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POLICY · October 29, 2026
Oct 28

Senator Warren asks Anthropic's Amodei to answer for the “existential” risks in its IPO filing before the shares are sold, CFO Dive and Spectrum News report

The top Democrat on the Senate Banking Committee wants answers by 3 November, including whether any autonomous AI cyberattacks have gone undisclosed.

Senator Elizabeth Warren, the ranking member of the Senate Banking Committee, has written to Anthropic chief executive Dario Amodei about the risks the company itself lists in its IPO prospectus, CFO Dive and Spectrum News reported on 28 October. CFO Dive calls it a Wednesday letter, which is 28 October, two days after Anthropic filed its prospectus publicly.

According to CFO Dive, Warren cites the filing's warning that advanced AI could pose catastrophic or existential risks to humanity, and asks whether Amodei believes Anthropic's models pose an existential threat and what the company is doing about loss of control, economic disruption, cyberattacks and bioterrorism. Spectrum News reports that the letter asks 10 multipart questions, including how Anthropic would report AI models carrying out cyberattacks on their own, and whether any such incident has gone undisclosed.

Both outlets quote her: “I am deeply troubled by the risks raised by Anthropic itself.” She argues that the risks demand greater scrutiny before the technology is tied to public capital markets. CFO Dive says she asked for answers by 3 November.

Spectrum News says Anthropic did not respond before publication. The letter's PDF on the Senate Banking Committee's site refused two attempts to open it, so its contents here come from the two outlets.

Anthropic plans to list on the Nasdaq as “ANT”. A letter from a ranking member does not by itself delay a listing, but it puts the company's own risk language on the record in Congress.

  • Reported Warren's letter, sent on Wednesday 28 October, asks Amodei for answers by 3 November, CFO Dive reports. CFO Dive
  • Reported The letter asks 10 multipart questions, including whether any autonomous AI cyberattacks have gone undisclosed, Spectrum News reports. Spectrum News

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