Fundraising Fox

Layer Health

Boston, US · Founded 2022 · Delaware corporation · 4 known investors

layerhealth.com ↗
Healthtechin /layerhealth@layerhealth

Founders & leadership

DA
David A. SontagExecutive Officer, Director
LO
Lynne O'KeefeDirector
AP
Anthony PhilippakisDirector

Investors · 4

East Post Road Ventures
Flare Capital PartnersBoston · $1M – $10M
GV (Google Ventures)Mountain View · $250K – $50Mvia Anthony Philippakis · board
Define VenturesreportedSan Francisco · $750K – $6M

Reported raises · per SEC filings

Form D private placements
▶$29.5MraisedDec 2025 · 10 investors · Other Health Care
Rule 506(b)
Officers, directors & promoters on the filing
  • David A. SontagExecutive Officer, Director
  • Lynne O'KeefeDirector
  • Anthony PhilippakisDirector
Offering amount
$29.5M
Amount sold
$29.5M
First sale
Dec 2024
Incorporated
Corporation, Delaware, 2022
Federal exemptions
06b
Full filing on SEC EDGAR ↗

Source: SEC EDGAR Form D. Amounts as filed; amended filings shown once at their latest values.