Where does Jason P. Hafler work?

Jason P. Hafler is Managing Director at Sanofi Ventures and Board director at Icosavax and Board director at Expansion Therapeutics and Board director at Abcuro.

What check size does Jason P. Hafler write?

Jason P. Hafler typically writes checks of $5M – $10M.

What boards does Jason P. Hafler sit on?

Jason P. Hafler holds tracked board seats at Abcuro, Expansion Therapeutics, Matchpoint Therapeutics, Star Therapeutics, Thumbnail for Escient Pharmaceuticals.

Where did Jason P. Hafler go to school?

Jason P. Hafler studied at University of Cambridge (PhD); Bowdoin College; BB&N.

Jason P. Hafler

Investor

Managing Director at Sanofi Ventures · Board director at Icosavax · Board director at Expansion Therapeutics · Board director at Abcuro

Cambridge, Massachusetts

Writes $5M – $10M checks · typically $7.5M

About

Jason P. Hafler combines venture investing and biotech operating experience—ex-Translate Bio corporate development director and Atlas investor—and leads strategy and is public voice for a corporate VC's early-stage biotech focus.

Contact· self-published, not guessed

j•••@sanofi.comreveal

Invests in

AI & Machine LearningBiotechData & InfrastructureHealthtechMedical Devices

Board director at Icosavax

Intro paths

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In turn, Jason can intro founders to Icosavax's investors below.

Icosavax's investors · 3

Qiming HealthcareBellevue · since 2019 RA CapitalBoston · since 2021 Sanofi VenturesCambridge · $5M checks

Board director at Expansion Therapeutics

Intro paths

→

In turn, Jason can intro founders to Expansion Therapeutics's investors below.

Expansion Therapeutics's investors · 4

5AM VenturesBoston · $100K – $4M checks Kleiner PerkinsMenlo Park · $500K – $15M checks Novartis Venture FundBasel · $5M – $25M checks Sanofi VenturesCambridge · $5M checks · since 2016

Co-founders at Expansion Therapeutics

Matthew DisneyDirector

Board director at Abcuro

Intro paths

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In turn, Jason can intro founders to Abcuro's investors below.

Abcuro's investors · 15

abrdn plcEdinburgh · since 2026 Bain Capital Life SciencesBoston · since 2026 Eurofarma Venturessince 2026 Foresite CapitalWest Hollywood · since 2026 Mass General Brigham VenturesBoston New Enterprise Associates (NEA)Menlo Park · $200K – $40M checks New Leaf Venture PartnersNew York · since 2026 Pontifax Venture CapitalHerzeliya · $6.3M – $128M checks · since 2023 RA CapitalBoston · since 2026 REDMILESan Francisco · since 2026 Rock Springs CapitalBaltimore · since 2026 Samsara BioCapitalPalo Alto · since 2025 Sanofi VenturesCambridge · $5M checks · since 2020 ShangBay Capital LLCPalo Alto Soleus CapitalGreenwich · since 2026

Co-founders at Abcuro

Steven A. GreenbergChief Scientific Advisor & Co-Founder

Steven A. Greenberg, MDChief Scientific Advisor & Co-Founder

Experience

Sanofi VenturesManaging Directorcurrent2019 — present
Sanofi VenturesHead Sanofi Ventures Investments2017 — 2019
Sanofi VenturesSenior Director of Investments2015 — 2017Greater Boston
Sanofi VenturesDirector of Investments2014 — 2015
Buckingham, Browne & NicholsBoard of Trusteescurrent2011 — present
Madgalene College FoundationMember Board of Directorscurrent2011 — present
Beacon Hill Nursery SchoolMember Board of Trustees2018 — 2021
RaNA TherapeuticsCorporate Development2012 — 2014
Bowdoin CollegeFund Directors Board2010 — 2013
Atlas VentureAssociate2010 — 2012
Flagship VenturesFlagship Summer Fellow2010
JSB-Partners, LPAnalyst2004 — 2006

Skills & more

Financial Modeling16Venture Capital34Private Equity16Valuation11Corporate Development36Mergers2Investment Banking2Mergers & Acquisitions7Entrepreneurship8Capital Markets3Asset Management2Strategy9

+8 more

Emerging MarketsInvestmentsStart-upsCorporate FinanceHedge FundsAlternative InvestmentsInvestor RelationsDue Diligence

From Jason's professional profile.

Deals · 2

AbcuroBoard seat

via Sanofi Ventures · filed Jan 2021 · $42M raise

Expansion TherapeuticsBoard seat

via Sanofi Ventures · filed Jun 2017 · $5M raise

Attribution from SEC filings, press coverage, and firm rosters.

Other disclosed investments

Board seats

Matchpoint TherapeuticsStar Therapeutics Thumbnail for Escient Pharmaceuticals

Per SEC Form D filings.

Colleagues at Sanofi Ventures

Anne

Investor at Sanofi Ventures

Becca

Investor at Sanofi Ventures

Camille Ridel

Investor at Sanofi Ventures

Chris

Investor at Sanofi Ventures

Christopher Gagliardi

Principal at Sanofi Ventures

Cris De Luca

Partner, Digital at Sanofi Ventures

Francesc Dosrius Lleonart

Associate Director of Investments at Sanofi Ventures

Jim Trenkle

Investor at Sanofi Ventures

Network4

Camille Ridel

Investor at Sanofi Ventures

Carl Gordon

Managing Partner at OrbiMed

Christopher Gagliardi

Principal at Sanofi Ventures

Cris De Luca

Partner, Digital at Sanofi Ventures

Investors connected to Jason in public investor directories — a warm-intro map.

Frequently asked questions

Who is Jason P. Hafler?: Jason P. Hafler combines venture investing and biotech operating experience—ex-Translate Bio corporate development director and Atlas investor—and leads strategy and is public voice for a corporate VC's early-stage biotech focus.
Where does Jason P. Hafler work?: Jason P. Hafler is Managing Director at Sanofi Ventures and Board director at Icosavax and Board director at Expansion Therapeutics and Board director at Abcuro.
What does Jason P. Hafler invest in?: Jason P. Hafler invests in AI & Machine Learning, Biotech, Data & Infrastructure, Healthtech, Medical Devices.
What check size does Jason P. Hafler write?: Jason P. Hafler typically writes checks of $5M – $10M.
What boards does Jason P. Hafler sit on?: Jason P. Hafler holds tracked board seats at Abcuro, Expansion Therapeutics, Matchpoint Therapeutics, Star Therapeutics, Thumbnail for Escient Pharmaceuticals.
Where did Jason P. Hafler go to school?: Jason P. Hafler studied at University of Cambridge (PhD); Bowdoin College; BB&N.