# EDGAR Filing Document

**Accession Number:** 0001844505
**File Stem:** 0001628280-26-022574
**Filing Date:** 2026-4
**Character Count:** 2215
**Document Hash:** ae2f592479756ce83ceeba4fd770ef79
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0001628280-26-022574.hdr.sgml**: 20260501

**ACCESSION NUMBER**: 0001628280-26-022574

**CONFORMED SUBMISSION TYPE**: CORRESP

**PUBLIC DOCUMENT COUNT**: 1

**FILED AS OF DATE**: 20260401

**FILER**: 

**COMPANY DATA:**
- **COMPANY CONFORMED NAME:** QT IMAGING HOLDINGS, INC.
- **CENTRAL INDEX KEY:** 0001844505
- **STANDARD INDUSTRIAL CLASSIFICATION:** ELECTROMEDICAL & ELECTROTHERAPEUTIC APPARATUS [3845]
- **ORGANIZATION NAME:** 08 Industrial Applications and Services
- **EIN:** 861728920
- **STATE OF INCORPORATION:** DE
- **FISCAL YEAR END:** 1231

**FILING VALUES:**
- **FORM TYPE:** CORRESP

**BUSINESS ADDRESS:**
- **STREET 1:** 3 HAMILTON LANDING
- **STREET 2:** SUITE 160
- **CITY:** NOVATO
- **STATE:** CA
- **ZIP:** 94949
- **BUSINESS PHONE:** 415-842-7250

**MAIL ADDRESS:**
- **STREET 1:** 3 HAMILTON LANDING
- **STREET 2:** SUITE 160
- **CITY:** NOVATO
- **STATE:** CA
- **ZIP:** 94949

**FORMER COMPANY:**
- **FORMER CONFORMED NAME:** GigCapital5, Inc.
- **DATE OF NAME CHANGE:** 20210204

**QT Imaging Holdings, Inc.**

c/o DLA Piper LLP (US)

555 Mission Street, Suite 2400

San Francisco, California 94105-2933

(415) 836-2533

April 1, 2026

**Via EDGAR**

U.S. Securities and Exchange Commission

Division of Corporation Finance

100 F Street, NE

Washington, DC 20549

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| | |
|:---|:---|
| **Re:** | **QT Imaging Holdings, Inc.** |
| | **Registration Statement on Form S-3** |
| | **File No. 333-294705** |
| | **Acceleration Request** |

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Ladies and Gentlemen:

Pursuant to Rule 461 promulgated under the Securities Act of 1933, as amended, QT Imaging Holdings, Inc. hereby requests that the effectiveness of the above-referenced Registration Statement be accelerated so that such Registration Statement will become effective at 4:00 p.m., Eastern Time, on Friday, April 3, 2026, or as soon thereafter as practicable.

Please notify Elena Nrtina, counsel to the company, at (415) 836-2533, as soon as the Registration Statement has been declared effective, or if you have any other questions or concerns regarding this matter.

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| |
|:---|
| Sincerely, |
| /s/ Dr. Raluca Dinu |
| Name: Dr. Raluca Dinu<br>Title: Chief Executive Officer |

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