Arthur Reynolds Karell
Solo GP · Hobe Sound, Florida
Named as the only individual (ISSUER'S MANAGING MEMBER.) on the Form D for First in SCATR 2024 LLC, a $6.6M venture fund (Sep 2026) (9 vehicles on file: 8 funds, 1 SPV). 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 Arthur Reynolds Karell holds a 96/100 confidence score
- Verified active check-writing activity within the last 12 months
- Target check sizes calibrated between $525K–$1.55M
- Clear domain thesis in B2B Software, Defense & Aerospace
- Named as the only individual (ISSUER'S MANAGING MEMBER.) on the Form D for First in SCATR 2024 LLC, a $6.6M venture fund (Sep 2026) (9 vehicles on file: 8 funds, 1 SPV). Also a non-executive director at 1 startup that filed Form D.
Building in B2B Software, Defense & Aerospace? See how well your pitch deck matches Arthur Reynolds Karell’s thesis.
Check My Startup FitVerified investment track record
Named as the only individual (ISSUER'S MANAGING MEMBER.) on the Form D for First in SCATR 2024 LLC, a $6.6M venture fund (Sep 2026) (9 vehicles on file: 8 funds, 1 SPV). Also a non-executive director at 1 startup that filed Form D.
Source: SEC Form D: First In Ventures Fund II LP (Sep 17, 2026) · 8 more sources
- Stages
- Pre-seed to Series A
- Typical check (est.)
- $525K–$1.55M
- Verified deals
- 9 on file
- Latest activity
- Sep 2026
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What sectors does Arthur Reynolds Karell back?
B2B SoftwareDefense & AerospaceVerified investments & deal activity
9 deals trackedRecent startup investments, syndicate rounds, and public co-investments across the US and Europe.
- Sep 2026
First In Ventures Fund II LP
Invested through a fund
- Sep 2026
First in SCATR 2024 LLC
Invested through a fund
- Sep 2026
First In Patriot Smack LLC
Invested through a fund
- Sep 2026
First In Patriot Castelion LLC
Invested through a fund
- Sep 2026
First In Patriot Antithesis LLC
Invested through a fund
- Sep 2026
First In Liberty Castelion LLC
Invested through a fund
- Sep 2026
First in Castelion B 2024 LLC
Invested through a fund
- Mar 2026
Vanguard Defense
Board seat on the company's SEC filing · CA
- Oct 2025
First In Ventures Fund 3 SBIC Critical Technologies LP
Invested through a fund
Public Verification Sources
- SEC Form D: First In Ventures Fund II LPSep 17, 2026
- SEC Form D: First in SCATR 2024 LLCSep 17, 2026
- SEC Form D: First In Patriot Smack LLCSep 17, 2026
- SEC Form D: First In Patriot Castelion LLCSep 17, 2026
- SEC Form D: First In Patriot Antithesis LLCSep 17, 2026
- SEC Form D: First In Liberty Castelion LLCSep 17, 2026
- SEC Form D: First in Castelion B 2024 LLCSep 17, 2026
- SEC Form D: First in Castelion 2024 LLCSep 17, 2026
- SEC Form D (board seat): Vanguard DefenseMar 10, 2026
Data refreshed from SEC filings and public European announcements Oct 15, 2026. Is this you? Correct or remove this profile.
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