Company: QTIWW
Filing Date: 2025-01-31
Form Type: S-1/A
Source: 0001628280-25-003316
Chunk: 425

Company: QT IMAGING HOLDINGS, INC.
Filing Date: 2025-01-31
Form: S-1/A
Chunk 425
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 30, 2024 , the Company incurred costs of $ 36,226 , of which $ 20,430 of grant income was recognized as an offset to research and development expense and $ 15,796 was recognized as an offset to selling, general and administrative expense in the condensed consolidated statements of operations and comprehensive loss. During the nine months ended September 30, 2023, the Company incurred costs of $ 250,713 , of which $ 215,616 of grant income was recognized as an offset to research and development expense and $ 35,097 was recognized as an offset to selling, general and administrative expense in the condensed consolidated statements of operations and comprehensive loss. As of September 30, 2024 and December 31, 2023 , the grant receivable was $ 10,349and $ 161,638, respectively, and is included in prepaid expenses and other current assets on the condensed consolidated balance sheets.

#### 14.

#### Income Taxes
For the interim periods, the Company estimates its annual effective income tax rate and applies the estimated rate to the year-to-date income or loss before taxes. The Company also computes the tax provision or benefit related to items reported separately and recognizes the effect of changes in enacted tax laws or rates in the interim periods in which the changes occur.

The Company’s effective tax rate is 0% for the three and nine months ended September 30, 2024 and 2023. The Company expects that its effective tax rate for the full year 2024 will be 0%.

<div align='center'>F-61</div>

#### QT IMAGING HOLDINGS, INC.

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

#### 15.

#### Related Party Transactions
Convertible Notes Payable

In July 2020, the Company issued threeconvertible notes to threeof its stockholders for advances up to $ 3,500,000in principal (the “2020 Notes”) and bearing annual interest of 5% on any amounts drawn. An additional note was issued in March 2022 as part of the 2020 Notes, but with an annual interest rate of 8%. All principal and interest payments are due on or before July 1, 2025. The 2020 Notes are convertible, at the holder’s option, into shares of common stock of the Company at the lower of $ 14.59per share or the offering price in a financing