Company: QTIWW
Filing Date: 2025-02-05
Form Type: 424B3
Source: 0001628280-25-004061
Chunk: 3

Company: QT IMAGING HOLDINGS, INC.
Filing Date: 2025-02-05
Form: 424B3
Chunk 3
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| WHERE YOU CAN FIND MORE INFORMATION                                                   |     |  215 |
| INDEX TO FINANCIAL STATEMENTS                                                         |     |  F-1 |

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#### Table of Contents

### ABOUT THIS PROSPECTUS
This prospectus is part of a registration statement on Form S-1 that we filed with the Securities and Exchange Commission (the “

#### SEC
”) using the “shelf” registration process. Under this shelf registration process, the Selling Securityholders may, from time to time, sell the securities offered by them described in this prospectus. We will not receive any proceeds from the sale by such Selling Securityholder of the securities offered by them described in this prospectus. This prospectus also relates to the issuance by us of the shares of the Common Stock issuable upon the exercise of any PIPE Warrants. We will not receive any proceeds from the sale of shares of the Common Stock underlying the PIPE Warrants pursuant to this prospectus, except with respect to amounts received by us upon the exercise of the PIPE Warrants for cash. The exercise of the PIPE Warrants, and any proceeds we may receive from their exercise, are highly dependent on the price of the shares of the Common Stock and the spread between the exercise price of the PIPE Warrants and the price of the Common Stock at the time of exercise. If the market price of the Common Stock is less the exercise price of a holder’s PIPE Warrants, it is unlikely that holders will exercise their PIPE Warrants. There can be no assurance that the PIPE Warrants will be in the money prior to their expiration.

Neither we nor the Selling Securityholders have authorized anyone to provide you with any information or to make any representations other than those contained in this prospectus or any applicable prospectus supplement or any free writing prospectuses prepared by or on behalf of us or to which we have referred you. Neither we nor the Selling Securityholders take responsibility for, or provide any assurance as to the reliability of, any other information that others may give you. Neither we nor the Selling Securityholders will make an offer to sell these securities in any jurisdiction where the offer or sale is not permitted. You should not assume that the information contained in this prospectus is accurate as of any date other than the date of this prospectus. Our business, financial condition, results of operations and prospects may have changed since that date.

We may also provide a prospectus supplement or post-effective amendment to the registration statement to add information to,