Define Ventures — 2025 Investments
3 investments dated 2025 · listed companies and verified rows first · show all
Boston, US
Walter Raymond Cooper(Executive Officer, Director, Promoter)
BoardAdam Reich(Director)
Board seatLynne Chou O'Keefe· per SEC Form D · $4M raise · filed Jul 2025
Co-investorsQuiet Capital
San Francisco, US
David Hughes(Executive Officer, Director)Shruti Tibrewala(Executive Officer, Director)
Layer Health builds AI tools for hospitals and health systems that automate clinical registry abstraction and custom quality-metric extraction across service lines such as cardiovascular, surgery, and oncology.
AI & Machine LearningDigital HealthHealthtechBoston, US
David A. Sontag(Executive Officer, Director)Luke Murray(Founder)inDivya Gopinath(Founder)in
BoardLynne O'Keefe(Director)Anthony Philippakis(Director)in
Co-investorsEast Post Road VenturesFlare Capital PartnersGV (Google Ventures)
Rows marked “SEC filing” are inferred from directors named on the company's SEC Form D — public regulatory data, not a portfolio list published by the firm.