Research Sites

Main Research and Development Centers

Each of our R&D centers specializes in a different area of scientific exploration. We have several major campuses located throughout the U.S. and U.K.

Andover, Massachusetts

Combining state-of-the-art R&D and Pfizer Global Supply (PGS) facilities with flexible, multi-product manufacturing capabilities, Andover is a key driver of innovation across our biologics discovery, development, and global clinical and commercial supply efforts.

Bothell, WA

Utilizing advanced laboratories and equipment, researchers in Bothell are dedicated to revolutionizing cancer treatment.

Cambridge research site building with orange facades, central courtyard, and glass skybridge

Cambridge, Massachusetts

Located in Kendall Square, our Cambridge site interlaces Pfizer’s R&D capability with the densest biomedical community in the world.

Groton, Connecticut

Many of the discoveries and innovations that drive the Pfizer pipeline to new potential occur in the world-class research and development laboratories in Groton.

Aerial view of a large Pfizer office complex surrounded by trees and winding roads

San Diego, CA

With more than 500,000 square feet of state-of-the-art facilities, this is where our scientists discover and develop cutting-edge cancer therapies using advanced laboratories and equipment.

Pearl River, New York

As the global hub for Pfizer Vaccine Research and Development, our Pearl River colleagues have developed and manufactured vaccines and other medicines for more than a century.

St. Louis, MO

An expansive laboratory and manufacturing space, our colleagues focus on the development of potential new medicines to help prevent or treat diseases and conditions.

Pipeline Snapshot as of November 3, 2026

Explore the Product Pipeline Download Complete Pipeline PDF

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Clinical Trials

Learn more about the process of joining a clinical trial and find a trial near you.

Go to Pfizer Clinical Trials Site

Set Point Theory: Why the Body Fights to Regain Lost Weight

Obesity is a complex, chronic disease. Managing obesity isn’t just about losing weight—it’s also about keeping it off. That’s a difficult prospect for many, but not because of a lack of discipline. The body is biologically designed to resist sustained weight loss.