Barry Diller is reinventing himself once more. More than a decade after the founder of the Fox broadcast network began investing in the e-commerce and online media companies that became IAC, this week he split his sprawling empire to start again.

“The work is done and our focus now is moving forward,” Mr Diller said in a statement issued from his Frank Gehry-designed headquarters as he marked Thursday’s completion of the five-way break-up.