Anthropic Declares Unauthorized Stock Trades 'Null and Void,' Shaking the Unlisted AI Market

Anthropic said any share sales or transfers made without board approval are void, rattling the private AI stock market.

The move challenges OTC platforms and indirect structures such as SPVs and tokenized securities used to access late-stage startup shares.

The decision could unsettle pricing and trading practices for major private AI companies by weakening the legal standing of secondary transactions.

Market participants are now watching whether the policy triggers broader legal and liquidity fallout across the private-tech ecosystem.