ON Semiconductor Stock (NASDAQ: ON) Today: Nasdaq-100 Removal, New GaN Partnership, Buyback Plan and Analyst Forecasts (Dec. 22, 2025)
ON Semiconductor was removed from the Nasdaq-100 index before market open on December 22, 2025, triggering index-related trading. Shares also moved on news of a strategic gallium nitride partnership with GlobalFoundries and an expanded capital-return plan. Broader chip stocks gained during the holiday-shortened week.