John Hennessey
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 & BiotechFintechDigital Health & HealthTech
- Location
- Weston, Massachusetts
- Typical check
- $150K
- Past investments
- 8
Notable investments
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 Accelerator.
Connect with John Hennessey
Frequently Asked Questions
What does John Hennessey invest in?
John Hennessey invests in Healthcare & Biotech, Fintech and Digital Health & HealthTech, typically at Pre Seed and Seed. Match your sector and stage, then reach out with a personalized pitch.
What stage does John Hennessey invest at?
John Hennessey typically invests at Pre Seed and Seed. Lead with traction that fits the stage when you reach out.
What is John Hennessey's typical check size?
John Hennessey typically writes checks around $150K. Use it as a signal for whether your raise fits their stage.
How do I contact John Hennessey?
Unlock John Hennessey's verified email on Round Funded Accelerator and send a personalized pitch. We surface only deliverable contacts so your outreach lands.