Top Premarket Gainers

07:08 AM EDT, 10/20/2026 (MT Newswires) -- WISeSat.Space (SAIQ) stock was up 52% pre-bell Tuesday, extending the 7.9% rise at Monday's close. Rapport Therapeutics (RAPP) shares were 21% higher after the company said a phase 2 trial of RAP-219 in Bipolar Mania patients met the primary and secondary endpoints. Netcapital (NCPL) stock was up 16% following a 25% fall in the prior session. Helport AI (HPAI) shares were 14% higher, rebounding from Monday's 7.8% loss. Emerson Radio (MSN) stock was up 3% after retreating 2.9% in the previous session.