material and adverse effect on our financial results. The risk of obsolescence and/or excess inventory is heightened for devices designed for consumer electronics due to short product lifecycles for these types of products. Conversely, if we underestimate demand or if insufficient manufacturing capacity is available, we may not have sufficient product inventory, which could lead to missed revenue opportunities, loss of market share, damages to our customer relationships and other harm to our business. In addition, any future significant cancellations or deferrals of product orders or the return of previously sold products could materially and adversely affect our profit margins, increase product obsolescence and restrict our ability to fund our operations.

Because many of our expenses are fixed in the short term or are incurred in advance of anticipated sales, we may not be able to decrease our expenses in a timely manner to offset any shortfall of sales, or expand our R&D and other operating infrastructure in a timely manner to capture anticipated business opportunities. If we expand our business operations and demand for our products does not increase as we may have projected, our operating results could be affected by our higher operating expense levels. Conversely, if we maintain or reduce our business operations and related expenses in accordance with our projections and demand for our products increases more than expected, our operating results could be affected by lost business opportunities, less competitive economies of scale, and damaged relationships with our customers.

The demand for our products depends in part on the market conditions in the industries into which they are sold. Fluctuations in demand for our products or a market decline in any of these industries could have a material adverse effect on our results of operations.

Industry-wide fluctuations in the PC and smartphone markets could have a material adverse effect on our operating results. A large portion of our controller sales are for the PC and smartphone markets, both of which are mature and have experienced flat-to-declining sales trends because of market saturation and longer replacement cycles.

We have benefitted and should continue to benefit from technological changes in PCs and other client devices and in smartphones and tablets, such as the replacement of hard disk drives (“HDDs”) with SSDs in PCs and other client devices and the replacement of eMMC with UFS mobile embedded storage in smartphones and tablets. When a significant majority of PCs and client devices have adopted SSDs and smartphones and tablets have adopted UFS, we expect growth in demand for controllers for client SSDs and UFS will decelerate and eventually stop. Smartphones and tablets have in recent years cannibalized the sale of PCs and it is possible smartphones and tablets could be replaced by other types of mobile computing and communications devices, and these changes could also lead to unfavorable demand for our products.

The market for storage devices using NAND flash components has experienced rapid technological changes, could be subject to industry consolidation and could face competition from new technologies. NAND flash technology will continue to evolve rapidly with continued cost reductions, which could lead to new types of solid state storage devices, new applications and new categories of customers and market segments where we could be comparatively disadvantaged. The market for solid state storage devices is relatively fragmented with many suppliers that include NAND flash makers, module makers and OEMs, and if the market were to consolidate, a trend experienced by other parts of the semiconductor and storage industries, we could face changing demand for our products, replacement of our products by those of our competitors or internal captive sources and reduced market opportunities. If solid state storage devices were to use other types of non-volatile memory technologies other than NAND flash and we do not have relevant and competitive controller technology, our addressable market for controllers could shrink.

The market for controllers is composed of the merchant market and captive market. We are an independent merchant supplier of controllers to NAND flash maker, module maker and OEM customers. All of the major NAND flash makers also have internal captive sources of controllers. The merchant market for controllers could shrink if the NAND flash makers were to expand their usage of captive sources of controllers. In the past, our operating results were negatively affected when NAND flash customers chose to insource controllers.

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We may pursue acquisitions, investments and dispositions, which could adversely affect our results of operations.

Our growth strategy includes the acquisition of, and investment in, businesses that offer complementary products, services and technologies, augment our market coverage, or enhance our technological capabilities. Our investments include Kinara (previously known as Deep Vision, Inc.) in 2018, 2020 and 2021 and BIWIN Storage Technology Corp. (referred to herein as “BIWIN”) in 2021. We may not be able to identify suitable acquisition or investment opportunities, or to consummate any such transactions. In addition, our original estimates and assumptions used in assessing any transaction may be inaccurate and we may not realize the expected financial or strategic benefits of any such transaction.

Any acquisition we may undertake involves risks and uncertainties, such as unexpected delays, challenges and related expenses, and the associated diversion of management’s attention. We may become subject to legal proceedings relating to the acquisition and the integration of acquired businesses may not be successful. The integration of an acquired business involves significant challenges, including, among others: potential disruption of our business, diversion of management’s attention from daily operations and the pursuit of other opportunities, incurring significant restructuring charges and amortization expense, assuming liabilities and ongoing lawsuits, potential impairment of acquired goodwill and other intangible assets, increasing our expenses and working capital requirements, and implementing our management information systems, operating systems and internal controls for the acquired operations. In addition, our due diligence process may fail to identify significant issues with the acquired company’s products, financial disclosures, accounting practices, legal, tax and other contingencies and compliance with local laws and regulations. These difficulties may be complicated by factors such as the size of the business or entity acquired, geographic and cultural differences, lack of experience operating in the industry or geographic markets of the acquired business, potential loss of key employees and customers, the potential for deficiencies in internal controls at the acquired or combined business, performance problems with the acquired business’ technology, exposure to unanticipated liabilities of the acquired business, insufficient revenue to offset increased expenses associated with the acquisition, adverse tax consequences and our potential inability to achieve the growth prospects or synergies expected from any such acquisition. Failure to manage and successfully integrate the acquisitions we make, or to improve sales and margins of the acquired businesses, could materially harm our business, operating results and margins.

Any future acquisitions we make may require debt or equity financing, which, in the case of debt financing, would increase our leverage and interest expenses, and in the case of equity financing, would be dilutive to our existing stockholders. Acquisitions made with cash would reduce our cash reserves.

From time to time, we may also seek to divest or wind down portions of our business, either acquired or otherwise, or we may exit investments, each of which could materially affect our cash flows and results of operations. In addition, any such disposition could result in disruptions to other parts of our business, potential loss of employees or customers, or exposure to unanticipated liabilities or ongoing obligations to us following any such disposition. For example, in connection with such disposition, we may enter into transition services agreements or agree to provide certain indemnities to the purchaser, which may result in additional expenses and may adversely affect our financial condition and results of operations.

We depend on a few large customers for a significant portion of our revenues and a loss of some of these customers would result in the loss of a significant portion of our revenues.

We derived a substantial portion of our revenue from sales to a relatively small number of customers. As a result, the loss of any significant customer could materially and adversely affect our financial condition and results of operations. Sales to our five largest customers represented approximately 65%, 67% and 61% of our net revenue in 2021, 2022 and 2023, respectively. Sales to our customers constituting more than 10% of our net revenue represented, in the aggregate, 36%, 45% and 45% of our net revenue in 2021, 2022 and 2023, respectively. Our customers constituting more than 10% of our net revenue were (i) Intel and Micron in 2021, (ii)

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Micron and SK Hynix in 2022 and (iii) Micron, SK Hynix and AFASTOR in 2023. The identities of our largest customers and their respective contributions to our net revenue have varied and will likely continue to vary from period to period.

We expect that we will continue to depend on a relatively limited number of customers for a substantial portion of our net sales and our ability to maintain good relationships with these customers will be important to the ongoing success of our business. We cannot assure you that revenues generated from these customers, individually or in the aggregate, will reach or exceed historical levels in any future period. Our failure to meet the demands of these customers could lead to cancellation or reduction of businesses from these customers. In addition, any loss, cancellation or reduction of businesses from, significant change in scheduled deliveries to, or decrease in the prices of products sold to any of these customers could significantly reduce our revenues and adversely affect our financial condition and operating results. Moreover, any difficulty in collecting outstanding amounts due from our customers particularly customers who place large orders, would harm our financial performance. In addition, if our relationships with our largest customers are disrupted for any reason, it could have a significant impact on our business.

Our international operations involve inherent risks which could result in harm to our business and materially impair our future growth, including factors such as government trade restrictions and entity list, sanctions and tariffs and quotas.

The majority of our products are marketed and sold around the world, including primarily in Taiwan, China, Singapore, and the United States, and most of our corporate operations are primarily located in Taiwan. Two outside foundries, primarily Taiwan Semiconductor Manufacturing Company (“TSMC”), and secondarily Semiconductor Manufacturing International Corporation (“SMIC”), fabricate our semiconductors. Accordingly, we are subject to the risks generally associated with global trade and doing business abroad, which include foreign laws and regulations, varying consumer preferences across geographic regions, political unrest, disruptions or delays in cross-border shipments and changes in economic conditions in countries in which our products are manufactured or where we sell products.

In addition, our results could be impacted by changes in tariffs, trade agreements, trade sanctions or other trade restrictions imposed or agreed to by governments. Trade restrictions, including withdrawal from or modification of existing trade agreements, negotiation of new trade agreements, and imposition of new (and retaliatory) tariffs against certain countries or covering certain products have the potential to adversely impact demand for our products, our costs, customers, suppliers and/or the U.S. or foreign economies or certain sectors thereof in which we compete, and impair our ability to expand our business by offering new technologies and products. It remains unclear what the U.S. federal government or foreign governments will or will not do in the future with respect to tariffs or other international trade agreements and policies. Trade restrictions, and changes in or uncertainty surrounding global trade policies, may adversely impact our competitive position, businesses, financial condition, results of operations and cash flows. See “We face substantial risks associated with doing business in Taiwan because of tense regional geopolitical risk with China” below. This includes, for example, packaging, product content, labor and international trade regulations, such as the U.S. Export Administration Regulations and sanctions against Huawei and other companies, and applicable executive orders. These laws, regulations and orders are complex, change frequently and with limited notice, have generally become more stringent over time and have intensified as U.S.-China geopolitical tensions worsen. Any changes to or the addition of companies and entities that are subject to the U.S. Export Administration Regulations and international trade regulations could have a significant impact to our revenue and growth. In addition, if our customers fail to comply with these regulations and laws, we may be required to suspend sales to these customers, which could damage our reputation and negatively impact our results of operations.

Also, disease outbreaks, including the COVID-19 pandemic, terrorist acts and political or military conflicts have increased the risks of doing business globally. These factors, among others, could affect our ability to manufacture products or procure materials, our ability to import products, our ability to ship our products

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globally, our ability to sell products in international markets and our cost of doing business. See “Our business, financial condition and results of operations could be adversely impacted by the political and economic conditions of the countries in which we conduct business and operate” below. If any of these or other factors make the conduct of business in a particular country undesirable, unprofitable or impractical, our business and financial results could be adversely affected and our prospects for growth in those markets could be materially impaired. In addition, many of our imported products are subject to duties, tariffs or quotas that affect the cost and quantity of various types of goods imported. Any country in which our products are produced, imported or sold may eliminate, adjust or impose new quotas, duties, tariffs, safeguard or protectionist measures, anti-dumping duties, cargo restrictions to prevent terrorism, restrictions on the transfer of currency, climate change legislation, product safety regulations or other charges or restrictions, any of which could have an adverse effect on our business, results of operations, financial condition and the price of our ordinary shares.

NAND industry cyclicality could adversely affect our growth and profitability.

The NAND industry is highly capital intensive and regularly experiences cycles of shortages and excess supply and related rapid increases and sharp decreases in NAND component prices. The price of solid state storage devices, such as SSDs and eMMC and UFS devices, in which NAND accounts for a significant portion of material cost, could also rise and fall with NAND component prices. Falling prices for solid state storage devices could trigger stronger market demand for these devices as well as controllers used in them, and conversely, rising prices for solid state storage devices could cause demand for these devices as well as controllers used in them to fall, which could negatively affect our sales and profitability.

Additionally, during periods of NAND shortages, our sales and profitability could be negatively affected in other ways, including, but are not limited to: (i) our module maker and OEM storage customers may not be able to procure sufficient supplies of NAND components, which could lead to reduced demand for our controllers; (ii) we may not be able to procure sufficient supplies of NAND components for our Ferri industrial SSDs, which could lead to reduced sales of our SSD solutions, and furthermore, to higher cost of procured NAND components and reduced SSD solutions profitability; and (iii) NAND manufacturers may divert NAND supply away from their own storage products that use our controllers towards other customers or products that do not use our controllers, and our sales could be reduced.

During periods of NAND excess supply when NAND prices are falling sharply, our sales and profitability could also be negatively affected, including, but are not limited to: (i) NAND manufacturers facing reduced demand for NAND components and storage devices may temporarily build NAND inventory instead of selling at lower prices, and this may cause a reduction in controller demand; (ii) module maker customers that are exposed to volatile NAND pricing conditions may temporarily become more cautious in procuring NAND components, which could lead to reduced levels of controller procurement and storage device production; (iii) OEMs may temporarily limit procurement of storage devices in expectation of procuring more at a later date and at a lower price, which could restrain storage device and associated controller procurement; and (iv) NAND vendor and module maker customers that are under margin pressure because of falling NAND prices may seek price concessions from their controller suppliers.

If we fail to accurately anticipate and respond to market trends or fail to develop and introduce new or enhanced products to address these trends on a timely basis, our ability to attract and retain customers could be impaired and our competitive position could be harmed.

Our success depends to a significant extent on the development, qualification, implementation and acceptance of new product designs and improvements that provide value to our customers. Our ability to develop, qualify and distribute, and have manufactured, new products and related technologies to meet evolving industry requirements, at prices acceptable to our customers and on a timely basis are significant factors in determining our competitiveness in our target markets. For example, for our products addressing the SSD market, we must successfully identify customer requirements and design, develop and produce products on time that

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compete effectively as to price, functionality and performance. We sell products in markets that are characterized by rapid technological change, evolving industry standards, frequent new product introductions, smaller process geometries and other factors. We cannot assure you that our efforts to execute our product roadmap will result in innovative products and technologies that provide value to our customers. If we fail to or are delayed in developing, qualifying or shipping new products or technologies that provide value to our customers and address these new trends and adjust our business accordingly, we may lose competitive positioning, which could cause us to lose market share and require us to discount the selling prices of our products. Although we make substantial investments in R&D, we cannot be certain that we will be able to develop and successfully bring to market new products and technologies on a timely basis or that they will be well-received by our customers. Moreover, our investments in new products and technologies involve certain risks and uncertainties and could disrupt our ongoing business. New investments may not generate sufficient revenue, may incur unanticipated liabilities and may divert our limited resources and distract management from our current operations. We cannot be certain that our ongoing investments in new products and technologies will be successful, will meet our expectations and will not adversely affect our reputation, financial condition and operating results.

We believe that our future success depends on our ability to develop and introduce new technologies and products for new applications to generate new sources of revenue to replace, or build upon, existing product revenue for applications that are mature or in secular decline. If we are not able to repeatedly introduce, in successive years, new products for new applications that ship in volume, our revenue will likely not grow and may decline significantly and rapidly. In the past, we were able to successfully grow our revenue by adding, over time, successive categories of new controller technologies for new applications, such as memory card and flash drive controllers for external storage, eMMC and UFS mobile embedded memory controllers for smartphones and SSD controllers for PCs and other client devices. If we are unable to successfully expand our sales of SSD controllers for data center and enterprise applications, our prospects for continued revenue growth could be adversely affected.

Our gross margin and results of operations may be adversely affected in the future by a number of factors, including decreases in average selling prices of products over time, increased raw material costs and shifts in our product mix.

Our gross margin is highly dependent on product mix, especially the mix of higher gross margin controller sales and lower gross margin SSD solutions sales. A shift in sales mix away from our higher margin products could adversely affect our gross profitability as a percentage of sales and could also adversely affect our operating profitability. The primary elements of our controller cost of sales are IC fabrication at our foundries, assembly and testing, and in contrast, the primary cost of sales of our SSD solutions, which are primarily our Ferri industrial SSDs, is NAND flash components. Our SSD solutions gross margin is lower than our controller gross margin because these products are generally less differentiated and we have limited ability to mark-up the cost of NAND flash components that we procure.

The controllers we develop and sell are used for high volume applications and their average selling prices have historically decreased over time, and we believe that it is possible they may also fall in the future. We may experience period-to-period fluctuations in future operating results if our average selling prices decline. We may be forced to reduce the average unit price of our products in response to new product introductions by our competitors, competitive pricing pressures and other factors. Also, we often provide large customers with volume-related, price-discount incentives relating to their orders of specific products; if customer procurements that benefit from these incentives scale significantly, they could lead to downward pressure on our gross margins. The mobile and computing devices markets are extremely competitive, which may result in rapidly declining average selling prices of electronic devices and components, such as those made by us, and create downward pressure on our average selling prices and operating results. To maintain acceptable operating results, we will need to develop and introduce new products and product enhancements on a timely basis and continue to reduce our costs. If we are unable to offset any reductions in our average selling prices by increasing our sales volumes or reducing corresponding production costs or if we fail to develop and introduce new products and enhancements on a timely basis, our sales and operating results will be materially and adversely affected.

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We have changed our commercial arrangement with a few of our SSD solutions customers to a NAND consignment arrangement, where our customers procure and maintain ownership of the NAND flash components used in the SSD solutions that we design and build for them, and the gross margins of these types of sales are higher than the sales of products where we are responsible for procuring NAND flash components. We cannot assure you that in the future, we can increase the proportion of SSD solutions sales using a NAND consignment arrangement and if more sales are conducted using a NAND consignment arrangement, that it would lead to improvements in our operating results.

Our SSD solutions product performance could continue to adversely affect our results of operations.

We are primarily a fabless semiconductor company focused on NAND flash controllers and the sales of these controllers account for a significant majority of our overall sales. In addition, we also sell SSD solutions, mostly Ferri industrial SSDs. We introduced our Ferri products in 2011, acquired Shannon in 2015 for US$45.6 million, and acquired Bigtera in 2017 for US$4.7 million. Both our Shannon and Bigtera acquisitions have not met financial expectations to date, have been dilutive to our gross margins, operating margins and earnings per ADS, and led to write-downs of Shannon and Bigtera goodwill and intangible assets. If we are able to expand the sales of our SSD solutions, we cannot provide assurance that expanded sales of these products will not negatively affect our gross margin and operating margin, which could negatively affect the market price of our ADSs. Furthermore, even if we are able to sell our SSD solutions to customers profitably, our return on invested capital for SSD solutions will likely be materially lower than our corporate average primarily because of lower product profitability and higher investments, mainly for working capital necessary for financing NAND and other inventory, and this could negatively affect our overall financial return and the market price of our ADSs.

Our SSD solutions are modules, software and appliances, which are different from our primary controller products, which are ICs and have different financial characteristics. Our SSD solutions gross margin is materially lower than our controller gross margin because these products are generally less differentiated and, in the case of our Ferri, where NAND flash components are the majority of their cost of sales, we have limited ability to mark-up the cost of NAND flash components that we procure. We are also subject to NAND price volatility with our Ferri; because of rapidly falling NAND prices, we wrote-down US$4.3 million of NAND components and SSDs in inventory in 2021, US$8.1 million in 2022 and US$3.9 million in 2023. We cannot assure you that in the future our results of operations will not be negatively affected by further NAND component and SSD inventory write-downs.

We rely on independent semiconductor foundries and subcontractors for the fabrication, assembly and testing of our ICs, and any limitation of their available capacity to us or failure to fulfill our orders satisfactorily could damage our relationships with our customers, decrease our sales or limit our ability to grow our business.

We do not own or operate semiconductor fabrication facilities. Instead, we rely on third parties to manufacture our semiconductors. Two outside foundries, primarily TSMC, and secondarily SMIC, fabricate our semiconductors. As a result, we face several significant risks, including wafer cost, availability of wafers and other raw materials, manufacturing capacity, quality assurance, manufacturing yields and production costs, control over delivery schedules and product quality, control of our intellectual property, labor availability or strikes and actions taken by third-party contractors that breach our agreements.

The ability of each foundry to provide us with semiconductors is limited by its available capacity and access to wafers, and the ability of each subcontractor to assemble and test our products is limited by available capacity and access to substrates and other raw materials. We do not have long-term agreements with any of these foundries and subcontractors and we place our orders based on our customers’ purchase orders and sales forecasts. However, the foundries and subcontractors can allocate capacity to the fabrication, assembly and testing of the products of their other customers and reduce deliveries to us on short notice or increase the price

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they charge us. It is possible that other foundry and subcontractor customers that are larger and better financed than we are, or have long-term agreements with these foundries and subcontractors, may induce these foundries and subcontractors to reallocate capacity to them which could impair our ability to secure manufacturing, assembly and testing capacity that we need for our products. Other factors that could materially adversely affect our business and results of operation include, but are not limited to, our foundries and subcontractors being unable to secure the necessary raw materials from their suppliers, experience power outages, lack sufficient capacity to manufacture our products or suffer other disruption or reduction in efficiency. If our foundries fail to deliver fabricated silicon wafers of satisfactory quality in the volume and at the price we require, or if our assembly and testing subcontractors fail to efficiently and accurately assemble and test our products, we will be unable to meet our customers’ demand for our products or to sell those products at an acceptable profit margin, which would have a material and adverse effect on our sales and margins and damage our customer relationships.

In addition, interruptions to the wafer manufacturing processes caused by a natural disaster or human error could result in partial or complete disruption in supply until manufacturing is re-started or we are able to shift manufacturing to another fabrication facility. It may not be possible to obtain sufficient capacity or comparable production costs at another foundry. Migrating our design methodology to a new third-party foundry could involve increased costs, resources and development time comparable to a new product development effort. Any reduction in the supply of semiconductors for our products could significantly delay our ability to ship our products and potentially have negative effects on our relationships with existing customers and our results of operations. In addition, if our subcontractors terminate their relationships with us, we would be required to qualify new subcontractors, which could take at least six months, resulting in unforeseen operating problems, and our operating results may be materially and adversely affected.

The manufacture of semiconductors is a highly complex process. Minor deviations in the manufacturing process can cause substantial decreases in yield. In some situations, such deviations may cause production to be suspended. The foundries that manufacture our semiconductors have from time to time experienced lower than anticipated manufacturing yields, including yields for our semiconductors, typically during the production of new products or architectures or during the installation and start-up and ramp-up of new process technologies or equipment. If the foundries that manufacture our semiconductors do not achieve planned yields, our product costs could increase and product availability would decrease.

After the wafer fabrication processes, our wafers are shipped to our assembly and testing subcontractors. We have a system to maximize consistent product quality, reliability and yield that involves our quality assurance team working closely with subcontractors in the various phases of the assembly and testing processes. Our supplier quality management includes procedures such as processes to pre-qualify our manufacturing suppliers and subcontractors. If our subcontractors do not achieve planned product quality, reliability and yield during the assembly and testing processes, our product cost could increase, product availability could decrease, or our customers may not accept products manufactured for them.

Failure to protect our intellectual properties or maintain the rights to certain other technologies may negatively impact our ability to compete.

We believe that the protection of our intellectual property rights and continued access to certain third-party technology are and will continue to be important to the success of our business. We rely on a combination of patent, copyright, trademark and trade secret laws and restrictions on disclosure to protect our intellectual property rights. We also enter into confidentiality or license agreements with our employees, business partners and other third parties, and have implemented procedures to control access to and distribution of our documentation and other proprietary information. Despite these efforts, we cannot assure you that these measures will provide meaningful protection of our intellectual property rights. Further, these agreements do not prevent others from independently developing technologies that are equivalent to or superior to our technology. In addition, unauthorized parties may attempt to copy or otherwise obtain and use our proprietary technology. Monitoring unauthorized use of our technology is difficult and we cannot be certain that the steps we have taken

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will prevent unauthorized use of our technology, particularly in foreign countries such as Taiwan and China where the laws may not protect our proprietary rights as fully as do the laws of the United States. In addition, if the foundries that manufacture our semiconductors lose control of our intellectual property, it could be more difficult for us to take remedial measures because our foundries are located in countries that do not have the same protection for intellectual property that is provided in the United States. Also, some of our contracts, including license agreements, are subject to termination upon certain types of change-of-control transactions.

As of March 31, 2024, we have 2,749 patents and 1,162 pending applications worldwide. We cannot be certain that patents will be issued as a result of our pending applications nor can we be certain that any issued patents would protect or benefit us or give us adequate protection from competing products. For example, issued patents may be circumvented or challenged and declared invalid or unenforceable or provide only limited protection for our technologies. We also cannot be certain that others will not design around our patented technology, independently develop our unpatented proprietary technology or develop effective competing technologies on their own.

Failure to successfully defend against intellectual property lawsuits brought against us may adversely affect our business.

Companies in and related to the semiconductor industry often aggressively protect and pursue their intellectual property rights. From time to time, we have received, and may continue to receive, notices that claim we have infringed upon, misappropriated or misused other parties’ proprietary rights. Moreover, in the past we have been involved in litigation with parties that claimed that we infringed their patents or misappropriated or misused their trade secrets. In addition, we or our customers may be sued by other parties that claim that our products have infringed their patents or misappropriated or misused their trade secrets, or that may seek to invalidate one or more of our patents. An adverse determination in any of these types of disputes could prevent us from manufacturing or selling some of our products, increase our costs of revenue and expose us to significant liability. Any of these claims may materially and adversely affect our business, financial condition and results of operations. For example, in a patent or trade secret action, a court could issue a preliminary or permanent injunction that would require us or our customer(s) to withdraw or recall certain products from the market or redesign certain products offered for sales or under development. We may also be liable for damages for past infringement and royalties for future use of certain technologies. See “Item 8. Legal Proceedings” below.

In addition, any litigation to defend ourselves against claims that we have infringed the intellectual property rights of others, could, regardless of the ultimate outcome, materially and adversely affect our operating results by requiring us to incur significant legal expenses and diverting the resources of the Company and the attention of our management team.

Because the markets in which we compete are highly competitive and many of our competitors have greater resources than we have, we cannot be certain that our products will compete favorably in the marketplace.

We face competition from a number of competitors, including Marvell and Phison, our flash memory customers and smaller merchant suppliers in China. We expect to face competition in the future from our current and potential competitors. In addition, some of our flash memory customers could develop products and technologies that replace their need for our products or otherwise reduce their demand for our products.

Some of our current and potential competitors have longer operating histories, greater name recognition, access to larger customer bases and significantly greater financial, sales and marketing, manufacturing, distribution, technical and other resources than we have. As a result, they may be able to respond more quickly to changing customer demands or to devote greater resources to the development, promotion and sales of their products than we can. Our current and potential competitors may develop and introduce new products that will be priced lower, provide superior performance or achieve greater market acceptance than our products. For our SSD solutions, if we are unable to procure sufficient supplies of NAND flash components and at terms that enable our

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products to be competitive in terms of price or develop technologically competitive products, our customers may seek to purchase SSD solutions from other suppliers.

Our products must meet exacting specifications and undetected defects and failures may occur, which may cause customers to return or stop buying our products and may expose us to product liability risk and risks of indemnification against defects in our products.

Our products are complex and may contain undetected hardware or software defects or failures, especially when first introduced or when new versions are released. These errors could cause us to incur significant re-engineering costs, divert the attention of our engineering personnel from other important product development efforts and materially affect our customer relations and business reputation. If we deliver products with errors or defects, our credibility and the market acceptance and sales of our products could be harmed. Defects could also lead to liability for defective products as a result of lawsuits against us or against our customers. We have agreed to indemnify some of our customers in some circumstances against liability from defects in our products. A successful warranty or product liability claim could require us to make significant payments.

Our intellectual property indemnification practices may adversely impact our business.

We may be required to indemnify our customers and our third-party intellectual property providers for certain costs and damages of intellectual property infringement in circumstances where our products are a factor in creating infringement exposure. In the contracts under which we sell semiconductor products, we may have agreed to indemnify our customers against losses arising out of claims of unauthorized use of intellectual property. In some of our licensing agreements, we have agreed to indemnify the licensee against losses arising out of or related to our conduct or services. We cannot assure you that claims for indemnification will not be made or that these claims would not have a material and adverse effect on our business, operating results or financial condition.

We are exposed to potential impairment on investments.

We have made investments in equity securities with an aggregate value of approximately US$17.1 million as of December 31, 2023. If the companies that we invested in are unable to execute their plans and succeed in their respective markets, we may not benefit from such investments, and we could potentially lose the amounts we invested. We evaluate our investment portfolio on a regular basis to determine if impairments have occurred. If the operations of any businesses that we have invested decline significantly, we could incur impairment charges that could have a material impact on our results of operations.

We are subject to cybersecurity risks.

We experience cyberattacks of varying degrees on our technology infrastructure and systems and, as a result, unauthorized parties have obtained in the past, and may in the future obtain, access to our computer systems and networks. The technology infrastructure and systems of our customers, suppliers, vendors and partners may also experience such attacks. Cyberattacks are external and internal threats that include, but are not limited to, malware, phishing, advanced persistent threats, denial of service attacks, malicious software downloads, insider security breaches, and hardware and software vulnerabilities. We believe cyberattack attempts are increasing not only in number also in scope and that perpetrators of cyberattacks continue to develop increasingly sophisticated systems and means to not only attack systems and damage data, but also evade detection or obscure their activities.

We have controls and policies in place, will continue to review and enhance our capabilities and upgrade our protective solutions to guard against known and emerging threats, detect malicious or unauthorized activities, and have recovery systems to minimize business disruptions. If efforts to breach our infrastructure and systems are successful or we are unable to protect against these risks, we could suffer interruptions, delays, or cessation

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of operations of our systems, and loss or misuse of proprietary or confidential information, intellectual property, or sensitive or personal information. Breaches of our infrastructure and systems could also cause our customers and other affected third parties to suffer loss or misuse of proprietary or confidential information, intellectual property, or sensitive or personal information, and could harm our relationships with customers and other third parties. As a result, we could experience additional costs, indemnification claims, litigation, and damage to our brand and reputation. All of these consequences could harm our reputation and our business and materially and adversely affect our operating results and financial condition.

We outsource selected business functions to third parties, including third parties to manufacture our semiconductors. We take steps to monitor and regulate the performance of the independent third parties to whom we delegate selected functions. Arrangements with third-party service providers may make our operations vulnerable if vendors fail to satisfy their obligations to us as a result of their performance, changes in their own operations, financial condition, or other matters outside of our control. While we evaluate the information security programs and defenses of such third parties, we cannot be certain that our evaluations will identify all or any potential information security weaknesses, or that such third parties’ information security protocols are or will be sufficient to withstand or adequately respond to a cyberattack or other information security incident. The expanding role of third-party providers may also require changes to our existing operations and the adoption of new procedures and processes for retaining and managing these providers, as well as redistributing responsibilities as needed. Effective management, development and implementation of our outsourcing strategies are important to our business and strategy. If there are delays or difficulties in enhancing business processes or our third-party providers do not perform as anticipated, we may not fully realize on a timely basis the anticipated economic and other benefits of the outsourcing projects or other relationships we enter into with key vendors, which could result in substantial costs, divert management’s attention from other strategic activities, negatively affect employee morale or create other operational or financial problems for us. Terminating, transitioning or renegotiating arrangements with key vendors or failure to renegotiate on favorable terms could result in additional costs and a risk of operational delays, potential errors and possible control issues as a result of the termination or during the transition or renegotiation phase.

The constant growth and development of technology, including the increased use of Artificial Intelligence, presents risks and challenges to our operations that could give rise to legal or regulatory action, damage our reputation or otherwise materially harm of our business.

Emerging technology is a consistent subject of new laws or regulations and evolving interpretations and applications of laws and regulations. If we fail to comply with these laws, we may be subject to penalties, fines or criminal or civil liability. The development and use of artificial intelligence (“AI”) presents new risks and challenges that can impact our operations if we incorporate AI into our operations, or if used by our third-party vendors. While we aim to develop and use AI responsibly and attempt to mitigate ethical and legal issues presented by its use, we may ultimately be unsuccessful in identifying or resolving issues before they arise. AI technologies are complex and rapidly evolving and the technologies that we develop or use may ultimately be flawed. Moreover, AI technology is subject to rapidly evolving domestic and international laws and regulations, which could impose significant costs and obligations on the Company. For example, in 2023 the Biden Administration in the United States issued a new, executive order on safe, secure and trustworthy AI. Emerging regulations may pertain to data privacy, data protection, and the ethical use of AI, as well as clarifying intellectual property considerations. Our use of AI could give rise to legal or regulatory action, increased scrutiny or liability, damage our reputation or otherwise materially harm our business. Additionally, if we fail to keep pace with rapidly evolving AI technological developments, our competitive position and business results may be negatively impacted.

Our business, financial condition and results of operations could be adversely impacted by the political and economic conditions of the countries in which we conduct business and operate.

A substantial portion of our business is conducted outside of the United States and, as a result, we are subject to foreign business, political and economic risks. Most of our ICs are manufactured, assembled and tested

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by third-parties located in China and Taiwan. We generated 94%, 86% and 91% of our revenue in 2021, 2022 and 2023, respectively, from sales to customers outside the United States, and for the year ended December 31, 2023, 67% of our revenue was from sales in three jurisdictions, China, Singapore and Taiwan. Our controller R&D is conducted primarily in Taiwan and our SSD solutions R&D is conducted in both China and Taiwan. Most of our corporate functions are located in Taiwan. These operations are directly influenced by the political and economic conditions of the country in which they are located. We do not expect the portion of our business located outside of the United States to change in the future.

Accordingly, we are subject to risks associated with international operations, including but not limited to:

As a result of having global operations, the sudden disruption of our supply chain and/or disruption of the manufacture of our customer’s products caused by events outside of our control could impact our results of operations by impairing our ability to timely and efficiently deliver our products.

Although our reporting currency is the U.S. dollar, and the majority of our sales and cost of sales in the last three years are denominated in the U.S. dollar, the majority of our operating expenses are denominated in the NT dollar, and to a lesser extent, the Chinese yuan and U.S. dollar. Any unfavorable changes in foreign exchange rates could adversely affect, or cause fluctuations in, our results of operations. We do not currently engage in currency hedging activities.

We operate primarily in regions that are susceptible to natural disasters.

We operate primarily in regions of the world, including Taiwan, China and California that are susceptible to earthquakes. In the past, these regions had experienced severe earthquakes that caused significant property damage and loss of life, although we did not suffer any material impact on our business. The occurrence of earthquakes is unpredictable, and a major earthquake and consequent disruptive events could severely disrupt the normal operations of our business and have a material and adverse effect on our financial condition and operating results.

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Increased focus by governmental and non-governmental organizations, consumers and shareholders on sustainability issues, including those related to climate change, may increase our costs and litigation risks, which may have an adverse effect on our business, financial condition and results of operations and damage our reputation.

Expectations of our Company relating to environmental, social and governance factors (“ESG”) may impose additional costs and expose us to new risks. There is an increasing focus from certain investors, consumers and other key stakeholders concerning corporate responsibility, specifically related to ESG. We expect that an increased focus on ESG considerations will affect some aspects of our operations. Stakeholder groups may find us insufficiently responsive to the implications of climate change, and therefore we may face legal action or reputational harm. We also may not achieve our stated sustainability-related goals, which could harm our reputation, or we may incur additional, unexpected costs to achieve such goals, which could materially and adversely affect our business, financial condition and results of operations.

Additionally, as climate change, land use, water use, deforestation, plastic waste, recyclability or recoverability of packaging, and other sustainability concerns become more prevalent, governmental and non-governmental organizations, consumers and investors are increasingly focusing on these issues. This increased focus on environmental issues and sustainability may result in new or increased regulations and consumer and investor demands that could cause us to incur additional costs or to make changes to our products to comply with any such regulations and address demands. If we are unable to respond or perceived to be inadequately responding to sustainability concerns, consumers may choose to purchase products from a competitor.

Concern over climate change may result in new or increased legal and regulatory requirements to reduce or mitigate the effects of climate change on the environment. For example, in 2024, the SEC issued climate disclosure rules that would require new climate related disclosure in SEC filings. Increased costs of energy or compliance with emissions standards due to increased legal or regulatory requirements may cause disruptions in or increased costs associated with manufacturing our products. Any failure to achieve our goals with respect to reducing our impact on the environment or a perception (whether or not valid) of our failure to act responsibly with respect to the environment or to effectively respond to new, or changes in, legal or regulatory requirements concerning climate change or other sustainability concerns could adversely affect our business, financial condition, results of operations and reputation.

In addition, shareholders are increasingly sensitive to the climate change impacts and mitigation efforts of companies, are increasingly seeking enhanced disclosure on the risks, challenges, governance implications and financial impacts of climate change faced by companies and are demanding that companies take a proactive approach to addressing perceived environmental risks, including risks associated with climate change, relating to their operations. Adverse publicity or climate-related litigation that may result from enhanced disclosure or shareholder perception could have a negative impact on our business, financial condition and results of operations.

We face substantial risks associated with doing business in Taiwan because of tense regional geopolitical risk with China.

Most of our business operations are in Taiwan, a self-governing democracy, with a unique international political status, that is claimed by China and receives security from the United States under the Taiwan Relations Act. China asserts that Taiwan is part of China, seeks the unification of Taiwan and has not ruled out the use of force to achieve this. China is also increasingly assertive in the region and claims sovereignty over much of the South China Sea south of Taiwan and has unilaterally established an Air Defense Identification Zone (“ADIZ”) in the East China Sea north of Taiwan. The United States does not recognize China’s ADIZ and conducts regular freedom of navigation operations in the areas claimed by China. In 2016, China dismissed the United Nation’s Permanent Court of Arbitration ruling against it in its claims to the South China Sea. Tensions between Taiwan and China and between the United States and China have increased in recent years.

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A majority of our employees and a significant portion of our R&D and corporate functions are based in Taiwan. We also operate a R&D center in Shanghai, and China is one of the largest markets for our products. In addition, all of our foundries and assembly and testing subcontractors are located in either Taiwan or China. Accordingly, our business and results of operations and the market price of our ADSs may be affected by any deterioration in the relationship between Taiwan and China. Although there are significant economic ties between Taiwan and China, in recent years China has taken a more aggressive posture towards Taiwan, including the suspension of cross-straits communications channels in 1996, regular intrusion by Chinese military aircraft into Taiwan airspace, the sailing of naval ships around Taiwan waters, the conduct of military exercises close to Taiwan, and exclusion of Taiwan from international organizations such as the World Health Organization.

Furthermore, our principal executive offices are in Hong Kong. Previous pro-democracy protests and COVID-19 containment activities have affected our Hong Kong operations and China’s national security law for Hong Kong has reduced its autonomy and could lead to further repercussions from the United States, Taiwan and other countries and may affect our operations in the future.

Past and recent developments in relations between Taiwan and China have on occasion depressed the market prices of the securities of Taiwanese companies or companies with significant business activities in Taiwan. We cannot assure you that any contentious situation between Taiwan and China will always resolve in maintaining the current status quo or remain peaceful. Relations between Taiwan and China, potential confrontations between the United States and China and other factors affecting military, political, social or economic conditions in Taiwan and Hong Kong could have a material adverse effect on our financial condition and results of operations, as well as the market price and the liquidity of our ADSs.

The enactment of legislation implementing changes in the taxation of international business activities, the adoption of other tax reform policies or changes in tax legislation or policies could materially impact our financial position and results of operations.

Legislation is introduced from time to time to reform the taxation of international business activities. The Organisation for Economic Co-operation and Development (the “OECD”) has released guidance covering various topics, including country-by-country reporting, definitional changes to permanent establishment and guidelines in determining arm’s length transfer pricing. This guidance is collectively referred to as Base Erosion and Profit Shifting (“BEPS”) an initiative that aims to standardize and modernize global tax policy. Depending on legislation ultimately enacted in connection with this guidance by jurisdictions in which we operate, there may be significant consequences for us due to our large international business activities. For example, adoption of BEPS by foreign jurisdictions in which we operate could result in changes to tax policies, including transfer-pricing policies that could ultimately impact our tax liabilities to foreign jurisdictions. If any of these proposals are enacted into law, or if other international, consensus-based tax policies and principles are amended or implemented, they could have material adverse consequences on the amount of tax we pay and thereby on our financial position and results of operations. It is likely that new legislation enacted by several governments of countries in which we operate could lead to higher operating and tax expenses for our business in the near future.

We are subject to risks associated with the development and construction of our office buildings.

In September 2018, we purchased 65,700 square feet of land in Hsinchu, Taiwan for a total cost of US$58.9 million, which is currently targeted for completion in 2024. On February 18, 2021, the Company won a bid with a third-party to build an office building in Taipei, Taiwan and executed a property development agreement in May 2021, with property development costs to be defined and agreed in a subsequent agreement. We have no experience developing and constructing office buildings and managing real property of this scale. We may encounter unanticipated occurrences or conditions during construction that may increase the expense of these projects. We may also encounter unanticipated delays in the construction of the new buildings and local government approvals for the projects may be delayed. We will also be required to comply with applicable environmental regulations in connection with such development. We are financing these construction projects

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from our cash balance, which could limit alternative deployments of capital. The purchase of the land and construction of the buildings will increase our fixed assets significantly and could reduce our return on invested capital. After the office buildings have been constructed, we may consider sale and leaseback arrangements if favorable terms can be obtained.

Risks Relating to Our Corporate Structure and Governance

The loss of any of our key personnel or the failure to attract or retain specialized technical or management personnel could impair our ability to grow our business.

We rely heavily on the services of our key employees, including Wallace C. Kou, our President and Chief Executive Officer. In addition, our engineers and other highly skilled personnel are a significant asset and are the source of our technological and product innovations. We believe our future success will depend upon our ability to attract and retain skilled managerial, engineering and sales and marketing personnel. The competition for such personnel, particularly engineering personnel, is intense in our industry. We may not be successful in attracting and retaining sufficient numbers of engineering personnel to support our anticipated growth. These personnel are required to design and develop ICs, including firmware, and to introduce product enhancements for use in future applications. Despite the incentives we provide, our current employees may not continue to work for us, and if additional personnel were required for our operations, we may not be able to obtain the services of additional personnel necessary for our growth. In addition, we do not maintain “key person” life insurance for any of our senior executives or other key employees. The loss of any of our key employees or our inability to attract or retain qualified personnel, including engineers, could delay the development and introduction of, and have an adverse effect on our ability to sell, our products as well as have an adverse effect on our overall growth. In addition, if any other members of our senior management or any of our other key personnel depart, join a competitor or form a competing company, we may not be able to replace them easily and we may lose customers, business partners, key professionals and staff members. Substantially all of our senior executives and key personnel have entered into confidentiality and non-disclosure agreements. In the event of a dispute between any of our senior executives or key personnel and our operating companies in Taiwan and other foreign countries, we cannot assure you the extent, if any, to which these provisions may be enforceable in Taiwan or other foreign countries due to the constantly evolving nature of their respective legal systems.

Any failure to achieve and maintain effective internal controls could have a material adverse effect on our business, results of operations and the market price of our ADSs.

We are subject to reporting obligations under securities laws of the United States. The SEC, as required by Section 404 of the Sarbanes-Oxley Act of 2002, adopted rules requiring every public company to include in its annual report management’s assessment of the effectiveness of the company’s internal controls over financial reporting. In addition, an independent registered public accounting firm must attest to and report on the effectiveness of the company’s internal controls over financial reporting.

Our management and independent registered public accounting firm have concluded that our internal controls over financial reporting as of December 31, 2023 are effective. However, we cannot assure you that in the future we or our independent registered public accounting firm will not identify material weakness during the audit process or for other reasons. In addition, because of the inherent limitations of internal control over financial reporting, including the possibility of collusion or improper management override of controls, material misstatements due to error or fraud may not be prevented or detected on a timely basis. As a result, if we fail to maintain effective internal controls over financial reporting or should we be unable to prevent or detect material misstatements due to error or fraud on a timely basis, investors could lose confidence in the reliability of our consolidated financial statements, which in turn could harm our business and results of operations, negatively impact the market price of our ADSs and harm our reputation.

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Our business is subject to various governmental regulations, and compliance with these regulations may cause us to incur significant expense.

We are subject to various state, federal and international laws and regulations governing the environment, including restricting the presence of certain substances in electronic products. In addition, we are also subject to various industry requirements restricting the presence of certain substances in electronic products. Although our management systems are designed to maintain compliance, we cannot assure you that we have been or will be at all times in complete compliance with such laws and regulations. If we violate or fail to comply with any of them, a range of consequences could result, including fines, import/export restrictions, sales limitations, criminal and civil liabilities or other sanctions.

Recently there has been increased focus on environmental protection and social responsibility initiatives, which are subject to change, can be unpredictable, and may be difficult for us to comply with, given the complexity of our supply chain and our significant outsourced manufacturing. We are required to implement various standards or processes due to the adoption of rules or regulations that result from these initiatives, such as the SEC rules on the disclosure of the use of “conflict minerals.” If we are unable to comply, or ensure that our suppliers or contract manufacturers comply, with such standards or processes, customers may stop purchasing from us, which could adversely affect our sales and results of operations.

Risks Related to the ADSs

Our stock price has been, and may continue to be, volatile, which could result in investors losing all or part of their investments.

Since we completed our initial public offering in June 2005, the market price of our ADSs has been and likely will continue to be highly volatile and could be subject to wide fluctuations in response to numerous factors, including but are not limited to the following:

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Many of these factors are beyond our control and may negatively impact the market price of our ADSs, regardless of our performance. In addition, the stock market in general, and the market for technology and semiconductor companies in particular, have been highly volatile. Furthermore, the trading price of our ADSs may be adversely affected by third-parties trying to drive down the market price. Short sellers and others, some of whom post anonymously on social media, may be positioned to profit if our stock declines and their activities can negatively affect our stock price. These broad market and industry factors may seriously harm the market price of our ADSs, regardless of our operating performance. Our ADSs may not trade at the same price levels as that of other semiconductor and technology companies, and shares of semiconductor and technology companies, in general, may not sustain their current market prices. These fluctuations as well as general economic, political, and market conditions may have an adverse effect on the market price of our ADSs.

There can be no assurance that we will declare cash dividends in the future in any particular amounts or at all.

Since November 2015, our board of directors has declared dividends annually, with payments made in four quarterly installments. The decision to continue declaring dividends, if any, and their timing and amount, depends on, among other things, that the dividend payment is in the best interests of our shareholders, business visibility, our results of operations, capital availability and future capital requirements, financial condition, statutory requirements, and other factors that our board of directors may deem relevant and any dividend declaration is at the discretion of our board of directors. Our dividend payments may change from time to time, and we cannot provide assurance that we will continue to declare dividends, if at all or in any particular amounts. A reduction in or elimination of our dividend payments could have a negative effect on our share price.

We are a foreign private issuer within the meaning of the rules under the Exchange Act, and as such we are exempt from certain provisions applicable to United States domestic public companies.

Because we are a foreign private issuer under the Exchange Act, we are exempt from certain provisions of the securities laws and regulations in the United States that apply to U.S. domestic issuers, including:

We will be required to file an annual report on Form 20-F within four months of the end of each fiscal year. In addition, we intend to publish our results on a quarterly basis through press releases, distributed pursuant to the rules and regulations of the Nasdaq. Press releases relating to financial results and material events will also be furnished to the SEC on Form 6-K. However, the information we are required to file with or furnish to the SEC will be less extensive and less timely than that required to be filed with the SEC by U.S. domestic issuers. As a result, you may not be afforded the same protections or information that would be made available to you were you investing in a U.S. domestic issuer.

We may lose our foreign private issuer status in the future, which could result in significant additional costs and expenses to us.

As discussed above, we are a foreign private issuer, and therefore, we are not required to comply with all of the periodic disclosure and current reporting requirements of the Exchange Act. The determination of foreign private issuer status is made annually on the last business day of an issuer’s most recently completed

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second fiscal quarter, and, accordingly, the next determination will be made with respect to us on June 28, 2024. In the future, we would lose our foreign private issuer status if (1) more than 50% of our outstanding voting securities are owned by U.S. residents and (2) a majority of our directors or executive officers are U.S. citizens or residents, or we fail to meet additional requirements necessary to avoid the loss of foreign private issuer status. If we lose our foreign private issuer status, we will be required to file with the SEC periodic reports and registration statements on U.S. domestic issuer forms, which are more detailed and extensive than the forms available to a foreign private issuer. We will also have to comply with U.S. federal proxy requirements, and our officers, directors and 10% shareholders will become subject to the short-swing profit disclosure and recovery provisions of Section 16 of the Exchange Act. In addition, we will lose our ability to rely upon exemptions from certain corporate governance requirements under the listing rules of the Nasdaq. As a U.S. listed public company that is not a foreign private issuer, we will incur significant additional legal, accounting and other expenses that we will not incur as a foreign private issuer.

If we are characterized as a passive foreign investment company, U.S. holders of our ADSs may experience adverse tax consequences.

Based on the present and projected composition of our income and valuation of our assets, we believe we are not currently classified as a passive foreign investment company (“PFIC”) for U.S. federal income tax purposes. We will generally be classified as a PFIC for any taxable year in which either (a) at least 75% of our gross income is passive income or (b) at least 50% of the value (determined on the basis of a quarterly average) of our assets is attributable to assets that produce or are held for the production of passive income. If we are characterized as a PFIC, U.S. holders of our ADSs may experience adverse tax consequences. See “ITEM 10. Additional Information — Taxation — United States Federal Income Taxation.”

Introduction

Silicon Motion was originally incorporated as a corporation under the name Silicon Motion Technology Corporation in the Cayman Islands in January 2005 and acquired Silicon Motion, Inc., a Taiwan corporation (“SMI Taiwan”), in April 2005. Originally SMI Taiwan was known as Feiya Technology Corporation (“Feiya”), a Taiwan corporation, which was incorporated in April 1997 and had changed its name to SMI Taiwan after acquiring, in August 2002, Silicon Motion, Inc., a California corporation (“SMI USA”), which was incorporated in November 1995. Feiya was originally a flash memory products company and SMI USA was a graphics processor company. The name and address of the Company’s agent for service of process in the United States is PTSGE Corp. at 924 Fourth Avenue, Suite 2900, Seattle, WA 98104.

We are a global leader in developing NAND flash controllers for SSDs and other solid state storage devices. We have over 20 years of experience developing specialized processor ICs that manage NAND components and deliver market leading, high-performance storage solutions widely used in enterprise and hyperscale data centers, PCs, smartphones and commercial and industrial applications. We have one of the broadest portfolios of controller intellectual properties developed from our deep understanding of NAND characteristics, which enables us to design both unique, highly optimized configurable IC plus related firmware controller platforms and complete turnkey controller solutions. In the last ten years, we have shipped over six billion NAND flash controllers. More NAND flash components, including current and up-coming generations of flash produced by Kioxia, Micron, Samsung, SK Hynix and its subsidiary Solidigm, Western Digital and YMTC, are supported by Silicon Motion controllers than any other company. Our customers include NAND flash makers, module makers, hyperscalers and OEMs.

We are a leading supplier of SSD controllers used in PCs and other client devices and leading merchant supplier of eMMC/UFS controllers used in smartphones and Internet of things (“IoT”) devices. We also leverage our controller expertise to supply specialized small single-chip form factor SSDs for industrial, commercial and automotive applications. We market our controllers under the “SMI” brand and single-chip SSDs under the “FerriSSD,” “Ferri-eMMC,” and “Ferri-UFS” brands.

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Our principal executive offices are located at Flat C, 19/F, Wing Cheong Commercial Building, Nos 19-25 Jervois Street, Hong Kong. The address of our United States operating subsidiary, SMI USA, is 690 N. McCarthy Blvd. Suite 200, Milpitas, CA 95035. The address of our Taiwan operating subsidiary, SMI Taiwan, is 8/F, #36 Taiyuan St., Jhubei, Hsinchu 30265, Taiwan. Our ADSs, each representing four of our ordinary shares, have been listed and traded on Nasdaq since June 2005. Our website address is www.siliconmotion.com. The information on our website should not be deemed to be part of this annual report. Additionally, the SEC maintains a website at www.sec.gov that contains reports, proxy and information statements, and other information regarding registrants that make electronic filings with the SEC using its EDGAR system.

Please refer to “Operating and Financial Review and Prospects — Liquidity and Capital Resources” in Item 5 below for a discussion of our capital expenditures in the past three years.

Termination of the Merger Agreement with MaxLinear

On May 5, 2022, the Company entered into an Agreement and Plan of Merger (the “Merger Agreement”) with MaxLinear, Inc., a Delaware Corporation (“MaxLinear”), and Shark Merger Sub, an exempted company with limited liability incorporated under the law of the Cayman Islands and a wholly owned subsidiary of MaxLinear, pursuant to which the Company agreed to be acquired by MaxLinear, with (a) holders of our ordinary shares to receive US$23.385 in cash and 0.097 shares of MaxLinear common stock, US$0.0001 par value per share (“MaxLinear Common Stock”), for each share that they hold (other than certain customary excluded shares), and (b) ADS holders to receive US$93.54 in cash and 0.388 shares of MaxLinear Common Stock for each ADS that they “hold (other than ADSs representing certain customary excluded shares), in each case, with cash in lieu of any fractional shares of MaxLinear Common Stock (collectively, the “Transaction”). On August 31, 2022, shareholders at the Company’s Extraordinary General Meeting of Shareholders approved the Transaction.

On July 26, 2023, the Company and MaxLinear received antitrust approval from the State Administration for Market Regulation of the People’s Republic of China (“SAMR Approval”). Shortly after receiving SAMR Approval, the Company received notice from MaxLinear of its purported termination of the Merger Agreement. MaxLinear did not provide any factual basis for its purported termination, and the Company believes its actions constituted a willful and material breach of the Merger Agreement. The Company has filed a claim in the Singapore International Arbitration Centre (the “SIAC”), which is the venue for dispute resolution under the Merger Agreement, and is currently pursuing payment of the termination fee of US$160 million, together with further substantial damages, interest and costs. Under the SIAC Arbitration Rules, all matters relating to the proceedings are confidential.

Significant Subsidiaries of the Company

Below is a list of significant subsidiaries of the Company. All subsidiaries are wholly owned.

Our Market and Products

We focus primarily on designing, developing and marketing: (i) NAND flash controllers for solid state storage devices, primarily SSDs used in PCs and other client devices and eMMC and UFS mobile embedded storage used in smartphones and IoT devices and (ii) SSD solutions, primarily small form-factor specialized SSDs used in industrial, commercial and automotive applications. In 2021, 55% to 60% of our net sales were of SSD controllers, 30% to 35% were eMMC and UFS controllers and 5% to 10% were SSD solutions. In 2022, 45% to 50% of our net sales were of SSD controllers, 35% to 40% were eMMC and UFS controllers and 5% to 10% were SSD solutions. In 2023, 55% to 60% of our net sales were of SSD controllers, 25% to 30% were eMMC and UFS controllers and 5% to 10% were SSD solutions.

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NAND Flash Controllers

We offer a broad range of controllers for developing different categories of solid state storage devices that are used in a wide variety of applications. We provide controllers for computing-grade SSDs used in PCs and other client devices, enterprise-grade SSDs used in data centers, eMMC and UFS mobile embedded storage used in smartphones and IoT devices, enterprise-grade SSDs used in enterprise and hyperscale data centers, flash memory cards and flash drives used as expandable storage and specialized SSDs used in industrial, commercial and automotive applications. For most of these applications, we offer customers controllers, which are designed for a range of different price-performance trade-offs that enable the targeting of different market segments, such as value-line, mainstream and premium. Our controllers are a combination of ICs and firmware and are offered as configurable platforms or turnkey solutions, which provide customers with options to customize products to achieve desired differentiation or focus on fast time-to-market. Since SSDs and mobile embedded storage products are defined by continuously evolving industry standards such those relating to, but are not limited to, the PCIe host interface, NVMe data transfer protocol and UFS storage specification, we provide controllers for the latest versions of these industry standards and design our solutions for customers to build storage devices with competitive product performance and compatibility with host devices. Our controllers are also designed to support the majority of the latest and next generations of NAND flash components manufactured by vendors such as Kioxia, Micron, Samsung, SK Hynix and its subsidiary Solidigm, Western Digital and YMTC, which enables customers to have wide choices of components for developing and building storage devices. Controllers integrate technologies that are critical to their functionality and these include advanced error correction codes (“ECC”) and digital signal processing (“DSP”) engines for ensuring data reliability and sophisticated wear-leveling algorithms for maximizing the usable life of NAND flash components. We may also incorporate other technologies in our controllers such as encryption, power-loss protection, multimedia digital rights management and active temperature monitoring.

SSD Solutions

We use our unique controller technology to develop Ferri SSD solutions. Our FerriSSDs, Ferri-eMMCs, and Ferri-UFS products are highly reliable industrial-, commercial- and automotive-grade single-chip SSDs, which are developed for a wide-range of embedded applications that require high data rate, small form factor and compliance with industry standards. We offer customers firmware customization for performance tuning as a value-added service.

Our Customers

We sell our products to NAND flash makers, module makers, hyperscalers and OEMs worldwide. Most of our high — performance flash memory storage controllers are supplied to NAND flash manufacturers. We are a leading supplier of SSD controllers used in PCs, data centers, automotive and other client devices and a leading merchant supplier of eMMC and UFS controllers used in smartphones and IoT devices. Sales to our five largest customers represented approximately 65%, 67% and 61% of our net revenue in 2021, 2022 and 2023, respectively. Sales to our customers constituting more than 10% of our net revenue represented, in the aggregate, 36%, 45% and 45% of our net revenue in 2021, 2022 and 2023, respectively. Our customers constituting more than 10% of our net revenue were (i) Intel and Micron in 2021, (ii) Micron and SK Hynix in 2022 and (iii) Micron, SK Hynix and AFASTOR in 2023. The identities of our largest customers and their respective contributions to our net revenue have varied and will likely continue to vary from period to period

The majority of our customers purchase our products through purchase orders, as opposed to entering into long-term contracts with us. The price for our products is typically agreed upon at the time a purchase order is placed.

Sales and Marketing

We market and sell our products worldwide through a combination of direct sales personnel and independent electronics distributors. Our direct sales personnel are strategically located near our NAND flash

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manufacturer, leading technology OEM and modular maker customers in Taiwan, Korea, China, the United States, and Japan. Approximately 67% of our sales in 2021, 79% of our sales in 2022, and 65% of our sales in 2023 were attributable to our direct sales force while the remainder was attributable to distributors.

To supplement our direct sales, we have independent electronics distributors and sales reps located throughout the world. We selected these distributors and reps based on their ability to provide effective field sales, marketing communications and technical support for our products to our customers.

Our marketing group focuses on our product strategy, product development road maps, new product introduction process, demand assessment, competitive analysis and product marketing. We seek to work with potential and existing customers early in their design process to best match our products to their needs, and more broadly, to ensure that product development activities, product launches, and on-going demand and supply planning occur in a well-managed, timely basis in coordination with our R&D, operations, and sales groups, as well as our customers and distributors. We also attend industry tradeshows and technical conferences to promote our products and solutions, maintain close contact with our existing customers to assess demand, and keep current with industry trends. Our participation in industry standards associations, such as IEEE, JEDEC, NVM Express, and Open Compute Project (OCP) helps us monitor the latest industry developments and promote our corporate profile. Our marketing group also works with our sales teams to identify new business opportunities.

We also have field application engineers (“FAEs”), who provide technical support and assistance to existing and potential customers in designing, testing and qualifying systems that incorporate our products. Our FAE organization is segmented by product and market to support our customers.

Research and Development

Our future success depends on our ability to introduce improvements to our existing products and to develop new products that deliver cost-effective solutions for both existing and new markets. Our R&D efforts are directed largely to both the development of algorithms and other technological building blocks necessary for managing NAND flash and the use of these technological building blocks to develop a wide variety of NAND flash controller solutions, which are ICs with embedded firmware, that can manage most available NAND flash components and are used to create different classes of solid state storage devices, such as enterprise-grade SSDs used in enterprise applications and data centers, client SSDs used in PCs and other client devices, eMMC and UFS embedded storage for smartphones and IoT devices. We have assembled a core team of engineers who have experience in the areas of firmware, digital and mixed-signal IC design and system-level architecture. Our R&D expenses consist primarily of employee salaries and related benefits including stock-based compensation, tape-out and related project expenses and intellectual property and software licensing costs. We expense R&D expenditures as they are incurred.

Our primary R&D centers are located in Hsinchu and Taipei, Taiwan, and Shanghai, China. Our facilities in Hsinchu and Taipei focus primarily on our NAND flash controller products, and our facilities in Shanghai focus primarily on specific product requirements of our customers in China.

Our R&D activities broaden and strengthen our portfolio of intellectual properties, including patents and trade secrets. As of March 31, 2024, we have 2,749 patents and 1,162 pending applications worldwide, and we will continue to actively pursue the filing of additional patent applications in important jurisdictions.

Our R&D expenses were approximately US$164.3 million, US$188.5 million, and US$174.4 million for the years ended December 31, 2021, 2022 and 2023, respectively.

Manufacturing

We design and develop our products and electronically transfer our proprietary designs to independent foundries for the manufacturing and processing of silicon wafers. Once the wafers are manufactured, they are

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then shipped to third-party assembly and testing subcontractors. Individual IC dies are diced from wafers, assembled into finished chips and undergo several stages of testing before delivery to our customers. For certain products, we also ship bare dies to our customers. We believe that our strategy of outsourcing wafer fabrication, packaging and testing enables us to benefit from the R&D efforts of leading manufacturers without having to commit our own substantial capital investments. Our fabless business model also provides us with the flexibility to engage vendors who offer services that best complement our products and technologies.

Wafer fabrication. TSMC and SMIC are currently our primary foundries that manufacture most of our semiconductors. We use their fabs in Taiwan and China to fabricate our devices using CMOS process technology, primarily with process nodes from 6 to 55 nanometers. We regularly evaluate the benefits and feasibility, on a product-by-product basis, of migrating to more cost-efficient manufacturing process technologies.

Assembly and testing. Following wafer fabrication, our wafers are shipped to our assembly and test subcontractors where they are probed, singulated into individual dies, assembled into packaged chips, and undergo the process of electronic final testing. In order to minimize cost and reduce turn-around time, our products are designed to use low cost, industry standard packages and can be tested with widely available automatic testing equipment. We currently engage companies such as SPIL, PTI, YTEC, Huatian, and KYEC as our primary subcontractors for the assembly and testing of our products. We have dedicated teams of manufacturing engineers who maintain control over this process from the early stages of manufacturing. Our engineers work closely with our subcontractors to develop product testing and packaging programs to ensure these programs meet our product specifications, thereby maintaining our ownership of the functional and parametric performance of our semiconductors.

Quality and reliability assurance. We have designed and implemented a quality assurance system that provides the framework for continual improvement of products, processes and customer service. To ensure consistent product quality, reliability and yield, our quality assurance teams perform reliability engineering, quality control, International Organization for Standardization (“ISO”) system development, document control, subcontractor quality management and customer engineering services to closely monitor the overall process from IC design to after-sale customer support. In particular, we rely on in-depth simulation studies, testing and practical application testing to validate and verify our products. We emphasize a strong supplier quality management practice in which our manufacturing suppliers and subcontractors are pre-qualified by our quality assurance teams. Our suppliers are required to have a quality management system, certified to ISO 9000 standard as a minimum requirement. Our operations have been ISO 9001 certified since 1999.

Competition

We face competition from a number of competitors, including Marvell and Phison, our flash memory customers’ internal captive developments and small Chinese merchant controller suppliers.

The markets for our products are intensely competitive, and are characterized by rapid technological change, evolving industry standards, frequent new product introductions and pricing pressures. Competition has intensified as a result of the increasing demand for higher levels of performance at competitive prices. We expect competition to intensify further as current competitors continue to strengthen the depth and breadth of their product offerings and additionally, our competitors in China are benefited from the government’s semiconductor localization policy. We believe that our ability to compete successfully in the rapidly evolving markets for our products depends on a number of factors, including, but not limited to:

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While our ability to effectively compete depends in large part on our ability to protect our intellectual property, we believe that our technical expertise, customer support capabilities, and ability to introduce new products in a timely and cost-effective manner will be important factors in maintaining our competitive position.

We expect increased competition in the future from emerging or established companies, customers or other third parties, any of which could acquire significant market share. See “Risk Factors — Because the markets in which we compete are highly competitive and many of our competitors have greater resources than we have, we cannot be certain that our products will compete favorably in the marketplace” in Item 3 above.

Seasonality

See “Risk Factors — Our results of operations are subject to substantial quarterly and annual fluctuations due to a number of factors that could adversely affect our business and the price of our ADSs,” “Risk Factors — We are subject to the cyclical nature of the semiconductor industry, which has been subject to significant fluctuations,” and “Risk Factors — NAND industry cyclicality could adversely affect our growth and profitability” in Item 3 above and “Operating and Financial Review and Prospects — Principal Factors Affecting Our Results of Operations” in Item 5 below.

Intellectual Property

Our success and future revenue growth depend, in part, on our ability to protect our intellectual property. We rely on a portfolio of intellectual property rights, registered in the United States, Taiwan, and other countries, including patents, copyrights and trademark registrations, trade secret laws, contractual provisions, licenses, and other methods to protect our intellectual property.

As of March 31, 2024, we have 2,749 patents and 1,162 pending applications worldwide. There can be no assurance that patents will ever be issued with respect to these pending applications. Furthermore, it is possible that any patents held by us may be invalidated, circumvented, challenged or licensed to others. In addition, there can be no assurance that such patents will provide us with competitive advantages or adequately safeguard our proprietary rights. While we continue to file new patent applications with respect to our recent developments, existing patents are granted for prescribed time periods and will expire at various times in the future. We expect to continue to file patent applications where appropriate to protect our proprietary technologies.

Companies in the semiconductor industry have frequently demonstrated a readiness to commence litigation based on allegations of patent and other intellectual property infringement. From time to time, third parties may assert infringement claims against us. We may not prevail in any such litigation or may not be able to license patents from third parties on commercially reasonable terms, if at all. Litigation, regardless of the outcome, is likely to result in substantial cost and diversion of our resources, including our management’s time. Any such litigation could materially adversely affect us. In addition, in the contracts under which we sell semiconductor products, we may have agreed to indemnify our customers against losses arising out of claims of unauthorized use of intellectual property.

We intend to protect our intellectual property rights vigorously, but there can be no assurance that our efforts will be successful. In addition, the laws of other countries in which our products are sold may not protect our products and intellectual property rights to the same extent as the laws of the United States.

We claim copyright and trademark protection for proprietary documentation for our products and a variety of branding marks, respectively. We have registered “Silicon Motion” and its logo (a three-dimensional cube

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depiction of the letters “SM”), “NANDSustain,” “NANDXtend,” “SSDLifeGuard,” “SSDLifeSaver,” “TurboMLC,” “FerriSSD,” “Ferri-eMMC,” “Ferri-UFS,” the powered by SiliconMotion logo, “InstantView,” “MonTitan,” the MonTitan logo, the Shannon Systems logo, “PCIe-RAID,” “Hyper-IO,” “Bigtera,” the Bigtera logo, “VirtualStor,” “CloudStor,” and “StorVisor” as trademarks in the United States, Taiwan and/or other countries.

We also attempt to protect our trade secrets and other proprietary information through agreements with our customers, suppliers, employees and consultants and other customary security measures.

We have entered into license agreements with third-party intellectual property vendors for wafer fabrication tool libraries, semiconductor IP core, computer aided design tools and software.

Facilities

As of the date of this annual report, we occupy facilities totaling approximately 393,000 square feet, which house our management and administration, operations, R&D and sales and marketing departments. Of our facilities, approximately 182,400 square feet are owned and approximately 210,600 square feet are occupied under leases. We currently consider our facilities insufficient to meet our future operational requirements; therefore, we are constructing a new office building to meet our anticipated future needs. In 2018, we purchased 65,700 square feet of land in Hsinchu, Taiwan for the construction of a future office building, and, in 2021, we executed a property development agreement for the construction of a future office building in Taipei, Taiwan. See “Risk Factor — We are subject to risks associated with the development and construction of our office buildings” in Item 3 above. As of the date of this annual report, the table below lists the location of our operating facilities.

Leases covering our current facilities expire at varying dates, generally within the next five years. We anticipate no difficulty in retaining occupancy through lease renewals, month-to-month occupancy or replacing the leased facilities with equivalent facilities. As of December 31, 2023, lease obligations covering our current facilities totaled US$15.0 million, of which US$2.3 million was short-term.

We currently own commercial property in Shanghai of approximately 20,000 square feet, which we have no plans to use for our operations. Part of the Shanghai property is leased to third parties and the rest remains to be leased.

Our commercial property in Taipei, Taiwan of approximately 6,200 square feet was sold in October 2023.

Government Regulation

See “Risk Factors — Our business is subject to various governmental regulations, and compliance with these regulations may cause us to incur significant expense” in Item 3 above.

None.

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The following discussion of our financial condition and results of operations is based upon and should be read in conjunction with our consolidated financial statements and the related notes included in this annual report. This discussion may contain forward-looking statements based upon current expectations that involve risks and uncertainties. Our actual results may differ materially from those anticipated in these forward-looking statements as a result of various factors, including those set forth under the caption “Risk Factors” included in Item 3 of this annual report. See “Special Note Regarding Forward-Looking Statements.”

Overview

We are a global leader in developing NAND flash controllers for SSDs and other solid state storage devices. We have over 20 years of experience developing specialized processor ICs that manage NAND components and deliver market leading, high- performance storage solutions widely used in enterprise and hyperscale data centers, PCs, smartphones and commercial and industrial applications. We have one of the broadest portfolios of controller intellectual properties developed from our deep understanding of NAND characteristics, which enables us to design both unique, highly optimized configurable IC plus related firmware controller platforms and complete turnkey controller solutions. In the last ten years, we have shipped over six billion NAND flash controllers. More NAND flash components, including current and up-coming generations of flash produced by Kioxia, Micron, Samsung, SK Hynix and its subsidiary Solidigm, Western Digital and YMTC, are supported by Silicon Motion controllers than any other company. Our customers include NAND flash makers, module makers, hyperscalers and OEMs.

We are a leading supplier of SSD controllers used in PCs and other client devices and leading merchant supplier of eMMC/UFS controllers used in smartphones and IoT devices. We also leverage our controller expertise to supply specialized small single-chip form factor SSDs for industrial, commercial and automotive applications. We market our controllers under the “SMI” brand and single-chip SSDs under the “FerriSSD,” “Ferri-eMMC,” and “Ferri-UFS” brands.

Summary of Consolidated Financial Results

Summary of the year ended December 31, 2023 is as follows:

Principal Factors Affecting Our Results of Operations

Net sales. Our net sales consist primarily of sales of our products, after deducting sales discounts and allowances for returns.

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Our net sales are denominated primarily in U.S. dollars. The percentages of our net sales by currency for the periods indicated are set forth in the following table:

The length of our sales cycle, from the day purchase orders are received until products are shipped to customers, is dependent on the availability of our product inventories. If we do not have sufficient inventories on hand to meet customer demands, approximately three months are generally required from the day purchase orders are received until finished goods are manufactured and shipped to customers. This cycle can take up to six months during times when capacity at independent foundries is being fully utilized. The potential delays inherent in the manufacturing process increase the risk that we may not be able to fulfill a customer’s order on time. All of our sales are made by purchase orders. Because our practice, which is consistent with industry practice, allows customers to reschedule orders on relatively short notice, order backlog may not be a good indicator of our future sales.

Because most of our semiconductor solutions are designed for the mobile and computing devices markets, we expect our business to be subject to seasonality, with higher net sales generally in the second half of each year, when customers place orders to meet increased demand during year-end holiday seasons. However, changing market and business conditions, including foundry wafer supply shortages, as well as changing product mix in recent years could make future assessments of the impact of seasonal factors on our business difficult.

Cost of sales. Our cost of sales consists primarily of the following costs:

We engage independent foundries for the manufacturing and subcontractors for the assembly and testing of our semiconductors. Our manufacturing cost is subject to the cyclical supply and demand conditions typical of the semiconductor industry. Our cost per wafer generally fluctuates with the availability of capacity at independent foundries. We believe that our cost of sales is substantially variable in nature.

Research and development expenses. Our R&D expenses consist primarily of employee salaries and related costs, stock-based compensation, tape-out and related project expenses and intellectual property and software licensing costs. We expense R&D expenditures as they are incurred.

Sales and marketing expenses. Our sales and marketing expenses consist primarily of employee salaries and related costs, stock-based compensation expense, commissions paid to independent distributors and costs for our advertising and promotional activities.

General and administrative expenses. Our general and administrative expenses consist primarily of employee salaries and related costs, stock-based compensation expense, insurance premiums, professional fees and allowance for doubtful accounts.

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Accounting for stock-based compensation. We grant restricted stock units to our employees and members of our board of directors. The value of our restricted stock units is expensed over the vesting period and based on the grant date share price, less the present value of expected dividends during the vesting period, discounted at a risk-free interest rate.

Non-operating income and expenses. Our non-operating income and expenses include unrealized holding gain on investment, interest from deposited cash, gains or losses on foreign exchange rates, interest paid on loans and other non-operating income and expenses not categorized above. We conduct an assessment on the value of our long-term investments quarterly and make corresponding write-downs as required to the value of the long-term investments.

Provision for income taxes. We must make certain estimates and judgments in determining income tax expenses for financial statement purposes. These estimates and judgments occur in the calculation of tax credits, benefits, deductions and allowance, and in the calculation of certain tax assets and liabilities, which arise from differences in the timing of recognition of revenue and expense for tax and financial statement purposes, as well as the interest and penalties related to uncertain tax positions.

We have operations in several countries, which include Taiwan, China, Hong Kong, Macau and the United States and determine income taxes for each of the jurisdictions where we operate.

Critical Accounting Estimates

Our discussion and analysis of our financial condition and results of operations are based upon our consolidated financial statements, which have been prepared in accordance with U.S. GAAP.

The preparation of our consolidated financial statements requires us to make estimates and judgments that affect the reported amount of assets, liabilities, net sales and expenses, and related disclosure of contingent assets and liabilities. We base our estimates and judgments on our historical experience, knowledge of current conditions and our beliefs of what could occur in the future considering available information. Because our estimates may vary in each situation, our actual results may differ from our estimates under different assumptions and conditions.

Our management considers the following factors in reviewing our consolidated financial statements:

The selection of critical accounting policies, the judgments and other uncertainties affecting the application of those policies and the sensitivity of reported results to changes in conditions and assumptions are factors to be considered when reviewing our consolidated financial statements. Our principal accounting policies are set forth in detail in Note 2 to our consolidated financial statements included elsewhere in this annual report.

Critical accounting estimates are defined as those accounting estimates made in accordance with U.S. GAAP that involve a significant level of estimation uncertainty and have had or are reasonably likely to have a material impact on our financial condition or results of operations. We believe the following are our critical accounting estimates:

Inventory valuation. We value inventories at the lower of cost or net realizable value for raw materials, work-in-process and finished goods. Inventories are recorded at standard cost and adjusted to the approximate weighted-average cost at the balance sheet date. We assess net realizable value of the inventory for estimated obsolescence or unmarketable inventory based upon management’s assumptions about future demand and market conditions. In estimating reserves for obsolescence, we primarily evaluate estimates based on the timing of the

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introduction of new products and the quantities remaining of old products and provides reserves for inventory on hand in excess of the estimated demand. Estimated losses on slow-moving items are recognized and included in the allowance for losses. We wrote down US$5.7 million, US$15.8 million and US$7.9 million in 2021, 2022 and 2023, respectively, for estimated obsolete or unmarketable inventory, with write-downs in 2021, 2022 and 2023 primarily related to the value of NAND components and SSDs in inventory affected by rapidly falling NAND prices and the restructuring of our underperforming product lines.

We have not made any material changes in the accounting methodology used to evaluate obsolescence or unmarketable inventory during the last three fiscal years. However, if actual results are not consistent with our estimates and assumptions used to calculate inventory write-downs, we may be exposed to inventory write-downs that could be material. If we have experienced significant industry fluctuations, maturing product cycles and new product introductions of both semiconductor companies’ and their customers’ products and fluctuations in general economic conditions, we may be exposed to future obsolescence or unmarketable inventory.

Accounting for income taxes. In preparing our consolidated financial statements, we are required to estimate our income taxes in each of the jurisdictions in which we operate. We are tax residents in numerous taxing jurisdictions around the world and have identified our major tax jurisdictions as Taiwan, Hong Kong, Macau and China with statutory tax rates of 20%, 16.5%, 12% and 25%, respectively, and estimate our actual current tax exposure together with assessed temporary differences resulting from differing treatment of items for tax and accounting purposes. These differences result in deferred tax assets and liabilities, which are included within our consolidated balance sheet. We must then assess the likelihood that our deferred tax assets will be recovered from future taxable income within the relevant jurisdiction and, to the extent we believe that recovery is not likely, we must establish a valuation allowance. The total amount of valuation allowance as of December 31, 2021, 2022 and 2023 was US$21.8 million, US$20.2 million and US$23.1 million, respectively. We provide for a valuation allowance to the extent we believe that it is more likely than not that the deferred tax assets will not be recovered from future taxable income. Realization of future tax benefits related to the deferred tax assets is dependent on many factors, including our ability to generate taxable income within the period during which the temporary differences reverse, the outlook for the economic environment in which we operate, and the overall future industry outlook. Should we determine that we would not be able to realize all or part of our net deferred tax asset in the future, an additional allowance for the deferred tax asset would be charged to income in the period the determination was made.

We utilize a two-step approach to recognizing and measuring uncertain tax positions. The first step is to evaluate the tax position for recognition by determining if the weight of available evidence indicates it is more likely than not that the position will be sustained on audit, including resolution of related appeals or litigation processes, if any. The second step is to measure the tax benefit as the largest amount that is more than 50% likely of being realized upon ultimate settlement. The total amount of unrecognized tax benefits as of December 31, 2021, 2022 and 2023 was US$26.3 million, US$37.1 million and US$43.8 million, respectively. As of December 31, 2022 and 2023, US$6.8 million and US$7.9 million, respectively, of interest and penalties were accrued. Fiscal years 2018 through 2023 remain subject to examination by the U.S. Internal Revenue Service and other foreign tax jurisdictions. The ultimate outcome of tax matters may differ from our estimates and assumptions. Unfavorable settlement of any particular issue would require the use of cash and could result in increased income tax expense. Favorable resolution could result in reduced income tax expense. Within the next 12 months, we do not expect that our unrecognized tax benefits would change significantly. See Note 12 to our consolidated financial statements for further information regarding changes in unrecognized tax benefits during 2023.

Legal Contingencies. From time to time, we are involved in legal actions or other third-party assertions arising in the ordinary course of business. There can be no assurance these actions or other third-party assertions will be resolved without costly litigation, in a manner that does not adversely impact our financial position, results of operations or cash flows or without requiring royalty payments in the future, which may adversely impact gross margins. We record a liability when it is probable that a loss has been incurred and the amount can

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be reasonably estimated. In determining the probability of a loss and consequently, determining a reasonable estimate, management is required to use significant judgment. Given the uncertainties associated with any litigation, the actual outcome can be different than our estimates and could adversely affect our results of operations, financial position and cash flows. See “Item 8. Legal Proceedings”.

Results of Operations

The following table sets forth our statements of operations as a percentage of net sales for the periods indicated:

Comparison of Year Ended December 31, 2023 to Year Ended December 31, 2022

Net sales.

In 2023, our net sales decreased by 32% year-over-year to approximately US$639.1 million, attributed to both a decline in overall controller shipments as well as ASPs. Our mobile storage revenue decreased by 32% year-over-year. Our SSD controller sales decreased in the range of 20% to 25% year-over-year to account for

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55% to 60% of revenue, a higher percentage of net sales than the prior year, eMMC plus UFS controller sales decreased in the range of 45% to 50% year-over-year to account for 25% to 30% of revenue, a lower percentage of net sales than the prior year, and SSD solutions sales decreased in the range of 25% to 30% year-over-year to account for 5% to 10% of revenue, a similar percentage of net sales as the prior year.

Gross profit.

Gross profit as a percentage of net sales decreased to 42% in 2023 as compared to 49% in 2022 primarily because of lower gross margin our mobile storage sales. Our gross profit, excluding obsolete and unmarketable inventory write-downs, as a percentage of revenue decreased from 51% in 2022 to 44% in 2023.

Research and development expenses.

Our Research and development expenses decreased by 8% year-over-year to approximately US$174.4 million in 2023. Salary and benefits decreased by 12% year-over-year to approximately US$93.6 million in 2023. Stock-based compensation decreased by 37% year-over-year to approximately US$11.7 million. Other research and development expenses increased by 9% year-over-year to approximately US$69.1 million, primarily because of higher IC tape-out and other project expenses in 2023.

Sales and marketing expenses.

Our sales and marketing expenses decreased by 15% year-over-year to approximately US$26.9 million in 2023. Salary and benefits decreased by 10% year-over-year to approximately US$17.2 million in 2023. Stock-based compensation decreased by 32% year-over-year to approximately US$1.9 million in 2023. Other sales and marketing expenses decreased by 19% year-over-year to approximately US$7.8 million.

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General and administrative expenses.

Our general and administrative expenses decreased by 11% year-over-year to approximately US$27.9 million in 2023. Salary and benefits decreased by 19% year-over-year to approximately US$11.2 million. Stock-based compensation decreased by 23% year-over-year to approximately US$3.6 million in 2023. Other general and administrative expenses increased by 1% year-over-year to approximately US$13.1 million in 2023, primarily because of legal, financial advisory and other fees related to dispute expenses in connection with arbitration of the terminated Merger Agreement.

Stock-based compensation.

The following table presents details of total stock-based compensation that is included in each functional line item in our consolidated statements of income:

See Note 14 to our consolidated financial statements for a discussion of activity related to stock-based awards.

Loss from settlement of litigation. We paid US$390 thousand in 2022 and US$1.3 million in 2023 to settle legal litigations.

Unrealized holding gain on investment. We recognized a gain of US$896 thousand in 2022 and US$ 8.0 million in 2023 for the net change in fair value of the investments in equity securities.

Interest income. Our interest income increased to approximately US$12.2 million for the year ended December 31, 2023 from approximately US$2.7 million for the year ended December 31, 2022 due to higher interest rates and higher cash balance.

Interest expense. Interest expense decreased from US$71 thousand for the year ended December 31, 2022 to nil for the year ended December 31, 2023.

Foreign exchange gain (loss), net. For the year ended December 31, 2023, we realized a foreign exchange gain of US$914 thousand, compared with a loss of US$4.9 million for the year ended December 31, 2022. We do not engage in any hedging activities.

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Income tax expense. Income tax expense was approximately US$8.2 million for the year ended December 31, 2023 compared to an income tax expense of approximately US$40.1 million for the year ended December 31, 2022.

Net income. Net income was approximately US$52.9 million for the year ended December 31, 2023 compared to a net income of approximately US$172.5 million for the year ended December 31, 2022.

Comparison of Year Ended December 31, 2022 to Year Ended December 31, 2021

For the discussion covering the comparison between the years ended December 31, 2022 and 2021, please refer to “Item 5” of our annual report on Form 20-F for the year ended December 31, 2022 filed with the SEC on April 28, 2023.

Liquidity and Capital Resources

As of December 31, 2023, we had approximately US$314.3 million in cash and cash equivalents, an increase of US$82.1 million from December 31, 2022. We maintain our cash balances in bank deposits and in money market instruments. We do not engage in any currency hedging activities.

We believe cash we expect to generate from operating activities will be sufficient to meet our anticipated working capital needs, capital expenditures, and other commitments for at least the next 12 months and into the foreseeable future. Our future capital requirements will depend on many factors, including the level of our net sales, the timing and extent of spending to support product development efforts, the expansion of sales and marketing activities, the timing of introductions of new products, the costs to ensure access to adequate manufacturing capacity, the continuing market acceptance of our products, and construction of our Hsinchu and Taipei office buildings. We could be required, or could elect, to seek additional funding through public or private equity or debt financing, and additional funds may not be available on terms acceptable to us or at all.

The following table sets forth a summary of our cash flows for the periods indicated:

Operating activities

Our net cash provided by operating activities was approximately US$149.1 million for the year ended December 31, 2023, compared to net cash provided by operating activities of approximately US$83.9 million and US$174.7 million during 2022 and 2021, respectively.

For the year ended December 31, 2023, cash flow provided by operations of US$149.1 million resulted primarily from our net income of US$52.9 million and the following reasons:

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For the year ended December 31, 2022, cash flow provided by operations of US$83.9 million resulted primarily from our net income of US$172.5 million and the following reasons:

Investing activities

Our net cash used in investing activities was approximately US$49.1 million for the year ended December 31, 2023, compared to net cash used in investing activities of approximately US$32.9 million for the year ended December 31, 2022. In 2023, we paid US$21.1 million for the routine purchase of software, design tools and other items, and US$28.0 million for building construction in Hsinchu.

Our net cash used in investing activities was approximately US$32.9 million for the year ended December 31, 2022, compared to net cash used in investing activities of approximately US$28.2 million for the year ended December 31, 2021. In 2022, we paid US$19.7 million for the routine purchase of software, design tools and other items, and US$13.2 million for building construction in Hsinchu.

Financing activities

Our net cash used in financing activities was approximately US$16.7 million for the year ended December 31, 2023, compared to net cash used in financing activities of approximately US$183.1 million for the year ended December 31, 2022. Our cash used in financing activities in 2023 consists primarily of US$16.7 million of dividend payments.

Our net cash used in financing activities was approximately US$183.1 million for the year ended December 31, 2022, compared to net cash used in financing activities of approximately US$99.7 million for the year ended December 31, 2021. Our cash used in financing activities in 2022 consists primarily of US$49.9 million of dividend payments and US$133.2 million for share repurchases.

Capital Return to Shareholders

Dividend. On October 25, 2021 and October 30, 2023, we announced an annual cash dividend of US$2.00 per ADS to be paid in four quarterly installments of US$0.50 per ADS, we paid US$49.9 million and US$16.7 million to shareholders in 2022 and 2023, respectively. The dividend program was halted during most of 2022 due to the proposed Transaction with MaxLinear; however, our board of directors decided to reinstate the cash dividend payments in an announcement on October 30, 2023 since the Transaction with MaxLinear was terminated.

The declaration and payment of future cash dividends is subject to our board of directors’ continuing discretion and determination that the payment of dividends is in the best interests of our shareholders and is in compliance with all laws and agreements applicable to the declaration and payment of cash dividends.

Share Repurchase. On December 7, 2021, our board of directors authorized a share repurchase program to repurchase up to US$200 million of our ADSs over a 6-month period. In the year ended December 31, 2022, we

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repurchased 1.6 million ADSs for US$128.8 million at an average price of US$79.18 per ADS and in the year ended December 31, 2021, we repurchased 0.6 million ADSs for US$50 million at an average price of US$89.87 per ADS.

Share repurchases are made in the open market or according to other methods in compliance with SEC Rule 10b-18 under the Exchange Act, subject to market conditions, applicable legal requirements and other factors. Share repurchase plans announced do not obligate us to acquire any particular amount of ADSs and may be suspended at any time at our discretion.

Cash Requirements

Our material cash requirements include the following contractual and other obligations:

Operating Leases. Operating lease obligations represent the undiscounted remaining lease payments primarily for our leased property and equipment, see Note 15 to our consolidated financial statements. As of December 31, 2023, these obligations totaled US$15.0 million, of which US$2.3 million was short-term.

Office Building Construction. In September 2018, the Company paid US$58.9 million to acquire land in Hsinchu, Taiwan intended for its future Taiwan headquarters building. Construction work commenced at this site in January 2021, and is currently targeted for completion later in 2024. An estimated cash requirement for the construction project is approximately US$27.7 million in 2024. We won a bid with a third party to build an office building in Taipei and entered into a property development agreement in May 2021. Based on the terms of the property development agreement, the Company is required to complete construction within three years after the construction license is approved. At this time, we are unable to accurately measure the construction progress and make a reasonably reliable estimate of the timing and future payments to the contractor, see Note 16 to our consolidated financial statements.

Tax Liability. Tax liability represents the provision for income tax and uncertain tax position recognized, see Note 12 to our consolidated financial statements. As of December 31, 2023, short-term taxes payable totaled US$7.5 million. We increased long-term taxes payable of US$6.7 million related to uncertain tax positions as of December 31, 2023. At this time, we are unable to make a reasonably reliable estimate of the timing of payments in individual years beyond 12 months due to uncertainties in the timing and outcome of a potential tax audit.

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Recent Accounting Pronouncements

Please refer to Note 2 to the consolidated financial statements

Directors and Senior Management

Members of our board of directors are elected by our shareholders. Our board of directors consists of nine directors. Members of our senior management are appointed by, and serve at the discretion of, our board of directors. The following table sets forth information regarding our directors and senior management members as of the date of this annual report.

Senior Management Members and Directors

James Chow, Chairman of the Board of Directors

Mr. Chow has served as the Chairman of our board of directors since April 2005. Mr. Chow has been the Chairman of Concord Financial Co., Ltd. since 1993. Concord Financial Co., Ltd. is an investment holding company. Mr. Chow has an MBA from Columbia University.

Wallace C. Kou, President, Chief Executive Officer, Managing Director

Mr. Kou founded Silicon Motion in 1995 and has been our President and Chief Executive Officer since our founding. Prior to founding Silicon Motion, Mr. Kou was the Vice President and Chief Architect at the Multimedia Products Division of Western Digital Corporation, which developed graphics processors for notebook PCs and was sold to Philips Semiconductor in 1995. Before Western Digital, Mr. Kou worked for Wyse Technology. Mr. Kou has a BS in Electrical & Control Engineering from the National Chiao Tung University in Taiwan and an MS in Electrical & Computer Engineering from the University of California at Santa Barbara.

Steve Chen, Director

Mr. Chen joined our board of directors in 2012. Mr. Chen is the chairman of Mercuries Co., Ltd. Mr. Chen has dual M. Eng. from Cornell University.

Tsung-Ming Chung, Director

Mr. Chung joined our board of directors in June 2005. Mr. Chung is the Chairman of Dynapack International Technology Corp., a leading provider of battery packs for notebook PCs and tablets. From 1985 to

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2000, Mr. Chung was an audit partner at Arthur Andersen. He is also a director at Far East International Bank and was a director at Fubon Hyundai Life Insurance Corporation through March 2024. Mr. Chung has a BA in Business Administration from the National Taiwan University and an MBA from the National Cheng-chi University in Taiwan.

Lien-Chun Liu, Director

Ms. Liu joined our board of directors in June 2005. She serves on the board of the International Council of Women, on the board of supervisors of Concord VIII Venture Capital Co., Ltd. and on the board of directors of New Tamsui Golf Course. She was formerly a research fellow at the Taiwan Research Institute and served on the board of supervisors of China Television Corp. from 2000 to 2004. Ms. Liu has a BA from Wellesley College and a JD from Boston College Law School.

Han-Ping D. Shieh, Director

Mr. Shieh joined our board of directors in 2014. He is Life Chair Professor at National Yang Ming Chiao Tung University (NYCU) in Taiwan, a fellow of the Institute of Electrical and Electronics Engineers (IEEE), the Optical Society of America (OSA) and the Society for Information Display (SID) and a board member of Tailiang Technology Inc., Dynapack International Tech. Corp., and Focal Tech Inc. Mr. Shieh received his PhD in Electrical and Computer Engineering from Carnegie Mellon University in 1987. He joined National Chiao Tung University (NCTU) as a professor in 1992 and was previously a Research Staff Member at the IBM Thomas J. Watson Research Center. He was the Dean of the College of Electrical and Computer Engineering and a Senior Vice President of NCTU and a Vice Chancellor of the University System of Taiwan.

Kenneth Kuan-Ming Lin, Director

Mr. Lin joined our board of directors in September 2018. Mr. Lin was previously a director on our board from 2009 to 2014. Mr. Lin is the Chairman of Premier Capital Management Corp., and Ruby Tech Corp., the Chief Executive Officer of SINOCON Industrial Standards Foundation and Deputy Secretary-General of Cross-Strait CEO Summit. He was previously the Chairman of Taiwan Venture Capital Association and Taiwan Private Equity Association. Mr. Lin has a BS in Electrical Engineering from the National Taiwan University.

Cain Lin, Director

Mr. Lin joined our board of directors in December 2023. Mr. Lin is the Managing Director of Cedar Capital Inc., and he formerly served on the board of directors of Auras Technology Co., Ltd. Mr. Lin has over 35 years of experience in the semiconductors and venture capital industries in executive-level roles and holds a BA in Electronic Engineering from National Chen Kung University in Taiwan, an MBA from Santa Clara University, and an MS in Electronic Engineering from the University of Florida.

Jason Tsai, Interim Chief Financial Officer

Mr. Tsai joined us in September 2023. He has over 25 years of experience in strategic finance, corporate strategy, investor relations, and Wall Street. His corporate experience spans from software (SaaS) to hardware and semiconductors and prior to rejoining Silicon Motion, Mr. Tsai was Head of IR at Zendesk, Synaptics and Silicon Motion (2008 – 2019) as well as over a decade as a Wall Street equity research analyst. Mr. Tsai holds a BA in Economics and Molecular and Cell Biology from UC Berkeley.

Nelson Duann, Senior VP of Client & Automotive Storage Business and Director

Mr. Duann became our Senior Vice President of Client & Automotive Storage in December 2023, after serving as Senior Vice President of Marketing and R&D for mobile storage since November 2018. In this role, he oversees product planning, major OEM business development and OEM project management for the Company’s

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client SSD controllers, mobile controllers, Ferri products and expandable controllers. He joined Silicon Motion in August 2007 as a product marketing director and R&D team leader. Having served with Silicon Motion since 2007, Mr. Duann has nearly 25 years of experience in product design, development, and marketing in the semiconductor industry. Mr. Duann was most recently leading Silicon Motion’s marketing and R&D efforts and has played a key role in leading the company’s OEM business for mobile storage and SSD controller solutions, helping to introduce these products to growing them into the market leaders in these markets today. Prior to Silicon Motion, he worked for Sun Microsystems focusing on UltraSPARC microprocessor projects. Mr. Duann has an MS in Communications Engineering from National Chiao Tung University in Taiwan and an MS in Electrical Engineering from Stanford University.

Alex Chou, Senior VP of Enterprise Storage & Display Interface Solution Business

Mr. Chou became our Senior Vice President of Enterprise Storage & Display Interface Solution in December 2023. In this role, he is responsible for leading the Company’s enterprise storage group, to expand the business into data center and enterprise storage as well as expand the Company’s display interface business into the PC docking market. Mr. Chou has over 30 years industry experience in ASIC design/applications engineering, product marketing, business strategy, and executive-level business engagement. Prior to Silicon Motion, Mr. Chou was Senior Vice President at Synaptics, where he was the GM responsible for the growth and success of its Wireless Connectivity business. Prior to that, he spent more than 18 years at Broadcom, and was responsible for their enterprise networking, Wi-Fi network solutions and client WIFI/BT/GNSS as VP of Product Marketing at Broadcom’s Wireless Connectivity BU. Mr. Chou holds an BS degree from National Cheng Kung University in Taiwan, and an MS in Computer Engineering from Syracuse University in New York.

Robert Fan, Senior VP of Global Sales

Mr. Fan became our Senior Vice President of Global Sales in December 2023 and has served as President of SMI USA, our business operations in the Americas and Europe since November 2016 until his promotion in December 2023. He leads Silicon Motion’s worldwide sales, sales operations and FAEs. He also oversees corporate marketing communications and public relations. Mr. Fan joined Silicon Motion in May 2013. Prior to Silicon Motion, Mr. Fan served in executive management roles at Spansion, IDT, and at two venture capital-backed startups. He also spent over nine years at Intel in sales, marketing and management positions and was a chip designer earlier in his career. Mr. Fan holds a BS in EECS from UC Berkeley, an MSEE from Santa Clara University and completed the General Management Executive Program at McCombs School of Business, University of Texas.

There is no arrangement or understanding with major shareholders, customers, suppliers or others pursuant to which any person referred to above was selected as a director or member of senior management. There are no family relationships among any of our directors or senior management members.

Board Practices

Board Committees

Our board of directors has established an audit committee, a compensation committee, and a nominating and corporate governance committee.

Audit Committee. The audit committee is responsible for reviewing the financial information that will be provided to shareholders and others, reviewing the systems of internal controls that management and the board of directors have established, appointing, retaining and overseeing the performance of independent registered public accounting firms, overseeing our accounting and financial reporting processes and the audits of our consolidated financial statements, and pre-approving audit and permissible non-audit and non-assurance services provided by independent registered public accounting firms. Mr. Tsung-Ming Chung, Ms. Lien-Chun Liu, and Mr. Cain Lin

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are members of our audit committee. Our board of directors has determined that Mr. Tsung-Ming Chung, the Chairman of the audit committee, is the committee’s “audit committee financial expert” under applicable SEC rules and an independent director under Nasdaq listing standards.

Compensation Committee. The compensation committee’s basic responsibility is to review the performance and development of management in achieving corporate goals and objectives and to assure that our senior executives are compensated effectively in a manner consistent with our strategy, competitive practice and the requirements of the appropriate regulatory bodies. The compensation committee also administers the Company’s Incentive-Based Compensation Recovery Policy (the “Clawback Policy”). Toward that end, this committee oversees, reviews and administers all of our compensation, equity and employee benefit plans and programs. Ms. Lien-Chun Liu, Mr. Steve Chen, and Mr. Cain Lin are members of our compensation committee, with Mr. Chen serving as the Chairman of the committee.

Nominating and Corporate Governance Committee. The nominating and corporate governance committee is responsible for overseeing, reviewing and making periodic recommendations concerning our corporate governance policies, and for recommending to the full board of directors candidates for election to the board of directors. Ms. Lien-Chun Liu, Mr. Steve Chen, and Mr. Cain Lin are members of our nominating and corporate governance committee, with Ms. Liu serving as the Chairman of the committee.

Our board of directors has adopted a code of conduct and ethics (the “Code of Ethics”), which is applicable to all of our directors, officers (which includes members of senior management), and employees. Our Code of Ethics is posted on our website at www.siliconmotion.com.

Duties of Directors

Under Cayman Islands law, our directors have a duty to act honestly, in good faith and with a view to the best interests of our company and for a proper purpose. A director must exercise the skill and care of a reasonably diligent person having both – (a) the general knowledge, skill and experience that may reasonably be expected of a person carrying out the same functions as are carried out by that director in relation to the company (an objective test), and (b) if greater, the general knowledge, skill and experience that that director actually possesses (a subjective test). In fulfilling their duty of care to our company, our directors must ensure compliance with our memorandum and articles of association. Our company has the right to seek damages if a duty owed by our directors is breached. In certain limited exceptional circumstances, a shareholder may have the right to seek damages in the name of our company if a duty owed by our directors is breached. Our board of directors has all the powers necessary for managing, and for directing and supervising, our business affairs. The functions and powers of our board of directors include, among other things:

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Terms of Directors and Senior Management

Our amended and restated articles of association provide that, at each annual general meeting, one-third of our directors for the time being (or, if their number is not a multiple of three, the number nearest to but not greater than one-third) shall retire from office by rotation provided that the chairman of our board of directors, and/or the managing director of our company shall not, whilst holding such office, be subject to retirement by rotation nor to be taken into account in determining the number of directors to retire.

The directors to retire by rotation shall include any director who wishes to retire and not offer him/herself for re-election. Any further directors to retire shall be those of the other directors subject to retirement by rotation who have been longest in office since their last re-election or appointment so that as between persons who became or were last re-elected directors on the same day those to retire will (unless they otherwise agree among themselves) be determined by lot. Any director appointed pursuant to article 86(2) or appointed by the directors pursuant article 86(3) will not be taken into account in determining which particular directors or the number of directors who are to retire by rotation.

The directors have the power to appoint any person as a director either to fill a casual vacancy on the board of directors or as an addition to the existing board of directors. Any director so appointed shall hold office only until the next following annual general meeting of our company and shall then be eligible for re-election.

Two of our seven directors are currently subject to re-election at our next annual general meeting of shareholders.

Our officers, including members of senior management, are appointed by and serve at the discretion of our board of directors.

Limitation on Liability and Other Indemnification Matters

Cayman Islands law does not limit the extent to which a company’s memorandum and articles of association may provide for indemnification of officers (which includes members of senior management) and directors, except to the extent any such provision may be held by the Cayman Islands courts to be contrary to public policy, such as to provide indemnification against civil fraud or the consequences of committing a crime. Under our amended and restated articles of association, our company is authorized to indemnify its directors, secretary and other officers (which includes members of senior management) for the time being and the liquidator or trustees (if any) for the time being acting in relation to any of the affairs of our company and everyone of them, and everyone of their heirs, executors and administrators, from and against all actions, costs, charges, losses, damages and expenses which they or any of them, their or any of their heirs, executors or administrators, shall or may incur or sustain by or by reason of any act done, concurred in or omitted in or about the execution of their duty or supposed duty, in their respective offices or trusts provided that any such indemnity shall not extend to any matter in respect of any fraud, dishonesty, willful misconduct or bad faith which may attach to them. Our amended and restated articles of association contains a provision by which its shareholders waive any claim or right of action that they may have, whether individually or by or in the right of our company, against any director on account of any action taken by such director, or the failure of such director to take any action in the performance of his or her duties with or for our company, except in respect of any fraud or dishonesty of such director.

Compensation of Directors and Senior Management

For the year ended December 31, 2023, the aggregate compensation to our directors and senior management members was approximately US$3.50 million. In 2023, under the 2015 Incentive Plan (the “2015 Plan”), we granted restricted stock units to our directors and senior management members as a group to acquire an aggregate of 60,000 ordinary shares. The restricted stock units granted to our senior management members and non-executive directors are subject to the same vesting conditions as those of our employees. As of December 31, 2023, the total amount set aside as an estimate by us to provide pension, retirement or similar benefits to our

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members of senior management (we do not provide any such benefits to our directors in such capacities) was in the aggregate amount of approximately US$0.43 million.

Service Contracts

We currently do not have service contracts with our directors.

Share-Based Compensation Plan and Option Grants

On June 3, 2015, the board of directors adopted the 2015 Plan. The 2015 Plan reserved 20,000,000 ordinary shares for issuance upon exercise of stock options and restricted stock units. The 2015 Plan provides for the grant of stock options, stock bonuses, restricted stock awards, restricted stock units and stock appreciation rights to our employees (including members of senior management), directors and consultants.

Share Reserve. The aggregate number of ordinary shares that may be issued pursuant to awards granted under the 2015 Plan may not exceed 20,000,000.

The following types of shares issued under the 2015 Plan may again become available for the grant of new awards under the 2015 Plan: restricted stock issued under the 2015 Plan that is forfeited or repurchased by us prior to it becoming fully vested; shares withheld for taxes; shares tendered to us to pay the exercise price of an option; and shares subject to awards issued under the 2015 Plan that have expired or otherwise terminated without having been exercised in full.

Administration. The board of directors will administer the 2015 Plan and may delegate this authority to administer the 2015 Plan to a committee. Currently, the board of directors delegated the administration of the 2015 Plan to the compensation committee. Subject to the terms of the 2015 Plan, the plan administrator, which is our board of directors or its authorized committee, determines recipients, grant dates, the amounts and types of stock awards to be granted and the terms and conditions of the stock awards, including the period of their exercisability and vesting. Subject to certain limitations, the plan administrator will also determine the exercise price of options granted, the purchase price for restricted stock and restricted stock units, and, if applicable, the strike price for stock appreciation rights.

Capitalization adjustments. In the event of a dividend or other distribution (whether in the form of cash, ordinary shares, other securities, or other property), recapitalization, stock split, reorganization, merger, consolidation, exchange of our ordinary shares or our other securities, or other change in our corporate structure, the board of directors may adjust the number and class of shares that may be delivered under the 2015 Plan and the number, class and price of the shares covered by each outstanding stock award.

Changes in control. In the event of a change in control of the Company, all outstanding options and other awards under the 2015 Plan may be assumed, continued or substituted for by any surviving or acquiring entity. If the surviving or acquiring entity elects not to assume, continue or substitute for such awards, the vesting of such awards held by award holders whose service with us or any of our affiliates has not terminated will be accelerated and such awards will be fully vested and exercisable immediately prior to the consummation of such transaction, and the stock awards shall automatically terminate upon consummation of such transaction if not exercised prior to such event.

Future amendments and termination. The board of directors may amend (subject to shareholder approval if required by applicable law), suspend or terminate the 2015 Plan at any time. The 2015 Plan will terminate pursuant to its terms on June 3, 2025.

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Employees

The following table sets forth the number of our employees categorized by function as of the dates indicated.

As of December 31, 2023, we had 1,546 total employees, including 1,305 in Taiwan, 33 in the United States, 186 in China, 11 in Korea, and 11 in Japan. Of our total employees, 1,386 are engineers.

We do not have any collective bargaining arrangements with our employees and consider our relations with our employees to be good.

Share Ownership

Under U.S. securities law, a person is deemed to be a “beneficial owner” of a security if that person has or shares “voting power,” which includes the power to vote or to direct the voting of such security, or “investment power,” which includes the power to dispose of or to direct the disposition of such security. A person is also deemed to be the beneficial owner of any securities of which that person has a right to acquire beneficial ownership within 60 days. Under these rules, more than one person may be deemed a beneficial owner of securities as to which such person has no economic interest.

There were 134,726,480 of our ordinary shares outstanding as of March 31, 2024. The following table sets forth information with respect to the beneficial ownership of our ordinary shares as of March 31, 2024, less otherwise indicated in the footnotes, by each of our directors and members of senior management:

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Disclosure of a Registrant’s Action to Recover Erroneously Awarded Compensation

There was no erroneously awarded compensation that was required to be recovered pursuant to our Clawback Policy during the fiscal year ended December 31, 2023.

Clawback Policy

The Company maintains a policy required by the rules of Nasdaq and the SEC providing that, subject to certain exemptions provided by the rules of Nasdaq and the SEC, in the event that the Company is required to prepare an accounting restatement, it will recover incentive based-compensation received by any current or former executive officer that was based upon the attainment of a financial reporting measure that was erroneously awarded during the three-year period preceding the date that the restatement was required.

Major Shareholders

As of March 31, 2024, there were 134,726,480 of our ordinary shares outstanding. The Bank of New York Mellon (the “Depositary Bank”), the depositary under our ADS deposit agreement, has advised us that as of March 31, 2024, we had 33,615,591 ADSs outstanding, representing 134,462,364 ordinary shares.

Based on SEC filings as of the date of the filing of this annual report, we are not aware of any shareholder holding in excess of 5% of our outstanding ordinary shares. To our knowledge, we are not owned or controlled, directly or indirectly, by another corporation, by any foreign government or by any other natural or legal persons, severally or jointly.

No holder of our ordinary shares has preferential voting rights.

Related Party Transactions

No related party transactions occurred since January 1, 2021.

Consolidated Financial Statements

See “Item 18. Financial Statements” and pages F-1 through F-30 of this annual report.

Legal Proceedings

As an active operating company, we are subject to legal proceedings and claims, either asserted or unasserted, which arise in the ordinary course of business. Although the outcome of such proceedings and claims cannot be predicted with certainty, management does not believe that the outcome of any of these matters will have a material adverse effect on our business, results of operations, financial position or cash flows. Any litigation, however, involves potential risk and potentially significant litigation costs, and therefore there can be no assurance that any litigation which is now pending or which may arise in the future would not have such material adverse effect on our business, financial position, results of operations or cash flows.

On August 10, 2023, a customer of our affiliate, Bigtera (Beijing) Ltd., filed a lawsuit in Beijing Chaoyang District Court against Bigtera (Beijing) Ltd., asserting that Bigtera (Beijing) Ltd. is in breach of its two purchase contracts with the said customer due to ceasing its operations. Beijing Chaoyang District Court accepted this case, but no court date has been scheduled so far.

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On October 5, 2023, we filed a claim in the SIAC against MaxLinear for breaching the Merger Agreement. In the arbitration, we are seeking payment of the termination fee of US$160 million, together with further substantial damages, interests, and costs. However, in the event that an award is handed down in favor of the Company there is a risk that it will not be able to collect the award due to MaxLinear’s financial condition. In addition, there is a risk that if the Company does not prevail on some or all of its claims, there is a risk that it can be required to pay some or all of MaxLinear’s legal fees and costs. The arbitration tribunal has been constituted, a procedural timetable has been issued and a hearing has been fixed for October 2025. Under the SIAC Arbitration Rules, all matters relating to the proceeding are confidential.

On November 20, 2023, MaxLinear filed its defense to the aforementioned claims, asserting that the Company breached the Merger Agreement because its business allegedly sustained a material adverse effect and it failed to operate its business in the ordinary course. MaxLinear also asserted a claim for fraud, alleging that the projections that it was provided prior to entering into the Merger Agreement were inflated. MaxLinear seeks damages in an unspecified amount. The Company believes that the claims are meritless.

Dividend Policy

See “Risk Factors — There can be no assurance that we will declare cash dividends in the future in any particular amounts or at all” in Item 3 above.

Significant Changes

No significant changes have occurred since the date of our audited consolidated financial statements.

Our ADSs, each representing four of our ordinary shares, have been listed on Nasdaq since June 30, 2005. Our ADSs trade under the symbol “SIMO.” The Nasdaq Global Select Market is the principal trading market for our ADSs, which are not listed on any other exchanges in or outside the United States.

Memorandum and Articles of Association

The information called for by Item 10.B of Form 20-F (“Memorandum and Articles of Association”) is incorporated by reference to the information under the heading “Description of Share Capital” in our Registration Statement on Form F-1, as amended (Registration Number 333-125673) and as filed with the SEC on June 9, 2005.

Material Contracts

We have not entered into any material contracts within the past two fiscal years other than in the ordinary course of business and other than those described in Item 4, “Information on the Company” or elsewhere in this annual report.

Exchange Controls

There are currently no exchange control regulations or currency restrictions in the Cayman Islands.

Taxation

United States Federal Income Taxation

The following discussion summarizes certain U.S. federal income tax consequences to a U.S. Holder, as defined below, who purchases our ADSs and ordinary shares. This discussion assumes that investors will hold their ADSs or ordinary shares as capital assets (generally, property held for investment). This discussion does not

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discuss all aspects of U.S. federal income taxation which may be important to particular investors in light of their individual circumstances, including investors subject to special taxation, such as:

This discussion is based in part on representations by the Depositary Bank and assumes that each obligation under the deposit agreement and any related agreement will be performed in accordance with its terms. Furthermore, the discussion below is based upon the provisions of the Internal Revenue Code of 1986, as amended (the “Code”), and U.S. Treasury regulations, rulings and judicial decisions hereunder as of the date hereof. Such authorities are subject to change, possibly on a retroactive basis, which may result in U.S. federal income tax consequences different from those discussed below.

A person considering an investment in our ADSs or ordinary shares is urged to consult its tax advisor concerning U.S. federal, state, local and non-U.S. income and other tax consequences.

A U.S. Holder is a beneficial owner of ADSs or ordinary shares that is for U.S. federal income tax purposes:

A beneficial owner of ADSs or ordinary shares that is not a U.S. Holder is referred to herein as a “Non-U.S. Holder.” If a partnership or limited liability company treated as a partnership for U.S. federal income tax purposes holds ADSs or ordinary shares, the tax treatment of a partner or member will generally depend on the status of the partner or member and the activities of the partnership or such limited liability company. A partner of a partnership or a member of such a limited liability company holding ADSs or ordinary shares is urged to consult its tax advisors regarding an investment in our ADSs or ordinary shares.

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ADSs. In general, for U.S. federal income tax purposes, a U.S. Holder of ADSs will be treated as the owner of the underlying ordinary shares that are represented by such ADSs. Deposits and withdrawals of ordinary shares in exchange for ADSs will not be subject to U.S. federal income taxation.

Distributions on ADSs or ordinary shares. Unless the passive foreign investment company rules, as discussed below, apply, the gross amount of the distributions in respect of the ADSs or ordinary shares will be subject to tax as dividend income to the extent of our current and accumulated earnings and profits, as determined under U.S. federal income tax principles. Subject to certain limitations, dividends paid to non-corporate U.S. Holders, including individuals, may be eligible for a reduced rate of taxation if we are deemed to be a “qualified foreign corporation” for U.S. federal income tax purposes, provided that such holder satisfies certain holding period requirements with respect to the ownership of our ADSs or ordinary shares. Subject to the exceptions discussed below, a corporation is a qualified foreign corporation if it is:

The Cayman Islands is not a party to any double tax treaty with the United States. A foreign corporation (even if it is described above) does not constitute a qualified foreign corporation if, for the taxable year in which the dividend is paid or the preceding taxable year, the foreign corporation is or was a passive foreign investment company. Although we believe that we are a qualified foreign corporation because the ADSs will be traded on an established U.S. securities market and, as discussed below, we believe that we were not a passive foreign investment company for our 2023 tax year, no assurance can be given in this regard. In addition, our status as a qualified foreign corporation may change. A U.S. Holder that exchanges its ADSs for ordinary shares may not be eligible for the reduced rate of taxation on dividends if the ordinary shares are not deemed to be readily tradable on an established securities market within the United States.

Dividends will be includable in a U.S. Holder’s gross income on the date actually or constructively received by the Depositary Bank, in the case of ADSs or, in the case of ordinary shares, by such U.S. Holder. These dividends will not be eligible for the dividends-received deduction generally allowed to U.S. corporations in respect of dividends received from other U.S. corporations.

To the extent we pay dividends on the ADSs or ordinary shares in a currency other than the U.S. dollar, the U.S. dollar value of such dividends should be calculated by reference to the exchange rate prevailing on the date of actual or constructive receipt of the dividend, regardless of whether the foreign currency is converted into U.S. dollars at that time. If the foreign currency is converted into U.S. dollars on the date of actual or constructive receipt of such dividends, the tax basis of the U.S. Holder in such foreign currency will be equal to its U.S. dollar value on that date and, as a result, the U.S. Holder generally should not be required to recognize any foreign currency exchange gain or loss. Dividends paid in respect of the ADSs or ordinary shares generally will be treated as income from sources outside the United States.

To the extent that the amount of any distribution exceeds our current and accumulated earnings and profits, the distribution will first be treated as a tax-free return of capital, causing a reduction in the adjusted basis of the ADSs or ordinary shares, and the balance in excess of adjusted basis will be taxed as capital gain.

Sale, exchange or other disposition of ADSs or ordinary shares. Unless the passive foreign investment company rules, as discussed below, apply, upon the sale, exchange or other disposition of ADSs or ordinary shares a U.S. Holder generally will recognize capital gain or loss equal to the difference between the amount realized upon the sale, exchange or other disposition and the adjusted tax basis of the U.S. Holder in the ADSs or ordinary shares. The capital gain or loss generally will be long-term capital gain or loss if, at the time of sale, exchange or other disposition, the U.S. Holder has held the ADS or ordinary share for more than one year. Net

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long-term capital gains of non-corporate U.S. Holders, including individuals, are generally eligible for preferential rates of taxation. The deductibility of capital losses is subject to limitations. Any gain or loss that a U.S. Holder recognizes generally will be treated as gain or loss from sources within the United States for U.S. foreign tax credit limitation purposes.

Additional tax on net investment income. An additional 3.8% federal income tax may be assessed on net investment income (including dividends, other distributions, and gain realized on the sale of ADSs or ordinary shares) earned by certain U.S. Holders. This tax does not apply to U.S. Holders who hold ADSs or ordinary shares in the ordinary course of certain trades or businesses.

Passive foreign investment company rules. In general, we will be classified as a passive foreign investment company for any taxable year in which either (a) at least 75% of our gross income is passive income or (b) at least 50% of the value (determined on the basis of a quarterly average) of our assets is attributable to assets that produce or are held for the production of passive income. For this purpose, passive income generally includes dividends, interest, royalties, rents (other than rents and royalties derived in the active conduct of a trade or business and not derived from a related person), annuities and gains from assets that produce passive income. If we own directly or indirectly at least 25% by value of the equity shares of another corporation, we will be treated for purposes of the passive foreign investment company tests as owning a proportionate share of the assets of the other corporation, and as receiving directly a proportionate share of the other corporation’s income.

We believe, based on our present and projected composition of our income and valuation of our assets, we were not classified as a passive foreign investment company for U.S. federal income tax purposes for our 2023 tax year, although no assurance can be given in this regard. Whether we are a passive foreign investment company for any particular taxable year is determined on an annual basis and will depend on the composition of our income and assets, including goodwill. The calculation of goodwill will be based, in part, on the then market value of our capital stock, which is subject to fluctuation. Accordingly, there can be no assurance that we will not be classified as a passive foreign investment company in the current or any future taxable year.

If we are a passive foreign investment company for any taxable year during which a U.S. Holder has an equity interest in our company, then the company will continue to be treated as a passive foreign investment company with respect to such U.S. Holder for all succeeding taxable years during which the hold ADS or ordinary shares in the company. Accordingly, unless the U.S. Holder makes a mark-to-market election as discussed below, such U.S. Holder will be subject to special tax rules in any future taxable year regardless of whether we are classified as a passive foreign investment company in such future years with respect to (a) “excess distributions” and (b) gain from the disposition of stock. Excess distributions are defined generally as the excess of the amount received with respect to the equity interests in the taxable year over 125% of the average annual distributions received in the shorter of either the three previous years or a U.S. Holder’s holding period before the taxable year and must be allocated ratably to each day of the U.S. Holder’s holding period. The amount allocated to the current taxable year or any year before we became a passive foreign investment company will be included as ordinary income in a U.S. Holder’s gross income for that year. The amount allocated to other prior taxable years will be taxed as ordinary income at the highest rate in effect for a U.S. Holder in that prior year and the tax is subject to an interest charge at the rate applicable to deficiencies in income taxes. The entire amount of any gain realized upon the sale or other disposition of the equity interests will be treated as an excess distribution made in the year of sale or other disposition and as a consequence will be treated as ordinary income and, to the extent allocated to years prior to the year of sale or disposition with respect to which we were a passive foreign investment company, will be subject to the interest charge described above.

In certain circumstances, instead of being subject to the excess distribution rules discussed above, a U.S. Holder may make an election to include gain on the ADSs or ordinary shares of a passive foreign investment company as ordinary income under a mark-to-market method, provided that the ADSs or ordinary shares are regularly traded on a qualified exchange. Under current law, the mark-to-market election is only available for ADSs or ordinary shares that are regularly traded within the meaning of U.S. Treasury regulations

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on certain designated U.S. exchanges and foreign exchanges that meet trading, listing, financial disclosure and other requirements to be treated as a qualified exchange under applicable U.S. Treasury regulations. The Nasdaq Stock Market is a qualified exchange. The ordinary shares may not be eligible for mark-to-market treatment under the foregoing rule even if the ADSs otherwise satisfy the applicable requirement.

If a U.S. Holder makes a mark-to-market election, the U.S. Holder will include each year as ordinary income, rather than capital gain, the excess, if any, of the fair market value of the U.S. Holder’s ADSs or ordinary shares at the end of the taxable year over such U.S. Holder’s adjusted basis in the ADSs (or ordinary shares, if applicable) and will be permitted an ordinary loss in respect of the excess, if any, of the adjusted basis of these ADSs or ordinary shares over their fair market value at the end of the taxable year, but only to the extent of the net amount previously included in income as a result of the mark-to-market election. A U.S. Holder’s basis in the ADSs or ordinary shares will be adjusted to reflect any such income or loss amounts. Any gain or loss on the sale of the ADSs or ordinary shares will be ordinary income or loss, except that this loss will be ordinary loss only to the extent of the previously included net mark-to-market gain.

If we are treated as a passive foreign investment company with respect to a U.S. Holder then, under certain circumstances such U.S. Holder must file a Internal Revenue Service Form 8621 for their interest in the Company.

A U.S. Holder is urged to consult its tax advisor concerning the U.S. federal income tax consequences of an investment in our ADSs or ordinary shares if we are or become a passive foreign investment company, including the possibility of making a mark-to-market election.

Information Reporting and Back-up Withholding. The Foreign Account Tax Compliance Act (“FATCA”) generally requires that individuals that hold certain specified foreign financial assets worth in excess of certain thresholds of US$50,000 or more, depending on the individual’s circumstances, report such ownership to the IRS using IRS Form 8938. The definition of specified foreign financial assets includes not only financial accounts maintained in foreign financial institutions, but also, unless held in accounts maintained by a financial institution, any stock or security issued by a non-U.S. person, any financial instrument or contract held for investment that has an issuer or counterparty other than a U.S. person and any interest in a foreign entity. A U.S. Holder may be subject to this reporting requirement unless such holder’s ADSs or ordinary shares are held in an account at a domestic financial institution. The penalty for failing to file Form 8938 is substantial.

U.S. holders generally are subject to information reporting requirements with respect to dividends on, or proceeds from the disposition of, our ordinary shares. In addition, a U.S. holder may be subject, under certain circumstances, to backup withholding at a rate of up to 24% with respect to dividends paid on, or proceeds from the disposition of, our ordinary shares unless the U.S. holder provides proof of an applicable exemption or correct taxpayer identification number, and otherwise complies with the applicable requirements of the backup withholding rules. A U.S. holder of our ordinary shares who provides an incorrect taxpayer identification number may be subject to penalties imposed by the IRS. Amounts withheld under the backup withholding rules are not an additional tax and may be refunded or credited against the U.S. holder’s U.S. federal income tax liability, provided the required information is timely furnished to the IRS.

Cayman Islands Taxation

The Cayman Islands currently levy no taxes on individuals or corporations based upon profits, income, gains or appreciation and there is no taxation in the nature of inheritance tax or estate duty. There are no other taxes likely to be material to our company levied by the Government of the Cayman Islands except for stamp duties that may be applicable on instruments executed in, or after execution brought within the jurisdiction of, the Cayman Islands. The Cayman Islands are a party to a double tax treaty entered into with the United Kingdom in 2010 but otherwise is not party to any double tax treaties. No stamp duty is payable in the Cayman Islands on transfers of shares of Cayman Islands companies, except those which hold interests in land in the Cayman Islands. There are no exchange control regulations or currency restrictions in the Cayman Islands.

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We have, pursuant to the Tax Concessions Act of the Cayman Islands, obtained an undertaking from the Governor-in-Council that:

The undertaking that we have obtained is for a period of 20 years from March 1, 2005.

The Cayman Islands, together with several other non-European Union jurisdictions, have introduced legislation aimed at addressing concerns raised by the Council of the European Union as to offshore structures engaged in certain activities which attract profits without real economic activity. With effect from January 1, 2019, the International Tax Co-operation (Economic Substance) Act (As Revised) (the “Substance Act”) came into force in the Cayman Islands introducing certain economic substance requirements for in-scope Cayman Islands entities which are engaged in certain “relevant activities,” which in the case of exempted companies incorporated before January 1, 2019, will apply in respect of financial years commencing July 1, 2019, onwards. As our company is a Cayman Islands company, compliance obligations include filing annual notifications, which need to state whether our company is carrying out any relevant activities and if so, whether our company has satisfied economic substance tests to the extent required under the Substance Act. As it is a new regime, it is anticipated that the Substance Act will evolve and be subject to further clarification and amendments. See “Risk Factor — The enactment of legislation implementing changes in the taxation of international business activities, the adoption of other tax reform policies or changes in tax legislation or policies could materially impact our financial position and results of operations” in Item 3 above.

Documents on Display

We have previously filed with the SEC our registration statement on Form F-6 under the Securities Act with respect to our ADSs.

All information filed with the SEC can be obtained over the internet at the SEC’s website at www.sec.gov. We are subject to the periodic reporting and other informational requirements of the Exchange Act. Under the Exchange Act, we are required to file reports and other information with the SEC. Specifically, we are required to file annually a Form 20-F no later than four months after the close of each fiscal year, which is December 31. As a foreign private issuer, we are exempt from the rules under the Exchange Act prescribing the furnishing and content of quarterly reports and proxy statements, and our officers, directors, and principal shareholders are exempt from the reporting and short-swing profit recovery provisions of Section 16 of the Exchange Act.

Interest rate risk. Our exposure to changes in interest rates is limited to interest income generated by our cash deposited with banks and short-term investments maintained in principal protected notes. We have not entered into any interest rate swap transactions. We do not believe that a 1% change in interest rates would have a significant impact on our operations.

Foreign currency risk. The majority of our revenue, cost of sales, accounts receivable, inventory and accounts payable are denominated in U.S. dollars. The majority of our operating expense relating to salaries and benefits and accounts payable related to these expenses are denominated in foreign currencies, primarily the NT dollar. Fluctuations in currency exchange rates could harm our business in the future. We do not utilize foreign exchange derivatives contracts to protect against changes in foreign exchange rates.

Also refer to “Risk Factors — Our business, financial condition and results of operations could be adversely impacted by the political and economic conditions of the countries in which we conduct business and operate” in Item 3 above.

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Investment Risk. We have minority stake equity investments in Cashido, Vastview, Kinara and BIWIN, companies related to the semiconductor and other technology industries. These investments, with the exception of BIWIN, are privately-held companies accounted for under the measurement alternative method. This is because our ownership is less than 20%, and we do not have the ability to exercise significant influence over the operations of these companies. As of December 31, 2022 and 2023, these investments in privately-held companies had a carrying value of US$6.5 million and US$6.5 million, respectively. BIWIN was listed to the Science and Technology Innovation Board of Shanghai Stock Exchange in December 2022, and we had an unrealized holding gain of US$896 thousand and 8.0 million in 2022 and 2023, respectively. Based on a sensitivity analysis performed as of December 31, 2022 and 2023, a hypothetical adverse price change of 10% would have decreased our non-operating income by approximately US$0.3 million and US$1.1 million in 2022 and 2023, respectively. We monitor these investments for impairment and make appropriate reductions in carrying value when an impairment is deemed to be other than temporary. There were no impairments losses for the years ended on December 31, 2021, 2022 and 2023.

Fees and Charges by ADS Holders. The following table summarizes the fees and charges that holders of our ADSs, which are evidenced by the ADRs, may have to pay to the Depositary Bank pursuant to the ADS deposit agreement: