ClearBridge Energy MLP Opportunity Fund Inc. (the Fund) is a non-diversified, closed-end management investment company. The Fund’s investment objective is to provide a high level of total return with an emphasis on cash distributions. The Fund seeks to achieve its objective by investing primarily in master limited partnerships (MLPs) in the energy sector. The Fund will invest at least 80% of its managed assets in MLPs in the energy sector (the 80% policy). The Fund considers an entity to be within the energy sector if it derives at least 50% of its revenues from the business of exploring, developing, producing, gathering, transporting, processing, storing, refining, distributing, mining or marketing natural gas, natural gas liquids (including propane), crude oil, refined petroleum products or coal. Legg Mason Partners Fund Advisor, LLC (LMPFA) is the Fund’s investment manager. The Fund's sub advisor is ClearBridge.