Hain, 51, resigned after completing the integration of Invesco and Perpetual fund brands in Britain the past few years, according to a Reuters report. He has worked for the Amvescap group of companies since 1998.
The companys chief investment officer, Robert Yerbury, will replace Hain as chief executive, the company said.
Amvescap has phased out the Invesco brand name for its Denver-based mutual fund group for U.S. retail investors but the moniker will be kept for British clients.
Invesco and sister company AIM Investments agreed to pay $375 million to settle civil fraud charges that it allowed preferred clients to trade in and out of its funds in exchange for sticky assets, a practice discouraged in its prospectus.
Former Invesco President and CEO Ray Cunningham also settled with the SEC, agreeing to pay $1 in disgorgement and $500,000 in civil penalties.