Heartflow (HTFL) director exercises stock options to acquire 8,667 shares

Rhea-AI Filing Summary

Heartflow, Inc. director Timothy C. Barabe exercised stock options and acquired 8,667 shares of common stock on March 11, 2026 at $2.22 per share. Following the transaction, he directly owns 179,521 common shares. The option grant continues to vest in monthly installments through July 1, 2027, subject to his continued service.

SEC Form 4

FORM 4

UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934
or Section 30(h) of the Investment Company Act of 1940

OMB APPROVAL

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Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

Check this box to indicate that a transaction was made pursuant to a contract, instruction or written plan for the purchase or sale of equity securities of the issuer that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c). See Instruction 10.

1. Name and Address of Reporting Person^*

BARABE TIMOTHY C

(Last) (First) (Middle)

C/O HEARTFLOW, INC.

331 E. EVELYN AVENUE

(Street)

MOUNTAIN VIEW CA 94041

(City) (State) (Zip)

2. Issuer Name and Ticker or Trading Symbol
Heartflow, Inc. [ HTFL ]

5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)

X	Director		10% Owner
	Officer (give title below)		Other (specify below)

3. Date of Earliest Transaction (Month/Day/Year)
03/11/2026

4. If Amendment, Date of Original Filed (Month/Day/Year)

6. Individual or Joint/Group Filing (Check Applicable Line)

X	Form filed by One Reporting Person
	Form filed by More than One Reporting Person

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1. Title of Security (Instr. 3)	2. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	3. Transaction Code (Instr. 8)		4. Securities Acquired (A) or Disposed Of (D) (Instr. 3, 4 and 5)			5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4)	6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	7. Nature of Indirect Beneficial Ownership (Instr. 4)
			Code	V	Amount	(A) or (D)	Price
Common Stock	03/11/2026		M		8,667	A	$2.22	179,521	D

Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 3)	2. Conversion or Exercise Price of Derivative Security	3. Transaction Date (Month/Day/Year)	3A. Deemed Execution Date, if any (Month/Day/Year)	4. Transaction Code (Instr. 8)		5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5)		6. Date Exercisable and Expiration Date (Month/Day/Year)		7. Title and Amount of Securities Underlying Derivative Security (Instr. 3 and 4)		8. Price of Derivative Security (Instr. 5)	9. Number of derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4)	10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)
				Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares
Stock Option	$2.22	03/11/2026		M			8,667	(1)	07/10/2033	Common Stock	8,667	$0	15,412	D

Explanation of Responses:

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

	/s/ Nga Van, by power of attorney	03/12/2026
	** Signature of Reporting Person	Date
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
* If the form is filed by more than one reporting person, see Instruction 4 (b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.

FAQ

What insider transaction did Heartflow (HTFL) report for Timothy C. Barabe?

Heartflow reported that director Timothy C. Barabe exercised stock options to acquire 8,667 shares of common stock on March 11, 2026. This was recorded as a derivative exercise, not an open-market purchase or sale, and increased his directly held share count.

At what price were the Heartflow (HTFL) options exercised in this Form 4?

The options were exercised at $2.22 per share into 8,667 shares of Heartflow common stock. This reflects the fixed exercise price of the stock option grant, rather than the market price on the transaction date.

How many Heartflow (HTFL) shares does Timothy C. Barabe hold after the transaction?

After exercising options for 8,667 shares, Timothy C. Barabe directly holds 179,521 shares of Heartflow common stock. This total reflects his direct ownership position immediately following the March 11, 2026 transaction reported in the Form 4.

Was the Heartflow (HTFL) Form 4 a buy or sell transaction?

The Form 4 reflects an acquisition through option exercise, not a market buy or sale. The transaction code "M" indicates exercise or conversion of a derivative security, with no reported open-market purchase or disposition of shares.

How do Timothy C. Barabe’s Heartflow (HTFL) options vest after this Form 4?

The option continues to vest in monthly installments until July 1, 2027, subject to his continued service. This means additional portions of the grant become exercisable each month through that date, according to the original vesting schedule.