Fidji Simo stepped down from her full-time role as OpenAI's president of applications on Thursday, transitioning to a part-time advisory position to prioritize her recovery from a chronic illness. Simo, who took medical leave three months ago, stated that her recovery has taken longer than anticipated. In a post on X, she explained that she is only making this decision now because she "failed to make it many times before." The move marks a significant shift in leadership at the artificial intelligence company, where Simo reported directly to CEO Sam Altman.

Simo disclosed that she experienced a "severe exacerbation" of a chronic illness she has lived with for seven years. She reflected on her history of prioritizing work over health, recalling a time when she declined a full year of medical leave offered by Meta. During that period, Meta CEO Mark Zuckerberg had advised her to "play the long game." Simo's recent medical leave in April prompted a leadership shuffle at OpenAI, with Greg Brockman overseeing product and Brad Lightcap transitioning to special projects.

Leadership Transition and Support

Simo's departure from the full-time role follows a series of senior executive exits at OpenAI this year. Despite the reduction in her responsibilities, Simo remains committed to the company's mission. She thanked Altman, President Brockman, and the board for their support during her medical leave. Simo also indicated that she will continue to work toward disease cures through her involvement with OpenAI, Chronicle BioAI, and CODA Research.

Rishi N. Reddy, a colleague and co-founder, publicly responded to Simo's announcement, praising her decision to prioritize her health. Reddy described Simo as "an n of 1" and emphasized that knowing when to step back can be more difficult than continuing to push forward. He expressed confidence that she would emerge stronger and continue to make an impact.

Background at OpenAI

OpenAI appointed Simo to the newly created role of chief of applications in May 2025. At the time of her appointment, she was the CEO of Instacart. Her transition to a part-time advisor role concludes her tenure as a key executive driving OpenAI's application strategy. The company has yet to announce a permanent replacement for her full-time responsibilities.

Current and former employees of OpenAI and Anthropic could hypothetically purchase nearly one-third (29%) of all homes in the San Francisco metro area with their post-IPO equity, according to a new report by Redfin. This analysis highlights the massive scale of wealth creation within the artificial intelligence sector as major firms prepare for public listings. The potential buying power extends beyond San Francisco, with significant impacts projected for San Jose and Oakland housing markets. The findings illustrate the broader economic consequences of the AI boom on regional real estate, even as home prices in San Francisco are already growing at their fastest pace in nearly a decade.

OpenAI Employee Wealth

Redfin estimates that current and former OpenAI employees hold roughly $135 billion in equity post-taxes. This wealth could hypothetically buy an estimated 20% of all homes in the San Francisco metro area. Alternatively, the same funds could purchase 15% of all homes in the San Jose metro or 15% of all homes in the Oakland metro. OpenAI is reportedly targeting a valuation around $1 trillion. The company has granted roughly $80 billion in vested equity to employees and set aside an additional $50 billion employee stock grant pool. This means employee equity accounts for approximately 26% of the company, or roughly $260 billion at a $1 trillion valuation.

Anthropic Employee Wealth

Anthropic employees could purchase an estimated 9% of all homes in San Francisco with their upcoming IPO wealth. They could also buy roughly 7% of all homes in San Jose or 7% of Oakland’s real estate. Redfin estimates current and former employee equity in Anthropic is $63 billion post-tax. Anthropic is reportedly targeting a public listing at a valuation between $965 billion and $1 trillion. The company's employee equity stake is not publicly disclosed, so Redfin estimates it at 10%–15% of total shares, consistent with comparable late-stage tech IPOs. This implies a midpoint of roughly $120 billion in employee equity, or $63 billion post-taxes.

Bay Area Housing Market Impact

The total value of all homes in San Francisco was $692 billion as of 2024. The total value of all homes in San Jose was $872 billion, and all the homes in Oakland were worth $894 billion. While the calculations in Redfin’s report are purely hypothetical and not a realistic representation of where IPO proceeds will go, they illustrate the huge scale of wealth being created in the Bay Area. So far, AI’s impact on the local market is driven mostly by huge salaries and signing bonuses. However, when the companies go public, current and former employees—and investors—will earn much more money.

Broader AI Sector Wealth

The wealth generation extends beyond OpenAI and Anthropic. A separate Redfin report indicates SpaceX employees could hypothetically pool their IPO windfall to buy roughly 40% of all the homes in San Antonio. The total value of all homes in San Antonio was roughly $297 billion in 2024. Redfin estimates SpaceX employees hold roughly $200 billion in equity at the midpoint of a 10–15% ownership estimate, which comes to $120 billion post-taxes. These developments underscore the intensifying race among financial institutions to back leading AI developers as they transition to public markets.