Historical shareholding details of PRIMECAP Management Company holdings in Alkermes plc (ALKS)

Monthly changes of PRIMECAP Management Company shareholding in Alkermes plc over the previous months

Month	Name	Total no. shares held	Percent Holding
Month	Name	Total no. shares held	Percent Holding
Jun 30, 2025	Primecap Management Company	2,902,510	1.76%

Mar 31, 2025	Primecap Management Company	3,004,095	1.82%

Dec 31, 2024	Primecap Management Company	3,095,510	1.88%

Sep 30, 2024	Primecap Management Company	3,297,115	2.04%

Jun 30, 2024	Primecap Management Company	3,385,795	2.09%

Mar 31, 2024	Primecap Management Company	3,473,190	2.11%

Dec 31, 2023	Primecap Management Company	3,565,625	2.11%

Sep 30, 2023	Primecap Management Company	3,882,230	2.33%

Jun 30, 2023	Primecap Management Company	4,126,240	2.48%

Mar 31, 2023	Primecap Management Company	4,198,290	2.52%