Investor · Mill Valley, CA

Jay Posner

Open Jay in the network graph →

Filings

51

SEC Form D

Connections

130

co-filers

Capital

$201.2M

across filings

Active

Dec 2018

to Dec 2025

Most-connected co-filers (130)

Martin Green · Mill Valley, CA47 shared Tony Fenner-Leitao · Mill Valley, CA37 shared Cambrian Asset Management Inc · Mill Valley, CA25 shared Cambrian Asset Management Inc · Mill Valley, CA25 shared Cambrian Asset Management Llc · Mill Valley, CA6 shared David H. Skordal · New York, NY6 shared Marwan Younes · STAMFORD, CT6 shared Phil Baldwin · Kearney, NE6 shared Cambrian Asset Management Llc · Mill Valley, CA6 shared Collin Nabity · Kearney, NE6 shared Cambrian Asset Management Llc · Mill Valley, CA6 shared John H. Grady · New York, NY5 shared John R. Collier · Chandler, AZ5 shared Ivo W. Allen · Wall, NJ5 shared Laurie Ann Sims · Pittsburgh, PA5 shared Bill J. Winberg · Kearney, NE5 shared Bryan Roberts · Hampton, NJ5 shared Garrett Svoboda · Lincoln, NE5 shared Stephanie Winberg · Kearney, NE5 shared Hans Olsen · BOSTON, MA5 shared Adam Jackson · Westford, MA5 shared Dax T. Mitchell · Fort Worth, TX5 shared Karen W. Mcmonagle · New York, NY4 shared Cambrian Asset Management, Inc · MILL VALLEY, CA4 shared

Recent filings (51)

Cambrian Core Blockchain Fund LPDec 2025 · 4 co-filers Cambrian Systematic Strategies LPDec 2025 · 4 co-filers Cambrian Systematic Strategies Ltd.Dec 2025 · 4 co-filers Cambrian Systematic Strategies LPMar 2025 · 4 co-filers Cambrian Systematic Strategies Ltd.Mar 2025 · 4 co-filers Cambrian Systematic Strategies Ltd.Feb 2025 · 4 co-filers Cambrian Systematic Strategies LPFeb 2025 · 4 co-filers Cambrian Core Blockchain Fund LPDec 2024 · 5 co-filers Cambrian Systematic Strategies Ltd.Dec 2024 · 5 co-filers Cambrian Systematic Strategies LPDec 2024 · 5 co-filers Cambrian Core Blockchain Fund LPDec 2023 · 4 co-filers Cambrian Systematic Strategies Ltd.Dec 2023 · 4 co-filers Cambrian Systematic Strategies LPDec 2023 · 4 co-filers Cambrian Core Blockchain Fund LPJan 2023 · 4 co-filers Cambrian Systematic Strategies Ltd.Dec 2022 · 4 co-filers Cambrian Systematic Strategies LPDec 2022 · 4 co-filers Cambrian Bitcoin Systematic TrustSep 2022 · 12 co-filers Cambrian Ethereum Systematic TrustSep 2022 · 12 co-filers Cambrian Systematic Strategies Ltd.Sep 2022 · 4 co-filers Cambrian Systematic Strategies LPSep 2022 · 4 co-filers Cambrian Core Blockchain Fund LPSep 2022 · 4 co-filers Billy Jack's Pizza Pub, Inc.Apr 2022 · 13 co-filers$2.5M Black Swan Pharmaceuticals, Inc.Sep 2021 · 13 co-filers$3.0M Cambrian Core Blockchain Fund LPSep 2021 · 4 co-filers Cambrian Systematic Strategies Ltd.Sep 2021 · 10 co-filers

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