Investor · Grand Cayman, Cayman Islands

Mark O'Sullivan

Open Mark in the network graph →

Filings

2

SEC Form D

Connections

28

co-filers

Capital

$300.0M

across filings

Active

Nov 2010

to Aug 2025

Most-connected co-filers (28)

Patrick G. Sakala · Grand Cayman, Cayman Islands1 shared Benoit G. Sansoucy · Grand Cayman, Cayman Islands1 shared Martin Steyn · New York, NY1 shared Sandeep Arora · New York, NY1 shared Shea Wallon · Chicago, IL1 shared David Turner · Orlando, FL1 shared Michael Harrison · Canonsburg, PA1 shared Andrew Challis · Norwell, MA1 shared Matthew Burkley · New York, NY1 shared Joan Lavis · NEW YORK, NY1 shared Simon Wilson · Irvine, CA1 shared Scott D. Zucker · New York, NY1 shared Nicholas Brophy · New York, NY1 shared Paolo Croce · New York, NY1 shared Richard Volpe · New York, NY1 shared Michele Faissola · New York, NY1 shared Stephen Wolff · New York, NY1 shared Thomas Mosimann · New York, NY1 shared Dexter Senft · New York, NY1 shared Simon Maisey · New York, NY1 shared Kemal Askar · New York, NY1 shared Colin J. Corgan · New York, NY1 shared Bradford S. Levy · New York, NY1 shared Mark Redwood · New York, NY1 shared

Recent filings (2)

Blue Owl GP Finance (U) Offshore Investors LPAug 2025 · 7 co-filers Blue Owl GP Finance (U) Offshore Investors LPAug 2025 · 7 co-filers TradeWeb Markets LLCNov 2010 · 35 co-filers$610.5M TradeWeb Markets LLCNov 2010 · 35 co-filers$610.5M

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