Ex-Instacart CEO Fidji Simo, now the unofficial number two at OpenAI, has been tapped by CEO Sam Altman to take over OpenAI’s Applications Division. The division’s other key players—COO, CFO, and chief product officer—will report directly to her. The move leaves Altman free to focus on research, safety sys- tems, and long-term strategy for the ChatGPT provider. Simo, 39, is already a veteran of Silicon Valley. A graduate of the French business school HEC Paris, she began her US career as an