Billionaire Warren Buffett has added an additional $8.1 billion to his massive fortune since Donald Trump became president-elect.

According to CNBC, Buffett — who backed Democrat Hillary Clinton in the presidential election — is doing quite well two weeks after Trump's win.

Buffett, the CEO of Berkshire Hathaway who Forbes reports is worth $71.1 billion, has made $4.3 billion via six of his company's top business holdings. He's also added $3.8 billion thanks to increases in Berkshire Hathaway's stock.

Buffett, 86, is the world's third richest man behind Bill Gates ($82.6 billion) and Amancio Ortega ($71.8 billion). He said after Trump's win that he expected the stock market to continue to prosper during Trump's presidency.

"The stock market will be higher 10, 20 and 30 years from now and it would have been with Hillary [Clinton] and it will be with Trump," he said.

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