Investor · Boston, MA

Martin Madaus

Open Martin in the network graph →

Filings

36

SEC Form D

Connections

172

co-filers

Capital

$31.3M

across filings

Active

Feb 2023

to Jul 2025

Most-connected co-filers (172)

David Walt · Cambridge, MA9 shared Franklin Witney · Boston, MA9 shared Keith L. Crandell · Chicago, IL9 shared Andrei G. Santos · Vancouver, British Columbia, Canada7 shared Robert E. Gee · Tulsa, OK7 shared Xiao Ping N. Xu · Grand Cayman, Cayman Islands7 shared Kevin J. Smith · Alpharetta, GA7 shared Christopher Gagliardi · Saratoga, CA7 shared Ravi Srinivasan · Dallas, TX7 shared Kevin Hrusovsky · Boston, MA6 shared Paul Meister · Lexington, MA6 shared John R. Slump · Chicago, IL6 shared Jake Hansen · Draper, UT6 shared John H. Zhao · Beijing, Israel6 shared Daniel D. Levner · Boston, MA6 shared Brian E. Rooder · Greenwich, CT5 shared Douglas Cole · Lexington, MA5 shared Dennis Sandstedt · Lexington, MA5 shared Matthew A. Lindenbaum · NEW YORK, NY4 shared R. P. Reiter, Jr · NEW CANAAN, CT4 shared Paul P. Schilpp · NEW CANAAN, CT4 shared James A. Parsons · New Canaan, CT4 shared Herbert M. Rouse · Kinston, NC4 shared Cao H. Yonggang · Beijing, Israel4 shared

Recent filings (36)

US Core Farmland Fund LPFeb 2026 · 6 co-filers SYNTIS BIO, INC.Jul 2025 · 18 co-filers$26.5M SYNTIS BIO, INC.Jul 2025 · 18 co-filers$26.5M Voyager One Offshore LtdJun 2025 · 12 co-filers US Core Farmland Fund LPFeb 2025 · 19 co-filers Voyager One Offshore LtdFeb 2025 · 13 co-filers SYNTIS BIO, INC.Jan 2025 · 14 co-filers$9.0M SYNTIS BIO, INC.Jan 2025 · 14 co-filers$9.0M Voyager One Offshore LtdFeb 2024 · 13 co-filers Evari, Inc.Feb 2024 · 5 co-filers$7.6M Voyager One Offshore LtdFeb 2023 · 12 co-filers Micro Turbo Technologies, Inc.Feb 2023 · 5 co-filers$7.7M SYNTIS BIO, INC.Jan 2023 · 12 co-filers$15.4M SYNTIS BIO, INC.Jan 2023 · 12 co-filers$15.4M RFE Investment Partners IX, L.P.May 2022 · 21 co-filers Emulate, Inc.Sep 2021 · 29 co-filers$57.5M Emulate, Inc.Mar 2020 · 31 co-filers$20.0M RFE Investment Partners IX, L.P.Feb 2020 · 24 co-filers RFE IX Parallel, L.P.Feb 2020 · 24 co-filers ALPHA UMI INCNov 2019 · 8 co-filers$675K Quanterix CorpJul 2019 · 9 co-filers$6.5M ALPHA UMI INCDec 2018 · 8 co-filers RFE IX Parallel, L.P.Dec 2018 · 24 co-filers Impact Ventures III, L.P.Sep 2017 · 4 co-filers Quanterix CorpJun 2017 · 27 co-filers$8.5M

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