X0609 4 2026-11-06 0001464521 Heartflow, Inc. HTFL 0002079946 Verghese Vikram false C/O HEARTFLOW, INC. 135 MAIN STREET, SUITE 1000 SAN FRANCISCO CA 94105 1 Chief Financial Officer 1 Common Stock. 2026-11-06 4 F 0 2009 52.40 D 153174 D Common Stock. 2026-11-09 4 S 0 3587 53.15 D 149587 D Represents shares that have been retained by the Issuer to satisfy income tax withholding and remittance obligations in connection with the vesting and net settlement of restricted stock units previously reported. The transaction reported in this Form 4 was effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on June 4, 2026. /s/ Nga Van, by power of attorney 2026-11-10