Buy, Sell or Hold MRK Stock: Key Factors to Watch Before Q4 Earnings

Core Viewpoint - Merck is expected to report its Q4 and full-year 2025 earnings on February 3, with a consensus estimate of $16.19 billion in sales and $2.04 per share in earnings, but earnings estimates for 2026 have declined significantly due to costs from recent M&A activities [1][7][34] Financial Performance - Merck has consistently exceeded earnings expectations in the past four quarters, with an average earnings surprise of 5.08% and a notable 9.32% surprise in the last quarter [3][34] - The company currently has an Earnings ESP of +0.33% and a Zacks Rank of 4 (Sell) [4] Factors Influencing Upcoming Results - Q4 growth is anticipated from Keytruda, Animal Health, and new drugs, although this may be offset by weaker performance from Gardasil and M&A-related costs [7][34] - Keytruda sales are projected to reach $8.31 billion, driven by strong uptake in early-stage indications and metastatic indications [9][34] - The HPV vaccine Gardasil is expected to see lower sales, particularly in China and Japan, with estimates at $1.04 billion [13][34] - The Animal Health segment is estimated to generate $1.48 billion, with mixed performance in livestock and companion animal products [17][34] Strategic Initiatives - Merck has been active in acquisitions, including Cidara Therapeutics for $9.2 billion and Verona Pharma for around $10 billion, aimed at bolstering its pipeline ahead of Keytruda's patent expiration in 2028 [28][30] - The company is positioned to launch approximately 20 new vaccines and drugs in the coming years, with several having blockbuster potential [27][34] Market Position and Valuation - Merck's stock has increased by 9.4% over the past year, underperforming the industry average of 16.1% [20][34] - The company's shares trade at a forward P/E ratio of 15.62, lower than the industry average of 18.18, but above its five-year mean of 12.48 [23][34] Investment Considerations - While Keytruda remains a significant revenue driver, there are concerns about Merck's reliance on this drug and its ability to diversify its product lineup [31][34] - Short-term investors may be cautious due to challenges such as Gardasil's performance, potential competition for Keytruda, and rising pressures from generics [34]