This paper explores the results of and lessons learned from a pilot initiative, in which members of CDP’s Supply Chain program use their leverage as global purchasers to encourage greater uptake of efficiency amongst their key suppliers and help them overcome common barriers to investing in emissions reduction projects. The initiative helps embed energy efficiency into suppliers’ decision-making processes, and gives suppliers access to technical assistance and a proven portfolio of resources, as well as encourages implementation of profitable energy efficiency measures and recognize supplier achievements.