CANADA PENSION PLAN INVESTMENT BOARD

CIK

0001283718

City

Toronto Ontario

State / Country

Stock

BIIB — BIOGEN INC.

Holdings in BIIB

Report Date	Value (USD)	Shares	Change	Type	Discretion	Filed
2025-12-31	$24,300,347	138,078	-42.3%	Shares	Sole	2026-02-17
2025-09-30	$33,532,350	239,380	-6.2%	Shares	Sole	2025-11-13
2025-06-30	$32,048,432	255,183	+10.6%	Shares	Sole	2025-08-14
2025-03-31	$31,583,219	230,804	-11.6%	Shares	Sole	2025-05-15
2024-12-31	$39,936,893	261,162	+27.4%	Shares	Sole	2025-02-13
2024-09-30	$39,743,015	205,030	+18.1%	Shares	Sole	2024-11-14
2024-06-30	$40,258,788	173,664	+59.1%	Shares	Sole	2024-08-12
2024-03-31	$23,537,955	109,159	+3.1%	Shares	Sole	2024-05-14
2023-12-31	$27,410,471	105,926	-56.8%	Shares	Sole	2024-02-14
2023-09-30	$63,021,422	245,210	+60.5%	Shares	Sole	2023-11-09
2023-06-30	$43,527,928	152,810	-9.5%	Shares	Sole	2023-08-09
2023-03-31	$46,934,244	168,810	+7.3%	Shares	Sole	2023-05-15
2022-12-31	$43,585,823	157,395	-28.5%	Shares	Sole	2023-02-14
2022-09-30	$58,808,085	220,255	+127.4%	Shares	Sole	2022-11-14
2022-06-30	$19,752,608	96,855	-19.6%	Shares	Sole	2022-08-12
2022-03-31	$25,367,823	120,455	-50.3%	Shares	Sole	2022-05-13
2021-12-31	$58,091,589	242,129	-9.9%	Shares	Sole	2022-02-14
2021-09-30	$76,071,956	268,815	+11.4%	Shares	Sole	2021-11-15
2021-06-30	$83,551,488	241,290	-1.4%	Shares	Sole	2021-11-16
2021-03-31	$68,475,526	244,774	+1498.8%	Shares	Sole	2021-08-16
2020-12-31	$3,748,806	15,310	-63.7%	Shares	Sole	2021-02-17
2020-09-30	$11,980,657	42,233	-36.2%	Shares	Sole	2020-11-12
2020-06-30	$17,700,305	66,157	-15.2%	Shares	Sole	2020-08-14
2020-03-31	$24,687,764	78,032	—	Shares	Sole	2020-05-13