Company: QTIWW
Filing Date: 2025-12-31
Form Type: 424B3
Source: 0001628280-25-059235
Chunk: 132

Company: QT IMAGING HOLDINGS, INC.
Filing Date: 2025-12-31
Form: 424B3
Chunk 132
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 Third Omnibus Amendment (the “

#### Third Amendment
”), pursuant to which, we and Yorkville agreed that for $1.5 million of the then current outstanding balance due under the $10.0 million Yorkville Note (principal and unpaid accrued interest), the Fixed Price for conversion shall be modified to $1.752 per share, and for the remainder of the balance, the Fixed Price shall not be changed but shall remain $13.84185 per share as provided for in the Yorkville Note when we issued it on March 4, 2024. Further, the Third Amendment removed our obligation to make monthly payments to Yorkville, previously owing due to the occurrence of the Trigger Event (as defined in the Third Amendment), such that no further monthly payments will be owed during the period beginning on the date of the Third Amendment and ending on the maturity date of the Yorkville Note of March 31, 2026. In exchange for this relief, the aggregate purchase price owed to us from the first Advance (the “

#### Advanced Proceeds
”) that occurs pursuant to the terms of the SEPA shall be paid by Yorkville offsetting the amount of the Advance Proceeds against an equal amount outstanding under the Yorkville Note (first towards accrued and unpaid interest, and then towards outstanding principal and the corresponding payment

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premium in respect of such principal amount, if applicable), and that for any subsequent Advances pursuant to the terms of the SEPA, Yorkville shall pay half of such Advance Proceeds directly to us and the other half of such Advance Proceeds shall be paid by Yorkville offsetting the amount of the Advance Proceeds against an equal amount outstanding under the Yorkville Note (first towards accrued and unpaid interest, and then towards outstanding principal and the corresponding payment premium in respect of such principal amount, if applicable). On January 9, 2025, we delivered our first Advance Notice under the SEPA for the sale of 295,000 shares of Common Stock. This resulted in the reduction of an additional $182,682 in principal of the Yorkville Note.

On January 9, 2025, we also entered into an amendment (the “

#### Cable Car Amendment
”) with Funicular Funds, LP (“Cable Car”) to amend certain terms of the secured note purchase agreement with Cable Car (the “Cable Car Note”), including a reduction of the conversion price for the Cable Car Note to $1.752 per share. Further, the