AstraZeneca or Merck: Which Oncology Giant Has the Edge?

Core Insights - AstraZeneca (AZN) and Merck (MRK) are both leading global pharmaceutical companies with strong oncology portfolios, with oncology driving over 60% of Merck's revenues and around 43% for AstraZeneca [1][2][3] Group 1: Company Performance - Merck's Keytruda generated $23.3 billion in sales in the first nine months of 2025, reflecting an 8% year-over-year increase, and is a key driver of revenue growth [4][9] - AstraZeneca's oncology sales rose 16% in the first nine months of 2025, contributing to its overall revenue growth [2][12] - AstraZeneca aims for $80 billion in revenues by 2030, supported by 20 planned medicine launches, with several new products already contributing to growth [14][30] Group 2: Product Pipeline and Acquisitions - Merck's pipeline has nearly tripled since 2021, with plans to launch around 20 new vaccines and drugs, including Capvaxive and Winrevair, which have strong revenue potential [6][28] - AstraZeneca has launched several new drugs that are performing well, offsetting losses from mature brands, and expects to achieve a mid-30s percentage core operating margin by 2026 [14][16] Group 3: Market Challenges - Both companies face pressures from declining legacy brands and increasing competition, particularly Merck's reliance on Keytruda, which will lose exclusivity in 2028 [10][11][29] - AstraZeneca is dealing with generic competition affecting key drugs and challenges related to U.S. oncology sales due to policy changes [16][17] Group 4: Financial Estimates and Valuation - The Zacks Consensus Estimate for AstraZeneca's 2025 sales and EPS indicates an 8.7% and 11.9% year-over-year increase, respectively [18] - Merck's 2025 sales and EPS estimates imply a 1.0% and 17.4% year-over-year increase, respectively, with recent EPS estimates showing a slight increase [20][21] - AstraZeneca's stock has risen 42.5% year-to-date, outperforming the industry, while Merck's stock has increased by 5.2% [22][24] Group 5: Dividend and Valuation Comparison - AstraZeneca's dividend yield is 1.08%, while Merck's is higher at 3.1%, indicating a more attractive income for Merck [25] - From a valuation perspective, AstraZeneca trades at a higher price/earnings ratio of 18.28 compared to Merck's 11.85, suggesting Merck may be undervalued [24]