Investor · New York, NY

Jonathan Mariner

Open Jonathan in the network graph →

Filings

3

SEC Form D

Connections

36

co-filers

Capital

$22.0M

across filings

Active

Oct 2020

to Dec 2025

Most-connected co-filers (36)

Robert L. Powers · St. Louis, MO1 shared Laurence D. Berg · New York, NY1 shared Mark Cuban · New York, NY1 shared Antoine J. Munfakh · New York, NY1 shared Lloyd G. Waterhouse · New York, NY1 shared Rashaun Williams · New York, NY1 shared Itai Wallach · New York, NY1 shared Harbinger Alternative Associates, Llc · Atlanta, GA1 shared Harbinger Sports Associates, Llc · Atlanta, GA1 shared Michael S. Burkland · ROCHESTER, MI1 shared Dave S. Kasabian · ROCHESTER, MI1 shared Bill S. Koefoed · ROCHESTER, MI1 shared Kara S. Wilson · ROCHESTER, MI1 shared Jeff S. Degrieck · ROCHESTER, MI1 shared John S. Kinzer · ROCHESTER, MI1 shared Bradley S. Brown · ROCHESTER, MI1 shared David S. Petraeus · ROCHESTER, MI1 shared David S. Welsh · ROCHESTER, MI1 shared Mark S. Angle · ROCHESTER, MI1 shared Craig Colby · ROCHESTER, MI1 shared Mark G. Wolsey-Paige · New York, NY1 shared Simon G. Allen · New York, NY1 shared Garet G. Guthrie · New York, NY1 shared Chase G. Ashley · New York, NY1 shared

Recent filings (3)

Harbinger Sports Partners Fund I, LPDec 2025 · 15 co-filers Harbinger Sports Partners Fund I, LPDec 2025 · 15 co-filers ONESTREAM SOFTWARE LLCApr 2021 · 27 co-filers$200.0M ONESTREAM SOFTWARE LLCApr 2021 · 27 co-filers$200.0M McGraw-Hill Education, Inc.Oct 2020 · 25 co-filers$22.0M McGraw-Hill Education, Inc.Oct 2020 · 25 co-filers$22.0M

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