1,035 hedge funds and large institutions have $34.9B invested in Biogen in 2021 Q3 according to their latest regulatory filings, with 72 funds opening new positions, 349 increasing their positions, 397 reducing their positions, and 124 closing their positions.

New
Increased
Maintained
Reduced
Closed

less ownership

Funds ownership:

less funds holding

Funds holding:

less repeat investments, than reductions

Existing positions increased: | Existing positions reduced:

less capital invested

Capital invested by funds: $ → $

27% less call options, than puts

Call options by funds: $1.24B | Put options by funds: $1.7B

42% less first-time investments, than exits

New positions opened: 72 | Existing positions closed: 124

44% less funds holding in top 10

Funds holding in top 10: 2715 (-12)

Holders
1,035
Holders Change
Holders Change %
% of All Funds
Holding in Top 10
15
Holding in Top 10 Change
Holding in Top 10 Change %
% of All Funds
New
Increased
Reduced
Closed
Calls
$1.24B
Puts
$1.7B
Net Calls
Net Calls Change

Top Buyers

1 +$195M
2 +$118M
3 +$113M
4
JP Morgan Chase
JP Morgan Chase
New York
+$70.9M
5
Amundi
Amundi
France
+$66.6M

Top Sellers

1 -$181M
2 -$117M
3 -$115M
4
Renaissance Technologies
Renaissance Technologies
New York
-$98.6M
5
Northern Trust
Northern Trust
Illinois
-$87.3M
Name Holding Trade Value Shares
Change
Change in
Stake
601
$590K
602
$581K
603
$580K
604
$577K
605
$575K
606
$574K
607
$566K
608
$565K
609
$551K
610
$546K
611
$540K
612
$537K
613
$521K
614
$518K
615
$514K
616
$512K
617
$511K
618
$508K
619
$498K
620
$497K
621
$496K
622
$490K
623
$482K
624
$482K
625
$478K