Sam Altman's Sister Updates Abuse Lawsuit Against OpenAI CEO

Annie Altman, the sister of Sam Altman, filed a revised lawsuit on Tuesday, April 1, 2026, in federal court in St. Louis, United States, accusing the CEO of OpenAI of sexual abuse and rape that allegedly took place between 1997 and 2006.

According to court documents, the alleged abuse began when she was 3 years old and he was 12, in their family home in Clayton, Missouri. Sam Altman, now 40, denies all accusations and has filed a countersuit for defamation based on her public statements between 2021 and 2024.

The case gained new momentum on March 20, when Judge Zachary Bluestone dismissed the original complaints due to the statute of limitations but allowed the updated version to proceed under the state’s child sexual abuse law. This law enables victims to sue even decades later. Annie Altman took advantage of this provision and submitted the revised petition within the deadline.

Sam Altman's family disputes the allegations, expressing concerns about her mental health and describing the lawsuit as an attempt at extortion. He, in turn, keeps the countersuit active. According to Reuters, the executive’s lawyers did not immediately comment on the new filing.

The incident comes at a sensitive time for OpenAI, a leader in the generative AI market with ChatGPT, attracting billions in investments. Concerns about the CEO’s leadership had already arisen before, such as his temporary dismissal by the board in 2023. Now, with the legal case progressing, attention is once again on the governance and ethics behind the company shaping the future of AI.

Sam Altman's defamation countersuit is also proceeding in the same federal court in St. Louis.