REGN Soars 41% in Six Months: Is There More Upside Potential in 2026?

Core Insights - Regeneron Pharmaceuticals (REGN) has experienced a strong performance over the past six months, with shares rising 41%, significantly outperforming the industry growth of 22.4% [1][9] - The stock reached a 52-week high of $792.77 on December 24, 2025, indicating robust investor sentiment [1][9] Pipeline and Regulatory Developments - Positive developments in Regeneron's pipeline, particularly the FDA approval of Eylea HD for treating macular edema following retinal vein occlusion (RVO), have bolstered investor confidence [5][9] - Eylea HD sales in the U.S. increased by 10% in Q3 2025, driven by higher volumes and demand, which is crucial as Eylea faces competition from Roche's Vabysmo [10][11] Oncology Portfolio Growth - Regeneron's oncology franchise, led by the PD-1 inhibitor Libtayo, generated $1.03 billion in sales during the first nine months of 2025, reflecting a 21% year-over-year increase [13] - Recent label expansions for Libtayo in Europe and the U.S. enhance its market position and support long-term growth in oncology [14][15] - The FDA's accelerated approval of linvoseltamab-gcpt for multiple myeloma and Ordspono for lymphoma further strengthens Regeneron's oncology portfolio [16][17] Dupixent Sales and Market Expansion - Dupixent continues to be a significant revenue driver for Regeneron, with ongoing label expansions contributing to strong sales growth [18][23] - The recent approval for Dupixent to treat chronic spontaneous urticaria in patients aged 12 and above highlights its expanding market potential [19] Financial Performance and Valuation - Regeneron's shares currently trade at a price/earnings ratio of 22.21X forward earnings, higher than its historical mean of 19X and the large-cap pharma industry's average of 19.26X [20] - The bottom-line estimate for 2025 has decreased, while the estimate for 2026 has increased by $1.97, indicating mixed expectations for future performance [21] Strategic Outlook - Regeneron is diversifying its revenue streams through its oncology portfolio and ongoing label expansions for Dupixent, which reduces reliance on any single product [23] - The company is also exploring opportunities in the obesity market, having entered into an in-licensing agreement to expand its pipeline [24] - Recent positive momentum in the pipeline and regulatory developments has improved the overall outlook for Regeneron, making it an attractive investment opportunity [25]