X0609 4 2026-03-06 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 0 Common Stock. 2026-03-06 5 A 0 E 671 16.15 A 213534 D Common Stock. 2026-08-06 4 F 0 1537 27.19 D 255032 D Common Stock. 2026-08-07 4 F 0 473 28.82 D 254559 D These shares were acquired under the Issuer's Employee Stock Purchase Plan in a transaction exempt under Rule 16b-3(c).? The share balance reflects the Reporting Person's total current holdings immediately following the reported transaction. 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. /s/ Nga Van, by power of attorney 2026-08-10