"A deal announced [Sept. 25] to transition Mercer's defined contribution (DC) plan administration business to Transamerica's retirement platform will drive the migration of more than 900,000 participants and adds further momentum to a streak of recordkeeper consolidations.... [Sandy McCarthy, Mercer U.S. benefits administration leader, said:] 'We see both sides of the agreement playing out quite nicely. We will continue to invest in our defined benefit [DB] administration and in our health benefit administration business, while Transamerica will continue its own fantastic investment on the DC admin side.' "