646 hedge funds and large institutions have $47.5B invested in Biogen in 2013 Q2 according to their latest regulatory filings, with 646 funds opening new positions, increasing their positions, reducing their positions, and closing their positions.

New
Increased
Maintained
Reduced
Closed
Holders
646
Holders Change
Holders Change %
% of All Funds
Holding in Top 10
29
Holding in Top 10 Change
Holding in Top 10 Change %
% of All Funds
New
Increased
Reduced
Closed
Calls
$527M
Puts
$606M
Net Calls
Net Calls Change

Top Buyers

No buyers this quarter

Top Sellers

No sellers this quarter
Name Holding Trade Value Shares
Change
Change in
Stake
251
$6.8M
252
$6.64M
253
$6.61M
254
$6.56M
255
$6.55M
256
$6.46M
257
$6.44M
258
$6.42M
259
$6.4M
260
$6.38M
261
$6.1M
262
$5.91M
263
$5.8M
264
$5.71M
265
$5.69M
266
$5.62M
267
$5.61M
268
$5.5M
269
$5.4M
270
$5.35M
271
$5.17M
272
$5M
273
$4.69M
274
$4.64M
275
$4.49M