Aspen Insurance Holdings has a new management team after its acquisition by Apollo Global Management.

The $US2.6 billion ($3.6 billion) takeover, announced last August, was sealed this month after approval from regulators and Aspen shareholders.

Aspen shares ceased trading on the New York Stock Exchange and Bermuda Stock Exchange on February 15.

Former Brit Insurance executive chairman Mark Cloutier has been appointed Aspen Executive Chairman and CEO with immediate effect.

“We are excited for our funds to be acquiring Aspen as it embarks on the next chapter of its development,” Apollo partner Alex Humphreys said.

“[Mr Cloutier] has a long and successful track record in the insurance sector and we believe he is ideally placed to lead Aspen through a period of transition to substantially improved profitability.”

Apollo narrowed its loss last year to $US145.8 million ($203.4 million) from $US266.4 million ($371.7 million) in 2017.