Investor · Grand Rapids, MI

Charles Decoster Iv

Open Charles in the network graph →

Filings

13

SEC Form D

Connections

68

co-filers

Capital

$1.2M

across filings

Active

Jul 2022

to Sep 2025

Most-connected co-filers (68)

Bryan Graf · Mercer Island, WA10 shared Evan Kelso · Grand Rapids, MI9 shared Robot Ventures GP IV, LLC · Beaverton, OR6 shared Thomas Gunnison · Mercer Island, WA6 shared Tarun Chitra · Brooklyn, NY6 shared Randall T. Sallee · Lee's Summit, MO6 shared Robert Leshner · San Francisco, CA5 shared Robert Kuzniacki · Washington Crossing, PA5 shared Kevin Roseke · TORONTO, Ontario, Canada4 shared Robert Mah · RENO, NV4 shared Christopher Lee · TORONTO, Ontario, Canada4 shared Gerard Michel · New York, NY3 shared Ian A. Pilgrim · Hamilton, Bermuda3 shared Gilad Aharon · New York, NY3 shared Steven G. Salamon · New York, NY3 shared John W. Scandurra · St. Paul, MN3 shared Johnny G. John · New York, NY3 shared Alan Collier · Woodland Hills, CA3 shared Kevin G. Muir · New York, NY3 shared Bruce A. Youngman · VANCOUVER, British Columbia, Canada3 shared John G. Purpura · New York, NY3 shared George W. Fazio · St. Paul, MN3 shared David G. Hoffman · New York, NY3 shared Wade H. Kenny · Grand Cayman, Cayman Islands3 shared

Recent filings (13)

Haddon Rig Med-Tech Fund, LLCSep 2025 · 5 co-filers$50.0M Haddon Rig Med-Tech Fund, LLCSep 2025 · 5 co-filers$50.0M Aria CV, Inc.Aug 2025 · 24 co-filers$6.0M GUARDIAN SMART INFRASTRUCTURE PARTNERS-A LPJun 2025 · 8 co-filers GUARDIAN SMART INFRASTRUCTURE PARTNERS LPJun 2025 · 8 co-filers Aria CV, Inc.Sep 2024 · 34 co-filers$20.0M GUARDIAN SMART INFRASTRUCTURE PARTNERS-A LPJun 2024 · 8 co-filers$800.0M GUARDIAN SMART INFRASTRUCTURE PARTNERS LPJun 2024 · 8 co-filers$800.0M Haddon Rig Med-Tech Fund, LLCMay 2024 · 5 co-filers$50.0M Haddon Rig Med-Tech Fund, LLCMay 2024 · 5 co-filers$50.0M DELCATH SYSTEMS, INC.Mar 2023 · 32 co-filers$25.0M Xenocor, Inc.Mar 2023 · 13 co-filers$10.0M Xenocor, Inc.Mar 2023 · 13 co-filers$10.0M DELCATH SYSTEMS, INC.Dec 2022 · 32 co-filers$3.8M DELCATH SYSTEMS, INC.Jul 2022 · 32 co-filers$5.0M Aria CV, Inc.Jul 2022 · 27 co-filers$13.0M

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