Bill Welch is an angel investor based in El Dorado Hills, California, United States with one known investment, Serimmune.
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Investment focus
- Sector
- Healthcare
Contacts
Bill Welch portfolio company (1)
- Serimmune
Investor Profile
The known portfolio sits in sector Healthcare, and focus areas Bioinformatics, Biotech, Cellular Therapy and Digital Health.
The stage tags on this profile are Seed and Series A.
The portfolio and focus above give founders context on whether Bill Welch matches their raise.
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Frequently asked questions
Who is Bill Welch?
Bill Welch is an angel investor based in El Dorado Hills, California, United States with one known investment on file, Serimmune. The sections above list the sectors and stages attached to that record.
What does Bill Welch invest in?
Listed sectors include Healthcare; listed focus areas include Bioinformatics, Biotech, Cellular Therapy and Digital Health. Those tags come from the companies attached to this profile, so they read as a record of what has been backed rather than a stated preference for what comes next.
What stage does Bill Welch invest at?
The database lists Bill Welch for Seed and Series A rounds. Stage is the strongest single filter when you build a target list: an investor with no record at your stage rarely starts with you.
How do I contact Bill Welch?
An email address, a phone number and a LinkedIn page are on file for Bill Welch. The address stays masked on this page and is readable inside RaiseHunt after you create an account.
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Data: RaiseHunt investor dataset · Snapshot 6 September 2026 · How this data is built · Report a correction or request removal