Investor · Portland, OR

Brian Sonnichsen

Open Brian in the network graph →

Filings

15

SEC Form D

Connections

31

co-filers

Capital

$2.6M

across filings

Active

Mar 2016

to Feb 2026

Most-connected co-filers (31)

Chicago Capital Management, Llc · Chicago, IL8 shared Mark Kroloff · LOS ANGELES, CA8 shared Chicago Capital Management, Llc · Chicago, IL7 shared Shawn Huff · Portland, OR6 shared Gerbel Steven · Chicago, IL5 shared Evan Rege · Portland, OR5 shared Bank Regions · Birmingham, AL3 shared Frank Walburn · Birmingham, AL3 shared Jim Bates · Birmingham, AL3 shared Brian Burke · Santa Rosa, CA3 shared Thomas A. Daniel · Seattle, WA3 shared Philip J. Balderson · St Helier, Y93 shared Kevin Seramur · Portland, OR3 shared Quinton Hennigh · Vancouver, British Columbia, Canada3 shared Alan Meehan · Dublin, Ireland2 shared Donald Heath · Birmingham, AL2 shared Ben Whitaker · Birmingham, AL2 shared Kevin Talbot · New York, NY2 shared Thomas S. Cowee · Atlanta, GA2 shared Michael Buckley · Dublin, Ireland2 shared Josh B. Makower · Natick, MA2 shared John F. Greathouse · Carlsbad, CA2 shared Rick F. Smith · Carlsbad, CA2 shared Robert F. Luddy · Carlsbad, CA2 shared

Recent filings (15)

Chicago Capital Onshore Fund, LLCFeb 2026 · 1 co-filer Chicago Capital Onshore Fund, LLCDec 2025 · 4 co-filers Chicago Capital Onshore Fund, LLCDec 2025 · 4 co-filers GrowlerWerks, Inc.Feb 2021 · 9 co-filers$795K GrowlerWerks, Inc.Feb 2021 · 9 co-filers$795K Chicago Capital Onshore Fund, LLCJul 2020 · 4 co-filers Chicago Capital Onshore Fund, LLCJul 2019 · 3 co-filers Chicago Capital Onshore Fund, LLCJul 2018 · 3 co-filers Regions Forest Fund, LLCMar 2018 · 8 co-filers Chicago Capital Onshore Fund, LLCJul 2017 · 3 co-filers Regions Forest Fund, LLCMar 2017 · 14 co-filers GrowlerWerks, Inc.Feb 2017 · 11 co-filers$1.5M Chicago Capital Onshore Fund, LLCJul 2016 · 4 co-filers GrowlerWerks, Inc.Jul 2016 · 11 co-filers$1.1M Regions Forest Fund, LLCMar 2016 · 14 co-filers Chicago Capital Management, LLCMar 2016 · 5 co-filers

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