Macquarie Infrastructure Company (NYSE: MIC) announced that it has filed an automatic shelf registration statement on Form S-3 ("shelf") with the Securities and Exchange Commission.

Along with the shelf registration statement the Company has filed a prospectus supplement with respect to a previously announced dividend reinvestment/direct stock purchase program named MIC Direct. The prospectus supplement relates to the issuance of up to 1 million additional shares of MIC to participants in MIC Direct. The Company may also choose to fill requests for reinvestment of dividends or share purchases through MIC Direct via the open market.

Investors interested in participating in MIC Direct may contact the plan administrator, Computershare Trust Company, N.A. ("Computershare"), at 866-867-6422 or on-line at www.computershare.com/investor for a copy of the prospectus and the prospectus supplement as well as application forms.

The filing of the shelf registration of Form S-3 allows the Company to issue and sell an indeterminate amount of its LLC interests and debt securities in one or more future offerings. The specific terms of any future offering will be established by the Company at the time of the offering, subject to market conditions, and will be described in a prospectus supplement filed at the time of such offering.

This press release shall not constitute an offer to sell or the solicitation of an offer to buy any securities. Any offer of securities will be made solely by means of the prospectus included in the registration statement and any applicable prospectus supplement that may be issued with respect to any offering.

MIC also announced that it intends to release its financial results for the first quarter of 2013 after the close of market trading on Monday, April 29, 2013. The Company has scheduled a conference call and webcast for analysts and investors at 8:00 a.m. Eastern Time on Tuesday, April 30, 2013 during which management will discuss the quarterly results.

To access the MIC conference call dial +1(650) 521-5252 at least 10 minutes prior to the scheduled start time. Listeners may access the webcast of the conference call on the company's website at www.macquarie.com/mic.

A replay of the webcast will be available after 2:00 p.m. on April 30, 2013 through midnight May 7, 2013 at +1(404) 537-3406, Passcode: 34468730. An archive of the webcast will be available on the MIC website for one year following the call.

The Annual General Meeting of the shareholders of MIC will be conducted on May 20, 2013 at 5:30 PM Eastern Daylight Time. Note that the date and time of the meeting have been updated from those published by MIC in its annual report on Form 10-K.

As it has in past years, the Company will conduct its Annual Meeting virtually. Shareholders are encouraged to attend the meeting digitally by logging on to www.virtualshareholdermeeting.com/MIC13 and entering their Control Number.

About Macquarie Infrastructure Company

Macquarie Infrastructure Company owns, operates and invests in a diversified group of infrastructure businesses providing basic services to customers in the United States. Its businesses consist of a gas processing and distribution business, Hawaii Gas, a controlling interest in a District Energy business in Chicago, and a 50% interest in a bulk liquid storage terminal business, International-Matex Tank Terminals. MIC also owns and operates an airport services business, Atlantic Aviation and two solar power generation facilities, collectively MIC Solar. The Company is managed by a wholly-owned subsidiary of the Macquarie Group. For additional information, please visit the Macquarie Infrastructure Company website at www.macquarie.com/mic. MIC-G

MIC is not an authorized deposit-taking institution for the purposes of the Banking Act 1959 (Commonwealth of Australia). The obligations of MIC do not represent deposits or other liabilities of Macquarie Bank Limited ABN 46 008 583 542 (MBL). MBL does not guarantee or otherwise provide assurance in respect of the obligations of MIC.

Macquarie Infrastructure Company
Investor enquiries:
Jay A. Davis, 212-231-1825
Investor Relations
or
Media enquiries:
Paula Chirhart, 212-231-1310
Corporate Communications