John Hennessey

Active Investor

Angel Investor at Siva Therapeutics, Inc.

Weston, Massachusetts

John Hennessey, Angel Investor at Siva Therapeutics, Inc. is an active investor based in Weston, Massachusetts. This profile covers what John Hennessey backs, at which stage, and how founders can reach out in 2026.

Investor type: AngelInvestor
Stages: Pre SeedSeed
Invests in: Healthcare & BiotechDigital Health & HealthTechBiotech & PharmaMedTech & Medical DevicesSaaS & EnterpriseRobotics & AutomationIoT & Connected Devices
Location: Weston, Massachusetts
Typical check: $150K
Past investments: 8

Notable investments

Town of Weston MAThe Evergreen State College FoundationBoston Harbor Angels Inc.Wonk newmediaSiva Therapeutics IncBrain Injury Association of MassachusettsCommonwealth of MassachusettsThe Evergreen State College Alumni Association

How to reach John Hennessey

Angels and operators like John Hennessey reply to specific, personalized notes that show real traction, not mass blasts. Build a verified list, write a note that fits their thesis, and track replies, all on Round Funded.

Frequently Asked Questions

What does John Hennessey invest in?

John Hennessey invests in Healthcare & Biotech, Digital Health & HealthTech, Biotech & Pharma and MedTech & Medical Devices, typically at Pre Seed and Seed. Match your sector and stage, then reach out with a personalized pitch.