Country: Ireland / United States

Mallinckrodt is a long-established pharmaceutical and medical products company with deep roots in the healthcare industry, tracing its heritage back to the founding of the original Mallinckrodt business in St. Louis, Missouri, in 1867. Operating as Mallinckrodt plc, with its registered headquarters in Ireland and a major operational presence in the United States, the company has spent more than 150 years contributing to the development, manufacture, and distribution of speciality pharmaceuticals, hospital therapeutics, and medical products. Its historical portfolio has spanned speciality branded therapeutics addressing rare and critical conditions, along with generics, sterile injectables, active pharmaceutical ingredients (APIs), respiratory therapy solutions, and hospital-based treatments used across immunology, urology, hepatology, ophthalmology, orthopaedics, and critical care.

Backed by more than a century and a half of pharmaceutical expertise and a U.S.-advantaged manufacturing network supported by over 4,000 team members worldwide, Mallinckrodt has combined refined pharmaceutical development with rigorous regulatory compliance to deliver products that meet the highest healthcare standards. The company has long emphasised serving patients living with rare, stigmatised, or underserved conditions, developing therapies that address unmet medical needs across a wide range of clinical specialities, reflecting its enduring commitment to safety, quality, and consistent therapeutic performance.

In a major strategic transformation, Mallinckrodt joined together with Endo on July 31, 2025, forming a leading global therapeutics company. Following the merger, the combined organisation spun off its generics and sterile injectables business as an independent company known as Par Health. At the same time, the speciality therapeutics arm was rebranded in November 2025 as Keenova Therapeutics. Today, Keenova and Par Health operate as separate companies, each carrying forward the Mallinckrodt legacy under its own mission and identity, continuing to serve patients, hospitals, pharmacies, and healthcare institutions worldwide with the innovation, dependability, and pharmaceutical excellence that have long defined the Mallinckrodt name.