Company: QTIWW
Filing Date: 2025-01-16
Form Type: S-1
Source: 0001628280-25-001723
Chunk: 388

Company: QT IMAGING HOLDINGS, INC.
Filing Date: 2025-01-16
Form: S-1
Chunk 388
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 from the debt instrument.

In November 2023 and in connection with the Fourth Amendment and issuance of the senior secured convertible promissory note to US Capital as part of the Securities Purchase Agreement as described below (the “US Capital Note”), the outstanding loan balances of the Note of $ 2,495,000with accrued interest of $ 635,854were considered extinguished. In November 2023, the Company recorded $ 376,086as a loss on extinguishment in other income (expense), net in the condensed consolidated statements of operations and comprehensive loss, and includes a commission paid of $ 20,000, remaining unamortized debt issuance costs on the Note of $ 32,828and the fair value of warrants to purchase 16,320shares of common stock of $ 156,505.

As of December 31, 2023, the total Note and US Capital Note balance was $ 3,294,659net of unamortized debt issuance costs of $ 36,194, and accrued interest of $ 50,037. Interest expense, including amortization of debt issuance costs, for the three and nine months ended September 30, 2024 was $ 0 and $ 88,692, respectively. Interest expense, including amortization of debt issuance costs, for the three and nine months ended September 30, 2023 was $ 86,238and $ 256,253, respectively.

On March 4, 2024, the Note principal and related accrued interest balance of $ 3,233,388 and the US Capital Note principal balance of $ 200,000was converted into 359,266and 100,000shares of common stock, respectively. Additionally, warrants to purchase 16,320shares of the Company's common stock were net settled into 5,594shares of common stock.

Bridge Loan

In November 2023, the Company entered into a Securities Purchase Agreement and raised a private secured convertible bridge financing in the aggregate amount of $ 1,000,000(“Bridge Loan”) from fiveinvestors (“Bridge Lenders”). Each Bridge Loan of $ 200,000bore nointerest but had a cash option value at the date of maturity of

<div align='center'>F-52</div>

#### QT IMAGING HOLDINGS, INC.

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

120%, or $ 240,000