Alexandr Wang is leaving Scale AI, the startup he founded in 2016 — that made him the world's youngest self-made billionaire — to join Meta.

Wang, 28, broke the news to employees in a memo that he posted on X on Thursday. Meta is investing $14.3 billion in Scale AI as part of the deal, in exchange for a 49% stake in the startup and access to fresh talent, including Wang. Scale AI's valuation more than doubled from $14 billion to $29 billion due to the investment.

"Opportunities of this magnitude often come at a cost," Wang wrote in the memo. "In this instance, that cost is my departure."

Alexandr Wang. Photographer: David Paul Morris/Bloomberg via Getty Images

Wang will join Meta in a top leadership role in a new division that Meta is calling its Superintelligence lab, and transition from being Scale's CEO to serving as a director on its board, according to The New York Times. Jason Droege, who formerly started and led the Uber Eats business at Uber, will step in as Scale AI's interim CEO.

Related: Meta Is Reportedly Offering Up to Nine-Figure Pay for Researchers on Its New Superintelligence AI Team

Wang was born in New Mexico in 1997 to Chinese immigrant parents who were both employed as........

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