William Barnes
Angel investor in San Diego
San Diego, California
William Barnes, Angel investor in San Diego is an active investor based in San Diego, California. This profile covers what William Barnes backs, at which stage, and how founders can reach out in 2026.
Mr. William Barnes is an Angel Investor.
- Investor type
- Angel
- Stages
- Early Stage VentureSeed
- Invests in
- Artificial IntelligenceHealthcare & BiotechBiotech & PharmaSaaS & EnterpriseClimate & EnergyHardware & Deep TechIoT & Connected DevicesPropTech & Real Estate
- Location
- San Diego, California
- Typical check
- $375K
- Past investments
- 12
Notable investments
Snackpass
Mint HouseIonis Pharmaceuticals, Inc.AraLeverage AIReplenyshBelong (Real Estate Services)
Replicated
GrabrSteereoHow to reach William Barnes
Angels and operators like William Barnes 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 William Barnes
Frequently Asked Questions
What does William Barnes invest in?
William Barnes invests in Artificial Intelligence, Healthcare & Biotech, Biotech & Pharma and SaaS & Enterprise, typically at Early Stage Venture and Seed. Match your sector and stage, then reach out with a personalized pitch.
What stage does William Barnes invest at?
William Barnes typically invests at Early Stage Venture and Seed. Lead with traction that fits the stage when you reach out.
What is William Barnes's typical check size?
William Barnes typically writes checks around $375K. Use it as a signal for whether your raise fits their stage.
How do I contact William Barnes?
Unlock William Barnes's verified email on Round Funded Accelerator and send a personalized pitch. We surface only deliverable contacts so your outreach lands.