Eduardo Repetto, co-CEO and co-CIO of Dimensional Fund Advisors, will leave DFA in September, the company said Tuesday.
Gerald O'Reilly, currently co-CIO, will become co-CEO with David Butler. David Booth, the company's founder, will continue in his role as executive chairman.
Mr. Repetto, a 17-year veteran of DFA, was joined as co-CEO in February by Mr. Butler. He has been a company director since 2009.
"Eduardo has made tremendous contributions to Dimensional's success and our investment process," Mr. Booth said in a statement. "At Dimensional, our investment process is robust and led by a committee, benefiting from the contributions of a broad team. Our integrated process combines great research with careful execution by our portfolio management and trading teams."
Mr. O'Reilly will be added to the parent company's board of directors. He joined DFA in 2004.
"Gerard has played an instrumental role in evolving and broadening our capabilities as the science has advanced and our clients' needs have progressed," Mr. Butler said. "It is a pleasure to work with him and see the impact he's had. Working together in this expanded capacity will help us continue to push our business and solutions forward for clients."