PFIZER INC

We manage our commercial operations through a global structure consisting of three operating segments, each led by a single manager: Biopharma, PC1 and Pfizer Ignite. Biopharma, our innovative science-based biopharmaceutical business, is engaged in the discovery, development, manufacture, marketing, sale and distribution of biopharmaceutical products worldwide. PC1 is our contract development and manufacturing organization and a leading supplier of specialty active pharmaceutical ingredients. Pfizer Ignite is an offering that provides strategic guidance and end-to-end R&D services to select innovative biotech companies that align with our R&D focus areas. In 2025, Pfizer made the decision to discontinue Pfizer Ignite and we are winding down this business while collaborating closely with our Ignite partners to ensure continuity and the successful transition of work. Biopharma is the only reportable segment.

Within our Biopharma reportable segment, our commercial divisions market, sell and distribute our products, and global operating functions are responsible for the research, development, manufacturing and supply of our products. The commercial structure within our Biopharma reportable segment in 2025 was composed of the Pfizer U.S. Commercial Division, which focused on the commercialization of Pfizer’s entire product portfolio in the U.S., and the Pfizer International Commercial Division, which focused on the commercialization of Pfizer’s entire product portfolio in all international markets.

As part of our continued focus on commercial execution, at the beginning of 2026, we made changes in our commercial structure, which included the transition of certain off-patent branded and generic sterile injectables and biosimilars from the Specialty Care and Oncology product portfolios to a new Global Hospital and Biosimilars organization within our Biopharma reportable segment. Effective January 1, 2026, the commercial structure within our Biopharma reportable segment is as follows:

Customer groups and select products within the Biopharma product portfolio in 2026 include:

•Primary Care:

◦Internal medicine product portfolio including in cardiovascular metabolic diseases – select products include: Eliquis, as well as other brands that have experienced patent-based expirations or loss of regulatory exclusivity.

◦Migraine product portfolio: Nurtec ODT/Vydura and Zavzpret.

◦Vaccines product portfolio across all ages – select products include: the Prevnar family, Comirnaty, Abrysvo, FSME/IMMUN-TicoVac, Nimenrix and Trumenba.

◦Treatment for COVID-19: Paxlovid.

•Specialty Care:

◦Inflammation & immunology product portfolio – select products include: Xeljanz, Enbrel (outside the U.S. and Canada), Cibinqo, Litfulo, Eucrisa and Velsipity.

◦Rare disease product portfolio for a number of therapeutic areas with rare diseases, including amyloidosis, hemophilia and endocrine diseases – select products include: the Vyndaqel family, Genotropin, BeneFIX, Xyntha, Somavert, Ngenla and Hympavzi.

◦Certain anti-infective and immunoglobulin medicines – select products include: Zavicefta (outside the U.S. and Canada), Octagam and Panzyga.

•Oncology:

◦Innovative oncology product portfolio of ADCs, small molecules, bispecifics and other immunotherapies that treat a wide range of cancers including certain types of breast cancer, genitourinary cancer and hematologic malignancies, as well as certain types of melanoma, gastrointestinal, gynecological and lung cancer – select products include: Ibrance, Xtandi, Padcev, Adcetris, Inlyta, Lorbrena, Bosulif, Tukysa, Braftovi, Mektovi, Orgovyx, Elrexfio, Tivdak and Talzenna.

•Hospital and Biosimilars:

◦Product portfolio of off-patent branded and generic sterile injectables, oncology biosimilars and biosimilars for chronic immune and inflammatory diseases – select products include: Biosimilars – Inflectra, Oncology biosimilars such as Retacrit, Ruxience, Zirabev, Trazimera and Nivestym, and other biosimilars; and Sterile Injectables – Sulperazon (outside the U.S. and Canada), Atgam, Fragmin, Solu Medrol, Solu Cortef and Bicillin.

For additional information on our operating segments and products, including product revenues, see Note 17, and for additional information on the key operational revenue drivers of our business, see the Analysis of the Consolidated Statements of Operations section within MD&A. For a discussion of the risks associated with our dependence on certain of our major products, see the Item 1A. Risk Factors—Concentration section.