Company: QTIWW
Filing Date: 2025-08-07
Form Type: DEFA14A
Source: 0001844505-25-000081
Chunk: 0

Company: QT IMAGING HOLDINGS, INC.
Filing Date: 2025-08-07
Form: DEFA14A
Chunk 0
---
### UNITED STATES

### SECURITIES AND EXCHANGE COMMISSION

#### Washington, D.C. 20549

#### SCHEDULE 14A INFORMATION

#### PROXY STATEMENT PURSUANT TO SECTION 14(a) OF THE

#### SECURITIES EXCHANGE ACT OF 1934
<div align='center'>(Amendment No. )</div>

Filed by the Registrant x

Filed by a party other than the Registrant o

Check the appropriate box:

| o |     | Preliminary Proxy Statement                                                     |
| o |     | Confidential, for Use of the Commission Only (as permitted by Rule 14a-6(e)(2)) |
| o |     | Definitive Proxy Statement                                                      |
| x |     | Definitive Additional Materials                                                 |
| o |     | Soliciting Material under §240.14a-12                                           |

| QT Imaging Holdings, Inc.                                                |
| (Name of Registrant as Specified in its Charter)                         |
| (Name of Person(s) Filing Proxy Statement, if other than the Registrant) |

Payment of Filing Fee (Check all boxes that apply):

| x |     | No fee required.                                                                                     |
| o |     | Fee paid previously with preliminary materials.                                                      |
| o |     | Fee computed on table in exhibit required by Item 25(b) per Exchange Act Rules 14a-6(i)(1) and 0-11. |

<div align='center'>QT Imaging Announces Continuous Strong Revenue Growth and Enhanced Balance Sheet in the Second Quarter 2025

Generated Revenue of $3.7 Million with 50% Gross Margin

The Company Pursuing Uplisting to Nasdaq

Addressed and Removed the Warrant Liability Through Amendments to the Lynrock Lake and Yorkville Warrant Agreements

Announces New 'QTI Cloud Platform' as it Accelerates Its Transformation into a Precision Imaging AI Company</div>

#### NOVATO, CA – Aug 7, 2025
– QT Imaging Holdings, Inc. (OTCQB: QTIH) (“

#### QT Imaging
” or the “

#### Company
”), a medical device company engaged in research, development, and commercialization of innovative body imaging systems, today announced financial results for the three and six months ended June 30, 2025, and provided a business update.

“We are pleased to report that the strong business momentum from the first quarter carried through Q2, and in many ways, we