Merck's Non-Oncology Drugs Q4 Performance: What to Expect

Core Insights - Merck is set to report its Q4 and full-year 2025 results on February 3, with a focus on the sales performance of its cancer drug Keytruda, which accounted for over 50% of pharmaceutical sales in the first nine months of 2025 [2][11] - Keytruda's sales increased by 8% year over year in Q3 2025, but were below expectations, prompting attention on Merck's non-oncology drugs, particularly Capvaxive and Winrevair, which are expected to drive long-term growth [3][5] Sales Performance - Keytruda's sales performance is critical, with a noted increase of 8% year over year in Q3 2025, but weaker than anticipated [3] - Capvaxive and Winrevair have shown strong sales, with Capvaxive generating $480 million and Winrevair $976 million in the first nine months of 2025 [5][11] - The Animal Health business is also contributing to top-line growth, with expected revenue increases in Q4 [6] Product Approvals and Market Competition - Capvaxive was approved in the U.S. in June 2024 and in the EU in March 2025, while Winrevair was approved for PAH treatment in 2024 [4] - Enflonsia, a new RSV antibody, recorded sales of $79 million in Q3 2025, with its performance in Q4 still uncertain as it moves into broader clinical use [7] - Winrevair faces competition in the PAH market from United Therapeutics and Johnson & Johnson, while Enflonsia competes with AstraZeneca/Sanofi's Beyfortus [8][10] Financial Performance and Valuation - Merck's shares have increased by 30.6% over the past six months, outperforming the industry and the S&P 500 [13] - The company's price/earnings ratio stands at 15.61, which is lower than the industry average of 18.36 but higher than its 5-year mean of 12.48 [14] - The Zacks Consensus Estimate for 2025 earnings per share has slightly decreased from $8.98 to $8.95, and for 2026 from $8.81 to $6.94 over the past 60 days [15]