Jason Blumberg
Solo GP · Chicago, Illinois
Named as one of two individuals (Manager of the General Partner of the Issuer) on the Form D for ISEIFoundation, LP B, a $10.8M venture fund (Aug 2023). Also a non-executive director at 2 startups that filed Form D.
Angel Investment Confidence Score
Algorithmic score indicating recent deal velocity, check size reliability, and investment conviction in early-stage startups.
Why Jason Blumberg holds a 86/100 confidence score
- Verified active check-writing activity within the last 12 months
- Target check sizes calibrated between $100K–$300K
- Clear domain thesis in B2B Software, Climate & Energy, Industrial & Manufacturing
- Named as one of two individuals (Manager of the General Partner of the Issuer) on the Form D for ISEIFoundation, LP B, a $10.8M venture fund (Aug 2023). Also a non-executive director at 2 startups that filed Form D.
Building in B2B Software, Climate & Energy, Industrial & Manufacturing? See how well your pitch deck matches Jason Blumberg’s thesis.
Check My Startup FitVerified investment track record
Named as one of two individuals (Manager of the General Partner of the Issuer) on the Form D for ISEIFoundation, LP B, a $10.8M venture fund (Aug 2023). Also a non-executive director at 2 startups that filed Form D.
Source: SEC Form D: ISEIFoundation, LP B (Aug 30, 2023) · 2 more sources
- Stages
- Pre-seed to Series A
- Typical check (est.)
- $100K–$300K
- Verified deals
- 3 on file
- Latest activity
- Oct 2025
Is Jason Blumberg a fit for you?
See your AI startup fit score, verified contact channels, and warm paths through your network.
What sectors does Jason Blumberg back?
B2B SoftwareClimate & EnergyIndustrial & ManufacturingVerified investments & deal activity
3 deals trackedRecent startup investments, syndicate rounds, and public co-investments across the US and Europe.
Public Verification Sources
- SEC Form D: ISEIFoundation, LP BAug 30, 2023
- SEC Form D (board seat): Recurve AnalyticsApr 24, 2025
- SEC Form D (board seat): NxLite TechnologiesOct 27, 2025
Data refreshed from SEC filings and public European announcements Oct 15, 2026. Is this you? Correct or remove this profile.
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