Investor · Waltham, MA
David Grayzel
Open David in the network graph →Filings
51
SEC Form D
Connections
241
co-filers
Capital
$87.4M
across filings
Active
Apr 2020
to Apr 2022
Most-connected co-filers (241)
Rachel Humphrey · Waltham, MA14 sharedJean-Francois Formela · Cambridge, MA13 sharedMichael Ross · Chagrin Falls, OH12 sharedJoseph L. Farmer · Waltham, MA12 sharedDaniel S. Lynch · Cambridge, MA11 sharedSunny Bates · Scottsdale, AZ10 sharedMarcelo M. Vedovatto · Boston, MA10 sharedAlaina A. Danley · Camana Bay, Cayman Islands10 sharedAlex Cyrell · Scottsdale, AZ10 sharedRobert L. Sterne · JACKSONVILLE, FL9 sharedPaul A. Rosenbaum · JACKSONVILLE, FL9 sharedJeffrey L. Parker · JACKSONVILLE, FL9 sharedJoshua Resnick · Los Angeles, CA9 sharedJohn J. Huggins · Denver, CO9 sharedFrank P. Newman · JACKSONVILLE, FL9 sharedRick Modi · WALTHAM, MA8 sharedCynthia L. Poehlman · Jacksonville, FL8 sharedBruce Booth · Cambridge, MA8 sharedJason Rhodes · Cambridge, MA7 sharedKevin Bitterman · Cambridge, MA7 sharedLuc Vandenberghe · WALTHAM, MA6 sharedRobert Weisskoff · Berkeley, CA6 sharedCarl M. Berke · Cambridge, MA6 sharedMerion Eagle Ridge JV GP, LLC · Wynnewood, PA6 shared
Recent filings (51)
Triana Biomedicines, Inc.Dec 2025 · 15 co-filers$120.1MTriana Biomedicines, Inc.Dec 2025 · 15 co-filers$120.1MAffinia Therapeutics Inc.Oct 2025 · 25 co-filers$45.0MAtlas Venture Fund XIV, L.P.Dec 2024 · 9 co-filers$450.0MComanche Biopharma Corp.Jan 2024 · 21 co-filers$75.0MComanche Biopharma Corp.Jan 2024 · 21 co-filers$75.0MTriana Biomedicines, Inc.Apr 2022 · 21 co-filers$85.1MAtlas Venture Fund XIII, L.P.Mar 2022 · 11 co-filers$450.0MTriana Biomedicines, Inc.Feb 2022 · 17 co-filers$80.0MIvy Co-Invest Vehicle II LLCDec 2021 · 7 co-filersAtlas Venture Opportunity Fund II, L.P.Oct 2021 · 11 co-filers$300.0MSanti Therapeutics, Inc.Sep 2021 · 10 co-filers$10.0MAffinia Therapeutics Inc.May 2021 · 34 co-filers$110.0MALEXANDER SERIES TRUSTApr 2021 · 11 co-filersXilio Therapeutics, Inc.Feb 2021 · 30 co-filers$95.0MXilio Therapeutics, Inc.Jan 2021 · 32 co-filers$50.2MPARKERVISION INCAug 2020 · 14 co-filers$353KAerovate Therapeutics, Inc.Aug 2020 · 9 co-filers$75.8MAerovate Therapeutics, Inc.Aug 2020 · 9 co-filers$75.8MPARKERVISION INCAug 2020 · 14 co-filers$175KPARKERVISION INCJul 2020 · 14 co-filers$215KAtlas Venture Fund XII, L.P.Jun 2020 · 11 co-filers$400.0MPARKERVISION INCJun 2020 · 14 co-filers$483KPARKERVISION INCMay 2020 · 14 co-filers$500KIvy Co-Invest Vehicle LLCApr 2020 · 9 co-filers
Derived from public SEC Form D (Reg D) filings; entities resolved probabilistically. See David in the interactive graph →