922 hedge funds and large institutions have $58.4B invested in Biogen in 2015 Q3 according to their latest regulatory filings, with 105 funds opening new positions, 406 increasing their positions, 283 reducing their positions, and 150 closing their positions.

New
Increased
Maintained
Reduced
Closed
Holders
922
Holders Change
Holders Change %
% of All Funds
Holding in Top 10
37
Holding in Top 10 Change
Holding in Top 10 Change %
% of All Funds
New
Increased
Reduced
Closed
Calls
$1.22B
Puts
$1.8B
Net Calls
Net Calls Change
Name Holding Trade Value Shares
Change
Change in
Stake
326
$6.58M
327
$6.54M
328
$6.53M
329
$6.53M
330
$6.48M
331
$6.44M
332
$6.42M
333
$6.36M
334
$6.33M
335
$6.3M
336
$6.26M
337
$6.15M
338
$6.07M
339
$6.01M
340
$6M
341
$5.84M
342
$5.83M
343
$5.83M
344
$5.69M
345
$5.65M
346
$5.61M
347
$5.6M
348
$5.54M
349
$5.53M
350
$5.45M