Company: QTIWW
Filing Date: 2025-12-31
Form Type: 424B3
Source: 0001628280-25-059235
Chunk: 445

Company: QT IMAGING HOLDINGS, INC.
Filing Date: 2025-12-31
Form: 424B3
Chunk 445
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 of the Yorkville Note received from Yorkville (see Note 7). In connection with the issuance of the Lynrock Lake Term Loan, on February 26, 2025, the maturity date on the Working Capital Note was extended to October 1, 2027.

<div align='center'>F-80</div>

#### QT IMAGING HOLDINGS, INC.

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

#### Private Placement
On April 24, 2025, the Company completed the First Securities Purchase Agreement for net proceeds of $500,000 in exchange for a total of 261,644 shares of the Company’s common stock and warrants to purchase 523,286 shares of common stock that are issuable upon exercise. See Note 10, Stockholders’ Deficit.

#### 15.

#### Segment Information
The Company has one operating and reportable segment, which is engaged in the development and commercialization of the Company’s QT Breast Scanner. The Company’s Chief Executive Officer has been determined to be the chief operating decision maker (“CODM”) in accordance with the authoritative guidance on segment reporting. The CODM assesses performance, makes operating decisions and decides how to allocate resources based on net loss that is reported on the consolidated statements of operations and comprehensive loss. The measure of segment assets is reported on the condensed consolidated balance sheets as total consolidated assets.

The following table presents information about reported segment revenue, significant segment expenses, and segment net loss for the three and nine months ended September 30, 2025 and 2024:

|                                              |     | 2025 | Three Months Ended 
      September 30, |     | 2024 |            |     | 2025 | Nine Months Ended 
     September 30, |     | 2024 |            |
|:---------------------------------------------|:----|:-----|-------------------:|:----|:-----|-----------:|:----|:-----|------------------:|:----|:-----|-----------:|
| Revenue                                      |     | $    |          4,192,101 |     | $    |    955,970 |     | $    |        10,649,930 |     | $    |  4,032,168 |
| Less:                                        |     |      |                    |     |      |            |     |      |                   |     |      |            |
| Cost of revenue(1)