Company: QTIWW
Filing Date: 2025-02-05
Form Type: 424B3
Source: 0001628280-25-004061
Chunk: 284

Company: QT IMAGING HOLDINGS, INC.
Filing Date: 2025-02-05
Form: 424B3
Chunk 284
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 agreed to amend and restate the Extension Note to extend the date of maturity until March 4, 2025. On November 22, 2024, GigAcquisitions5 exchanged the Extension Note for the purchase of PIPE Shares and PIPE Warrants in the Private Placement.

#### QT Imaging Related Agreements

#### QTI Working Capital Note
On May 3, 2023, the Company issued a promissory note (the “

#### QTI Working Capital Note
”) to a shareholder for a principal amount of $250,000. The QTI Working Capital Note was subsequently amended and restated five times on June 12, 2023 to add an additional principal amount of $100,000, August 15, 2023 to add an additional principal amount of $75,000, August 29, 2023 to add an additional principal amount of $100,000, September 12, 2023 to add an additional principal amount of $75,000, and September 15, 2023 to add an additional principal amount of $50,000, for an aggregate principal amount outstanding as of September 30, 2023 under the QTI Working Capital Note of $650,000. The QTI Working Capital Note was issued to provide the Company with additional working capital during the period prior to consummation of the business combination agreement with GigCapital5, Inc. The QTI Working Capital Note is interest-free and matures on the earlier of (i) the date on which the Company consummates the business combination with GigCapital5, Inc.; (ii) the date the Company winds up; or (iii) December 1, 2023. The QTI Working Capital Note may be prepaid without penalty. On October 26, 2023, the QTI Working Capital Note was amended to increase the outstanding principal amount to $705,000 and extend the potential maturity date from December 1, 2023 to December 31, 2023.

#### QT Imaging Holdings Agreements
Dr. Klock has previously operated a medical practice as a sole proprietorship under the name QT Imaging Center (the “

#### Practice
”), where, among other things, patients can receive scans using a QT Breast Scanner. Dr. Klock retired effective December 31, 2024, and as a result, is no longer operating the Practice. Notwithstanding his retirement, on January 23, 2025, Dr. Klock agreed to reopen the Practice for a brief