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 *
HILZINGER MATTHEW F
   2. Issuer Name and Ticker or Trading Symbol
EXELON CORP [EXC] 		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 and CFO
(Last)
(First)
(Middle)
10 SOUTH DEARBORN STREET, 54TH FLOOR		 3. Date of Earliest Transaction (Month/Day/Year)
08/01/2009
(Street)

CHICAGO, IL 60603		 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 08/01/2009   M   8,000 A $ 50.86 14,201 D  
Common Stock 08/01/2009   F   2,934 (1) D $ 50.86 11,268 D  
Common Stock 401(k) shares               557 (2) D  

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
Restricted Stock Units 08/01/2004 $ 0 (3) 08/01/2009   M     8,000   (3)   (3) Common Stock 8,000 $ 50.86 0 D  
Restricted Stock Units 08/01/2008 $ 0 (4)               (4)   (4) Common Stock 5,000   5,000 D  
Performance Shares- Stock Units $ 0 (5)               (5)   (5) Common Stock 10,058   10,058 (6) D  

Reporting Owners

Reporting Owner Name / Address Relationships
 Director  10% Owner  Officer  Other
HILZINGER MATTHEW F
10 SOUTH DEARBORN STREET
54TH FLOOR
CHICAGO, IL 60603		       Senior Vice President and CFO  

Signatures

 Scott N. Peters, Attorney in Fact for Matthew F. Hilzinger   08/04/2009
**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) Shares witheld to satisfy the reporting person's income tax liability due upon vesting.
(2) Shares held as of 6/30/2009 in a multi-fund 401(k) Plan to be settled in cash upon the reporting person's termination of employment for any reason on a 1:1 basis. Shares are acquired through regular periodic contributions, company matching contributions, and the automatic reinvestment of dividends.
(3) Restricted stock units granted 08/01/2004 under the Issuer's Long Term Incentive Plan. Restricted stock units may be settled on a 1 for 1 basis in shares of Exelon common stock.
(4) Restricted stock units granted 08/01/2008 under the Issuer's Long Term Incentive Plan. Restricted stock units may be settled on a 1 for 1 basis in shares of Exelon common stock. 100% of the shares will vest on 08/01/2013.
(5) Performance shares awarded pursuant to the Exelon Long Term Incentive PLan. 1/3 of the shares awarded vest immediately upon receipt. The remaining shares vest in 1/3 increments on each of the second and third anniversaries of the award date. Under certain circumstances, some or all of the vested shares may be settled in cash on a 1 for 1 basis based on teh cash value of the underlying stock on the date of vesting.
(6) Balance includes the acquisition of 113 shares on 03/10/2009 and 105 shares on 06/10/2009 through the automatic dividend reinvestment feature of Exelon plans.

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