John Riney is a family office investor at Castellan Group, whose known portfolio counts 5 companies.
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Investment focus
- Sector
- Healthcare
- Focus
- AgingTechDigital HealthHealthcare OperationsMedTech
Contacts
Affiliated funds' portfolios
Affiliated at Castellan Group, whose known portfolio counts 5 companies
- Segmed
- DUOS
- Medxoom
- Levatas
- WEAV3D
Investor Profile
The listing covers sector Healthcare, and focus areas AgingTech, Digital Health, Healthcare Operations and MedTech. Startups operating in these areas may find John Riney relevant.
Castellan Group appears in Seed and Series A rounds across its known deals.
What the affiliated firm has backed is the closest available signal on whether John Riney is worth approaching.
Colleagues at Castellan Group
Frequently asked questions
Who is John Riney?
John Riney is a family office investor based in United States, listed at Castellan Group. The known portfolio of that firm counts 5 companies. That portfolio belongs to the firm, not to John Riney personally.
What does John Riney invest in?
Listed sectors include Healthcare; listed focus areas include AgingTech, Digital Health, Healthcare Operations and MedTech. Those tags come from the portfolios of the firms this profile is attached to, so they read as a record of what has been backed rather than a stated preference for what comes next.
What stage does John Riney invest at?
Castellan Group appears in Seed and Series A rounds across its known deals, and John Riney is listed there. Stage is the strongest single filter when you build a target list: an investor with no record at your stage rarely starts with you.
Which firm is John Riney listed at?
John Riney is listed at Castellan Group. 2 other people in the database share a firm with John Riney.
How do I contact John Riney?
A LinkedIn page is on file for John Riney. It is readable inside RaiseHunt after you create an account. The database holds no email address and no phone number for this profile.
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Data: RaiseHunt investor dataset · Snapshot 5 September 2026 · How this data is built · Report a correction or request removal