Peter Barrett
InvestorFounderPartner at Atlas Venture · Co-founder & Board Member at Obsidiantx
Massachusetts
Writes $500K – $5M checks · typically $2M
FoundedObsidiantx
Find your path to Peter
Sign up to see every warm intro you have to Peter
- Paths you didn't know you had: your email and LinkedIn already hold routes to Peter. We find them for you
- 2nd- and 3rd-degree connections: the friend-of-a-friend routes that take hours to manually find through your inbox or LinkedIn
- Answers now, not in days: momentum is everything in a raise. Skip asking around whether someone knows someone
Days of research, done the moment you sign in, with every route ranked by how warm it is.
About
Peter Barrett has worked at Atlas Venture since 2002, helping create therapeutic and drug discovery platform companies. Before Atlas, he co-founded Celera Genomics, serving as executive vice president and chief business officer, and previously held senior management roles at Applera. He holds a BS in chemistry from Lowell Technological Institute (now UMass Lowell) and a PhD in analytical chemistry from Northeastern University.
Contact· self-published, not guessed
Invests in
Biotech
Co-founder & Board Member at Obsidiantx
Intro paths
In turn, Peter can intro founders to Obsidiantx's investors below.
Obsidiantx's investors · 4
Co-founders at Obsidiantx

Deals · 1
Antegrin TherapeuticsBoard seat
via Atlas Venture · filed Aug 2017 · $26M raise
Attribution from SEC filings, press coverage, and firm rosters.
Other disclosed investments
Board seats
Alnylam PharmaceuticalsArchemixCadent TherapeuticsHarbour AntibodiesLarimar TherapeuticsMomentaNovamedNucleate BioObsidian TherapeuticsRevvitySirion TherapeuticsStromedixSynlogicVitae Pharmaceuticals
Investor
ArchemixCadent TherapeuticsDeepscaleHarbour AntibodiesIndalo TherapeuticsInfacare PharmaceuticalJenaValveLarimar TherapeuticsMomenta PharmaceuticalsObsidian TherapeuticsPosterousRaze TherapeuticsStromedixSynlogic
Sources: the firm's website · SEC Form D filings · curated public sources.
Colleagues at Atlas Venture
Network2
Investors connected to Peter in public investor directories — a warm-intro map.
Frequently asked questions
- Who is Peter Barrett?
- Peter Barrett has worked at Atlas Venture since 2002, helping create therapeutic and drug discovery platform companies. Before Atlas, he co-founded Celera Genomics, serving as executive vice president and chief business officer, and previously held senior management roles at Applera. He holds a BS in chemistry from Lowell Technological Institute (now UMass Lowell) and a PhD in analytical chemistry from Northeastern University.
- Where does Peter Barrett work?
- Peter Barrett is Co-founder & Board Member of Obsidiantx and Partner at Atlas Venture.
- What does Peter Barrett invest in?
- Peter Barrett invests in Biotech.
- What check size does Peter Barrett write?
- Peter Barrett typically writes checks of $500K – $5M.
- What companies did Peter Barrett found?
- Peter Barrett founded Obsidiantx.
- What boards does Peter Barrett sit on?
- Peter Barrett holds tracked board seats at Alnylam Pharmaceuticals, Antegrin Therapeutics, Archemix, Cadent Therapeutics, Harbour Antibodies, Larimar Therapeutics, Momenta, Novamed, Nucleate Bio, Obsidian Therapeutics.
- What companies has Peter Barrett invested in?
- Investments tracked here include Archemix, Cadent Therapeutics, Deepscale, Harbour Antibodies, Indalo Therapeutics, Infacare Pharmaceutical, JenaValve, Larimar Therapeutics, Momenta Pharmaceuticals, Obsidian Therapeutics, Posterous, Raze Therapeutics, and 2 more.
Founder mafias
Harvard Business School mafia1,305
Also came through, then founded or led a company.
Atlas Venture mafia40
Also came through, then founded or led a company.
Perkinelmer mafia11
Also came through, then founded or led a company.
Synlogic mafia3
Also came through, then founded or led a company.
About this profile. Compiled from public sources — Atlas Venture's own website, regulatory filings and public professional profiles — and summarised by Fundraising Fox; every fact is kept with where it came from. Spotted an error, or would rather not be listed? Email privacy@fundraisingfox.com · How we build profiles · Your rights
























