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Position history for AIAlyeska Investment Group, L.P.'s holdings in BIOGEN IDEC INC

Alyeska Investment Group, L.P. holds 932,374 shares of BIIB (BIOGEN IDEC INC), worth $201.4M as of 2026-Q2. The position was increased (+15.8% shares). BIIB represents 0.5% of Alyeska Investment Group, L.P.'s portfolio.

Current Value

$201.4M

Current Shares

932,374

Total Value Change

+$201.4M

Total Shares Change

+932,374

Quarter-by-Quarter History
QuarterActionSharesChangeValueWeightPriceConviction
2026-Q2
Latest
Increased
932,374
+15.8%
$201.4M0.5%$216.06
50
2026-Q1
Decreased
805,050
-21.4%
$147.6M0.4%$183.33
0
2025-Q4
Increased
1M
+21.2%
$180.3M0.5%$175.99
51
2025-Q3
Increased
845,277
+66.1%
$118.4M0.4%$140.08
53
2025-Q2
New
508,773
-
$63.9M0.2%$125.59
49
2024-Q3
Exited
0
-100.0%
$00.0%$193.84
0

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

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