Investor · Denver, CO

William Cossoff

Open William in the network graph →

Filings

21

SEC Form D

Connections

39

co-filers

Capital

$610K

across filings

Active

Dec 2022

to May 2025

Most-connected co-filers (39)

Kevin Gambold · Denver, CO18 shared Edwin Freeborn · Denver, CO17 shared Connie S. Fischer · PASADENA, CA14 shared Michael B. Zelouf · PASADENA, CA14 shared Jan S. Pieterse · PASADENA, CA14 shared Ken Erney · Denver, CO7 shared Elmar Schnee · Glasgow, United Kingdom4 shared Jason Goldsmith · Lutherville, MD4 shared Douglas C. Thomson · Glasgow, United Kingdom4 shared David M. Lawrence · Glasgow, United Kingdom2 shared Alex J. Morgan · Brooklyn, NY2 shared Rahul J. Sharma · Brooklyn, NY2 shared Thomas J. Oxley · Brooklyn, NY2 shared Ari J. Nowacek · Brooklyn, NY2 shared Nicholas J. Opie · Brooklyn, NY2 shared Michael Votruba · Maynard, MA2 shared Peter Unanue · Maynard, MA2 shared Geoff Harris · Maynard, MA2 shared Patrick Herguth · Maynard, MA2 shared Susan B. Barkal · Greer, SC2 shared Virginia R. Summerell · Greensboro, NC2 shared James A. Doti · Pasadena, CA2 shared Timothy K. Mccarthy · Pasadena, CA2 shared David A. Dahl · Pasadena, CA2 shared

Recent filings (21)

Unmanned Experts Inc.Jun 2025 · 7 co-filers$48K Unmanned Experts Inc.Jun 2025 · 7 co-filers$48K Unmanned Experts Inc.May 2025 · 11 co-filers$687K Unmanned Experts Inc.May 2025 · 11 co-filers$687K Western Asset Frontier Markets Fund, Ltd.Apr 2025 · 8 co-filers WESTERN ASSET SHORT-DATED HIGH YIELD PORTFOLIO, LTD.Apr 2025 · 8 co-filers Western Asset Opportunistic Structured Securities Portfolio, Ltd.Apr 2025 · 8 co-filers WESTERN ASSET MANAGED CURRENCY MASTER FUND, LTD.Apr 2025 · 8 co-filers Western Asset Macro Opportunities Alternatives Fund, Ltd.Apr 2025 · 8 co-filers Western Asset Macro Opportunities Alternatives Fund, Ltd.Apr 2024 · 8 co-filers WESTERN ASSET GLOBAL REAL BOND FUND, LTD.Apr 2024 · 8 co-filers Western Asset Sustainable Macro Opportunities, Ltd.Apr 2024 · 8 co-filers Western Asset Frontier Markets Fund, Ltd.Apr 2024 · 8 co-filers WESTERN ASSET SHORT-DATED HIGH YIELD PORTFOLIO, LTD.Apr 2024 · 8 co-filers Western Asset Opportunistic Structured Securities Portfolio, Ltd.Apr 2024 · 8 co-filers WESTERN ASSET MANAGED CURRENCY MASTER FUND, LTD.Apr 2024 · 8 co-filers Western Asset Macro Opportunities Portfolio, Ltd.Apr 2024 · 8 co-filers Western Asset Macro Opportunities Direct Feeder Fund (Offshore), Ltd.Apr 2024 · 8 co-filers Unmanned Experts Inc.Apr 2024 · 11 co-filers$160K Unmanned Experts Inc.Apr 2024 · 11 co-filers$160K Synchron, Inc.Dec 2022 · 17 co-filers$86.0M Synchron, Inc.Dec 2022 · 17 co-filers$86.0M Telemynd, Inc.Dec 2022 · 17 co-filers$6.0M Telemynd, Inc.Dec 2022 · 17 co-filers$6.0M

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