Elon Musk’s rocket maker became one of the country’s most valuable private companies due in part to its ability to develop risky space businesses outside the scrutiny of public investors. Its executives liked to say the company wouldn’t IPO until its rockets were regularly flying to Mars.

Elon Musk has asked his followers on social media site X whether he should buy Ryanair, in the escalation of a dispute that began when Michael O’Leary ruled out adding Starlink internet to the airline...

The budget airline burned Musk on Tuesday by announcing they were launching a “Great Idiots seat sale especially for Elon and any other idiots on X.”