The First Trust Energy Infrastructure Fund operates as a closed-end equity mutual fund, managed principally by First Trust Advisors L.P., with co-management responsibilities held by Energy Income Partners LLC. Its investment strategy focuses on publicly traded companies within the United States. Specifically, the fund aims to allocate capital to businesses integral to the energy infrastructure sector. This includes traditional entities such as pipeline operators and utility companies, as well as other firms that generate at least half of their revenue from either operating or providing services to support essential infrastructure assets. These assets comprise pipelines, power transmission networks, and facilities for storing petroleum and natural gas across the petroleum, natural gas, and power generation industries. A significant portion of its holdings consists of publicly traded Master Limited Partnerships (MLPs) and their affiliated entities. To evaluate its performance, the fund utilizes three primary benchmarks: the Philadelphia Stock Exchange Utility Index, the Alerian MLP Total Return Index, and a blended index composed equally (50/50) of these two. This U.S.-domiciled fund was established on February 22, 2011.