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Lilly Up 18% in a Month: Should You Buy, Sell or Hold the Stock?

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Lilly Up 18% in a Month: Should You Buy, Sell or Hold the Stock?

Eli Lilly's stock climbed 18% over the past month, driven by robust third-quarter results, a significant increase in its 2025 revenue and EPS guidance to $63.0-$63.5 billion and $23.00-$23.70 respectively, and a deal securing Medicare access for its GLP-1 therapies. The company's GLP-1 drugs, Mounjaro and Zepbound, were primary growth drivers, accounting for over 50% of revenue with triple-digit sales increases. Despite an expensive valuation and intensifying competition in the burgeoning $100 billion obesity market, Lilly is strategically expanding its pipeline with oral GLP-1 candidates and diversifying through M&A in areas like oncology and neuroscience, contributing to a bullish analyst sentiment.

Analysis

Eli Lilly (LLY) shares have surged 18% over the past month and 25.2% year-to-date, significantly outperforming the industry's 6.3% increase. This robust performance is primarily driven by stellar third-quarter results, a second upward revision of 2025 guidance to $63.0-$63.5 billion in revenue and $23.00-$23.70 in EPS, and a strategic deal with the Trump administration securing Medicare access for GLP-1 therapies and a three-year tariff exemption. Key GLP-1 drugs, Mounjaro and Zepbound, are central to this growth, contributing over 50% of total revenues with Q3 sales up 109% and 185% year-over-year, respectively. Lilly is strategically expanding its pipeline and diversifying its portfolio beyond its dominant GLP-1 franchise. The company is advancing late-stage oral GLP-1 candidate orforglipron, with regulatory filings for obesity anticipated later this year for a potential 2025 launch, offering a more convenient alternative to injectables. Concurrently, Lilly has engaged in several M&A deals in 2025, acquiring assets in cardiovascular, oncology, and neuroscience, such as Adverum Biotechnologies for its gene therapy Ixo-vec, to broaden its therapeutic reach. Despite a premium valuation, with LLY trading at 31.62x forward earnings compared to the industry's 15.57x, the stock remains below its 5-year mean of 34.54x. The burgeoning $100 billion obesity market by 2030 presents both immense opportunity and intensifying competition from rivals like Novo Nordisk, Amgen, and Viking Therapeutics. However, consistently rising analyst consensus estimates for 2025 and 2026 EPS underscore a bullish sentiment regarding Lilly's sustained growth trajectory and pipeline strength.