LNTH: Company disclosure · Other company developments

Item 7.01 Regulation FD Disclosure. On August 3, 2026, Lantheus Holdings, Inc., a Delaware corporation (“ Lantheus ” or the “ Company ”), and Curium US Holdings LLC, a Delaware limited liability company (“ Parent ”), issued a joint press release announcing the execution of an Agreement and Plan of Merger (the “ Merger Agreement ”), dated August 3, 2026, by and among the Company, Parent, and Coco Merger Sub Inc., a Delaware corporation and a wholly owned subsidiary of Parent. Also on August 3, 2026, the Company published a related investor presentation on its website. Copies of the joint press release and the investor presentation are attached as Exhibits 99.1 and 99.2, respectively, hereto and are incorporated herein by reference. The information furnished pursuant to this Item 7.01, including Exhibits 99.1 and 99.2, shall not be deemed “filed” for purposes of Section 18 of the Securities Exchange Act of 1934, as amended (the “ Exchange Act ”), or otherwise subject to the liabilities under that section and shall not be deemed to be incorporated by reference into any filing of the Company under the Securities Act of 1933, as amended (the “ Securities Act ”), or the Exchange Act, except as shall be expressly set forth by specific reference in such filing. The information required to be reported on a Current Report on Form 8-K with respect to the Merger Agreement will be filed by the Company in a separate Current Report on Form 8-K. Item 8.01 Other Events. In light of the transactions contemplated by the Merger Agreement, the Company has determined to pause its previously-disclosed CEO search process. Additional Information and Where to Find It In connection with the proposed acquisition of the Company by Parent, the Company intends to file a preliminary and definitive pro