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    SEC Form 10-Q filed by Zai Lab Limited

    5/8/24 4:14:51 PM ET
    $ZLAB
    Biotechnology: Pharmaceutical Preparations
    Health Care
    Get the next $ZLAB alert in real time by email
    zlab-20240331
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    UNITED STATES
    SECURITIES AND EXCHANGE COMMISSION
    WASHINGTON, DC 20549
    ____________________
    FORM 10-Q
    ____________________
    (Mark One)
    xQUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934
    For the quarterly period ended March 31, 2024
    OR
    oTRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934
    For the transition period from ______ to ______
    Commission File Number: 001-38205
    ____________________
    Zai Lab logo.jpg
    ZAI LAB LIMITED
    (Exact Name of Registrant as Specified in its Charter)
    ____________________
    Cayman Islands98-1144595
    (State or Other Jurisdiction of
    Incorporation or Organization)
    (I.R.S. Employer
    Identification No.)
    4560 Jinke Road
    Bldg. 1, Fourth Floor, Pudong
    Shanghai
    China
    201210
    314 Main Street
    4th Floor, Suite 100
    Cambridge, MA, USA
    02142
    (Address of Principal Executive Offices)(Zip Code)
    +86 216163 2588
    +1 857 706 2604
    (Registrant’s Telephone Number, Including Area Code)
    ____________________
    Securities registered pursuant to Section 12(b) of the Act:
    Title of each class
    Trading
    Symbol(s)
    Name of each exchange
    on which registered
    American Depositary Shares, each representing 10 Ordinary Shares, par value $0.000006 per shareZLABThe Nasdaq Global Market
    Ordinary Shares, par value $0.000006 per share*
    9688The Stock Exchange of Hong Kong Limited
    *Included in connection with the registration of the American Depositary Shares with the Securities and Exchange Commission. The ordinary shares are not registered or listed for trading in the United States but are listed for trading on The Stock Exchange of Hong Kong Limited.
    Indicate by check mark whether the registrant (1) has filed all reports required to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during the preceding 12 months (or for such shorter period that the registrant was required to file such reports), and (2) has been subject to such filing requirements for the past 90 days. Yes ☒ No ☐
    Indicate by check mark whether the registrant has submitted electronically every Interactive Data File required to be submitted pursuant to Rule 405 of Regulation S-T (§ 232.405 of this chapter) during the preceding 12 months (or for such shorter period that the registrant was required to submit such files). Yes ☒ No ☐
    Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, a smaller reporting company, or an emerging growth company. See the definitions of “large accelerated filer,” “accelerated filer,” “smaller reporting company,” and “emerging growth company” in Rule 12b-2 of the Exchange Act.
    Large accelerated filer
    x
    Accelerated filer
    o
    Non-accelerated filer
    o
    Smaller reporting company
    o
    Emerging growth company
    o
    If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. ☐
    Indicate by check mark whether the registrant is a shell company (as defined in Rule 12b-2 of the Exchange Act). Yes ☐ No ☒
    As of May 2, 2024, 992,087,430 ordinary shares of the registrant, par value $0.000006 per share, were outstanding, of which 758,101,320 ordinary shares were held in the form of American Depositary Shares.


    Table of Contents
    Zai Lab Limited
    Quarterly Report on Form 10-Q
    For the First Quarter of 2024

    Page
    PART I.
    FINANCIAL INFORMATION
    2
    Item 1.
    Financial Statements (Unaudited)
    2
    Condensed Consolidated Balance Sheets as of March 31, 2024 and December 31, 2023
    2
    Condensed Consolidated Statements of Operations for the Three Months Ended March 31, 2024 and 2023
    3
    Condensed Consolidated Statements of Comprehensive Loss for the Three Months Ended March 31, 2024 and 2023
    4
    Condensed Consolidated Statements of Shareholders’ Equity for the Three Months Ended March 31, 2024 and 2023
    5
    Condensed Consolidated Statements of Cash Flows for the Three Months Ended March 31, 2024 and 2023
    6
    Notes to the Unaudited Condensed Consolidated Financial Statements
    7
    Item 2.
    Management’s Discussion and Analysis of Financial Condition and Results of Operations
    14
    Item 3.
    Quantitative and Qualitative Disclosures about Market Risk
    23
    Item 4.
    Controls and Procedures
    24
    PART II.
    OTHER INFORMATION
    25
    Item 1.
    Legal Proceedings
    25
    Item 1A.
    Risk Factors
    25
    Item 2.
    Unregistered Sales of Equity Securities and Use of Proceeds
    25
    Item 3.
    Defaults upon Senior Securities
    25
    Item 4.
    Mine Safety Disclosures
    25
    Item 5.
    Other Information
    25
    Item 6.
    Exhibits
    26
    Signatures
    27



    SPECIAL NOTES REGARDING THE COMPANY
    Forward-Looking Statements
    This report contains certain forward-looking statements, including statements relating to our strategy and plans; potential of and expectations for our business, commercial products, and pipeline programs; the market for our commercial and pipeline products; capital allocation and investment strategy; clinical development programs and related clinical trials; clinical trial data, data readouts, and presentations; risks and uncertainties associated with drug development and commercialization; regulatory discussions, submissions, filings, and approvals and the timing thereof; the potential benefits, safety, and efficacy of our products and product candidates and those of our collaboration partners; the anticipated benefits and potential of investments, collaborations, and business development activities; our profitability and timeline to profitability; and our future financial and operating results. All statements, other than statements of historical fact, included in this report are forward-looking statements, and can be identified by words such as “aim,” “anticipate,” “believe,” “contemplate,” “continue,” “could,” “estimate,” “expect,” “forecast,” “goal,” “intend,” “may,” “plan,” “possible,” “potential,” “predict,” “project,” “seek,” “should,” “target,” “will,” “would,” or the negative of these terms or similar expressions. Such statements constitute forward-looking statements within the meaning of the Private Securities Litigation Reform Act of 1995. Forward-looking statements are not guarantees or assurances of future performance. Forward-looking statements are based on our expectations and assumptions as of the date of this report and are subject to inherent uncertainties, risks, and changes in circumstances that may differ materially from those contemplated by the forward-looking statements. We may not actually achieve the plans, carry out the intentions, or meet the expectations or projections disclosed in our forward-looking statements, and you should not place undue reliance on these forward-looking statements. Actual results may differ materially from those indicated by such forward-looking statements as a result of various important factors, including but not limited to the following:
    •    Our ability to successfully commercialize and generate revenue from our approved products;
    •    Our ability to obtain funding for our operations and business initiatives;
    •    The results of our clinical and pre-clinical development of our product candidates;
    •    The content and timing of decisions made by the relevant regulatory authorities regarding regulatory approvals of our product candidates;
    •    Changes in U.S. and China trade policies and relations, as well as relations with other countries, and/or changes in regulations and/or sanctions;
    •    Actions the Chinese government may take to intervene in or influence our operations;
    •    Economic, political, and social conditions in mainland China, as well as governmental policies;
    •    Uncertainties in the Chinese legal system, including with respect to the anti-corruption enforcement efforts in China and the Counter-Espionage Law, the Data Security Law, the Cyber Security Law, the Cybersecurity Review Measures, the Personal Information Protection Law, the Regulation on the Administration of Human Genetic Resources, the Biosecurity Law, the Measures on Security Assessment of Cross-Border Data Transfer (the “Security Assessment Measures”), and other future laws and regulations or amendments to such laws and regulations;
    •    Approval, filing, or procedural requirements imposed by the China Securities Regulatory Commission or other Chinese regulatory authorities in connection with issuing securities to foreign investors under Chinese law;
    •    Any violation or liability under the U.S. Foreign Corrupt Practices Act (“FCPA”) or Chinese anti-corruption laws;
    •    Restrictions on currency exchange;
    •    Limitations on the ability of our Chinese subsidiaries to make payments to us;
    •    Chinese requirements on the ability of residents in mainland China to establish offshore special purpose companies;
    •    Chinese regulations regarding acquisitions of companies based in mainland China by foreign investors;
    •    Any issues that our Chinese manufacturing facilities may have with operating in conformity with established Good Manufacturing Practices (“GMPs”) and international best practices, and with passing U.S. Food and Drug Administration (“FDA”), China National Medical Products Administration (“NMPA”), and European Medicines Agency (“EMA”) inspections;



    •    Expiration of, or changes to, financial incentives or discretionary policies granted by local governments in mainland China;
    •    Restrictions or limitations on the ability of overseas regulators to conduct investigations or collect evidence within mainland China;
    •    Business disruptions caused by pandemics such as COVID-19, international war or conflict such as the Russia/Ukraine and Israel/Hamas wars, natural disasters, extreme weather events, and other significant disruptions outside of our control;
    •    Unfavorable tax consequences to us and our non-Chinese shareholders or American Depositary Share (“ADS”) holders if we were to be classified as a Chinese resident enterprise for Chinese income tax purposes;
    •    Failure to comply with applicable Chinese, U.S., and Hong Kong regulations that could lead to government enforcement actions, fines, other legal or administrative sanctions, and/or harm to our business or reputation;
    •    Review by the U.S. Committee on Foreign Investment (“CFIUS”) in our investments or other delays or obstacles for closing transactions;
    •    Any inability to renew our current leases on desirable terms or otherwise locate desirable alternatives for our leased properties;
    •    Any inability of third parties on whom we rely to conduct our pre-clinical and clinical trials to successfully carry out their contractual duties or meet expected deadlines; and
    •    Any inability to obtain or maintain sufficient patent protection for our products and product candidates.
    These factors should not be construed as exhaustive and should be read with the other cautionary statements and information in our Annual Report on Form 10-K for the year ended December 31, 2023 (the “2023 Annual Report”), and this report. Forward-looking statements are based on our management’s beliefs and assumptions and information currently available to our management. These statements, like all statements in this report, speak only as of their date. We anticipate that subsequent events and developments will cause our expectations and assumptions to change, and we undertake no obligation to update or revise any forward-looking statements, whether as a result of new information, future events, or otherwise, except as may be required by law. These forward-looking statements should not be relied upon as representing our views as of any date subsequent to the date of this report.
    Usage of Terms
    Unless the context requires otherwise, references in this report to “Greater China” refer to mainland China, Hong Kong Special Administrative Region (“Hong Kong” or “HK”), Macau Special Administrative Region (“Macau”), and Taiwan, collectively; references to “Zai Lab,” the “Company,” “we,” “us,” and “our” refer to Zai Lab Limited, a holding company, and its subsidiaries, on a consolidated basis; and references to “Zai Lab Limited” refer to Zai Lab Limited, a holding company. Zai Lab Limited is the entity in which investors hold their interest.
    Our operating subsidiaries consist of Zai Lab (Hong Kong) Limited, domiciled in Hong Kong; Zai Auto Immune (Hong Kong) Limited, domiciled in Hong Kong; Zai Anti Infectives (Hong Kong) Limited, domiciled in Hong Kong; Zai Lab (Shanghai) Co., Ltd., domiciled in mainland China; Zai Lab International Trading (Shanghai) Co., Ltd., domiciled in mainland China; Zai Lab (Suzhou) Co., Ltd., domiciled in mainland China; Zai Biopharmaceutical (Suzhou) Co., Ltd., domiciled in mainland China; Zai Lab Trading (Suzhou) Co., Ltd., domiciled in mainland China; Zai Lab (Taiwan) Limited, domiciled in Taiwan; Zai Lab (AUST) Pty. Ltd., domiciled in Australia; and Zai Lab (US) LLC, domiciled in the United States. As of the date of this report, Zai Anti Infectives (Hong Kong) Limited has non-substantial business operations.
    We own various trademarks, including various forms of the Zai Lab brand (in English and Chinese), as well as several domain names that incorporate such trademarks. Trademarks and trade names of other companies appearing in this report are the property of their respective holders. Solely for convenience, some of the trademarks and trade names in this report are referred to without the ® and ™ symbols, but such references should not be construed as any indicator that their respective owners will not assert, to the fullest extent under applicable law, their rights thereto. We do not intend our use or display of other companies’ trademarks and trade names to imply a relationship with, or endorsement or sponsorship of, any other company.



    PART I – FINANCIAL INFORMATION
    The following discussion and analysis of our financial condition and results of operations should be read in conjunction with the unaudited condensed consolidated financial statements and the accompanying notes included in this report and the audited consolidated financial information and the accompanying notes included in our 2023 Annual Report.
    1


    Item 1. Financial Statements.
    Zai Lab Limited
    Unaudited Condensed Consolidated Balance Sheets
    (in thousands of U.S. dollars (“$”), except for number of shares and per share data)
    NotesMarch 31,
    2024
    December 31,
    2023
    Assets
    Current assets
    Cash and cash equivalents3650,780 790,151 
    Restricted cash, current100,000 — 
    Short-term investments— 16,300 
    Accounts receivable (net of allowance for credit losses of $18 and $17 as of March 31, 2024 and December 31, 2023, respectively)
    60,422 59,199 
    Notes receivable15,363 6,134 
    Inventories, net437,851 44,827 
    Prepayments and other current assets24,224 22,995 
    Total current assets888,640 939,606 
    Restricted cash, non-current1,114 1,113 
    Long term investments 14,109 9,220 
    Prepayments for equipment89 111 
    Property and equipment, net552,386 53,734 
    Operating lease right-of-use assets15,187 14,844 
    Land use rights, net3,034 3,069 
    Intangible assets, net12,398 13,389 
    Long-term deposits1,480 1,209 
    Total assets988,437 1,036,295 
    Liabilities and shareholders’ equity  
    Current liabilities  
    Accounts payable88,121 112,991 
    Current operating lease liabilities7,536 7,104 
    Short-term debts948,273 — 
    Other current liabilities1048,176 82,972 
    Total current liabilities192,106 203,067 
    Deferred income26,297 28,738 
    Non-current operating lease liabilities7,540 8,047 
    Other non-current liabilities325 325 
    Total liabilities226,268 240,177 
    Commitments and contingencies (Note 15)  
    Shareholders’ equity  
    Ordinary shares (par value of $0.000006 per share; 5,000,000,000 shares authorized; 978,197,710 and 977,151,270 shares issued as of March 31, 2024 and December 31, 2023, respectively; 973,285,510 and 972,239,070 shares outstanding as of March 31, 2024 and December 31, 2023, respectively)
    6 6 
    Additional paid-in capital2,993,282 2,975,302 
    Accumulated deficit(2,249,451)(2,195,980)
    Accumulated other comprehensive income39,168 37,626 
    Treasury Stock (at cost, 4,912,200 shares as of both March 31, 2024 and December 31, 2023)
    (20,836)(20,836)
    Total shareholders’ equity762,169 796,118 
    Total liabilities and shareholders’ equity988,437 1,036,295 
    The accompanying notes are an integral part of these unaudited condensed consolidated financial statements.
    2


    Zai Lab Limited
    Unaudited Condensed Consolidated Statements of Operations
    (in thousands of $, except for number of shares and per share data)
    Three Months Ended March 31,
    Notes20242023
    Revenue687,149 62,797 
    Expenses
    Cost of sales(33,619)(21,337)
    Research and development(54,645)(48,472)
    Selling, general, and administrative(69,194)(62,510)
    Loss from operations(70,309)(69,522)
    Interest income9,658 10,232 
    Interest expenses(113)— 
    Foreign currency (losses) gains(2,068)8,912 
    Other income, net139,361 1,234 
    Loss before income tax (53,471)(49,144)
    Income tax expense7— — 
    Net loss(53,471)(49,144)
    Loss per share - basic and diluted8(0.05)(0.05)
    Weighted-average shares used in calculating net loss per ordinary share - basic and diluted 973,145,760 961,444,780 
    The accompanying notes are an integral part of these unaudited condensed consolidated financial statements.
    3


    Zai Lab Limited
    Unaudited Condensed Consolidated Statements of Comprehensive Loss
    (in thousands of $)

    Three Months Ended March 31,
    20242023
    Net loss(53,471)(49,144)
    Other comprehensive income, net of tax of nil:
    Foreign currency translation adjustments1,542 (8,413)
    Comprehensive loss(51,929)(57,557)
    The accompanying notes are an integral part of these unaudited condensed consolidated financial statements.
    4


    Zai Lab Limited
    Unaudited Condensed Consolidated Statements of Shareholders’ Equity
    (in thousands of $, except for number of shares)

    Ordinary SharesAdditional
    paid
    in capital
    Accumulated
    deficit
    Accumulated
    other
    comprehensive
    income (loss)
    Treasury StockTotal
    Number
    of
    Shares
    AmountSharesAmount
    Balance at December 31, 2023977,151,270 6 2,975,302 (2,195,980)37,626 (4,912,200)(20,836)796,118 
    Issuance of ordinary shares upon vesting of restricted shares1,046,440 00— — — — — 
    Share-based compensation— — 17,980 — — — — 17,980 
    Net loss— — — (53,471)— — — (53,471)
    Foreign currency translation— — — — 1,542 — — 1,542 
    Balance at March 31, 2024978,197,710 6 2,993,282 (2,249,451)39,168 (4,912,200)(20,836)762,169 

    Balance at December 31, 2022962,455,850 6 2,893,120 (1,861,360)25,685 (2,236,280)(11,856)1,045,595 
    Issuance of ordinary shares upon vesting of restricted shares732,040 00— — — — — 
    Exercise of share options4,009,460 01,673 — — — — 1,673 
    Receipt of shares netted to satisfy tax withholding obligations related to share-based compensation— — — — — (1,272,330)(5,130)(5,130)
    Share-based compensation— — 16,661 — — — — 16,661 
    Net loss— — — (49,144)— — — (49,144)
    Foreign currency translation— — — — (8,413)— — (8,413)
    Balance at March 31, 2023967,197,350 6 2,911,454 (1,910,504)17,272 (3,508,610)(16,986)1,001,242 
    The accompanying notes are an integral part of these unaudited condensed consolidated financial statements. “0” in above table means less than 1,000 dollars.
    5


    Zai Lab Limited
    Unaudited Condensed Consolidated Statements of Cash Flows
    (in thousands of $)
    Three Months Ended
    March 31,
    20242023
    Cash flows from operating activities
    Net loss(53,471)(49,144)
    Adjustments to reconcile net loss to net cash used in operating activities:  
    Allowance for credit losses1 1 
    Inventory write-down37 377 
    Depreciation and amortization expenses3,012 2,657 
    Amortization of deferred income(840)(582)
    Share-based compensation17,980 16,661 
    Gain from fair value changes of equity investment with readily determinable fair value(4,889)(441)
    Losses on disposal of property and equipment407 64 
    Noncash lease expenses2,069 2,464 
    Debt issuance costs700 — 
    Foreign currency remeasurement impact2,068 (8,912)
    Changes in operating assets and liabilities:  
    Accounts receivable(1,328)(2,852)
    Notes receivable(9,239)(8,599)
    Inventories6,818 (6,686)
    Prepayments and other current assets(1,253)(6,470)
    Long-term deposits(271)72 
    Accounts payable(13,370)(327)
    Other current liabilities(34,204)(15,593)
    Operating lease liabilities(2,783)(2,141)
    Deferred income(1,550)9,839 
    Other non-current liabilities— 325 
    Net cash used in operating activities(90,106)(69,287)
    Cash flows from investing activities  
    Purchases of short-term investments— (100,000)
    Proceeds from maturity of short-term investment16,300 49,450 
    Purchases of property and equipment(974)(3,513)
    Proceeds from the sale of property and equipment— 112 
    Acquisition of intangible assets(12,034)(3)
    Net cash provided by (used in) investing activities3,292 (53,954)
    Cash flows from financing activities  
    Proceeds from short-term debts48,248 — 
    Payments of debt issuance costs(700)— 
    Proceeds from exercises of stock options— 1,197 
    Taxes paid related to settlement of equity awards— (5,083)
    Net cash provided by (used in) financing activities47,548 (3,886)
    Effect of foreign exchange rate changes on cash, cash equivalents and restricted cash(104)(1,299)
    Net decrease in cash, cash equivalents and restricted cash(39,370)(128,426)
    Cash, cash equivalents and restricted cash - beginning of period791,264 1,009,273 
    Cash, cash equivalents and restricted cash - end of period751,894 880,847 
    Supplemental disclosure on non-cash investing and financing activities  
    Payables for purchase of property and equipment2,481 4,232 
    Payables for acquisition of intangible assets78 268 
    Receivables for stock option exercise under equity incentive plans— 476 
    Right-of-use asset acquired under operating leases2,395 2,662 
    Receivables for disposal of property and equipment— 10 
    Supplemental disclosure of cash flow information  
    Cash paid for interest45 — 
    The accompanying notes are an integral part of these unaudited condensed consolidated financial statements.
    6


    Zai Lab Limited
    Notes to the unaudited condensed consolidated financial statements

    1. Organization and Principal Activities
    Zai Lab Limited was incorporated on March 28, 2013 in the Cayman Islands as an exempted company with limited liability under the Companies Act of the Cayman Islands (as amended). Zai Lab Limited and its subsidiaries (collectively referred to as the “Company”) are focused on discovering, developing, and commercializing products that address medical conditions with significant unmet needs in the areas of oncology, autoimmune disorders, infectious disease, and neuroscience.
    The Company’s principal operations and geographic markets are in Greater China. The Company has a substantial presence in Greater China and the United States.
    2. Basis of Presentation and Consolidation and Significant Accounting Policies
    (a) Basis of Presentation
    The accompanying unaudited condensed consolidated financial statements have been prepared in accordance with U.S. generally accepted accounting principles (“U.S. GAAP”), and applicable rules and regulations of the U.S. Securities and Exchange Commission (the “SEC”), regarding interim financial reporting. Certain information and note disclosures normally included in the financial statements prepared in accordance with U.S. GAAP have been condensed or omitted pursuant to such rules and regulations. As such, the information included in this report should be read in conjunction with the consolidated financial statements and accompanying notes included in the Annual Report on Form 10-K for the year ended December 31, 2023 (the “2023 Annual Report”). The December 31, 2023 condensed consolidated balance sheet data included in this report were derived from the audited financial statements in the 2023 Annual Report.
    The accompanying condensed consolidated financial statements reflect all normal recurring adjustments that are necessary to present fairly the results for the interim periods presented. Interim results are not necessarily indicative of the results for the year ending December 31, 2024.
    (b) Principles of Consolidation
    The unaudited condensed consolidated financial statements include the accounts of Zai Lab Limited and its subsidiaries, which are wholly owned. All intercompany transactions and balances are eliminated upon consolidation.
    (c) Use of Estimates
    The preparation of the unaudited condensed consolidated financial statements in conformity with U.S. GAAP requires management to make estimates, judgments, and assumptions that affect the reported amounts of assets and liabilities and disclosures of contingent assets and liabilities at the date of the financial statements and the reported amounts of revenues and expenses during the period. Areas where management uses subjective judgment include, but are not limited to, accrual of rebates, recognition of research and development expenses, fair value of share-based compensation expenses, and recoverability of deferred tax assets. These estimates, judgments, and assumptions can affect the reported amounts of assets and liabilities as of the date of the financial statements as well as the reported amounts of revenues and expenses during the periods presented. Actual results could differ from these estimates.
    7


    Zai Lab Limited
    Notes to the unaudited condensed consolidated financial statements
    (d) Fair Value Measurements
    Equity investments with readily determinable fair value are measured using level 1 inputs and were $14.1 million and $9.2 million as of March 31, 2024 and December 31, 2023, respectively. The unrealized gains from fair value changes are recognized in other income, net in the condensed consolidated statements of operations.
    Financial instruments of the Company primarily include cash and cash equivalents, current restricted cash, short-term investments, accounts receivable, notes receivable, prepayments and other current assets, non-current restricted cash, accounts payable, short-term debts, and other current liabilities. As of March 31, 2024 and December 31, 2023, the carrying values of cash and cash equivalents, current restricted cash, short-term investments, accounts receivable, prepayments and other current assets, accounts payable, short-term debts, and other current liabilities approximated their fair values due to the short-term maturity of these instruments, and the carrying value of notes receivable and non-current restricted cash approximated their fair value based on the assessment of the ability to recover these amounts.
    (e) Recent Accounting Pronouncements
    In November 2023, the Financial Accounting Standards Board (“FASB”) issued ASU No. 2023-07, Improvements to Reportable Segment Disclosures (Topic 280). This ASU requires all public entities, including public entities with a single reportable segment, to disclose the title and position of the Chief Operating Decision Maker (“CODM”) and the significant segment expenses and any additional measures of a segment’s profit or loss used by the CODM to allocate resources and assess performance. This ASU is effective on a retrospective basis for fiscal years beginning after December 15, 2023 and for interim periods beginning after December 15, 2024. Early adoption is permitted. The Company is currently evaluating the impact of this ASU and expects to adopt it for the year ending December 31, 2024.
    In December 2023, the FASB issued ASU No. 2023-09, Improvements to Income Tax Disclosures (Topic 740). This ASU requires disaggregated information about a reporting entity’s effective tax rate reconciliation as well as additional information on income taxes paid. This ASU is effective on a prospective basis for annual periods beginning after December 15, 2024. Early adoption is permitted. This ASU will result in additional disclosure in the consolidated financial statements, once adopted. The Company is currently evaluating the impact of this ASU and expects to adopt it for the year ending December 31, 2025.
    The Company did not adopt any new accounting standards in the first quarter of 2024 that had a material impact on the Consolidated Financial Statements. For additional information on the Company’s significant accounting policies, refer to the notes to the consolidated financial statements in the 2023 Annual Report.
    8


    Zai Lab Limited
    Notes to the unaudited condensed consolidated financial statements
    3. Cash and Cash Equivalents
    The following table presents the Company’s cash and cash equivalents ($ in thousands):
    March 31, 2024December 31, 2023
    Cash 649,666 789,051 
    Cash equivalents (i)1,114 1,100 
     650,780 790,151 
    Denominated in:  
    US$630,583 762,436 
    Renminbi (“RMB”) (ii)17,878 25,093 
    Hong Kong dollar (“HK$”)1,513 1,974 
    Australian dollar (“A$”)557 587 
    Taiwan dollar (“TW$”)249 61 
    650,780 790,151 
    (i)Cash equivalents represent short-term and highly liquid investments in a money market fund.
    (ii)Certain cash and bank balances denominated in RMB were deposited with banks in mainland China. The conversion of these RMB-denominated balances into foreign currencies is subject to the rules and regulations of foreign exchange control promulgated by the Chinese government.
    4. Inventories, Net
    The following table presents the Company’s inventories, net ($ in thousands):
    March 31, 2024December 31, 2023
    Finished goods19,076 22,702 
    Raw materials16,675 17,655 
    Work in progress2,100 4,470 
    Inventories, net37,851 44,827 
    The Company writes down inventory for any excess or obsolete inventories or when the Company believes that the net realizable value of inventories is less than the carrying value. The Company recorded write-downs in inventory, which were included in cost of sales, of insignificant amount and $0.4 million in the first quarter of 2024 and 2023, respectively.
    9


    Zai Lab Limited
    Notes to the unaudited condensed consolidated financial statements
    5. Property and Equipment, Net
    The following table presents the components of the Company’s property and equipment, net ($ in thousands):
    March 31, 2024December 31, 2023
    Office equipment1,046 1,047 
    Electronic equipment9,315 9,161 
    Vehicle198 199 
    Laboratory equipment20,162 20,140 
    Manufacturing equipment17,658 17,680 
    Leasehold improvements11,361 11,371 
    Construction in progress24,834 24,272 
    84,574 83,870 
    Less: accumulated depreciation(32,188)(30,136)
    Property and equipment, net52,386 53,734 
    Depreciation expense was $2.2 million and $2.5 million in the first quarter of 2024 and 2023, respectively.
    6. Revenue
    The Company’s revenue is derived from the sales of its commercial products primarily in mainland China. The table below presents the Company’s gross and net product revenue ($ in thousands):
    Three Months Ended March 31,
    20242023
    Product revenue - gross93,112 71,212 
    Less: Rebates and sales returns(5,963)(8,415)
    Product revenue - net87,149 62,797 
    Sales rebates are offered to distributors in mainland China, and the amounts are recorded as a reduction of revenue. Estimated rebates are determined based on contracted rates, sales volumes, and level of distributor inventories.
    The following table presents the Company’s net revenue by product ($ in thousands):
    Three Months Ended March 31,
    20242023
    ZEJULA45,501 42,680 
    OPTUNE12,480 13,342 
    QINLOCK6,093 1,306 
    NUZYRA9,913 5,469 
    VYVGART 13,162 — 
    Product revenue - net87,149 62,797 
    10


    Zai Lab Limited
    Notes to the unaudited condensed consolidated financial statements
    7. Income Tax
    No provision for income taxes has been required to be accrued because the Company is in a cumulative loss position for the periods presented.
    The Company recorded a full valuation allowance against deferred tax assets of all its consolidated entities because all entities were in a cumulative loss position as of March 31, 2024 and December 31, 2023. No unrecognized tax benefits and related interest and penalties were recorded in the periods presented.
    8. Loss Per Share
    The following table presents the computation of the basic and diluted net loss per share ($ in thousands, except share and per share data):
    Three Months Ended March 31,
    20242023
    Numerator:
    Net loss (53,471)(49,144)
    Denominator:
    Weighted average number of ordinary shares - basic and diluted973,145,760 961,444,780 
    Net loss per share - basic and diluted(0.05)(0.05)
    As a result of the Company’s net loss in the first quarter of 2024 and 2023, share options and non-vested restricted shares outstanding in the respective periods were excluded from the calculation of diluted loss per share as their inclusion would have been anti-dilutive.
    March 31,
    20242023
    Share options104,244,590 86,242,060 
    Non-vested restricted shares29,893,540 32,154,670 
    9. Borrowings
    In February 2024, the Company entered into certain debt arrangements with the Bank of China, SPD Bank, and Ningbo Bank to support its working capital needs in mainland China. The following table presents the Company’s short-term debts as of March 31, 2024 ($ in thousands):
    Weighted average
    interest rate per annum
    March 31, 2024
    Bank of China Working Capital Loan
    2.95 %34,179 
    SPD Bank Working Capital Loan
    3.45 %14,094 
    Total short-term debts
    3.10 %48,273 
    Bank of China Working Capital Loan Facility
    On February 5, 2024, the Company entered into an uncommitted facility letter with the Bank of China (Hong Kong) Limited (the “BOC HK”) pursuant to which the BOC HK will provide standby letters of credit for loans of up to $100.0 million for a term of one year. In connection with this agreement, the Company paid a one-time, non-refundable fee of $0.7 million. The Company also maintained restricted deposits of $100.0 million, which are presented as restricted cash-current on the condensed consolidated balance sheet, to secure the standby letters of credit. On February 6, 2024, upon the
    11


    Zai Lab Limited
    Notes to the unaudited condensed consolidated financial statements
    Company’s application, the BOC HK provided a standby letter of credit in favor of the Bank of China Pudong Development Zone Branch (the “BOC Pudong Branch”) for $50.0 million which are or may become payable by the Company’s wholly-owned subsidiary, Zai Lab (Shanghai) Co., Ltd. (“Zai Lab Shanghai”), and Zai Lab Shanghai subsequently entered into a working capital loan contract with the BOC Pudong Branch on February 7, 2024 for a loan of RMB340.0 million (approximately $47.8 million), of which an aggregate principal amount of RMB242.5 million (approximately $34.2 million) was withdrawn and outstanding as of March 31, 2024. Each working capital loan withdrawal has a one-year term and is subject to a floating interest rate of approximately 2.95% initially, and is subject to adjustment every six months.
    SPD Bank Working Capital Loan Facility
    On February 6, 2024, the Company entered into a maximum-amount guarantee contract with the Shanghai Pudong Development Bank Co., Ltd. Zhangjiang Hi-Tech Park Sub-branch (the “SPD Bank”) pursuant to which the Company will guarantee working capital loans of up to RMB300.0 million (approximately $42.0 million) from SPD Bank to Zai Lab Shanghai over a three-year period. In the first quarter of 2024, Zai Lab Shanghai has entered into working capital loan contracts with SPD Bank under this debt facility for an aggregate principal amount of RMB100.0 million (approximately $14.1 million). These working capital loans have one-year terms and are subject to a fixed interest rate of 3.45%.
    Ningbo Bank Working Capital Loan Facility
    On February 6, 2024, the Company’s wholly-owned subsidiary, Zai Lab (Suzhou) Co., Ltd. (“Zai Lab Suzhou”), entered into a maximum credit contract with Bank of Ningbo Co., Ltd. Suzhou Sub-branch (“Ningbo Bank”) as well as an Electronic Commercial Draft Discounting Master Agreement and Online Working Capital Loan Master Agreement (collectively, the “Ningbo Bank Agreements”). The Ningbo Bank Agreements permit Zai Lab Suzhou to utilize, including through discounting or working capital loan agreements and subject to the terms and conditions in related master agreements, up to RMB230.3 million (approximately $32.4 million), of which the Company is authorized to utilize up to RMB160.0 million (approximately $22.5 million). In connection with the arrangements described in the Ningbo Bank Agreements, Zai Lab Suzhou agreed to pledge interests in certain real property it owns in Suzhou. As of March 31, 2024, Zai Lab Suzhou has not entered into any discounting arrangements or working capital loans under this Ningbo Bank working capital loan facility.
    10. Other Current Liabilities
    The following table presents the Company’s other current liabilities ($ in thousands):
    March 31, 2024December 31, 2023
    Accrued payroll11,920 33,711 
    Accrued professional service fee3,478 7,520 
    Payables for purchase of property and equipment2,481 2,474 
    Accrued rebate to distributors20,593 16,926 
    Tax payables6,910 16,988 
    Other (i)2,794 5,353 
    Total48,176 82,972 
    (i)Other mainly includes accrued travel and business-related expenses.
    12


    Zai Lab Limited
    Notes to the unaudited condensed consolidated financial statements
    11. Share-Based Compensation
    During the first quarter of 2024, the Company granted share options to purchase up to 398,000 ordinary shares and restricted shares representing 370,500 ordinary shares under the 2022 Plan. The share options granted have a contractual term of ten years. Share options granted since April 2023 generally vest ratably over a four-year period, and share options granted prior to April 2023 generally vest ratably over a five-year period, with 25% or 20% of the awards vesting on each anniversary of the grant date, respectively, subject to continued employment/service with the Company on the vesting date. The restricted shares granted generally vest ratably over a specified period on the anniversary of the grant date, subject to continued employment/service with the Company on the vesting date. For a description of the Company’s equity incentive plans and more details on the terms of the share-based awards, refer to Note 15 of the 2023 Annual Report.
    The following table presents the share-based compensation expense that has been reported in the Company’s condensed consolidated statements of operations and comprehensive loss as follows ($ in thousands):
    Three Months Ended March 31,
    20242023
    Selling, general and administrative11,036 10,063 
    Research and development6,944 6,598 
    Total17,980 16,661 
    As of March 31, 2024, there was unrecognized share-based compensation expense related to unvested share options and unvested restricted shares of $93.2 million and $92.0 million, respectively, which the Company expects to recognize over a weighted-average period of 2.89 years and 2.54 years, respectively.
    12. License and Collaboration Agreements
    The Company has entered into various license and collaboration agreements with third parties to develop and commercialize product candidates.
    For a description of the material terms of the Company’s significant license and collaboration agreements, see Note 16 of the 2023 Annual Report. In the first quarter of 2024, the Company did not enter into any new significant license and collaboration agreements or incur any milestone fees under our existing significant license and collaboration agreements.
    13. Other Income, Net
    The following table presents the Company’s other income, net ($ in thousands):
    Three Months Ended March 31,
    20242023
    Government grants2,791 — 
    Gain on equity investments with readily determinable fair value4,889 441 
    Others miscellaneous gain1,681 793 
    Total9,361 1,234 
    14. Restricted Net Assets
    The Company’s ability to pay dividends may depend on the Company receiving distributions of funds from its Chinese subsidiaries. Relevant Chinese laws and regulations permit payments of dividends by the Company’s Chinese subsidiaries only out of its retained earnings, if any, as determined in accordance with Chinese accounting standards and
    regulations. The results of operations reflected in the unaudited condensed consolidated financial statements prepared in accordance with U.S. GAAP differ from those reflected in the statutory financial statements of the Company’s Chinese subsidiaries.
    In accordance with the Company Law of the People’s Republic of China, a domestic enterprise is required to provide statutory reserves of at least 10% of its annual after-tax profit until such reserve has reached 50% of its respective registered capital based on the enterprise’s Chinese statutory accounts. A domestic enterprise may provide discretionary surplus reserve, at the discretion of the Board of Directors, from the profits determined in accordance with the enterprise’s Chinese statutory accounts. The aforementioned reserves can only be used for specific purposes and are not distributable as cash dividends. The Company’s Chinese subsidiaries were established as domestic enterprises and therefore are subject to the above-mentioned restrictions on distributable profits.
    No appropriation to statutory reserves was made in the first quarter of 2024 and 2023 because the Chinese subsidiaries had substantial losses during such periods.
    As a result of these Chinese laws and regulations, subject to the limits discussed above that require annual appropriations of 10% of after-tax profit to be set aside, prior to payment of dividends, as a general reserve fund, the Company’s Chinese subsidiaries are restricted in their ability to transfer out a portion of their net assets.
    Foreign exchange and other regulation in mainland China may further restrict the Company’s subsidiaries in mainland China from transferring out funds in the form of dividends, loans, and advances. As of March 31, 2024 and December 31, 2023, amounts restricted were the paid-in capital of the Company’s subsidiaries in mainland China, which both amounted to $506.0 million.
    15. Commitments and Contingencies
    (a) Purchase Commitments
    The Company’s commitments related to purchase of property and equipment contracted but not yet reflected in the unaudited condensed consolidated financial statements were $1.1 million as of March 31, 2024 and were expected to be incurred within one year.
    (b) Legal Proceedings
    The Company is not currently a party to any material legal proceedings.
    (c) Indemnifications
    In the normal course of business, the Company enters into agreements that indemnify others for certain liabilities that may arise in connection with a transaction or certain events and activities. To date, the Company has not paid any claims or been required to defend any action related to its indemnification obligations.
    13


    Item 2. Management’s Discussion and Analysis of Financial Condition and Results of Operations
    You should read the following discussion and analysis of our financial condition and results of operations together with our 2023 Annual Report and our unaudited condensed consolidated financial statements and the accompanying notes for the first quarter of 2024 included in Item 1. Financial Statements.
    Overview
    We are a patient-focused, innovative, commercial-stage, global biopharmaceutical company with a substantial presence in both Greater China and the United States. We are focused on discovering, developing, and commercializing products that address medical conditions with significant unmet needs in the areas of oncology, autoimmune disorders, infectious disease, and neuroscience. We intend to leverage our competencies and resources to positively impact human health in Greater China and worldwide. We currently have five commercial products – ZEJULA®, OPTUNE, QINLOCK®, NUZYRA®, and VYVGART® – that have received marketing approval and that we have commercially launched in one or more territories in Greater China. OPTUNE refers to Tumor Treating Fields devices marketed under various brand names, including OPTUNE GIO® for glioblastoma multiforme (“GBM”). We also have multiple programs in late-stage product development and a number of ongoing pivotal trials across our portfolio.
    Since our inception, we have incurred net losses and negative cash flows from our operations. Substantially all of our losses have resulted from funding our research and development programs and selling, general and administrative costs associated with our operations. Developing high quality product candidates requires significant investment in our research and development activities over a prolonged period of time, and a core part of our strategy is to continue making sustained investments in this area. Our ability to generate profits and positive cash flow from operations over the next several years depends upon our ability to successfully market our commercial products and to successfully expand the indications for these products and develop and commercialize our other product candidates. As discussed further below, we expect to continue to incur substantial costs related to our research and development and commercialization activities.
    As we pursue our corporate strategic goals, we anticipate that our financial results will fluctuate from quarter to quarter and year to year depending in part on the balance between the success of our commercial products and the level of our research and development expenses. We cannot predict whether or when our product candidates will receive regulatory approval. Further, if we receive such regulatory approval, we cannot predict whether or when we may be able to successfully commercialize such product or whether or when such product may become profitable.
    Recent Developments
    Commercial Products
    Net product revenue was $87.1 million for the first quarter of 2024, an increase of 39% compared to the prior year period, primarily driven by increased sales volume including from VYVGART, our fifth commercial product that was launched in September 2023. We are expanding access to our products, such as through National Reimbursement Drug List (“NRDL”) listings and inclusions in hospital formularies as well as through supplemental insurance coverage. We are also enhancing brand awareness through outreach efforts.
    Product Candidates
    We continued to advance our product candidates through our research and development activities, including the following developments with respect to our clinical trials and regulatory approvals:
    Oncology
    •Tumor Treating Fields: In March 2024, our partner NovoCure Limited (“NovoCure”) announced that the Phase III METIS clinical trial met its primary endpoint, demonstrating a statistically significant improvement in time to intracranial progression for adult patients treated with Tumor Treating Fields therapy and supportive care compared to supportive care alone in the treatment of patients with 1-10 brain metastases from non-small cell lung cancer (“NSCLC”) following stereotactic radiosurgery. The METIS trial
    14


    demonstrated 21.9 months median time to intracranial progression for patients treated with Tumor Treating Fields and supportive care compared to 11.3 months for patients treated with supportive care alone. We are participating in the METIS trial.
    •Tisotumab Vedotin: In April 2024, our partner Pfizer Inc. and Genmab A/S announced that the U.S. Food and Drug Administration approved the supplemental Biologics License Application granting full approval for tisotumab vedotin (or TIVDAK®) for the treatment of patients with recurrent or metastatic cervical cancer with disease progression on or after chemotherapy. We are participating in the global Phase III innovaTV 301 trial and extension study in Greater China.
    •Adagrasib: We are evaluating the clinical data of the global Phase III KRYSTAL-12 study evaluating adagrasib in previously treated patients with KRASG12C-mutated NSCLC as we decide on next steps in the development of this product across indications.
    •Early-Stage Global Oncology Pipeline: We are currently enrolling patients in the United States and Greater China in the global Phase I study of ZL-1310 (DLL3 ADC) for relapsed and refractory second-line small cell lung cancer who have progressed after platinum-based treatment. We are also enrolling patients in the United States, Europe, and Greater China in the global Phase I study of ZL-1218 (CCR8) as a single agent and in combination with pembrolizumab in patients with advanced solid tumor malignancies.
    Autoimmune Disorders, Infectious Disease, and Neuroscience
    •Efgartigimod: In April 2024, we submitted a supplemental Biologics License Application to the NMPA for efgartigimod alfa injection (subcutaneous injection) (“efgartigimod SC”) for the treatment of patients with chronic inflammatory demyelinating polyneuropathy (“CIDP”).
    •Xanomeline-Trospium (KarXT): In April 2024, our partner Bristol Myers Squibb (“BMS”) presented new interim long-term data from the Phase III EMERGENT program for the treatment of schizophrenia. In the new interim analysis of long-term efficacy data from the Phase 3 EMERGENT-4 open-label extension trial, KarXT was associated with significant improvement in symptoms of schizophrenia across all efficacy measures at 52 weeks, and in the new pooled interim long-term safety and metabolic outcomes from the Phase III EMERGENT-4 and EMERGENT-5 trials, KarXT demonstrated a favorable long-term metabolic profile where most patients experienced stability or improvements on metabolic parameters over 52 weeks of treatment. We are conducting a registrational bridging study in mainland China.
    Corporate Updates
    In April 2024, Andrew Zhu joined Zai Lab as our Chief Commercial Officer in Greater China. Mr. Zhu’s rich experience in building innovative business models and resource integration will help us further enhance our commercial operations and drive sales and profit growth across Greater China. He joins us from Simcere Zaiming, where he most recently served as Chief Operating Officer responsible for the commercial and pharmaceutical business. He previously served in various operational, sales, and marketing leadership roles at leading global biopharmaceutical companies, including AstraZeneca, Roche, Sanofi, and BMS.
    Factors Affecting Our Results of Operations
    Our Commercial Products
    We generate product revenue through the sale of our commercial products in Greater China, net of any related sales returns and rebates to distributors. Our cost of sales mainly consists of the costs of manufacturing ZEJULA and NUZYRA, costs of purchasing OPTUNE, QINLOCK, and VYVGART from our collaboration partners, any royalty fees incurred as a result of sales of our commercial products under our license and collaboration agreements, and amortization of any sales-based milestone fees incurred under our license and collaboration agreements. We expect our revenue to increase in coming years as we continue to focus on increasing patient access to our existing commercial products, such as through NRDL listing or increased supplemental insurance coverage in the private-pay market. For example, in the first quarter of
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    2023, QINLOCK for fourth-line GIST and NUZYRA for the IV treatment of adult patients with CABP and ABSSSI were added to the NRDL. In the first quarter of 2024, VYVGART (efgartigimod alfa injection) for gMG and NUZYRA for the oral treatment of adult patients with CABP and ABSSSI were added to the NRDL. We also expect revenue to increase in coming years as a result of our launch of additional commercial products, if and when we obtain required regulatory approvals. We expect our cost of sales to increase as the volume of products sold increases.
    Research and Development Expenses
    We believe our ability to successfully develop product candidates will be the primary factor affecting our long-term competitiveness, as well as our future growth and development. Developing high quality product candidates requires a significant investment of resources over a prolonged period of time. We are committed to advancing and expanding our pipeline of potential best-in-class and first-in-class products, such as through clinical and pre-clinical trials and business development activities. As a result, we expect to continue making significant investments in research and development, including internal discovery activities.
    Elements of research and development expenditures primarily include:
    •payroll and other related costs of personnel engaged in research and development activities;
    •in-licensed patent rights fees of exclusive development rights of products granted to the Company;
    •costs related to pre-clinical testing of the Company’s technologies and clinical trials, such as payments to contract research organizations (“CROs”) and contract manufacturing organizations (“CMOs”), investigators, and clinical trial sites that conduct our clinical studies; and
    •costs to produce the product candidates, including raw materials and supplies, product testing, depreciation, and facility-related expenses.
    Selling, General, and Administrative Expenses
    Our selling, general, and administrative expenses consist primarily of personnel compensation and related costs, including share-based compensation for commercial and administrative personnel. Other selling, general, and administrative expenses include product distribution and promotion costs, and professional service fees for legal, intellectual property, consulting, auditing, and tax services as well as other direct and allocated expenses for rent and maintenance of facilities, insurance, and other supplies used in selling, general, and administrative activities. We expect these costs to continue to be significant to support sales of our commercial products and preparation to launch and subsequent sales of additional product candidates if and when approved.
    Our Ability to Commercialize Our Product Candidates
    We have multiple product candidates in late-stage clinical development and various others in clinical and pre-clinical development in Greater China and the United States. Our ability to generate revenue from our product candidates is dependent on our receipt of regulatory approvals for and successful commercialization of such product candidates, which may not occur. Certain of our product candidates may require additional pre-clinical and/or clinical development, regulatory approvals in multiple jurisdictions, manufacturing supply, and significant marketing efforts before we generate any revenue from product sales.
    License and Collaboration Arrangements
    Our results of operations have been, and will continue to be, affected by our license and collaboration agreements. In accordance with these agreements, we may be required to make upfront payments and milestone payments upon the achievement of certain development, regulatory, and sales-based milestones for the relevant products as well as certain royalties at tiered percentage rates based on annual net sales of the licensed products in the licensed territories. As of March 31, 2024, we may be required to pay development and regulatory milestone payments of up to an additional aggregate amount of $303.5 million for our current clinical programs and $665.2 million for other programs that are contingent on the progress of our product candidates prior to commercialization. As of March 31, 2024, we also may be
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    required to pay sales-based milestone payments of up to an additional aggregate amount of $2,457.5 million as well as certain royalties at tiered percentage rates on annual net sales that are contingent on product performance. If these milestones or royalties do occur, we view related payments as favorable because such payments signify that the product or product candidate is achieving higher sales levels or advancing toward potential commercial launch.
    Results of Operations
    The following table presents our results of operations ($ in thousands):
    Three Months Ended March 31,Change
    20242023$%
    Revenue87,149 62,797 24,352 39 %
    Expenses
    Cost of sales(33,619)(21,337)(12,282)58 %
    Research and development(54,645)(48,472)(6,173)13 %
    Selling, general, and administrative(69,194)(62,510)(6,684)11 %
    Loss from operations(70,309)(69,522)(787)1 %
    Interest income9,658 10,232 (574)(6)%
    Interest expenses(113)— (113)NM
    Foreign currency (losses) gains(2,068)8,912 (10,980)(123)%
    Other income, net9,361 1,234 8,127 659 %
    Loss before income tax (53,471)(49,144)(4,327)9 %
    Income tax expense— — — — %
    Net loss(53,471)(49,144)(4,327)9 %
    NM - Not Meaningful
    Revenue
    The following table presents the components of the Company’s product revenue ($ in thousands):
    Three Months Ended March 31,Change
    20242023$%
    Product revenue - gross93,112 71,212 21,900 31 %
    Less: Rebates and sales returns(5,963)(8,415)2,452 (29)%
    Product revenue - net87,149 62,797 24,352 39 %
    Our product revenue is derived from the sales of our commercial products primarily in mainland China, net of sales returns and rebates to distributors with respect to the sales of these products.
    Our net product revenue increased by $24.4 million in the first quarter of 2024 primarily driven by increased sales volumes, the launch of VYVGART, and decreased sales rebates to distributors resulting from price reductions in connection with NRDL listings for certain products. In terms of revenue growth by product, ZEJULA, which was renewed with NRDL as a maintenance treatment in the first quarter of 2024, continued being the leading PARP inhibitor in hospital sales for ovarian cancer in mainland China; VYVGART for gMG was commercially launched in mainland China in September 2023 and was included in the NRDL in the first quarter of 2024; increased sales for QINLOCK were supported by its inclusion in the NRDL in the first quarter of 2023; and increased sales for NUZYRA were supported by the inclusion in the NRDL for its IV formulation in the first quarter of 2023 and for its oral formulation in the first quarter of 2024. Although revenue declined for OPTUNE, it increased compared to the fourth quarter of 2023 as patient volume recovered.
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    In the first quarter of 2023, our sales rebates to distributors resulting from price reductions in connection with NRDL listings was $3.9 million, which was driven by price reductions for QINLOCK and NUZYRA in connection with their NRDL listings in the first quarter of 2023. Such sales rebates were immaterial in the first quarter of 2024.
    The following table presents net revenue by product ($ in thousands):
    Three Months Ended March 31,Change
    20242023$%
    ZEJULA45,501 42,680 2,821 7 %
    OPTUNE12,480 13,342 (862)(6)%
    QINLOCK6,093 1,306 4,787 367 %
    NUZYRA9,913 5,469 4,444 81 %
    VYVGART 13,162 — 13,162 NM
    Total product revenue, net87,149 62,797 24,352 39 %
    NM - Not Meaningful
    Cost of Sales
    Cost of sales increased by $12.3 million to $33.6 million in the first quarter of 2024, primarily due to increasing sales volumes and shifts in product sales mix.
    Research and Development Expenses
    The following table presents the components of our research and development expenses ($ in thousands):
    Three Months Ended March 31,Change
    20242023$%
    Personnel compensation and related costs28,008 28,655 (647)(2)%
    Licensing fees— 1,000 (1,000)(100)%
    CROs/CMOs/Investigators expenses19,904 12,439 7,465 60 %
    Other costs6,733 6,378 355 6 %
    Total54,645 48,472 6,173 13 %
    Research and development expenses increased by $6.2 million in the first quarter of 2024, primarily due to:
    •an increase of $7.5 million in CROs/CMOs/Investigators expenses related to newly initiated studies and progress of existing studies; partially offset by
    •a decrease of $1.0 million in licensing fees in connection with decreased development milestone fees for our license and collaboration agreements.
    The following table presents our research and development expenses by program ($ in thousands):
    Three Months Ended March 31,Change
    20242023$%
    Clinical programs18,788 12,528 6,260 50 %
    Pre-clinical programs2,049 2,481 (432)(17)%
    Unallocated research and development expenses33,808 33,463 345 1 %
    Total54,645 48,472 6,173 13 %
    Research and development expenses attributable to clinical programs increased by $6.3 million in the first quarter of 2024 primarily driven by increased CROs/CMOs/Investigators expenses related to newly initiated studies and progress of
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    existing studies. Research and development expenses attributable to pre-clinical programs decreased by $0.4 million in the first quarter of 2024 primarily due to a decrease in milestone fees for our license and collaboration agreements.
    Although we manage our external research and development expenses by program, we do not allocate our internal research and development expenses by program because our employees and internal resources may be engaged in projects for multiple programs at any given time.
    Selling, General, and Administrative Expenses
    The following table presents our selling, general and administrative expenses by program ($ in thousands):
    Three Months Ended March 31,Change
    20242023$%
    Personnel compensation and related costs45,894 40,914 4,980 12 %
    Professional service fees4,103 8,555 (4,452)(52)%
    Other costs19,197 13,041 6,156 47 %
    Total69,194 62,510 6,684 11 %
    Selling, general, and administrative expenses increased by $6.7 million in the first quarter of 2024, primarily due to:
    •an increase of $6.2 million in other costs, mainly related to higher general selling expenses for VYVGART which was launched in September 2023 and higher promotional fees for NUZYRA due to increased sales.
    •an increase of $5.0 million in personnel compensation and related costs primarily driven by headcount growth; partially offset by
    •a decrease of $4.5 million in professional service fees, primarily related to legal, compliance, accounting, human resources administrative, and commercial expenses.
    Interest Income
    Interest income decreased by $0.6 million to $9.7 million in the first quarter of 2024 primarily due to decreased cash and cash equivalents.
    Interest Expenses
    Interest expenses increased by $0.1 million in the first quarter of 2024 primarily due to interest expenses on short-term debts we entered into in February 2024. We had no such interest expenses in the prior year period.
    Foreign Currency (Losses) Gains
    Foreign currency losses was $2.1 million in the first quarter of 2024, primarily driven by remeasurement losses due to depreciation of the RMB against the U.S. dollar, compared to foreign currency gain of $8.9 million in the first quarter of 2023, driven by remeasurement gain due to appreciation of the RMB against the U.S. dollar.
    Other Income, Net
    Other income, net increased by $8.1 million to $9.4 million in the first quarter of 2024, primarily due to an increase of $4.4 million in gain of our equity investment in MacroGenics, Inc as a result of changes in its stock price and an increase of $2.8 million in government grants.
    Income Tax Expense
    Income tax expense was nil in the first quarter of 2024 and 2023.
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    Net Loss
    Net loss was $53.5 million in the first quarter of 2024, or a loss per ordinary share attributable to common stockholders of $0.05 (or loss per ADS of $0.55), compared to a net loss of $49.1 million in the first quarter of 2023, or a loss per ordinary share of $0.05 (or loss per ADS of $0.51).
    Critical Accounting Policies and Significant Judgments and Estimates
    We prepare our financial statements in conformity with U.S. GAAP, which requires management to make judgments, estimates, and assumptions that affect the reported amounts of assets, liabilities, revenues, expenses, and related disclosures. Some of those judgments can be subjective and complex. Actual results could differ from our estimates.
    Our most critical accounting policies and estimates, including those that require the most difficult, subjective, or complex judgments and are the most inherently uncertain, are described below.
    Revenue Recognition
    We sell our products to distributors (our customers), who ultimately sell the products to healthcare providers, primarily in mainland China. We recognize revenue when the performance obligations are satisfied upon the product’s delivery to distributors.
    We offer rebates to our distributors to compensate the distributors consistent with pharmaceutical industry practices. We are required to establish a provision for rebates in the same period the related product sales are recognized. The estimated amount of rebates, if any, is recorded as a reduction of revenue.
    Significant judgments are required in making these estimates. In determining the appropriate accrual amount, we consider our contracted rates, sales volumes, levels of distributor inventories, and historical experiences and trends. If actual results vary from our estimates or our expectations change, we will adjust these estimates accordingly, which would affect net product revenue and earnings in the period such variances become expected or known.
    Research and Development Expenses
    We have a significant amount of research and development expenses, including with respect to pre-clinical and clinical trials for our product candidates. Such costs are expensed as incurred when they have no alternative future uses.
    We contract with third parties to perform various pre-clinical and clinical trial activities on our behalf in the ongoing development of our product candidates. Expenses related to pre-clinical and clinical trial activities are accrued based on the Company’s estimates of the actual services performed by the third parties, such as CROs and CMOs.
    Significant judgments are required in estimating the actual services performed by the third parties for the respective period and the related expense accruals. In determining the appropriate accrual, we consider a variety of factors, including contractual requirements with respect to services to be provided, related rates, and our assessment of services performed during the period and progress with respect to any contractual milestones when we have not yet been invoiced or otherwise notified by third parties of actual costs. If the actual status and timing of services performed vary from our estimates, our reported expenses and earnings for the corresponding period may be affected.
    Share-Based Compensation
    We grant share-based awards, including share options and restricted shares, to eligible employees, non-employees, and directors. Such share-based awards are measured at grant date fair value.
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    Significant assumptions are required in determining the fair value of share options, which we estimate using the Black-Scholes option valuation model. These assumptions include: (i) the expected volatility of our ADS price, (ii) the periods of time over which grantees are expected to hold their options prior to exercise (expected term), (iii) the expected dividend yield on our ADSs, and (iv) risk-free interest rates. Since we do not have sufficient trading history since our September 2017 initial public offering on Nasdaq to cover the expected term of our share options, we estimate expected volatility based on movements in the share price of certain companies we consider comparable over the most recent equivalent historical period. Since we do not have sufficient historical information to develop reasonable expectations about future exercise patterns and post-vesting employment termination behavior, the expected term is derived from the average midpoint between the weighted average vesting and the contractual term, also known as the simplified method. The expected dividend yield is zero as we have never paid dividends and do not currently anticipate paying any in the foreseeable future, and risk-free interest rates are based on quoted U.S. Treasury rates for securities with maturities approximating the expected term. If actual results vary from our estimates or our expectations change, our reported expenses and earnings for the corresponding period may be affected.
    Income Taxes
    We recognize deferred tax assets and liabilities for temporary differences between the financial statement and income tax bases of assets and liabilities, which are measured using enacted tax rates and laws that will be in effect when the differences are expected to reverse. A valuation allowance is provided when it is more likely than not that some or all of a deferred tax asset will not be realized. Significant judgements are required when evaluating tax positions in accordance with ASC 740, Income Taxes.
    We recognize in our financial statements the benefit of a tax position if the tax position is “more likely than not” to prevail based on the facts and technical merits of the position. Tax positions that meet the “more likely than not” recognition threshold are measured at the largest amount of tax benefit that has a greater than fifty percent likelihood of being realized upon settlement. We estimate our liability for unrecognized tax benefits which are periodically assessed and may be affected by changing interpretations of laws, rulings by tax authorities, changes and/or developments with respect to tax audits, and the expiration of the applicable statute of limitations. The ultimate outcome for a particular tax position may not be determined with certainty prior to the conclusion of a tax audit and, in some cases, appeal or litigation process.
    We consider positive and negative evidence when determining whether some or all of our deferred tax assets will not be realized. This assessment considers various factors, including the nature, frequency, and severity of current and cumulative losses, forecasts of future profitability, the duration of statutory carry-forward periods, our historical results of operations, and our tax planning strategies. The ultimate realization of deferred tax assets is dependent upon the generation of future taxable income during the periods in which those temporary differences become deductible. Our estimates may be affected by changing interpretations of laws, rulings by tax authorities, changes and/or developments with respect to tax audits, and expiration of the statute of limitations. If actual benefits vary from our estimates or our expectations change, we will adjust the recognition and measurement estimates accordingly, which would affect reported expenses and earnings in the corresponding period.
    Liquidity and Capital Resources
    To date, we have financed our activities primarily through private placements, our September 2017 initial public offering and various follow-on offerings on Nasdaq, and our September 2020 secondary listing and initial public offering on the Hong Kong Stock Exchange. In addition, we have raised approximately $164.6 million in private equity financing and approximately $2,462.7 million in net proceeds after deducting underwriting commissions and the offering expenses payable by us in our initial public offering and subsequent follow-on offerings on Nasdaq and our initial public offering on the Hong Kong Stock Exchange. Our operations have consumed substantial amounts of cash since inception. The net cash used in our operating activities was $90.1 million and $69.3 million in the first quarter of 2024 and 2023, respectively. For information on our research and development activities and related expenditures see the Research and Development Expenses, Selling, General, and Administrative Expenses, License and Collaboration Arrangements, and Results of Operations sections in above. In addition, as of March 31, 2024, we had commitments for capital expenditures of $1.1 million, mainly for the purpose of plant construction and installation.
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    As of March 31, 2024, we had cash and cash equivalents, current restricted cash, and short-term investments of $750.8 million, which we expect will enable us to meet our cash requirements including the funding of operating expenses, capital expenditures, and debt obligations for at least the next 12 months.
    Although we believe that we have sufficient capital to fund our operations for at least the next twelve months, we may, from time to time, identify opportunities to access capital through debt arrangements on favorable commercial terms. In February 2024, we entered into three such debt arrangements with Chinese financial institutions that allow certain of our subsidiaries to borrow up to approximately $164.5 million (or RMB1,171.7 million) to support our working capital needs in mainland China. As of March 31, 2024, we have short-term debts of approximately $48.3 million (or RMB342.5 million) pursuant to these debt arrangements. These debt arrangements will provide us with additional capital capacity that gives us enhanced flexibility to execute on our corporate strategic goals. For more information, see Note 9.
    We may consider, or we may ultimately need, additional funding sources to bring to fruition or research and development objectives or otherwise, and there can be no assurances that such funding will be made available to us on acceptable terms or at all.
    The following table presents information regarding our cash flows ($ in thousands):
    Three Months Ended
    March 31,
    Change
    20242023$
    Net cash used in operating activities(90,106)(69,287)(20,819)
    Net cash provided by (used in) investing activities3,292 (53,954)57,246 
    Net cash provided by (used in) financing activities47,548 (3,886)51,434 
    Effect of foreign exchange rate changes on cash, cash equivalents and restricted cash(104)(1,299)1,195 
    Net decrease in cash, cash equivalents and restricted cash(39,370)(128,426)89,056 
    Net Cash Used in Operating Activities
    Net cash used in operating activities increased by $20.8 million to $90.1 million in the first quarter of 2024, primarily due to an increase of $24.7 million in net changes in operating assets and liabilities, an increase of $4.3 million in net loss, partially offset by a decrease of $8.3 million in adjustments to reconcile net loss to net cash used in operating activities.
    Net Cash Provided by (Used in) Investing Activities
    Net cash provided by investing activities was $3.3 million in the first quarter of 2024, compared to net cash used in investing activities of $54.0 in the first quarter of 2023. This shift was primarily due to a decrease of $100.0 million in purchases of short-term investments, a decrease of $2.5 million in purchases of property and equipment, partially offset by a decrease of $33.2 million in proceeds from the maturity of short-term investments, and an increase of $12.0 million from acquisition of intangible assets as we made a sales-based milestone payment which was capitalized as intangible assets in the fourth quarter of 2023.
    Net Cash Provided by (Used in) Financing Activities
    Net cash provided by financing activities was $47.5 million in the first quarter of 2024, compared to net cash used in financing activities of $3.9 million in the first quarter of 2023. This shift was primarily due to $48.2 million in proceeds from short-term debts we entered into in the first quarter of 2024, partially offset by decreases of $5.1 million in taxes paid related to settlement of equity awards and $1.2 million in proceeds from exercises of stock options.
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    Recently Issued Accounting Standards
    For more information regarding recently issued accounting standards, see Part II – Item 8. Financial Statements and Supplementary Data – Recent Accounting Pronouncements in our 2023 Annual Report. The Company has not adopted any new accounting standards since December 31, 2023.
    Item 3. Quantitative and Qualitative Disclosures About Market Risk
    We are exposed to market risk including foreign exchange risk and credit risk.
    Foreign Exchange Risk
    Renminbi, or RMB, is not a freely convertible currency. The State Administration of Foreign Exchange, under the authority of the People’s Bank of China (“PBOC”), controls the conversion of RMB into foreign currencies. The value of RMB is subject to changes in central government policies and to international economic and political developments affecting supply and demand in the China Foreign Exchange Trading System market. The cash and cash equivalents of the Company included aggregated amounts of $17.9 million and $25.1 million, which were denominated in RMB, representing 3% of the cash and cash equivalents as of both March 31, 2024 and December 31, 2023, respectively.
    While our financial statements are presented in U.S. dollars, our business mainly operates in mainland China with a significant portion of our transactions settled in RMB, and as such, we do not believe that we currently have significant direct foreign exchange risk and have not used derivative financial instruments to hedge our exposure to such risk. Although, in general, our exposure to foreign exchange risks should be limited, the value of your investment in our ADSs and ordinary shares will be affected by the exchange rate between the U.S. dollar and the RMB and between the HK dollar and the RMB, respectively, because the value of our business is effectively denominated in RMB, while ADSs and ordinary shares are traded in U.S. dollars and HK dollars, respectively.
    The value of the RMB against the U.S. dollar and other currencies may fluctuate and is affected by, among other things, changes in Greater China’s political and economic conditions. The conversion of RMB into foreign currencies, including U.S. dollars, has been based on rates set by the PBOC.
    The value of our ADSs and our ordinary shares will be affected by the foreign exchange rates between U.S. dollars, HK dollars, and the RMB. For example, to the extent that we need to convert U.S. dollars or HK dollars into RMB for our operations or if any of our arrangements with other parties are denominated in U.S. dollars or HK dollars and need to be converted into RMB, appreciation of the RMB against the U.S. dollar or the HK dollar would have an adverse effect on the RMB amount we receive from the conversion. Conversely, if we decide to convert RMB into U.S. dollars or HK dollars for the purpose of making payments for dividends on ordinary shares or ADSs or for other business purposes, appreciation of the U.S. dollar or the HK dollar against the RMB would have a negative effect on the conversion amounts available to us.
    Since 1983, the Hong Kong Monetary Authority (“HKMA”) has pegged the HK dollar to the U.S. dollar at the rate of approximately HK$7.80 to US$1.00. However, there is no assurance that the HK dollar will continue to be pegged to the U.S. dollar or that the HK dollar conversion rate will remain at HK$7.80 to US$1.00. If the HK dollar conversion rate against the U.S. dollar changes and the value of the HK dollar depreciates against the U.S. dollar, our assets denominated in HK dollars will be adversely affected. Additionally, if the HKMA were to repeg the HK dollar to, for example, the RMB rather than the U.S. dollar, or otherwise restrict the conversion of HK dollars into other currencies, then our assets denominated in HK dollars will be adversely affected.
    Credit Risk
    Financial instruments that are potentially subject to significant concentration of credit risk consist of cash and cash equivalents, short-term investments, accounts receivable, and notes receivable.
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    The carrying amounts of cash and cash equivalents and short-term investments represent the maximum amount of losses due to credit risk. As of March 31, 2024 and December 31, 2023, we had cash and cash equivalents of $650.8 million and $790.2 million, and short-term investments of nil and $16.3 million, respectively. As of March 31, 2024 and December 31, 2023, all of our cash and cash equivalents and short-term investments were held by major financial institutions located in mainland China and international financial institutions outside of mainland China which we believe are of high credit quality and for which we monitor continued credit worthiness.
    Accounts receivable are typically unsecured and are derived from product sales and collaborative arrangements. We manage credit risk related to our accounts receivable through ongoing monitoring of outstanding balances and limiting the amount of credit extended based upon payment history and credit worthiness. Historically, we have collected receivables from customers within the credit terms with no significant credit losses incurred. As of March 31, 2024, our two largest customers accounted for approximately 21% of our total accounts receivable collectively.
    Certain accounts receivable balances are settled in the form of notes receivable. As of March 31, 2024, such notes receivable included bank acceptance promissory notes that are non-interest bearing and due within six months. These notes receivable were used to collect the receivables based on an administrative convenience, given these notes are readily convertible to known amounts of cash. In accordance with the sales agreements, whether to use cash or bank acceptance promissory notes to settle the receivables is at our discretion, and this selection does not impact the agreed contractual purchase prices.
    Item 4. Controls and Procedures
    Management’s Evaluation of our Disclosure Controls and Procedures
    Our management, including our Chief Executive Officer and Chief Financial Officer, performed an evaluation of the effectiveness of our disclosure controls and procedures (as defined in Exchange Act Rule 13a-15(e)) as of the end of the period covered by this report. Our disclosure controls and procedures are designed to ensure that the information required to be disclosed in the reports that we file or furnish under the Exchange Act is recorded, processed, summarized, and reported within the time periods specified in the SEC’s rules and forms and that such information is accumulated and communicated to our management, including our Chief Executive Officer and Chief Financial Officer, to allow timely decisions regarding required disclosure. Any controls and procedures, no matter how well designed and operated, can provide only reasonable assurance of achieving the desired control objective. Based upon that evaluation, our management has concluded that, as of March 31, 2024, our disclosure controls and procedures were effective.
    Changes in Internal Control over Financial Reporting
    There were no changes in our internal control over financial reporting (as such item is defined in Rules 13a-15(f)) during the fiscal quarter ended March 31, 2024 that materially affected, or are reasonably likely to materially affect, our internal control over financial reporting.
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    PART II - OTHER INFORMATION
    Item 1. Legal Proceedings.
    We may be, from time to time, subject to claims and suits arising in the ordinary course of business. We are not currently a party to any material legal or administrative proceedings.
    Item 1A. Risk Factors.
    We are subject to risks and uncertainties that could, directly or indirectly, adversely affect our business, results of operations, financial condition, liquidity, cash flows, strategies, and/or prospects. There have been no material changes in our risk factors from those disclosed in the “Risk Factors” section of our 2023 Annual Report.
    Item 2. Unregistered Sales of Equity Securities and Use of Proceeds.
    None.
    Item 3. Defaults Upon Senior Securities.
    None.
    Item 4. Mine Safety Disclosures.
    None.
    Item 5. Other Information.
    Other than as described below, during the period covered by this report, none of the Company’s directors or executive officers has adopted or terminated a Rule 10b5-1 trading arrangement or a non-Rule 10b5-1 trading arrangement (each as defined in Item 408 of Regulation S-K).
    On February 23, 2024, William Lis, one of the Company’s directors, adopted a new written Rule 10b5-1 trading arrangement for the disposition of up to 10,397 of the Company’s ADSs, each representing ten of the Company’s ordinary shares, to cover tax obligations in connection with the vesting of a previously granted restricted stock award. This Rule 10b5-1 trading arrangement is scheduled to terminate no later than July 31, 2024.
    In addition, in the 2023 Annual Report, the Company inadvertently omitted disclosure regarding the adoption of a new written Rule 10b5-1 trading arrangement on December 13, 2023 by F. Ty Edmondson, the Company’s Chief Legal Officer, for the sale of up to 40,000 ADSs. This Rule 10b5-1 trading arrangement is scheduled to terminate no later than November 29, 2024. In addition, the Rule 10b5-1 trading arrangement adopted by Rafael Amado, the Company’s President, Head of Global Oncology Research and Development, on December 15, 2023 is for the sale of up to 15,750 ADSs, rather than 94,500 ADSs as previously disclosed in our 2023 Annual Report.
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    Item 6. Exhibits.
    Exhibit Index
    Exhibit
    Number
    Exhibit Title
    10.1#
    Non-Employee Director Compensation Policy
    10.2
    Facility Letter, dated as of February 5, 2024, by and between Zai Lab Limited and Bank of China (Hong Kong) Limited (incorporated by reference to Exhibit 10.33 to our Annual Report on Form 10-K (File No. 001-38205) filed on February 27, 2024
    10.3
    Unofficial English Translation of Working Capital Loan Agreement, dated as of February 7, 2024, by and between Zai Lab (Shanghai) Co., Ltd. and Bank of China Pudong Development Zone Sub-branch (incorporated by reference to Exhibit 10.2 to our Current Report on Form 8-K (File No. 001-38205) filed on February 8, 2024)
    10.4
    Unofficial English Translation of Maximum-Amount Guarantee Contract, dated as of February 6, 2024, by and between Zai Lab Limited and Shanghai Pudong Development Bank Co., Ltd. Zhangjiang Hi-Tech Park Sub-branch (incorporated by reference to Exhibit 10.3 to our Current Report on Form 8-K (File No. 001-38205) filed on February 8, 2024)
    10.5
    Unofficial English Translation of Maximum Credit Contract, dated as of February 6, 2024, by and between Zai Lab (Suzhou) Co., Ltd. and Bank of Ningbo Co., Ltd. Suzhou Branch (incorporated by reference to Exhibit 10.4 to our Current Report on Form 8-K (File No. 001-38205) filed on February 8, 2024)
    10.6
    Unofficial English Translation of Electronic Commercial Draft Discounting Master Agreement, dated as of February 6, 2024, by and between Zai Lab (Suzhou) Co., Ltd. and Bank of Ningbo Co., Ltd. Suzhou Branch (incorporated by reference to Exhibit 10.5 to our Current Report on Form 8-K (File No. 001-38205) filed on February 8, 2024)
    10.7
    Unofficial English Translation of Online Working Capital Loan Master Agreement, dated as of February 6, 2024, by and between Zai Lab (Suzhou) Co., Ltd. and Bank of Ningbo Co., Ltd. Suzhou Branch (incorporated by reference to Exhibit 10.6 to our Current Report on Form 8-K (File No. 001-38205) filed on February 8, 2024)
    31.1
    Certification of Chief Executive Officer Required by Exchange Act Rule 13a-14(a)
    31.2
    Certification of Chief Financial Officer Required by Exchange Act Rule 13a-14(a)
    32.1
    Certification of Chief Executive Officer Required by 18 U.S.C. Section 1350
    32.2
    Certification of Chief Financial Officer Required by 18 U.S.C. Section 1350
    101.INS*Inline XBRL Instance Document-the instance document does not appear in the Interactive Data File because its XBRL tags are embedded within the Inline XBRL document
    101.SCH*Inline XBRL Taxonomy Extension Schema Document
    101.CAL*Inline XBRL Taxonomy Extension Calculation Linkbase Document
    101.LAB*Inline XBRL Taxonomy Extension Label Linkbase Document
    101.PRE*Inline XBRL Taxonomy Extension Presentation Linkbase Document
    101.DEF*Inline XBRL Taxonomy Extension Definitions Linkbase Document
    104*Cover Page Interactive Data File (formatted as Inline XBRL and contained in Exhibit 101)

    # Management contract or compensatory plan, contract, or arrangement
    26


    SIGNATURES
    Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned thereunto duly authorized.
    ZAI LAB LIMITED
    Dated: May 8, 2024
    By:/s/ Yajing Chen
    Name:Yajing Chen
    Title:Chief Financial Officer
    (Principal Financial and Accounting Officer)
    27
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