Investor · New York, NY

Jason D. Papastavrou

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Filings

11

SEC Form D

Connections

22

co-filers

Capital

—

across filings

Active

Mar 2009

to Jan 2026

Most-connected co-filers (22)

David Brown · Boulder, CO5 shared John P. Morrill · Portland, ME5 shared David Johnson · St. Louis Park, MN5 shared William T. Mills · Birmingham, AL5 shared Dana Messina · LOS ANGELES, CA5 shared Charles D. Perry · Birmingham, AL5 shared James Straight · Woodside, CA5 shared Gregory Raleigh · Woodside, CA5 shared Charles Giancarlo · Santa Clara, CA5 shared George Nathanail · Grand Cayman KY1-9005, Cayman Islands2 shared Ian S. Goodall · George Town, Grand Cayman, Cayman Islands2 shared Mark Blumling · Corte Madera, CA2 shared Gregory Shrock · New York, NY2 shared Scott Jaglowitz · Markham, Ontario, Canada2 shared John Dill · Denver, CO2 shared Martin J. Byrne · Grand Cayman, Cayman Islands2 shared Heather Brennan · Durham, NC1 shared June S. Almenoff · Durham, NC1 shared Stefan Roberts · Durham, NC1 shared Ashutosh Chilkoti · Durham, NC1 shared Krista Jacobsen · Redwood City, CA1 shared Juliana Blum · Durham, NC1 shared

Recent filings (11)

inSoma Bio, Inc.Jan 2026 · 4 co-filers$4.0M inSoma Bio, Inc.Oct 2025 · 14 co-filers$3.0M Headwater Partners I LLCJun 2012 · 10 co-filers$4.6M Headwater Partners I LLCDec 2011 · 9 co-filers$3.6M Headwater Partners I LLCFeb 2011 · 9 co-filers$2.1M ItsOn Inc.Mar 2010 · 9 co-filers$3.3M Headwater Partners I LLCMar 2010 · 9 co-filers$1.8M ARIS Multi-Strategy Plus Offshore Fund, Ltd.Mar 2010 · 2 co-filers ARIS Multi-Strategy Offshore Fund, Ltd.Mar 2010 · 2 co-filers ARIS Multi-Strategy Fund, LPMar 2010 · 1 co-filer Aris Multi Strategy Fund L PMar 2009 · 1 co-filer

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