Mark Cuban is heavily invested in these two tech companies

Mark Cuban's two biggest bets on Wall Street are tech rivals Amazon and Netflix.

The billionaire Dallas Mavericks owner and Shark Tank judge confirmed at a conference on Thursday that the online shopping giant constitutes his largest investment followed by the streaming service.

Cuban, who made his fortune as a tech entrepreneur in the '90s, has previously called Amazon "the greatest startup and the greatest company in the world."

He said in an interview with CNBC earlier this year that he's generally optimistic about the tech industry's prospects.

"I think we're going to go through the biggest technological revolution we've ever seen in the next 10 years," he told the network.

But Cuban also touched on some criticisms of Silicon Valley in his appearance this week at the New York Times Dealbook conference. The two dominant players in the online advertising world--Facebook and Google--are like a "drug" to consumers, he said.

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Aside from his tech predictions, Cuban also took some time to hint at a possible 2020 presidential run. Cuban's name has been in the mix as a possible contender since his harsh criticisms of Donald Trump on the campaign trail last year.

He claims he would run as a Republican before he would a Democrat but most likely an Independent.

"I'm obviously considering it," Cuban said. "The benefit of being an independent is you go right to the golden ticket time, if I get enough support in the polls then I get to participate in the debates."

But he also relishes the idea of taking on Trump in a hypothetical Republican primary.