John Zak works as an Investor at Portal Capital. The firm's known portfolio counts 5 companies.
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Investment focus
- Sector
- HardwareHealthcareSaaS
- Focus
- BiotechDigital HealthEnterprise SaaSHealthcare OperationsMedTechSemiconductorsSmall-market Private Equity
Contacts
Affiliated funds' portfolios
Investor at Portal Capital, whose known portfolio counts 5 companies
- Naurex
- PortalPlayer
- Theravasc
- COMS Interactive
- Magnum Technologies
Investor Profile
John Zak is listed against sectors Hardware, Healthcare and SaaS, and focus areas Biotech, Digital Health, Enterprise SaaS and Healthcare Operations in the database.
Stage-wise, the deals at Portal Capital cluster around Growth, Seed and Series A rounds.
What the affiliated firm has backed is the closest available signal on whether John Zak is worth approaching.
Frequently asked questions
Who is John Zak?
John Zak is a private equity investor based in Beachwood, Ohio, United States, listed as Investor at Portal Capital. The known portfolio of that firm counts 5 companies. That portfolio belongs to the firm, not to John Zak personally.
What does John Zak invest in?
Listed sectors include Hardware, Healthcare and SaaS; listed focus areas include Biotech, Digital Health, Enterprise SaaS and Healthcare Operations. 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 Zak invest at?
Portal Capital appears in Growth, Seed and Series A rounds across its known deals, and John Zak is listed there as Investor. 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 Zak listed at?
John Zak is listed as Investor at Portal Capital, whose known portfolio counts 5 companies.
How do I contact John Zak?
A LinkedIn page is on file for John Zak. 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