1,122 hedge funds and large institutions have $60B invested in Biogen in 2017 Q4 according to their latest regulatory filings, with 167 funds opening new positions, 399 increasing their positions, 384 reducing their positions, and 48 closing their positions.

New
Increased
Maintained
Reduced
Closed

more first-time investments, than exits

New positions opened: | Existing positions closed:

more funds holding

Funds holding:

more repeat investments, than reductions

Existing positions increased: | Existing positions reduced:

more capital invested

Capital invested by funds: $ → $

0.05% less ownership

Funds ownership: 89.15%89.1% (-0.05%)

26% less funds holding in top 10

Funds holding in top 10: 3828 (-10)

32% less call options, than puts

Call options by funds: $989M | Put options by funds: $1.44B

Holders
1,122
Holders Change
Holders Change %
% of All Funds
Holding in Top 10
28
Holding in Top 10 Change
Holding in Top 10 Change %
% of All Funds
New
Increased
Reduced
Closed
Calls
$989M
Puts
$1.44B
Net Calls
Net Calls Change

Top Buyers

1 +$618M
2 +$232M
3 +$157M
4
Balyasny Asset Management
Balyasny Asset Management
Illinois
+$123M
5
JP Morgan Chase
JP Morgan Chase
New York
+$106M

Top Sellers

1 -$684M
2 -$230M
3 -$160M
4
Bank of America
Bank of America
North Carolina
-$155M
5
O
OrbiMed
New York
-$127M
Name Holding Trade Value Shares
Change
Change in
Stake
426
$4.09M
427
$4.08M
428
$4.05M
429
$4.03M
430
$3.97M
431
$3.92M
432
$3.89M
433
$3.79M
434
$3.76M
435
$3.73M
436
$3.71M
437
$3.69M
438
$3.68M
439
$3.68M
440
$3.65M
441
$3.56M
442
$3.52M
443
$3.52M
444
$3.51M
445
$3.5M
446
$3.48M
447
$3.44M
448
$3.42M
449
$3.4M
450
$3.37M