REGN Loses 21.1% Year to Date: Buy, Sell or Hold the Sock?

Core Insights - Regeneron Pharmaceuticals (REGN) shares have declined by 21.1% year-to-date, underperforming the industry growth of 5.2% and the S&P 500 Index [1][8] - The lead drug Eylea has faced significant sales pressure due to competition from Roche's Vabysmo, impacting investor sentiment [2][6] - Despite challenges, Regeneron's oncology portfolio shows promise with recent approvals and strong sales growth in certain products [8][14] Company Performance - Eylea, the primary revenue driver, has seen declining sales due to competition, although Eylea HD sales in the U.S. increased by 29% in Q2 2025 [5][6] - The FDA has extended the review periods for Eylea HD submissions to Q4 2025, causing further uncertainty [7][10] - Dupixent continues to perform well, contributing positively to Regeneron's top line, with recent label expansions expected to drive sales growth [12][13] Oncology Portfolio - Regeneron's oncology franchise, including Libtayo, has shown strong performance with sales of $661.6 million in the first half of 2025, up 18% year-over-year [14] - Recent FDA approvals for Lynozyfic and Ordspono enhance the oncology portfolio, although Ordspono faced a setback with a complete response letter from the FDA [16][17] - The company is actively expanding its oncology pipeline, which is expected to diversify revenue sources [25] Future Outlook - Regeneron is exploring opportunities in the obesity market through a licensing agreement with Hansoh Pharmaceuticals, which could enhance its clinical-stage portfolio [19] - The company is also developing investigational allergen-blocking antibodies, with positive results from phase III studies [20] - Current valuation metrics indicate that REGN shares are trading at a price/earnings ratio of 17.87X forward earnings, higher than the large-cap pharma industry average [21] Challenges - Pipeline setbacks, particularly related to the mixed results from late-stage studies on itepekimab, pose risks to the company's near-term outlook [26] - The transition from Eylea to Eylea HD is expected to take time, creating additional pressure on the stock [25][27]