AMGN vs PFE: How Amgen and Pfizer Compare (2026)

Same yardstick, side by side (as of July 2026). Valuation lined up like this is most meaningful for two names in the same corner of the market, which these are. Figures are approximate; verify before investing.

Reading it: PFE is the cheaper of the two on forward earnings, but cheaper is not the same as better. Pair the valuation with growth (how far the forward P/E sits below the trailing P/E) and risk (beta) before you decide.

The metrics above tell you which is the marginally better business. The bigger risk for most people is not picking the slightly worse stock, it is over-concentrating. AMGN and PFE share themes, so owning both, or adding either to what you already hold, can quietly push a large share of your portfolio into one bet.

This is the part a generic comparison page cannot answer, because it depends on what you own. Connect your brokerage and Walnut shows your real, combined AMGN and PFE exposure, flags overlap with your existing positions, and tells you if adding one would tip you past a concentration you are comfortable with, read-only by default, with your login staying at your broker. Walnut is not an investment adviser.

Amgen (AMGN) is one of the world's largest biotechnology companies, developing, manufacturing, and selling human therapeutics primarily for serious illnesses. Its portfolio spans inflammation, oncology, cardiovascular disease, bone health, and rare diseases, with well-known products that have included Enbrel, Prolia and Xgeva, Repatha, Otezla, and a growing pipeline. Amgen pioneered large-scale recombinant-protein and antibody manufacturing and is a leader in biosimilars as older biologics lose patent protection. The 2023 acquisition of Horizon Therapeutics added rare-disease drugs such as Tepezza and Krystexxa. Amgen is also developing obesity and metabolic candidates, including investigational drugs in the GLP-1 class of weight-loss therapies. Headquartered in Thousand Oaks, California, and founded in 1980, Amgen is a member of the Dow Jones Industrial Average and returns substantial cash to shareholders through a growing dividend and buybacks.

Full AMGN guide

Pfizer is one of the world's largest pharmaceutical companies, developing, manufacturing, and selling prescription medicines and vaccines across many therapeutic areas. Its portfolio spans oncology (a strategic priority, expanded sharply by the acquisition of cancer drugmaker Seagen), vaccines (including pneumococcal franchise Prevnar and its COVID-19 vaccine Comirnaty, partnered with BioNTech), internal medicine and cardiology (such as the Vyndaqel/Vyndamax family and Eliquis, co-marketed with Bristol Myers Squibb), immunology and inflammation, and antivirals (including the COVID treatment Paxlovid). Pfizer makes money selling these drugs to wholesalers, pharmacies, hospitals, and governments worldwide. The company saw an enormous revenue surge from COVID-19 products during the pandemic, then a steep decline as that demand normalized, leaving it to refill growth through its pipeline, oncology expansion, and acquisitions while a wave of patent expirations looms later this decade. Founded in 1849 and headquartered in New York City, Pfizer is a mature, dividend-paying large-cap navigating a post-COVID reset.

Full PFE guide

Both fit overlapping themes, but they are not interchangeable. The useful comparison is which set of drivers and risks you want exposure to.

• AMGN drivers: Rare disease and Horizon assets; Obesity and metabolic pipeline.
• PFE drivers: Oncology expansion via Seagen; Broad, diversified portfolio.

A faster-growing, richer-valued name usually swings harder, so it suits a longer horizon and a higher tolerance for volatility; a steadier, more cash-generative business suits a more conservative or income-minded investor. The honest test is which set of risks you could hold through a drawdown: Amgen faces patent cliffs as older blockbusters lose exclusivity, exposing them to biosimilar competition and pricing pressure. For PFE, pfizer faces a significant patent cliff later this decade, with several major products losing exclusivity, pressuring revenue unless the pipeline and acquisitions fill the gap.

Growth-minded investors who believe the theme has years to run tend to accept the richer multiple for more upside; value-minded investors lean toward the cheaper forward earnings and steadier profile. Pick AMGN if you believe its drivers more; PFE if you believe its. Many investors hold both, but since they share themes, that is a concentrated bet, not diversification. Decide deliberately and check overlap. For the full detail, see the AMGN and PFE guides.

AMGN. Amgen trades at a moderate multiple typical of a mature large-cap biopharma, reflecting steady cash flow and a meaningful dividend balanced against patent-cliff and drug-pricing risk. The valuation embeds expectations for the rare-disease and obesity pipelines to offset declines in older franchises. All figures are approximate and move with the share price and reported results; verify current numbers before relying on them.

PFE. Pfizer trades at a below-market multiple and a high dividend yield, reflecting investor concern about the post-COVID revenue reset and a looming patent cliff. Its valuation balances substantial cash generation and diversification against questions over whether the pipeline and Seagen-led oncology push can restore durable growth.

Headline figures (approximate, early 2026): AMGN shows revenue (ttm) ~$33-35 billion (approximate, verify), operating margin ~30%+ (approximate, verify), p/e (ttm) ~20-25x (GAAP varies; approximate, verify), dividend yield ~3% (approximate, verify); PFE shows revenue (ttm) ~$60 billion, operating margin ~25%, recovering post-COVID normalization, net income (ttm) multi-billion, variable with COVID product swings, dividend yield ~6%, high for large-cap pharma.

AMGN and PFE are related but distinct: same themes, different businesses and risks. Neither wins in the abstract; the right pick is whichever thesis you actually believe, sized so you are not over-concentrated in one theme. Walnut can show your combined AMGN and PFE exposure against your real portfolio. It is not an investment adviser.