OpenAI is losing its second-in-command at arguably the worst possible moment. Fidji Simo, the company’s president overseeing product and business operations, announced a medical leave of absence in early April 2026 due to a neuroimmune condition, stepping away from daily operations just as the company barrels toward what could be the most consequential tech IPO in years.
OpenAI confidentially filed IPO paperwork with the SEC around June 8, 2026, and the company is now navigating the messy reality of going public without the executive who was effectively running the business side of the operation.
A leadership deck that keeps getting reshuffled
Simo’s departure didn’t happen in isolation. Around the same time in April 2026, longtime COO Brad Lightcap transitioned out of his operational role and into a special projects position focused on complex deals and investments, reporting directly to CEO Sam Altman.
CMO Kate Rouch also exited around April 2026, adding yet another name to a growing list of senior departures.
