Brian Rathjen
Syndicate lead · Stamford, CT
Brian Rathjen is a syndicate lead based in Stamford, CT, investing at pre-seed, seed stage. Brian Rathjen has 7 funds and deal vehicles on SEC file, including 7 single-deal SPVs. Estimated typical check: $2.83M–$5.32M. Brian Rathjen's latest dated investing activity was in Mar 2025.
Why Brian Rathjen is listed
Named as the only individual (executive officer) on the Form D for KAM TD SPV LLC, a $6M venture SPV (Mar 2025) (7 vehicles on file).
Source: SEC Form D: KAM TD SPV LLC (Mar 28, 2025) · 6 more sources
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- Stages
- Pre-seed, Seed
- Typical check (est.)
- $2.83M–$5.32M
- Latest fund
- SPVs only
- Latest dated activity
- Mar 2025
Is Brian Rathjen a fit for you?
See your fit score and the reason, contact details, and any warm path from your network.
What does Brian Rathjen invest in?
Sector focus not yet verifiedFunds and deal vehicles Brian Rathjen filed with the SEC
- Mar 2025
KAM TD SPV LLC
Deal vehicle · $6M offering
- Mar 2025
KAM CW SPV LLC
Deal vehicle · $3M offering
- Mar 2025
KAM Rockville SPV LLC
Deal vehicle · $3.5M offering
- Mar 2025
KAM GROC SPV LLC
Deal vehicle · $5.7M offering
- Mar 2025
KAM Annapolis SPV LLC
Deal vehicle · $4.5M offering
- Mar 2025
KAM SKR SPV LLC
Deal vehicle · $3.5M offering
- Mar 2025
KAM 1RT SPV LLC
Deal vehicle · $1.6M offering
Sources
- SEC Form D: KAM TD SPV LLCMar 28, 2025
- SEC Form D: KAM CW SPV LLCMar 28, 2025
- SEC Form D: KAM Rockville SPV LLCMar 28, 2025
- SEC Form D: KAM GROC SPV LLCMar 27, 2025
- SEC Form D: KAM Annapolis SPV LLCMar 27, 2025
- SEC Form D: KAM SKR SPV LLCMar 27, 2025
- SEC Form D: KAM 1RT SPV LLCMar 27, 2025
Data refreshed from public sources Oct 15, 2026. Is this you? Remove or correct this profile.