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
301
$5.33M
302
$5.31M
303
$5.19M
304
$4.98M
305
$4.93M
306
$4.8M
307
$4.75M
308
$4.68M
309
$4.66M
310
$4.57M
311
$4.5M
312
$4.5M
313
$4.47M
314
$4.46M
315
$4.28M
316
$4.24M
317
$4.24M
318
$4.2M
319
$4.16M
320
$4.1M
321
$3.97M
322
$3.9M
323
$3.89M
324
$3.85M
325
$3.84M