Repay Holdings (RPAY) shares slumped 22% pre-bell Monday following a 1.7% loss in the previous session.
DallasNews Corporation (DALN) shares fell 19%, reversing from Friday's gains.
Design Therapeutics (DSGN) shares decreased 16% after a 3.7% loss on Friday.
Chicago Rivet & Machine (CVR) shares slid 13% after a 2.5% drop.
Septerna (SEPN) shares were down 13%, adding to Friday's 1.7% loss.