New York (CNN Business) Warren Buffett revealed how much his stake in Amazon is worth: more than $900 million.

Amazon AMZN The CEO of Berkshire Hathaway has long praised and its CEO, Jeff Bezos, whose net worth passed Buffett's two years ago on his way to claiming the title as the world's richest man.

Buffett has said he admires Bezos' business skills , and his success creating both the online retailing powerhouse and its cloud computing business. He joined with Amazon and JPMorgan Chase to work on an insurance offering for the three companies' employees that many believe could reshape the health insurance industry. He even joked he would get a blood infusion from Bezos if he could.

And he bemoaned the fact that Berkshire, which is notoriously slow to buy tech stocks, had not profited from its success.

"We missed it entirely, incidentally," he told his investors at Berkshire's annual meeting two years ago as he was detailing Bezos' many successes. "We never owned a share of Amazon."