SEC Form 4
FORM 4 UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934
or Section 30(h) of the Investment Company Act of 1940
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Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).
1. Name and Address of Reporting Person*
Houston Julia A

(Last) (First) (Middle)
1155 PERIMETER CENTER WEST

(Street)
ATLANTA GA 30338

(City) (State) (Zip)
2. Issuer Name and Ticker or Trading Symbol
MIRANT CORP [ MIR ]
5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)
Director 10% Owner
X Officer (give title below) Other (specify below)
SVP and General Counsel
3. Date of Earliest Transaction (Month/Day/Year)
12/03/2010
4. If Amendment, Date of Original Filed (Month/Day/Year)
6. Individual or Joint/Group Filing (Check Applicable Line)
X Form filed by One Reporting Person
Form filed by More than One Reporting Person
Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1. Title of Security (Instr. 3) 2. Transaction Date (Month/Day/Year) 2A. Deemed Execution Date, if any (Month/Day/Year) 3. Transaction Code (Instr. 8) 4. Securities Acquired (A) or Disposed Of (D) (Instr. 3, 4 and 5) 5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4) 6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4) 7. Nature of Indirect Beneficial Ownership (Instr. 4)
Code V Amount (A) or (D) Price
Common Stock 12/03/2010 F 13,147(8) D $10.39 40,855 D
Common Stock 12/03/2010 D 40,855 D (1) 0 D
Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned
(e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 3) 2. Conversion or Exercise Price of Derivative Security 3. Transaction Date (Month/Day/Year) 3A. Deemed Execution Date, if any (Month/Day/Year) 4. Transaction Code (Instr. 8) 5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5) 6. Date Exercisable and Expiration Date (Month/Day/Year) 7. Title and Amount of Securities Underlying Derivative Security (Instr. 3 and 4) 8. Price of Derivative Security (Instr. 5) 9. Number of derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4) 10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4) 11. Nature of Indirect Beneficial Ownership (Instr. 4)
Code V (A) (D) Date Exercisable Expiration Date Title Amount or Number of Shares
Stock Option $13.19 12/03/2010 D 26,552 (2) 03/11/2020 Common Stock 26,552 (2) 0 D
Stock Option $24.64 12/03/2010 D 2,537 (3) 01/13/2016 Common Stock 2,537 (3) 0 D
Stock Option $25.05 12/03/2010 D 2,495 (4) 02/17/2016 Common Stock 2,495 (4) 0 D
Stock Option $37.71 12/03/2010 D 3,862 (5) 03/08/2012 Common Stock 3,862 (5) 0 D
Stock Option $37.02 12/03/2010 D 9,125 (6) 03/07/2013 Common Stock 9,125 (6) 0 D
Stock Option $10.4 12/03/2010 D 25,006 (7) 03/03/2019 Common Stock 25,006 (7) 0 D
Explanation of Responses:
1. Disposed of pursuant to merger agreement between issuer, RRI Energy Holdings, Inc., and RRI Energy, Inc. ("RRI") in exchange for 115,823 shares of RRI common stock having a market value of $3.62 per share on the effective date of the merger plus cash consideration for a fractional share of RRI common stock.
2. Upon completion of the merger, this option, which provided for three-year ratable vesting on 3/11/11, 3/11/12 and 3/11/13, vested in full and was converted into an option to purchase 75,274 shares of RRI common stock at $4.66 per share. The reporting person also received cash consideration for that portion of the option relating to a fractional share of RRI common stock.
3. Upon completion of the merger, this fully-vested option was converted into an option to purchase 7,192 shares of RRI common stock at $8.70 per share. The reporting person also received cash consideration for that portion of the option relating to a fractional share of RRI common stock.
4. Upon completion of the merger, this fully-vested option was converted into an option to purchase 7,073 shares of RRI common stock at $8.84 per share. The reporting person also received cash consideration for that portion of the option relating to a fractional share of RRI common stock.
5. Upon completion of the merger, this fully-vested option was converted into an option to purchase 10,948 shares of RRI common stock at $13.31 per share. The reporting person also received cash consideration for that portion of the option relating to a fractional share of RRI common stock.
6. Upon completion of the merger, this option, which provided for three-year ratable vesting on 3/7/09, 3/7/10 and 3/7/11, vested in full and was converted into an option to purchase 25,869 shares of RRI common stock at $13.06 per share. The reporting person also received cash consideration for that portion of the option relating to a fractional share of RRI common stock.
7. Upon completion of the merger, this option, which provided for three-year ratable vesting on 3/3/10, 3/3/11 and 3/3/12, vested in full and was converted into an option to purchase 70,892 shares of RRI common stock at $3.67 per share. The reporting person also received cash consideration for that portion of the option relating to a fractional share of RRI common stock.
8. Reporting person disposed of these shares to satisfy tax withholding obligations related to the vesting of restricted stock units.
/s/ David E. Howard, Attorney-in-Fact 12/07/2010
** Signature of Reporting Person Date
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
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