Company: QTIWW
Filing Date: 2025-12-31
Form Type: 424B3
Source: 0001628280-25-059235
Chunk: 344

Company: QT IMAGING HOLDINGS, INC.
Filing Date: 2025-12-31
Form: 424B3
Chunk 344
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:|
| Assets:                |              |     |       |   |     |   |                   |     |   |                   |
| Certificate of deposit |              |     |       | 2 |     | $ |            20,000 |     | $ |            20,000 |
| Liabilities:           |              |     |       |   |     |   |                   |     |   |                   |
| Warrant liability      |              |     |       | 2 |     | $ |            22,234 |     | $ |                 — |
| Earnout liability      |              |     |       | 3 |     | $ |           440,000 |     | $ |                 — |
| Derivative liability   |              |     |       | 3 |     | $ |           303,300 |     | $ |                 — |

#### Warrant Liability
The Company has determined that the warrants that were a constituent part of (i) the private placement units that were issued in a private placement sale by GigCapital5 prior to the Merger (“Private Placement Warrants”) and (ii) the private placement units that were issued upon conversion of working capital notes issued by GigCapital5 prior to the Merger, which conversion occurred concurrent with the Merger (“Working Capital Note Warrants”) are subject to treatment as a liability, as the transfer of the warrants to anyone other than the purchasers or their permitted transferees would result in these warrants having substantially the same terms as the warrants included in the public units that were issued by GigCapital5 prior to the Merger (“Public Warrants”). The Company determined that the fair value of each Private Placement Warrant and the Working Capital Note Warrants approximates the fair value of a Public Warrant. Accordingly, the Private Placement Warrants and Working Capital Note Warrants are valued upo n observable data and have been classified as Level 2 financial instruments. As of December 31, 2024, a

<div align='center'>F-23</div>

#### QT IMAGING HOLDINGS, INC.

### Notes to Consolidated Financial Statements
total of 296,445 Priv ate Placement Warrants and Working Capital Note Warrants were outstanding at an approximate fair value of 0.075 per warrant. See Note 11.

The activity for the fair value of the warrant liability during the year ended December 31, 2024 was as follows:

| Beginning balance, January 1, 2024       |