An angel investor based in Milwaukee, Wisconsin, United States, Stephen Einhorn has 16 known investments, including Hologram, Blue Pillar, CytoPherx, FactoryFix, SkySpecs, Sierra Oncology, Lumanu, AIQ Solutions, HarQen, PegEx, Health Scholars and enosiX.
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Investment focus
Contacts
Stephen Einhorn portfolio companies (16)
- Hologram
- Blue Pillar
- CytoPherx
- FactoryFix
- SkySpecs
- Sierra Oncology
- Lumanu
- AIQ Solutions
- HarQen
- PegEx
- Health Scholars
- enosiX
- OnKöl
- Textel
- ThirdPartyTrust
- VitalMedix
Investor Profile
Founders in the listed sectors Climate, FinTech, Healthcare and SaaS, and focus areas Analytics, Clean Energy, Digital Health and Enterprise SaaS will recognize the pattern in this portfolio.
The portfolio and focus above give founders context on whether Stephen Einhorn matches their raise.
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Frequently asked questions
Who is Stephen Einhorn?
Stephen Einhorn is an angel investor based in Milwaukee, Wisconsin, United States with 16 known investments on file, among them Hologram, Blue Pillar and CytoPherx. The sections above list the sectors attached to that record.
What does Stephen Einhorn invest in?
Listed sectors include Climate, FinTech, Healthcare and SaaS; listed focus areas include Analytics, Clean Energy, Digital Health and Enterprise SaaS. 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 Stephen Einhorn?
A LinkedIn page is on file for Stephen Einhorn. 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