07:39 AM EST, 12/17/2024 (MT Newswires) -- Syntec Optics Holdings ( OPTX ) shares soared 187% pre-bell Tuesday, extending Monday's rally.

Portage Biotech ( PRTG ) shares surged more than 137% after the company said it has entered into a letter of intent to negotiate an option agreement to sell its iOx Therapeutics subsidiary to Immunova.

Sidus Space ( SIDU ) shares rose nearly 20% in recent premarket activity after a 220% increase in the previous session.