UPDATE 1-Buffett celebrates 50th year at Berkshire, gave no hint of successor
May 02, 2015 at 14:50 PM EDT
OMAHA, Neb., May 2 (Reuters) - Berkshire Hathaway Inc shareholders on Saturday celebrated Warren Buffett's 50th anniversary running the conglomerate, as the billionaire expressed optimism the company would thrive over the long haul, even after he's gone.