Investor · Montreal, Quebec, Canada

Joseph Zakrzewski

Open Joseph in the network graph →

Filings

53

SEC Form D

Connections

304

co-filers

Capital

$27.3M

across filings

Active

Feb 2011

to Mar 2018

Most-connected co-filers (304)

Hans-Jurgen S. Woerle · Denver, CO8 shared Raymond J. Hage · Memphis, TN8 shared Alex Barkas · Palo Alto, CA8 shared Colin Goddard · Newtown Square, PA7 shared Stephen L. Bandak · Memphis, TN7 shared Michael N. Turro · Evanston, IL6 shared Sally Seebode · New York, NY6 shared Jeffrey P. Courtney · WILMINGTON, DE6 shared Samuel T. Henderson · Denver, CO6 shared Brian Macdonald · West Conshohocken, PA6 shared Robert L. Steininger · CAMBRIDGE, MA5 shared Terrance G. Mcguire · CAMBRIDGE, MA5 shared Kevin Mclaughlin · Newton, MA5 shared Farah Champsi · San Carlos, CA5 shared Rick Rubin · Berkeley, CA5 shared Amir Nashat · San Diego, CA5 shared James W. Broderick · Waltham, MA5 shared Paul Goldenheim · Allston, MA5 shared Steven L. Ertel · CAMBRIDGE, MA5 shared Harold R. Werner · Malvern, PA5 shared Gary D. Dean · Pasadena, CA4 shared Jackie B. Clem · Pasadena, CA4 shared Bruce J. Richards · New York, NY4 shared Jonathan M. Harris · New York, NY4 shared

Recent filings (53)

AN2 Therapeutics, Inc.Mar 2026 · 11 co-filers$40.0M Earlyworks Co., Ltd.Nov 2025 · 27 co-filers$2.0M Earlyworks Co., Ltd.Oct 2025 · 25 co-filers$3.5M Atsena Therapeutics, Inc.Apr 2025 · 17 co-filers$150.0M Atsena Therapeutics, Inc.Apr 2025 · 17 co-filers$150.0M U.S. Cities Multifamily Fund LPMar 2023 · 18 co-filers U.S. Cities Multifamily Fund LPFeb 2022 · 18 co-filers Cerecin Inc.Sep 2021 · 26 co-filers$30.0M Cyteir Therapeutics, Inc.Feb 2021 · 25 co-filers Cyteir Therapeutics, Inc.Feb 2021 · 25 co-filers U.S. Cities Multifamily Fund LPFeb 2021 · 18 co-filers Cerecin Inc.Feb 2021 · 23 co-filers$15.0M D2G Oncology, Inc.Apr 2020 · 10 co-filers$8.7M D2G Oncology, Inc.Feb 2020 · 10 co-filers$7.3M U.S. Cities Multifamily Fund LPFeb 2020 · 18 co-filers Macrolide Pharmaceuticals, Inc.Mar 2018 · 19 co-filers$20.0M Macrolide Pharmaceuticals, Inc.Mar 2018 · 19 co-filers$20.0M GrowthX Fund II, L.P.Jun 2017 · 9 co-filers$15.0M Hapten Sciences, Inc.Feb 2017 · 13 co-filers$1.2M SiteOne Therapeutics, Inc.Feb 2017 · 13 co-filers$15.1M SiteOne Therapeutics, Inc.Feb 2017 · 13 co-filers$15.1M Hapten Sciences, Inc.Jan 2016 · 13 co-filers$1.7M Hapten Sciences, Inc.Sep 2015 · 13 co-filers$225K SiteOne Therapeutics, Inc.Jul 2015 · 13 co-filers$1.3M SiteOne Therapeutics, Inc.Jul 2015 · 13 co-filers$1.3M

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