Society Pass (SOPA) shares were 24% lower pre-bell Tuesday, paring Monday's rally.
Aehr Test Systems (AEHR) stock was down 21% after the company reported late Monday lower fiscal Q1 non-GAAP earnings and revenue.
Sanuwave Health (SNWV) shares were 16% lower, a day after the company reported preliminary Q3 revenue that trailed its previous guidance.
Aether (ATHR) stock was down 16% after a 3.2% loss in the previous session.