Zachary Greenberg
Solo GP · San Francisco, CA
Zachary Greenberg is a solo GP based in San Francisco, CA focused on Deep Tech, investing at pre-seed, seed stage. Zachary Greenberg's most recent fund with a disclosed size, 18 West Fund I, L.P., filed a $50M offering with the SEC in Jan 2026. Zachary Greenberg has 4 funds and deal vehicles on SEC file, including 3 single-deal SPVs. Estimated typical check: $500K–$1.5M. Zachary Greenberg has dated investing activity in the last 12 months (latest Sep 2026).
Why Zachary Greenberg is listed
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
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- Stages
- Pre-seed, Seed
- Typical check (est.)
- $500K–$1.5M
- Latest fund
- $50M · Jan 2026
- Latest dated activity
- Sep 2026
Is Zachary Greenberg a fit for you?
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What does Zachary Greenberg invest in?
Deep TechWhat has Zachary Greenberg invested in recently?
- Jan 2026
18 West Fund I, L.P.
Invested through a fund
Funds and deal vehicles Zachary Greenberg filed with the SEC
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 public sources Oct 15, 2026. Is this you? Remove or correct this profile.