Greg Abel moved to assure Berkshire Hathaway shareholders that he will invest wisely and manage the conglomerate's massive cash stake without the burdens of bureaucracy, as he seeks to win over those cautiously hoping he is a worthy successor to Warren Buffett.

Abel, 63, spoke at Berkshire's annual meeting in Omaha, Nebraska, four months after succeeding arguably the world's most famous investor as chief executive officer.

He must earn the trust of investors now enamored with technology and artificial intelligence, rather than Berkshire's collection of insurers, retailers and hard-asset businesses in energy, industrials and manufacturing.