Investor · New York, NY

Mark O'Sullivan

Open Mark in the network graph →

Filings

12

SEC Form D

Connections

5

co-filers

Capital

$737.8M

across filings

Active

Mar 2023

to Dec 2025

Most-connected co-filers (5)

Sekhar Puli · Frisco, TX12 shared Jennifer Brouse · New York, NY12 shared Jamie Lurie · New York, NY12 shared Todd M. Gooding · Portland, OR10 shared G. Haslett · New York, NY2 shared

Recent filings (12)

Blue Owl GP Stakes Stargate (A) LPDec 2025 · 3 co-filers Blue Owl GP Stakes Stargate (B) LPDec 2025 · 3 co-filers Blue Owl GP Stakes Stargate (A) LPDec 2024 · 5 co-filers Blue Owl GP Stakes Stargate (B) LPDec 2024 · 5 co-filers Blue Owl GP Stakes Pilot LPSep 2024 · 4 co-filers Blue Owl GP Stakes Stargate (B) LPDec 2023 · 4 co-filers Blue Owl GP Stakes Stargate Cayman (B) LPDec 2023 · 4 co-filers Blue Owl GP Stakes Stargate U.S. II (A) LLCDec 2023 · 4 co-filers Blue Owl GP Stakes Stargate (A) LPDec 2023 · 4 co-filers Blue Owl GP Stakes Mirror Aggregator (C) LPAug 2023 · 4 co-filers Dyal Capital Partners V Co-Invest GF (A) LPMar 2023 · 4 co-filers Dyal Capital Partners V Co-Invest GF (B) LPMar 2023 · 4 co-filers

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