Positive Sum

VC firm · Greenwich, CT

Verified active in the last 12 monthsSEC-registered adviser

Venture firm based in Greenwich, CT. Most recent fund on file: Positive Sum Conviction Fund, LP ($100M offering), filed Aug 2026. Partners sit on the boards of 2 startups that raised recently.

“We back founders pursuing their life’s work.” (from the firm’s website)

Stages: Seed, Series A
Typical check (est.): $1M–$3M
Latest fund: $100M · Aug 2026
Last verified activity: Aug 2026

Focus

AI & MLCybersecurityB2B Software

Recent portfolio activity

Prefect Technologies
Board seat · DC
Aug 2026
Vali Cyber
Board seat · VA
Jul 2023

Funds and vehicles on SEC file

Positive Sum Conviction Fund, LP
Fund · $100M offering
Aug 2026
Positive Sum Capital IV, LP
Fund · $400M offering
Aug 2026
Positive Sum SR Holdings, LLC
Fund · $5.3M offering
Mar 2026
Positive Sum EAI Holdings, LLC
Fund · $42.5M offering
Mar 2026
Positive Sum Capital III, L.P.
Fund · $400M offering
Dec 2024

Sources

SEC Form D: Positive Sum Conviction Fund, LPAug 14, 2026
SEC Form D: Positive Sum Capital IV, LPAug 12, 2026
SEC Form D: Positive Sum SR Holdings, LLCMar 24, 2026
SEC Form D: Positive Sum EAI Holdings, LLCMar 13, 2026
SEC Form D: Positive Sum Capital III, L.P.Dec 12, 2024
SEC adviser record: Positive SUM Advisors LLCMar 27, 2026
Firm websiteOct 12, 2026

Profile last verified Oct 12, 2026. Is this you? Correct or remove this profile.