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Thomas Callahan

Syndicate lead · New York, NY

Verified active in the last 12 months

Thomas Callahan is a syndicate lead based in New York, NY focused on AI & ML, Deep Tech, Developer Tools, investing at pre-seed, seed stage. Thomas Callahan has 4 funds and deal vehicles on SEC file, including 4 single-deal SPVs. Estimated typical check: $2.29M–$11.3M. Thomas Callahan has dated investing activity in the last 12 months (latest Sep 2026).

Why Thomas Callahan is listed

Named as the only individual (executive officer) on the Form D for Spartan Fund II, a Series of SecondMarket Growth, LLC, a $11.3M venture SPV (Sep 2026) (4 vehicles on file).

Source: SEC Form D: Spartan Fund II, a Series of SecondMarket Growth, LLC (Sep 18, 2026) · 3 more sources

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Stages
Pre-seed, Seed
Typical check (est.)
$2.29M–$11.3M
Latest fund
SPVs only
Latest dated activity
Sep 2026

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What does Thomas Callahan invest in?

AI & MLDeep TechDeveloper Tools

Funds and deal vehicles Thomas Callahan filed with the SEC

  • Spartan Fund II, a Series of SecondMarket Growth, LLC

    Deal vehicle · $11.3M offering

    Sep 2026

  • Kinetic Fund IV, a Series of SecondMarket Growth, LLC

    Deal vehicle · $2.3M offering

    Sep 2026

  • Frontier Infra Fund VII, a Series of SecondMarket Growth, LLC

    Deal vehicle · $3.03M offering

    Aug 2026

  • AI CNGL Fund IV, a Series of SecondMarket Growth, LLC

    Deal vehicle · $3M offering

    Jun 2026

Sources

Data refreshed from public sources Oct 15, 2026. Is this you? Remove or correct this profile.