X0306 4 2018-06-06 0 0001289790 Macquarie Infrastructure Corp MIC 0001311388 Macquarie Infrastructure Management (USA) INC 125 W. 55TH STREET NEW YORK NY 10019 1 0 0 0 Common Stock, par value $0.001 per share 2018-06-06 4 P 0 35000 39.69 A 8293889 D These purchases were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on May 9, 2018. The prices reported in Column 4 are a weighted average price per day. These shares were purchased in multiple transactions at prices ranging from $39.41 to $39.96, inclusive, on June 6, 2018. The reporting person undertakes to provide to Macquarie Infrastructure Corporation, any security holder of Macquarie Infrastructure Corporation, 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 (2) to this Form 4. /s/ Simone Kovacic, Authorized Signatory /s/ Diana Delgado, Authorized Signatory 2018-06-06