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Jeff Bezos just got a whole lot richer.

Shares of his Amazon.com Inc. surged 7.4% Friday after seeing a 12% spike on Thursday, after the largest U.S. e-commerce company reported fourth-quarter results that smashed Wall Street estimates.

Bezos, already the world’s richest person, added $13.2 billion to his fortune in about 15 minutes on Thursday. At the current price, his net worth would be about $116 billion, according to the Bloomberg Billionaires Index.

Bezos, 56, owns about 12% of Amazon’s outstanding stock, making up the bulk of his fortune. His ownership of closely held Blue Origin accounts for about $6.2 billion. The late surge Thursday added more than $90 billion to Amazon’s market value, pushing it above $1 trillion.

His ex-wife, MacKenzie Bezos, 49, also has reason to celebrate, as she owns about 4% of the Seattle-based retailer. She started the day as the world’s 24th-richest person, with a $37.1 billion fortune.

See also: Zuckerberg’s net worth tumbles $4 billion with Facebook dive

Bezos wasn’t the only tech titan with dramatic changes to their net worth this week following company earnings. Elon Musk’s fortune swelled by $2.3 billion in an hour Wednesday after shares of Tesla Inc. rose in extended trading on better-than-expected results. Bill Gates and Steve Ballmer also saw huge gains after Microsoft Corp. reported results. Mark Zuckerberg’s fortune tumbled $4 billion as Facebook shares slid on its slowest-ever quarterly sales growth.

Bloomberg’s wealth ranking officially updates after the close of each trading day in the U.S., so Amazon’s latest surge, if it holds, won’t be reflected until after Friday’s close.

--With assistance from Sophie Alexander.