Investor · Beloit, WI

Mason Cook

Open Mason in the network graph →

Filings

12

SEC Form D

Connections

49

co-filers

Capital

$20.1M

across filings

Active

Feb 2023

to Feb 2026

Most-connected co-filers (49)

Zvi Ben David · Caesarea Industrial Park, L35 shared Erez Raphael · Caesarea Industrial Park, L35 shared Adam Stern · New York, NY5 shared Yoav Shaked · CAESAREA INDUSTRIAL PARK, L35 shared Peter J. Coman · Wellington, Q24 shared System 2 Capital Gp Limited · Grand Cayman, Cayman Islands4 shared Glenn Solomon · San Francisco, CA3 shared Gorkem Yurtseven · San Francisco, CA3 shared System 2 Capital Gp Limited · Grand Cayman, Cayman Islands3 shared Jennifer Li · San Francisco, CA3 shared Gene R. Janvier · BOSTON, MA3 shared Cary M. Marr · Grand Cayman, Cayman Islands3 shared Max Veneziani · London, United Kingdom3 shared John R. Slump · Chicago, IL3 shared Michael G. Pugatch · Boston, MA3 shared Glenn Kennedy · Grand Cayman, Cayman Islands3 shared Burkay Gur · San Francisco, CA3 shared Steve Jang · San Francisco, CA3 shared Joseph Greving · West Des Moines, IA3 shared System 2 Capital Gp Limited · Grand Cayman, Cayman Islands3 shared Andy Fletcher · Austin, TX2 shared Annmarie Brennan · Austin, TX2 shared Shaughn Simmons · Austin, TX2 shared Jared Doskow · Austin, TX2 shared

Recent filings (12)

System 2 Domestic Fund LPFeb 2026 · 3 co-filers fal - Features & Labels, Inc.Dec 2025 · 17 co-filers$140.5M Mastercraft Ventures Fund I, LPDec 2025 · 2 co-filers$11.5M Mastercraft Ventures Fund I, LPDec 2025 · 2 co-filers$11.5M fal - Features & Labels, Inc.Aug 2025 · 17 co-filers$125.0M Mastercraft Ventures Fund I, LPJul 2025 · 2 co-filers$10.0M Mastercraft Ventures Fund I, LPJul 2025 · 2 co-filers$10.0M fal - Features & Labels, Inc.Feb 2025 · 14 co-filers$48.8M System 2 Domestic Fund LPFeb 2025 · 11 co-filers Mastercraft Ventures Fund I, LPJan 2025 · 2 co-filers$10.0M Mastercraft Ventures Fund I, LPJan 2025 · 2 co-filers$10.0M System 2 Domestic Fund LPFeb 2024 · 11 co-filers Overhaul Group, Inc.Sep 2023 · 29 co-filers$50.0M System 2 Domestic Fund LPFeb 2023 · 11 co-filers Overhaul Group, Inc.Feb 2023 · 29 co-filers$40.0M

Derived from public SEC Form D (Reg D) filings; entities resolved probabilistically. See Mason in the interactive graph →