A new SEC filing shows Elon Musk effectively controls 6.4 billion SpaceX shares as of the end of June, representing 48.4% of the company's equity but over 85% of its voting power. The discrepancy comes from a dual-class structure in which just 849 million shares are Class A while the remainder are Class B shares, restricted stock units, or options carrying ten votes each. That concentration makes a Tesla merger using SpaceX currency structurally feasible while leaving Musk in command of the combined entity.
The share count and voting math
The filing breaks down Musk's position with precision: 849 million Class A shares against a Class B pool that delivers super-voting rights. At ten votes per Class B share versus one per Class A, the arithmetic yields voting control north of 85% on an economic stake below half. The source does not disclose the exact split between Class B shares, RSUs, and options, nor the strike prices or vesting schedules attached to the latter two. It also does not state whether any of the Class B shares are pledged.
The Cursor acquisition test case
SpaceX recently closed a $60 billion acquisition of Cursor, the developer of an AI coding agent, and the filing frames the deal as a proof of concept. Even assuming full exercise of all RSUs and options issued in the transaction, Musk's voting power would decline by less than one percentage point. The consideration type for the Cursor deal is not specified in the source, whether cash, stock, or a mix, and no break fee or termination condition is disclosed. The filing treats the minimal dilution of control as evidence that SpaceX can absorb far larger stock transactions without threatening Musk's majority.
The Tesla merger incentive
Musk has stated he wants roughly 25% of Tesla's voting power to steer the company toward AI and robotics; he held just under 20% as of June. A compensation package signed last autumn grants him Tesla shares when certain market-value milestones are hit, and the filing notes that some milestones would be deemed satisfied if Tesla were acquired, with payouts based on the acquisition price. That mechanism lets Musk offer a substantial premium for Tesla using SpaceX shares, receive additional Tesla shares as a result, and surrender less voting control than the headline premium would imply. He controls the SpaceX vote; Tesla shareholders would be incentivized by the premium, assuming they believe SpaceX shares will hold their value.
The SpaceX shareholder downside
Paying a rich premium for a company already trading at a high valuation is unlikely to serve SpaceX shareholders, the filing argues. It points to the xAI acquisition earlier this year as a precedent that appeared favorable to the target's holders but not to SpaceX's. The source does not quantify the xAI premium, nor does it provide SpaceX's current valuation or the implied exchange ratio for a hypothetical Tesla deal. No break fee, go-shop provision, or standstill agreement is mentioned.
What to watch next
Any formal merger proposal will reveal the consideration mix, the premium to Tesla's undisturbed price, and the governance protections, if any, for SpaceX minority holders. The filing makes clear that the decision rests practically with Musk, contingent only on Tesla shareholders accepting the offer. Whether SpaceX's public investors get a vote, and on what terms, remains undisclosed.