Barry Diller is back in control at IAC—or, more precisely, he never went away. Joey Levin, chief executive of the conglomerate, is stepping down to become executive chairman of Angi, the home ...

Diller, whose previous stint as CEO ended in 2010, had already been serving as chairman of IAC. The company’s largest holding is Dotdash Meredith, publisher of People, Southern Living and other ...