Company: QTIWW
Filing Date: 2025-12-31
Form Type: 424B3
Source: 0001628280-25-059235
Chunk: 446

Company: QT IMAGING HOLDINGS, INC.
Filing Date: 2025-12-31
Form: 424B3
Chunk 446
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(1) I ncludes total salaries, bonuses, employee benefits and stock-based compensation of $2,148,939 and $1,627,803 for the three months ended September 30, 2025 and 2024, respectively. Total salaries, bonuses, employee benefits and stock-based compensation were $5,537,784 and $3,765,568 for the nine months ended September 30, 2025 and 2024, respectively.

All of the Company’s long-lived assets are located in the United States.

Refer to Note 12, Revenue Recognition, for revenue by geography information.

#### 16.

#### Revised Financial Statements
As previously disclosed in its consolidated financial statements included in the Annual Report on Form 10-K filed for the year ended December 31, 2024, the Company has revised its condensed financial statements as of and for the nine months ended September 30, 2024 to correct a misstatement identified related to the initial recognition of the earnout liability. The Company assessed the materiality of this misstatement in accordance with SEC Staff Accounting Bulletin No. 108 - “Qualifying Misstatements” and concluded this error was not qualitatively material. As such, the correction of the error for the affected periods is reflected prospectively in the Quarterly Reports on Form 10-Q for fiscal year 2025.

<div align='center'>F-81</div>

#### QT IMAGING HOLDINGS, INC.

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

The effects of this revision on the applicable line items within the condensed consolidated financial statements were as follows:

|                            | Condensed Consolidated Balance Sheet Line Items Impacted |   | September 30, 2024 - As Filed |     |   | Adjustments |     |   | September 30, 2024 - As Revised |
|:---------------------------|:---------------------------------------------------------|:--|------------------------------:|:----|:--|------------:|:----|:--|--------------------------------:|
| Additional paid-in capital |                                                          | $ |                    22,470,230 |     | $ |  -3,670,000 |     | $ |                      18,800,230 |
| Accumulated deficit        |                                                          | $ |                   -32,122,605 |     | $ |   3,670,000 |     | $ |                     -28,452,605 |

|                                                                           | Other Condensed Consolid