According to a report in the Financial Times, lawyers for Musk have contacted attorneys-general in Delaware and California to demand that a large stake in OpenAI be sold off in an open auction process.

In his letter, Musk’s lawyer pushed the attorneys general to allow outside investors to bid for the nonprofit’s stake in OpenAI. If successful, that could allow an outside investor to take a significant position in, and to exercise control over, the start-up.

U.S. antitrust enforcers weighed in on Friday on Elon Musk's lawsuit seeking to block OpenAI's conversion to a public company, pointing out legal doctrines that support his claim that OpenAI and Microsoft engaged in anticompetitive practices.