Investor · Boston, MA
Brian Piper
Open Brian in the network graph →Filings
15
SEC Form D
Connections
94
co-filers
Capital
$70.0M
across filings
Active
Jan 2023
to May 2025
Most-connected co-filers (94)
Andrew Fedder · Boston, MA14 sharedAdam Friedman · Boston, MA10 sharedBrandon B. Martin · Atlanta, GA8 sharedBetsy Zimmerman · New York, NY8 sharedClyde B. Tuggle · Atlanta, GA8 sharedCole T. Bestgen · Kirkwood, MO8 sharedNorman R. Amey · St. Peter Port, Y76 sharedSteven R. Batchelor · London, United Kingdom6 sharedAndrew R. Whittaker · St. Peter Port, Y76 sharedHolly Nielsen · Kansas City, MO6 sharedJustin Von Simson · London, United Kingdom6 sharedNitin `. Saigal · Brooklyn, NY6 sharedDavid Carpenter · Peekskill, NY5 sharedR. Hg Titan 2 General Partner (Guernsey) Limited · ST PETER PORT, Y74 sharedR. Hg Titan 2 General Partner L.P. Inc · ST PETER PORT, Y74 sharedR. Hg Titan 2 General Partner (Guernsey) Limited · ST PETER PORT, Y74 sharedR. Hg Titan 2 General Partner L.P. Inc · ST PETER PORT, Y74 sharedCaspar Herzberg · Boulder, CO3 sharedDaniel A. O'Byrne · New York, NY3 sharedChris Shelton · Boulder, CO3 sharedNicholas Humphries · London, United Kingdom3 sharedSarah Lambert · Boulder, CO3 sharedLuis D'Acosta · Boulder, CO3 sharedJoel Abramson · Boulder, CO3 shared
Recent filings (15)
Tendril Holdings, LLCOct 2025 · 38 co-filers$39.0MTendril Holdings, LLCAug 2025 · 41 co-filers$30.0MAntares Therapeutics, Inc.May 2025 · 18 co-filers$136.7MAntares Therapeutics, Inc.May 2025 · 18 co-filers$136.7MTendril Holdings, LLCMar 2025 · 41 co-filers$15.0MAntares Therapeutics, Inc.Mar 2025 · 8 co-filers$40.0MAntares Therapeutics, Inc.Mar 2025 · 8 co-filers$40.0MScorpion Therapeutics, Inc.Jul 2024 · 29 co-filers$150.0MScorpion Therapeutics, Inc.Jul 2024 · 29 co-filers$150.0MHG TITAN 2 EUR C L.P.Mar 2023 · 20 co-filersHG TITAN 2 EUR B L.P.Mar 2023 · 21 co-filersHG TITAN 2 A L.P.Mar 2023 · 21 co-filersHG TITAN 2 C L.P.Mar 2023 · 20 co-filersHG TITAN 2 EUR A L.P.Mar 2023 · 21 co-filersHG TITAN 2 B L.P.Mar 2023 · 21 co-filersDerby at Steeplechase, LLCMar 2023 · 23 co-filers$26.0MDerby at Steeplechase, LLCJan 2023 · 23 co-filers$26.0MPrexa Pharmaceuticals IncApr 2011 · 7 co-filers$7.0M
Derived from public SEC Form D (Reg D) filings; entities resolved probabilistically. See Brian in the interactive graph →