Tech sector CEO turnover has accelerated in 2026 amid AI-driven disruption, economic caution, and board pressure for fresh leadership to scale large language models and platform features. Tim Cook’s planned September 2026 transition at Apple to executive chairman, with hardware lead John Ternus stepping in, anchors the strongest consensus around that outcome. Broader signals include early-year exits at Adobe and Disney plus Q1 global turnover tracking above historical averages, as firms rewire C-suites for Chief AI Officer roles and competitive positioning against rivals like OpenAI and xAI. Traders watch upcoming earnings calls, regulatory scrutiny on big tech, and any internal leaks on succession timelines that could shift odds on names such as Brian Armstrong or Sundar Pichai before year-end.