USG Files Registration Statement with SEC

Business Wire, March 3, 2006

CHICAGO -- USG Corporation (NYSE:USG) announced today that the company has filed a Registration Statement with the Securities and Exchange Commission for its previously announced $1.8 billion rights offering.

USG expects to raise $1.8 billion in new equity funding through a rights offering to the Company's stockholders. For each share of common stock outstanding on the record date of the rights offering (which has not yet been determined), the stockholder as of that date will receive a right to purchase one new USG common share at a price of $40.

This press release does not constitute an offer of any securities for sale in the rights offering.

This press release contains forward-looking statements related to management's expectations about future conditions. The effects of USG's Chapter 11 reorganization and the conduct, outcome and costs of the Chapter 11 cases, including the ultimate outcome and costs associated with the Corporation's agreement to resolve asbestos liabilities, may differ from management's expectations. Actual business, market or other conditions may also differ from management's expectations and accordingly affect the corporation's ability to complete the rights offering as currently expected. Actual results may differ due to various other factors, including economic conditions such as the levels of construction activity, employment levels, interest rates, currency exchange rates and consumer confidence; competitive conditions such as price and product competition; shortages in raw materials; increases in raw material and energy and employee benefit costs; loss of one or more customers; the unpredictable effects of acts of terrorism or war upon domestic and international economies and financial markets; and acts of God. USG Corporation assumes no obligation to update any forward-looking information contained in this press release.