Brian Nichols is the co-founder of Angel Squad, a community where you’ll learn how to angel invest and get a chance to invest as little as $1k into Hustle Fund's top performing early-stage startups

Nobody operates quite like Elon Musk. His investment portfolio isn't a collection of bets on other people's ideas. It's an interconnected empire he built himself, where each company feeds the others in ways that only make sense if you zoom out far enough. Tesla. SpaceX. xAI. Neuralink. The Boring Company. And now, as of February 2026, SpaceX has acquired xAI in a deal valuing the combined entity at $1.25 trillion, with an IPO that could raise up to $50 billion on the horizon. When studying Elon Musk investments, you're not looking at a diversified portfolio. You're looking at a concentrated bet on the future of energy, transportation, AI, and space.

The "Muskonomy" and How It Works

The term "Muskonomy" isn't just a fun media label. It describes a real structural feature of how Musk builds. His companies transact with each other at scale. In 2025, Tesla sold $430 million worth of Megapack battery storage systems to xAI to power its data center infrastructure in Memphis. Tesla then turned around and invested $2 billion into xAI as part of its $20 billion Series E funding round. SpaceX invested another $2 billion into xAI in July 2025. These aren't arm's-length deals. They're a vertically integrated innovation engine operating across multiple balance sheets.

Musk owns approximately 14% of Tesla and roughly 43% of SpaceX. SpaceX, after absorbing xAI, carries an estimated $1.25 trillion valuation heading into its IPO. SpaceX generated about $15 billion in revenue in 2025 with $8 billion in profit. That's an unusually strong margin profile for a capital-intensive business.

The Early Bets That Built the Empire

Musk's investment career started with Zip2, which Compaq acquired in 1999 for enough to fund his next moves. He co-founded X.com, which merged with Confinity to become PayPal, and pocketed $180 million when eBay acquired it in 2002. He then put almost all of that into SpaceX and Tesla simultaneously, a level of personal conviction that most people would call reckless. Both companies nearly collapsed in 2008. Both survived.

The early PayPal story is more than just a fun origin myth. It shaped how Musk thinks about capital allocation. He doesn't hedge. He concentrates, both in the companies he founds and in the way those companies cross-invest in each other.

Eric Bahn, Hustle Fund GP, has pointed to this kind of founder-operator mentality as one of the most important patterns to look for in early-stage companies. Founders who have skin in the game across multiple layers of a company's success tend to make decisions differently than those who are just building toward an exit.

The xAI and SpaceX Merger

The February 2026 SpaceX-xAI combination is the clearest expression yet of Musk's vertical integration thesis. XAI, founded in 2023 as a competitor to OpenAI, closed a $20 billion funding round in January 2026 at a $230 billion valuation. It had already merged with X, the social platform formerly known as Twitter, in an all-stock deal in March 2025. Now xAI sits inside SpaceX, with the stated goal of building orbital AI data centers powered by solar energy.

Whether that vision materializes in the near term is an open question. But the structural logic is clear: Musk is trying to remove every dependency on third-party infrastructure. Energy, compute, launch capacity, distribution. He wants to own the stack.

Neuralink and The Boring Company

The rest of the portfolio is similarly thesis-driven. Neuralink, the brain-computer interface company Musk co-founded in 2016, has moved into human trials and is targeting neurological disorders like paralysis. The Boring Company is focused on underground tunnel infrastructure. Neither of these is a casual bet. Both reflect a consistent worldview: the biggest constraints on human progress are physical infrastructure, and the only way to remove them is to build the infrastructure yourself.

What Angel Investors Can Take From This

You probably aren't building a trillion-dollar empire from scratch. But Musk's approach offers a few transferable lessons. Concentration beats diversification when you have genuine conviction and deep expertise in a space. Cross-portfolio network effects can amplify individual company value in ways that isolated bets can't. And building for infrastructure, the things other builders depend on, tends to generate more durable returns than building applications on top of someone else's stack.

Elizabeth Yin, Hustle Fund GP, has talked about this infrastructure-first framing in the context of evaluating early-stage companies. The question isn't just whether a product is useful. It's whether it becomes load-bearing for other businesses over time.

Building Your Own Conviction: Angel Squad

Angel Squad brings together 2,500+ investors across 50+ countries who are serious about developing the kind of thesis-driven conviction that separates great angel investors from the rest. Musk's portfolio is a masterclass in concentrated, vertically integrated bets. But most of us need a community and a framework before we can start thinking at that level. Angel Squad offers both: live education sessions, access to Hustle Fund's deal flow, and a network of operators-turned-angels who have already made their first moves. If you want to start investing with more conviction and less guesswork, hustlefund.vc/squad is the place to start.

The Takeaway

Elon Musk investments are really just one bet expressed across many companies: that the biggest problems in the world are engineering problems, and that solving them is both a moral obligation and a business opportunity. Whether you agree with his politics or his management style, the structural thinking behind the Muskonomy is worth understanding. Concentration, integration, and infrastructure. That's the playbook.