Sean O'Brien
Solo GP · Alpharetta, Georgia
Named as the only individual (executive officer/promoter) on the Form D for Overline Seed Fund II, LP, a $21M venture fund (Mar 2024). Also a non-executive director at 1 startup that filed Form D.
Angel Investment Confidence Score
Algorithmic score indicating recent deal velocity, check size reliability, and investment conviction in early-stage startups.
Why Sean O'Brien holds a 81/100 confidence score
- Verified past startup investments on public record
- Target check sizes calibrated between $200K–$650K
- Clear domain thesis in B2B Software
- Named as the only individual (executive officer/promoter) on the Form D for Overline Seed Fund II, LP, a $21M venture fund (Mar 2024). Also a non-executive director at 1 startup that filed Form D.
Building in B2B Software? See how well your pitch deck matches Sean O'Brien’s thesis.
Check My Startup FitVerified investment track record
Named as the only individual (executive officer/promoter) on the Form D for Overline Seed Fund II, LP, a $21M venture fund (Mar 2024). Also a non-executive director at 1 startup that filed Form D.
Source: SEC Form D: Overline Seed Fund II, LP (Mar 13, 2024) · 1 more source
- Stages
- Pre-seed, Seed
- Typical check (est.)
- $200K–$650K
- Verified deals
- 2 on file
- Latest activity
- Jan 2025
Is Sean O'Brien a fit for you?
See your AI startup fit score, verified contact channels, and warm paths through your network.
What sectors does Sean O'Brien back?
B2B SoftwareVerified investments & deal activity
2 deals trackedRecent startup investments, syndicate rounds, and public co-investments across the US and Europe.
Public Verification Sources
- SEC Form D: Overline Seed Fund II, LPMar 13, 2024
- SEC Form D (board seat): Dink TechnologiesJan 3, 2025
Data refreshed from SEC filings and public European announcements Oct 15, 2026. Is this you? Correct or remove this profile.
Active Angels Similar to Sean O'Brien
Founders raising in saas also reach out to these verified check-writers with similar portfolio focus and check sizes.
Individual angel · Paris, France
Solo GP · London, United Kingdom
Angel group · Essen, Germany
Individual angel · London, United Kingdom
Individual angel · Berlin, Germany
Raising pre-seed or seed for your startup?
Don’t pitch blindly. Our AI engine evaluates your startup against Sean O'Brien and 100+ active US & European angels to deliver 3 perfect matches with tailored warm intros and pitch deck reviews.