Company: QTIWW
Filing Date: 2025-01-16
Form Type: S-1
Source: 0001628280-25-001723
Chunk: 344

Company: QT IMAGING HOLDINGS, INC.
Filing Date: 2025-01-16
Form: S-1
Chunk 344
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2022 |
|:------------------------------------------------|:----|:--|-------:|:----|:--|-------:|
| Balance as the beginning of the year            |     | $ | 49,255 |     | $ |      — |
| Increases related to prior year tax positions   |     |   |      — |     |   | 47,882 |
| Increases related to current year tax positions |     |   |      — |     |   |  1,373 |
| Balance as the end of the year                  |     | $ | 49,255 |     | $ | 49,255 |

The unrecognized tax benefits for the year ended December 31, 2023, if recognized, would not affect the effective income tax rate due to the valuation allowance that currently offsets the deferred tax assets. It is reasonably possible that the unrecognized tax benefits balance will change within twelve months by a range of zeroto $ 49,255due to the Company’s intent to file a tax accounting method change.

The Company files income tax returns in the federal and California state jurisdictions. The Company’s tax years for 2020 and forward are subject to examination by the federal and California tax authorities.

#### 13.

#### Related Party Transactions
Convertible Notes Payable

In July 2020, the Company issued three convertible notes to three of 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 $ 5.00per share or the offering price in a financing of at

<div align='center'>F-24</div>

#### QT IMAGING, INC.

### NOTES TO CONSOLIDATED FINANCIAL STATEMENTS
<div align='center'>For the years ended December 31, 2023 and 2022</div>

least $ 5,000,000in equity from unaffiliated parties. As of December 31, 2023, an aggregate of 704,299shares of common stock would be issued if the entire principal and interest under the 2020 Notes was converted. Management