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969 hedge funds and large institutions have $58.9B invested in Biogen in 2015 Q4 according to their latest regulatory filings, with 139 funds opening new positions, 331 increasing their positions, 372 reducing their positions, and 82 closing their positions.

New
Increased
Maintained
Reduced
Closed

70% more first-time investments, than exits

New positions opened: 139 | Existing positions closed: 82

5% more funds holding

Funds holding: 923969 (+46)

1% more capital invested

Capital invested by funds: $58.4B → $58.9B (+$503M)

0% more funds holding in top 10

Funds holding in top 10: 3737 (0)

11% less repeat investments, than reductions

Existing positions increased: 331 | Existing positions reduced: 372

24% less call options, than puts

Call options by funds: $1.24B | Put options by funds: $1.63B

Holders
969
Holders Change
+46
Holders Change %
+4.98%
% of All Funds
25.43%
Holding in Top 10
37
Holding in Top 10 Change
Holding in Top 10 Change %
% of All Funds
0.97%
New
139
Increased
331
Reduced
372
Closed
82
Calls
$1.24B
Puts
$1.63B
Net Calls
-$397M
Net Calls Change
+$181M
Name Holding Trade Value Shares
Change
Change in
Stake
Artisan Partners
976
Artisan Partners
Wisconsin
-$64.9M -222,326 Closed
CAM
977
Congress Asset Management
Massachusetts
-$40.4M -138,295 Closed
AI
978
Axiom Investors
Connecticut
-$30.2M -103,352 Closed
RIG
979
Roosevelt Investment Group
New York
-$24.1M -82,760 Closed
SM
980
Sabby Management
Florida
-$22.6M -78,629 Closed
Capital Fund Management (CFM)
981
Capital Fund Management (CFM)
France
-$16.6M -57,636 Closed
PP
982
PDT Partners
New York
-$16.8M -57,546 Closed
CCM
983
Cadian Capital Management
New York
-$14.6M -50,000 Closed
RIM
984
Rainier Investment Management
Washington
-$12.7M -43,400 Closed
TIM
985
Thornburg Investment Management
New Mexico
-$11.5M -39,500 Closed
ASC
986
Atalanta Sosnoff Capital
New York
-$11.3M -38,835 Closed
Renaissance Technologies
987
Renaissance Technologies
New York
-$10.2M -34,961 Closed
GP
988
GLG Partners
United Kingdom
-$8.79M -30,127 Closed
IIM
989
Ivory Investment Management
New York
-$7.92M -27,126 Closed
RSCM
990
Rail-Splitter Capital Management
Illinois
-$6.95M -23,825 Closed
CM
991
Castleark Management
Illinois
-$6.71M -23,005 Closed
AL
992
Airain Ltd
Guernsey
-$6.42M -21,987 Closed
GCM
993
Graham Capital Management
Connecticut
-$6.15M -21,071 Closed
Jacobs Levy Equity Management
994
Jacobs Levy Equity Management
New Jersey
-$5.69M -19,504 Closed
Simplex Trading
995
Simplex Trading
Illinois
-$4.67M -16,253 Closed
FP
996
Foundry Partners
Minnesota
-$4.52M -15,502 Closed
SFP
997
Santa Fe Partners
New Mexico
-$3.85M -13,183 Closed
ID
998
Integral Derivatives
New York
-$3.48M -12,110 Closed
LCM
999
Logan Capital Management
Pennsylvania
-$3.5M -11,977 Closed
PC
1000
Passport Capital
California
-$3.08M -10,551 Closed