Top Premarket Gainers

07:18 AM EDT, 10/12/2026 (MT Newswires) -- J-Star (YMAT) stock rose 141% pre-bell Monday after the company said Friday that its ongoing corporate capital initiatives will fund a new automated carbon fiber production facility in Houston. DataMeds AI (MEDS) shares were 24% higher after the company said its Helomics subsidiary received a Medicaid coverage determination for its ChemoFx test in gynecologic cancers. Netcapital (NCPL) shares were up 31%, reversing Friday's 13% loss. SkyAI (SKYA) stock was up 10% after the company said late Sunday that it plans to launch a cash tender offer to buy up to 95% of its outstanding common stock and warrants for $3 each. CitroTech (CITR) shares gained 15%, following a 0.7% advance in the prior trading session.