Ownership Submission
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
OMB APPROVAL
OMB Number: 3235-0287
Expires: January 31, 2005
Estimated average burden hours per response... 0.5

(Print or Type Responses)
1. Name and Address of Reporting Person *
Williams S Linn
   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)
Executive V.P & Gen. Counsel
(Last)
(First)
(Middle)
1155 PERIMETER CENTER W		 3. Date of Earliest Transaction (Month/Day/Year)
05/12/2008
(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 05/12/2008   M   40,584 A $ 24.64 40,584 D  
Common Stock 05/12/2008   M   39,920 A $ 25.05 80,504 D  
Common Stock 05/12/2008   S   80,504 D $ 38.24 (3) 0 D  

Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB control number. SEC 1474 (9-02)

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 05/12/2008   M     40,584   (1) 01/13/2016 Common Stock 40,584 $ 0 27,057 D  
Stock Options $ 25.05 05/12/2008   M     39,920   (2) 02/17/2016 Common Stock 39,920 $ 0 26,614 D  

Reporting Owners

Reporting Owner Name / Address Relationships
 Director  10% Owner  Officer  Other
Williams S Linn
1155 PERIMETER CENTER W
ATLANTA, GA 30338		       Executive V.P & Gen. Counsel  

Signatures

 /s/ Julia A. Houston, Attorney-in-Fact   05/13/2008
**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 stock options were part of a grant of 108,225 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. On March 5, 2008, Mr. Williams exercised half of the total vested amount from the vestings on 7/3/2006, 1/3/2007 and 1/3/2008. The 40,584 options exercised are the remaining half of the amounts that vested on on 7/3/2006, 1/3/2007 and 1/3/2008.
(2) The stock options were part of a grant of 106,454 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. On March 5, 2008, Mr. Williams exercised half of the total vested amounts from the vestings on 8/17/2006, 2/17/2007 and 2/17/2008. The 39,920 options exercised are the remaining half of the amounts that vested on 8/17/2006, 2/17/2007 and 2/17/2008.
(3) The average price of the series of sales of common stock on 5/12/2008 was $38.24, with the selling prices ranging from $38.16 to $38.36.

Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.

Potential persons who are to respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB number.