07:52 AM EDT, 03/13/2025 (MT Newswires) -- Arko Corp. ( ARKO ) shares slumped 47% pre-bell Thursday following a muted session.
Sera Prognostics ( SERA ) shares retreated 30% following a 1.7% increase in the previous session.
Cytek Biosciences ( CTKB ) shares fell 27% after Wednesday's 2.6% drop.
Y-mAbs Therapeutics ( YMAB ) stock was down 27% after closing flat on Wednesday.