X0508 4 2025-04-21 0001844505 QT IMAGING HOLDINGS, INC. QTIH 0002013354 Budagov Anastas C/O QT IMAGING HOLDINGS, INC. 3 HAMILTON LANDING, SUITE 160 NOVATO CA 94949 0 1 0 0 Chief Financial Officer 0 Employee Stock Option (right to buy) .665 2025-04-21 4 A 0 50000 0 A 2035-04-21 Common Stock 50000 50000 D One-third of the grant will vest on February 15, 2026, and the remaining two thirds will vest in eight equal quarterly installments on each subsequent May 15, August 15, November 15 and February 15, such that the grant will be fully vested on February 15, 2028, subject to continued service with the Issuer through each vesting date. /s/ Anastas Budagov 2025-04-23