Elon Musk says he’s suing to save the company’s mission.

Over the next month or so, a who’s who of the technology industry is expected to appear in the Ronald V. Dellums U.S. Courthouse in Oakland, Calif., for a legal showdown between Elon Musk and the arti...

Some of the biggest names in tech are expected to testify about whether executives deceived Musk and betrayed OpenAI’s original nonprofit mission when it evolved to include a for-profit arm.