Investor · Waltham, MA

William Heiden

Open William in the network graph →

Filings

13

SEC Form D

Connections

68

co-filers

Capital

$177.9M

across filings

Active

Mar 2020

to Mar 2025

Most-connected co-filers (68)

Elizabeth Holmberg · Waltham, MA6 shared Kurt Brendlinger · Venice, CA6 shared Basil Athenson · Waltham, MA6 shared Robert J. Slingerland · Las Vegas, NV6 shared Jeffrey S. Mccormick · Waltham, MA6 shared Werner Cautreels · Waltham, MA6 shared Jan Brouwer · Rotterdam, P76 shared Hgi Kf95 Managing Co., LLC · NORFOLK, VA6 shared Zachary M. Sievers · Batavia, IL6 shared Emily Ladd-Kravitz · Waltham, MA6 shared Louis Paleta · Westlake, TX6 shared Courtney Leimkuhler · New York, NY6 shared Brandon J. Kanitz · Grand Rapids, MI6 shared Christine Currie · Dublin, OH5 shared Felix Y. Lu · Doylestown, PA5 shared Aaron Y. Lu · Doylestown, PA5 shared Graham R. Bird · Winnipeg, Manitoba, Canada5 shared Glenn Rockman · NEW YORK, NY5 shared Brandon Nielson · San Ramon, CA5 shared Garry J. Macnicholas · Winnipeg, Manitoba, Canada5 shared Alan H. Kelly · George Town, Cayman Islands5 shared Balaji J. Swaminathan · Dublin, OH5 shared Xuanyong Lu, Phd · Doylestown, PA4 shared L. B. Teague · Atlanta, GA4 shared

Recent filings (13)

THIRD POLE, INC.Mar 2025 · 24 co-filers$30.0M THIRD POLE, INC.Mar 2024 · 23 co-filers$10.0M THIRD POLE, INC.Feb 2024 · 23 co-filers ImCare Biotech, Inc.Jul 2023 · 12 co-filers$153K THIRD POLE, INC.Feb 2023 · 25 co-filers ImCare Biotech, LLCApr 2022 · 8 co-filers$368K THIRD POLE, INC.Feb 2022 · 17 co-filers Westrock Coffee Holdings, LLCDec 2021 · 28 co-filers$17.0M ImCare Biotech, LLCJul 2021 · 8 co-filers$1.3M imCare Biotech, LLCMay 2021 · 8 co-filers$1.8M THIRD POLE, INC.Feb 2021 · 19 co-filers Westrock Coffee Holdings, LLCMar 2020 · 24 co-filers$561.7M imCare Biotech, LLCMar 2020 · 9 co-filers$680K

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