LNTH: Financial results

Item 2.02 Results of Operations and Financial Condition. On November 5, 2026, Lantheus Holdings, Inc. (the “Company”) announced via press release its financial results as of and for the three and nine months ended September 30, 2026. A copy of that press release is being furnished as Exhibit 99.1 and is hereby incorporated by reference. The information furnished pursuant to this Item 2.02, including Exhibit 99.1, 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. Item 9.01 Financial Statements and Exhibits. (d) Exhibits Exhibit No. Description 99.1* Press release of Lantheus Holdings, Inc. dated November 5, 2026, entitled “Lantheus Reports Third Quarter 2026 Financial Results” 104 Cover Page Interactive Data File (embedded within the Inline XBRL document) * Exhibits 99.1 attached hereto are being furnished and shall not be deemed “filed” for purposes of Section 18 of the Exchange Act, as amended, or otherwise subject to the liabilities of that section, nor shall such information be deemed incorporated by reference in any filing under the Securities Act or the Exchange Act, except as shall be expressly set forth by specific reference in such filing. SIGNATURES Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized. LANTHEUS HOLDINGS, INC. By: /s/ Daniel M. Niedzw