Curium Announces Definitive Agreement to Merge with Lantheus

* Strategic transaction would bring Curium's theranostics portfolio and global manufacturing platform together with Lantheus’ complementary U.S. radiodiagnostics business * Total transaction consideration to Lantheus shareholders of up to $114.50 per share in cash for an aggregate transaction value of up to $8.0 billion – representing a premium of 38% to Lantheus’ unaffected 60-day volume-weighted average price and a premium of 29% to Lantheus’ unaffected 30-day volume-weighted average price * Provides for near-term certain value for Lantheus shareholders of $102.50 per share in cash at closing and up to an additional $12.00 per share of Contingent Value Rights tied to specified performance milestones for Lantheus' commercial portfolio * Combined company would serve oncology, neurology and cardiology patients across more than 70 countries BOSTON and BEDFORD, Mass., Aug. 03, 2026 (GLOBE NEWSWIRE) -- Curium™, a leading, global radiopharmaceutical company with proven expertise in the development, manufacturing and supply of radiopharmaceuticals that improve the way cancer is diagnosed and treated, and Lantheus Holdings, Inc. (“Lantheus” or “Company”) (NASDAQ: LNTH), today announced that Curium US Holdings LLC (“Curium US”) and Lantheus have entered into a definitive agreement under which Lantheus, a leading radiopharmaceutical-focused company committed to enabling clinicians to Find, Fight and Follow disease to deliver better patient outcomes, will merge with a wholly-owned subsidiary of Curium US.