Exhibit 99.1

The income statement data and balance sheet data of CME Group Inc. (the company) presented in the following selected financial data in this Exhibit 99.1 is the same as the income statement data and balance sheet data presented in Item 6 of the company’s Annual Report on Form 10-K for the fiscal year ended December 31, 2011 filed with the Securities and Exchange Commission (SEC) on February 28, 2012 (the 2011 Annual Report), except that the per share data included in the following selected financial data has been modified to reflect on a retrospective basis the five-for-one split of the company’s Class A common stock effected by way of a stock dividend to the company’s Class A and Class B shareholders effective July 20, 2012, and except that the following selected financial data includes, for each of the periods shown, the weighted average number of common shares, which reflects such stock split on a retrospective basis. The following selected financial data should be read in conjunction with the other information in the company’s Current Report on Form 8-K of which this Exhibit 99.1 is a part and the information in the 2011 Annual Report, the company’s Quarterly Reports on Form 10-Q for the quarterly periods ended March 31, 2012, June 30, 2012 and September 30, 2012 and the other documents filed by the company with the SEC since February 28, 2012.

SELECTED FINANCIAL DATA