About us
Our mission is simple: support our people, collaborate with our partners, deliver innovative health solutions and do it all for our patients and populations
If you were born in the UK or own an animal, chances are that MSD is already part of your life through one of our vaccines or medicines
Who we are
We are unified around our purpose
In the United States and Canada, we are known as Merck & Co., Inc., Rahway, N.J., USA, everywhere else we are known as MSD. Although we have two names globally, we are one company with one purpose.
Here in the UK, we’re helping to transform the lives of millions of patients and populations by providing innovative medicines, vaccines and services, through our partnerships with the NHS and the work of the inspiring people who make up our company.
Our people embrace the spirit of invention
Everything we do, in and out of the laboratory, is based on our deep appreciation for life and no matter our role or title, we all rise to the challenge in pursuit of better health outcomes.
Our values represent the very core of our character. They guide every decision and action we take.
We are a Top Employer
We’re proud to have been officially certified by the Top Employer Institute and been awarded the exclusive
Top Employer United Kingdom Certification for the eighth year running.
As an employer of 1,500 people in the UK, we believe that our employees are our greatest asset and are fundamental to everything we do. That’s why we are committed to developing a workforce that is diverse and talented, fostering an inclusive culture of mutual respect so that everyone can excel.
What we do
The journey to discovery is guided by science — and inspired by patients
Every day our scientists, from all backgrounds and disciplines, work together to use the power of leading-edge science to save and improve lives. Scientific invention is at the heart of what we do, and today, we are at the forefront of pioneering science.
We run to, not from, the world’s biggest health challenges.
We focus on scientific innovation to deliver medicines and vaccines that may help millions of people around the world.
This includes helping to solve some of the world’s most urgent global health challenges, including cancer, hepatitis C, antibiotic resistance, Alzheimer’s disease, Ebola, heart disease and more.
Better, more equitable health – beyond just science
We are actively collaborating across all levels of the healthcare system to improve healthcare access and outcomes for patients across the UK.
Our UK Presence
Our UK Human Health division head office is in London Moorgate and our Animal Health division is in Milton Keynes. We additionally have employees working in the field and in manufacturing. We are committed to the UK life sciences industry and to our belief in the power of science to help people and animals live longer, healthier lives. We aspire to be the premier research-intensive biopharmaceutical company with a mission to save and improve lives. Collaboration and partnerships is integral to our work.
London – Moorgate
MSD Human Health & MRL
Milton Keynes
MSD Animal Health
Research based on innovation is at the core of who we are and what we do. It starts with the capabilities and expertise at our facilities, but we’re open to collaboration anywhere the science leads us.
We are pursuing new ways to recruit and engage clinical trial participants who are racially, socioeconomically, and demographically representative of the communities we aim to serve. At any one time, we conduct approximately 150 clinical studies in the UK with around 2,000 patients participating each year.
MSD is a Founding Industry Member of Our Future Health, the UK’s largest health research programme, which aims to prevent, detect and treat disease earlier. The programme will provide new ways to predict with better accuracy who is at higher risk of diseases and would benefit from faster access to screening and prevention interventions.
MSD’s work is more than just scientific. We work hand-in-hand with the NHS across the UK to improve patient outcomes. We have over 45 collaborative projects with the NHS where we’re partnering to pool skills, experience and resources for the development and implementation of patient-centred initiatives.
We strive to operate our business sustainably, considering the impact on both the health of our planet and its inhabitants, while also providing opportunities for product innovation and reduction in costs and risks. We continuously evolve our strategy and efforts in the face of a changing climate.
MSD Animal Health
MSD Animal Health is a research-driven company that develops, manufactures and markets a broad range of veterinary medicines and services.
We offer one of the industry’s most innovative portfolios, spanning products for the prevention, treatment and control of disease in all major farm and companion animal species.
GB-NON-12447 | December 2025