Investor · Emeryville, CA

Mason Myers

Open Mason in the network graph →

Filings

11

SEC Form D

Connections

23

co-filers

Capital

$31.9M

across filings

Active

Feb 2010

to Jul 2025

Most-connected co-filers (23)

Judson Barr · New Canaan, CT3 shared N. Greybull Management Services, Llc · Emeryville, CA3 shared N. Greybull Management Services, Llc · Emeryville, CA3 shared Riley Edsall · CORAL GABLES, FL2 shared Alexander Kovriga · Jackson, WY2 shared Jason Zibarras · New York, NY2 shared Randy Stearns · Concord, CA2 shared Adam Stone · Mamaroneck, NY2 shared Kyle S. Poll · Lehi, UT1 shared Ronan S. Carr · Lehi, UT1 shared Angela S. Lafon · Lehi, UT1 shared Colin Woolford · Westport, CT1 shared Mark Pover · Boston, MA1 shared Timothy Schneider · Braintree, MA1 shared Steven D. Rubin · Boca Raton, FL1 shared c/o Greybull Management Greybull Management Services, LLC · Emeryville, CA1 shared James J. Kattan · Grand Cayman, Cayman Islands1 shared Zhiyou Wen · Ames, IA1 shared Jeffrey C. Gordon · New York, NY1 shared Gerard Watts · Vancouver, British Columbia, Canada1 shared Mitchell Jones · San Francisco, CA1 shared Matthew S. Stabler · Lehi, UT1 shared Carr C. Krueger · Lehi, UT1 shared

Recent filings (11)

D. Tools Inc.Jul 2025 · 7 co-filers$12.0M D. Tools Inc.Jul 2025 · 7 co-filers$12.0M Pogo Holdings Inc.Jan 2025 · 15 co-filers Pogo Holdings Inc.Jan 2025 · 15 co-filers VU Custom Inc.Feb 2024 · 8 co-filers$4.2M VU Custom Inc.Feb 2024 · 8 co-filers$4.2M JTB Custom Inc.Apr 2023 · 4 co-filers$250K JTB Custom Inc.Apr 2023 · 4 co-filers$250K D. Tools Inc.Apr 2022 · 5 co-filers$10.0M JTB Custom Inc.Apr 2022 · 4 co-filers$500K D. Tools Inc.Apr 2022 · 5 co-filers$10.0M JTB Custom Inc.Apr 2022 · 4 co-filers$500K Greybull Stewardship, L.P.Jun 2021 · 3 co-filers$50.0M Greybull Stewardship, L.P.Jun 2021 · 3 co-filers$50.0M Greybull Stewardship, L.P.Dec 2019 · 3 co-filers$21.0M Greybull Stewardship, L.P.Dec 2019 · 3 co-filers$21.0M Greybull Stewardship, L.P.Jun 2017 · 4 co-filers$16.0M OnSource, LLCApr 2015 · 5 co-filers$1.5M OnSource, LLCApr 2015 · 5 co-filers$1.5M Greybull Stewardship, L.P.Feb 2010 · 2 co-filers$1.5M Greybull Stewardship, L.P.Feb 2010 · 2 co-filers$1.5M

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