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Mason Cook

Solo GP · Beloit, WI

Verified active in the last 12 months

Mason Cook is a solo GP based in Beloit, WI, investing at pre-seed, seed stage. Mason Cook's most recent fund with a disclosed size, Mastercraft Ventures Fund I, LP, filed a $11.5M offering with the SEC in Dec 2025. Estimated typical check: $125K–$350K. Mason Cook has dated investing activity in the last 12 months (latest Dec 2025).

Why Mason Cook is listed

Named as the only individual (executive officer/promoter) on the Form D for Mastercraft Ventures Fund I, LP, a $11.5M venture fund (Dec 2025).

Source: SEC Form D: Mastercraft Ventures Fund I, LP (Dec 8, 2025)

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Stages
Pre-seed, Seed
Typical check (est.)
$125K–$350K
Latest fund
$11.5M · Dec 2025
Latest dated activity
Dec 2025

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What does Mason Cook invest in?

Sector focus not yet verified

What has Mason Cook invested in recently?

  • Mastercraft Ventures Fund I, LP

    Invested through a fund

    Jan 2025

Funds and deal vehicles Mason Cook filed with the SEC

  • Mastercraft Ventures Fund I, LP

    Fund · $11.5M offering

    Dec 2025

Sources

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