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
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(Print or Type Responses)
1. Name and Address of Reporting Person *
CLARK MARK T
  2. Issuer Name and Ticker or Trading Symbol
FIRSTENERGY CORP [FE]
5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)
_____ Director _____ 10% Owner
__X__ Officer (give title below) _____ Other (specify below)
Senior Vice President
(Last)
(First)
(Middle)
76 SOUTH MAIN STREET
3. Date of Earliest Transaction (Month/Day/Year)
03/01/2005
(Street)

AKRON, OH 44308
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 03/01/2005   A   50,000 (1) A $ 41.42 50,591.113 D  
Common Stock               5,561.0759 I In Savings Plan

Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
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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 (Right to buy) $ 19.31             03/01/2004 03/01/2010 Common Stock 10,000   10,000 D  
Stock Options (Right to buy) $ 24.28             02/19/2002 11/17/2005 Common Stock 5,000   5,000 D  
Stock Options (Right to buy) $ 27.75             11/22/2004 11/22/2010 Common Stock 5,000   5,000 D  
Stock Options (Right to buy) $ 29.5             05/16/2005 05/16/2011 Common Stock 15,000   15,000 D  
Stock Options (Right to buy) $ 29.71             03/01/2004 03/01/2013 Common Stock 17,700   17,700 D  
Stock Options (Right to buy) $ 29.87             03/01/2003 03/01/2009 Common Stock 3,190   3,190 D  
Stock Options (Right to buy) $ 34.45             04/01/2003 04/01/2012 Common Stock 12,000   12,000 D  
Stock Options (Right to buy) $ 38.76             03/01/2005 03/01/2014 Common Stock 20,300   20,300 D  
Phantom / Retirement $ 1               (2)   (2) Common Stock 2,591.5649   2,591.5649 D  
Phantom3/04D $ 1             03/12/2004 03/01/2007 Common Stock 1,998.773   1,998.773 D  
Phantom 3/05D $ 1             02/25/2005 03/01/2008 Common Stock 2,341.343   2,341.343 D  
RSUP1 $ 1 (3) 03/01/2005   A   3,713 (4)   03/01/2008 03/01/2008 Common Stock 3,713 $ 41.42 3,713 D  

Reporting Owners

Reporting Owner Name / Address Relationships
 Director  10% Owner  Officer  Other
CLARK MARK T
76 SOUTH MAIN STREET
AKRON, OH 44308
      Senior Vice President  

Signatures

 David W. Whitehead, POA   03/03/2005
**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) This restricted stock was issued on 3/1/2005, and vests in 5 years at 100%.
(2) This transaction reflects the extension and vesting of phantom stock to "retirement" or " other termination of employment" under arrangements approved by the Compensation Committee.
(3) 1 for 1
(4) The performance based restricted stock units, which were granted March 1, 2005, will earn dividends. The reported number of units reflects 75% of the total amount of units granted, and is the amount the employee is guaranteed to realize. The actual number realized could be 25% higher or 25% lower than the total amount of units granted.

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