965 hedge funds and large institutions have $90B invested in Biogen in 2015 Q1 according to their latest regulatory filings, with 132 funds opening new positions, 336 increasing their positions, 371 reducing their positions, and 42 closing their positions.

New
Increased
Maintained
Reduced
Closed

more first-time investments, than exits

New positions opened: | Existing positions closed:

more funds holding in top 10

Funds holding in top 10:

more capital invested

Capital invested by funds: $ → $

more funds holding

Funds holding:

9% less repeat investments, than reductions

Existing positions increased: 336 | Existing positions reduced: 371

35% less call options, than puts

Call options by funds: $1.06B | Put options by funds: $1.64B

Holders
965
Holders Change
Holders Change %
% of All Funds
Holding in Top 10
68
Holding in Top 10 Change
Holding in Top 10 Change %
% of All Funds
New
Increased
Reduced
Closed
Calls
$1.06B
Puts
$1.64B
Net Calls
Net Calls Change

Top Buyers

1 +$951M
2 +$438M
3 +$393M
4
D.E. Shaw & Co
D.E. Shaw & Co
New York
+$301M
5
IC
Institutional Capital
Illinois
+$279M

Top Sellers

1 -$585M
2 -$474M
3 -$258M
4
Goldman Sachs
Goldman Sachs
New York
-$227M
5
Jennison Associates
Jennison Associates
New York
-$221M
Name Holding Trade Value Shares
Change
Change in
Stake
426
$4.04M
427
$4.03M
428
$4.03M
429
$3.94M
430
$3.93M
431
$3.92M
432
$3.9M
433
$3.88M
434
$3.87M
435
$3.86M
436
$3.75M
437
$3.72M
438
$3.72M
439
$3.68M
440
$3.62M
441
$3.62M
442
$3.62M
443
$3.6M
444
$3.58M
445
$3.57M
446
$3.56M
447
$3.56M
448
$3.56M
449
$3.52M
450
$3.51M