Investor · San Francisco, CA
Beth Seidenberg
Open Beth in the network graph →Filings
139
SEC Form D
Connections
690
co-filers
Capital
$509.8M
across filings
Active
Jul 2009
to Oct 2025
Most-connected co-filers (690)
David Benoit · Hartford, CT17 sharedMichael Kramer · New York, NY17 sharedTrent Vichie · New York, NY17 sharedDaniel Brauser · New York, NY17 sharedAdrienne Saunders · New York, NY16 sharedGrant Fitzwilliam · Fort Lauderdale, FL16 sharedJennifer Calabrese · New York, NY16 sharedDavid Mott · Leiden, P714 sharedRichard Rodgers · Fremont, CO13 sharedMichael Corasaniti · Fairfield, CT12 sharedMichael Dorrell · New York, NY12 sharedMichael D. Heffernan · Seattle, WA10 sharedPaul Minton · New York, NY10 sharedBob Higgins · South San Francisco, CA10 sharedGordon Ringold · San Carlos, CA9 sharedAnthony M. Rojas · Seattle, WA9 sharedJohn J. Tobin · Seattle, WA9 sharedBryan J. Weeks · Seattle, WA9 sharedBradford G. Jackson · Seattle, WA8 sharedJames Young · Vancouver, British Columbia, Canada8 sharedJames D. Mitchell · Seattle, WA8 sharedDavid Goeddel · San Francisco, CA8 sharedGad F. Soffer · BRISBANE, CA8 sharedSean Harper · Westlake Village, CA8 shared
Recent filings (139)
Star Therapeutics LLCOct 2025 · 24 co-filers$125.0MStar Therapeutics LLCOct 2025 · 24 co-filers$125.0MLatigo Biotherapeutics, Inc.Feb 2025 · 15 co-filers$150.0MLatigo Biotherapeutics, Inc.Feb 2025 · 15 co-filers$150.0MArsenal Biosciences, Inc.Sep 2024 · 21 co-filers$325.4MWestlake BioPartners Fund III, L.P.Jun 2023 · 6 co-filers$450.0MChromaCode, Inc.Feb 2023 · 22 co-filers$43.0MArsenal Biosciences, Inc.Sep 2022 · 20 co-filers$230.8MArsenal Biosciences, Inc.Sep 2022 · 17 co-filers$33.0MSlalom Investments, LPJun 2022 · 19 co-filers$675KSlalom Investments, LPJun 2022 · 19 co-filers$1.1MChromaCode, Inc.Mar 2022 · 27 co-filers$50.7MWestlake BioPartners Opportunity Fund I, L.P.Jun 2021 · 10 co-filers$100.0MPhylos Bioscience, Inc.May 2021 · 14 co-filers$5.0MSquare, Inc.May 2021 · 34 co-filers$10.7MPhylos Bioscience, Inc.Apr 2021 · 14 co-filers$26.0MSlalom Investments, LPApr 2021 · 19 co-filers$835KSlalom Investments, LPApr 2021 · 16 co-filers$500KVera Therapeutics, Inc.Feb 2021 · 13 co-filers$70.7MVera Therapeutics, Inc.Feb 2021 · 13 co-filers$70.7MSagimet Biosciences Inc.Jan 2021 · 17 co-filers$80.0MSagimet Biosciences Inc.Jan 2021 · 17 co-filers$80.0MChromaCode, Inc.Dec 2020 · 23 co-filers$41.2MSlalom Investments, LPJul 2020 · 16 co-filers$275KSlalom Investments, LPJul 2020 · 19 co-filers$600K
Derived from public SEC Form D (Reg D) filings; entities resolved probabilistically. See Beth in the interactive graph →