Neil Sirni
Solo GP · New York, New York
Named as the only individual (Managing Member of the Managing Member) on the Form D for Proximity Exploration I, LLC, a $11.3M venture fund (Oct 2025) (4 vehicles on file: 3 funds, 1 SPV).
Angel Investment Confidence Score
Algorithmic score indicating recent deal velocity, check size reliability, and investment conviction in early-stage startups.
Why Neil Sirni holds a 80/100 confidence score
- Verified active check-writing activity within the last 12 months
- Target check sizes calibrated between $125K–$350K
- Clear domain thesis in Healthcare
- Named as the only individual (Managing Member of the Managing Member) on the Form D for Proximity Exploration I, LLC, a $11.3M venture fund (Oct 2025) (4 vehicles on file: 3 funds, 1 SPV).
Building in Healthcare? See how well your pitch deck matches Neil Sirni’s thesis.
Check My Startup FitVerified investment track record
Named as the only individual (Managing Member of the Managing Member) on the Form D for Proximity Exploration I, LLC, a $11.3M venture fund (Oct 2025) (4 vehicles on file: 3 funds, 1 SPV).
Source: SEC Form D: Proximity Exploration I, LLC (Oct 28, 2025) · 3 more sources
- Stages
- Pre-seed, Seed
- Typical check (est.)
- $125K–$350K
- Verified deals
- 3 on file
- Latest activity
- Oct 2025
Is Neil Sirni a fit for you?
See your AI startup fit score, verified contact channels, and warm paths through your network.
What sectors does Neil Sirni back?
HealthcareVerified 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: Proximity Exploration I, LLCOct 28, 2025
- SEC Form D: Proximity Health I, LLCOct 31, 2024
- SEC Form D: Proximity Fifth Down I, LLCJul 29, 2024
- SEC Form D: Proximity Mack Ventures, LLCDec 13, 2023
Data refreshed from SEC filings and public European announcements Oct 15, 2026. Is this you? Correct or remove this profile.
Active Angels Similar to Neil Sirni
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Raising pre-seed or seed for your startup?
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