Company: QTIWW
Filing Date: 2025-02-05
Form Type: 424B3
Source: 0001628280-25-004061
Chunk: 355

Company: QT IMAGING HOLDINGS, INC.
Filing Date: 2025-02-05
Form: 424B3
Chunk 355
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 by the difference between the fair market value of the shares and the exercise price, divided by the fair market value of the shares.

<div align='center'>F-19</div>

#### QT IMAGING, INC.

### NOTES TO CONSOLIDATED FINANCIAL STATEMENTS
<div align='center'>For the years ended December 31, 2023 and 2022</div>

The following table represents the warrant activity as follows:

|                                |     | Number of Warrants |     |           |
| Outstanding, January 1, 2022   |     |                    |     |   624,508 |
| Granted                        |     |                    |     |   280,962 |
| Outstanding, December 31, 2022 |     |                    |     |   905,470 |
| Granted                        |     |                    |     |   326,104 |
| Outstanding, December 31, 2023 |     |                    |     | 1,231,574 |

As of December 31, 2023, outstanding warrants to purchase shares of common stock by exercise price are as follows:

| Exercise Price |       |     | Exercisable For |     | Expiration Date(s)          |     | Number of      
 Shares         
 Outstanding    
 Under Warrants |     |           |
|:---------------|------:|:----|:----------------|:----|:----------------------------|:----|:---------------|:----|----------:|
| $              | 10.00 |     | Common Stock    |     | March 2025                  |     |                |     |   516,391 |
| $              |  8.50 |     | Common Stock    |     | August 2030                 |     |                |     |   150,000 |
| $              |  4.25 |     | Common Stock    |     | July 2027 to September 2028 |     |                |     |    10,329 |
| $              |  4.00 |     | Common Stock    |     | November 2027 to March 2029 |     |                |     |   494,525 |
| $              |  2.50 |     | Common Stock    |     | November 1, 2028            |     |                |     |    60,329 |
|                |       |     |                 |     |                             |     |                |     | 1