US BioEnergy Reports Financial Results for the Second Quarter Ended June 30, 2007

Business Wire, August 13, 2007

EBITDA

This news release describes "EBITDA" in addition to earnings calculated in accordance with generally accepted accounting principles (GAAP). Management believes that EBITDA is useful in evaluating the company's operating performance in relation to other companies in the industry because the calculation of EBITDA generally eliminates the effects of financings and income taxes, items that vary for different companies for reasons unrelated to overall operating performance. EBITDA is not a measure of financial performance under GAAP, and should not be considered an alternative to net income, or any other measure of performance under GAAP, or to cash flows from operating, investing or financing activities as an indicator of cash flows or as a measure of liquidity. EBITDA has its limitations as an analytical tool, and you should not consider it in isolation or as a substitute for analysis of our results as reported under GAAP. Some of the limitations of EBITDA are:

* EBITDA does not reflect cash used for capital expenditures;

* Although depreciation and amortization are non-cash charges, the assets being depreciated or amortized often will have to be replaced and EBITDA does not reflect the cash requirements for replacements;

* EBITDA does not reflect changes in, or cash requirements for, working capital requirements;

* EBITDA does not reflect the cash necessary to make payments of interest or principal on indebtedness; and

* EBITDA includes non-recurring payments which are reflected in other income.

Because of these limitations, EBITDA should not be considered as a measure of discretionary cash available to service debt or to invest in the growth of our business. Management compensates for these limitations by relying on GAAP results as well as EBITDA.

Conference Call

The company will host a conference call today at 10:00 a.m. Central Time. Investors interested in listening to the call can dial (888) 895-4463 and reference conference ID 12091213. This call will be webcast and can be accessed via US BioEnergy's Web site at www.usbioenergy.net (follow the instructions on the Investor Relations page). A replay of the webcast will be available through September 3, 2007. The telephone replay will be available approximately two hours after the call concludes by dialing (800) 642-1687 or (706) 645-9291 and reference conference ID 12091213.

About US BioEnergy Corporation

US BioEnergy Corporation is a producer and marketer of ethanol and distillers grains. The company currently owns and operates four ethanol plants and has three additional ethanol plants under construction, and intends to acquire Millennium Ethanol, LLC. Upon completion of these initiatives, the company will own and operate eight plants with combined expected nameplate ethanol production capacity of 700 million gallons per year.

Safe Harbor Statement

Certain matters discussed in this news release are "forward-looking statements." The Private Securities Litigation Reform Act of 1995 has established that these statements qualify for safe harbors from liability. Forward-looking statements may include words like "believe," "anticipate," "target," "expect," "pro forma," "estimate," "intend," "guidance" or words of similar meaning. Forward-looking statements describe future plans, objectives, expectations or goals. Although US BioEnergy Corporation believes that its expectations are based on reasonable assumptions, all forward-looking statements involve risk and uncertainty. Therefore, actual results could vary materially from what we expect. Please review our filings the Securities and Exchange Commission, including Annual Report on Form 10-K for the year ended December 31, 2006, for important risk factors that could cause results to differ materially from those in any such forward-looking statements. Any forward-looking statement speaks only as of the date such statement was made, and the company does not undertake any obligation to update any forward-looking statement to reflect events or circumstances after the date on which such statement was made except as required by applicable laws or regulations.