Company: QTIWW
Filing Date: 2025-12-29
Form Type: S-1/A
Source: 0001628280-25-058960
Chunk: 370

Company: QT IMAGING HOLDINGS, INC.
Filing Date: 2025-12-29
Form: S-1/A
Chunk 370
---
      | 5.7 |
| Expected volatility            |     |   | 67.9 |   % |
| Risk-free rate of return       |     |   |  4.3 |   % |
| Expected annual dividend yield |     |   |    — |   % |

Option pricing models require the input of various subjective assumptions, including the option’s expected life and the price volatility of the underlying stock. The expected stock price volatility is based on the analysis of volatilities of the Company’s selected public peer group over a period commensurate with the expected term of the options. The expected term of employee options represents the weighted-average period the options are expected to remain outstanding and was derived using the simplified method for awards that qualify for its “plain-vanilla” options. All awards that are outstanding are qualified for “plain-vanilla” options. The risk-free interest rate is based on the U.S. Treasury interest rates whose term in consistent with the expected life of the stock options. No dividend yield is included as the Company has not issued any dividends and do not anticipate issuing any dividends in the future.

<div align='center'>F-37</div>

#### QT IMAGING HOLDINGS, INC.

### Notes to Consolidated Financial Statements
The following table shows stock-based compensation expense by functional area in the consolidated statements of operations and comprehensive loss for the years ended December 31, 2024 and 2023:

|                                     |     | Year Ended December 31, |    2024 |     |   |    2023 |
|:------------------------------------|:----|:------------------------|--------:|:----|:--|--------:|
| Research and development            |     | $                       |  58,270 |     | $ | 105,255 |
| Selling, general and administrative |     |                         | 231,525 |     |   | 604,139 |
|                                     |     | $                       | 289,795 |     | $ | 709,394 |

Nostock-based compensation expense was capitalized to inventory for years ended December 31, 2024 and 2023.

As of December 31, 2024, the total unrecognized compensation cost related to all nonvested stock options was $ 758,294and the weighted-average period over which it is expected to be recognized is 2.1years.

#### 13. National Institutes of Health Subaward
On August 18, 2022, the