OpenAI chief executive Sam Altman has denied allegations of sexual abuse made by his sister.
Ann Altman’s lawyers filed a lawsuit in the US accusing him of regularly sexually abusing her between 1997 and 2006.
In a joint statement with his mother and two brothers, Mr Altman, 39, said: “All of these claims are utterly untrue.”
The lawsuit, filed in a court in Missouri, alleges counts of sexual assault and sexual battery which began when Ms Altman was three and her brother was 12.
It alleges the abuse continued once he became an adult and while his 30-year-old sister was still a child.
Mr Altman is the co-founder of OpenAI alongside a string of other names, including Elon Musk.
He has become one of the world’s biggest tech names since the launch of OpenAI’s ChatGPT tool in 2022 and is estimated to be worth over $1bn (£810m), according to Forbes.
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His sister’s lawsuit seeks damages in excess of $75,000 (£60,700), punitive damages, and for the costs of the lawsuit. It also requests a jury trial.
The lawsuit states the alleged abuse caused Ms Altman to suffer from post-traumatic stress disorder, severe emotional distress, mental anguish, and depression.
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Mr Altman and his family said they had tried to provide financial and medical support to his sister.
“Caring for a family member who faces mental health challenges is incredibly difficult,” the family’s statement said.
Lawyers for Ms Altman have not yet responded to her brother’s statement.
