Anthropic Leads Prediction Markets for Largest US IPO of 2026

Anthropic is emerging as a frontrunner for the largest U.S. initial public offering of 2026, according to recent prediction-market data.

The potential listing signals a massive shift in the artificial intelligence landscape, as private AI firms move toward public scrutiny and immense capital raises.

Prediction-market participants now assign a higher probability to Anthropic delivering the biggest IPO of 2026 ^[3]. This momentum puts the company ahead of other high-profile candidates, including Elon Musk's SpaceX and rival AI developer OpenAI [2, 3].

The company's trajectory is supported by significant financial growth. Reported revenue for Anthropic has reached approximately $65 billion ^[1], with a valuation currently sitting near $1 trillion ^[1].

This movement toward the public market began earlier in the process. Anthropic submitted a confidential filing for its IPO on June 1, 2024 ^[4]. Confidential filings allow companies to keep their financial data private from the public and competitors until shortly before the offering begins.

While some reports highlight OpenAI as the primary rival in the race to go public, other market data suggests SpaceX is the chief competitor for the title of the year's largest offering [2, 3]. The discrepancy reflects the different ways analysts weigh pure AI growth against the established aerospace infrastructure of SpaceX.

Despite these competing narratives, the current market sentiment favors the AI giant. The scale of the projected offering would be among the largest in history, reflecting the rapid expansion of generative AI into the global economy.