Nielsen, an American information, data and measurement firm, completed the acquisition of Precima, a SaaS-based provider of powerful retail and customer data applications and analytics, from Alliance Data Systems, a publicly traded provider of loyalty and marketing services. Financial terms were not disclosed. "Nielsen is a natural home for Precima to execute our shared vision of advancing collaboration and growth for the industry. We are proud to be joining the Nielsen Global Connect family to bring our innovative technology to life for Nielsen’s global clients," Brian Ross, Precima President.