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
326
$3.79M
327
$3.76M
328
$3.76M
329
$3.76M
330
$3.69M
331
$3.66M
332
$3.57M
333
$3.56M
334
$3.55M
335
$3.52M
336
$3.49M
337
$3.43M
338
$3.38M
339
$3.36M
340
$3.35M
341
$3.34M
342
$3.31M
343
$3.27M
344
$3.24M
345
$3.24M
346
$3.04M
347
$3.02M
348
$3M
349
$2.97M
350
$2.97M