Start-up Cursor is one of the most popular AI coding tools on the market – and its four co-founders are now worth billions overnight after selling to SpaceX.

SpaceX exercised its option to buy Cursor for $60 billion in all stock, the largest startup acquisition ever, arming xAI and Grok against rivals Anthropic and OpenAI.

Cursor’s four young billionaire cofounders will be worth $2.7 billion each when the deal goes through, according to Forbes estimates.