One of the most interesting M&A deals of 2026 is also one of the hardest to classify. In February, SpaceX acquired artificial intelligence company xAI in an all-stock transaction valuing SpaceX at around $1 trillion and xAI at $250 billion, giving the combined business a headline value of roughly $1.25 trillion. It was the largest acquisition of a private company in history.
The commercial logic is relatively simple. SpaceX has rockets, satellites and Starlink, while xAI has Grok, AI models and large-scale computing infrastructure. Combining the two gives Musk a business spanning both the production of AI and some of the infrastructure required to run it. The ambition goes beyond a conventional technology acquisition: the combined company has discussed space-based data centres and a more vertically integrated AI infrastructure business.
The transaction was handled by two firms that would be unsurprising choices for a deal of this scale and complexity. Gibson Dunn advised SpaceX, while Sullivan & Cromwell advised xAI. Their involvement was arguably predictable given the firms' experience in major M&A, technology, capital markets and complex financing transactions. Gibson Dunn's team had to deal with SpaceX's capital structure, financing, tax, antitrust and government-contract issues, while Sullivan & Cromwell advised xAI across financing, tax, securities, regulatory and intellectual-property matters.
What makes the deal particularly interesting, however, is its relationship with SpaceX's IPO. Only four months later, SpaceX raised $75 billion in its public offering at a valuation of $1.77 trillion, making it the largest IPO in history.
This raises an important question: did M&A help create a more valuable company before it entered the public markets? The answer is not necessarily that the xAI acquisition was designed simply to inflate SpaceX's valuation. There is no clear evidence of that. But strategically, bringing xAI inside SpaceX clearly changed the story investors were being asked to buy. SpaceX was no longer primarily a rocket and satellite company. It could present itself as a combined aerospace, communications, AI and computing company at exactly the moment investors were willing to assign enormous valuations to AI exposure.
The financial scale of the comparison is revealing. The xAI transaction valued the target at $250 billion, while SpaceX ultimately entered public markets at $1.77 trillion. In other words, xAI represented roughly 14% of SpaceX's IPO valuation. That is not insignificant, but it also raises the question of whether such a relatively small component could meaningfully transform the value of the much larger group. Investors were not necessarily paying $1.77 trillion simply for xAI; they were paying for the possibility that combining SpaceX's infrastructure with AI could create something significantly larger than either business operating separately.
There is an important M&A principle here. Acquisitions can create value not only through the revenue of the target, but through what the target does to the strategy, growth expectations and perceived future of the acquiring company. In a conventional deal, a company might acquire another business because it expects £1 billion of cost savings or £2 billion of additional revenue. In technology, the value can be much harder to measure: an acquisition may instead change what investors believe the company could become.
The structure of the deal reinforces this point. xAI remained a wholly owned subsidiary of SpaceX, and the transaction was structured around the existing capital structures of both companies rather than simply folding everything into one operation. Reuters reported that this provided tax and financing advantages while limiting SpaceX's exposure to certain xAI liabilities.
The wider theme is the extraordinary amount of capital now being committed to AI. xAI had already raised $20 billion shortly before the acquisition to fund its infrastructure and AI development. The deal therefore brought a highly capital-intensive business into a company with considerably greater access to capital, just as investors were becoming increasingly willing to fund AI at enormous valuations.
SpaceX's later $60 billion acquisition of Cursor, the company behind an AI coding platform, makes the strategy look even more deliberate. Rather than xAI being a one-off acquisition, SpaceX appears to have been building a broader technology ecosystem around AI, computing and infrastructure.
For investors, that creates both the attraction and the risk. If AI becomes a fundamental part of the global economy, combining models, computing, energy and communications infrastructure could prove extremely valuable. But the $1.77 trillion IPO valuation means investors were already pricing in a large amount of future success. SpaceX's market value therefore depended not only on the strength of its existing businesses, but on whether its increasingly ambitious AI strategy could generate enough economic value to justify those expectations.
That makes the SpaceX-xAI transaction significant beyond Musk's companies. It shows how M&A can become part of a much broader capital strategy: an acquisition can alter the composition of a company, change its growth narrative and potentially make it more attractive to public-market investors before an IPO.
Whether xAI ultimately adds anything close to $250 billion of economic value remains a much harder question. But that may be precisely why the transaction is so revealing. In modern technology M&A, companies are increasingly being valued not only for what they earn today, but for the size of the future they appear capable of building. SpaceX's record IPO suggests investors were willing to buy into that future. The real test is whether the businesses inside it can eventually produce the profits needed to justify it.