Company: QTIWW
Filing Date: 2025-12-31
Form Type: 424B3
Source: 0001628280-25-059235
Chunk: 333

Company: QT IMAGING HOLDINGS, INC.
Filing Date: 2025-12-31
Form: 424B3
Chunk 333
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 For the purposes of the diluted net loss per share calculation, common stock equivalents are considered to be potentially dilutive securities.

Reconciliation of net loss per share for the years ended December 31, 2024 and 2023 is as follows:

|                                                                                            |     | Year Ended December 31, |        2024 |     |   |       2023 |
|:-------------------------------------------------------------------------------------------|:----|:------------------------|------------:|:----|:--|-----------:|
| Net loss and comprehensive loss attributable to QT Imaging Holdings, Inc.                  |     | $                       |  -8,984,880 |     | $ | -6,098,951 |
| Deemed dividend related to the modification of equity classified warrants                  |     |                         |  -5,185,502 |     |   |          — |
| Net loss attributable to common stockholders                                               |     | $                       | -14,170,382 |     | $ | -6,098,951 |
| Weighted-average number of common shares used in computing net loss per common share(1)(2) |     |                         |   6,659,288 |     |   |  3,180,067 |
| Net loss per share - basic and diluted(1)(2)                                               |     | $                       |       -2.13 |     | $ |      -1.92 |

The following securities were excluded from the calculation of net loss per share because the inclusion would be anti-dilutive as of December 31, 2024 and 2023:

|                                                                |     |     | December 31, 2024 |     |     | December 31, 2023 |
|:---------------------------------------------------------------|:----|:----|------------------:|:----|:----|------------------:|
| Common stock warrants(1)(2)                                    |     |     |         9,421,526 |     |     |           140,688 |
| Potential shares from Pre-Paid Advance(2)                      |     |     |         5,663,743 |     |     |                 — |
| Merger consideration earnout shares(2)                         |     |     |         2,000,000 |     |     |                 — |
| Potential shares from Cable Car Loan(2)                        |     |     |           250,000 |     |     |                 — |
| Potential shares from convertible notes(1)(2