Oberweis Asset Management’s Amphastar Pharmaceuticals AMPH Stock Holding History

Bought
Maintained
Sold
Quarter Market Value Status Shares Change in
Stake
Trade Value Portfolio Weight Portfolio Position
2025
Q1
Sell
2024
Q4
$6.85M Buy
2024
Q3
$7.82M Buy
2024
Q2
$5.4M Sell
2024
Q1
$18.3M Buy
2023
Q4
$21M Buy
2023
Q3
$7.01M Buy
2023
Q2
$8.49M Sell
2023
Q1
$6.68M Buy
2022
Q4
$3.75M Buy
2022
Q3
$2.85M Buy
2022
Q2
$623K Buy
2022
Q1
$485K Hold
2021
Q4
$314K Buy
2021
Q3
$202K Hold
2021
Q2
$214K Buy
2017
Q1
Sell
2016
Q4
$501K Hold
2016
Q3
$516K Hold
2016
Q2
$438K Buy