Lantheus issues supplemental merger disclosures after shareholder suits, demand letters

• Curium US Holdings agreed to acquire Lantheus Holdings via a merger, leaving Lantheus as a wholly owned Curium subsidiary.
• Three shareholder suits challenge deal disclosures, alleging omissions on projections, Morgan Stanley analyses, and insider conflicts tied to post-closing retention.
• Sixteen additional shareholder demand letters sought further proxy disclosures as of Sept. 30, 2026.
• Supplemental disclosure updated Morgan Stanley valuation inputs, including 68,200,000 fully diluted shares and net debt components as of June 30, 2026.
• Special meeting to vote on the merger set for Oct. 14, 2026.

Disclaimer: This news brief was created by Public Technologies (PUBT) using generative artificial intelligence. While PUBT strives to provide accurate and timely information, this AI-generated content is for informational purposes only and should not be interpreted as financial, investment, or legal advice. Lantheus Holdings Inc. published the original content used to generate this news brief via EDGAR, the Electronic Data Gathering, Analysis, and Retrieval system operated by the U.S. Securities and Exchange Commission (Ref. ID: 0001193125-26-412563), on October 02, 2026, and is solely responsible for the information contained therein.