X0609 4 2026-03-20 0001844505 QT IMAGING HOLDINGS, INC. QTI 0002013346 Taylor Ross false C/O QT IMAGING HOLDINGS, INC. 3 HAMILTON LANDING SUITE 160 NOVATO CA 94949 1 0 0 0 0 Common Stock 57078 D Common Stock 2026-03-20 4 A 0 3500 0.00 A 60578 D The number of shares beneficially owned reflects the 3-for-1 reverse stock split effected October 23, 2025. Subject to the Reporting Person's continued service to QT Imaging Holdings, Inc. (the "Company"), twenty-five percent of the Restricted Stock Unit ("RSU") will vest on each of May 15, 2026, August 15, 2026, November 15, 2026, and February 15, 2027; all RSUs shall immediately vest in the event of a Change of Control (as defined in the QT Imaging Holdings, Inc. 2024 Equity Incentive Plan) of the Company. /s/ Ross Taylor 2026-03-24