Anthropic Files Public S-1 for November IPO, Disclosing $80.7 Billion First-Half Loss and $450 Billion in Cloud Commitments

Anthropic is set to file its S-1 registration statement publicly at 9 a.m. ET on Monday, October 27, moving the Claude maker closer to what could be a record-breaking debut on public markets. According to Fox Business, the IPO is potentially targeted for November 19-20, giving investors their first formal look at the company's financials ahead of a roadshow expected to begin as early as mid-November.

The draft S-1, reviewed by The Wall Street Journal, reveals a net loss of $80.7 billion for the first half of 2026, a dramatic widening from the $13 billion loss recorded in the same period a year earlier. The filing also discloses $450 billion in non-cancelable cloud commitments, underscoring the enormous infrastructure costs underpinning the company's AI development.

News of the filing lifted semiconductor stocks on Monday, reflecting improved sentiment toward AI-related equities. The offering is widely viewed as a critical test of investor appetite for AI valuations at a moment of growing scrutiny over infrastructure spending and financing costs, and its reception will serve as a barometer for the broader AI investment thesis heading into 2027.