Company: QTIWW
Filing Date: 2025-12-31
Form Type: 424B3
Source: 0001628280-25-059235
Chunk: 438

Company: QT IMAGING HOLDINGS, INC.
Filing Date: 2025-12-31
Form: 424B3
Chunk 438
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 30, 2025 |     |           | 108,333 |   |     | $              | 7.47 |      |     |                  |     | 9.9 |

<div align='center'>F-77</div>

#### QT IMAGING HOLDINGS, INC.

### Notes to Condensed Consolidated Financial Statements
<div align='center'>(Unaudited)</div>

2024 Equity Incentive Plan

On January 1, 2025, an additional 446,137 shares of common stock were added to the 2024 Equity Incentive Plan.

The following table summarizes information regarding activity in the 2024 Equity Incentive Plan during the nine months ended September 30, 2025:

|                                           |     | Number of 
 Options   |           |         |     | Weighted-      
 Average        
 Exercise Price |      |     | Weighted-Average 
 Remaining        
 Contractual      
 Life (years)     |     |     |
|:------------------------------------------|:----|:----------|----------:|--------:|:----|:---------------|-----:|:----|:-----------------|:----|----:|
| Outstanding, January 1, 2025(1)(2)        |     |           |           | 651,645 |     | $              | 2.25 |     |                  |     | 9.5 |
| Granted                                   |     |           |           | 589,333 |     | $              | 2.41 |     |                  |     |     |
| Exercised                                 |     |           |           | -33,333 |     | $              | 2.25 |     |                  |     |     |
| Cancelled                                 |     |           |           | -66,667 |     | $              | 2.25 |     |                  |     |     |
| Outstanding, September 30, 2025           |     |           | 1,140,978 |         |     | $              | 2.34 |     |                  |     | 9.2 |
| Exercisable as of September 30, 2025      |     |           |   417,513 |         |     | $              | 2.16 |     |                  |     | 9.0 |
| Expected-to-vest as of September 30, 2025 |     |           |   723,465 |