SpaceX × Tesla: Who Wins in an All-Stock Merger?

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Download SpaceX × Tesla Merger Model v1.2.2 (.xlsx) · 279 KB · Data and reference prices as of October 26, 2026

Read the Read Me tab first. This independent illustrative model evaluates a hypothetical all-stock transaction in which SpaceX issues one-vote Class A shares to Tesla holders. No merger terms have been agreed. The end-2026 closing, exchange ratio, premium, award treatment and synergies are all assumptions.

A combination can create value and still leave one side worse off

Under the Base assumptions and a 20% premium to Tesla’s reference price, the combined company is worth approximately $1.331 trillion, or $50.68 per combined share. Modeled synergy value is $141.46B. Yet existing SpaceX holders receive about 18% less value per share than in the standalone model, while Tesla holders receive about 96% more than their modeled standalone value.

Those gains and losses compare model values with model values; they are not predicted market returns. The question is how much value the operations create, how much the buyer pays and how the share exchange divides the result.

Base case: the exchange and the value

SpaceX standalone: $878.51B equity value; $61.895 per diluted share.
Tesla standalone: $312.35B equity value; $78.731 per diluted share.
Combined: $1,331.16B equity value; $50.682 across approximately 26.265B diluted shares before future funding shares.
Exchange ratio: approximately 3.0476 SpaceX shares per Tesla share, using reference prices of $147.49 and $374.58 and an assumed 20% premium.
Former Tesla holders: approximately 46.0% of the combined diluted shares before future funding.

Per-share figures use different share counts for the two standalone companies and the combined company. Compare Tesla’s value received through the exchange ratio, rather than comparing a Tesla share directly with one combined share.

Synergies must cover the price paid

The model keeps two break-even questions separate. On a market basis, both standalone companies are marked at the reference market prices: SpaceX holders need $297.22B of synergy value to break even, equal to the dollar premium. On a model basis, they need approximately $436.02B because the reference-price exchange ratio differs from the relative standalone model values. Base synergy value of $141.46B falls below both thresholds.

The market-basis view capitalizes synergies using the model’s assumptions. It is a conditional deal test, not a claim that the market would immediately recognize that value.

Operating value needs a funded cash path

The forecasts run from 2026 through 2030. SpaceX is divided into Connectivity, SI (AI, X and compute cloud), and Space. Tesla is divided into Automotive, Energy, Services, and Autonomy & Optimus. The 2026 estimate combines nine reported months with an assumed Q4.

Two enterprise-value methods are blended 50/50: a discounted multiple of 2030 after-tax operating profit, and a discounted multiple of 2030 unlevered cash flow. Both include interim unlevered cash flow. They share the same forecasts, so the blend is not independent confirmation. Net cash, tax attributes, funding fees and equity issuance effects are handled separately.

Cash and debt are tracked with interest on average balances, refinancing assumptions, minimum cash, debt/equity financing, fees and issuance discounts. Base cumulative gross funding through 2030 is approximately $101.51B for standalone SpaceX and $33.95B for the combination. These are funding requirements under the assumptions, not committed financing. Interest affects liquidity; valuation uses an assumed cost of capital rather than deducting interest again from unlevered cash flow.

Execution risk has its own funding and validity tests

The separate execution case realizes 75% of synergy benefits, includes $1B of annual dis-synergies at full run-rate and adds $3B of integration capex. Base combined value falls to $48.685 per share, with its own gross funding requirement of $39.284B.

Each execution case checks its own 2030 after-tax profit, cash flow, values under both methods, equity value and funding limit. Cases that fail remain unresolved. The model does not convert invalid terminal economics into a positive share price or assign a cash-only liquidation recovery.

What Tesla’s reference price requires from Autonomy & Optimus

Base Tesla value with no Autonomy & Optimus is approximately $51.82 per share in a full counterfactual rerun. To match the $374.58 reference price while holding the other Base assumptions, the model scales the entire A&O revenue path until 2030 revenue reaches approximately $239.86B, versus $20B in the Base forecast. Under Bull assumptions, the corresponding solve is $83.78B, versus an $80B forecast.

These are conditional backsolves, not revenue forecasts. The scale is solved outside the workbook; a live gap check indicates whether it still matches the reference price after inputs change.

Compare resolved scenarios without hiding the unresolved downside

Bull values are $318.97 per SpaceX share, $363.33 per Tesla share and $242.13 per combined share. Bear remains unresolved and probability-weighted valuation is n/a. Base and Bull are resolved scenarios, not a complete valuation range. A separate Managed downside case illustrates spending cuts with lower exit multiples and is not probability-weighted.

Use the workbook

Read the Read Me, then inspect Historicals, Inputs and the dated share-count estimates.
Compare standalone value with the value each holder receives through the exchange.
Change premium, synergies, capex, margins and funding assumptions; inspect the execution case alongside the headline.
Review cash, debt, tax pools, dilution and validity flags before relying on a share price.
Read Deal for issued, contingent-excluded, diluted and voting ownership views, then consult Change Log.

Control and award treatment are separate from valuation

Under the assumed one-vote Class A issuance and continuation of Tesla awards, Musk directs approximately 74.9% of post-deal votes. Unearned Tesla award shares retain proportional voting in the model; this is an assumed conversion term. Economic ownership and voting power are shown separately.

The Tesla 2025 award’s change-in-control calculation is a conditional alternative. The filed terms use immediately pre-close shares multiplied by the greater of the last closing price or per-share deal consideration. Using the model’s current share count and prices, a 20% premium reaches no tranche; a 40% premium reaches one. The first-tranche premium of approximately 35.1% is conditional on those inputs and on the provisions applying. The award’s $334.09-per-share offset is disclosed; continuation is the headline assumption, not an agreed deal term.

The main limitations

Terminal dependence: discounted exit value represents approximately 106% and 114% of Base combined operating value under the two methods, because interim cash flow is negative.
Asset lives: blended lives materially affect depreciation, profit and the profit-multiple valuation. Sensitivities are provided; compute and facilities are not separate asset pools.
Share estimates: SpaceX exercise prices and acquisition-award inclusion are assumptions. Undisclosed movements remain unreconciled residuals. Tesla’s approximately 15M incremental awards assume overlap between the EPS increment and already-issued restricted shares; 301M is retained as a sensitivity.
Tax simplifications: ownership-change limits, eligible expensing, future income, attribute expiry and state taxation are assumption-dependent. The illustrative limit is not a legal estimate.
Deal and financing: actual exchange terms, award treatment, approvals, financing availability and closing date are unknown. Synergy delay changes benefit timing; a true delayed closing with separate financing is not built.
Forecast limits: working capital defaults to zero. Revenue, margins, capex, synergies and exit multiples require independent judgment. Funding uses annual balances; equity issuance uses a disclosed present-value approximation.

This is educational scenario analysis, not a fairness opinion, investment recommendation, legal or tax advice, or company guidance.

Sources and version

Historical inputs and disclosures: SpaceX Q3 2026 Form 10-Q, Tesla Q3 2026 Form 10-Q, the SpaceX IPO prospectus and earnings materials, Tesla’s 2026 proxy, and Tesla’s 2025 CEO award agreement. Dated source inputs and assumptions are documented in the workbook. Published by Mike Ye; no SpaceX or Tesla affiliation or endorsement.

Locked version 1.2.2 · October 26, 2026. The latest update gave the execution case its own validity checks, separated contributed capital from dilution loss, and qualified the award disclosures. No commercial assumptions changed in that update. The model will be updated when actual deal terms or other material disclosures arrive; see Change Log for the full history.