X0508 4 2025-08-11 0001844505 QT IMAGING HOLDINGS, INC. QTIH 0001430575 Dinu Raluca C/O QT IMAGING HOLDINGS, INC. 3 HAMILTON LANDING SUITE 160 NOVATO CA 94949 1 1 0 0 Chief Executive Officer 0 Stock Option (right to buy) 1.90 2025-08-11 4 A 0 25000 0 A 2035-08-11 Common Stock 25000 25000 D One-third of the grant will vest on August 15, 2026, and the remaining two-thirds will vest in eight equal quarterly installments on each subsequent November 15, February 15, May 15, and August 15, such that the grant will be fully vested on August 15, 2028, subject to continued service with the Issuer through each vesting date. /s/ Dr. Raluca Dinu 2025-08-13