It is a lot. Honestly, keeping track of Elon Musk’s portfolio feels like trying to count planes at a busy airport during a storm. One minute he’s tweeting about Dogecoin, the next he’s launching a stainless steel tower into the atmosphere. People always ask what companies does Elon Musk own, but the answer is rarely just a simple list of names. It’s a messy, overlapping web of private entities, public stock, and weirdly named holding companies.
Most folks know the big two: Tesla and SpaceX. But by early 2026, the map has shifted significantly. We aren't just looking at cars and rockets anymore. We're looking at a massive convergence of artificial intelligence, social media data, and literal brain chips.
The Big Public One: Tesla, Inc.
Tesla is the giant in the room. Even though it’s a public company, Musk is the face of it. He’s the "Technoking," a title he actually gave himself, which is just very... him. As of early 2026, Musk owns about 13% to 20% of the company, depending on how you count his performance-based options that keep hitting their marks.
Tesla isn't just about the Model 3 or the Cybertruck anymore. By now, the focus has pivoted hard toward Optimus, the humanoid robot, and the Cybercab. You've probably seen the footage of the Memphis "Colossus" supercomputer—Tesla and xAI are basically neighbors in the compute world. Tesla is also the parent of SolarCity, which it swallowed back in 2016. So, if you have Tesla solar panels on your roof, you’re technically part of this ecosystem.
SpaceX and the Starlink Cash Cow
SpaceX is where things get interesting because it’s private. Musk owns roughly 42% of the company but controls the vast majority of the voting power. This is his baby. In January 2026, there’s a ton of noise about a potential SpaceX IPO, or at least a spinoff of Starlink.
Speaking of Starlink, it’s basically a company within a company. It’s the satellite internet wing that currently has over 9,000 satellites orbiting above us. It’s the part of the business that actually makes the "boring" regular money needed to fund the "exciting" Starship missions to Mars. If you live in a rural area and your internet doesn't suck, you’re likely paying SpaceX every month.
X and xAI: The New Power Couple
This is where the most recent drama lives. Remember Twitter? Yeah, it’s X now. But the big news is that X and xAI (Musk’s AI startup) have basically merged into a single powerhouse called X.AI Holdings Corp.
Basically, Musk realized that for AI to be smart, it needs data. X has the data—every tweet, argument, and meme ever posted. xAI has the Grok chatbot. In early 2026, xAI’s valuation has skyrocketed to over $230 billion after a massive funding round. It’s now one of the most valuable private companies on the planet. Musk owns the lion's share of this entity, having folded the old Twitter investors into the new AI-focused structure.
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The Niche Ventures: Neuralink and The Boring Company
Then you have the smaller, "sci-fi" projects.
- Neuralink: This is the brain-computer interface company. They’ve moved past just monkeys playing Pong and are deep into human trials. By now, they’re working on "Blindsight," a project aimed at restoring vision. Musk is a co-founder and the primary owner.
- The Boring Company: It started as a joke about traffic on a Los Angeles highway, but it’s real. They dig tunnels. The Las Vegas Loop is the most famous example. It’s still private, and Musk owns over 90% of it.
The Companies He Used to Own (But Doesn't)
People often get confused about his history. Musk does not own PayPal anymore; he was a co-founder of X.com, which merged with Confinity to become PayPal, and then eBay bought them for a billion dollars back in 2002. That’s where he got the "seed money" for SpaceX.
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He also co-founded OpenAI (the ChatGPT people) as a nonprofit in 2015. He left the board in 2018 after a power struggle and has been suing them or complaining about them ever since. So no, he doesn't own OpenAI—he’s actually their biggest rival now.
What This Means for You
If you're trying to figure out how to invest in Musk’s world, it’s tricky. You can buy Tesla (TSLA) on the stock market today. But for SpaceX, xAI, or Neuralink? You’re mostly out of luck unless you’re an "accredited investor" (which is just a fancy way of saying you’re already rich).
However, watching where he puts his money tells you where the world is going. Right now, he’s betting everything on autonomy. He wants the cars to drive themselves, the robots to do your laundry, and the AI to write your emails.
Actionable Next Steps
- Check your 401k/ETFs: If you own an S&P 500 index fund, you already own a piece of Tesla.
- Monitor the SpaceX IPO rumors: 2026 is looking like the year Starlink might finally go public. If it does, that’s your first chance to own a piece of his space empire.
- Use the "Everything App": If you use X, you’re interacting with his AI training data. Consider how that data is being used by Grok.
- Look into secondary markets: Platforms like Hiive or Forge Global sometimes allow people to buy "pre-IPO" shares of private companies like SpaceX, though the fees are usually high and the risks are massive.
The "Musk Economy" is bigger than it has ever been. It’s no longer just about making cool stuff; it’s about controlling the infrastructure of the future—from the internet in the sky to the chips in our heads.