October 7, 2025--RAHWAY, N.J.--(BUSINESS WIRE)-- Merck (NYSE: MRK), known as MSD outside of the United States and Canada, today announced the completion of the Verona Pharma plc (Nasdaq: VRNA) (“Verona Pharma”) acquisition. Verona Pharma is now a wholly-owned subsidiary of Merck and the American Depositary Shares (ADS) of Verona Pharma will no longer be listed or traded on the Nasdaq Global Market.
“The Verona Pharma acquisition strengthens and complements our portfolio of treatments for patients with cardio-pulmonary diseases to include Ohtuvayre, while delivering near and long-term growth as well as value for shareholders,” said Robert M. Davis, chairman and chief executive officer, Merck. “The addition of Ohtuvayre is another strong example of our business development strategy, which focuses on opportunities where compelling science and value align. Ohtuvayre is a novel, first-in-class maintenance treatment targeting an important unmet need for adult patients with COPD. We look forward to applying our commercial capabilities and working with our talented new colleagues from Verona Pharma to build on the strong uptake and performance to date to reach even more patients with this important medicine.”
Through this acquisition Merck has added Ohtuvayre (ensifentrine), a first-in-class selective dual inhibitor of phosphodiesterase 3 and 4 (PDE3 and PDE4), to its growing cardio-pulmonary pipeline and portfolio. The U.S. Food and Drug Administration approved Ohtuvayre in June 2024 for the maintenance treatment of chronic obstructive pulmonary disease (COPD) in adult patients. Ohtuvayre is the first novel inhaled mechanism for the maintenance treatment of COPD in more than 20 years and combines bronchodilator and non-steroidal anti-inflammatory effects. Ohtuvayre is also being evaluated in clinical trials for the treatment of non-cystic fibrosis bronchiectasis.
Additional Transaction Details
Under the terms of the acquisition agreement, Merck, through a subsidiary, has acquired all outstanding shares of Verona Pharma for $107 per ADS, each of which represents eight Verona Pharma ordinary shares, for a total transaction value of approximately $10 billion.
As previously disclosed, the acquisition will result in the capitalization of most of the purchase price as an intangible asset for Ohtuvayre (which will be amortized as a GAAP-only charge over the life of the product). The transaction is expected to negatively impact non-GAAP EPS by approximately $0.16 in the first 12 months, representing costs associated with financing the transaction partially offset by Ohtuvayre performance.
About Chronic Obstructive Pulmonary Disease (COPD)
Chronic obstructive pulmonary disease (COPD) is a progressive respiratory condition that causes restricted airflow and breathing problems. Emphysema and chronic bronchitis are the two most common types of COPD. Common symptoms of COPD include shortness of breath, an ongoing cough or a cough that produces a lot of mucus, wheezing, chest tightness or heaviness and fatigue. Smoking and air pollution are the most common causes of COPD. More than 390 million people were estimated to be suffering from COPD worldwide as of 2019 and COPD is the fourth leading cause of death worldwide. There is no cure for COPD.
About Ohtuvayre® (ensifentrine)
Ohtuvayre is the first inhaled therapy for the maintenance treatment of adults with COPD that combines bronchodilator and non-steroidal anti-inflammatory activities in one molecule. Verona has evaluated nebulized Ohtuvayre in its Phase 3 clinical program ENHANCE (“Ensifentrine as a Novel inHAled Nebulized COPD thErapy”) for COPD maintenance treatment. Ohtuvayre met the primary endpoint in both ENHANCE-1 and ENHANCE-2, demonstrating statistically significant and clinically meaningful improvements in lung function. A fixed-dose combination of ensifentrine and glycopyrrolate, a LAMA, is currently under development for the maintenance treatment of COPD.
About Merck
At Merck, known as MSD outside of the United States and Canada, we are unified around our purpose: We use the power of leading-edge science to save and improve lives around the world. For more than 130 years, we have brought hope to humanity through the development of important medicines and vaccines. We aspire to be the premier research-intensive biopharmaceutical company in the world – and today, we are at the forefront of research to deliver innovative health solutions that advance the prevention and treatment of diseases in people and animals. We foster a diverse and inclusive global workforce and operate responsibly every day to enable a safe, sustainable and healthy future for all people and communities.