Investor · PRINCETON, NJ

Sean O'Sullivan

Open Sean in the network graph →

Filings

18

SEC Form D

Connections

66

co-filers

Capital

$194.9M

across filings

Active

Dec 2020

to Oct 2025

Most-connected co-filers (66)

Bradley Larschan · Eads, TN10 shared Dean Nielsen · New York, NY10 shared Brandon Nielson · San Ramon, CA7 shared Brad Allen · Salt Lake City, UT7 shared John Earl · San Ramon, CA7 shared Vilune A. Mackeviciute · Luxembourg, Luxembourg5 shared Yang Yigang · Poulsbo, WA5 shared Godard Abel · Palo Alto, CA5 shared Jordan Axt · Kennett Square, PA5 shared Daniel Bertholet · Poulsbo, WA5 shared Scott Dorsey · Libertyville, IL5 shared Clark Tedford · Poulsbo, WA5 shared Ryan Montecucco · Poulsbo, WA5 shared Scott Bradley · Poulsbo, WA5 shared David Dorwart · Kennett Square, PA5 shared Chad Hayden · Wildwood, MO5 shared Smita Mehta · Scottsdale, AZ5 shared Cindy Croissant · Poulsbo, WA5 shared Jennifer Verma · Scottsdale, AZ5 shared Seema Patel · Scottsdale, AZ5 shared Duane Morrison · Poulsbo, WA5 shared Domenic Fontana · Kennett Square, PA5 shared Sosv Investments LLC · PRINCETON, NJ4 shared Eli Gang · Inglewood, CA3 shared

Recent filings (18)

SOSV IRELAND BIOMANUFACTURING FUND LPOct 2025 · 5 co-filers SOSV HAX GENESIS CONSORTIUM, L.P.Aug 2025 · 5 co-filers LumiThera, Inc.Feb 2025 · 29 co-filers$10.0M LumiThera, Inc.May 2024 · 29 co-filers$5.0M SOSV IRELAND BIOMANUFACTURING FUND LPMar 2024 · 5 co-filers SOSV V INTERNATIONAL, L.P.Aug 2023 · 8 co-filers SOSV V LPAug 2023 · 5 co-filers SOSV INDIEBIO GENESIS CONSORTIUM II, L.P.Jan 2023 · 5 co-filers LumiThera, Inc.Sep 2022 · 33 co-filers$2.0M SOSV V INTERNATIONAL, L.P.Aug 2022 · 8 co-filers SOSV V LPAug 2022 · 5 co-filers SOSV DECARBONIZATION CONSORTIUM, L.P.Nov 2021 · 5 co-filers DECARBONIZATION CONSORTIUM, L.P.Nov 2021 · 5 co-filers LumiThera, Inc.Oct 2021 · 20 co-filers$8.1M Front Street - Wallburg 2, LLCMay 2021 · 15 co-filers$6.8M Front Street - Wallburg 1, LLCDec 2020 · 15 co-filers$8.0M LumiThera, Inc.Dec 2020 · 20 co-filers$3.0M SOSV III LPDec 2015 · 7 co-filers$200.0M SOSV III LPDec 2015 · 7 co-filers$200.0M

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