Complex sentence: In June 2014 the company was taken public again, in a management buy-in (MBI), for £1.18bn, when he became the company's chairman on 26 June 2014; at the time the AA had around £3bn in debt.
Split into simpler sentences: In June 2014 the AA was taken public, in a management buy-in, for £1.18bn. At the time the AA had around £3bn in debt.