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
301
$8.2M
302
$8.17M
303
$8.15M
304
$8.07M
305
$8.04M
306
$8.03M
307
$7.94M
308
$7.92M
309
$7.88M
310
$7.77M
311
$7.77M
312
$7.75M
313
$7.73M
314
$7.7M
315
$7.65M
316
$7.59M
317
$7.56M
318
$7.46M
319
$7.3M
320
$7.29M
321
$7.27M
322
$7.26M
323
$7.1M
324
$7.1M
325
$6.97M