Hogan Lovells co–CEOs J. Warren Gorrell Jr. and David Harris will vacate their posts when their current terms expire next summer, and the firm’s partners are in the process of voting to approve their proposed successor, global litigation cohead Stephen Immelt, the firm announced Wednesday.

Gorrell and Harris, both of whom are 59, have shared the CEO title since their respective legacy firms, Hogan & Hartson and Lovells, combined in a 2010 tie-up that the two men took the lead in negotiating. Their four-year terms are set to end next summer, and—pending the results of a firmwide partnership vote—Immelt is likely to step into the newly created sole CEO role as of July 1.