Check the appropriate box to designate the rule pursuant to which this Schedule is filed:
   Rule 13d-1(b)
   Rule 13d-1(c)
   Rule 13d-1(d)




schemaVersion:


SCHEDULE 13G




Comment for Type of Reporting Person:   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.


SCHEDULE 13G




Comment for Type of Reporting Person:   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.


SCHEDULE 13G




Comment for Type of Reporting Person:   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.


SCHEDULE 13G




Comment for Type of Reporting Person:   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.


SCHEDULE 13G




Comment for Type of Reporting Person:   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.


SCHEDULE 13G




Comment for Type of Reporting Person:   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.


SCHEDULE 13G




Comment for Type of Reporting Person:   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.


SCHEDULE 13G




Comment for Type of Reporting Person:   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.


SCHEDULE 13G




Comment for Type of Reporting Person:   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.


SCHEDULE 13G




Comment for Type of Reporting Person:   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.


SCHEDULE 13G




Comment for Type of Reporting Person:   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.


SCHEDULE 13G




Comment for Type of Reporting Person:   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.


SCHEDULE 13G




Comment for Type of Reporting Person:   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.


SCHEDULE 13G




Comment for Type of Reporting Person:   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.


SCHEDULE 13G




Comment for Type of Reporting Person:   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.


SCHEDULE 13G





SCHEDULE 13G





SCHEDULE 13G




Comment for Type of Reporting Person:   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.


SCHEDULE 13G




Comment for Type of Reporting Person:   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.


SCHEDULE 13G




Comment for Type of Reporting Person:   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.


SCHEDULE 13G




Comment for Type of Reporting Person:   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.


SCHEDULE 13G




Comment for Type of Reporting Person:   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.


SCHEDULE 13G




Comment for Type of Reporting Person:   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.


SCHEDULE 13G




Comment for Type of Reporting Person:   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.


SCHEDULE 13G




Comment for Type of Reporting Person:   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.


SCHEDULE 13G




Comment for Type of Reporting Person:   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.


SCHEDULE 13G



 
Hayfin Management Holdings Limited
 
Signature:By: /s/ David Rushford
Name/Title:David Rushford, Authorised Signatory
Date:05/11/2026
 
Hayfin Heartflow UK Limited
 
Signature:By: /s/ Jessica Gray
Name/Title:Jessica Gray, Director
Date:05/11/2026
 
Hayfin Tourmaline LuxCo S.a.r.l.
 
Signature:By: /s/ Jean-Christophe Gladek
Name/Title:Jean-Christophe Gladek, Manager
Date:05/11/2026
 
Signature:By: /s/ Virginie Brousmiche
Name/Title:Virginie Brousmiche, Manager
Date:05/11/2026
 
Hayfin Healthcare Opportunities Fund GP S.a.r.l.
 
Signature:By: /s/ Jean-Christophe Gladek
Name/Title:Jean-Christophe Gladek, Manager
Date:05/11/2026
 
Signature:By: /s/ Virginie Brousmiche
Name/Title:Virginie Brousmiche, Manager
Date:05/11/2026
 
Hayfin Healthcare Opportunities Invest LP
 
Signature: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
Name/Title:Jean-Christophe Gladek, Manager
Date:05/11/2026
 
Signature:By: /s/ Virginie Brousmiche
Name/Title:Virginie Brousmiche, Manager
Date:05/11/2026
 
Hayfin SOF III GP S.a.r.l.
 
Signature:By: /s/ Jean-Christophe Gladek
Name/Title:Jean-Christophe Gladek, Manager
Date:05/11/2026
 
Signature:By: /s/ Virginie Brousmiche
Name/Title:Virginie Brousmiche, Manager
Date:05/11/2026
 
Hayfin Special Opportunities Fund III SCSp
 
Signature:acting by its general partner, HAYFIN SOF III GP S.A.R.L., By: /s/ Jean-Christophe Gladek
Name/Title:Jean-Christophe Gladek, Manager
Date:05/11/2026
 
Signature:By: /s/ Virginie Brousmiche
Name/Title:Virginie Brousmiche, Manager
Date:05/11/2026
 
Hayfin Hostplus GP Limited
 
Signature:By: /s/ Anneka Bavalia
Name/Title:Anneka Bavalia, Director
Date:05/11/2026
 
Hayfin Hostplus LP
 
Signature:acting by its general partner, HAYFIN HOSTPLUS GP LIMITED, By: /s/ Anneka Bavalia
Name/Title:Anneka Bavalia, Director
Date:05/11/2026
 
Hayfin Chief GP Limited
 
Signature:By: /s/ Anneka Bavalia
Name/Title:Anneka Bavalia, Director
Date:05/11/2026
 
Hayfin Chief LP
 
Signature:acting by its general partner, HAYFIN CHIEF GP LIMITED, By: /s/ Anneka Bavalia
Name/Title:Anneka Bavalia, Director
Date:05/11/2026
 
SunHay GP Limited
 
Signature:By: /s/ Anneka Bavalia
Name/Title:Anneka Bavalia, Director
Date:05/11/2026
 
SunHay LP
 
Signature:acting by its general partner, SUNHAY GP LIMITED, By: /s/ Anneka Bavalia
Name/Title:Anneka Bavalia, Director
Date:05/11/2026
 
Hayfin Big Cypress GP Limited
 
Signature:By: /s/ Anneka Bavalia
Name/Title:Anneka Bavalia, Director
Date:05/11/2026
 
Hayfin Big Cypress LP
 
Signature:acting by its general partner, HAYFIN BIG CYPRESS GP LIMITED, By: /s/ Anneka Bavalia
Name/Title:Anneka Bavalia, Director
Date:05/11/2026
 
Hayfin Hamilton GP Limited
 
Signature:By: /s/ Anneka Bavalia
Name/Title:Anneka Bavalia, Director
Date:05/11/2026
 
Hayfin Hamilton LP
 
Signature:acting by its general partner, HAYFIN HAMILTON GP LIMITED, By: /s/ Anneka Bavalia
Name/Title:Anneka Bavalia, Director
Date:05/11/2026
 
Hayfin Opal 2020 GP Limited
 
Signature:By: /s/ Anneka Bavalia
Name/Title:Anneka Bavalia, Director
Date:05/11/2026
 
Hayfin Opal 2020 (A) LP
 
Signature:acting by its general partner, HAYFIN OPAL 2020 GP LIMITED, By: /s/ Anneka Bavalia
Name/Title:Anneka Bavalia, Director
Date:05/11/2026
 
Hayfin Opal 2020 (B) LP
 
Signature:acting by its general partner, HAYFIN OPAL 2020 GP LIMITED, By: /s/ Anneka Bavalia
Name/Title:Anneka Bavalia, Director
Date:05/11/2026
 
Hayfin SOF II GP Limited
 
Signature:By: /s/ Anneka Bavalia
Name/Title:Anneka Bavalia, Director
Date:05/11/2026
 
Hayfin Special Opportunities Fund II LP
 
Signature:acting by its general partner, HAYFIN SOF II GP LP, acting by its general partner, HAYFIN SOF II GP LIMITED, By: /s/ Anneka Bavalia
Name/Title:Anneka Bavalia, Director
Date:05/11/2026
 
Hayfin SOF III AIV GP S.a.r.l.
 
Signature:By: /s/ Tej Gujadhur
Name/Title:Tej Gujadhur, Manager
Date:05/11/2026
 
Signature:By: /s/ Virginie Brousmiche
Name/Title:Virginie Brousmiche, Manager
Date:05/11/2026
 
Hayfin AUS AIV LP - Hostplus Series
 
Signature: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
Name/Title:Tej Gujadhur, Manager
Date:05/11/2026
 
Signature:By: /s/ Virginie Brousmiche
Name/Title:Virginie Brousmiche, Manager
Date:05/11/2026
 
Hayfin Special Opportunities Fund III AIV LP
 
Signature: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
Name/Title:Tej Gujadhur, Manager
Date:05/11/2026
 
Signature:By: /s/ Virginie Brousmiche
Name/Title:Virginie Brousmiche, Manager
Date:05/11/2026
 
Hayfin AUS AIV LP - AUS SOF III Series
 
Signature: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
Name/Title:Tej Gujadhur, Manager
Date:05/11/2026
 
Signature:By: /s/ Virginie Brousmiche
Name/Title:Virginie Brousmiche, Manager
Date:05/11/2026