Company: QTIWW
Filing Date: 2025-12-31
Form Type: 424B3
Source: 0001628280-25-059235
Chunk: 410

Company: QT IMAGING HOLDINGS, INC.
Filing Date: 2025-12-31
Form: 424B3
Chunk 410
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 Statements
<div align='center'>(Unaudited)</div>

|                                |     |   | February 26, 2025 |   |     |   | June 11, 2025 |   |
|:-------------------------------|:----|:--|------------------:|:--|:----|:--|--------------:|:--|
| Fair value of common stock     |     | $ |              1.20 |   |     | $ |          1.50 |   |
| Exercise price                 |     | $ |              1.20 |   |     | $ |          1.20 |   |
| Expected warrant term (years)  |     |   |               5.0 |   |     |   |           4.7 |   |
| Expected volatility            |     |   |              51.6 | % |     |   |          39.2 | % |
| Risk-free rate of return       |     |   |               4.1 | % |     |   |           4.0 | % |
| Expected annual dividend yield |     |   |                 — | % |     |   |             — | % |

The activity for the fair value of the Yorkville Warrant during the three and nine months ended September 30, 2025 were as follows:

| Beginning balance, January 1, 2025                              |     | Yorkville Warrant |          — |           |
|:----------------------------------------------------------------|:----|:------------------|-----------:|----------:|
| Fair value at issuance                                          |     |                   |            | 2,992,522 |
| Change in fair value                                            |     |                   |    111,795 |           |
| Ending balance, March 31, 2025                                  |     |                   |  3,104,317 |           |
| Change in fair value                                            |     |                   |    484,872 |           |
| Reclassification of warrant liability upon warrant modification |     |                   | -3,589,189 |           |
| Ending balance, June 30, 2025 and September 30, 2025            |     | $                 |          — |           |

#### Earnout Liability
The fair value of the Merger Consideration Earnout shares was calculated using a Monte Carlo simulation. The simulation used as significant inputs the Company's management’s current assessment of placements of breast scanning systems in