Company: QTIWW
Filing Date: 2025-12-31
Form Type: 424B3
Source: 0001628280-25-059235
Chunk: 338

Company: QT IMAGING HOLDINGS, INC.
Filing Date: 2025-12-31
Form: 424B3
Chunk 338
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”), pursuant to which Cable Car agreed to advance $1,500,000 at the closing of the Business Combination, as was evidenced by a promissory no te that may be convertible in certain circumstances into shares of the Company's common stock at a conversion price of $6.00 per share (the “Loan”), dated March 4, 2024, by and between QT Imaging and Cable Car. The Loan does not bear interest, and is due and payable 13 months after issuance, unless the time for payment is accelerated as a result of an event of default. On March 4, 2024, as full compensation to Cable Car for the Loan to QT Imaging in lieu of any simple or in-kind interest on the Loan, QT Imaging issued to Cable Car that number of shares of the Company which at the completion of the Business Combination would be converted in accordance with the terms of the Business Combination Agreement into 60,000 shares of the Company's common stock. See Note 8.

In February 2024, GigCapital5 and QT Imaging (together the “parties”) entered into a subscription agreement with William Blair & Co., L.L.C. (“William Blair”) for the purchase of shares of common stock of QT Imaging. Pursuant to the subscription agreement, QT Imaging issued to William Blair in satisfaction of certain fees owed to William Blair for its services to the parties, that number of shares of QT Imaging which at the completion of the Business Combination were converted in accordance with the terms of the Business Combination Agreement into 246,667 shares of the Company’s common stock. The issuance of these shares settled $2,410,000 of net assumed liabilities from the business combination with an additional transaction cost expense of $202,200 recorded as selling, general and administrative expense within the consolidated statement of operations and comprehensive loss during the year ended December 31, 2024.

<div align='center'>F-20</div>

#### QT IMAGING HOLDINGS, INC.

### Notes to Consolidated Financial Statements
In February 2024, the parties agreed to amend one of the non-redemption agreements that were entered into in December 2023 (“December 2023 Non-Redemption Agreements”), pursuant to which, and in addition to the Company’s common stock issuable Mizuho Securities USA, LLC (“Mizuho”) under the December 2023 Non-Redemption Agreement, Mizuho received from QT Imaging, in exchange for $250,000 of services rendered by Mizuho, that