Stem (STEM) shares were down 17% in Thursday premarket activity after the company posted overnight lower Q1 revenue.
Amplitude (AMPL) stock was 16% lower, a day after the company trimmed its 2026 adjusted EPS guidance.
Snap (SNAP) stock was 9.4% lower following a muted session.
Onterris (ONT) shares were down 8.9%, a day after the company posted lower Q1 revenue.
Citigroup (C) stock was 3.5% lower after the company said it has authorized a new $30 billion stock repurchase plan, expected to begin in Q2.