Company: QTIWW
Filing Date: 2025-11-03
Form Type: S-1
Source: 0001628280-25-048373
Chunk: 274

Company: QT IMAGING HOLDINGS, INC.
Filing Date: 2025-11-03
Form: S-1
Chunk 274
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 date on which the information in the table is presented.

Selling Securityholders information for each additional Selling Securityholders, if any, will be set forth by prospectus supplement to the extent required prior to the time of any offer or sale of such Selling Securityholders’ shares pursuant to this prospectus. Any prospectus supplement may add, update, substitute, or change the information contained in this prospectus, including the identity of the Selling Securityholders and the number of shares registered on its behalf. The Selling Securityholders may sell or otherwise transfer all, some or none of such

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shares in this offering. See the section entitled “Plan of Distribution” for further information regarding the Selling Securityholders’s method of distributing these shares.

|                                       |     | Shares Beneficially Owned Prior to the Offering |           |     |   |     |   |     | Shares Being Offered |            |     |        |     | Shares Beneficially Owned After the Offering |         |     |   |     |     |   |
| Name of Selling Stockholder           |     | Shares                                          |           |     | % |     |   |     |                      |            |     | Shares |     |                                              |         |     | % |     |     |   |
| Dr. Avi S. Katz                       |     |                                                 |   907,323 |     |   | 7.3 | % |     |                      |    392,465 |     |        |     |                                              | 514,858 |     |   |     | 4.2 | % |
| Dr. Raluca Dinu                       |     |                                                 | 1,014,266 |     |   | 8.1 | % |     |                      |    392,465 |     |        |     |                                              | 621,801 |     |   |     | 5.1 | % |
| Leon Recanati                         |     |                                                 |   136,894 |     |   | 1.1 | % |     |                      |    136,894 |     |        |     |                                              |       — |     |   |     |   — |   |
| Sio Partners LP                       |     |                                                 |   612,832 |     |   | 4.9 | % |     |                      |  1,084,676 |     |        |     |                                              |       — |     |