Elon Musk’s repeated public comments on deepening Tesla-SpaceX collaboration have become the main catalyst sustaining trader interest in a potential merger announcement. At the September 2026 All-In Summit, Musk noted the companies’ growing overlap in areas such as Terafab semiconductor development, AI, robotics, batteries, and satellite connectivity, while stressing any combination would require formal board and shareholder processes. Tesla recorded a $1 billion mark-to-market gain on its SpaceX stake in Q2 2026 and continues joint work on energy storage and autonomous systems. SpaceX’s recent wireless spectrum purchases and reported consideration of strategic combinations further fuel speculation. Upcoming catalysts include SpaceX earnings updates, any regulatory filings, and Tesla’s next earnings call, though both companies remain independent with no official deal announced.