Microsoft Chairman and Chief Executive Officer Satya Nadella (L), speaks with OpenAI Chief Executive Officer Sam Altman, who joined by video during the Microsoft Build 2025, conference in Seattle, Washington on May 19, 2025.The announcement comes a day after OpenAI announced that it completed a recapitalization, cementing its structure as a nonprofit with a controlling stake in its for-profit business. The nonprofit, now called the OpenAI Foundation, holds an equity stake worth about $130 billion in its for ...