Elon Musk’s companies are known to do business with one another. According to a company filing, Tesla accrued up to $573 million in revenue from SpaceX and xAI alone in 2025.
The original 2025 annual filing stated that most of the income (about $430 million) came from xAI, which is Musk’s AI-focused company. Later, in an amended filing, Tesla reported an additional $143.3 million in proceeds from SpaceX.
SpaceX is one of the biggest buyers of the Cybertruck. The space exploration company has been swapping its gas-powered trucks for battery-powered units since October 2025. By purchasing the electric truck from its sister company, SpaceX has been helping to prop up the stainless-steel automobile.
Bloomberg, citing new vehicle registration data for the last quarter of 2025, reported that SpaceX bought 1,279 Cybertrucks from Tesla. This purchase represented more than 18 percent of US sales in that quarter and was worth more than $100 million.
Analysts estimate that Musk-affiliated entities bought more than 200 Cybertrucks in the first two months of 2026.
Other instances of business dealings between Musk’s companies include xAI procuring Megapack energy storage batteries from Tesla. The EV maker’s latest filing revealed that more than $78 million in revenue came from xAI as of February 2026.
Tesla has integrated xAI’s Grok chatbot in its vehicles. Meanwhile, X incorporated the chatbot on its social media platform before being absorbed by the AI company in March 2025. Blurring the lines even further, SpaceX recently acquired xAI, and the resulting behemoth is planning to launch the biggest initial public offering (IPO) later in 2026.
SpaceX is also jointly producing chips with Tesla.
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