Investor · New York, NY

Seth Harrison

Open Seth in the network graph →

Filings

97

SEC Form D

Connections

436

co-filers

Capital

$189.7M

across filings

Active

Jun 2009

to Sep 2025

Most-connected co-filers (436)

Jonathan Waldstreicher · Menlo Park, CA28 shared Aaron Kantoff · NEW YORK, NY10 shared David Schnell · Cambridge, MA10 shared Martin Vogelbaum · New York, NY10 shared Stephen A. Eckert · Lexington, MA10 shared Jean C. Nichols · Cambridge, MA10 shared Martin Naley · Cambridge, MA9 shared Alan Colowick · San Diego, CA9 shared Donald J. Hayden · Cambridge, MA8 shared Spiros Liras · New York, NY8 shared Nicholas Vrolijk · Cambridge, MA8 shared Eric J. Newman · Lexington, MA7 shared Richard A. Perle · Lexington, MA7 shared Andrew P. Dunham · Lexington, MA7 shared Alex Newman · Berkeley, CA7 shared Gregory Webb · New York, NY7 shared Yotam Mann · Brooklyn, NY7 shared Eduardo P. Avayu · Lexington, MA7 shared William P. O'Neill · Lexington, MA7 shared Reinhard J. Ambros · Cambridge, MA7 shared Laurel J. Omert · Lexington, MA7 shared Douglas E. Godshall · San Diego, CA7 shared Karunya Lakshmi · New York, NY7 shared Michael Gregoire · New York, NY7 shared

Recent filings (97)

Galvanize Therapeutics, Inc.Sep 2025 · 13 co-filers$141.1M Galvanize Therapeutics, Inc.Sep 2025 · 13 co-filers$141.1M Hemanext Inc.Aug 2025 · 47 co-filers$24.0M Hemanext Inc.Jul 2025 · 47 co-filers$21.7M Hemanext Inc.Jan 2024 · 41 co-filers$10.0M Hemanext Inc.Nov 2023 · 41 co-filers$11.3M Aulos Bioscience, Inc.Aug 2023 · 17 co-filers$20.0M Aulos Bioscience, Inc.Aug 2023 · 17 co-filers$20.0M Hemanext Inc.Feb 2023 · 52 co-filers$15.0M Aethon Therapeutics, Inc.Dec 2022 · 7 co-filers$30.0M Aethon Therapeutics, Inc.Dec 2022 · 7 co-filers$30.0M Galvanize Therapeutics, Inc.Mar 2022 · 8 co-filers$4.0M Galvanize Therapeutics, Inc.Mar 2022 · 8 co-filers$2.0M Marlinspike Therapeutics, Inc.Feb 2022 · 7 co-filers$65.0M Marlinspike Therapeutics, Inc.Feb 2022 · 7 co-filers$65.0M CrossLiner, Inc.Feb 2022 · 10 co-filers$8.0M Deep Apple Therapeutics, Inc.Dec 2021 · 9 co-filers$52.0M Deep Apple Therapeutics, Inc.Dec 2021 · 9 co-filers$52.0M Galaxy Medical, Inc.Nov 2021 · 5 co-filers$750K Red Queen Therapeutics, Inc.Nov 2021 · 7 co-filers$55.0M Red Queen Therapeutics, Inc.Nov 2021 · 7 co-filers$55.0M Hemanext Inc.Oct 2021 · 44 co-filers$59.5M Galaxy Medical, Inc.Oct 2021 · 5 co-filers$1.3M CrossLiner, Inc.Sep 2021 · 8 co-filers$800K Evercrisp Biosciences, Inc.Aug 2021 · 7 co-filers$75.0M

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