Wall Street Puts 80% Odds on a Tesla-SpaceX Merger That Would Create a $3.4 Trillion Empire
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Elon Musk has discussed with close colleagues the possibility of merging Tesla and SpaceX, and Wall Street is starting to price that scenario in. On May 31, 2026, Fortune published a detailed analysis of the deal mechanics — the same week that SpaceX filed its S-1 targeting a $1.75 trillion IPO valuation, the largest in history. Wedbush Securities analyst Dan Ives put the odds of a merger at 80 percent by early 2027. The math, however, tells a more complicated story.
The Numbers Behind a $3.4 Trillion Combination
Tesla currently trades at $441.72 per share with a market capitalization of roughly $1.65 trillion. SpaceX's S-1, filed May 20, targets $1.75 trillion — putting a combined entity at approximately $3.4 trillion, which would eclipse any company currently listed on U.S. exchanges.
| Entity | Valuation | Key Metric |
|---|---|---|
| Tesla (TSLA) | $1.65 trillion | Q1 2026 revenue: $22.4B (+16% YoY) |
| SpaceX (SPCX) | $1.75 trillion (target IPO) | 2024 net profit: $791M; 2025 FCF: -$14B |
| Combined entity | ~$3.4 trillion | Pro-forma: ~$1B annual loss at launch |
The financial profile of a merged company would be strained from day one. SpaceX's free cash flow deficit ran $14 billion last year as it absorbed Starship development costs and scaled Starlink. Tesla's own capex projections for the remaining nine months of 2026 come in at $22.5 billion. David Trainer, CEO of research firm New Constructs, characterized the combined entity's 2035 performance requirements as “a kind of suspended disbelief, squared” — projecting the merged company would need $248 billion in net income and $1.1 trillion in revenues by that year to justify current valuation.
How the Deal Would Be Structured
Based on current share counts, SpaceX would need to issue approximately 94% additional shares — growing its outstanding count from 4.1 billion to roughly 8 billion — to acquire Tesla at no premium. Any takeover premium would require even more dilution. That math makes a stock-for-stock deal uniquely punishing for existing SpaceX shareholders.
“This is the only way to bail out Tesla shareholders.” — David Trainer, CEO, New Constructs
Governance presents its own complications. Musk holds 42% equity in SpaceX but commands 85% voting power through super-voting shares. A merger structured as SpaceX acquiring Tesla would convert public Tesla holders into SpaceX Class A stock with substantially reduced voting rights — a structure that legal experts say doesn't raise antitrust issues but could draw shareholder challenges.
Why the Speculation Is Intensifying Right Now
The timing is not coincidental. SpaceX's S-1 filing on May 20 brought the IPO question into focus, and Tesla's own Q1 2026 10-Q disclosed a $2 billion equity investment in SpaceX — a figure that raises questions about related-party dealings regardless of whether a full merger materializes. Electrek noted on May 27 that a merger would represent Musk's fourth billion-dollar self-dealing transaction involving Tesla and his other ventures, following earlier controversies around SolarCity, xAI, and X.
Prediction markets sit well below the Wedbush estimate. Kalshi bettors currently place the probability of a merger announcement by May 2027 at 52% — meaningful, but far from certain. A near-term announcement by June 30 sits at just 4.6%.
What Tesla and SpaceX Share — and Where They Diverge
The operational synergies are real. Tesla and SpaceX already share engineers, collaborate on power and compute constraints, and are jointly building a semiconductor research fab at Gigafactory Texas. Tesla's energy storage division and SpaceX's Starlink terminals have overlapping supply chains. The two companies are arguably more integrated today than many separately traded subsidiaries.
The divergences are also real. SpaceX is a defense and launch contractor with government relationships that would complicate a merger with a publicly traded EV maker under Musk's control. Tesla's institutional shareholders — many of whom bought in on EV and energy theses — would face an entirely different risk profile in a combined entity.
The Bottom Line for Tesla Investors
The merger discussion is now mainstream, not fringe. When Wedbush — one of Tesla's most consistently bullish research desks — puts the odds at 80%, institutional desks will model the scenario whether they believe it or not. For Tesla shareholders, the immediate question is less about whether it happens and more about what price a deal would require: SpaceX taking Tesla at a premium would benefit TSLA holders; SpaceX absorbing Tesla at a discount to bail out SpaceX's capital needs would not. Neither outcome is yet priced with confidence.
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