Baird Medical Investment Holdings (BDMD) shares were down 38% pre-bell Thursday, paring Tuesday's rally.
Sidus Space (SIDU) stock was 37% lower, adding to losses from the previous session.
Envela (ELA) shares were down more than 16% following a muted session.
LifeStance Health Group (LFST) stock was 15% lower after closing nearly unchanged on Tuesday.
LENSAR (LNSR) shares were down 13% following a 3.2% gain in the previous session.