Company: QTIWW
Filing Date: 2025-12-29
Form Type: S-1/A
Source: 0001628280-25-058960
Chunk: 442

Company: QT IMAGING HOLDINGS, INC.
Filing Date: 2025-12-29
Form: S-1/A
Chunk 442
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3 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, September 15, 2023 to add an additional principal amount of $ 50,000, and October 26, 2023 to add an additional principal amount of $ 55,000, for an aggregate principal amount outstanding as of September 30, 2025 under the Working Capital Note of $ 705,000. The 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. The Working Capital Note is interest-free and originally matured on the earlier of (i) the date on which the Company consummated the Business Combination with GigCapital5; (ii) the date the Company winds up; or (iii) December 31, 2023. The Working Capital Note may be prepaid without penalty. On March 4, 2024, the holder of the Working Capital Note agreed to extend and subordinate the promissory note pursuant to and in accordance with the terms of the Business Combination Agreement. Effective on the Closing of the Business Combination, the Working Capital Note cannot be repaid prior to the repayment or conversion of the Yorkville Note received from Yorkville (see Note 7). In connection with the issuance of the Lynrock Lake Term Loan, on February 26, 2025, the maturity date on the Working Capital Note was extended to October 1, 2027.

<div align='center'>F-80</div>

#### QT IMAGING HOLDINGS, INC.

### Notes to Condensed Consolidated Financial Statements
<div align='center'>(Unaudited)</div>

Private Placement

On April 24, 2025, the Company completed the First Securities Purchase Agreement for net proceeds of $ 500,000in exchange for a total of 261,644shares of the Company’s common stock and warrants to purchase 523,286shares of common stock that are issuable upon exercise. See Note 10, Stockholders’ Deficit.

#### 15.

#### Segment Information
The Company has oneoperating and reportable segment, which is engaged in the development and commercialization of the Company’s QT Breast Scanner. The Company’s Chief Executive Officer has been determined to be the chief operating decision maker (“COD