Hornbeck Offshore Prepares to Refresh Shelf Registration Statements

Hornbeck Offshore Services, Inc. announced today that it has filed an acquisition shelf registration statement on Form S-4 with the Securities and Exchange Commission (“SEC”) and plans to file a universal shelf registration statement on Form S-3 in the near future. These filings will replace the Company’s existing shelf registration statements on Forms S-4 and S-3 that have been effective since September 2005. Under SEC rules, shelf registration statements of SEC registrants that became effective before December 1, 2005 will expire on December 1, 2008.

Once effective with the SEC, the acquisition shelf registration statement on Form S-4 will enable the Company to issue up to $500 million of its common stock, preferred stock, debt securities or warrants to purchase common stock, preferred stock or debt securities, or any combination of such securities, from time to time, in connection with acquisition transactions. These transactions may include the acquisition of assets, businesses or securities, whether by purchase, merger or any other form of business combination. The registration statement, when effective, will continue to afford the Company significant flexibility in structuring future acquisition opportunities as they may arise.

Once effective with the SEC, the universal shelf on Form S-3 will enable the Company to sell from time to time, in one or more public offerings, up to $250 million of its common stock, preferred stock, debt securities or warrants to purchase common stock, preferred stock or debt securities, or any combination of such securities.

The registration statements relating to these securities have been or will be filed with the SEC, but have not yet become effective. These securities may not be sold, nor may offers to buy be accepted, prior to the time the applicable registration statement becomes effective. This press release shall not constitute an offer to sell or the solicitation of an offer to buy, nor shall there be any sale of these securities in any state in which such offer, solicitation or sale would be unlawful prior to registration or qualification under the securities law of any such state. Any offer of these securities will be made solely by means of the prospectuses included in the registration statements and any prospectus supplements that may be issued with respect to such offerings.

Hornbeck Offshore Services, Inc. is a leading provider of technologically advanced, new generation offshore supply vessels primarily in the U.S. Gulf of Mexico and other select U.S. and international markets, and is a leading short-haul transporter of petroleum products through its coastwise fleet of ocean-going tugs and tank barges primarily in the northeastern U.S., the U.S. Gulf of Mexico, the Great Lakes and in Puerto Rico. Hornbeck Offshore currently owns a fleet of over 80 vessels primarily serving the energy industry.