Merck stock rises as Winrevair shows positive results in PAH study

Published 23/06/2025, 14:16
Merck stock rises as Winrevair shows positive results in PAH study

Investing.com - Merck (NYSE:MRK), a prominent player in the pharmaceuticals industry with a market cap of $198.5 billion, saw its stock rise Monday after announcing positive topline results from its Phase 3 HYPERION study evaluating Winrevair for pulmonary arterial hypertension (PAH). According to InvestingPro data, the company maintains strong financial health with a "GREAT" overall score, supported by consistent dividend payments for 55 consecutive years.

The study met its primary endpoint of time to clinical worsening as measured by a composite endpoint including all-cause death, nonplanned PAH-related hospitalization, and other disease progression markers. Winrevair demonstrated a statistically significant and clinically meaningful reduction in the risk of clinical worsening events compared to placebo when added to background therapy.

HYPERION is the third Phase 3 study of Winrevair to show significant efficacy in adults with PAH, following the previously reported STELLAR and ZENITH trials. Unlike those earlier studies that focused primarily on patients receiving triple therapy, HYPERION evaluated patients diagnosed with PAH within the previous 12 months, with 72.2% on double therapy.

The safety profile of Winrevair in the HYPERION trial was generally consistent with observations from previous studies. Merck is currently engaged with regulators regarding the incorporation of both the ZENITH and HYPERION data into the Winrevair label, which the company notes will be important for payers and physicians.

Morgan Stanley (NYSE:MS) maintained an Equalweight rating on Merck with a $99.00 price target following the announcement. Merck previously increased its peak sales guidance for its cardiometabolic franchise to approximately $15 billion from over $10 billion, reflecting increased confidence supported by clinical data for Winrevair and other pipeline products. InvestingPro analysis indicates the stock is currently undervalued, with analysts forecasting EPS of $8.93 for fiscal year 2025. Get access to the complete Merck research report and 8 additional ProTips through InvestingPro's comprehensive analysis platform.

In other recent news, Merck announced significant developments across several areas of its operations. The company reported that its WINREVAIR drug demonstrated a substantial reduction in clinical worsening events for newly diagnosed pulmonary arterial hypertension patients in the Phase 3 HYPERION study. Additionally, the U.S. Food and Drug Administration approved Merck's Keytruda for treating locally advanced head and neck squamous cell carcinoma, marking it as the first perioperative anti-PD-1 treatment for this condition. The approval was based on the Phase 3 KEYNOTE-689 trial results, which showed a 30% reduction in event-free survival events compared to standard care. In the veterinary sector, Merck Animal Health received a positive opinion from the European Medicines Agency for NUMELVI, a canine dermatitis drug, pending final approval by the European Commission. Moreover, Merck has initiated a Phase 3 clinical trial to evaluate its dengue vaccine candidate, enrolling approximately 12,000 children, marking a significant step in its vaccine development program. These recent developments highlight Merck's ongoing efforts in advancing treatments across human and animal health.

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