How many shares of BIIB does AQR CAPITAL MANAGEMENT LLC own?

As of 2026-Q2, AQR CAPITAL MANAGEMENT LLC holds 1.9M shares of BIIB (BIOGEN IDEC INC).

What is AQR CAPITAL MANAGEMENT LLC's BIIB position worth?

As of 2026-Q2, AQR CAPITAL MANAGEMENT LLC's BIIB position is worth $416.9M.

Is AQR CAPITAL MANAGEMENT LLC buying or selling BIIB?

In 2026-Q2, AQR CAPITAL MANAGEMENT LLC increased their BIIB position (+0.7% change in shares).

When did AQR CAPITAL MANAGEMENT LLC first buy BIIB?

Based on available 13F filings, AQR CAPITAL MANAGEMENT LLC first reported a position in BIIB in 2018-Q4. They have held the position across 31 quarters.

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AQR CAPITAL MANAGEMENT LLC

BIIB
31 quarters

Position history for AQR CAPITAL MANAGEMENT LLC's holdings in BIOGEN IDEC INC

Current Value

$416.9M

Current Shares

1.9M

Total Value Change

-$532.8M

Total Shares Change

-1.2M

Quarter-by-Quarter History

Quarter	Action	Shares	Change	Value	Weight	Price	Conviction
2026-Q2 Latest	Increased	1.9M	+0.7%	$416.9M	0.1%	$216.06	37
2026-Q1	Increased	1.9M	+25.8%	$346.2M	0.2%	$183.33	46
2025-Q4	Decreased	1.5M	-14.3%	$269M	0.1%	$175.99	0
2025-Q3	Increased	1.8M	+30.7%	$248.8M	0.2%	$140.08	47
2025-Q2	Decreased	1.4M	-0.3%	$171.4M	0.1%	$125.59	0
2025-Q1	Increased	1.4M	+153.6%	$187.3M	0.2%	$136.84	59
2024-Q4	Increased	539,692	+982.0%	$81.9M	0.1%	$152.92	57
2024-Q3	Increased	49,881	+111.8%	$9.6M	0.0%	$193.84	45
2024-Q2	Increased	23,557	+270.3%	$5.5M	0.0%	$231.82	44
2024-Q1	Decreased	6,362	-82.9%	$1.4M	0.0%	$215.63	0
2023-Q4	Decreased	37,140	-87.9%	$9.6M	0.0%	$258.77	0
2023-Q3	Decreased	306,679	-8.8%	$78.8M	0.2%	$257.01	0
2023-Q2	Decreased	336,388	-20.4%	$95.7M	0.2%	$284.85	0
2023-Q1	Increased	422,486	+113.6%	$117M	0.3%	$278.03	58
2022-Q4	Decreased	197,818	-22.3%	$54.4M	0.1%	$276.92	0
2022-Q3	Decreased	254,458	-50.4%	$65.8M	0.2%	$267.00	0
2022-Q2	Increased	513,206	+29.5%	$103.5M	0.2%	$203.94	45
2022-Q1	Increased	396,306	+20.7%	$83.5M	0.2%	$210.60	42
2021-Q4	Decreased	328,221	-6.5%	$78.7M	0.1%	$239.92	0
2021-Q3	Decreased	350,860	-31.8%	$99.3M	0.2%	$282.99	0
2021-Q2	Decreased	514,462	-49.8%	$177.6M	0.3%	$346.27	0
2021-Q1	Increased	1M	+0.8%	$283.8M	0.5%	$279.75	37
2020-Q4	Decreased	1M	-54.1%	$245.5M	0.4%	$244.86	0
2020-Q3	Decreased	2.2M	-0.9%	$627.9M	1.1%	$283.68	0
2020-Q2	Increased	2.2M	+5.5%	$583.1M	0.9%	$267.55	47
2020-Q1	Decreased	2.1M	-19.6%	$661.5M	1.1%	$316.38	0
2019-Q4	Decreased	2.6M	-25.0%	$781M	0.9%	$296.73	0
2019-Q3	Decreased	3.5M	-7.3%	$815.2M	1.0%	$232.82	0
2019-Q2	Decreased	3.8M	-10.1%	$887.2M	1.0%	$233.87	0
2019-Q1	Increased	4.2M	+33.7%	$991.8M	1.1%	$236.38	65
2018-Q4	New	3.2M	-	$949.7M	1.1%	$300.92	73

Other major holders of BIIB: BNP PARIBAS FINANCIAL MARKETS, PRIMECAP MANAGEMENT CO/CA/

BIIB31 quarters

BIIB
31 quarters