Tesla's $2B SpaceX bet fuels merger talk for Musk's empire

Tesla Inc. revealed a $2 billion investment in SpaceX during its first-quarter earnings week, a significant capital flow between Elon Musk’s public and private ventures that intensifies speculation about an eventual merger. The move further blurs the lines between the two tech giants, forcing investors to weigh if they are betting on a car company or a broader technology platform controlled by a single individual.

"As funding needs grow and projects converge...the logic of merging Tesla and SpaceX will keep center stage,” Jefferies analyst Philippe Houchois said in a note to clients this week.

The investment comes as Tesla's own stock has declined 14.1 percent in 2026, underperforming the S&P 500’s 3.9 percent gain. The company is also committing to a massive $25 billion in capital expenditures for 2025, far exceeding the $20 billion analysts had forecast, to build out semiconductor and robotics manufacturing. Meanwhile, SpaceX is reportedly preparing for an initial public offering at a valuation approaching $2 trillion.

For investors, the growing integration forces a re-evaluation of their holdings as a direct bet on Musk's vision rather than on a specific company. The potential combination of the EV maker with the private space exploration firm would create a technology conglomerate of unprecedented scale but also concentrate significant corporate governance and execution risk into a single stock.

A Tale of Two Valuations

The market's willingness to fund Musk's ambitions is being tested. Tesla shares trade at 183 times forward earnings, making it the third-most expensive stock in the S&P 500 and an outlier among the Magnificent Seven, which average a multiple of 27. This rich valuation persists even as analysts have cut Q1 earnings estimates by more than 55% over the past year, according to data compiled by Bloomberg.

In contrast to Tesla's recent stock slump, SpaceX is targeting an IPO that could value it at nearly $2 trillion. The private firm is also making aggressive expansion moves, including a reported $60 billion offer to acquire AI coding-tool startup Cursor. The divergence in perceived momentum and the looming SpaceX IPO threaten to erode Tesla's appeal as the primary vehicle for retail investors to bet on Musk.

Terafab: A Merger in Miniature

The operational crossover between the two companies is already underway. Tesla and SpaceX are jointly developing a semiconductor plant in Texas called "Terafab," a project Musk says will be overseen by independent directors from both companies to ensure fairness.

However, this governance structure highlights the core conflict: Musk is the largest shareholder in both entities. Any formal merger would face intense scrutiny over potential conflicts of interest, though Tesla's shareholders have historically granted him significant latitude. With Musk expected to retain super-voting shares in a public SpaceX, the influence of other shareholders may be institutionally limited from the start.

The Inevitable Musk Premium

Ultimately, the valuation of both Tesla and SpaceX appears disconnected from near-term profitability. Instead, the market is pricing in the long-term execution ability of Elon Musk. Short interest in Tesla has fallen to just 2 percent of its free float, the lowest since February 2025, according to S3 Partners, indicating that bearish bets are waning and the existing investor base remains committed.

"Investors are underwriting a decade-long vision," said Dave Mazza, chief executive officer at Roundhill Investments. As the two companies’ projects in AI, robotics, and manufacturing continue to overlap, the question for the market is shifting from if a merger will happen to when and how to price the single resulting entity.

This article is for informational purposes only and does not constitute investment advice.