Investor · Northbrook, IL
Brad A. Greenstein
Open Brad in the network graph →Filings
46
SEC Form D
Connections
118
co-filers
Capital
$6.4B
across filings
Active
Oct 2020
to Sep 2025
Most-connected co-filers (118)
Sandeep D. Navalgund · Northbrook, IL43 sharedSamuel B. Barnett · NORTHBROOK, IL38 sharedMatthew L. Aven · NORTHBROOK, IL38 sharedWalter M. Kelly · Northbrook, IL34 sharedWayne Riley · Mountain View, CA30 sharedAdam Rondeau · Horace, ND30 sharedTom Waddell · Horace, ND29 sharedGabriel Dean · Lowell, MI29 sharedMarian M. Walters · Edison, NJ27 sharedDiameter Associates LLC · New York, NY27 sharedParag Jagdale · COPLEY, OH22 sharedRay Davis · Kirkland, WA22 sharedSbb Research Group Llc · Northbrook, IL21 sharedSbb Research Group Llc · Northbrook, IL21 sharedSbb Research Group Llc · Northbrook, IL21 sharedBrian J. Flaherty · Sunnyvale, CA19 sharedMatthew S. Feinstein · Los Angeles, CA19 sharedBrandon Bertrang · Ann Arbor, MI11 sharedJohn Claytor · Village of Golf, FL11 sharedSean F. Nicolosi · Boston, MA10 sharedArkadi A. Kuhlmann · Jacksonville, FL10 sharedRemi Ducrocq · New York, NY9 sharedDavid B. Goone · New York, NY9 sharedJing Zhou · Grand Cayman, Cayman Islands8 shared
Recent filings (46)
SBB Research Group Polysight I LLCSep 2025 · 14 co-filersSBB Research Group Polysight III, LLCSep 2025 · 14 co-filersSBB RESEARCH GROUP CPS FUND XI LLCSep 2025 · 13 co-filersSBB Research Group Investors I LLCAug 2025 · 14 co-filersSBB Research Group Polysight Odin LLCFeb 2025 · 17 co-filersSBB Research Group Polysight I LLCFeb 2025 · 17 co-filersSBB RESEARCH GROUP POLYSIGHT II LLCFeb 2025 · 17 co-filersSBB Research Group Polysight III, LLCFeb 2025 · 17 co-filersSBB RESEARCH GROUP CPS FUND XI LLCFeb 2025 · 17 co-filersSBB RESEARCH GROUP CPS FUND XI LLCFeb 2024 · 17 co-filersSBB RESEARCH GROUP CPS I LLCFeb 2024 · 16 co-filersSBB Research Group Polysight I LLCFeb 2024 · 17 co-filersSBB Research Group Investors IV LLCFeb 2024 · 17 co-filersSBB Research Group Investors III LLCFeb 2024 · 17 co-filersSBB RESEARCH GROUP POLYSIGHT II LLCFeb 2024 · 17 co-filersSBB Research Group Investors II LLCFeb 2024 · 17 co-filersSBB Research Group Polysight Odin LLCFeb 2024 · 17 co-filersSBB Research Group Polysight III, LLCFeb 2024 · 17 co-filersSBB Research Group Polysight Odin LLCAug 2023 · 16 co-filersSBB Research Group Polysight III, LLCFeb 2023 · 17 co-filersSBB RESEARCH GROUP POLYSIGHT II LLCFeb 2023 · 17 co-filersSBB Research Group Polysight I LLCFeb 2023 · 17 co-filersSBB Research Group Investors IV LLCFeb 2023 · 17 co-filersSBB Research Group Investors III LLCFeb 2023 · 17 co-filersSBB Research Group Investors II LLCFeb 2023 · 17 co-filers
Derived from public SEC Form D (Reg D) filings; entities resolved probabilistically. See Brad in the interactive graph →