---
schema_version: "secwatch.filing_event.v1"
accession: "0001628280-25-039636"
form_type: "8-K"
ticker: "HTFL"
cik: "0001464521"
company_name: "Heartflow, Inc."
filed_at: "2025-08-11T23:59:59+00:00"
generated_at: "2026-05-17T15:21:53.215561+00:00"
event_type: "other_material"
sentiment: "positive"
materiality_score: 0.9
calibrated_materiality_score: 0.9
confidence: "high"
source: SEC EDGAR
---

# Heartflow completes IPO of 19.2M shares at $19.00; gross proceeds ~$364M

## Summary
- IPO closed August 11, 2025; 19,166,667 shares sold including 2.5M overallotment shares.
- Public offering price $19.00 per share; gross proceeds approximately $364 million.
- Amended and restated certificate of incorporation and bylaws effective upon IPO closing.
- Common stock now trades on Nasdaq Global Select Market under symbol HTFL.

## SEC filing metadata
- accession: 0001628280-25-039636
- form_type: 8-K
- ticker: HTFL
- cik: 0001464521
- company_name: Heartflow, Inc.
- filed_at: 2025-08-11T23:59:59+00:00
- event_type: other_material
- sentiment: positive
- materiality_score: 0.9
- calibrated_materiality_score: 0.9
- confidence: high
- sec_items: 5.03, 8.01, 9.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/1464521/000162828025039636/0001628280-25-039636-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/1464521/000162828025039636/heartflow-8xkclosing.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001628280-25-039636
- JSON: https://secwatch.observer/filing/0001628280-25-039636.json
- Plain text: https://secwatch.observer/filing/0001628280-25-039636.txt

## Key facts
- Governance Changes
  Heartflow, Inc.: Amended and Restated Certificate of Incorporation became effective upon closing of IPO (effective 2025-08-11).
  - Change: charter amendment
  - Effective: 2025-08-11
  source text: In connection with the closing of an initial public offering by Heartflow, Inc. (the “Company”) on August 11, 2025, the Company’s Amended and Restated Certificate of Incorporation and Amended and Restated Bylaws became effective.
  evidence_url: https://www.sec.gov/Archives/edgar/data/1464521/000162828025039636/0001628280-25-039636-index.htm
- Governance Changes
  Heartflow, Inc.: Amended and Restated Bylaws became effective upon closing of IPO (effective 2025-08-11).
  - Change: bylaw amendment
  - Effective: 2025-08-11
  source text: In connection with the closing of an initial public offering by Heartflow, Inc. (the “Company”) on August 11, 2025, the Company’s Amended and Restated Certificate of Incorporation and Amended and Restated Bylaws became effective.
  evidence_url: https://www.sec.gov/Archives/edgar/data/1464521/000162828025039636/0001628280-25-039636-index.htm

This AI-assisted summary is a reading aid. Review the linked SEC EDGAR filing before relying on any specific claim.