Investor · New York, NY

Mark B. Fitzsimmons

Open Mark in the network graph →

Filings

127

SEC Form D

Connections

166

co-filers

Capital

$11.1B

across filings

Active

Jan 2018

to Mar 2025

Most-connected co-filers (166)

Steven M. Felsenthal · New York, NY121 shared Grant N. Smith · New York, NY120 shared Gregg R. Buckbinder · New York, NY117 shared Barry A. Goodman · New York, NY115 shared Harvey M. Beker · New York, NY113 shared Millburn Ridgefield Corporation · Greenwich, CT98 shared Millburn Ridgefield Corporation · Greenwich, CT94 shared George E. Crapple · Greenwich, CT66 shared Hayley J. De Witt · Vancouver, British Columbia, Canada47 shared Michael G. Allen · Vancouver, British Columbia, Canada47 shared Jeffrey Hebel · Toronto, Ontario, Canada47 shared Jeffrey Cole · Toronto, Ontario, Canada47 shared Alan Gardner · Boston, MA47 shared Douglas P. Hurst · Vancouver, British Columbia, Canada47 shared Jeffrey J. Sundar · Vancouver, British Columbia, Canada47 shared Ilon R. Wu · New York, NY47 shared Eric Scharaga · DOVER, DE47 shared Eduardo Michelsen Delgado · Bogota, Mauritius47 shared Jay Mcgrath · Boston, MA47 shared Marcel De Groot · VANCOUVER, British Columbia, Canada47 shared Darryl S. Cardey · VANCOUVER, British Columbia, Canada47 shared J. Dennis D. Hunter · Grand Cayman, Cayman Islands41 shared Robert Howard · San Francisco, CA41 shared George Reed · Hopkins, SC41 shared

Recent filings (127)

MetaVia Inc.May 2025 · 23 co-filers$10.0M APOLLO FUNDMar 2025 · 26 co-filers Millburn MCo Partners L.P.Mar 2025 · 26 co-filers Millburn Select Strategies L.P.Mar 2025 · 26 co-filers Millburn Resource Opportunities Fund L.P.Mar 2025 · 26 co-filers Millburn Commodity Fund L.P.Mar 2025 · 26 co-filers Millburn Equity Partners LLCMar 2025 · 26 co-filers Millburn Multi-Markets Fund L.P.Mar 2025 · 26 co-filers Millburn Select Strategies L.P.Mar 2025 · 26 co-filers Millburn Equity Partners LLCMar 2025 · 26 co-filers Millburn Resource Opportunities Fund Ltd.Mar 2025 · 32 co-filers Millburn Commodity Fund L.P.Mar 2025 · 26 co-filers APOLLO FUNDMar 2025 · 26 co-filers NESTOR PARTNERSMar 2025 · 26 co-filers Millburn MCo Partners L.P.Mar 2025 · 26 co-filers NESTOR PARTNERSMar 2025 · 26 co-filers Millburn Multi-Markets Trading L.P.Mar 2025 · 25 co-filers Millburn Multi-Markets Trading L.P.Mar 2025 · 25 co-filers Millburn Multi-Markets Fund L.P.Mar 2025 · 26 co-filers Millburn Resource Opportunities Fund Ltd.Mar 2025 · 32 co-filers Millburn Resource Opportunities Fund L.P.Mar 2025 · 26 co-filers Millburn Resource Opportunities Fund L.P.Mar 2025 · 26 co-filers Millburn Resource Opportunities Fund L.P.Mar 2025 · 26 co-filers Millburn Equity Partners LLCJan 2025 · 25 co-filers NeuroBo Pharmaceuticals, Inc.Jul 2024 · 23 co-filers$17.0M

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