Elon Musk has reignited speculation that Tesla and SpaceX could eventually merge after declining to rule out combining the companies during an appearance at the All-In Summit.
Asked why the two businesses remain separate despite their growing collaboration, Musk replied: 'With all this collaboration, on so many levels, who can imagine what action one might take when there's so much close collaboration in so many areas.'
The SpaceX–Tesla merger talk is speculative but Elon Musk points to deep collaboration
— Worth Watching (@WorthWatchng) September 19, 2026
"Elon, why do you why do you still have two separate companies? Yeah. Yeah, great. Great question. Wow. Nobody's gonna ask that one. Yeah, uh good point. You know, with all this collaboration,… pic.twitter.com/AiX9Tj73hz
It was a suggestive answer, not a merger announcement. Musk gave no timetable, transaction structure or indication that either company had begun a formal merger process.
The comment revived a question that has followed the two companies as their operations increasingly overlap: could closer collaboration eventually lead to one corporate structure?
Musk Leaves the Merger Question Open
Musk appeared at the All-In Summit on 15 September alongside SpaceX President and Chief Operating Officer Gwynne Shotwell. The discussion covered artificial intelligence, Starship, Terafab and the possibility of combining Tesla and SpaceX.
Asked why the companies remained separate, Musk called it a 'great question' before pointing to their growing collaboration.
— Muskonomy (@muskonomy) September 15, 2026
His wording stopped short of saying a merger was being planned. It could refer to a future combination, a deeper commercial relationship or another form of corporate cooperation.
Shotwell also described growing integration across Musk's businesses, saying SpaceX personnel had moved into xAI to fill leadership and engineering gaps. She said the businesses were integrating 'faster than I thought', while adding that they were 'not fully integrated yet'.
Her comments show increasing overlap across Musk's corporate network, but do not establish that Tesla and SpaceX are preparing to merge.
Terafab Brings the Companies Closer
Tesla and SpaceX are already working together on semiconductor technology, computing and manufacturing. Their joint Terafab project is planned as a large-scale chip manufacturing facility in Grimes County, Texas, intended to support computing demands across Tesla and SpaceX.
The companies have also developed overlapping interests in artificial intelligence, robotics and advanced computing. Tesla is developing autonomous-driving systems and humanoid robots, while SpaceX is expanding Starlink and its launch operations.
That cooperation does not require a merger. Companies can share technology, employees and infrastructure while remaining legally separate.
The distinction matters because Tesla and SpaceX now have different businesses, shareholders and corporate structures. A combination would bring electric vehicles, robotics and energy together with rockets, satellites and space infrastructure under one company.
Musk Has Raised the Idea Before
The latest comment was not Musk's first public discussion of a possible combination.
During Tesla's 22 July earnings call, Musk said there was 'more and more overlap' between Tesla and SpaceX. He also said the companies could not discuss combining during an earnings call and that any such move would require 'the appropriate process'.
That earlier remark came shortly after SpaceX became a publicly traded company. Its Class A shares began trading on Nasdaq on 12 June under the ticker SPCX, with the company later reporting gross IPO proceeds of about $85.7 billion (£64.59 billion).
The timing means any future combination would now involve two publicly traded companies rather than a public Tesla and privately held SpaceX.
A Merger Would Require More Than Musk's Approval
Any formal transaction would have to address valuation, ownership, governance and the interests of shareholders in both companies.
Musk's overlapping interests across his businesses could also make the structure and approval process particularly significant. But none of those considerations establish that a deal is being negotiated.
For now, the evidence is limited to increasingly close cooperation and Musk's refusal to shut down the merger question when asked directly.
No merger agreement, exchange ratio, completion date or formal transaction has been announced.
Musk has kept the possibility alive. His remarks, however, do not establish that Tesla and SpaceX are preparing to become one company.
