Tesla‑SpaceX merger talks heat up as SpaceX prepares $1.5 trillion IPO

Elon Musk’s two flagship companies are again the subject of merger speculation, as SpaceX’s upcoming IPO filing and growing operational ties with Tesla have sparked fresh Wall Street chatter. The discussion centers on whether a formal combination would be structured as SpaceX acquiring Tesla, or as a broader consolidation of Musk’s technology empire [1].

Key takeaways

• SpaceX filed an S‑1 on May 20, 2026, targeting a $1.75 trillion valuation, the largest IPO in history [1].
• Tesla disclosed a $2 billion equity investment in SpaceX and joint work on a semiconductor fab at Gigafactory Texas [1].
• Analysts see an 80% chance of a Tesla‑SpaceX tie‑up, while betting markets assign a 48% probability to a SpaceX‑xAI merger and only 15% to a Tesla‑SpaceX combination [3][4].
• SpaceX would go public as a controlled company with dual‑class shares, giving Musk 85% voting power despite holding 42% equity [1].
• A merger would shift Tesla shareholders into a lower‑voting class and expose them to SpaceX’s launch and Starlink cash flows, raising governance and valuation questions [1].

Growing operational overlap and financial links

SpaceX’s S‑1 reveals revenue of $18.7 billion in 2025, with Starlink contributing $11.4 billion (61%) and subscriber numbers rising to 10.3 million by Q1 2026 [1]. Tesla’s Q1 2026 report showed revenue of $22.39 billion, a 15.8% year‑over‑year increase, and an automotive gross margin expansion to 21.1% [1]. The two firms already share engineering talent and have collaborated on energy and computing projects, including a joint semiconductor research fab at the Texas Gigafactory and a “Terafab” plant in Austin aimed at one terawatt of computing capacity per year [1][3].

Musk’s consolidation strategy also includes the folding of xAI into SpaceX and the earlier integration of SolarCity into Tesla, creating a network of cross‑owned assets. SpaceX’s IPO will be under a dual‑class structure: Class B shares carry ten votes each and will elect a majority of the board, giving Musk dominant control [1]. If a merger proceeds with SpaceX acquiring Tesla, Tesla shareholders would convert to Class A stock with far less voting power than they currently enjoy under a one‑share‑one‑vote system [1].

Market expectations and analyst views

Wall Street analysts are closely watching the merger odds. Wedbush analyst Dan Ives estimates an 80% likelihood of a Tesla‑SpaceX tie‑up, citing the “connective tissue” already forming between the companies [3]. Betting markets on Polymarket show a 48% probability of a SpaceX‑xAI merger and only a 15% chance of a direct Tesla‑SpaceX combination, indicating that investors see the xAI link as more probable in the short term [4]. The IPO could raise up to $50 billion, potentially valuing SpaceX at $1.5 trillion, which would dwarf the $1.66 trillion market cap of Tesla at the time of reporting [4].