Filed by Kinder Morgan, Inc.

Pursuant to Rule 425 under the Securities Act of 1933

and deemed filed pursuant to Rule 14a-6

of the Securities Exchange Act of 1934.

Subject Company: El Paso Corporation

Commission File No.: 001-14365

Commission File No. for Registration Statement

on Form S-4: 333-177895

El Paso Transaction Timeline El Paso E&P sale process under way — Targeting closing all or a material portion of E&P asset portfolio around time of closing of El Paso acquisition Integration plan being developed – targeting $350 million of synergies Shareholder meetings set for 3/2/2012 (KMI) and 3/6/2012 (EP) HSR review underway — Pre-merger notifications filed — 2 nd request received — Providing additional information to FTC Expect Q2 2012 closing

IMPORTANT ADDITIONAL INFORMATION WILL BE FILED WITH THE SEC

Kinder Morgan, Inc. (“KMI”) has filed with the SEC a Registration Statement on Form S-4 in connection with the proposed transaction including a definitive Information Statement/Prospectus of KMI and a definitive Proxy Statement of El Paso Corporation (“EP”). The Registration Statement was declared effective by the SEC on January 30, 2012. KMI and EP mailed the definitive Information Statement/Prospectus of KMI and definitive Proxy Statement of EP on or about January 31, 2012. INVESTORS AND SECURITY HOLDERS ARE URGED TO READ THE REGISTRATION STATEMENT AND THE DEFINITIVE INFORMATION STATEMENT/PROXY STATEMENT/PROSPECTUS AND ANY OTHER RELEVANT DOCUMENTS FILED OR TO BE FILED BY KMI OR EP BECAUSE THEY CONTAIN IMPORTANT INFORMATION. Investors and security holders are able to obtain free copies of the Registration Statement and the definitive Information Statement/Proxy Statement/Prospectus and other documents filed with the SEC by KMI and EP through the web site maintained by the SEC at www.sec.gov or by phone, e-mail or written request by contacting the investor relations department of KMI or EP at the following:

This communication shall not constitute an offer to sell or the solicitation of an offer to buy any securities, nor shall there be any sale of securities in any jurisdiction in which such offer, solicitation or sale would be unlawful prior to the registration or qualification under the securities laws of any such jurisdiction. No offering of securities shall be made except by means of a prospectus meeting the requirements of Section 10 of the Securities Act of 1933, as amended.

PARTICIPANTS IN THE SOLICITATION

KMI and EP, and their respective directors and executive officers, may be deemed to be participants in the solicitation of proxies in respect of the proposed transactions contemplated by the merger agreement. Information regarding KMI’s directors and executive officers is contained in the Information Statement/Proxy Statement/Prospectus which has been filed with the SEC. Information regarding EP’s directors and executive officers is contained in EP’s Form 10-K for the year ended December 31, 2010, and its proxy statement dated March 29, 2011, which are filed with the SEC. A more complete description is available in the Registration Statement and the Information Statement/Proxy Statement/Prospectus.

SAFE HARBOR FOR FORWARD-LOOKING STATEMENTS

Statements in this document regarding the proposed transaction between KMI and EP, the expected timetable for completing the proposed transaction, future financial and operating results, benefits and synergies of the proposed transaction, future opportunities for the combined company, the sale of EP’s exploration and production assets, the possible drop-down of assets and any other statements about KMI or EP managements’ future expectations, beliefs, goals, plans or prospects constitute forward looking statements within the meaning of the Private Securities Litigation Reform Act of 1995. Any statements that are not statements of historical fact (including statements containing the words “believes,” “plans,” “anticipates,” “expects,” estimates and similar expressions) should also be considered to be forward looking statements. There are a number of important factors that could cause actual results or events to differ materially from those indicated by such forward looking statements, including: the ability to consummate the proposed transaction; the ability to obtain the requisite regulatory, shareholder approvals and the satisfaction of other conditions to consummation of the transaction; the possibility that financing might not be available on the terms committed; the ability to consummate contemplated asset sales; the ability of KMI to successfully integrate EP’s operations and employees; the ability to realize anticipated synergies and cost savings; the potential impact of announcement of the transaction or consummation of the transaction on relationships, including with employees, suppliers, customers and competitors; the ability to achieve revenue growth; national, international, regional and local economic, competitive and regulatory conditions and developments; technological developments; capital and credit markets conditions; inflation rates; interest rates; the political and economic stability of oil producing nations; energy markets, including changes in the price of certain commodities; weather conditions; environmental conditions; business and regulatory or legal decisions; the pace of deregulation of retail natural gas and electricity and certain agricultural products; the timing and success of business development efforts; terrorism; and the other factors described in KMI’s and EP’s Annual Reports on Form 10-K for the year ended December 31, 2010, and their most recent quarterly reports filed with the SEC. KMI and EP disclaim any intention or obligation to update any forward looking statements as a result of developments occurring after the date of this document.