OpenAI COO Brad Lightcap Steps Back as AGI CEO Fidji Simo Takes Medical Leave

OpenAI COO Brad Lightcap is transitioning out of his chief operating officer role into a special projects position reporting to CEO Sam Altman, while Fidji Simo, who leads OpenAI's AGI business unit, is taking medical leave, Bloomberg reported Thursday in a disclosure that reveals significant leadership turbulence at the AI company. Lightcap has been one of OpenAI's most senior executives, overseeing business operations and revenue as the company scaled from a research lab into a commercial enterprise with an annualized revenue run rate exceeding $4 billion. His move to a special projects role represents a meaningful change in OpenAI's operating structure at a time when the company is navigating its transition to a for-profit entity and a reported $40 billion funding round. Fidji Simo, the former Instacart CEO who joined OpenAI in 2024 to lead its consumer and enterprise business division, is stepping away on medical leave. Simo brought significant technology company operating experience to a company that critics have noted can struggle with organizational scale and business discipline. The simultaneous departure of two senior operators creates a leadership gap at a pivotal moment. OpenAI is managing its corporate restructuring, the build-out of its Stargate data center initiative, competitive pressure from Google and Anthropic, and the integration of multiple recent acquisitions including TBPN. OpenAI did not provide details on timing for either executive's transition or return. The company has experienced notable leadership turnover since its high-profile board crisis in late 2023, including the departure of co-founder Ilya Sutskever and several other senior researchers.