Transocean (RIG) shares were 15% lower pre-bell Thursday after the company said late Wednesday it priced an upsized public offering of 125 million shares at $3.05 apiece.
Cyclerion Therapeutics (CYCN) stock was down 12%, erasing Wednesday's gains.
CarMax (KMX) shares were nearly 12% lower after the company reported lower fiscal Q2 earnings and revenue.