Company: QTIWW
Filing Date: 2025-12-31
Form Type: 424B3
Source: 0001628280-25-059235
Chunk: 351

Company: QT IMAGING HOLDINGS, INC.
Filing Date: 2025-12-31
Form: 424B3
Chunk 351
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, 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 |

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 |     | $              | 2,230,570 |     | $            | 2,140,431 |     | $            | 90,139 |     |             |     | 0.50 Years |

Amortization expense was $90,139 and $185,881 for each of the years ended December 31, 2024 and 2023.

#### 7. Balance Sheet Details
Prepaid expenses and other current assets consisted of the following as of December 31, 2024 and 2023:

|                   |     |   | December 31, 2024 |     |   | December 31, 2023 |
|:------------------|:----|:--|------------------:|:----|:--|------------------:|
| Prepaid insurance |     | $ |           179,143 |     | $ |             9,808 |
| Other