Kroll is an American multinational financial and risk advisory firm that has its headquarters in New York City. It was established in 1932 as Duff & Phelps. In 2018, Duff & Phelps acquired the original Kroll company, which had been founded in 1972. In 2021, Duff & Phelps decided to rebrand itself as Kroll, a process it completed in 2022.