The Tesla-SpaceX Merger Test for Mega-Cap Accountability

The Deal That Wasn’t Yet a Deal

Elon Musk announced on a SpaceX earnings call last week that special committees of independent directors at Tesla and SpaceX are exploring a merger. The combined company would be worth roughly $3.5 trillion at current market valuations — a figure that puts it ahead of Apple’s peak market cap and larger than the GDP of every country except the United States, China, Germany, Japan, India, and the United Kingdom.

Musk called himself a “conflicted party” and said he couldn’t take part in the discussions. He also said it would be “overstating it” to call the merger a certainty, describing the situation as “tap-dancing through a minefield.” That’s generous language for what is, structurally, an unprecedented concentration of corporate power in a single person’s hands.

The non-obvious implication isn’t that the merger will happen. It’s that the very question forces America’s capital markets to confront something they’ve been sidestepping for years: when one individual controls companies spanning automotive manufacturing, aerospace, artificial intelligence, and social media, the traditional mechanisms of corporate accountability — boards, shareholders, regulators — don’t just struggle to check that power. They were designed without it in mind.

The Governance Architecture

SpaceX’s public offering in June revealed the architecture clearly. The company priced shares at $135 and began trading under the ticker SPCX. Musk retained about 4.8 billion shares plus 350 million options exercisable at $8.39 each. He owns roughly 45% of the company but controls approximately 82% of its voting power through a multi-class share structure where Class B shares carry 10 votes apiece.

Only Class B holders can remove Musk as CEO, chairman, or director.

SpaceX invoked the “controlled company” exemption under Nasdaq rules, which allows firms with majority control by a single party to operate without a majority-independent board or independent nominating and compensation committees. The company also reincorporated from Delaware to Texas in 2024, moving its charter provisions that push shareholder claims into mandatory arbitration and limit derivative suits to investors holding at least 3% of the stock — a stake worth tens of billions of dollars at current valuations.

CalPERS and the comptrollers of New York City and New York State wrote to SpaceX in May warning that the structure “would constitute the most management-favorable governance structure ever brought to the U.S. markets at this scale.” They were not exaggerating.

Meanwhile, SpaceX’s board set aside 1 billion super-voting shares for Musk that vest only if the company hits market-cap milestones of up to $7.5 trillion and establishes “a permanent human colony on Mars with at least 1 million inhabitants.” The upside, should those conditions ever be met, is incomprehensibly large.

Transactions Between Musk’s Own Companies

The accountability problem isn’t hypothetical. It has already played out in transactions between companies Musk controls.

In November 2025, Tesla shareholders voted on a nonbinding proposal asking the carmaker to invest in xAI, Musk’s artificial intelligence startup. About 1.06 billion shares voted in favor, 916.3 million against, and more than 473 million abstained. Tesla’s bylaws count abstentions as votes against, so the measure failed. Bloomberg reported the result.

Tesla disclosed a $2 billion investment in xAI anyway in January. “We’re just doing what shareholders asked us to do, pretty much,” Musk said. Days later, SpaceX acquired xAI in a deal that valued the combined entity at $1.25 trillion.

Tesla also conducted more than $573 million in business with Musk-controlled companies during fiscal 2025, according to an SEC filing analysis by Transparency Lab. That included $430.1 million in Megapack battery sales to xAI and $143.3 million in Cybertruck sales to SpaceX. Tesla’s audit committee deemed these transactions to be at arm’s length. The analysis does not allege illegal conduct. But the pattern is instructive: value is moving between companies where the same person sits at the center, and the checks that should catch conflicts of interest have proven porous.

The Regulatory Record

Federal regulators have shown remarkable difficulty imposing meaningful consequences on Musk. The pattern is consistent across agencies and issue areas.

In 2018, Musk tweeted from Tesla’s Texas factory that workers could unionize but “why pay union dues & give up stock options for nothing?” The National Labor Relations Board ruled the post was an illegal threat and ordered its removal. A Fifth Circuit panel upheld the decision in 2023. The full court reheard the case in January 2024 and ruled 9–8 in October that the NLRB lacked the authority to order the tweet removed, invoking the First Amendment. The labor violation stood in principle but carried no enforceable remedy.

The Securities and Exchange Commission sued Musk in January 2025, alleging he delayed disclosing his Twitter stake and cost other shareholders more than $150 million. He settled for a $1.5 million penalty without admitting wrongdoing. U.S. District Judge Sparkle Sooknanan approved the settlement in July despite expressing “serious misgivings,” writing that the court is “not a rubber stamp” but could only reject deals that were clearly unreasonable. A $1.5 million penalty for allegedly costing investors $150 million is not a figure that alarms people who move trillions.

Safety at Starbase

The accountability gap extends to physical safety as well. A TechCrunch analysis of OSHA data found that SpaceX’s Starbase facility in South Texas recorded 4.27 injuries per 100 workers in 2024 — nearly six times the average for comparable space-vehicle manufacturers and almost triple the 1.6 rate for aerospace manufacturing overall. United Launch Alliance and Blue Origin, SpaceX’s closest rivals, reported rates near 1.1.

NASA is paying SpaceX more than $4 billion for two crewed Starship landings on the moon. But under NASA contract terms, a high injury rate alone doesn’t trigger enforcement action and doesn’t meet the definition of a “major breach of safety,” which is reserved for events like a fatality or a willful or repeat OSHA violation.

In January, OSHA cited SpaceX for seven “serious” violations following a crane collapse at Starbase in June 2025, assessing penalties totaling $115,850. SpaceX is contesting them. On May 15, a worker died at the site. OSHA opened an investigation and said it could take months to complete.

The point isn’t that SpaceX is uniquely dangerous. It’s that the legal and contractual frameworks governing these companies treat penalties as costs of doing business rather than deterrents — and that framework becomes far more consequential when the business is worth trillions.

What Changes If This Merger Happens

A Tesla-SpaceX merger would not create a single new company overnight. The governance questions would multiply. How do two multi-class share structures interact? Who controls the combined board? What happens to the controlled-company exemptions when both entities claim them?

Musk said a merger would require approval from a majority of all outstanding Tesla shares — “quite a high hurdle,” as he put it. Tesla’s annual proxy, filed recently, includes no merger proposal. The special committees are exploring, not deciding.

But the mere fact that the exploration is happening at this scale changes the calculus for everyone else. Antitrust enforcers are still working through the implications of mega-cap consolidation in software and platforms. A merger spanning hardware manufacturing, space launch, and artificial intelligence introduces dimensions that existing frameworks barely address. There is no precedent for a $3.5 trillion company where one person controls 82% of voting power and sits at the center of transactions between his own firms.

The broader implication is institutional. SpaceX’s IPO made Musk the world’s first paper trillionaire — a status that has fluctuated but never disappeared. About 4,400 SpaceX employees stood to become millionaires when trading began, according to the New York Times. The wealth creation is real and widespread within the company. But the governance structure ensures that the creation and distribution of that wealth answers to no one outside Musk’s direct control.

California has only 19 countries with larger GDPs. A single corporation larger than most of them, governed by a structure designed to insulate its founder from shareholder pressure, regulated by agencies that have repeatedly lost, and overseen by a board that can’t be removed without the founder’s consent — that is the landscape a Tesla-SpaceX merger would make permanent. The minefield Musk says he’s tap-dancing through isn’t made of his own making. It’s the one America’s institutions built around him, one concession at a time.