Quad/Graphics, Inc.said it plans to acquire of independent creative agency Periscope.   The transaction has been approved by both companies’ boards of directors and is expected to close in early 2019. Under terms of the agreement, Quad/Graphics will purchase Periscope for $132.5 million.   “We are redefining the future of integrated marketing at a time of substantial disruption when clients are looking for less complexity, greater transparency and accountability from their business partners,” sa...