Company: QTIWW
Filing Date: 2025-07-17
Form Type: DEF 14A
Source: 0001844505-25-000069
Chunk: 0

Company: QT IMAGING HOLDINGS, INC.
Filing Date: 2025-07-17
Form: DEF 14A
Chunk 0
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#### TABLE OF CONTENTS

### 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)) |
| x |     | Definitive Proxy Statement                                                      |
| o |     | 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. |

#### TABLE OF CONTENTS
July 17, 2025

Dear Stockholder:

You are cordially invited to attend this year’s Annual Meeting of Stockholders of QT Imaging Holdings, Inc. on August 19, 2025 at 1:00 p.m., Eastern Time. The meeting will be held virtually, at www.virtualshareholdermeeting.com/QTI2025. The meeting will comprise a discussion and voting on the matters set forth in the accompanying Notice of Annual Meeting of Stockholders.

The Notice of Annual Meeting of Stockholders and a Proxy Statement, which describe the formal business to be conducted at the meeting, accompany this letter. A copy of our Annual Report on Form 10-K is also enclosed for your information.

The matters to be acted upon are described in the Notice of Annual Meeting of Stockholders and Proxy Statement.

Whether or not you plan to attend the meeting, your vote is very important and we encourage you to vote promptly. You may vote by proxy over the Internet, or you can also vote