Zachary Greenberg
Solo GP · San Francisco, California
Named as one of two individuals (Managing Partner of the General Partner of the Issuer) on the Form D for 18W 2026 Opportunity Fund I, L.P., a $260K venture SPV (Sep 2026) (4 vehicles on file: 1 fund, 3 SPVs).
Angel Investment Confidence Score
Algorithmic score indicating recent deal velocity, check size reliability, and investment conviction in early-stage startups.
Why Zachary Greenberg holds a 93/100 confidence score
- Verified active check-writing activity within the last 12 months
- Target check sizes calibrated between $500K–$1.5M
- Clear domain thesis in Deep Tech
- Named as one of two individuals (Managing Partner of the General Partner of the Issuer) on the Form D for 18W 2026 Opportunity Fund I, L.P., a $260K venture SPV (Sep 2026) (4 vehicles on file: 1 fund, 3 SPVs).
Building in Deep Tech? See how well your pitch deck matches Zachary Greenberg’s thesis.
Check My Startup FitVerified investment track record
Named as one of two individuals (Managing Partner of the General Partner of the Issuer) on the Form D for 18W 2026 Opportunity Fund I, L.P., a $260K venture SPV (Sep 2026) (4 vehicles on file: 1 fund, 3 SPVs).
Source: SEC Form D: 18W 2026 Opportunity Fund I, L.P. (Sep 17, 2026) · 3 more sources
- Stages
- Pre-seed, Seed
- Typical check (est.)
- $500K–$1.5M
- Verified deals
- 1 on file
- Latest activity
- Sep 2026
Is Zachary Greenberg a fit for you?
See your AI startup fit score, verified contact channels, and warm paths through your network.
What sectors does Zachary Greenberg back?
Deep TechVerified investments & deal activity
1 deal trackedRecent startup investments, syndicate rounds, and public co-investments across the US and Europe.
- Jan 2026
18 West Fund I, L.P.
Invested through a fund
Public Verification Sources
- SEC Form D: 18W 2026 Opportunity Fund I, L.P.Sep 17, 2026
- SEC Form D: 18 West Alpha I, L.P.Mar 12, 2026
- SEC Form D: 18 West Fund I, L.P.Jan 27, 2026
- SEC Form D: 18W Quantum Opportunity Fund II, L.P.Dec 19, 2024
Data refreshed from SEC filings and public European announcements Oct 15, 2026. Is this you? Correct or remove this profile.
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