Avita Medical (RCEL) announced late Thursday that it appointed Chairman Cary Vance to the additional post of interim chief executive, effective immediately, replacing Jim Corbett.
The stock slumped 27% as intraday volume topped 1.35 million shares, compared with the daily average of 635,000.
OBOOK Holdings (OWLS) shares fell 27%, declining for the second straight day following the company's direct listing on Nasdaq.
Intraday volume topped 163,000 shares.
AST SpaceMobile (ASTS) shares fell 6.3% after Barclays downgraded the stock to underweight from overweight with a $60 price target.
Volume topped 11.4 million shares, compared with the daily average of almost 12.2 million.
Price: 3.92, Change: -1.46, Percent Change: -27.14