What is the main purpose of this 8-K filing?

The main purpose of this 8-K filing is to formally announce that CME Group Inc.'s Registration Statement on Form S-4, which includes a combined joint proxy statement/prospectus, has been declared effective by the Securities and Exchange Commission (SEC).

What does a Registration Statement on Form S-4 with a joint proxy statement/prospectus typically indicate?

A Form S-4 registration statement is used for filings related to mergers, acquisitions, and other significant business combinations. The inclusion of a joint proxy statement/prospectus signifies that shareholders of one or both companies will likely be asked to vote on the proposed transaction, and the document provides them with essential details about the transaction and their voting rights.

Does this filing provide new financial results for CME Group?

No, this 8-K filing does not present new financial results or performance metrics for CME Group. Its focus is on the procedural progress of a corporate action, specifically the effectiveness of the S-4 registration statement, which is a prerequisite for further steps in a potential transaction.

Where can I find more information about the transaction mentioned in this filing?

More detailed information regarding the transaction itself would be found within the Combined Joint Proxy Statement/Prospectus, which is attached as Exhibit 99.1 to this 8-K filing.

CME 8-K SEC Disclosure

Summary

CME Group Inc. (CME) filed a Current Report (8-K) on July 6, 2007, primarily to announce that its Registration Statement on Form S-4, containing a combined joint proxy statement/prospectus, was declared effective by the SEC. This filing is a procedural step related to an ongoing transaction or corporate action, likely a merger or acquisition, as indicated by the nature of the Form S-4 and the joint proxy statement/prospectus. Investors should note that this report itself does not contain new financial performance data but rather signals progress in a significant corporate event.

Key Highlights

1CME Group Inc. filed an 8-K on July 6, 2007.
2The primary purpose of the filing was to report that a Registration Statement on Form S-4 was declared effective by the SEC.
3The Form S-4 included a combined joint proxy statement/prospectus.
4The effective date for the Registration Statement was July 6, 2007, at 2:00 p.m. Eastern Daylight Time.
5The filing also noted it was intended to satisfy simultaneous filing obligations under Rule 425 of the Securities Act.
6Exhibit 99.1 contains the Combined Joint Proxy Statement/Prospectus filed as part of the Form S-4.

CME GROUP INC. 8-K Report, Corporate Update (Jul 6, 2007)

Summary

Key Highlights

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