The Pritzker Group-backed Carter Waters has acquired A.R.T. Concrete and Tool Supply, expanding its operations in the St. Louis region. A.R.T is a provider of building materials, concrete stamps, driveway sealers and caulks. The Pritzker Group acquired Carter Waters in 2007. Carter Waters distributes construction materials and tools to commercial, highway, municipal and multi-family builders in Missouri, Kansas and Southern Illinois.