BIO-key (BKYI) stock was up 191% pre-bell Tuesday after the company said it signed up a new Middle East government security agency customer for its security platform.

Fitness Champs (FCHL) shares were 74% higher after a 14% rise in the prior session.

Digital Currency X Technology (DCX) stock was up 32%, a day after the company said it signed an investment and commercialization deal with Whales AI.

SU Group (SUGP) shares were 16% higher, nearly reversing the 19% loss from Monday's close.

DLH (DLHC) stock was up 14% after a 2.1% fall in the prior session.