Heartflow (NASDAQ: HTFL) insider plans 32,676-share Rule 144 sale

Rhea-AI Filing Summary

Heartflow, Inc. (HTFL) is the issuer for a planned resale of its common stock by stockholder John C.M. Farquhar under Rule 144. The notice lists 32,676 shares of common stock, associated with a stock option exercise on 06/24/2024, to be sold through Fidelity Brokerage Services LLC on NASDAQ.

The filing also discloses prior sales of Heartflow common stock by the same holder during the past three months, including transactions of 22,562, 38,900, 22,562, 22,562, and 15,560 shares on various dates in June, July, and August 2026, with corresponding dollar amounts reported as sale values.

Key Figures

Shares listed for planned Rule 144 sale: 32,676 shares Reported value for 06/10/2026 sale: 643,017.00 Shares sold on 06/24/2026: 38,900 shares +5 more

8 metrics

Shares listed for planned Rule 144 sale 32,676 shares Common stock associated with a stock option exercise dated 06/24/2024

Reported value for 06/10/2026 sale 643,017.00 Common stock sale of 22,562 shares on 06/10/2026

Shares sold on 06/24/2026 38,900 shares Common stock sale by John C.M. Farquhar on 06/24/2026

Reported value for 06/24/2026 sale 1,361,500.00 Common stock sale of 38,900 shares on 06/24/2026

Shares sold on 07/10/2026 22,562 shares Common stock sale by John C.M. Farquhar on 07/10/2026

Reported value for 07/10/2026 sale 626,095.50 Common stock sale of 22,562 shares on 07/10/2026

Shares sold on 08/14/2026 15,560 shares Common stock sale by John C.M. Farquhar on 08/14/2026

Reported value for 08/14/2026 sale 607,773.60 Common stock sale of 15,560 shares on 08/14/2026

Key Terms

Rule 144, Stock Option Exercise, attorney-in-fact, aggregate

4 terms

Rule 144 regulatory

"See the definition of "person" in paragraph (a) of Rule 144."

Rule 144 is a U.S. securities regulation that sets conditions under which restricted or insider-held shares can be legally resold to the public, such as required holding periods, availability of public information, limits on how much can be sold at once, and certain filing requirements. For investors it matters because it determines when previously locked-up shares can enter the market — like a release valve that can increase supply, affect share price, and signal insider intent.

Stock Option Exercise financial

"Common | 06/24/2024 | Stock Option Exercise | Issuer"

A stock option exercise is the act of using a previously granted right to buy shares of a company's stock at a specific, predetermined price by paying that price and receiving the shares. It matters to investors because exercising changes who owns the shares (which can dilute existing ownership), can trigger taxable events and shift potential gains or losses, and affects voting power and the company’s outstanding share count—like turning a voucher into an actual product that becomes part of circulating supply.

attorney-in-fact regulatory

"as attorney-in-fact for John C.M. Farquhar"

An attorney-in-fact is the person or entity given legal authority through a power of attorney to act on behalf of another for specific tasks, such as signing documents, voting shares, or handling transactions. For investors, this matters because it lets a trusted representative make timely decisions or complete paperwork when the owner cannot, much like handing keys to someone to run errands on your behalf—so checks on scope and limits of that authority are important.

aggregate financial

"Information shall be given as to sales by all persons whose sales are required ... to be aggregated"

A combined total or summary created by adding together multiple parts or data points. Used as a noun and a verb, it means pooling individual items (sales, revenues, assets, transactions, or data) into one overall figure so stakeholders can see the big picture; like pouring many small jars into a single container to measure the total amount. Aggregate figures matter to investors because they show the overall size, trend, or exposure of a business or market rather than the detail of each component.

FAQ

What does this Form 144 filing mean for Heartflow, Inc. (HTFL)?

The filing reports a planned resale of Heartflow common stock by an existing holder, John C.M. Farquhar, under Rule 144. It reflects that shares may be sold into the market, but does not involve Heartflow issuing new shares or receiving proceeds.

How many Heartflow (HTFL) shares are proposed to be sold under this Form 144?

The notice lists 32,676 shares of Heartflow common stock in connection with a planned Rule 144 sale. These shares are tied to a stock option exercise dated 06/24/2024 and are to be sold through Fidelity Brokerage Services LLC.

What prior Heartflow (HTFL) stock sales by John C.M. Farquhar are disclosed?

The filing lists five prior common stock sales: 22,562 shares on 06/10/2026, 38,900 on 06/24/2026, 22,562 on 07/10/2026, 22,562 on 08/10/2026, and 15,560 on 08/14/2026, each with corresponding dollar amounts reported.

Does Heartflow (HTFL) receive any proceeds from the transactions in this Form 144?

The Form 144 describes resales of common stock by an existing stockholder through a broker. The information provided relates to the stockholder’s sales and related values, not to Heartflow receiving offering proceeds.

On which market are the Heartflow (HTFL) shares in this Form 144 expected to trade?

The securities information section identifies the trading market as NASDAQ. The shares referenced in the Form 144 relate to Heartflow’s common stock to be sold through Fidelity Brokerage Services LLC on that market.

Who is executing the Form 144 on behalf of the Heartflow (HTFL) stockholder?

The signature block shows the filing executed by /s/ Daniel Tucci as a duly authorized representative of Fidelity Brokerage Services LLC, acting as attorney-in-fact for stockholder John C.M. Farquhar.

AI-generated analysis. How Rhea-AI works. Not financial advice.

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Available on EDGAR 08/18/2026 - 05:11 PM Accepted by SEC EDGAR 08/18/2026 - 05:11 PM Learn about SEC filing dates

Form 144 Filer Information	UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 144 NOTICE OF PROPOSED SALE OF SECURITIES PURSUANT TO RULE 144 UNDER THE SECURITIES ACT OF 1933
FORM 144

144: Filer Information

Filer CIK	0001900415
Filer CCC	XXXXXXXX
Is this a LIVE or TEST Filing?	LIVE TEST
Submission Contact Information
Name
Phone
E-Mail Address

144: Issuer Information

Name of Issuer	Heartflow, Inc.
SEC File Number	001-42790
Address of Issuer	135 MAIN STREET, SUITE 1000 SAN FRANCISCO CALIFORNIA 94105
Phone	650-241-1221
Name of Person for Whose Account the Securities are To Be Sold	Farquhar John C.M.
See the definition of "person" in paragraph (a) of Rule 144. Information is to be given not only as to the person for whose account the securities are to be sold but also as to all other persons included in that definition. In addition, information shall be given as to sales by all persons whose sales are required by paragraph (e) of Rule 144 to be aggregated with sales for the account of the person filing this notice.
Relationship to Issuer	Officer
Relationship to Issuer	Director

144: Securities Information

Title of the Class of Securities To Be Sold	Name and Address of the Broker	Number of Shares or Other Units To Be Sold	Aggregate Market Value	Number of Shares or Other Units Outstanding	Approximate Date of Sale	Name the Securities Exchange
Common	Fidelity Brokerage Services LLC 900 Salem Street Smithfield RI 02917	32676	1470420.00	86953627	08/18/2026	NASDAQ

Furnish the following information with respect to the acquisition of the securities to be sold and with respect to the payment of all or any part of the purchase price or other consideration therefor:

144: Securities To Be Sold

Title of the Class	Date you Acquired	Nature of Acquisition Transaction	Name of Person from Whom Acquired	Is this a Gift?	Date Donor Acquired	Amount of Securities Acquired	Date of Payment	Nature of Payment *
Common	06/24/2024	Stock Option Exercise	Issuer			32676	06/24/2024	Cash

* If the securities were purchased and full payment therefor was not made in cash at the time of purchase, explain in the table or in a note thereto the nature of the consideration given. If the consideration consisted of any note or other obligation, or if payment was made in installments describe the arrangement and state when the note or other obligation was discharged in full or the last installment paid.

Furnish the following information as to all securities of the issuer sold during the past 3 months by the person for whose account the securities are to be sold.

144: Securities Sold During The Past 3 Months

Name and Address of Seller	Title of Securities Sold	Date of Sale	Amount of Securities Sold	Gross Proceeds
John C M Farquhar 135 Main Street Suite 1000 San Francisco CA 94105	Common	06/10/2026	22562	643017.00
John C M Farquhar 135 Main Street Suite 1000 San Francisco CA 94105	Common	06/24/2026	38900	1361500.00
John C M Farquhar 135 Main Street Suite 1000 San Francisco CA 94105	Common	07/10/2026	22562	626095.50
John C M Farquhar 135 Main Street, Suite 1000 San Francisco CA 94105	Common	08/10/2026	22562	638730.22
John C M Farquhar 135 Main Street, Suite 1000 San Francisco CA 94105	Common	08/14/2026	15560	607773.60

144: Remarks and Signature

Remarks
Date of Notice	08/18/2026
Date of Plan Adoption or Giving of Instruction, If Relying on Rule 10b5-1	09/12/2025
ATTENTION:
The person for whose account the securities to which this notice relates are to be sold hereby represents by signing this notice that he does not know any material adverse information in regard to the current and prospective operations of the Issuer of the securities to be sold which has not been publicly disclosed. If such person has adopted a written trading plan or given trading instructions to satisfy Rule 10b5-1 under the Exchange Act, by signing the form and indicating the date that the plan was adopted or the instruction given, that person makes such representation as of the plan adoption or instruction date.
Signature	/s/ Daniel Tucci, as a duly authorized representative of Fidelity Brokerage Services LLC, as attorney-in-fact for John C.M. Farquhar
ATTENTION: Intentional misstatements or omission of facts constitute Federal Criminal Violations (See 18 U.S.C. 1001)