Company: QTIWW
Filing Date: 2025-01-31
Form Type: S-1/A
Source: 0001628280-25-003316
Chunk: 427

Company: QT IMAGING HOLDINGS, INC.
Filing Date: 2025-01-31
Form: S-1/A
Chunk 427
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) 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 8).

On March 4, 2024, the Company assumed the $ 1,560,000outstanding debt balance due to a related party (the “Extension Note”) pursuant to the Business Combination Agreement. The Extension Note does not bear any interest and cannot be repaid prior to the repayment of the Yorkville Note received from Yorkville. See Note 16 regarding the surrender and cancellation of the Extension Note.

Management Services and Business Associate Agreement

In September 2020, QT Imaging entered into a Management Services Agreement (the “Agreement”) and a Business Associate Agreement with John C. Klock, M.D., a California sole proprietorship operating as the QT Imaging Center (the “Practice”). John C. Klock, M.D. was the Chief Executive Officer of QT Imaging, serves on its Board of Directors, and was the largest single stockholder of QT Imaging. The Practice provided medical imaging to patients using the QT Breast Scanner. Under the terms of the Agreement, the Company agreed to provide business services to the Practice including use of the facility which formerly operated as the Marin Breast Health Trial Center, including furniture and medical equipment, as well as use of certain personnel. In exchange for those services, the Practice agreed to pay the Company a management fee. Fees paid to QT Imaging during the three months ended September 30, 2024 and 2023 were $ 0and $ 12,000, respectively. Fees paid to QT Imaging during the nine months ended September 30, 2024 and 2023 were $ 12,000and $ 36,000, respectively. These fees were recorded as a reduction to selling, general and administrative expenses on the condensed consolidated statements of operations and comprehensive loss. During the three and nine months ended September 30, 2024 and 2023, there

<div align='center'>F-62</div>

#### QT IMAGING HOLDINGS, INC.

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

were no significant