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OpenAI Becomes Public Benefit Corporation at $500 Billion Valuation as Microsoft Takes 27% Stake

The overhaul installs long-dated access rights with outside AGI verification.

Overview

  • The new structure gives Microsoft an ownership stake of about 27% valued near $135 billion.
  • OpenAI agreed to purchase $250 billion of Azure services as Microsoft’s exclusivity and first-refusal cloud rights end, allowing OpenAI to use other providers.
  • Microsoft retains IP and model access through 2032, including post‑AGI systems subject to confirmation by an independent expert panel.
  • Control resides with the nonprofit OpenAI Foundation, which holds roughly 26% equity valued around $130 billion and governs OpenAI Group PBC.
  • Delaware issued a statement of no objection and California’s attorney general said the office would not oppose the plan, and coverage reports Microsoft will keep a revenue share reported at about 20% until AGI is independently verified.