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X, xAI, and SpaceX Are One Chain in the Filings. Tesla Is a Different Company.
Mr. Musk posted on March 28, 2025, that xAI had acquired X. SpaceX said on February 2, 2026, that it had acquired xAI. The June 2026 prospectus states those effective dates and an 82.4 percent voting stake. Tesla's October 19 proxy is a separate 19.8 percent.