Investor · New York, NY

Brian Steiner

Open Brian in the network graph →

Filings

57

SEC Form D

Connections

72

co-filers

Capital

$610.1M

across filings

Active

Jan 2023

to Jan 2026

Most-connected co-filers (72)

Adam Glick · New York, NY50 shared Richard Holstrom · PALO ALTO, CA39 shared Kenneth Wong · PALO ALTO, CA38 shared Shulamit P. Leviant · New York, NY6 shared Edward Martinson · New York, NY6 shared Maxim Capital Group, Llc · New York, NY4 shared David J. Walker · New York, NY4 shared Philmore Anderson Iv · New York, NY4 shared Maxim Capital Group, Llc · New York, NY4 shared Leo M. Bullock, Iv · Panama City Beach, FL4 shared Maxim Capital Group, Llc · New York, NY4 shared Maxim Capital Partners, Llc · New York, NY4 shared Maxim Capital Partners, Llc · New York, NY4 shared Philmore Anderson Iii · Watertown, MA4 shared Bradley Rymer · Bonita Springs, FL3 shared Thomas Miller · San Jose, CA3 shared Jeffrey N. Sherman · Phoenix, AZ3 shared Jinpyung Yoo · BOCA RATON, FL3 shared Carl Farrell · Encino, Los Angeles, CA2 shared Aziz Rahimtoola · ENCINO, LOS ANGELES, CA2 shared Morgan P. Blackwell · New York, NY2 shared Keith Katkin · Irvine, CA2 shared Gabriel T. Schwartz · New York, NY2 shared Mark Affolter · Chicago, IL2 shared

Recent filings (57)

Haven Fund II LLCJan 2026 · 1 co-filer$50.0M MIOF HO, L.P.Dec 2025 · 13 co-filers MIOF HO, L.P.Dec 2025 · 13 co-filers MIOF SP 4 LPMay 2025 · 13 co-filers MIOF SP 4 LPMay 2025 · 13 co-filers MIOF IV Feeder, L.P.May 2025 · 10 co-filers MIOF IV Feeder, L.P.May 2025 · 10 co-filers Sabio Holdings Inc.Apr 2025 · 35 co-filers$103K Maxim Income Opportunity Fund IV, L.P.Jan 2025 · 13 co-filers Maxim Income Opportunity Fund IV, L.P.Jan 2025 · 13 co-filers Sabio Holdings Inc.Jan 2025 · 35 co-filers$9K Haven Fund II LLCJan 2025 · 5 co-filers$50.0M Transposon Therapeutics, Inc.Jul 2024 · 26 co-filers$20.0M Haven Fund II LLCJan 2024 · 5 co-filers$50.0M Haven Fund II LLCJan 2023 · 5 co-filers$50.0M Transposon Therapeutics, Inc.Jan 2023 · 26 co-filers$20.0M Maxim Credit CorpFeb 2013 · 1 co-filer$1.1M Maxim Credit CorpFeb 2013 · 3 co-filers$700K Maxim Credit CorpFeb 2013 · 3 co-filers$1.3M Maxim Credit CorpDec 2012 · 3 co-filers$1.0M Maxim Credit CorpDec 2012 · 3 co-filers$4.0M Maxim Credit CorpNov 2012 · 1 co-filer$500K Maxim Credit CorpNov 2012 · 3 co-filers$4.2M Maxim Credit CorpNov 2012 · 3 co-filers$2.0M Maxim Credit CorpNov 2012 · 3 co-filers$3.0M

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