Company: QTIWW
Filing Date: 2025-01-24
Form Type: 424B3
Source: 0001844505-25-000011
Chunk: 3

Company: QT IMAGING HOLDINGS, INC.
Filing Date: 2025-01-24
Form: 424B3
Chunk 3
---
, receipts or earnings, including local taxes and personal property taxes. The term of the Sublease is one year unless terminated and shall auto-renew on a month-to-month basis thereafter, unless otherwise terminated. The Sublease shall expire automatically upon the termination of the Prime Lease, which is set to terminate in April 2027.

The foregoing description is qualified in its entirety by reference to the Sublease, a copy of which is attached hereto as Exhibit 10.1 and incorporated herein by reference.

### Item 9.01 Financial Statements and Exhibits.
(d) Exhibits:

| Exhibit No. 
 10.1        |     | Description                                                                                           
 Sublease, dated as of January 23, 2025, by and among QT Imaging Holdings, Inc. and QT Imaging Center. |
|:------------|:----|:------------------------------------------------------------------------------------------------------|
| 104         |     | Cover Page Interactive Data File (embedded within the Inline XBRL document)                           |

### SIGNATURE
Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized.

| Dated: |     | January 24, 2025 |     | QT Imaging Holdings, Inc. |     |                         |
|:-------|:----|:-----------------|:----|:--------------------------|:----|:------------------------|
|        |     |                  |     | By:                       |     | /s/ Raluca Dinu         |
|        |     |                  |     | Name:                     |     | Raluca Dinu             |
|        |     |                  |     | Title:                    |     | Chief Executive Officer |