Does Northern Trust own BIIB stock?

Yes. As of its Q2 2026 13F, Northern Trust holds 1,429,490 shares of BIIB (Biogen), worth $308.9M.

How many shares of BIIB does Northern Trust own?

As of its Q2 2026 13F, Northern Trust holds 1,429,490 shares of BIIB (Biogen).

As of its Q2 2026 13F, Northern Trust's BIIB position is worth $308.9M.

In Q2 2026, Northern Trust reduced its BIIB position by 17,089 shares (-1.2%).

Northern Trust already held BIIB in its Q1 2019 13F, the earliest on record, and has listed it in 30 quarterly 13F filings.

Position history for NORTHERN TRUST CORP's holdings in BIOGEN INC

Current Value

$308.9M

Current Shares

1.4M

Total Value Change

-$376.4M

Total Shares Change

-1.5M

Quarter-by-Quarter History

Quarter	Action	Shares	Change	Value	Weight	Price	Conviction
2026-Q2 Latest	Decreased	1.4M	-1.2%	$308.9M	0.0%	$216.06	0
2026-Q1	Increased	1.4M	+0.0%	$265.2M	0.0%	$183.33	31
2025-Q4	Decreased	1.4M	-3.5%	$254.5M	0.0%	$175.99	0
2025-Q3	Decreased	1.5M	-2.5%	$210M	0.0%	$140.08	0
2025-Q2	Increased	1.5M	+2.4%	$193M	0.0%	$125.59	31
2025-Q1	Decreased	1.5M	-3.2%	$205.4M	0.0%	$136.84	0
2024-Q4	Increased	1.6M	+14.6%	$237M	0.0%	$152.92	35
2024-Q3	Decreased	1.4M	-5.1%	$262.3M	0.0%	$193.84	0
2024-Q2	Increased	1.4M	+2.7%	$330.6M	0.1%	$231.82	32
2024-Q1	Decreased	1.4M	-7.1%	$299.4M	0.1%	$215.63	0
2023-Q4	Decreased	1.5M	-9.0%	$386.9M	0.1%	$258.77	0
2023-Q3	Increased	1.6M	+2.8%	$422.3M	0.1%	$257.01	32
2023-Q2	Decreased	1.6M	-4.4%	$455.1M	0.1%	$284.85	0
2023-Q1	Decreased	1.7M	-0.0%	$464.7M	0.1%	$278.03	0
2022-Q4	Decreased	1.7M	-0.8%	$462.9M	0.1%	$276.92	0
2022-Q3	Decreased	1.7M	-1.4%	$449.9M	0.1%	$267.00	0
2022-Q2	Increased	1.7M	+1.4%	$348.7M	0.1%	$203.94	31
2022-Q1	Decreased	1.7M	-0.4%	$355M	0.1%	$210.60	0
2021-Q4	Decreased	1.7M	-3.8%	$406M	0.1%	$239.92	0
2021-Q3	Decreased	1.8M	-14.9%	$497.7M	0.1%	$282.99	0
2021-Q2	Decreased	2.1M	-2.5%	$715.9M	0.1%	$346.27	0
2021-Q1	Decreased	2.1M	-3.7%	$593.2M	0.1%	$279.75	0
2020-Q4	Decreased	2.2M	-7.7%	$538.9M	0.1%	$244.86	0
2020-Q3	Decreased	2.4M	-2.2%	$676.1M	0.1%	$283.68	0
2020-Q2	Decreased	2.4M	-1.3%	$652.2M	0.2%	$267.55	0
2020-Q1	Decreased	2.5M	-0.8%	$781.7M	0.2%	$316.38	0
2019-Q4	Decreased	2.5M	-10.8%	$739.2M	0.2%	$296.73	0
2019-Q3	Decreased	2.8M	-3.1%	$650.2M	0.2%	$232.82	0
2019-Q2	Decreased	2.9M	-0.6%	$674.2M	0.2%	$233.87	0
2019-Q1	First report	2.9M	-	$685.3M	0.2%	$236.38	0