Goldman Sachs Group announced last week that its co-head of global equities trades and execution services, Brian Levine, will retire this summer, according to a memo first viewed by Reuters. The bank also said that Philip Berlinski and Jeff Nedelman were being named co-chief operating officers of global equities with Michael Daffey. The three will jointly lead global equities. Berlinski had been Levine’s co-head overseeing global equities trades and execution services, and Nedelman had been the global head of prime services.