Anthropic PBC has cautioned investors against purchasing shares from several identified secondary marketplaces, labeling these sellers as unauthorized and emphasizing that such transactions will not be recognized. This warning follows an earlier alert issued in February about fraudulent share certificates related to the company, and Anthropic has now specified eight firms that are violating its transfer restrictions. According to its transfer policy, all stock transfers require board approval, meaning any unauthorized sales are invalid. This move aligns with similar warnings from other companies in the artificial intelligence sector, such as OpenAI, which also declared unauthorized market transfers as invalid.

Anthropic PBC: Anthropic PBC is an AI safety and research company based in San Francisco, focused on building reliable, interpretable, and steerable AI systems including large language models like Claude. The privately held firm prioritizes ethical AI development and has expanded into enterprise solutions such as AI agents for finance and business automation. In this development, Anthropic updated its blog post to identify specific secondary marketplaces as unauthorized sellers of its shares, declaring such transactions void due to violations of transfer restrictions.

Transfer Policy: Anthropic requires board approval for all stock transfers, rendering unauthorized secondary market sales invalid and unrecognized.
Previous Warning: The company originally issued a statement in February about fraudulent share certificates and stock scams before updating it to name specific violators.
Industry Parallel: OpenAI released a similar warning declaring unauthorized secondary market transfers as invalid.