X0508 4 2026-03-05 0001521036 Lantheus Holdings, Inc. LNTH 0002018026 Morgan Amanda Michelle C/O LANTHEUS HOLDINGS, INC. 201 BURLINGTON ROAD, SOUTH BUILDING BEDFORD MA 01730 0 1 0 0 Chief Commercial Officer 0 Common Stock 2026-03-05 4 A 0 26208 0 A 64748 D Common Stock 2026-03-05 4 F 0 595 76.31 D 64153 D Consists of 13,104 restricted stock units that vest in equal installments over a three-year period and 13,104 Total Shareholder Return performance-based restricted stock units ("PSUs") that cliff vest following a three-year performance period. The amount of PSUs included in this Report reflects the target award; however, the ultimate award size can range from 0% to 200% of the target based on the actual performance achieved at the end of the performance period. /s/ Eric M. Green, attorney-in-fact 2026-03-09