Company: QTIWW
Filing Date: 2025-12-31
Form Type: 424B3
Source: 0001628280-25-059235
Chunk: 277

Company: QT IMAGING HOLDINGS, INC.
Filing Date: 2025-12-31
Form: 424B3
Chunk 277
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 D. Starr (16)                            |     |                                                 |    51,334 |     |        |     | * |     |                      |     44,444 |     |        |     |                                              |   6,891 |     |   |     |   |     | * |
| Thomas K. Schoenfeld (17)                     |     |                                                 |    42,668 |     |        |     | * |     |                      |     33,334 |     |        |     |                                              |   9,334 |     |   |     |   |     | * |

__________________

* Less than one percent.

(1) The business address for this person is 1731 Embarcadero Road, Suite 200, Palo Alto, California 94303. The securities being offered for sale in the Offering include 261,643 shares of Common Stock underlying the Ten Year Warrants that are exercisable as of the date of this prospectus.

(2) The business address for this person is 27 Yoav Street, Tel Aviv, Israel. The securities being offered for sale in the Offering include 68,447 shares of Common Stock underlying the Recanati Warrants that are exercisable as of the date of this prospectus.

(3) Solely consists of Pre-Funded Warrants and Subscription Warrants. The amounts beneficially owned prior to the Offering is the maximum that can be exercised as of December 26, 2025 as Sio Capital Management, LLC ("

#### Sio Management
") has elected to not have the right to exercise such warrants to the extent that after giving effect to such exercise, it would beneficially own in excess of 9.9% of the shares of Common Stock issued and outstanding immediately after giving effect to such exercise. Sio Management is the investment manager of Sio Partners LP (“

#### Sio Partners
”), Sio Partners Offshore Ltd. (“

#### Offshore
”), Compass SAV II LLC (“

#### Compass
”), and Compass Offshore SAV II PCC Limited (“

#### Compass Offshore
”), and Michael Castor is the sole owner and Managing Member of Sio Management. Sio Management and Mr. Castor may be deemed to beneficially own the securities held by Partners, Offshore, Compass, and Compass Offshore. Sio GP LLC is the General Partner of Sio Partners. Each of Sio Capital Management LLC, Sio GP LLC, and Michael Castor