Mark Longenecker
Solo GP · Chicago, Illinois
Named as the only individual (Manager of the General Partner of the Issuer) on the Form D for Tonic Ventures FUND II, LP, a $20M venture fund (Feb 2026) (5 vehicles on file: 2 funds, 3 SPVs).
Angel Investment Confidence Score
Algorithmic score indicating recent deal velocity, check size reliability, and investment conviction in early-stage startups.
Why Mark Longenecker holds a 86/100 confidence score
- Verified active check-writing activity within the last 12 months
- Target check sizes calibrated between $200K–$600K
- Cross-sector early stage track record
- Named as the only individual (Manager of the General Partner of the Issuer) on the Form D for Tonic Ventures FUND II, LP, a $20M venture fund (Feb 2026) (5 vehicles on file: 2 funds, 3 SPVs).
Building in Technology & Software? See how well your pitch deck matches Mark Longenecker’s thesis.
Check My Startup FitVerified investment track record
Named as the only individual (Manager of the General Partner of the Issuer) on the Form D for Tonic Ventures FUND II, LP, a $20M venture fund (Feb 2026) (5 vehicles on file: 2 funds, 3 SPVs).
Source: SEC Form D: Tonic Ventures FUND II, LP (Feb 23, 2026) · 4 more sources
- Stages
- Pre-seed, Seed
- Typical check (est.)
- $200K–$600K
- Verified deals
- 3 on file
- Latest activity
- Feb 2026
Is Mark Longenecker a fit for you?
See your AI startup fit score, verified contact channels, and warm paths through your network.
What sectors does Mark Longenecker back?
Sector focus not yet verifiedVerified 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: Tonic Ventures FUND II, LPFeb 23, 2026
- SEC Form D: GM Seed SPV, a series of Tonic-Barrel, LPAug 12, 2025
- SEC Form D: Tonic Ventures Fund I, LPJul 8, 2025
- SEC Form D: Perfectly Dosed Fund I, a Series of Tonic-Barrel, LPMay 16, 2025
- SEC Form D: OL-1113 Fund I, a series of Tonic-Barrel, LPMar 28, 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 Mark Longenecker
Founders raising in early stage tech also reach out to these verified check-writers with similar portfolio focus and check sizes.
Individual angel · Paris, France
Solo GP · London, United Kingdom
Syndicate lead · US & Europe
Individual angel · London, United Kingdom
Individual angel · Stockholm, Sweden
Individual angel · Stockholm, Sweden
Raising pre-seed or seed for your startup?
Don’t pitch blindly. Our AI engine evaluates your startup against Mark Longenecker and 100+ active US & European angels to deliver 3 perfect matches with tailored warm intros and pitch deck reviews.