John Grossman is an angel investor based in Waltham, Massachusetts, United States with 4 known investments: Equinox, Cleaner Castle, Harper Resources and RNow.
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Investment focus
- Sector
- AIEnergyHealthcare
Contacts
John Grossman portfolio companies (4)
- Equinox
- Cleaner Castle
- Harper Resources
- RNow
Investor Profile
The known portfolio sits in sectors AI, Energy and Healthcare, and focus areas Bioinformatics, Biotech, Clinical Trials and Drug Discovery.
Reviewing the investment history helps decide whether there is a realistic fit before reaching out.
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Frequently asked questions
Who is John Grossman?
John Grossman is an angel investor based in Waltham, Massachusetts, United States with 4 known investments on file, among them Equinox, Cleaner Castle and Harper Resources. The sections above list the sectors attached to that record.
What does John Grossman invest in?
Listed sectors include AI, Energy and Healthcare; listed focus areas include Bioinformatics, Biotech, Clinical Trials and Drug Discovery. 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.
How do I contact John Grossman?
An email address, a phone number and a LinkedIn page are on file for John Grossman. 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 5 September 2026 · How this data is built · Report a correction or request removal