Company: QTIWW
Filing Date: 2025-12-31
Form Type: 424B3
Source: 0001628280-25-059235
Chunk: 401

Company: QT IMAGING HOLDINGS, INC.
Filing Date: 2025-12-31
Form: 424B3
Chunk 401
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The following securities were excluded from the calculation of net loss per share because the inclusion would be anti-dilutive as of September 30, 2025 and 2024:

|                                            |     | September 30, 2025 |     |            |     | September 30, 2024 |     |            |
|:-------------------------------------------|:----|:-------------------|:----|-----------:|:----|:-------------------|:----|-----------:|
| Common stock warrants(1)                   |     |                    |     | 30,269,843 |     |                    |     |  7,963,212 |
| Potential shares from Pre-Paid Advance(1)  |     |                    |     |          — |     |                    |     |  3,375,660 |
| Merger consideration earnout shares(1)     |     |                    |     |  2,000,000 |     |                    |     |  3,000,000 |
| Potential shares from Cable Car Note(1)    |     |                    |     |          — |     |                    |     |    250,000 |
| Potential shares from convertible notes(1) |     |                    |     |     88,402 |     |                    |     |     83,408 |
| Options outstanding(1)                     |     |                    |     |  1,249,311 |     |                    |     |    690,645 |
|                                            |     |                    |     | 33,607,556 |     |                    |     | 15,362,925 |

__________________

(1) Share amounts as of September 30, 2024 differ from those published in prior condensed consolidated financial statements as they were retrospectively adjusted as a result of the Reverse Stock Split (as described below in Note 1, The Company and Summary of Significant Accounting Policies). Specifically, the number of shares of common stock outstanding during periods before the Reverse Stock Split are divided by the exchange ratio of 3:1, such that each three shares of common stock were combined and reconstituted into one share of common stock effective October 23, 2025.

#### Summary of Significant Accounting Policies
Other than the policies discussed above, there have been no changes to the Company’s significant accounting policies described in its Annual Report on Form 10-K for the year ended December 31, 2024 that have had a material impact on