Jason Blumberg

Solo GP · Chicago, IL

Verified active in the last 12 months

Jason Blumberg is a solo GP based in Chicago, IL focused on B2B Software, Climate & Energy, Industrial & Manufacturing, investing at pre-seed to series a stage. Jason Blumberg's most recent fund with a disclosed size, ISEIFoundation, LP B, filed a $10.8M offering with the SEC in Aug 2023. Estimated typical check: $100K–$300K. Jason Blumberg has dated investing activity in the last 12 months (latest Oct 2025).

Why Jason Blumberg is listed

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

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Stages: Pre-seed to Series A
Typical check (est.): $100K–$300K
Latest fund: $10.8M · Aug 2023
Latest dated activity: Oct 2025

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What does Jason Blumberg invest in?

B2B SoftwareClimate & EnergyIndustrial & Manufacturing

What has Jason Blumberg invested in recently?

NxLite Technologies
Board seat on the company's SEC filing (not by itself proof of an investment) · MI
Oct 2025
Recurve Analytics
Board seat on the company's SEC filing (not by itself proof of an investment) · CA
Apr 2025
ISEIFoundation, LP B
Invested through a fund
Aug 2023

Funds and deal vehicles Jason Blumberg filed with the SEC

ISEIFoundation, LP B
Fund · $10.8M offering
Aug 2023

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 public sources Oct 15, 2026. Is this you? Remove or correct this profile.