Anthropic has emerged as the sole major private company with greater than 50% odds of officially announcing an initial public offering in 2026, according to prediction market platform Kalshi. As of Monday morning, traders assigned Anthropic a 75% probability of an official IPO announcement this year, defined by the Securities and Exchange Commission declaring a company's S-1 effective, pricing the offering, or assigning a ticker. This stands in stark contrast to other anticipated debuts, including OpenAI, which CEO Sam Altman stated last month did not make sense to pursue publicly amid AI safety concerns, leaving it with only 3% odds for 2026.

The narrowing field reflects broader postponements across sectors. Financial technology firm Plaid saw its odds drop from 50% in January to 10%, while HR platform Deel fell from 50% in February to 3%. Cloud and AI platform Databricks now carries just 1% odds, down from over 50% earlier in the year. Despite these delays, total IPO proceeds have risen sharply due to megacap debuts like SpaceX in June. However, the number of U.S. IPOs priced this year is down 33% compared to 2025, per Renaissance Capital data.

Investor sentiment toward Anthropic faces headwinds despite its leading position on prediction markets. The company confidentially filed a prospectus with the SEC in early June but recently revealed third-quarter revenue of $16.8 billion, indicating weaker quarter-over-quarter growth than previous periods. Analysts noted that revised IPO valuation expectations starting at $1.5 trillion, versus prior estimates of at least $2 trillion, disappointed investors and pressured AI-related equities.