Use of Non-GAAP Measures

Ultrapetrol believes that the disclosed non-Generally Accepted Accounting Principles ("GAAP") measures such as adjusted EBITDA, adjusted net income and any other adjustments thereto, when presented in conjunction with comparable GAAP measures, are useful for investors to use in evaluating the liquidity of the company. These non-GAAP measures should not be considered a substitute for, or superior to, measures of liquidity prepared in accordance with GAAP. A reconciliation of adjusted EBITDA to segment operating profit and cash flow from operations is presented in the tables that accompany this press release.

Investment Community Conference Call

Ultrapetrol will host a conference call for investors and analysts on Thursday, May 9, 2013, at 8:30 a.m. EDT accessible via telephone and Internet with an accompanying slide presentation. Investors and analysts may participate in the live conference call by dialing 1-888-989-5165 (toll-free U.S.) or +1-312-470-7393 (outside of the U.S.); passcode: ULTR. Please register at least 10 minutes before the conference call begins. A replay of the call will be available for one week via telephone starting approximately one hour after the call ends. The replay can be accessed at 1-800-964-5760 (toll-free U.S.) or +1-203-369-3112 (outside of the U.S.); passcode: 5111. The webcast will be archived on Ultrapetrol's Web site for 30 days after the call.

About Ultrapetrol

Ultrapetrol is an industrial transportation company serving the marine transportation needs of its clients in the markets on which it focuses. It serves the shipping markets for containers, grain and soya bean products, forest products, minerals, crude oil, petroleum, and refined petroleum products, as well as the offshore oil platform supply market with its extensive and diverse fleet of vessels. These include river barges and pushboats, platform supply vessels, tankers and two container feeder vessels. More information on Ultrapetrol can be found at www.ultrapetrol.net .

Forward-Looking Language

The forward-looking statements in this press release are based upon various assumptions, many of which are based, in turn, upon further assumptions, including without limitation, our management's examination of historical operating trends, data contained in our records and other data available from third parties. Although we believe that these assumptions were reasonable when made, because these assumptions are inherently subject to significant uncertainties and contingencies which are difficult or impossible to predict and are beyond our control, we cannot assure you that we will achieve or accomplish these expectations, beliefs or projections.

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