David Sacks, chairman of the U.S. President's Council of Advisors on Science and Technology, said Anthropic's initial public offering should be suspended until allegations raised by former researcher Jacob Coxon and other whistleblowers are investigated and clarified. Coxon, who previously conducted pretraining research at OpenAI, warned that employees at leading AI companies believe the technology could cause human extinction within a decade and that companies are irresponsibly competing to build self-improving superintelligence. Anthropic has reportedly filed confidentially for an IPO as its valuation approached $1 trillion, adding investor and governance concerns to the debate over AI safety and corporate oversight.