EXELON CORP — Director's Dealing 2012

Jan 25, 2012

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: EXELON CORP (EXC)
CIK: 0001109357
Period of Report: 2012-01-23

Reporting Person: O'Brien Denis P. (Executive Vice President)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2012-01-23	Common Stock	M	11198	$39.83	Acquired	16387	Direct
2012-01-23	Common Stock	F	3655	$39.83	Disposed	13182	Direct
2012-01-23	Common Stock	D	2895	$39.83	Disposed	10287	Direct

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2012-01-23	Performance Shares - Stock Units	$	A	20700	Acquired		Common Stock (20700)	Direct
2012-01-23	Performance Shares - Stock Units	$	M	11198	Disposed		Common Stock (11198)	Direct

Holdings (Non-Derivative)

Security	Shares	Ownership
Common Stock - ESPP	1405	Direct
Common Stock (Deferred Shares)	7240	Indirect
Common Stock	20000	Indirect

Footnotes

F1: 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 first and second anniversaries of the grant date. Under certain circumstances some or all of the vested shares may be settled in cash on a 1 for 1 basis based on the cash value of the underlying stock on the date of vesting.

F2: Vested amount includes 1/3 of the current grant and the final 1/3 of the grant made in January 2010.

F3: Shares withheld by the Issuer for reporting person's tax obligation.

F4: Shares settled in cash on a 1 for 1 basis.