Company: QTIWW
Filing Date: 2025-11-03
Form Type: S-1
Source: 0001628280-25-048373
Chunk: 318

Company: QT IMAGING HOLDINGS, INC.
Filing Date: 2025-11-03
Form: S-1
Chunk 318
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<div align='center'>F-12</div>

#### QT IMAGING HOLDINGS, INC.

### Notes to Consolidated Financial Statements
Significant customers represent 10% or more of the Company’s total revenue or accounts receivable balance for the period ended as of each reporting date. For each significant customer, revenue as a percentage of total revenue and accounts receivable as a percentage of total accounts receivable are as follows:

|                           |     | Accounts Receivable 
 December 31,        
 2024                |    |   |     | December 31, 
 2023         |     |   |     | Revenue                 
 Year Ended December 31, 
 2024                    |    |   |     | 2023 |    |   |
|:--------------------------|:----|:--------------------|---:|:--|:----|:-------------|----:|:--|:----|:------------------------|---:|:--|:----|:-----|---:|:--|
| Customers:                |     |                     |    |   |     |              |     |   |     |                         |    |   |     |      |    |   |
| Customer A                |     |                     | 13 | % |     |              |     | * |     |                         | 70 | % |     |      |    | * |
| Customer B                |     |                     |    | * |     |              |     | * |     |                         | 19 | % |     |      |    | * |
| Customer C                |     |                     | 12 | % |     |              |     | * |     |                         |    | * |     |      |    | * |
| Customer D, related party |     |                     |    | * |     |              |     | * |     |                         |    | * |     |      | 20 | % |
| Customer E                |     |                     |    | * |     |              |     | * |     |                         |    | * |     |      | 12 | % |
| Customer F                |     |                     |    | * |     |              | 100 | % |     |                         |    | * |     |      |    | * |
| Customer G