Bucyrus Stockholders Approve Merger with Caterpillar

Bucyrus announced today that its stockholders have approved the proposal to adopt the merger agreement providing for the acquisition of Bucyrus by Caterpillar Inc.

The affirmative vote of the holders of a majority of the outstanding shares of common stock of Bucyrus on the record date was required to approve the proposal to adopt the merger agreement. According to the final tally of shares voted, 59,822,881 shares of common stock of Bucyrus voted for the approval of the proposal to adopt the merger agreement, representing approximately 99.7 percent of the total shares voted in response to the proposal and approximately 73.8 percent of the outstanding shares of common stock of Bucyrus as of the close of business on December 22, 2010, the record date for this vote.

Bucyrus anticipates that the merger will be completed mid-2011.

Bucyrus designs and manufactures mining equipment for the surface and underground mining industries. Bucyrus’ surface mining equipment is used for mining coal, copper, iron ore, oil sands and other minerals. Bucyrus’ underground mining equipment is used primarily for mining coal and minerals such as potash and trona. In addition to machine manufacturing, Bucyrus manufactures parts and provides support services for their machines. Bucyrus’ corporate headquarters is located in South Milwaukee, Wis., USA.

Bucyrus stockholders are urged to read all relevant documents filed with the SEC, including the proxy statement, because they will contain important information about the proposed transaction.

Investors and security holders may obtain free copies of the proxy statement, as well as other filed documents, without charge, at the SEC’s website (http://www.sec.gov). Free copies of Bucyrus’s filings may be obtained by directing a request to Bucyrus’s Investor Relations by telephone to (414)768-4000, in writing to Bucyrus, Attention: Investor Relations, 1100 Milwaukee Avenue, South Milwaukee, WI 53172, by email to amalingowski@bucyrus.com or at Bucyrus’s website (http://www.bucyrus.com).