X0306 4 2016-11-10 0 0001561894 Hannon Armstrong Sustainable Infrastructure Capital, Inc. HASI 0001574208 Cirilli Mark 20 MARSHALL STREET, SUITE 300 NORWALK CT 06854 1 0 0 0 Common stock, par value $0.01 per share 2016-11-10 4 P 0 5000 19.33 A 55565 D The shares of Common Stock are held jointly by the reporting person and his spouse. The price reported in Column 4 is a weighted average price. These shares were purchased in multiple transactions at prices ranging from $19.30 to $19.40, inclusive on November 10, 2016. The reporting person undertakes to provide Hannon Armstrong Sustainable Infrastructure Capital, Inc. (the "Company"), any security holder of the Company, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares purchased at each separate price within the ranges set forth in this footnote. /s/ Mark Cirilli 2016-11-14