Anthropic files confidential S-1 with SEC on June 1, 2026, signaling IPO plans

Anthropic, the company behind Claude, confidentially submitted a draft S-1 to the U.S. SEC on June 1, 2026, marking its first formal step toward an IPO. The company was valued at $965 billion in a $65 billion Series H round held days earlier, while the share count and offering price for the listing have not been determined.