Investor · Boulder, CO

Jason Winsten

Open Jason in the network graph →

Filings

34

SEC Form D

Connections

87

co-filers

Capital

$1.6B

across filings

Active

Mar 2023

to Feb 2026

Most-connected co-filers (87)

John Hodge · Boulder, CO22 shared Steve Carpenter · Boulder, CO22 shared Andrew Gesell · Boulder, CO10 shared Thomas H. Wood · New York, NY8 shared Edward J. Buckley Iii · West Hollywood, CA8 shared Spencer Cole · Toronto, Ontario, Canada8 shared Rael N. Nurick · NEW YORK, NY8 shared Kyle Floyd · Toronto, Ontario, Canada8 shared Rubicon Technology Partners Iv Gp L.L.C · Boulder, CO7 shared Rubicon Technology Partners Iv Gp L.L.C · Boulder, CO6 shared Rubicon Technology Partners Iv Gp L.L.C · Boulder, CO6 shared Rubicon Technology Partners Iii Gp L.L.C · Boulder, CO5 shared Rubicon Technology Partners Iii Gp L.L.C · Boulder, CO5 shared Ginger Mosier · New York, NY4 shared Geoffrey W. Moore · Chandler, AZ4 shared Brian Gentile · Altrincham, United Kingdom4 shared N. Sandton Capital Partners Lp · New York, NY4 shared Joanne Ferstman · Montreal, Quebec, Canada4 shared John Burzynski · Montreal, Quebec, Canada4 shared N. Sandton Capital Partners Lp · New York, NY4 shared Joseph Yanchik · San Diego, CA4 shared Vishal Rao · Austin, TX4 shared Evan Reiser · San Francisco, CA4 shared Oliver Q. Pearce · Dollar, United Kingdom4 shared

Recent filings (34)

RTP M Holdings LPFeb 2026 · 3 co-filers RTP L Holdings LPMay 2025 · 5 co-filers Rubicon Continuation Fund L.P.Oct 2024 · 5 co-filers Rubicon Fund II Roll L.P.Aug 2024 · 10 co-filers Rubicon Continuation Fund L.P.Aug 2024 · 4 co-filers RTP C Holdings Roll LPAug 2024 · 10 co-filers RTP K Holdings LPMay 2024 · 5 co-filers Sandton Capital Solutions Offshore Fund VI, LPMar 2024 · 11 co-filers$450.0M Sandton Capital Solution Onshore Fund VI, LPMar 2024 · 11 co-filers$450.0M Sandton Onshore Fund V Co-Invest, LPFeb 2024 · 10 co-filers Sandton Offshore Fund V Co-Invest LPFeb 2024 · 10 co-filers RTP J Holdings LPOct 2023 · 5 co-filers Rubicon Technology Partners IV L.P.Mar 2023 · 5 co-filers RTP H Holdings LPMar 2023 · 6 co-filers RTP G Holdings LPDec 2022 · 11 co-filers RTP F Holdings LPAug 2022 · 12 co-filers Abnormal Security CorpMay 2022 · 2 co-filers$300.0M Abnormal Security CorpMay 2022 · 19 co-filers$300.0M Rubicon Technology Partners IV L.P.Mar 2022 · 11 co-filers Sandton Onshore Fund IV Co-Invest, LPAug 2021 · 10 co-filers Sandton Offshore Fund IV Co-Invest, LPAug 2021 · 10 co-filers RTP D Holdings LPJun 2021 · 13 co-filers Sandton Capital Solutions Offshore Fund V, LPMar 2021 · 11 co-filers Sandton Capital Solutions Onshore Fund V, LPMar 2021 · 11 co-filers Abnormal Security CorpMar 2021 · 17 co-filers$60.0M

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