Kate Conger and Ryan Mac

The focus of the inquiry was unclear, but several former executives said they had racked up more than $1 million in expenses dealing with it...

Elon Musk’s company made the norm-shattering move two days after the publishing start-up Substack unveiled a Twitter-like service.

The promised changes to the platform’s verification program have been slow. Attention has focused instead on the image of a doge in place of the...

The billionaire bought the social media company for $44 billion in October and took it private.

Fury mounted over Mr. Musk’s moves to prevent Twitter users from sharing links to other social media platforms. The billionaire also asked whether he should...

In his first communications with Twitter’s staff, the company’s new owner painted a bleak picture as more employees resigned.