Anthropic, the developer of Claude, is planning one of the biggest IPOs in history under the public benefit corporation (PBC) structure. Delaware introduced PBCs in 2013 to require companies to pursue profits while balancing investor interests with effects on stakeholders and a stated public mission. Anthropic’s amended certificate of incorporation, dated May 7, 2026, says its public benefit is to responsibly develop and maintain advanced AI for humanity’s long-term benefit. OpenAI Group PBC, the developer of ChatGPT, has also adopted the structure. PBCs must establish standards for their missions and report on progress at least every two years, but they do not face mandatory independent mission audits. Shareholders can sue directors over failures to pursue the public benefit, subject to ownership thresholds, while limited case law leaves some legal uncertainty.