Baker Bros. Advisors’s Ionis Pharmaceuticals IONS Stock Holding History

Bought
Maintained
Sold
Quarter Market Value Status Shares Change in
Stake
Trade Value Portfolio Weight Portfolio Position
2025
Q2
Sell
2025
Q1
$10.8M Hold
2024
Q4
$12.5M Buy
2024
Q3
$8.95M Buy
2017
Q1
Sell
2016
Q4
$2.73M Hold
2016
Q3
$2.09M Hold
2016
Q2
$1.33M Hold
2016
Q1
$2.31M Hold
2015
Q4
$3.54M Hold
2015
Q3
$2.31M Hold
2015
Q2
$3.29M Hold
2015
Q1
$3.64M Sell
2014
Q4
$5.95M Hold
2014
Q3
$3.74M Hold
2014
Q2
$3.32M Hold
2014
Q1
$4.16M Sell
2013
Q4
$9.84M Hold
2013
Q3
$9.27M Hold
2013
Q2
$6.64M Buy