Investor · Cambridge, MA

Peter Barrett

Open Peter in the network graph →

Filings

22

SEC Form D

Connections

121

co-filers

Capital

$378.7M

across filings

Active

Jun 2009

to May 2025

Most-connected co-filers (121)

Arnd Kaltofen · Wilmington, DE3 shared Erik Amble · Irvine, CA3 shared Raymond Cohen · SAN RAMON, CA3 shared Olivier Litzka · Irvine, CA3 shared Hans-Reiner Figulla · Wilmington, DE3 shared Ouyang Xiangyu · Wilmington, DE3 shared Edward Mathers · Cambridge, MA3 shared Todd Chernecki · Los Angeles, CA2 shared John Alexiou · Los Angeles, CA2 shared James Bristol · Providence, RI2 shared Michael Gilman · Belmont, MA2 shared Nick Leschly · Cambridge, MA2 shared William Koster · Providence, RI2 shared Todd Shegog · Cambridge, MA2 shared William H. Koster · Boston, MA2 shared Frank S. Menniti · Kingston, RI2 shared Aoife Brennan · Cambridge, MA2 shared Jan Keltjens · Irvine, CA2 shared Patrick Van Beneden · Irvine, CA2 shared Chau Khuong · Maple Grove, MN2 shared Richard Horan · Providence, RI2 shared Jose Carlos Gutierrez-Ramos · Cambridge, MA1 shared Daniel S. Lynch · Cambridge, MA1 shared Michael J. Powell · Billerica, MA1 shared

Recent filings (22)

PsiQuantum, Corp.May 2025 · 13 co-filers$22.0M PsiQuantum, Corp.May 2025 · 13 co-filers$22.0M Mosaic ML, Inc.Jul 2021 · 9 co-filers$25.0M Mosaic ML, Inc.Jul 2021 · 9 co-filers$25.0M Anjuna Security, Inc.Jul 2021 · 7 co-filers$30.0M Anjuna Security, Inc.Jul 2021 · 7 co-filers$30.0M Playground Compute, L.P.Jun 2021 · 8 co-filers$30.0M Playground Compute, L.P.Jun 2021 · 8 co-filers$30.0M Artificial, Inc.May 2021 · 7 co-filers$22.2M Artificial, Inc.May 2021 · 7 co-filers$22.2M SYNLOGIC, INC.Jun 2019 · 18 co-filers$80.0M SYNLOGIC, INC.Jun 2019 · 18 co-filers$80.0M SubPac, Inc.Jul 2018 · 3 co-filers$9.8M SubPac, Inc.Jul 2018 · 3 co-filers$9.8M Obsidian Therapeutics, Inc.Dec 2017 · 11 co-filers$49.9M Obsidian Therapeutics, Inc.Dec 2017 · 11 co-filers$49.9M Bingham Natural Wines, LLCSep 2017 · 5 co-filers$400K Bingham Natural Wines, LLCSep 2017 · 5 co-filers$400K SYNLOGIC, INC.May 2017 · 17 co-filers$42.0M SYNLOGIC, INC.May 2017 · 17 co-filers$42.0M SubPac, Inc.Nov 2015 · 7 co-filers$7.0M SubPac, Inc.Nov 2015 · 7 co-filers$7.0M JenaValve Technology IncAug 2015 · 20 co-filers$26.5M JenaValve Technology IncAug 2015 · 20 co-filers$26.5M Mnemosyne Pharmaceuticals IncFeb 2015 · 11 co-filers$13.0M

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