
This question resolves YES if Warren Buffett ceases to be CEO of Berkshire Hathaway before the end of 2025.
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Update 2025-05-04 (PST) (AI summary of creator comment): If Warren Buffett's final day as CEO is December 31st, 2025, the market will resolve to YES. This is based on the reasoning that ceasing to be CEO at any point on December 31st, 2025 (whether effectively at the end of the workday or technically at the very end of the day) is considered before the end of 2025.
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@TimothyJohnson5c16 I would lean to resolving YES if Buffett's final day is December 31st. I would be inclined to this both because (A) he would presumably cease to be CEO in a technical sense at the latest at something like 11:59 PM Central Time (Berkshire Hathaway is headquartered in Omaha, Nebraska), but also because (B) he would effectively have ceased to be CEO at the end of the work day (e.g. 5 PM Central Time), which is unambiguously "before the end of 2025". Presumably news reporting and other sources in either event will say "Buffett was CEO of Berkshire Hathaway from 1970 to 2025".
Warren Buffett announces he will step down as CEO off Berkshire Hathaway "at the end of the year" (BBC).