QT Imaging Holdings, Inc. (NASDAQ:QTI) ("QT Imaging" or the "Company"), a medical device company dedicated to transforming breast health management through innovative, radiation-free imaging technology, announces that it is expected to be added to the Russell Microcap® Index according to the list of additions posted online May 22, 2026. The addition of QT Imaging to this Index will be finalized at the conclusion of the 2026 Russell indexes reconstitution and, if affirmed, will be effective when the U.S. market opens on June 29, 2026.

The June Russell U.S. Indexes reconstitution captures the 4,000 largest U.S. stocks as of April 30, 2026, ranked by total market capitalization. The Russell Microcap® Index measures the performance of the microcap segment of the U.S. equity market and is widely used by institutional investors and investment managers as a benchmark for microcap equities.

Membership in the Russell Microcap® Index enhances visibility within the investment community, broadens exposure to institutional investors and index-based investment strategies, and increases awareness among market participants focused on the microcap sector. Inclusion also results in automatic membership in the applicable Russell growth and value style indexes.

FTSE Russell determines membership for its Russell indexes primarily by objective market capitalization rankings and style attributes.

"Expected inclusion in the Russell Microcap® Index represents an important milestone for QT Imaging and reflects the progress we have made in executing our growth strategy," commented Dr. Raluca Dinu, Chief Executive Officer of QT Imaging. "We believe inclusion will further enhance the visibility of QT Imaging within the investment community as we advance commercialization of our breast imaging platform, expand market adoption, and continue building a differentiated precision imaging and biomarker ecosystem."

About FTSE Russell, an LSEG Business

FTSE Russell is a global index leader that provides innovative benchmarking, analytics and data solutions for investors worldwide. FTSE Russell calculates thousands of indexes that measure and benchmark markets and asset classes in more than 70 countries, covering 98% of the investable market globally.

FTSE Russell index expertise and products are used extensively by institutional and retail investors globally. Approximately $21.2 trillion is benchmarked to FTSE Russell indexes. Leading asset owners, asset managers, ETF providers and investment banks choose FTSE Russell indexes to benchmark their investment performance and create ETFs, structured products and index-based derivatives.

A core set of universal principles guides FTSE Russell index design and management: a transparent rules-based methodology is informed by independent committees of leading market participants. FTSE Russell is focused on applying the highest industry standards in index design and governance and embraces the IOSCO Principles. FTSE Russell is also focused on index innovation and customer partnerships as it seeks to enhance the breadth, depth and reach of its offering.

FTSE Russell is wholly owned by LSEG. For more information, visit FTSE Russell.

About QT Imaging

QT Imaging Holdings, Inc. (NASDAQ:QTI) is a medical device company engaged in the research, development, and commercialization of innovative imaging systems using low frequency sound waves. QT Imaging Holdings, Inc. strives to improve global health outcomes. Its strategy is predicated upon the fact that medical imaging is critical to the detection, diagnosis, and treatment of disease and that it should be safe, affordable, accessible, and centered on the patient's experience. For more information on QT Imaging Holdings, Inc., please visit www.qtimaging.com and follow us on LinkedIn.

Breast Acoustic CT™ is a trademark of an affiliate of QT Imaging Holdings, Inc.

Forward-Looking Statements

This press release contains forward-looking statements within the meaning of Section 27A of the Securities Act of 1933, as amended, and Section 21E of the Exchange Act of 1934, as amended. Forward-looking statements generally are accompanied by words such as "believe," "may," "will," "estimate," "continue," "anticipate," "intend," "expect," "should," "would," "plan," "predict," "potential," "seem," "seek," "future," "outlook," and similar expressions that predict or indicate future events or trends or that are not statements of historical matters. These forward-looking statements include, but are not limited to, statements regarding the inclusion of the Company's common stock in the Russell Microcap® Index, plans for QT Imaging, new product development and introduction, product sales growth and projected revenues, QT Imaging's industry, future events, and other statements that are not historical facts. Forward-looking statements involve certain risks and uncertainties, and actual results may differ materially from those discussed in any such statement. These statements are based on various assumptions, whether or not identified herein, and on the current expectations of QT Imaging's management and are not predictions of actual performance. These forward-looking statements are provided for illustrative purposes only and are not intended to serve as, and must not be relied on by you or any other investor as, a guarantee, an assurance, a prediction or a definitive statement of fact or probability. Actual events and circumstances are difficult or impossible to predict and will differ from assumptions. Many actual events and circumstances are beyond our control. These forward-looking statements are subject to a number of risks and uncertainties, including those relating to: the ability of the Company to sell and deploy the QT Imaging Breast Acoustic CT Scanner; the ability to extend product offerings into new areas or products; the ability to commercialize technology; unexpected occurrences that deter the full documentation and "bring to market" plan for products; trends and fluctuations in the industry; changes in demand and purchasing volume of customers; unpredictability of suppliers; the ability to attract and retain qualified personnel and the ability to move product sales to production levels; changes in domestic and foreign business, market, financial, political, and legal conditions; the uncertainty of projected financial information; delays caused by factors outside of our control; changes in our ability to successfully receive purchase orders and generate revenue under our existing contracts with partners and distributors; our ability to realize the benefits of the strategic partnerships; the identified material weakness in our internal controls over financial reporting (including the timeline to remediate the material weakness); the rollout of the business and the timing of expected business milestones; the effects of competition on our future business; our ability to obtain and access financing in the future; our ability to pay our debt obligations as they come due; and those factors discussed in the Company's reports and other documents filed with the SEC, including under the heading "Risk Factors." If any of these risks materialize or our assumptions prove incorrect, actual results could differ materially from the results implied by these forward-looking statements. There may be additional risks that QT Imaging presently does not know or that QT Imaging currently believes are immaterial which could also cause actual results to differ from those contained in the forward-looking statements. In addition, forward-looking statements reflect QT Imaging's expectations, plans or forecasts of future events and views as of the date of this release. QT Imaging anticipates that subsequent events and developments will cause QT Imaging's assessments to change. However, while QT Imaging may elect to update these forward-looking statements at some point in the future, QT Imaging specifically disclaims any obligation to do so. Accordingly, undue reliance should not be placed upon the forward-looking statements.

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QT Imaging Set to Join the Russell Microcap® Index