Investor · Los Angeles, CA

Matthew S. Feinstein

Open Matthew in the network graph →

Filings

118

SEC Form D

Connections

168

co-filers

Capital

$1.2M

across filings

Active

Sep 2020

to Mar 2023

Most-connected co-filers (168)

Parag Jagdale · COPLEY, OH56 shared Ray Davis · Kirkland, WA54 shared Brian J. Flaherty · Sunnyvale, CA54 shared Samuel B. Barnett · NORTHBROOK, IL42 shared Matthew L. Aven · NORTHBROOK, IL42 shared Eric Kennedy · Los Angeles, CA28 shared SBB Research Group LLC · Northbrook, IL25 shared Jeffrey C. Danley · Provo, UT23 shared James D. Dunn · Provo, UT23 shared Kevin G. Sarney · Cambridge, MA23 shared Sean Cunningham · Los Angeles, CA23 shared Robert L. Van Nostrand · Cambridge, MA23 shared Jeffrey D. Burningham · Provo, UT23 shared Brad A. Greenstein · Northbrook, IL19 shared Sandeep D. Navalgund · Northbrook, IL19 shared Paul Sekhri · Ann Arbor, MI18 shared Walter M. Kelly · Northbrook, IL17 shared Shawn S. Credle · Los Angeles, CA13 shared Katherine S. Hill · Los Angeles, CA13 shared Gabriel Dean · Lowell, MI12 shared Sbb Research Group Llc · Northbrook, IL12 shared Denise A. D'Entremont · Boston, MA12 shared Wayne Riley · Mountain View, CA12 shared Adam Rondeau · Horace, ND11 shared

Recent filings (118)

SBB Research Group Polysight I LLCFeb 2026 · 5 co-filers SBB RESEARCH GROUP CPS FUND XI LLCFeb 2026 · 5 co-filers SBB Research Group Polysight I LLCSep 2025 · 14 co-filers SBB RESEARCH GROUP CPS FUND XI LLCSep 2025 · 13 co-filers SBB Research Group Polysight I LLCFeb 2025 · 17 co-filers SBB RESEARCH GROUP CPS FUND XI LLCFeb 2025 · 17 co-filers SBB Research Group Polysight I LLCFeb 2024 · 17 co-filers SBB RESEARCH GROUP CPS FUND XI LLCFeb 2024 · 17 co-filers SBB RESEARCH GROUP CPS I LLCFeb 2024 · 16 co-filers SBB Research Group Investors III LLCFeb 2024 · 17 co-filers SBB Research Group Investors IV LLCFeb 2024 · 17 co-filers PINEAPPLE EXPRESS CANNABIS CoMar 2023 · 2 co-filers$2.0M SBB Research Group Investors IV LLCFeb 2023 · 17 co-filers SBB Research Group Polysight I LLCFeb 2023 · 17 co-filers SBB RESEARCH GROUP CPS FUND XI LLCFeb 2023 · 17 co-filers SBB RESEARCH GROUP CPS I LLCFeb 2023 · 16 co-filers SBB Research Group Investors III LLCFeb 2023 · 17 co-filers PINEAPPLE, INC.Oct 2022 · 14 co-filers$249K Amnesia Media CoJul 2022 · 11 co-filers$1.0M SBB Research Group Polysight I LLCMar 2022 · 17 co-filers SBB Research Group Investors IV LLCMar 2022 · 17 co-filers SBB Research Group Investors III LLCMar 2022 · 17 co-filers SBB RESEARCH GROUP CPS I LLCFeb 2022 · 16 co-filers SBB RESEARCH GROUP CPS FUND XI LLCFeb 2022 · 17 co-filers Amnesia Media CoFeb 2022 · 11 co-filers$630K

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