X0508 4 2021-09-23 0001844505 QT IMAGING HOLDINGS, INC. QTI 0001451693 Katz Avi S C/O GIGCAPITAL GROUP 1731 EMBARCADERO ROAD, SUITE 200 PALO ALTO CA 94303 1 1 1 0 Chairman 0001844511 GigAcquisitions5, LLC 1731 EMBARCADERO RD., SUITE 200 PALO ALTO CA 94303 0 0 1 0 0 Common Stock 2021-09-23 4 A 0 795000 10.00 A 6530000 I By GigAcquisitions5, LLC Common Stock 2024-03-04 4 M 0 94364 10.00 A 6624364 I By GigAcquisitions5, LLC Private Warrants 11.50 2021-09-23 4 A 0 795000 10.00 A Common Stock 795000 795000 I By GigAcquisitions5, LLC Private Warrants 11.50 2024-03-04 4 M 0 94364 10.00 A Common Stock 94364 94364 I By GigAcquisitions5, LLC $10.00 is the price per Private Unit, with each Private Unit consisting of (i) one share of Common Stock, and (ii) one Private Warrant exercisable at price of $11.50 per share of Common Stock. Includes 5,735,000 founder shares of Common Stock previously reported in the Form 3 filed by the Reporting Persons on September 23, 2021. The Common Stock and Private Warrants are held directly by GigAcquisitions5, LLC (the "Sponsor"). The Common Stock and Private Warrants held by the Sponsor are beneficially owned by Dr. Avi S. Katz, GigCapital5, Inc.'s Executive Chairman of the Board of Directors. Dr. Katz is also the Manager of the Sponsor, who has sole voting and dispositive power over the shares held by the Sponsor. The Private Warrants will become exercisable on the later of 30 days after the completion of the Company's initial business combination or 12 months from the completion of the Company's initial public offering. The Private Warrants will expire on the fifth anniversary of the Company's completion of its initial business combination. Upon the Closing of the Company's initial business combination, Sponsor elected to partially convert $943,640 in principal balance outstanding under the convertible Working Capital Note into 94,364 shares of Common Stock and 94,364 warrants. /s/ Dr. Avi S. Katz 2024-03-06 /s/ Dr. Avi S. Katz, Managing Member 2024-03-06