Investor · Chestnut Hill, MA
Mark De Souza
Open Mark in the network graph →Filings
68
SEC Form D
Connections
205
co-filers
Capital
$41.1M
across filings
Active
Jan 2017
to Nov 2025
Most-connected co-filers (205)
Jeffrey J. Hattara · Wayzata, MN31 sharedJames L. Mandel · Wayzata, MN31 sharedGary Musil · NEW WESTMINSTER, British Columbia, Canada31 sharedDave Cechota · Cedar Rapids, IA31 sharedDavid W. Batchelor · Wayzata, MN29 sharedBankers American Capital Corporation · Mankato, MN29 sharedDavid C. Carlson · Wayzata, MN29 sharedDonald M. Miller · Wayzata, MN27 sharedGregory Hyde · Marietta, GA27 sharedJim Wheaton · Chapel Hill, NC27 sharedPatrick J. Martucci · NEW YORK, NY26 sharedHarris Associates L.P · Chicago, IL26 sharedTracy Henningsgard · New Rockford, ND26 sharedJohn D. Kiser · Washington, Washington, D.C.24 sharedDonald Hendrickson · New Rockford, ND24 sharedJesko Von Windheim · Durham, NC24 sharedFrancesca R. Cassisi · NEW YORK, NY24 sharedPeter O'Heeron · HOUSTON, TX23 sharedDavid G. Herro · Chicago, IL23 sharedWilliam C. Nygren · Chicago, IL23 sharedAnthony P. Coniaris · Chicago, IL23 sharedJill S. Marcotte · Durham, NC22 sharedAlex Cooley · Seattle, WA22 sharedJonathon F. Dodge · Wayzata, MN21 shared
Recent filings (68)
FPA Apartment Opportunity Trust IXFeb 2026$125KKamal Therapeutics, Inc.Nov 2025 · 5 co-filers$17.3MKamal Therapeutics, Inc.Nov 2025 · 5 co-filers$17.3MOakmark Global Equity L.P.Sep 2025 · 39 co-filersOakmark International Equity L.P.Sep 2025 · 36 co-filersOakmark Global Equity L.P.Sep 2024 · 53 co-filersOakmark International Equity L.P.Sep 2024 · 53 co-filersSONALASENSE, INC.Nov 2023 · 5 co-filers$15.0MOakmark International Equity L.P.Sep 2023 · 47 co-filersOakmark Global Equity L.P.Sep 2023 · 47 co-filersWillow Neuroscience, Inc.Jul 2023 · 5 co-filers$3.3MFlightPath Biosciences, Inc.Feb 2023 · 3 co-filers$8.0MFlightPath Biosciences, Inc.Feb 2023 · 3 co-filers$8.0MPhoenicis Therapeutics, Inc.Oct 2022 · 14 co-filers$10.0MOakmark Global Equity L.P.Sep 2022 · 47 co-filersOakmark International Equity L.P.Sep 2022 · 47 co-filersWillow Neuroscience, Inc.Jan 2022 · 5 co-filers$3.3MSonALAsense, Inc.Jan 2022 · 3 co-filers$30.1MFlightPath Biosciences, Inc.Dec 2021 · 8 co-filers$5.0MPhoenicis Therapeutics, Inc.Aug 2021 · 14 co-filers$10.0MCommunity Capital Technology Inc.Jul 2021 · 20 co-filers$2.6MOakmark International Equity L.P.Jun 2021 · 48 co-filersOakmark Global Equity L.P.Jun 2021 · 48 co-filersCommunity Capital Technology Inc.Mar 2021 · 20 co-filers$2.0MSonALAsense, Inc.Feb 2021 · 3 co-filers$8.0M
Derived from public SEC Form D (Reg D) filings; entities resolved probabilistically. See Mark in the interactive graph →