SpaceX has reclaimed the top position as the favorite for the largest IPO of 2026 on the prediction platform Polymarket. This shift in sentiment occurred on October 16, following a Reuters report that lowered valuation expectations for its primary competitor, Anthropic.
Investors are now estimating an IPO valuation for Anthropic of approximately $1.5 trillion, down from previous projections of around $2 trillion. This adjustment coincided with the company's third-quarter financial report, which showed revenue of $16.8 billion, a 45% increase from the $11.6 billion recorded in the second quarter.
SpaceX completed its own IPO on June 12, 2026, raising approximately $75 billion with an opening valuation between $1.77 trillion and $1.8 trillion. Anthropic is currently scheduled to begin its IPO roadshow during the week of November 9, with a potential trading debut anticipated for late November.
The Polymarket contract titled Largest IPO by market cap in 2026 tracks these real-time shifts in investor sentiment. While Anthropic previously held a strong position earlier in the summer, the recent report regarding its valuation growth trajectory led bettors to favor SpaceX once again.
