1. Berkshire Hathaway announces major leadership changes amid Buffett's retirement. 2. Nancy Pierce becomes CEO of Geico, effective immediately. 3. Marc Hamburg retires as CFO, replaced by Charles Chang in 2027. 4. Adam Johnson assumes a broader role overseeing consumer products and services. 5. BRK.B shares fell 0.5% in premarket trading; up 11.3% in 2025.