1,121 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, 398 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: 89.14%89.09% (-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
1,121
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
626
$1.11M
627
$1.08M
628
$1.08M
629
$1.08M
630
$1.07M
631
$1.07M
632
$1.06M
633
$1.05M
634
$1.05M
635
$1.04M
636
$1.04M
637
$1.02M
638
$1.02M
639
$1M
640
$998K
641
$997K
642
$994K
643
$993K
644
$992K
645
$990K
646
$980K
647
$979K
648
$974K
649
$965K
650
$956K