Assertion: foundation's donation | /r/HasProperty | worth
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text: On June 25, 2006, Warren Buffett (then the world's richest person, estimated worth of $62 billion as of April 16, 2008) pledged to give the foundation approximately 10 million Berkshire Hathaway Class B shares (then valued at $3,071 each, before a 50-1 stock split in 2010) spread over multiple years through annual contributions, with the first year's donation of 500,000 shares being worth approximately $1.5 billion.