BlackRock Investment Management’s Biogen BIIB Stock Holding History

Bought
Maintained
Sold
Quarter Market Value Status Shares Change in
Stake
Trade Value Portfolio Weight Portfolio Position
2016
Q4
$314M Buy
2016
Q3
$297M Buy
2016
Q2
$133M Sell
2016
Q1
$211M Sell
2015
Q4
$336M Buy
2015
Q3
$318M Buy
2015
Q2
$235M Buy
2015
Q1
$223M Sell
2014
Q4
$184M Sell
2014
Q3
$349M Sell
2014
Q2
$367M Buy
2014
Q1
$228M Buy
2013
Q4
$186M Sell
2013
Q3
$164M Buy
2013
Q2
$140M Buy