Elon Musk, owner of Tesla – an American electric car company – saw his assets grow $36 billion last Monday, when his share crossed the $1 billion mark in market capitalization.

Now, the South African businessman has an estimated fortune of $289 billion, ahead of Jeff Bezos, the head of Amazon, whose assets are estimated at $193 billion, according to the Bloomberg Billionaires Index.

Musk has more money in his holdings than the fortunes of Microsoft co-founder Bill Gates, and Marl Zuckerber, owner of Facebbok, combined. Their combined fortune is estimated at $257 billion.

Upon reaching this level, Tesla joins the tech giants that have already crossed that mark, such as Alphabet or Amazon. In the case of Apple and Microsoft, there was already another step forward, as these companies surpassed the $2 billion market capitalization.

Tesla rose in response to a combination of factors announced on Monday. The company received an order for 100,000 cars from the car rental company Hertz, which could reach 4.4 billion US dollars. The company essentially ordered the Model 3 from Tesla, hoping to make 20% of the global fleet consist of electric.