<SEC-DOCUMENT>0001628280-25-039730.txt : 20250811
<SEC-HEADER>0001628280-25-039730.hdr.sgml : 20250811
<ACCEPTANCE-DATETIME>20250811210045
ACCESSION NUMBER:		0001628280-25-039730
CONFORMED SUBMISSION TYPE:	4
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20250807
FILED AS OF DATE:		20250811
DATE AS OF CHANGE:		20250811

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			Tansey Casey M
		CENTRAL INDEX KEY:			0001474322
		ORGANIZATION NAME:           	

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-42790
		FILM NUMBER:		251203690

	MAIL ADDRESS:	
		STREET 1:		1460 EL CAMINO REAL STE 100
		CITY:			MENLO PARK
		STATE:			CA
		ZIP:			94025

ISSUER:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			Heartflow, Inc.
		CENTRAL INDEX KEY:			0001464521
		STANDARD INDUSTRIAL CLASSIFICATION:	SURGICAL & MEDICAL INSTRUMENTS & APPARATUS [3841]
		ORGANIZATION NAME:           	08 Industrial Applications and Services
		EIN:				260506743
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			0811

	BUSINESS ADDRESS:	
		STREET 1:		331 E EVELYN AVENUE
		CITY:			MOUNTAIN VIEW
		STATE:			CA
		ZIP:			94041
		BUSINESS PHONE:		650-241-1221

	MAIL ADDRESS:	
		STREET 1:		331 E EVELYN AVENUE
		CITY:			MOUNTAIN VIEW
		STATE:			CA
		ZIP:			94041

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	Cardiovascular Simulation, Inc.
		DATE OF NAME CHANGE:	20090519
</SEC-HEADER>
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                    <footnoteId id="F5"/>
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                <value>Stock Option</value>
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                </transactionAcquiredDisposedCode>
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                <value>2035-08-07</value>
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    <footnotes>
        <footnote id="F1">Each share of Series B-1 preferred stock and Series B-2 preferred stock automatically converted into approximately 0.4031 shares of Heartflow, Inc.'s (&quot;Heartflow&quot;) common stock immediately prior to the closing of Heartflow's initial public offering. These shares are reported in Table II above on an as-converted basis.</footnote>
        <footnote id="F2">Each share of Series C preferred stock automatically converted into approximately 0.5764 shares of Heartflow's common stock immediately prior to the closing of Heartflow's initial public offering. These shares are reported in Table II above on an as-converted basis.</footnote>
        <footnote id="F3">Each share of Series D preferred stock automatically converted into approximately 0.6467 shares of Heartflow's common stock immediately prior to the closing of Heartflow's initial public offering. These shares are reported in Table II above on an as-converted basis.</footnote>
        <footnote id="F4">Each share of Series F preferred stock automatically converted into approximately 0.3425 shares of Heartflow's common stock immediately prior to the closing of Heartflow's initial public offering. These shares are reported in Table II above on an as-converted basis.</footnote>
        <footnote id="F5">Upon the closing of Heartflow's initial public offering, the convertible promissory notes automatically converted into shares of Heartflow's common stock at a conversion price of 80% of the price per share in Heartflow's initial public offering, subject to a valuation ceiling of $2.0 billion. The shares of common stock that were issuable upon conversion of the convertible promissory note had no expiration date. These shares are reported in Table II above on an as-converted basis.</footnote>
        <footnote id="F6">Presidio Management Group X, L.L.C. (&quot;PMG X&quot;) is the general partner of U.S. Venture Partners X, L.P. and USVP X Affiliates, L.P. The Reporting Person, Steven M. Krausz, Richard W. Lewis, Jonathan D. Root and Irwin Federman are the managing members of PMG X, and share voting and dispositive power with respect to the shares held by U.S. Venture Partners X, L.P. and USVP X Affiliates, L.P. Each of the managing members of PMG X disclaims beneficial ownership of such holdings, except to the extent of their pecuniary interest in the shares, and the inclusion of these shares in this report shall not be deemed an admission of beneficial ownership of all of the reported shares for purposes of Section 16 or for any other purpose.</footnote>
        <footnote id="F7">The option will vest in full on the earlier of Heartflow's annual meeting of shareholders in 2026 and the first anniversary of the grant date, subject to continued service through such date.</footnote>
    </footnotes>

    <remarks></remarks>

    <ownerSignature>
        <signatureName>/s/ Angela Ahmad, Attorney-in-Fact for Casey M. Tansey</signatureName>
        <signatureDate>2025-08-11</signatureDate>
    </ownerSignature>
</ownershipDocument>
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