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Elon Musk's Companies Explained: A Guide for Investors in 2026
Elon Musk is one of the most interesting figures in business, and his companies span rockets, electric cars, brain implants, tunnel-boring, satellite internet, social media, and artificial intelligence. Some are public. Some are private. Some are wildly profitable. Some lose billions a year. Together they make Musk the world's richest person, and arguably the most-watched founder on the planet.
If you're trying to make sense of which Musk venture does what, which ones you can actually invest in, and how they connect, this guide breaks it down clearly.
Tesla
What it is: An electric vehicle and clean energy company.
Status: Publicly traded on the Nasdaq under the ticker TSLA since 2010.
Tesla is the company that turned Musk from a wealthy entrepreneur into a household name. Founded in 2003 by Martin Eberhard and Marc Tarpenning, Musk joined as chairman and lead investor shortly after, became CEO in 2008, and has led the company since.
Tesla designs, manufactures, and sells electric vehicles (the Model S, Model 3, Model X, Model Y, and Cybertruck), along with solar panels, home battery systems (Powerwall), and large-scale grid storage (Megapack). It also operates a global network of Supercharger fast-charging stations.
Beyond cars, Tesla has invested heavily in autonomous driving software, AI training infrastructure, and humanoid robotics through its Optimus project.
Why investors care: Tesla pioneered the mass-market electric vehicle category and remains one of the most valuable car companies in the world by market cap, even as competition from Chinese EV makers intensifies. The stock is also a play on AI, robotics, and the broader energy transition.
SpaceX
What it is: A rocket, spacecraft, and satellite internet company.
Status: Private since founding, but going public on the Nasdaq on 12 June 2026 under the ticker $SPCX.
Founded in 2002, SpaceX is the company most associated with Musk's "make humanity a multi-planetary species" mission. It designs and manufactures reusable rockets (the Falcon 9 and the next-generation Starship), operates the Starlink satellite internet network, and provides launch services to NASA, the US Department of Defence, and private companies worldwide.
SpaceX dominates the global rocket launch market with an estimated 80%+ share of mass delivered to orbit. Its reusable rocket technology has reduced per-launch costs by more than 95% compared to traditional expendable rockets, giving it a structural cost advantage competitors haven't been able to close.
In 2025, SpaceX also acquired xAI, folding Musk's AI venture into its operations.
Why investors care: SpaceX is the most anticipated IPO of 2026, targeting a $75-$80 billion raise at a valuation between $1.75 and $2 trillion. If it hits the upper end, it'll be the largest IPO in history.
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Starlink (a SpaceX subsidiary)
What it is: A low-Earth-orbit satellite internet network.
Status: Wholly owned by SpaceX. Investors gain exposure to Starlink through SpaceX.
Starlink is what many investors view as the real cash machine inside SpaceX. It's a constellation of thousands of low-Earth-orbit satellites that beam broadband internet to subscribers worldwide, particularly in rural and remote areas where traditional fibre and cable infrastructure don't reach.
The service is now available in over 100 countries, including Nigeria, Ghana, and Kenya, where it has become a meaningful alternative to ISPs in underserved regions. Starlink is also expanding into direct-to-mobile services, enabling standard smartphones to connect to satellites without a dedicated dish.
Why investors care: Starlink is a recurring-revenue subscription business riding on SpaceX's launch infrastructure. Markets love recurring revenue, and Starlink has a global addressable market that's hard to find in mature industries.
xAI
What it is: An artificial intelligence research and product company.
Status: Acquired by SpaceX in 2025. Now part of the SpaceX umbrella.
Musk founded xAI in 2023 with the stated mission of building AI that "understands the true nature of the universe." The company developed Grok, an AI chatbot integrated into the X platform, and operates one of the largest GPU compute clusters in the world.
After SpaceX acquired xAI in 2025, the combined entity began monetising its unused compute capacity through large-scale data centre deals with other AI companies. This has positioned SpaceX not just as a rocket and satellite company, but as a meaningful player in AI infrastructure.
Why investors care: AI compute is one of the highest-growth segments in technology right now. xAI's inclusion in SpaceX gives prospective $SPCX investors indirect exposure to AI infrastructure alongside the core space business.
X (formerly Twitter)
What it is: A social media platform.
Status: Privately held by X Corp, which Musk acquired in October 2022 for approximately $44 billion.
After buying Twitter, Musk renamed it X and pursued a strategy to turn the platform into an "everything app" that combines social media, payments, video, and AI features. The company laid off the majority of its pre-acquisition workforce and pivoted toward a subscription-based revenue model alongside its existing advertising business.
X has remained controversial since the acquisition. Advertiser confidence has wavered, user growth has been mixed, and the company's valuation has been the subject of intense debate. Fidelity, which holds a small stake from the original acquisition, has repeatedly marked down the value of its position in public filings.
Why investors care: X is private, so direct investment isn't available to retail investors. But its performance affects how markets perceive Musk's broader portfolio, and any future IPO of X would likely draw significant interest.
Neuralink
What it is: A brain-computer interface company.
Status: Private, with Musk as the largest shareholder.
Founded in 2016, Neuralink is developing implantable brain-computer interfaces (BCIs) that allow direct communication between the human brain and external devices. Its initial focus is on helping people with paralysis control computers and prosthetics through thought alone, with longer-term ambitions in treating neurological conditions like Parkinson's and ALS.
Neuralink received FDA approval for human trials in 2023, and the first patient implant was performed in early 2024. The company has been valued at approximately $5-$8 billion in private funding rounds.
Why investors care: Neuralink is years away from an IPO, but it represents one of the most ambitious medical-technology bets in the world. If BCIs become a mainstream medical tool, the addressable market is enormous.
The Boring Company
What it is: A tunnel-construction and infrastructure company.
Status: Private, with Musk as the largest shareholder.
The Boring Company was founded in 2017 to reduce the cost and time required to build underground transportation tunnels. Its first commercial project, the Vegas Loop, runs beneath the Las Vegas Convention Centre and shuttles passengers in Tesla vehicles through underground tunnels.
The company has secured contracts for additional tunnel projects in the US, but commercial scale-up has been slower than initially promised. Valuations from private funding rounds have ranged from $5 to $7 billion in recent years.
Why investors care: The Boring Company is a longer shot among Musk's ventures. It's not currently a meaningful revenue contributor, but if tunnel-boring costs can be reduced, as Musk has promised, the implications for urban transport infrastructure would be significant.
How to invest in Musk's public companies
Of all the companies above, only two are currently or imminently accessible to public-market investors: TSLA and SPCX.
With Raenest, you can buy both TSLA and SPCX directly in the app, alongside thousands of other US stocks and ETFs, starting from as little as $2 per share. Verified users can fund their trading wallet from any of their existing Raenest balances (USD, GBP, EUR, or NGN) and start investing immediately.
For the practical walkthrough on how to buy, sell, and manage US stocks on Raenest, see our guide: How Stocks Work on Raenest.
Sign up for Raenest and complete your verification now, so you're ready to buy $TSLA, $SPCX, or any other US stock when the moment is right for you.
Frequently asked questions
- How many companies does Elon Musk own?
Musk has significant ownership stakes in seven major companies: Tesla, SpaceX, X (formerly Twitter), Neuralink, The Boring Company, and the SpaceX-owned subsidiaries Starlink and xAI. The exact ownership percentage varies by company, with Musk holding the largest individual stake in each.
- Which Elon Musk companies are publicly traded?
Tesla is the only Musk company currently publicly traded, listed on Nasdaq under the symbol $TSLA. SpaceX will join the public markets on 12 June 2026 under $SPCX. The other Musk-led companies, including X, Neuralink, and The Boring Company, remain private.
- Can I invest in SpaceX before the IPO?
Direct retail access to pre-IPO SpaceX shares has been extremely limited and generally restricted to accredited investors and institutional buyers. Once SpaceX lists on 12 June 2026, anyone with a verified Raenest account can buy $SPCX directly through the app.
- Is xAI publicly traded?
No. xAI was acquired by SpaceX in 2025 and is now a subsidiary of SpaceX. Once SpaceX goes public, investors in $SPCX will have indirect exposure to xAI's operations.
- What is Elon Musk's most valuable company?
By private valuation, SpaceX has been the most valuable of Musk's companies, with estimates ranging from $1.75 to $2 trillion ahead of its 2026 IPO. Tesla's public market valuation fluctuates with its stock price but has historically been the second-largest of its ventures.
- Will Neuralink or The Boring Company IPO?
Neither company has officially announced plans for an IPO. Both remain private, and any future public listing would likely be years away.
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