884 hedge funds and large institutions have $72.3B invested in Biogen in 2014 Q4 according to their latest regulatory filings, with 130 funds opening new positions, 343 increasing their positions, 279 reducing their positions, and 54 closing their positions.

New
Increased
Maintained
Reduced
Closed
Holders
884
Holders Change
Holders Change %
% of All Funds
Holding in Top 10
52
Holding in Top 10 Change
Holding in Top 10 Change %
% of All Funds
New
Increased
Reduced
Closed
Calls
$975M
Puts
$1.36B
Net Calls
Net Calls Change
Name Holding Trade Value Shares
Change
Change in
Stake
326
$6.85M
327
$6.84M
328
$6.8M
329
$6.69M
330
$6.48M
331
$6.46M
332
$6.37M
333
$6.31M
334
$6.29M
335
$6.21M
336
$6.17M
337
$6.17M
338
$6.12M
339
$6.09M
340
$6.04M
341
$6.03M
342
$5.99M
343
$5.96M
344
$5.88M
345
$5.86M
346
$5.86M
347
$5.81M
348
$5.79M
349
$5.77M
350
$5.61M