Investor · Boston, MA

Brian Wolahan

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Filings

29

SEC Form D

Connections

127

co-filers

Capital

—

across filings

Active

Mar 2009

to Oct 2025

Most-connected co-filers (127)

James Wylie · Boston, MA28 shared Ronald Frashure · Boston, MA27 shared Gary L. Bergstrom · Boston, MA25 shared Anthony F. Taparo · Nashville, TN22 shared Kenneth C. Mitchell · Nashville, TN22 shared Teresa F. Sparks · Nashville, TN21 shared Churchill Franklin · Boston, MA21 shared John R. Chisholm · Boston, MA21 shared Clifford D. Adlerz · Nashvile, TN21 shared R. D. Kennedy · Nashville, TN18 shared Mark J. Minichiello · Boston, MA18 shared Ronald L. Brank · Nashville, TN15 shared Symbion, Inc · Nashville, TN15 shared George F. Goodwin · Nashville, TN15 shared Douglas C. Reed · Durham, NC14 shared Darrell B. Naish · Nashville, TN13 shared Raymond F. Mui · Boston, MA12 shared Jennifer B. Baldock · Nashville, TN12 shared Richard E. Waldo · Plymouth, MA11 shared Symbion Holdings Corporation · Nashville, TN8 shared Eugene N. Christian · Covington, GA7 shared Randall Hoover · Nashville, TN7 shared Acadian Asset Management Llc · Boston, MA5 shared Symbion Ambulatory Resource Centres, Inc · Nashville, TN5 shared

Recent filings (29)

COLAB SOFTWARE INC.Oct 2025 · 18 co-filers$21.0M CoLab AI Inc.Oct 2025 · 20 co-filers$14.8M LUBBOCK HEART HOSPITAL, LLCMay 2012 · 16 co-filers$2.6M Valley Ambulatory Surgery Center, L.P.Jan 2012 · 22 co-filers$190K Boulder Spine Center, LLCJul 2011 · 27 co-filers$81K Animas Surgical Hospital, LLCJun 2011 · 17 co-filers$506K Honolulu Spine Center, LLCDec 2010 · 33 co-filers$57K Specialty Surgical Center of Encino LLCNov 2010 · 27 co-filers$766K Surgery Center of Pennsylvania, LLCNov 2010 · 27 co-filers$512K Gresham Station Surgery Center, LLCNov 2010 · 35 co-filers$443K Novi Surgery Center, LLCNov 2010 · 27 co-filers$9K JACKSONVILLE BEACH SURGERY CENTER LPOct 2010 · 24 co-filers$50K Independence Surgery Center, LLCJul 2010 · 28 co-filers$2.5M Hand Surgery Center of Louisiana, L.P.Jul 2010 · 20 co-filers$240K SURGICAL HOSPITAL OF AUSTIN LPMay 2010 · 21 co-filers$57K TEXARKANA SURGERY CENTER LPMar 2010 · 19 co-filers$227K ACADIAN GLOBAL LONG-SHORT FUND LLCMar 2010 · 17 co-filers NORTHSTAR SURGICAL CENTER, L.P.Mar 2010 · 16 co-filers$188K Gresham Station Surgery Center, LLCJan 2010 · 28 co-filers$193K SURGICAL HOSPITAL OF AUSTIN LPDec 2009 · 23 co-filers$229K ACADIAN ADR FUND LLCDec 2009 · 19 co-filers Specialty Surgical Center of Encino LLCOct 2009 · 25 co-filers$1.3M Gresham Station Surgery Center, LLCSep 2009 · 24 co-filers$373K ARC of Bellingham LPAug 2009 · 18 co-filers$401K Acadian Emerging Markets Equity II Fund, LLCApr 2009 · 19 co-filers

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