PFIZER REPORTS FOURTH-QUARTER AND FULL-YEAR 2020 …

1 PFIZER REPORTS FOURTH-QUARTER AND FULL-YEAR 2020 RESULTS. AND RELEASES 5- year PIPELINE METRICS. Upjohn Business(1) Now Accounted for as a Discontinued Operation for All Periods Presented, Excluded from Adjusted(2) Results FULL-YEAR 2020 Revenues of $ Billion, Which Now Exclude Upjohn(1), Reflect 3% Operational Growth;. When the Impact from Consumer Healthcare(1) and the $154 Million of Sales of BNT162b2 are Excluded, FULL-YEAR 2020 Revenues Grew 8% Operationally Operational Growth Primarily Driven by Strong Performances from Vyndaqel/Vyndamax, Eliquis, Oncology Biosimilars, Ibrance, Prevenar 13 Outside of the , Inlyta, Xeljanz and Xtandi FOURTH-QUARTER 2020 Revenues of $ Billion, Reflecting 11% Operational Growth; Excluding Sales of BNT162b2, Revenues Grew 9% Operationally FULL-YEAR 2020 Reported Diluted EPS(3) of $ , Adjusted Diluted EPS(2) of $ ; FOURTH-QUARTER 2020.

2 Reported Diluted EPS(3) of $ , Adjusted Diluted EPS(2) of $ Raises FULL-YEAR 2021 Guidance(4) for Adjusted Diluted EPS(2) to a range of $ $ and Provides 2021. Financial Guidance(4) for Other Adjusted(2) Income Statement Line Items Achieved Clinical Trial Success Rates of 48% in Phase 1, 52% in Phase 2, 85% in Phase 3 and an End-to-End Clinical Success Rate of 21%, All of Which Exceeded the Industry Averages(5). NEW YORK, NY, Tuesday, February 2, 2021 PFIZER Inc. (NYSE: PFE) reported financial results for fourth - quarter 2020 and FULL-YEAR 2020, raised 2021 guidance(4) for Adjusted diluted EPS(2) and provided 2021 financial guidance(4) for other Adjusted(2) income statement line items, including details regarding the expected contributions to 2021 performance from BNT162b2, the PFIZER -BioNTech SE (BioNTech) COVID-19 vaccine.

3 EXECUTIVE COMMENTARY. Dr. Albert Bourla, Chairman and Chief Executive Officer, stated: 2020 has been a transformational year , not only for PFIZER , but also in the life of every patient in every community that we serve. As a company, we saw the culmination of PFIZER 's decade-long conversion into a pure-play, science and innovation-focused company. Right away, our ability to move quickly and utilize cutting-edge science to help address the world's most important medical challenges was put to the test by the COVID-19 pandemic. Our record-breaking success at developing a vaccine against COVID-19, along with our partner BioNTech, is just one example of what we believe this new PFIZER is capable of achieving. As the world looks forward to 2021 with renewed hope for better days ahead, we also look forward with renewed confidence and resolve in our ability to fulfill our purpose, to deliver breakthroughs that change patients' lives.

4 -1- Frank D'Amelio, Chief Financial Officer and Executive Vice President, Global Supply, stated: I am very pleased with how our company performed in 2020, and particularly in the fourth quarter , where we achieved double digit operational revenue growth driven by a wide range of products and geographies, including growth within all of our therapeutic areas. I was also pleased that PFIZER completed the transaction to combine Upjohn with Mylan to form Viatris in the fourth quarter , which I believe positions both PFIZER and Viatris for a bright future. I feel confident in our ability to continue to perform well and deliver on our commitments in 2021 and beyond, both to our patients and to our shareholders.. Results for the fourth quarter and FULL-YEAR 2020 and 2019(6) are summarized below.

5 OVERALL RESULTS. ($ in millions, except per share amounts) FOURTH-QUARTER FULL-YEAR 2020 2019 Change 2020 2019 Change Revenues $ 11,684 $ 10,449 12% $ 41,908 $ 41,172 2%. Reported Net Income/(Loss)(3) 594 (337) * 9,616 16,273 (41%). Reported Diluted EPS/(LPS)(3) ( ) * (40%). Adjusted Income(2) 2,366 2,055 15% 12,506 10,817 16%. Adjusted Diluted EPS(2) 14% 16%. * Indicates calculation not meaningful. REVENUES. ($ in millions) FOURTH-QUARTER FULL-YEAR % Change % Change 2020 2019 2020 2019. Total Oper. Total Oper. Internal Medicine $ 2,308 $ 2,282 1% 1% $ 9,003 $ 8,790 2% 3%. Oncology 3,024 2,466 23% 21% 10,867 9,014 21% 21%. Hospital 2,220 2,056 8% 7% 7,961 7,772 2% 3%. Vaccines 2,001 1,708 17% 16% 6,575 6,504 1% 2%. Inflammation & Immunology 1,267 1,251 1% 4,567 4,733 (4%) (3%). Rare Disease 865 686 26% 24% 2,936 2,278 29% 29%.

6 Biopharmaceutical Products $ 11,684 $ 10,449 12% 11% $ 41,908 $ 39,090 7% 8%. Consumer Healthcare(1) Products 2,082 (100%) (100%). Total Revenue $ 11,684 $ 10,449 12% 11% $ 41,908 $ 41,172 2% 3%. Revenues and expenses associated with the Upjohn Business(1) for all periods presented have been recategorized as discontinued operations and excluded from Adjusted(2) results. PFIZER 's Meridian subsidiary, the manufacturer of EpiPen and other auto-injector products, which had been reported within the results of the Upjohn Business(1), is now included within the Hospital therapeutic area for all periods presented. -2- Following the completion of the spin-off of the Upjohn Business(1) in the fourth quarter of 2020, we now operate as a single focused innovative biopharmaceutical company engaged in the discovery, development, manufacturing, marketing, sales and distribution of biopharmaceutical products worldwide.

7 Acquisitions and other business development activities completed in 2019 and 2020 impacted financial results in the periods presented(1). Some amounts in this press release may not add due to rounding. All percentages have been calculated using unrounded amounts. References to operational variances pertain to period-over-period growth rates that exclude the impact of foreign exchange rates(7). 2021 FINANCIAL GUIDANCE(4)(8). Financial guidance reflects management's current expectations for operational performance, foreign exchange rates as well as management's current projections as to the severity, duration and global macroeconomic impact of the COVID-19 pandemic. Key guidance assumptions included in these projections broadly reflect a continued recovery in macroeconomic and healthcare activity throughout 2021 as more of the population becomes vaccinated against COVID-19.

8 These assumptions are guided by the trajectory of current infection rates in many parts of the world and the expected timeline for broad access to effective vaccines. PFIZER raised its guidance range for Adjusted Diluted EPS(2) provided on January 12, 2021 due primarily to additional refinements of its COVID-19 vaccine revenue forecast and is providing for the first time 2021 financial guidance for other income statement line items. Current 2021 financial guidance is presented below. Revenues $ to $ billion Adjusted Cost of Sales(2) as a Percentage of Revenues to Adjusted SI&A Expenses(2) $ to $ billion Adjusted R&D Expenses(2) $ to $ billion Adjusted Other (Income)/Deductions(2) Approximately $ billion of income Effective Tax Rate on Adjusted Income(2) Approximately $ to $ Adjusted Diluted EPS(2).

9 (previously $ to $ ). The midpoint of the guidance range for revenues represents 44% growth from 2020 revenues, including an expected $ billion, or 3%, favorable impact from changes in foreign exchange rates. The midpoint of the updated guidance range for Adjusted diluted EPS(2) reflects a 42% increase over 2020 actual results, including an -3- expected $ , or 4%, benefit due to favorable changes in foreign exchange rates. Financial guidance for Adjusted diluted EPS(2) is calculated using approximately billion weighted average shares outstanding, and does not currently assume any share repurchases in 2021. Assumptions Related to BNT162b2 Within Guidance Given the significant impact that BNT162b2 is expected to have on the company's overall results in 2021, PFIZER is providing additional details on the revenue and margin assumptions incorporated within the above guidance ranges.

10 These assumptions are summarized below. Revenues for BNT162b2 Approximately $15 billion Adjusted Income(2) Before Tax (IBT). High-20s as a Percentage of Revenues Margin for BNT162b2. The BNT162b2 revenue projection incorporated within PFIZER 's 2021 financial guidance primarily includes doses that are expected to be delivered in 2021 under existing contracts, and may be adjusted in the future as additional contracts are executed. Adjusted(2) IBT margin guidance for BNT162b2 incorporates the current expectation for revenues for the product, less anticipated Adjusted(2) costs to manufacture, market and distribute BNT162b2, including applicable royalty expenses and a 50% gross margin split with BioNTech, as well as shared R&D expenses related to BNT162b2. and costs associated with other assets currently in development for the prevention and treatment of COVID-19.