Company: QTIWW
Filing Date: 2025-01-10
Form Type: 424B3
Source: 0001844505-25-000004
Chunk: 7

Company: QT IMAGING HOLDINGS, INC.
Filing Date: 2025-01-10
Form: 424B3
Chunk 7
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 Note, or the priority thereof, such that those liens, security interests and rights, as well as all rights, remedies, titles, liens and equities securing the Cable Car Note and indebtedness as modified are ratified, confirmed, renewed and extended in all respects. Any event of default under the Cable Car Amendment shall constitute an Event of Default under the Investor Note.

The Cable Car Amendment is a modification only and not a novation, such that it shall be considered attached to the Cable Car Note and made a part thereof, and shall not release or affect the liability of any guarantor, surety or endorser of the Cable Car Note, or release any owner of collateral securing the Cable Car Note, such that the validity, priority and enforceability thereof shall not be impaired.

This Current Report provides a summary of the Cable Car Amendment, the description of which does not purport to be complete and is qualified in its entirety by the terms and conditions of such agreement. A copy of the Cable Car Amendment is filed as Exhibit 10.2 hereto and is incorporated by reference into this Current Report.

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

| Exhibit No. 
 10.1        
 10.2        |     | Description                                                                                                 
 Third Omnibus Amendment, dated January 9, 2025, by and between QT Imaging Holdings, Inc. and YA II PN, LTD. 
 Omnibus Amendment, dated January 9, 2025, by and between QT Imaging Holdings, Inc. and Funicular Funds, LP  |
|:------------|:----|:------------------------------------------------------------------------------------------------------------|
| 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 10, 2025 |     | QT Imaging Holdings, Inc. |     |                         |
|:-------|:----|:-----------------|:----|:--------------------------|:----|:------------------------|
|        |     |                  |     | By:                       |     | /s/ Raluca Dinu         |
|        |     |                  |     | Name:                     |     | Raluca Dinu             |
|        |     |                  |     | Title