X0202 SCHEDULE 13G/A 0001666853 XXXXXXXX LIVE 1 Class A Common Stock, $0.001 par value 02/06/2026 0001464521 HEARTFLOW, INC. 42238D107 331 E. Evelyn Avenue Mountain View CA 94041 Rule 13d-1(d) Hayfin Management Holdings Limited a E9 0 633505.00 0 633505.00 633505.00 N 0.7 FI Row 6, Row 8 and Row 9 reflect the disposition, during the three months ended March 31, 2026, of 4,648,410 shares of Class A Common Stock indirectly held on behalf of the Reporting Person. The percentage ownership reported in Row 11 was calculated based upon an aggregate of 85,757,754 shares of Class A Common Stock outstanding as of February 28, 2026 as reported in Heartflow, Inc.'s Annual Report on Form 10-K for the fiscal year ended December 31, 2025 filed with the Securities and Exchange Commission on March 18, 2026. Hayfin Heartflow UK Limited a X0 0 530610 0 530610 530610 N 0.6 FI Rows 6, 8 and 9 reflect the disposition, during the three months ended March 31, 2026, of 3,104,987 shares of Class A Common Stock held by the Reporting Person. The percentage ownership reported in Row 11 was calculated based upon an aggregate of 85,757,754 shares of Class A Common Stock outstanding as of February 28, 2026 as reported in Heartflow, Inc.'s Annual Report on Form 10-K for the fiscal year ended December 31, 2025 filed with the Securities and Exchange Commission on March 18, 2026. Hayfin Tourmaline LuxCo S.a.r.l. a N4 0 102895.00 0 102895.00 102895.00 N 0.1 FI Row 6, Row 8 and Row 9 reflect the disposition, during the three months ended March 31, 2026, of 1,543,422 shares of Class A Common Stock held by the Reporting Person. The percentage ownership reported in Row 11 was calculated based upon an aggregate of 85,757,754 shares of Class A Common Stock outstanding as of February 28, 2026 as reported in Heartflow, Inc.'s Annual Report on Form 10-K for the fiscal year ended December 31, 2025 filed with the Securities and Exchange Commission on March 18, 2026. Hayfin Healthcare Opportunities Fund GP S.a.r.l. a N4 0 633505.00 0 633505.00 633505.00 N 0.7 FI Row 6, Row 8 and Row 9 reflect the disposition, during the three months ended March 31, 2026, of 633,508 shares of Class A Common Stock indirectly held on behalf of the Reporting Person. The percentage ownership reported in Row 11 was calculated based upon an aggregate of 85,757,754 shares of Class A Common Stock outstanding as of February 28, 2026 as reported in Heartflow, Inc.'s Annual Report on Form 10-K for the fiscal year ended December 31, 2025 filed with the Securities and Exchange Commission on March 18, 2026. Hayfin Healthcare Opportunities Invest LP a DE 0 633505.00 0 633505.00 633505.00 N 0.7 FI Row 6, Row 8 and Row 9 reflect the disposition, during the three months ended March 31, 2026, of 633,508 shares of Class A Common Stock indirectly held on behalf of the Reporting Person. The percentage ownership reported in Row 11 was calculated based upon an aggregate of 85,757,754 shares of Class A Common Stock outstanding as of February 28, 2026 as reported in Heartflow, Inc.'s Annual Report on Form 10-K for the fiscal year ended December 31, 2025 filed with the Securities and Exchange Commission on March 18, 2026. Hayfin SOF III GP S.a.r.l. a N4 0 0.00 0 0.00 0.00 N 0.00 FI Row 6, Row 8 and Row 9 reflect the disposition, during the three months ended March 31, 2026, of 100.0% of the shares of Class A Common Stock indirectly held on behalf of the Reporting Person. Hayfin Special Opportunities Fund III SCSp a N4 0 0.00 0 0.00 0.00 N 0.00 FI Row 6, Row 8 and Row 9 reflect the disposition, during the three months ended March 31, 2026, of 100.0% of the shares of Class A Common Stock indirectly held on behalf of the Reporting Person. Hayfin Hostplus GP Limited a E9 0 0.00 0 0.00 0.00 N 0.00 FI Row 6, Row 8 and Row 9 reflect the disposition, during the three months ended March 31, 2026, of 100.0% of the shares of Class A Common Stock indirectly held on behalf of the Reporting Person. Hayfin Hostplus LP a X0 0 0.00 0 0.00 0.00 N 0.00 FI Row 6, Row 8 and Row 9 reflect the disposition, during the three months ended March 31, 2026, of 100.0% of the shares of Class A Common Stock indirectly held on behalf of the Reporting Person. Hayfin Chief GP Limited a E9 0 0.00 0 0.00 0.00 N 0.00 FI Row 6, Row 8 and Row 9 reflect the disposition, during the three months ended March 31, 2026, of 100.0% of the shares of Class A Common Stock indirectly held on behalf of the Reporting Person. Hayfin Chief LP a E9 0 0.00 0 0.00 0.00 N 0.00 FI Row 6, Row 8 and Row 9 reflect the disposition, during the three months ended March 31, 2026, of 100.0% of the shares of Class A Common Stock indirectly held on behalf of the Reporting Person. SunHay GP Limited a E9 0 0.00 0 0.00 0.00 N 0.00 FI Row 6, Row 8 and Row 9 reflect the disposition, during the three months ended March 31, 2026, of 100.0% of the shares of Class A Common Stock indirectly held on behalf of the Reporting Person. SunHay LP a X0 0 0.00 0 0.00 0.00 N 0.00 FI Row 6, Row 8 and Row 9 reflect the disposition, during the three months ended March 31, 2026, of 100.0% of the shares of Class A Common Stock indirectly held on behalf of the Reporting Person. Hayfin Big Cypress GP Limited a E9 0 0.00 0 0.00 0.00 N 0.00 FI Row 6, Row 8 and Row 9 reflect the disposition, during the three months ended March 31, 2026, of 100.0% of the shares of Class A Common Stock indirectly held on behalf of the Reporting Person. Hayfin Big Cypress LP a E9 0 0.00 0 0.00 0.00 N 0.00 FI Row 6, Row 8 and Row 9 reflect the disposition, during the three months ended March 31, 2026, of 100.0% of the shares of Class A Common Stock indirectly held on behalf of the Reporting Person. Hayfin Hamilton GP Limited a E9 0 0.00 0 0.00 0.00 N 0.00 FI Hayfin Hamilton LP a X0 0 0.00 0 0.00 0.00 N 0.00 FI Hayfin Opal 2020 GP Limited a E9 0 0.00 0 0.00 0.00 N 0.00 FI Row 6, Row 8 and Row 9 reflect the disposition, during the three months ended March 31, 2026, of 100.0% of the shares of Class A Common Stock indirectly held on behalf of the Reporting Person. Hayfin Opal 2020 (A) LP a X0 0 0.00 0 0.00 0.00 N 0.00 FI Row 6, Row 8 and Row 9 reflect the disposition, during the three months ended March 31, 2026, of 100.0% of the shares of Class A Common Stock indirectly held on behalf of the Reporting Person. Hayfin Opal 2020 (B) LP a X0 0 0.00 0 0.00 0.00 N 0.00 FI Row 6, Row 8 and Row 9 reflect the disposition, during the three months ended March 31, 2026, of 100.0% of the shares of Class A Common Stock indirectly held on behalf of the Reporting Person. Hayfin SOF II GP Limited a E9 0 0.00 0 0.00 0.00 N 0.00 FI Row 6, Row 8 and Row 9 reflect the disposition, during the three months ended March 31, 2026, of 100.0% of the shares of Class A Common Stock indirectly held on behalf of the Reporting Person. Hayfin Special Opportunities Fund II LP a E9 0 0.00 0 0.00 0.00 N 0.00 FI Row 6, Row 8 and Row 9 reflect the disposition, during the three months ended March 31, 2026, of 100.0% of the shares of Class A Common Stock indirectly held on behalf of the Reporting Person. Hayfin SOF III AIV GP S.a.r.l. a N4 0 0.00 0 0.00 0.00 N 0.00 FI Row 6, Row 8 and Row 9 reflect the disposition, during the three months ended March 31, 2026, of 100.0% of the shares of Class A Common Stock indirectly held on behalf of the Reporting Person. Hayfin AUS AIV LP - Hostplus Series a DE 0 0.00 0 0.00 0.00 N 0.00 FI Row 6, Row 8 and Row 9 reflect the disposition, during the three months ended March 31, 2026, of 100.0% of the shares of Class A Common Stock indirectly held on behalf of the Reporting Person. Hayfin Special Opportunities Fund III AIV LP a DE 0 0.00 0 0.00 0.00 N 0.00 FI Row 6, Row 8 and Row 9 reflect the disposition, during the three months ended March 31, 2026, of 100.0% of the shares of Class A Common Stock indirectly held on behalf of the Reporting Person. Hayfin AUS AIV LP - AUS SOF III Series a DE 0 0.00 0 0.00 0.00 N 0.00 FI Row 6, Row 8 and Row 9 reflect the disposition, during the three months ended March 31, 2026, of 100.0% of the shares of Class A Common Stock indirectly held on behalf of the Reporting Person. HEARTFLOW, INC. 331 E. Evelyn Avenue Mountain View, California 94041 Hayfin Management Holdings Limited Hayfin Heartflow UK Limited Hayfin Tourmaline LuxCo S.a.r.l. Hayfin Healthcare Opportunities Fund GP S.a.r.l. Hayfin Healthcare Opportunities Invest LP Hayfin SOF III GP S.a.r.l. Hayfin Special Opportunities Fund III SCSp Hayfin Hostplus GP Limited Hayfin Hostplus LP Hayfin Chief GP Limited Hayfin Chief LP SunHay GP Limited SunHay LP Hayfin Big Cypress GP Limited Hayfin Big Cypress LP Hayfin Hamilton GP Limited Hayfin Hamilton LP Hayfin Opal 2020 GP Limited Hayfin Opal 2020 (A) LP Hayfin Opal 2020 (B) LP Hayfin SOF II GP Limited Hayfin SOF II GP LP Hayfin Special Opportunities Fund II LP Hayfin SOF III AIV GP S.a.r.l. Hayfin AUS AIV LP - Hostplus Series Hayfin Special Opportunities Fund III AIV LP Hayfin AUS AIV LP AUS SOF III Series The principal business office of Hayfin Management Holdings Limited and each of its executive officers is: One Nexus Way Camana Bay George Town, Grand Cayman KY1-9005 Cayman Islands The principal business office of Hayfin Heartflow UK Limited and each of its executive officers is: 65 Davies Street London W1K 5JL England The principal business office of Hayfin Tourmaline LuxCo S.a.r.l. and each of its executive officers is: 15 Boulevard F.W. Raffeisen L-2411 Luxembourg The principal business office of Hayfin Healthcare Opportunities Fund GP S.a.r.l. and each of its executive officers is: 15 Boulevard F.W. Raffeisen L-2411 Luxembourg The principal business office of Hayfin Healthcare Opportunities Invest LP and each of its executive officers is: c/o The Corporation Trust Company Corporation Trust Center 1209 Orange Street Wilmington, Delaware 19801 The principal business office of Hayfin SOF III GP S.a.r.l. and each of its executive officers is: 15 Boulevard F.W. Raffeisen L-2411 Luxembourg The principal business office of Hayfin Special Opportunities Fund III SCSp and each of its executive officers is: 15 Boulevard F.W. Raffeisen L-2411 Luxembourg The principal business office of Hayfin Hostplus GP Limited and each of its executive officers is: One Nexus Way Camana Bay George Town, Grand Cayman KY1-9005 Cayman Islands The principal business office of Hayfin Hostplus LP and each of its executive officers is: One Nexus Way Camana Bay George Town, Grand Cayman KY1-9005 Cayman Islands The principal business office of Hayfin Chief GP Limited and each of its executive officers is: One Nexus Way Camana Bay George Town, Grand Cayman KY1-9005 Cayman Islands The principal business office of Hayfin Chief LP and each of its executive officers is: One Nexus Way Camana Bay George Town, Grand Cayman KY1-9005 Cayman Islands The principal business office of SunHay GP Limited and each of its executive officers is: One Nexus Way Camana Bay George Town, Grand Cayman KY1-9005 Cayman Islands The principal business office of SunHay LP and each of its executive officers is: One Nexus Way Camana Bay George Town, Grand Cayman KY1-9005 Cayman Islands The principal business office of Hayfin Big Cypress GP Limited and each of its executive officers is: One Nexus Way Camana Bay George Town, Grand Cayman KY1-9005 Cayman Islands The principal business office of Hayfin Big Cypress LP and each of its executive officers is: One Nexus Way Camana Bay George Town, Grand Cayman KY1-9005 Cayman Islands The principal business office of Hayfin Hamilton GP Limited and each of its executive officers is: One Nexus Way Camana Bay George Town, Grand Cayman KY1-9005 Cayman Islands The principal business office of Hayfin Hamilton LP and each of its executive officers is: One Nexus Way Camana Bay George Town, Grand Cayman KY1-9005 Cayman Islands The principal business office of Hayfin Opal 2020 GP Limited and each of its executive officers is: One Nexus Way Camana Bay George Town, Grand Cayman KY1-9005 Cayman Islands The principal business office of Hayfin Opal 2020 (A) LP and each of its executive officers is: One Nexus Way Camana Bay George Town, Grand Cayman KY1-9005 Cayman Islands The principal business office of Hayfin Opal 2020 (B) LP and each of its executive officers is: One Nexus Way Camana Bay George Town, Grand Cayman KY1-9005 Cayman Islands The principal business office of Hayfin SOF II GP Limited and each of its executive officers is: Walkers Corporate Limited 190 Elgin Avenue George Town, Grand Cayman KY1-9008 Cayman Islands The principal business office of Hayfin Special Opportunities Fund II LP and each of its executive officers is: Walkers Corporate Limited 190 Elgin Avenue George Town, Grand Cayman KY1-9008 Cayman Islands The principal business office of Hayfin SOF III AIV GP S.a.r.l. and each of its executive officers is: 15 Boulevard F.W. Raiffeisen L-2411 Luxembourg The principal business office of Hayfin AUS AIV LP - Hostplus Series, and each of its executive officers is: c/o The Corporation Trust Company Corporation Trust Center 1209 Orange Street New Castle County Wilmington, Delaware 19801 The principal business office of Hayfin Special Opportunities Fund III AIV LP and each of its executive officers is: c/o The Corporation Trust Company Corporation Trust Center 1209 Orange Street New Castle County Wilmington, Delaware 19801 The principal business office of Hayfin AUS AIV LP - AUS SOF III Series, and each of its executive officers is: c/o The Corporation Trust Company Corporation Trust Center 1209 Orange Street New Castle County Wilmington, Delaware 19801 Hayfin Management Holdings Limited is a Cayman Islands exempted company. Hayfin Heartflow UK Limited is a limited company incorporated in England and Wales. Hayfin Tourmaline LuxCo S.a.r.l.is a limited liability company incorporated in Luxembourg. Hayfin Healthcare Opportunities Fund GP S.a.r.l. is a limited liability company incorporated in Luxembourg. Hayfin Healthcare Opportunities Invest LP is a Delaware limited partnership. Hayfin SOF III GP S.a.r.l. is a limited liability company incorporated in Luxembourg. Hayfin Special Opportunities Fund III SCSp is a special limited partnership organized in Luxembourg. Hayfin Hostplus GP Limited is a limited company incorporated in England and Wales. Hayfin Hostplus LP is a limited partnership organized in England and Wales. Hayfin Chief GP Limited is a Cayman Islands exempted company. Hayfin Chief LP a Cayman Islands limited partnership. SunHay GP Limited is a Cayman Islands exempted company. SunHay LP is a limited partnership organized in England and Wales. Hayfin Big Cypress GP Limited is a Cayman Islands exempted company. Hayfin Big Cypress LP is a Cayman Islands limited partnership. Hayfin Hamilton GP Limited is a Cayman Islands exempted company. Hayfin Hamilton LP is a limited partnership organized in England and Wales. Hayfin Opal 2020 GP Limited is a Cayman Islands exempted company. Hayfin Opal 2020 (A) LP is a limited partnership organized in England and Wales. Hayfin Opal 2020 (B) LP is a limited partnership organized in England and Wales. Hayfin SOF II GP Limited is a Cayman Islands exempted company. Hayfin Special Opportunities Fund II LP is a Cayman Islands limited partnership. Hayfin SOF III AIV GP S.a.r.l. is a limited liability company incorporated in Luxembourg. Hayfin AUS AIV LP - Hostplus Series, is a Delaware limited partnership. Hayfin Special Opportunities Fund III AIV LP is a Delaware limited liability company. Hayfin AUS AIV LP - AUS SOF III Series, is a Delaware limited liability company. Y (a) The information required by Item 4(a) is set forth in Row 9 of the cover page for each of the Reporting Persons and is incorporated herein by reference. Hayfin Management Holdings Limited is the sole shareholder of the sole member of the general partner identified in the paragraph that follows for Hayfin Healthcare Opportunities Invest LP. Accordingly, Hayfin Management Holdings Limited may be deemed to beneficially own the shares indirectly held by Hayfin Healthcare Opportunities Invest LP. Hayfin Healthcare Opportunities Fund GP S.a.r.l. is the sole member of Hayfin HF GP LLC, which is the general partner of Hayfin Healthcare Opportunities Fund Invest LP. Accordingly, Hayfin Healthcare Opportunities Fund GP S.a.r.l. may be deemed to beneficially own the shares indirectly held through Hayfin Heartflow UK Limited and Hayfin Tourmaline Luxco S.a.r.l., respectively, by Hayfin HF GP LLC, which is the general partner of Hayfin Healthcare Opportunities Fund Invest LP. The foregoing should not be construed in and of itself as an admission by any reporting person as to beneficial ownership of any shares owned by another reporting person. Hayfin Management Holdings Limited and Hayfin Healthcare Opportunities Fund GP S.a.r.l. each disclaim beneficial ownership of such securities except to the extent of their pecuniary interests therein. The information required by Item 4(b) is set forth in Row 11 of the cover page for each of the Reporting Persons and is incorporated herein by reference. Transactions resulting in less than 5% beneficial ownership in aggregate in the Issuer occurred on February 6, 2026. The information in Row 11 is calculated on the basis of 85,757,754 shares of Class A Common Stock issued and outstanding as of February 28, 2026 as reported by the Issuer in the Annual Report on Form 10-K filed by the Issuer with the Securities and Exchange Commission on March 18, 2026. See Cover Pages Items 5-9. See Cover Pages Items 5-9. See Cover Pages Items 5-9. See Cover Pages Items 5-9. N Y N Hayfin Management Holdings Limited has the right to receive or the power to direct the receipt of dividends from, or the proceeds from the sale of, the shares of Class A Common Stock reported herein. Y N See Exhibit 99.1 (previously filed). Y Y Hayfin Management Holdings Limited By: /s/ David Rushford 05/11/2026 Hayfin Heartflow UK Limited By: /s/ Jessica Gray 05/11/2026 Hayfin Tourmaline LuxCo S.a.r.l. By: /s/ Jean-Christophe Gladek 05/11/2026 By: /s/ Virginie Brousmiche 05/11/2026 Hayfin Healthcare Opportunities Fund GP S.a.r.l. By: /s/ Jean-Christophe Gladek 05/11/2026 By: /s/ Virginie Brousmiche 05/11/2026 Hayfin Healthcare Opportunities Invest LP acting by its general partner, HAYFIN HF GP LLC, acting by its sole member, Hayfin Healthcare Opportunities Fund GP S.a.r.l., By: /s/ Jean-Christophe 05/11/2026 By: /s/ Virginie Brousmiche 05/11/2026 Hayfin SOF III GP S.a.r.l. By: /s/ Jean-Christophe Gladek 05/11/2026 By: /s/ Virginie Brousmiche 05/11/2026 Hayfin Special Opportunities Fund III SCSp acting by its general partner, HAYFIN SOF III GP S.A.R.L., By: /s/ Jean-Christophe Gladek 05/11/2026 By: /s/ Virginie Brousmiche 05/11/2026 Hayfin Hostplus GP Limited By: /s/ Anneka Bavalia 05/11/2026 Hayfin Hostplus LP acting by its general partner, HAYFIN HOSTPLUS GP LIMITED, By: /s/ Anneka Bavalia 05/11/2026 Hayfin Chief GP Limited By: /s/ Anneka Bavalia 05/11/2026 Hayfin Chief LP acting by its general partner, HAYFIN CHIEF GP LIMITED, By: /s/ Anneka Bavalia 05/11/2026 SunHay GP Limited By: /s/ Anneka Bavalia 05/11/2026 SunHay LP acting by its general partner, SUNHAY GP LIMITED, By: /s/ Anneka Bavalia 05/11/2026 Hayfin Big Cypress GP Limited By: /s/ Anneka Bavalia 05/11/2026 Hayfin Big Cypress LP acting by its general partner, HAYFIN BIG CYPRESS GP LIMITED, By: /s/ Anneka Bavalia 05/11/2026 Hayfin Hamilton GP Limited By: /s/ Anneka Bavalia 05/11/2026 Hayfin Hamilton LP acting by its general partner, HAYFIN HAMILTON GP LIMITED, By: /s/ Anneka Bavalia 05/11/2026 Hayfin Opal 2020 GP Limited By: /s/ Anneka Bavalia 05/11/2026 Hayfin Opal 2020 (A) LP acting by its general partner, HAYFIN OPAL 2020 GP LIMITED, By: /s/ Anneka Bavalia 05/11/2026 Hayfin Opal 2020 (B) LP acting by its general partner, HAYFIN OPAL 2020 GP LIMITED, By: /s/ Anneka Bavalia 05/11/2026 Hayfin SOF II GP Limited By: /s/ Anneka Bavalia 05/11/2026 Hayfin Special Opportunities Fund II LP acting by its general partner, HAYFIN SOF II GP LP, acting by its general partner, HAYFIN SOF II GP LIMITED, By: /s/ Anneka Bavalia 05/11/2026 Hayfin SOF III AIV GP S.a.r.l. By: /s/ Tej Gujadhur 05/11/2026 By: /s/ Virginie Brousmiche 05/11/2026 Hayfin AUS AIV LP - Hostplus Series acting by its general partner, HAYFIN AUS AIV GP LLC, acting by its member, HAYFIN SOF III AIV GP S.A.R.L. -, By: /s/ Tej Gujadhur 05/11/2026 By: /s/ Virginie Brousmiche 05/11/2026 Hayfin Special Opportunities Fund III AIV LP acting by its general partner, HAYFIN SOF III AIV GP LLC, acting by its sole member, HAYFIN SOF III AIV GP S.A.R.L., By: /s/ Tej Gujadhur 05/11/2026 By: /s/ Virginie Brousmiche 05/11/2026 Hayfin AUS AIV LP - AUS SOF III Series acting by its general partner, HAYFIN AUS AIV GP LLC, acting by its member, HAYFIN SOF III AIV GP S.A.R.L., By: /s/ Tej Gujadhur 05/11/2026 By: /s/ Virginie Brousmiche 05/11/2026