**Tim Cook’s confirmed transition from Apple CEO to executive chairman on September 1, 2026, with hardware engineering lead John Ternus stepping in, anchors the highest market-implied odds among listed outcomes, reflecting a deliberate succession amid Apple’s AI catch-up efforts.** Elevated CEO turnover across tech in 2025–2026 stems from boards demanding faster adaptation to artificial intelligence, large language model competition, and shifting competitive dynamics, shortening average tenures below eight years. Traders assign lower probabilities to names like Sam Altman at OpenAI or Sundar Pichai at Google due to limited credible signals of imminent change, though executive churn at those firms and pre-IPO pressures elsewhere could introduce volatility. Key upcoming catalysts include quarterly earnings calls, AI regulatory developments, and any board announcements through year-end that might shift consensus before the December 31, 2026 resolution window.