OpenAI — Legal Structure: Public Benefit Corporation

NoteThe source directly confirms all key elements of the claim: (1) Legal structure is Public Benefit Corporation (PBC) — explicitly stated: 'its for-profit arm is now a public benefit corporation called OpenAI Group PBC'; (2) Restructuring completed October 28, 2025 — article dated Tuesday, October 28, 2025 with headline 'OpenAI completes restructure'; (3) Nonprofit OpenAI Foundation holds 26% equity stake ($130B) — source states 'The nonprofit holds an equity stake currently worth about $130 billion' and 'the OpenAI Foundation will hold a 26% stake'; (4) Retains legal control — source confirms 'nonprofit with a controlling equity stake'; (5) $500B valuation — source states 'currently valued at $500 billion'; (6) Microsoft holds 27% ($135B) — source confirms 'now holds an investment in the PBC that is valued at $135 billion, or roughly 27%'. All numerical values match or are within rounding tolerance.