An investment firm controlled by Bill Gates, Cascade Investment LLC, transferred $1.8 billion to Melinda Gates after they announced their divorce earlier this week.

The two share three adult children after 27 years of marriage. A Securities and Exchange Commission filing dated May 3 revealed that Melinda Gates is now the beneficial owner of 14.1 million shares of Canadian National Railway Co. worth about $1.5 billion. She also owns 2.94 million shares in AutoNation Inc., worth $309 million. According to the Bloomberg Billionaires Index, Bill Gates is worth $145.4 billion.