David Sacks stated that the Anthropic IPO must be paused until the investigation into the whistleblower allegations is completed

David Sacks, the chair of the President's Council of Advisors on Science and Technology, stated that Anthropic's initial public offering must be paused until the allegations against the "whistleblower" are investigated.

The "whistleblower" refers to Jacob Cox, a former researcher at Anthropic. He previously conducted pre-training research at OpenAI and joined Anthropic in July 2026, but resigned in September after only about 4 months, publicly warning on X that many people inside leading AI companies genuinely believe that this technology could lead to human extinction within a decade. Both companies are irresponsibly racing towards self-improving superintelligence, essentially gambling with the lives of all humanity.

When he left, his equity had not yet vested, as companies typically require 6 months for vesting to begin, thus he forfeited potential substantial stock gains. This occurred at a time when Anthropic had secretly submitted its IPO application, with a valuation approaching one trillion dollars.