• The newly public SpaceX S-1 reveals how closely Elon Musk's companies are connected.
• Last year, SpaceX was involved in more than $660 million worth of payments, goods, and services with the ventures.
• Here's a look at how SpaceX is intertwined with Tesla, The Boring Company, and more.

Step right up to Elon Musk's financial merry-go-round.

Tucked more than 200 pages into SpaceX's S-1 paperwork, which the company filed on Wednesday, is an outline of how interconnected Musk's various companies are, including through more than $660 million in payments, goods, and services involving SpaceX and his other ventures last year.

Musk has his hands in many pots. In addition to being the CEO of aerospace company SpaceX, he's the CEO (and "Technoking") of electric carmaker Tesla, the founder of tunneling business The Boring Company, the cofounder of brain chip firm Neuralink, and was the CEO of xAI, until it merged with SpaceX in February. In various ways, the companies are all intermingled.

SpaceX said in the filing that there may be "conflicts of interest," but ultimately, they benefit investors.

It's not uncommon for companies with certain ties to do business with one another and to spell out these relationships in a prospectus filing when they plan to go public. The breakdown in SpaceX's S-1 is the first look we're getting at some of its connections, including SpaceX's deals with The Boring Company or its purchase of Tesla Cybertrucks.

The biggest expenses between the companies fell under the banner of "commercial, licensing, and support."

Last year, SpaceX paid Tesla $144 million under such agreements, a figure significantly higher than in years past. xAI, then a separate entity, spent more, paying Tesla $506 million last year. xAI, then a separate entity, spent more, paying Tesla $506 million last year, while also bringing in $2 millon in revenue from Tesla.

The majority of SpaceX's cumulative $650 million in spending with Tesla was for Megapack products, Tesla's battery storage system. SpaceX also bought $131 million worth of Cybertrucks, which, at a starting retail price of $69,990 a pop, would be as many as 1,871 vehicles.

Additionally, Tesla paid $4 million last year to advertise on X.

Some expenses were driven by pure practicality: Tesla paid SpaceX $2 million to use its aircraft, X leased office space from The Boring Company for $1 million, and xAI rented space from the billionaire's umbrella company, Musk Industries LLC, for $2 million last year. SpaceX also spent $4 million on a security company owned by Musk for his personal security, as Tesla has done, per its filings.

Other expenses were mind-scratchers. SpaceX paid The Boring Company $1 million in connection with the construction of tunnels in Bastrop, Texas. These could be the tunnels connecting his facilities reported by local outlets, or they could be related to the chip facility SpaceX is building there.

Tesla and SpaceX's relationship is more than transactional

Musk's companies plan to continue doing business together, particularly Tesla and SpaceX, which, the company said, have a "strong and constructive partnership."

Tesla owns nearly 19 million shares of SpaceX stock. While that represents less than 1% of the company, at a target valuation of $1.5 trillion, those shares would be worth about $4.1 billion.

SpaceX and Tesla also have major projects in the works. The pair is developing Macrohard, an agentic AI platform, and, along with Intel, has partnered on Terafab, a manufacturing initiative that creates chips for Tesla's robots and vehicles, as well as SpaceX's orbital compute infrastructure.

The projects are set to be the beginning of a long relationship.

"We plan to explore other areas of strategic collaboration with Tesla in the future," the document says.

• SpaceX's IPO filing shows Elon Musk's companies are doing plenty of business with each other.
• An analyst told Business Insider the spending makes sense if SpaceX needed the products.
• It also shows how much SpaceX spent on Cybertrucks — and how that boosted the truck's sales.

Elon Musk's companies love to work together. Now, we have a bit more insight into how much money is moving between them.

On Wednesday, SpaceX filed its 277-page S-1, a document that peels back the curtain on the combined space-and-AI company's spending.

The filing showed that SpaceX (and its recently acquired fellow Musk company, xAI) bought hundreds of millions of dollars' worth of products from Tesla. Purchases included $697 million in Tesla Megapack products across 2024 and 2025, plus $131 million in Cybertrucks in 2025. The rocket company also bought an additional $34 million in Megapacks between January and March of this year.

The purchases were listed as "related party transactions."

The filing also described other ties between the companies — including work on voice-assistance features in Tesla vehicles, plans for a combined-use chip factory, and Tesla ad purchases on X.

"SpaceX and Tesla developed the early foundation of a strong and constructive partnership through a series of limited but successful commercial engagements," SpaceX wrote in the filing.

Seth Goldstein, an equity strategist at Morningstar who covers Tesla, said the related-party spending is "a little unique" to Tesla and SpaceX, but that the purchases themselves do not strike him as unusual.

"A company like SpaceX purchasing a large amount of work trucks and batteries for energy storage is not unusual and would be necessary for its business," he told Business Insider. "If what SpaceX is buying from Tesla or vice versa is necessary for its operations, then it makes sense."

Goldstein did say one element may raise investor eyebrows: SpaceX reported buying the Cybertrucks "at manufacturer's suggested retail price." He said most companies receive a discount when buying products in bulk.

That wording also offers a rare window into how many Cybertrucks may have gone to one of Musk's own companies.

Tesla sold 20,237 Cybertrucks in 2025, according to Kelley Blue Book. SpaceX did not reveal which trims it purchased, but based on Tesla's posted MSRP for the Cybertruck, the $131 million purchase would imply roughly 1,183 to 1,813 vehicles.

That means SpaceX's Cybertruck purchase could have represented about 6% to 9% of Tesla's Cybertruck sales last year.

SpaceX didn't respond to a request for comment from Business Insider.

• Elon Musk has had a rocky relationship with advertisers since acquiring Twitter in 2022.
• Musk's X sued advertisers for allegedly violating antitrust law by boycotting the app.
• New SEC filings show that X's efforts to win back advertisers haven't led to a bonanza.

Elon Musk's attempts to win over advertisers have yet to spark a major recovery in ad revenue for X.

In 2025, ad revenue for X (formerly Twitter) reached $1.8 billion, up around 7% from 2024. That said, revenue was down 21% from 2023 and about 59% from 2021, the year before Musk took over Twitter and began alienating some brands with looser content moderation.

Here were the stats:

X's ad revenue figures were revealed in an S-1 filing by SpaceX, X's parent company.

Since buying Twitter, Musk's relationship with advertisers has been rocky.

In 2023, he told marketers who were skipping out on X ads that they could "go fuck yourself."

Musk hired an ad industry veteran, Linda Yaccarino, in 2023 to help woo marketers. Yaccarino previously ran ad sales at NBCUniversal.

The drama with the ad industry didn't stop, though.

A year later, X sued an advertising trade group, The World Federation of Advertisers, and some members, including CVS, Unilever, and Mars, alleging they violated antitrust law by collectively withholding ad spend. A judge later tossed out the suit, citing a lack of jurisdiction and X's failure to state a claim under the antitrust laws.

Yaccarino left the company in July 2025.

Last year, there was industry chatter that Musk's entry into politics may have helped X's ad prospects. As Musk took on a high-profile role in the US government, some advertisers began spending on X again. Ad industry insiders previously told Business Insider that they felt buying ads on the app had become a cost of doing business to appease Musk and his allies in President Donald Trump's White House. Musk left his role, and his relationship with the Trump administration has since become more muddled.

Advertising's centrality as a revenue source for X diminished in March 2025 after Musk decided to merge the app into his artificial intelligence company, xAI. The company's AI revenue is growing much faster than its advertising revenue, reaching around $1.35 billion in 2025, a 52% increase from the previous year.

With the decision to merge xAI into SpaceX earlier this year, advertising now accounts for just a fraction of the combined company's $18.7 billion in 2025 revenue.

That doesn't mean X has stopped trying to improve its ad products.

Last month, X announced it had revamped its ads business to integrate more AI tools. This month, X rolled out a new tool that uses AI to connect brands with creators that might be a good fit for their campaigns.

Após meses de especulação, a SpaceX tornou públicos os dados de suas operações no prospecto preliminar de seu IPO, que promete ser o maior da história da humanidade. O documento não traz os valores pretendidos pela companhia, mas o The Wall Street Journal (WSJ) afirma que a fabricante de foguetes comandada por Elon Musk pretende […]

O post SpaceX mira valuation de US$ 1,5 trilhão em contagem regressiva para o IPO apareceu primeiro em NeoFeed.

O empresário Elon Musk negou neste sábado (6) as reportagens que afirmam que sua empresa de foguetes e satélites, a SpaceX, estaria lançando uma venda secundária de ações que poderia avaliar a companhia em US$ 800 bilhões.

“Tem circulado muita matéria dizendo que a SpaceX está levantando recursos a US$ 800 bilhões, o que não é correto”, disse Musk em uma publicação neste sábado em sua plataforma X. “A SpaceX tem sido geradora de caixa há muitos anos e faz recompras periódicas de ações duas vezes por ano para oferecer liquidez a funcionários e investidores”, afirmou.

Pessoas familiarizadas com o assunto disseram à Bloomberg News que a SpaceX está se preparando para realizar a transação. A notícia também foi dada pelo jornal americano Wall Street Journal, citando fontes.

Musk rebateu as notícias dizendo que a SpaceX já oferece liquidez aos investidores porque uma oferta secundária, como a que foi ventilada, serviria para permitir que funcionários e acionistas iniciais vendessem parte de suas participações, algo comum em empresas privadas que não têm ações negociadas em bolsa.

O negócio poderia levar a startup a ser a mais valiosa do mundo, superando o recorde anterior de US$ 500 bilhões estabelecido pela OpenAI, dona do ChatGPT, em outubro.