Anthropic filed IPO papers on October 26, 2026.
It plans to list Class A shares on Nasdaq under the ticker ANT.
First-half 2026 revenue hit $16.3 billion, up from about $1.2 billion.
Most of the loss was a $72.4 billion paper charge, not cash spent.
Anthropic held $112.4 billion in cash on June 30.
Some investors now value it near $1.5 trillion, down from $2 trillion.
Over half of Fortune 500 firms are customers spending $100,000 or more.
The filing warns models could show self-preserving behaviors.
The seven co-founders hold 50.1% of voting power.
Goldman Sachs and Morgan Stanley lead the underwriters.
A roadshow is reported for the week of November 9.
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