Investor · Brookline, MA
Robert Mason
Open Robert in the network graph →Filings
17
SEC Form D
Connections
78
co-filers
Capital
$17.1M
across filings
Active
Oct 2018
to Feb 2026
Most-connected co-filers (78)
Andrew Feinberg · New York, NY8 sharedDavid A. Knight · London, Ontario, Canada7 sharedDavid P. Onzay · Spokane, WA6 sharedPablo Defelippe · Luxembourg, Luxembourg5 sharedSunil Pai · SAN FRANCISCO, CA5 sharedKaren S. Thiel · Clearwater Beach, FL4 sharedAnthony Shaskus · New York, NY4 sharedJordan Jacobs · Toronto, Ontario, Canada4 sharedBlair F. Bernholtz · Toronto, Ontario, Canada4 sharedVan Nguyen · New York, NY4 sharedJohn Illuzzi · New York, NY4 sharedSteven E. Fivel · INDIANAPOLIS, IN3 sharedJohn Rulli · INDIANAPOLIS, IN3 sharedKevin M. Kelly · INDIANAPOLIS, IN3 sharedArgon Ventures Gp Ii, L.L.C · Concord, MA3 sharedDonald G. Frey · INDIANAPOLIS, IN3 sharedDavid Simon · INDIANAPOLIS, IN3 sharedArgon Ventures Gp Ii, L.L.C · Concord, MA3 sharedBrian J. Mcdade · INDIANAPOLIS, IN3 sharedPaul P. Rivett · Spokane, WA3 sharedVivek Goel · Wylie, TX2 sharedRichard S. Sokolov · INDIANAPOLIS, IN2 sharedJonathan S. Barkan · INDIANAPOLIS, IN2 sharedSanjan N. Dhody · Miami Beach, FL2 shared
Recent filings (17)
NEXT CENTURY SPIRITS, INCFeb 2026 · 8 co-filers$15.0MArgon Ventures II, L.P.Jun 2025 · 7 co-filers$20.0MArgon Ventures II, L.P.Jun 2025 · 7 co-filers$20.0MArgon Ventures II, L.P.Jun 2024 · 7 co-filers$36.0MArgon Ventures II, L.P.Jun 2024 · 7 co-filers$36.0MMCS Investments, Inc.Jan 2024 · 25 co-filers$125KMayflower REIT LLCJan 2024 · 23 co-filers$125KApple Blossom REIT, LLCJan 2024 · 23 co-filers$125KThynk Health, LLCOct 2023 · 16 co-filers$1.8MJVP CRED FF I, LPAug 2023 · 8 co-filersJVP CRED Fund I, L.P.Aug 2023 · 8 co-filersArgon Ventures II, L.P.Jun 2023 · 5 co-filers$36.0MArgon Ventures II, L.P.Jun 2023 · 5 co-filers$36.0MThynk Health, LLCAug 2022 · 16 co-filers$1.0MJVP CRED FF I, LPAug 2022 · 8 co-filersJVP CRED Fund I, L.P.Aug 2022 · 8 co-filersVolta Networks, IncApr 2020 · 13 co-filers$18.9MVolta Networks, IncDec 2018 · 14 co-filers$7.0MRadioPublic PBCOct 2018 · 5 co-filers$4.0MRadioPublic PBCOct 2018 · 5 co-filers$4.0MVolta Networks, IncDec 2017 · 5 co-filers$1.0MVolta Networks, IncDec 2017 · 5 co-filers$1.0M
Derived from public SEC Form D (Reg D) filings; entities resolved probabilistically. See Robert in the interactive graph →