Warren Buffett is preparing to step down. He just revealed some of his final stock picks.

1. Buffett to retire, revealing significant $1.6 billion stake in UnitedHealth. 2. UnitedHealth shares rose 10% post-announcement, showcasing Buffett's influence. 3. Berkshire sold $3 billion in stocks last quarter, raising cash to $344 billion. 4. Buffett's Apple stake reduced by 7%, indicating a strategic portfolio shift. 5. Berkshire's recent investments in housing and health suggest diversification strategy.