Nvidia CEO Jensen Huang leapt into the top 10 of Forbes’ real-time billionaire rankings Monday, a first for the former Denny’s busboy and waiter turned perhaps the most recognizable name associated with the 2020s generative artificial intelligence boom.

Huang’s net worth climbed $3.6 billion to $124.1 billion by market close, topping the fortune of former Microsoft CEO Steve Ballmer ($122.5 billion net worth), who traded places with Huang to become the world’s 11th-richest person.

The rise in Huang’s fortune came as shares of Nvidia rose 4.1% to a new all-time high of almost $144.

Huang’s roughly 3.5% equity stake in Nvidia accounts for almost all of his net worth, as Huang’s slice of the $3.5 trillion Nvidia is worth $122.2 billion.