WILsquare-backed OuterBox, an Ohio-based performance marketing agency, has acquired Gro Marketing. The deal brings together two firms focused on digital marketing services, though financial terms were not disclosed. This marks a strategic expansion for OuterBox, which is backed by private equity firm WILsquare Capital.

The acquisition allows OuterBox to broaden its service offerings and client base. Performance marketing agencies have seen increased demand as businesses shift more advertising spend to digital channels. OuterBox's move follows a pattern of consolidation in the marketing services sector, where larger players seek scale through strategic buys.

Industry observers will watch how OuterBox integrates Gro Marketing's operations. The deal could signal further acquisitions for the agency as it leverages WILsquare's backing. For competitors, this consolidation underscores the competitive pressure in a fragmented market where specialized firms must grow or partner to stay relevant.