Company: QTIWW
Filing Date: 2025-09-02
Form Type: 8-K/A
Source: 0001844505-25-000121
Chunk: 0

Company: QT IMAGING HOLDINGS, INC.
Filing Date: 2025-09-02
Form: 8-K/A
Chunk 0
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### UNITED STATES

### SECURITIES AND EXCHANGE COMMISSION

#### Washington, D.C. 20549
#### _________________________________________

#### FORM 8-K/A
<div align='center'>(Amendment No. 1)</div>

#### _________________________________________

### CURRENT REPORT

#### Pursuant to Section 13 or 15(d)

#### of the Securities Exchange Act of 1934
<div align='center'>Date of Report (Date of earliest event reported) August 29, 2025

________________________________________________________</div>

#### QT IMAGING HOLDINGS, INC.
<div align='center'>(Exact name of Registrant as Specified in Charter)

________________________________________________________</div>

| Delaware                                                     |     | 001-40839    |     | 86-1728920             |
| (State or Other Jurisdiction of                              |     | (Commission  |     | (IRS Employer          |
| Incorporation or Organization)                               |     | File Number) |     | Identification Number) |
| 3 Hamilton Landing,Suite 160                                 |     |              |     |                        |
| Novato,CA94949                                               |     |              |     |                        |
| (Address of principal executive offices, including Zip Code) |     |              |     |                        |
| (650)276-7040                                                |     |              |     |                        |
| (Registrant's telephone number, including area code)         |     |              |     |                        |

<div align='center'>________________________________________________________</div>

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions ( see General Instruction A.2. below):

| o |     | Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425)                  |
| o |     | Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12)                 |
| o |     | Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b)) |
| o |     | Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c)) |

Securities registered pursuant to Section 12(b) of the Act:

| Title of each class |     | Trading