Nike co-founder and chairman emeritus, Phil Knight, gave 12 million shares of Nike stock valued at $990 million to an unnamed charity, according to a regulatory filing.

The filing didn’t identify the beneficiary but noted that Knight and his wife Penelope are directors of the entity.

The Knights previously contributed hundreds of millions of dollars to the University of Oregon and Stanford University.

The latest donation represents about 0.7 percent of the company’s outstanding shares and 3.1 percent of Knight’s $32 billion fortune, according to the Bloomberg Billionaires Index, a ranking of the world’s 500 richest people.

Photo courtesy Nike