Company: QTIWW
Filing Date: 2025-02-05
Form Type: 424B3
Source: 0001628280-25-004061
Chunk: 402

Company: QT IMAGING HOLDINGS, INC.
Filing Date: 2025-02-05
Form: 424B3
Chunk 402
---
 depreciation |     |           |             |   |         -4,070,679 |     |   |        -4,722,729 |
|                                |     |           |             | $ |            122,152 |     | $ |           490,920 |

Depreciation expense was $19,508 and $76,351 for the three months ended September 30, 2024 and 2023, respectively. Depreciation expense was $114,144 and $216,272 for the nine months ended September 30, 2024 and 2023, respectively.

#### 6.

#### Intangible Assets, Net
Intangible assets, net consisted of the following as of September 30, 2024:

|         |     | Useful 
 Life   |     |          |     | Gross          
 Carrying Value |           |     | Accumulated  
 Amortization |           |     | Net Carrying 
 Value        |   |     | Useful Life 
 Remaining   |     |            |
|:--------|:----|:-------|:----|:---------|:----|:---------------|----------:|:----|:-------------|----------:|:----|:-------------|:--|:----|:------------|:----|:-----------|
| Patents |     |        |     | 12 Years |     | $              | 2,230,570 |     | $            | 2,230,570 |     | $            | — |     |             |     | 0.00 Years |

<div align='center'>F-50</div>

#### QT IMAGING HOLDINGS, INC.

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

Intangible assets, net consisted of the following as of December 31, 2023:

|         |     | Useful 
 Life   |     |          |     | Gross Carrying 
 Value          |           |     | Accumulated  
 Amortization |           |     | Net Carrying 
 Value        |        |     | Useful Life 
 Remaining   |     |            |
|:--------|:----|:-------|:----|:---------|:----|:---------------|----------:|:----|:-------------|----------:|:----|:-------------|-------:|:----|:------------|:----|:-----------|
| Patents |     |        |     | 12 Years |