The US IPO market is about to get very loud. SpaceX, Anthropic, and OpenAI are all racing toward public listings in 2026, carrying combined valuations that could exceed $3.5 trillion.
The trillion-dollar lineup
SpaceX is targeting a June 12 trading debut, with its IPO priced around June 11. The company’s estimated valuation sits at approximately $1.75 trillion, and demand has reportedly exceeded available shares.
Then there’s Anthropic. The Claude-maker confidentially filed for a US IPO on June 1, fresh off a late May fundraise that pegged its post-money valuation at around $965 billion.
OpenAI has also confidentially filed for its own listing. The Sam Altman-led company was recently valued at over $850 billion. Between these three companies alone, we’re looking at roughly $3.5 trillion in potential new market capitalization hitting public markets in a compressed window.
