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David Sacks Calls for Anthropic IPO Pause Pending Review of Researcher's AI Safety Claims

September 10, 2026 at 21:34 EDT

Foundation Models
Funding & M&A
Policy & Regulation

David Sacks has called for Anthropic to pause its planned initial public offering until claims raised by former researcher Jacob Coxon are investigated, putting the lab’s safety posture under scrutiny as it prepares for public-market review. The call is a demand, not an announcement that Anthropic’s offering has been suspended.

SEPTEMBER 10, 2026 · ANTHROPIC

IPO pressure meets an AI safety warning

David Sacks is calling for a pause while Jacob Coxon’s safety claims are examined, just as Anthropic prepares for public-market review.

THE TIMING GAP

Four months in the job. Six months to vest.

4 months

At Anthropic

6 months

Vesting threshold

Coxon left two months before the six-month threshold he cited for equity vesting.

Series H

$65B

Private funding

Valuation backdrop

$965B

Post-money value

IPO filing

June 1

Draft S-1 submitted

THE QUESTION FOR MARKETS

Can safety scrutiny keep pace with the offering?

The filing sets no share count or price. Anthropic says the proposed IPO depends on SEC review, market conditions, and other factors.

Why scrutiny matters

Coxon’s warning came from inside frontier-model research.

He left before his Anthropic equity vested.

What remains unresolved

A resignation is a warning, not a completed investigation.

No IPO pause had been announced in the reported coverage.

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