After hours movers (Apr 30)
Gainers
$MRKR 25.22% ~ Marker Therapeutics
$HLX 18.53% ~ Helix Energy Solutions Group
$AR 15.85% ~ Antero Resources
$UCTT 15.65% ~ Ultra Clean Holdings
Losers
$CHK -21.79% ~ Chesapeake Energy Corp
$ALGN -3.28% ~ Align Technology
$CMO -8.32% ~ Capstead Mortgage