Investor · CAMBRIDGE, MA

Gregory Sieczkiewicz

Open Gregory in the network graph →

Filings

24

SEC Form D

Connections

155

co-filers

Capital

$26.3M

across filings

Active

Jun 2019

to May 2023

Most-connected co-filers (155)

Eric Schott · CAMBRIDGE, MA11 shared Neal Bhadkamkar · SANTA CLARA, CA11 shared Matthew Walker · CAMBRIDGE, MA9 shared Sashank Reddy · Baltimore, MD8 shared Amrit Nagpal · Baltimore, MD7 shared Heather Murren · Baltimore, MD7 shared Anula B. Jayasuriya · San Francisco, CA6 shared Gerardo Toledo · CAMBRIDGE, MA6 shared Matthias Turck · New York, NY6 shared Dean Palin · New York, NY5 shared Ron Shah · New York, NY5 shared Charles C. Funk · Vancouver, British Columbia, Canada5 shared John H. Moragne · Rochester, NY3 shared Sharon Daniels · Wellington, Q23 shared Kevin Mckenzie · SAN FRANCISCO, CA3 shared Barbara Kendall · Wellington, Q23 shared Dan Kiley · Wellington, Q23 shared Neil Burnett · Wellington, Q23 shared Thomas Makeig · Wellington, Q23 shared Chris Albinson · SAN FRANCISCO, CA3 shared Octavio Herrera · Los Angeles, CA3 shared Michael Fordyce · SAN FRANCISCO, CA3 shared Brian Locke · Wellington, Q23 shared Paul Mansky · Wellington, Q23 shared

Recent filings (24)

Solarea Bio, Inc.Nov 2025 · 16 co-filers Solarea Bio, Inc.Nov 2025 · 16 co-filers Empirical Long Short Fund, L.P.Sep 2025 · 5 co-filers Empirical Long Short Fund, L.P.Sep 2024 · 5 co-filers Solarea Bio, Inc.Sep 2024 · 18 co-filers Solarea Bio, Inc.Sep 2024 · 18 co-filers 3PH Alliance, Inc.Nov 2023 · 14 co-filers$3.0M Solarea Bio, Inc.May 2023 · 17 co-filers$25.0M Vizsla Silver Corp.Feb 2023 · 23 co-filers$17.4M 3PH Alliance, Inc.Nov 2022 · 16 co-filers$3.0M Vizsla Silver Corp.Nov 2022 · 23 co-filers$13.0M LifeSprout, Inc.Jun 2021 · 16 co-filers$26.2M Lucid Sight, Inc.Jun 2021 · 18 co-filers$2.6M Solarea Bio, Inc.Sep 2020 · 17 co-filers$14.8M IntuitiveX, Inc.May 2020 · 20 co-filers$9.4M LifeSprout, Inc.Apr 2020 · 20 co-filers$28.5M Arria NLG PLCFeb 2020 · 25 co-filers Arria NLG PLCJan 2020 · 26 co-filers$10.1M DYRT, INC.Oct 2019 · 29 co-filers$4.5M IntuitiveX, Inc.Aug 2019 · 13 co-filers$9.4M Arria NLG PLCJun 2019 · 26 co-filers IntuitiveX, Inc.Jun 2019 · 20 co-filers Lucid Sight, Inc.Apr 2019 · 14 co-filers$6.4M DYRT, INC.Jan 2019 · 23 co-filers$4.0M Lucid Sight, Inc.Jan 2019 · 16 co-filers$5.5M

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