UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

WASHINGTON, DC 20549

FORM 8-K

CURRENT REPORT

Pursuant to Section 13 or 15(d) of the

Securities Exchange Act of 1934

Date of Report (Date of earliest event reported): November 5, 2010

Mirant Corporation

(Exact Name of Registrant as Specified in Charter)


Delaware	001-16107	20-3538156
(State or Other Jurisdiction of Incorporation)	(Commission File Number)	(IRS Employer Identification No.)

1155 Perimeter Center West, Suite 100, Atlanta, Georgia		30338
(Address of Principal Executive Offices)		(Zip Code)

Registrant’s telephone number, including area code: (678) 579-5000

N/A

(Former Name or Former Address, if Changed Since Last Report)

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions (see General Instruction A.2. below):

x	Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425)

¨	Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12)

¨	Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b))

¨	Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))

Section 2 – Financial Information

Item 2.02

Results of Operations and Financial Condition.

On November 5, 2010, Mirant Corporation (the “Company,” “Mirant,” “we,” “us,” or “our”) issued a press release announcing its financial results for the quarter ended September 30, 2010. A copy of Mirant’s November 5, 2010, press release is furnished hereto as Exhibit 99.1 and incorporated by reference herein. The press release contains certain forward-looking statements, all of which are subject to the cautionary statement about forward-looking statements set forth therein. Except as otherwise provided in the press release, the press release speaks only as of the date of such press release and it shall not create any implication that the affairs of Mirant will have continued unchanged since such date.

We use certain non-GAAP financial measures in the press release and on our earnings conference calls. These non-GAAP financial measures include adjusted net income, adjusted EBITDA, realized and unrealized gross margins, adjusted gross margin, adjusted operations and maintenance expenses, adjusted net cash provided by operating activities, adjusted free cash flow and adjusted free cash flow (without MD HAA and Marsh Landing). The definitions of these non-GAAP financial measures, together with a discussion of the usefulness and purpose of such measures, is provided in the explanations attached hereto as Exhibit 99.2. Reconciliations of each of these non-GAAP measures to the most directly comparable GAAP measure can be found either in our earnings press release or in the investor presentation that we intend to utilize on our earnings conference call, which will be posted on our website prior to the commencement of the conference call.

The information contained in Item 2.02 in this Current Report on Form 8-K is to be considered “furnished” pursuant to Item 2.02 of Form 8-K and shall not be deemed “filed” for purposes of Section 18 of the Securities Exchange Act of 1934, as amended, or otherwise subject to the liabilities of that Section or Sections 11 and 12(a)(2) of the Securities Act of 1933, as amended, nor shall it be deemed incorporated by reference in any Mirant filing or report with the Securities and Exchange Commission, whether made before or after the date hereof, except as shall be expressly set forth by specific reference in such a filing or report.

Section 9 – Financial Statements and Exhibits

Item 9.01

Financial Statements and Exhibits.

(d) Exhibits.


Exhibit Number		Document

99.1		Press Release dated November 5, 2010.

99.2		Explanation of Non-GAAP Financial Measures.

Additional Information and Where To Find It

In connection with the proposed merger between RRI Energy and Mirant, RRI Energy filed with the SEC a registration statement on Form S-4 that includes a joint proxy statement of RRI Energy and Mirant and that also constitutes a prospectus of RRI Energy. The registration statement was declared effective by the SEC on September 13, 2010. RRI Energy and Mirant urge investors and shareholders to read the registration statement, and any other relevant documents filed with the SEC, including the joint proxy statement/prospectus that is a part of the registration statement, because they contain important information. You may obtain copies of all documents filed with the SEC regarding this transaction, free of charge, at the SEC’s website (www.sec.gov). You may also obtain these documents, free of charge, from RRI Energy’s website (www.rrienergy.com) under the tab “Investor Relations” and then under the heading “Company Filings,” and from Mirant’s website (www.mirant.com) under the tab “Investor Relations” and then under the heading “SEC Filings.”

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized.

Date: November 5, 2010

Mirant Corporation

/s/ Angela M. Nagy

Angela M. Nagy

Vice President and Controller

(Principal Accounting Officer)

MIRANT CORP 8-K