A brief clause in SpaceX's amended S-1 filing stating the company "may issue a significant amount of equity in connection with future transactions" has ignited speculation about a potential merger with Tesla, with institutional investors and retail shareholders now parsing every word for clues about Elon Musk's next move. The filing, disclosed as SpaceX prepares for what could be the largest initial public offering (IPO) in Wall Street history, sent Tesla stock down 5% in a single trading day, underscoring how seriously the market is taking the possibility.

Why Is a Merger Between Tesla and SpaceX Being Discussed?

The two companies are already deeply intertwined financially and operationally. SpaceX has purchased $697 million in Tesla Megapacks, $131 million in Cybertrucks, and the companies have shared supply chain resources and semiconductor fabrication plans for years. With Musk at the helm of both organizations, the infrastructure for a combination already exists in many ways. The amended S-1 language, while potentially boilerplate in typical IPO filings, has taken on new significance given these existing ties and reports that Musk has been discussing a possible merger with close colleagues.

Gary Black, managing director of The Future Fund, pointed directly to the amended filing on X (formerly Twitter), saying it "strongly suggests more SPCX equity will be issued," which could potentially be used to acquire Tesla. However, the market reaction has been split between those who see the deal as dilutive and those who believe it could actually benefit Tesla shareholders.

How Would a Tesla-SpaceX Merger Actually Work for Shareholders?

The debate hinges on how the deal would be structured and valued. Institutional investors like Black have expressed concern about dilution. Black estimated such a deal could be 28% dilutive to Tesla shareholders, since SpaceX would likely command a significantly higher valuation multiple than Tesla. Institutional investors, he noted, prefer pure plays over conglomerates, which he said "nearly always gravitate to the lowest common multiple".

However, Tesla influencer and retail shareholder advocate AleXandra Merz pushed back on what she called a widespread misunderstanding of how merger-of-equals deals actually work. Rather than simply splitting the difference between two market caps, a merger exchange ratio is negotiated based on relative fair market values, meaning the lower valued company typically sees its stock reprice upward toward the deal value.

"Under her model, SpaceX enters at a $2.5 trillion valuation and Tesla at $1.6 trillion, producing a combined entity worth $4.1 trillion split evenly between both shareholder groups. That implies Tesla's side of the deal would be valued at $2.05 trillion, a gain of roughly $450 billion from its current market cap," Merz explained, citing Dow-DuPont and CBS-Viacom as historical examples of how markets reprice both companies toward the announced exchange ratio after a deal is unveiled.

AleXandra Merz, Tesla Influencer and Retail Shareholder Advocate

The difference between these two scenarios is substantial. Under the dilution model, Tesla shareholders lose value. Under the merger-of-equals model, they gain roughly $450 billion in aggregate value as the market reprices Tesla stock upward to reflect its share of the combined entity.

What Do Retail Investors Think About the Potential Merger?

A retail poll by Tesla influencer Sawyer Merritt offers a snapshot of investor sentiment. The results show mixed enthusiasm: 36% of respondents do not plan to buy SpaceX shares at IPO, and 15.3% say their decision depends on the valuation. This suggests that the merger speculation is already influencing how some investors view the SpaceX IPO opportunity.

Steps to Understanding the Merger Debate

• Understand the Valuation Gap: SpaceX is valued at roughly $2.5 trillion privately, while Tesla trades at around $1.6 trillion, creating a significant difference in how a merger would be structured and who benefits.
• Know the Two Competing Models: The dilution model assumes Tesla shareholders lose value because SpaceX commands a higher multiple, while the merger-of-equals model assumes Tesla stock reprices upward to reflect its share of the combined $4.1 trillion entity.
• Track the S-1 Filings: As SpaceX prepares for its IPO, future amendments to its S-1 filing may provide additional clues about Musk's intentions, making it worth monitoring regulatory documents closely.
• Consider Historical Precedent: Past mergers like Dow-DuPont and CBS-Viacom show that markets often reprice both companies toward the announced exchange ratio after a deal is unveiled, which could support the merger-of-equals thesis.

What Else Is Happening With SpaceX's IPO?

Beyond the merger speculation, SpaceX has been making headlines for other reasons. Musk recently denied reports that SpaceX had reduced its target IPO valuation to at least $1.8 trillion from previous ambitions exceeding $2 trillion, responding with a single word, "False," to a post from ZeroHedge that cited Bloomberg sources. This swift rebuttal underscores Musk's ongoing effort to manage speculation surrounding one of the most anticipated market debuts in recent history.

SpaceX's strong fundamentals support investor enthusiasm. The company generated $18.7 billion in revenue in 2025, with particularly strong growth from Starlink, its satellite internet service. However, the company faces substantial investments and losses tied to ambitious projects like Starship development and artificial intelligence initiatives.

Meanwhile, Tesla is also making progress on its own growth initiatives. The company was recently granted authorization by the State of Texas to operate driverless vehicles in a commercial manner, marking a significant step toward its robotaxi ambitions. This development suggests that even without a merger, both companies are pursuing transformative technologies that could reshape their respective industries.

The coming weeks will be critical. SpaceX is preparing to file its full S-1 with the Securities and Exchange Commission (SEC), which could provide clearer insights into the company's strategy and financial health. As that process unfolds, investors will be watching closely for any additional language that might signal Musk's intentions regarding a potential Tesla combination. Whether the merger happens or remains speculation, the market has already begun pricing in the possibility, making this one of the most closely watched corporate developments in recent memory.