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Alexandr Wang left MIT as a teenager to cofound Scale AI, built the data-infrastructure company into a major supplier to the AI industry and later moved to Meta after its large investment in Scale. [1][2]
Scale AI and a rapid founder ascent
Wang grew up in Los Alamos, New Mexico, the son of physicists, and showed unusual aptitude in mathematics and programming from an early age. By 17 he had already worked as an engineer at Addepar and Quora before briefly studying machine learning at MIT. [1]
At 19 Wang left MIT for Y Combinator and cofounded Scale AI in 2016. The company began by supplying labeled training data and tools for machine-learning systems, then expanded as demand for AI infrastructure accelerated across technology, automotive and government customers. [1][2]
In 2025 Meta acquired a 49% stake in Scale in a transaction that valued the company at roughly $29 billion, and Wang left Scale to lead Meta's AI efforts. His billionaire wealth came from founder ownership in Scale rather than inherited capital or a family operating business. [1][2]
The roughly $29 billion Scale valuation and Meta's purchase of a 49% company stake should not be read as Wang's personal proceeds. His wealth depends on the founder interest he owned before and after the transaction, while the value paid for other shareholders' interests belongs economically to those holders rather than to him. [1][2]
Sources for background
Sources reviewed Sep 15, 2026.
- Alexandr Wang · Forbes · Mar 10, 2026
- Inside Scale AI's Business After Meta's Bombshell $14 Billion Deal · Forbes · May 14, 2026
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