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Position history for DED. E. Shaw & Co., Inc.'s holdings in BIOGEN IDEC INC

D. E. Shaw & Co., Inc. holds 74,438 shares of BIIB (BIOGEN IDEC INC), worth $16.1M as of 2026-Q2. This is a new position. BIIB represents 0.0% of D. E. Shaw & Co., Inc.'s portfolio.

Current Value

$16.1M

Current Shares

74,438

Total Value Change

-$68.2M

Total Shares Change

-360,501

Quarter-by-Quarter History
QuarterActionSharesChangeValueWeightPriceConviction
2026-Q2
Latest
New
74,438
-
$16.1M0.0%$216.06
39
2026-Q1
Exited
0
-100.0%
$00.0%$183.33
0
2025-Q4
Decreased
53,754
-88.8%
$9.5M0.0%$175.99
0
2025-Q3
Decreased
477,924
-65.0%
$66.9M0.0%$140.08
0
2025-Q2
Decreased
1.4M
-13.8%
$171.6M0.1%$125.59
0
2025-Q1
Decreased
1.6M
-1.5%
$217M0.2%$136.84
0
2024-Q4
Increased
1.6M
+270.1%
$246.2M0.2%$152.92
59
2024-Q3
Increased
434,939
+102.6%
$84.3M0.1%$193.84
48

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

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