Guillaume Pfefer

Guillaume Pfefer serves as CEO Partner at Flagship Pioneering. Flagship Pioneering operates in the research sector with approximately 720.0 employees. The company is headquartered in Boston, Massachusetts. Flagship Pioneering generates annual revenue of 800000000.0. To date, Flagship Pioneering has raised 8909000000.0 in total funding, with the most recent round being Other.

Industry & Role Insights

• • MessageCEO tracks 2,961 executives in the research sector.
• • We have verified contacts for 9 executives at Flagship Pioneering.
• • 3,781 executive contacts are available in Massachusetts.
• • Our database includes 201,469 c suite-level executives.

Outlook Microsoft Office 365 Salesforce Nginx Cloudinary Greenhouse.io Mobile Friendly Google Font API Vimeo Linkedin Marketing Solutions Google Tag Manager Typekit MailChimp YouTube Google Analytics SoundCloud AI Remote

life sciences biotech therapeutics diagnostics sustainability climate change artificial intelligence machine learning agtech medicines biology entrepreneurship biotechnology science innovation ventures biotechnology research drug development bioplatforms innovative therapeutics healthcare solutions preemptive medicine ai in healthcare strategic partnerships clinical trials therapeutic areas disease prevention patient health health security collaborative research biomedical innovation genetic medicine cystic fibrosis treatments metabolic diseases obesity management cancer diagnostics early detection personalized medicine drug discovery biotechnology ecosystems healthcare transformation patentable innovations therapeutic pipelines novel modalities strategic collaborations drug approvals health outcomes vaccine development chronic disease management scientific discovery r&d partnerships biotech growth human health innovations research collaborations ai-powered drug discovery novel drug platforms healthcare sustainability global engagement emerging biotherapies patient-centric therapies clinical pharmacology venture capital company creation innovative platforms health transformation biopharmaceutical partnerships pioneering medicines scientific ventures creative culture entrepreneurial leadership unmet medical needs novel therapies research & development health innovation patient-centric solutions capital deployment ecosystem of companies collaborative partnerships transformative science bold thinking rigorous science societal good pioneering technologies investment in health biotechnology innovation first-in-category companies environmental services renewables & environment information technology & services health care health wellness & fitness hospital & health care

TP

Theo Proukou Chief HR Officer and Executive Partner at Flagship Pioneering

TK

Tilman Kispersky Senior Director, Strategic Initiatives, Office of the CEO at Flagship Pioneering

GF

Gary Fortin VP, Head of Operations | Origination OPM (Operations, Planning, Management) | Acting COO at FL87 at Flagship Pioneering

PO

Paul Owen CEO Partner at Flagship Pioneering

AG

Amy Gutman Executive Writer, Office of the CEO at Flagship Pioneering

Outreach Guidance — research Sector

Executives like Guillaume Pfefer in the research sector receive targeted outreach from sales teams, recruiters, and investors. To stand out, personalize your message with industry-specific context and a clear, specific value proposition relevant to their role at Flagship Pioneering.

Guillaume Pfefer's Position in the MessageCEO Database

• •Guillaume Pfefer is 1 of 9 verified executive contacts we track at Flagship Pioneering.
• •2,871 verified executive contacts in research are in the MessageCEO database.
• •3,577 verified executive contacts in Massachusetts are in the database.
• •21 verified contacts work at research companies in the 720.0 employee range (same size as Flagship Pioneering).

Executive contact data compiled from public business filings, LinkedIn public profiles, company press materials, and verified outbound email testing. We do not publish personal addresses or sensitive identifiers. Methodology & sources · Removal requests handled at /remove-info · Updated May 2026.

How do I reach Guillaume Pfefer directly?

Guillaume Pfefer's verified email address is available to MessageCEO Pro subscribers. They currently serve as CEO Partner at Flagship Pioneering. Access direct contact info to skip gatekeepers and reach the decision maker.

What company does Guillaume Pfefer work for?

Guillaume Pfefer is CEO Partner at Flagship Pioneering, a company in the research sector with 720.0 employees. The company is based in Boston, Massachusetts.

Can I pitch or sell to Guillaume Pfefer?

As CEO Partner at Flagship Pioneering, Guillaume Pfefer is a key decision-maker in the research sector. MessageCEO Pro gives you verified email to reach Guillaume Pfefer directly — ideal for B2B sales, partnerships, and executive recruiting.

What industry is Guillaume Pfefer in?

Guillaume Pfefer works in the research industry as CEO Partner at Flagship Pioneering. MessageCEO provides verified contact information for executives across all major industries.

Is Guillaume Pfefer's contact information verified?

Yes. MessageCEO verifies executive contact information through multiple data sources and regular validation checks. Guillaume Pfefer's profile is kept up-to-date with the latest available information.

Last updated: May 28, 2026