MIC Macquarie Infrastructure Holdings LLC

Item 1.01. Entry into a Material Definitive Agreement

On January 3, 2018, Macquarie Infrastructure Corporation (the “Company”) entered into a new senior secured revolving credit facility (the “Credit Agreement”) among the Company, as borrower, MIC Ohana Corporation (“MIC Ohana”), as guarantor, J.P. Morgan Chase Bank, N.A., as administrative agent and the lenders party thereto. The senior secured revolving credit facility provides borrowings of up to $600.0 million, and replaces a revolving credit facility of $410 million that matured in 2019 (the “Existing Credit Agreement”). The new senior secured revolving credit facility will mature four years after the closing date on January 3, 2022. Aggregate commitments under the senior secured revolving credit facility may be increased under an uncommitted incremental facility up to an additional $100 million (plus an additional $100 million subject to the facility then being unsecured (see below) or the Company being in compliance with a leverage ratio). In addition, a portion of the senior secured revolving credit facility in an aggregate amount of up to $200.0 million is available for the issuance of stand-by letters of credit, of which $150.0 million is committed to be issued. The senior secured revolving credit facility is guaranteed by MIC Ohana and secured by a pledge of the Company’s directly held equity interests, including in MIC Ohana, and all intercompany debt owed to the Company. The senior secured revolving credit facility provides that the security may fall away during any period when at least two investment grade ratings have been obtained by the Company and are in effect and certain other conditions have been met.

Interest on borrowings under the senior secured revolving credit facility will accrue at a rate per annum equal to either an Alternate Base Rate (as described in the Credit Agreement) plus an applicable margin or an Adjusted LIBO Rate (as described in the Credit Agreement) plus an applicable margin.

The Company may use borrowings under the senior secured revolving credit facility for general corporate and working capital purposes including, among others, financing acquisitions.

The senior secured revolving credit facility includes customary affirmative covenants, including an obligation by the Company to use commercially reasonable efforts to maintain a credit rating from Standard & Poor’s Financial Services LLC or Moody’s Investors Service, Inc. (but not obtain or maintain a specific rating). In addition, the senior secured revolving credit facility includes customary negative covenants, including limitations on incurrence of indebtedness of MIC Ohana; creating or incurring liens; merging or consolidating with other entities; selling or disposing of certain assets; making restricted payments; transacting with affiliates; entering into restrictive agreements; and granting certain security interests in the equity interests of subsidiaries, in each case, subject to specified exceptions. The senior secured revolving credit facility also contains a financial covenant based on a ratio of cash flow available for debt service to net cash interest expense.

The senior secured revolving credit facility contains customary events of default including, but not limited to, the Company’s failure to pay principal or interest when due, a change of control, covenant defaults, cross-defaults to certain other indebtedness, monetary judgment defaults and events of bankruptcy.

The press release announcing the entrance into the Credit Agreement is filed as Exhibit 99.1 to this Current Report on Form 8-K and is herein incorporated by reference.

In the ordinary course of business, certain lenders under the senior secured revolving credit facility and their related entities have provided, and may in the future provide, investment banking and commercial banking or other financial services to the Company for which they have received, and may in the future receive, customary compensation and expense reimbursement. Macquarie Capital Funding LLC, a lender under the senior secured revolving credit facility, is an affiliate of our manager, Macquarie Infrastructure Management (USA) Inc.