Anthropic files S‑1, IPO seen as almost certain this year

Anthropic filed a Form S-1 with the Securities and Exchange Commission on Monday, bringing its long‑awaited public listing within reach and now viewed as almost certain this year.

What Happened

The filing lists a planned Nasdaq ticker of “ANT”. The S-1 filing, which is publicly available, details Anthropic’s business and financials as it prepares for the IPO.

Market Views

Prediction‑market platform Kalshi shows traders assigning a 95% chance that Anthropic will officially announce an IPO by the end of 2026, defining an official announcement as the SEC making the S‑1 effective, a priced IPO or a ticker being assigned. Kalshi’s definition means an IPO is counted as announced once regulators clear the filing or a market assigns the ticker. Kalshi participants see only a 14% chance the company will begin trading before the week of Nov 16. The Wall Street Journal reports Anthropic aims to start trading the week of Nov 16. On Polymarket, traders give a 69% probability that the firm will list on a public exchange and open for trading by Nov 20. CNBC disclosed a commercial relationship with Kalshi that includes customer acquisition and a minority stake in the platform.

Context

Prediction markets let users bet on corporate events, offering a crowd‑sourced view of likely timing. An S‑1 filing is the first formal step for a U.S. company to go public, and a Nasdaq ticker signals where shares will trade.