EXELON CORP — Director's Dealing 2012

Aug 3, 2012

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: EXELON CORP (EXC)
CIK: 0001109357
Period of Report: 2012-08-03

Reporting Person: DeFontes Kenneth William Jr. (President & CEO, BGE)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2012-08-03	Common Stock	M	7500	$21.25	Acquired	17691	Direct
2012-08-03	Common Stock	S	7500	$38.33	Acquired	10191	Direct

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2012-08-03	NQ Stock Options 02/27/2009	$21.25	M	7500	Disposed		Common Stock (7500)	Direct

Holdings (Non-Derivative)

Security	Shares	Ownership
Common Stock - Restricted Stock Units	9668	Direct
Common Stock- 401k Plan Shares	7971	Indirect
Common Stock	11777	Indirect

Footnotes

F1: Exercise and all reported sales made pursuant to a rule 10b5-1 trading plan entered into on June 13, 2012.

F2: Common stock as of 07/31/2012 held in a multi-fund 401(k) plan.

F3: Non qualified employee stock options originally granted pursuant to the Constellation Energy Group Long Term Incentive Plan. Each Constellation option was converted from the right to purchase 1 share of Constellation common stock to the right to purchase 0.93 shares of Exelon common at a strike price equal to the quotient of the original Constellation strike price and 0.93. This grant became fully vested upon conversion on March 12, 2012. Options expire 10 years from the grant date referenced in Column 1.

F4: Balance includes 103 shares acquired on 06/08/2012 through automatic dividend reinvestment.

F5: Restricted stock units originally granted pursuant to the Constellation Energy Group Long Term Incentive Plan and each stock unit was converted to 0.93 stock units of Exelon Corporation on March 12, 2012. Stock units will settle in shares of Exelon common stock on a 1 for 1 basis upon vesting. Award will vest 1/3 in February 2013, 1/3 in February 2014 and 1/3 in February 2015.

F6: Balance includes 97 shares aquired on 06/08/2012 through automatic dividend reinvestment.

F7: Balance inlcudes 119 shares acquired on 06/08/2012 through automatic dividend reinvestment.