Sinclair (SBGI) shares were down more than 22% pre-bell Tuesday after a 2% loss on Monday.
CytoMed Therapeutics (GDTC) stock was 20% lower following a muted session.
Mannatech (MTEX) shares were down 17%, reversing from Monday's gains.
Mistras Group (MG) stock was 11% lower following a muted session.