Charlie Munger, who helped Warren Buffett build Berkshire Hathaway into an investment 

Munger's death was confirmed in a statement from the company,

 which said he died Tuesday at a California hospital.

Munger served as Buffett’s sounding board on investments and business decisions

helped lead Berkshire as its vice chairman for decades.

Munger preferred to stay in the background and let Buffett be the face of Berkshire

he often downplayed his contributions to the company’s remarkable success.

But Buffett always credited Munger with pushing him beyond his early value investing strategies

“Charlie has taught me a lot about valuing businesses and about human nature,” Buffett said in 2008.

Buffett’s early successes were based on what he learned from former Columbia University 

 He would buy stock in companies that were selling cheaply for less than their assets were worth, 

and then, when the market price improved, sell the shares.