Tim Cook’s planned transition from Apple CEO to executive chairman in September 2026 has driven the strongest market consensus for an imminent departure before 2027, reflecting a structured succession amid AI hardware and services priorities. In contrast, low implied probabilities for leaders like Sam Altman at OpenAI, Sundar Pichai at Google, and Andy Jassy at Amazon stem from entrenched voting control, stable board support, and focus on large language model scaling despite internal talent churn to pre-IPO rivals. OpenAI’s multiple 2026 executive exits highlight reorganization pressures but have not displaced its CEO, while Google’s AI researcher losses underscore competitive dynamics without altering Pichai’s position. Traders watch for any regulatory or performance catalysts that could accelerate change before year-end 2026 resolution.