Tesla and SpaceX Want to Merge. Your Vote Counts Even If You Don't Cast It.
Tesla and SpaceX are exploring a $3.5 trillion merger, the largest ever. It needs a majority of all Tesla shares, so a share that doesn't vote counts as no. Here is what holders would own, who would control it, and what to watch.
Elon Musk confirmed on Oct 20 that Tesla and SpaceX have formed committees to explore a merger worth about $3.5 trillion combined, the largest in history. He also set a rule most coverage skimmed past: it needs a majority of all Tesla shares, not just the shares that vote. That makes every passive holder part of the decision.
HeyTheo Research · Wednesday, October 21, 2026
Quick Read
Tesla (TSLA) and SpaceX (SPCX) each formed special committees of independent directors on Oct 20 to study a merger. Musk says he is recused. No deal, price or vote date exists yet.
At current values, SpaceX is worth more than $2 trillion and Tesla nearly $1.5 trillion. A tie-up would be the largest corporate combination ever.
Approval needs at least 50% of all outstanding Tesla shares. Shares that don't vote count the same as a "no."
SpaceX rose about 8% after hours on the news and its first quarterly profit, $4.4 billion. Tesla rose about 2%. Tesla reports its own results on Oct 21.
What was actually announced
On Tuesday, Oct 20, Musk said both companies had set up special committees to discuss a combination. He called it "a good idea" with "a lot of merit," citing shared work on AI, chips, robotics and connectivity. He also warned that some people "assume that a SpaceX and Tesla merger is a certainty." It is not.
Detail | Status |
|---|---|
Special committees | Formed at both companies, Musk recused |
Merger agreement | None |
Price or exchange ratio | None |
Approval needed | At least 50% of all outstanding Tesla shares |
SpaceX value | More than $2 trillion |
Tesla value | Nearly $1.5 trillion |
Combined | About $3.5 trillion |
Source: Axios, Al Jazeera, Tech Insider, market data as of Oct 20, 2026
For scale: SpaceX's own merger with xAI in February valued the combination at $1.25 trillion. This one would be nearly three times that.
The detail that matters most for Tesla holders
Most shareholder votes need a majority of the shares that are actually voted. If turnout is low, a small group can carry the result.
Musk set a stricter bar: 50% of all Tesla shares outstanding. Under that rule, a share that sits in an account and never votes works exactly like a "no." He called it "quite a high hurdle."
That matters for Tesla more than most companies, because a large share of its stock is held by individuals who often don't vote. If the deal happens, it will be because enough ordinary holders actively said yes.
Research cue · try it in HeyTheo
Ask Theo for the bull case, bear case and what to watch on Tesla, and add: "what would a SpaceX merger change about how Tesla is valued?" It separates the car business from the AI and robotics story the market is already paying for. Open HeyTheo
Start with: search TSLA, then ask the question above.
What a Tesla holder would own
There is no exchange ratio yet. But the current values give a rough starting point. At about $1.5 trillion out of $3.5 trillion, Tesla holders as a group would own roughly 43% of the combined company, and SpaceX holders roughly 57%. The final split will depend on what the committees negotiate, and that negotiation is the part to watch.
Control is the other question. Barclays estimates Musk would own about 37% of a combined company and hold about 56% of the voting power, depending on terms. Today, Tesla shareholders vote on a company Musk does not control by majority. After a merger, they might not.
There is also history. In 2016, Tesla bought SolarCity, another company tied to Musk and his family, and critics argued for years over whether that deal was fair to Tesla holders. The same question will follow this one: can a committee be fully independent when one person leads both sides?
Research cue · try it in HeyTheo
Build a basket of Tesla and SpaceX and track how they move together through the committee process. If SpaceX rises on merger headlines while Tesla lags, the market is pricing the deal as better for SpaceX holders. Open HeyTheo
Start with: search TSLA, then add SPCX to the same basket.
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Why the companies say it makes sense
The AI link. Tesla's robotaxis and humanoid robots need AI models and chips. SpaceX, after absorbing xAI, builds AI models. Barclays argues a combined company could simplify Musk's planned chip-making project and tie the businesses together.
The profit link. SpaceX just reported its first quarterly profit: $4.4 billion for July to September, against a $1.05 billion loss a year earlier. Its Starlink and launch businesses bring cash that Tesla's AI spending could use.
The counterpoint. Tesla's own value already leans heavily on robotaxis and robots that are not yet large businesses. Adding a $2 trillion space and AI company does not make those arrive sooner. It makes the combined stock a bet on Musk's whole portfolio, which some holders want and some do not.
What to watch next
Tesla's results on Oct 21. The first earnings call since the announcement. Listen for any timeline or comment from the board.
Committee advisers and fairness opinions. Who the committees hire will show how seriously each side is negotiating.
Tesla's Dec 3 shareholder meeting. A separate vote, but a test of how engaged Tesla's holders are.
An exchange ratio. Until there is one, every number is an estimate.
Research cue · try it in HeyTheo
Set a trigger on Tesla: "tell me when a merger agreement, exchange ratio or vote date is announced." Then use the backtester to see how Tesla traded after past major Musk announcements. It shows how much of a headline the stock tends to keep. Open HeyTheo
Start with: search TSLA, then set the announcement trigger.
Research it yourself: rules HeyTheo tracks
Merger-pair basket. Two stocks in a proposed deal tracked against each other, to see which side the market thinks gains more.
Corporate-event trigger. Flags any holding with a merger agreement, vote date or special committee news.
Governance trigger. Flags changes in insider ownership or voting control at companies you hold.
Ask Theo. Try: "Give me the bull and bear case on Tesla if it merges with SpaceX" or "How has Tesla traded after past Musk-related deals?"
Check the rule behind any trigger before acting on it. You trade through your own broker; HeyTheo helps you decide.
The Silent Vote
A $3.5 trillion merger will not be decided by Musk or by the committees alone. It will be decided by whether half of all Tesla shares say yes, and a share that stays silent counts as no.
For Tesla holders, that turns a headline into a decision. Watch for the exchange ratio, the control terms and the board's process. And if you hold the stock, plan to vote.
Start your own first pass. Download HeyTheo, add Tesla and SpaceX, and run the three cues above. Get the app
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Sources
Axios, Al Jazeera, Tech Insider, Barclays, CNN, NBC News, Gizmodo
Disclaimer
Disclaimer: HeyTheo is a research and education platform, not an investment adviser or broker-dealer. Nothing here is advice to buy, sell, or hold any security. You trade through your own broker; HeyTheo helps you decide. Backtested results are hypothetical and do not guarantee future returns. References to governments, officials, or policies are for market context only and are not political endorsements. All investing involves risk, including loss of principal. Data is as of the dates noted.
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