After hours movers (May 28)

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Gainers
$SMTC 13.54% ~ Semtech Corp.
$PHAS 82.13% ~ PhaseBio Pharma
$BGFV 10.82% ~ Big 5 Sporting Goods
$USCR 0.54% ~ US Concrete

Losers
$SWAV -6.88% ~ Shockwave Medical
$PLT -6.91% ~ Plantronics
$ARNA -9.27% ~ Arena Pharma
$IOVA -12.29% ~ Iovance Biotherapeutics
$KRKR -4.41% ~ 36Kr Holdings