Hannon Armstrong Sustainable Infrastructure Capital, Inc. is making waves in the sustainable infrastructure space with its provision of both capital and services to the renewable energy, energy efficiency, and other sustainable infrastructure markets throughout the United States. The company's projects include facilities and buildings that utilize solar generation, energy storage, and energy efficiency improvements such as HVAC systems, lighting, energy controls, roofs, windows, building shells, and/or combined heat and power systems. Furthermore, Hannon Armstrong focuses on grid-connected projects that implement cleaner energy sources such as wind and solar to generate power. The company has also delved into sustainable infrastructure projects like upgraded transmission and distribution systems, water and stormwater infrastructures, transportation fleet enhancements, and even renewable natural gas plants. Hannon Armstrong qualifies as a real estate investment trust for U.S. federal income tax purposes, which generally exempts it from federal corporate income taxes if it distributes at least 90% of its taxable income to its stockholders. Founded in 1981 and headquartered in Annapolis, Maryland, this company has quickly established itself as a leader in the sustainable infrastructure industry.