In what the company acknowledges is a small branding change, professional services and insurance firm Marsh & McLennan has dropped the ampersand to become Marsh McLennan, the Insurance Journal reported. The change is meant to emphasize that Marsh McLennan is a combination of four businesses working together to serve clients, the company said. “Our modernized name and logo, an abstract infinity symbol, embody and emphasize our heritage,” the company stated in announcing the new branding. “Taken together, these changes also convey how our businesses — Marsh, Guy Carpenter, Mercer and Oliver Wyman — are working in unison to take on the world’s greatest challenges.” Mercer and Marsh both have significant operations in Greater Des Moines.