CHESTER, Pa.--(BUSINESS WIRE)--Synygy Inc., the largest and most experienced provider of sales performance management (SPM) solutions, today announced that Daiichi Sankyo, Inc. (DSI), the U.S. pharmaceutical subsidiary of Tokyo-based Daiichi Sankyo Co., Ltd., has extended their 12-year relationship with Synygy for another five years with a new agreement for SPM software, sales compensation plan management outsourcing services, and a wide range of sales consulting services.