FORM 4 Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP OF SECURITIES Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934, Section 17(a) of the Public Utility Holding Company Act of 1935 or Section 30(h) of the Investment Company Act of 1940

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1. Name and Address of Reporting Person * Legro Thomas   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) Sr. VP and Controller (Last) (First) (Middle) 1155 PERIMETER CENTER WEST 3. Date of Earliest Transaction (Month/Day/Year) 05/22/2008 (Street) ATLANTA, GA 30338 4. If Amendment, Date 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 (City) (State) (Zip) 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 05/22/2008   M   20,292 A $ 24.64 20,292 D   Common Stock 05/22/2008   M   19,959 A $ 25.05 40,251 D   Common Stock 05/22/2008   M   3,523 A $ 37.71 43,774 D   Common Stock 05/22/2008   S   43,774 D $ 41.59 (1) 0 D

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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 Underlying Securities (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 of Derivative Security: 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 Options

$ 24.64

05/22/2008

M

20,292

(2)

01/13/2016

Common Stock

20,292

$ 0

6,764

D

Stock Options

$ 25.05

05/22/2008

M

19,959

(3)

02/17/2016

Common Stock

19,959

$ 0

6,654

D

Stock Options

$ 37.71

05/22/2008

M

3,523

(4)

03/08/2012

Common Stock

3,523

$ 0

7,044

D

Reporting Owners

Reporting Owner Name / Address	Relationships
	Director	10% Owner	Officer	Other
Legro Thomas 1155 PERIMETER CENTER WEST ATLANTA, GA 30338			Sr. VP and Controller

Signatures

/s/ Julia A. Houston, Attorney-in-Fact		05/22/2008
**Signature of Reporting Person		Date

Explanation of Responses:

*	If the form is filed by more than one reporting person, see Instruction 4(b)(v).
**	Intentional misstatements or omissions of facts constitute Federal Criminal Violations. See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
(1)	The average price of the series of common stock on 5/22/2008 was $41.59, with the selling prices ranging from $41.55 to $41.62.
(2)	The stock options were part of a grant of 27,056 options on 1/13/2006 with a 3 year vesting period, 25% on 7/3/2006, 25% on 1/3/2007, 25% on 1/3/2008 and 25% on 1/3/2009. The 20,292 exercised options are those that vested on 7/3/2006, 1/3/2007 and 1/3/2008.
(3)	The stock options were part of a grant of 26,613 options on 2/17/2006 with a 3 year vesting period, 25% on 8/17/2006, 25% on 2/17/2007, 25% on 2/17/2008 and 25% on 2/17/2009. The 19,959 exercised options are those that vested on 8/17/2006, 2/17/2007 and 2/17/2008.
(4)	The stock options were part of a grant of 10,567 options on 3/8/2007 with a 3 year vesting period, 33 1/3% on 3/08/2008, 33 1/3% on 3/8/2009 and 33 1/3% on 3/8/2010. The 3,523 exercised options are those that vested on 3/8/2008.

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