For roughly 15 years, the sole publicly traded vehicle tied to Elon Musk was Tesla. That changed when Space Exploration Technologies Corp. debuted on June 11, 2026, giving investors a second Musk-linked stock to choose from. Since the IPO, SpaceX has climbed 9.8% above the $135 offer price, and performance charts normalized to June 11 show a clear divergence between the two companies.
In the three months after SpaceX listed, Tesla shares slipped 8.9% while the S&P 500 advanced 2.7%. "Investors have treated SpaceX as the cleaner growth story and Tesla as the riskier turnaround bet," said Lale Akoner, a global market strategist at Etoro. Concerns about a diluted "Musk premium" have been around since early talk of a 2026 SpaceX IPO, and the split in returns suggests that worry has turned into real positioning.
Tesla has not helped its own cause. Its July earnings report sparked a drop of more than 20% over the next five sessions as worries grew about rising capital spending. The company also rolled out its long-awaited self-driving Cybercab last week, a launch that disappointed investors and drew a federal regulatory probe.
Even a strong beat on second-quarter vehicle deliveries failed to lift the shares. Meanwhile, the company's push toward physical AI products still needs clearer proof points to win back skeptics.
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SpaceX's lead over Tesla is not guaranteed. Both companies still have to turn big promises into sales - Tesla with self-driving cars and its Optimus robots, SpaceX with orbital data centers. "SpaceX now has to prove a $100 billion run rate is real, and Tesla has to prove it is more than the Musk stock people held before SpaceX was available," said Dave Mazza, who serves as CEO at Roundhill Financial; the firm holds stakes in both Tesla and SpaceX. For everyday investors, the signal to watch is simple: do those new products start showing up as revenue, or do they stay as headlines?
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