Company: QTIWW
Filing Date: 2025-08-28
Form Type: S-8
Source: 0001844505-25-000112
Chunk: 0

Company: QT IMAGING HOLDINGS, INC.
Filing Date: 2025-08-28
Form: S-8
Chunk 0
---
<div align='center'>As filed with the Securities and Exchange Commission on August 28, 2025</div>

#### Registration No. 333-

### UNITED STATES

### SECURITIES AND EXCHANGE COMMISSION

#### Washington, D.C. 20549

#### FORM S-8

### REGISTRATION STATEMENT

#### UNDER

#### THE SECURITIES ACT OF 1933

#### QT Imaging Holdings, Inc.
<div align='center'>(Exact name of registrant as specified in its charter)</div>

| Delaware                        |     | 86-1728920            |
| (State or other jurisdiction of 
 incorporation or organization)  |     | -I.R.S. Employer      
 Identification Number |

#### 3 Hamilton Landing, Suite 160

#### Novato, CA 94949
(650) 276-7040

<div align='center'>(Address, including Zip Code, of Principal Executive Offices)

QT Imaging Holdings, Inc. Inducement Equity Incentive Plan

(Full title of the plan)</div>

#### Dr. Raluca Dinu

#### Chief Executive Officer

#### 3 Hamilton Landing, Suite 160

#### Novato, CA 94949
(650) 276-7040

<div align='center'>(Name, address, including zip code, and telephone number, including area code, of agent for service)

Copy to:</div>

#### Jeffrey C. Selman
DLA Piper LLP (US)

#### 555 Mission Street, Suite 2400

#### San Francisco, CA 94105
<div align='center'>(415) 615-6095</div>

Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, a smaller reporting company, or an emerging growth company. See the definitions of “large accelerated filer,” “accelerated filer,” “smaller reporting company” and “emerging growth company” in Rule 12b-2 of the Exchange Act:

| Large accelerated filed |     | ☐ |     | Accelerated filer         |     | ☐ |
| Non-accelerated filer   |     | ☒ |     | Smaller reporting company |     | ☒ |
|                         |     |   |     | Emerging growth company   |     | ☒ |

If an emerging growth company, indicate by check mark if the registrant has elected not to use the