Viking Global Investors’s Biogen BIIB Stock Holding History

Bought
Maintained
Sold
Quarter Market Value Status Shares Change in
Stake
Trade Value Portfolio Weight Portfolio Position
2017
Q2
Sell
2017
Q1
$188M Sell
2016
Q4
$544M Sell
2016
Q3
$684M Sell
2016
Q2
$776M Buy
2016
Q1
$60.1M Sell
2015
Q4
$113M Buy
2015
Q3
Sell
2015
Q2
$207M Buy
2014
Q2
Sell
2014
Q1
$119M Buy
2013
Q4
Sell
2013
Q3
$69.9M Sell
2013
Q2
$208M Buy