738 hedge funds and large institutions have $60.8B invested in Biogen in 2013 Q4 according to their latest regulatory filings, with 121 funds opening new positions, 247 increasing their positions, 264 reducing their positions, and 30 closing their positions.

New
Increased
Maintained
Reduced
Closed
Holders
738
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
$913M
Puts
$771M
Net Calls
Net Calls Change

Top Buyers

1 +$230M
2 +$201M
3 +$173M
4
Morgan Stanley
Morgan Stanley
New York
+$109M
5
Barclays
Barclays
United Kingdom
+$97.8M

Top Sellers

1 -$533M
2 -$447M
3 -$166M
4
UBS AM
UBS AM
Illinois
-$135M
5
Deutsche Bank
Deutsche Bank
Germany
-$134M
Name Holding Trade Value Shares
Change
Change in
Stake
376
$2.47M
377
$2.47M
378
$2.47M
379
$2.38M
380
$2.38M
381
$2.38M
382
$2.37M
383
$2.34M
384
$2.33M
385
$2.3M
386
$2.27M
387
$2.26M
388
$2.25M
389
$2.24M
390
$2.24M
391
$2.24M
392
$2.23M
393
$2.21M
394
$2.15M
395
$2.11M
396
$2.09M
397
$2.07M
398
$2.07M
399
$2.06M
400
$2.01M