SCHEDULE 13G

HeartFlow Inc

Class A Common Stock, $0.001 par value · CUSIP: 42238D107

Event date: 2025-09-30

Reporting persons may disclose overlapping interests. Their amounts are shown individually and are not added into a filing total.

Filing-level shares

Unavailable

Percent of class

Unavailable

• Hayfin Management Holdings Limited

  Shares: 5,283,264 · Class: 6.2%

• Hayfin Heartflow UK Limited

  Shares: 3,635,597 · Class: 4.3%

• Hayfin Tourmaline LuxCo S.a.r.l.

  Shares: 1,647,667 · Class: 1.9%

• Hayfin Healthcare Opportunities Fund GP S.a.r.l.

  Shares: 1,267,181 · Class: 1.5%

• Hayfin Healthcare Opportunities Invest LP

  Shares: 1,267,181 · Class: 1.5%

• Hayfin SOF III GP S.a.r.l.

  Shares: 1,174,580 · Class: 1.4%

• Hayfin Special Opportunities Fund III SCSp

  Shares: 1,174,580 · Class: 1.4%

• Hayfin Hostplus GP Limited

  Shares: 123,243 · Class: 0.1%

• Hayfin Hostplus LP

  Shares: 123,243 · Class: 0.1%

• Hayfin Chief GP Limited

  Shares: 236,807 · Class: 0.3%

• Hayfin Chief LP

  Shares: 236,807 · Class: 0.3%

• SunHay GP Limited

  Shares: 217,086 · Class: 0.3%

• SunHay LP

  Shares: 217,086 · Class: 0.3%

• Hayfin Big Cypress GP Limited

  Shares: 246,672 · Class: 0.3%

• Hayfin Big Cypress LP

  Shares: 246,672 · Class: 0.3%

• Hayfin Hamilton GP Limited

  Shares: 97,498 · Class: 0.1%

• Hayfin Hamilton LP

  Shares: 97,498 · Class: 0.1%

• Hayfin Opal 2020 GP Limited

  Shares: 968,606 · Class: 1.1%

• Hayfin Opal 2020 (A) LP

  Shares: 241,179 · Class: 0.3%

• Hayfin Opal 2020 (B) LP

  Shares: 326,315 · Class: 0.4%

• Hayfin SOF II GP Limited

  Shares: 311,971 · Class: 0.4%

• Hayfin Special Opportunities Fund II LP

  Shares: 311,971 · Class: 0.4%

• Hayfin SOF III AIV GP S.a.r.l.

  Shares: 1,040,732 · Class: 1.2%

• Hayfin AUS AIV LP - Hostplus Series

  Shares: 100,209 · Class: 0.1%

• Hayfin Special Opportunities Fund III AIV LP

  Shares: 798,665 · Class: 0.9%

• Hayfin AUS AIV LP - AUS SOF III Series

  Shares: 141,858 · Class: 0.2%

Amounts are as disclosed in this filing. Schedule type alone does not establish investment intent.