HTFL · Heartflow, Inc.

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.

This transaction was executed in multiple trades at price ranging from $48.22 to $50.80. The price reported above reflects the weighted average sale price. The Reporting Person hereby undertakes to provide upon request to the SEC staff, the issuer or a security holder of the issuer full information regarding the number of shares and prices at which the transaction was effected.

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.

The transaction reported in this Form 4 was effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on September 12, 2025.

The transaction reported in this Form 4 was effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on September 12, 2025.

The option exercise and sale reported on this Form 4 were effected pursuant to a Rule 10b5-1 Trading Plan adopted by the reporting person on December 12, 2025.

The option exercise and sale reported on this Form 4 were effected pursuant to a Rule 10b5-1 Trading Plan adopted by the reporting person on December 12, 2025.

The option exercise and sale reported on this Form 4 were effected pursuant to a Rule 10b5-1 Trading Plan adopted by the reporting person on December 12, 2025.

The option vests and becomes exercisable in monthly installments until August 7, 2029, subject to continued service through the applicable vesting date.

The transaction reported in this Form 4 was effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on September 12, 2025.

The transaction reported in this Form 4 was effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on September 12, 2025.

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.

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.

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.

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.

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.

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.

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.

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 option vests and becomes exercisable in monthly installments until November 12, 2028, subject to continued service through the applicable vesting date.

The option vests and becomes exercisable in monthly installments until July 1, 2027, subject to continued service through the applicable vesting date.

These stock options are fully exercisable.

The option vests and becomes exercisable in monthly installments until October 30, 2027, subject to continued service through the applicable vesting date.

These stock options are fully exercisable.

These stock options are fully exercisable.

The option vests and becomes exercisable in monthly installments until October 30, 2027, subject to continued service through the applicable vesting date.

These stock options are fully exercisable.

The option exercise and sale reported on this Form 4 were effected pursuant to a Rule 10b5-1 Trading Plan adopted by the reporting person on December 12, 2025.

The option vests and becomes exercisable in monthly installments until August 7, 2029, subject to continued service through the applicable vesting date.

The option exercise and sale reported on this Form 4 were effected pursuant to a Rule 10b5-1 Trading Plan adopted by the reporting person on December 12, 2025.

The option exercise and sale reported on this Form 4 were effected pursuant to a Rule 10b5-1 Trading Plan adopted by the reporting person on December 12, 2025.

The transaction reported in this Form 4 was effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on September 12, 2025.

These stock options are fully exercisable.

These stock options are fully exercisable.

These stock options are fully exercisable.

The transaction reported in this Form 4 was effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on September 12, 2025.

The option will vest in full on the earlier of the day prior to Heartflow's annual meeting of shareholders in 2027 and the first anniversary of the grant date, subject to continued service through such date.

The option will vest in full on the earlier of the day prior to Heartflow's annual meeting of shareholders in 2027 and the first anniversary of the grant date, subject to continued service through such date.

The option will vest in full on the earlier of the day prior to Heartflow's annual meeting of shareholders in 2027 and the first anniversary of the grant date, subject to continued service through such date.

The option will vest in full on the earlier of the day prior to Heartflow's annual meeting of shareholders in 2027 and the first anniversary of the grant date, subject to continued service through such date.

The option will vest in full on the earlier of the day prior to Heartflow's annual meeting of shareholders in 2027 and the first anniversary of the grant date, subject to continued service through such date.

The option will vest in full on the earlier of the day prior to Heartflow, Inc.'s annual meeting of shareholders in 2027 and the first anniversary of the grant date, subject to continued service through such date.