Company: QTIWW
Filing Date: 2025-12-31
Form Type: 424B3
Source: 0001628280-25-059235
Chunk: 378

Company: QT IMAGING HOLDINGS, INC.
Filing Date: 2025-12-31
Form: 424B3
Chunk 378
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 net loss that is reported on the consolidated statements of operations and comprehensive loss. The measure of segment assets is reported on the consolidated balance sheets as total consolidated assets.

The following table presents information about reported segment revenue, significant segment expenses, and segment net loss for the years ended December 31, 2024 and 2023:

|                                              |     | Year Ended December 31, |       2024 |     |   |       2023 |
|:---------------------------------------------|:----|:------------------------|-----------:|:----|:--|-----------:|
| Revenue                                      |     | $                       |  4,878,665 |     | $ |     40,355 |
| Less:                                        |     |                         |            |     |   |            |
| Cost of revenue                              |     |                         |  2,238,820 |     |   |    134,988 |
| Research and development(1)                  |     |                         |  3,267,340 |     |   |  1,485,636 |
| Selling, general and administrative(1)       |     |                         | 11,549,512 |     |   |  3,427,690 |
| Other expense, net                           |     |                         |    560,648 |     |   |    544,566 |
| Change in fair value of warrant liability    |     |                         |   -187,173 |     |   |          — |
| Change in fair value of derivative liability |     |                         | -4,817,600 |     |   |          — |
| Change in fair value of earnout liability    |     |                         | -3,230,000 |     |   |          — |
| Interest expense, net                        |     |                         |  4,497,781 |     |   |    544,826 |
| Income tax expense (benefit)                 |     |                         |    -15,783 |     |   |      1,600 |
| Consolidated net loss                        |     | $                       | -8,984,880 |     | $ | -6,098,951 |

<div align='center'>F-42</div>

#### QT IMAGING HOLDINGS, INC.

### Notes to Consolidated Financial Statements
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(1) Includes total salaries, bonuses, employee benefits and stock-based compensation of $4,917,502 and $2,062,