EXELON CORP — Director's Dealing 2012

Mar 14, 2012

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: EXELON CORP (EXC)
CIK: 0001109357
Period of Report: 2012-03-12

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

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2012-03-12	Common Stock	A	19659	—	Acquired	19659	Direct
2012-03-12	Common Stock- 401k Plan Shares	A	7838	—	Acquired	7838	Indirect
2012-03-12	Common Stock	A	11658	—	Acquired	11658	Indirect

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2012-03-12	NQ Stock Options 02/24/2005	$54.80	A	27090	Acquired		Common stock (27090)	Direct
2012-03-12	NQ Stock Options 02/22/2007	$81.56	A	22822	Acquired		Common stock (22822)	Direct
2012-03-12	NQ Stock Options 02/21/2008	$101.05	A	18590	Acquired		Common stock (18590)	Direct
2012-03-12	NQ Stock Options 02/27/2009	$21.25	A	83830	Acquired		Common Stock (83830)	Direct
2012-03-12	NQ Stock Options 02/26/2010	$37.71	A	45886	Acquired		Common stock (45886)	Direct
2012-03-12	NQ Stock Options 02/25/2011	$32.46	A	67192	Acquired		Common stock (67192)	Direct
2012-03-12	NQ Stock Options 02/24/2012	$39.24	A	94255	Acquired		Common stock (94255)	Direct

Footnotes

F1: Common stock acquired pursuant to the Agreement and Plan of Merger (the "Merger") between Exelon Corporation ("Exelon"), Bolt Acquisition Corporation and Constellation Energy Group, Inc. ("Constellation"), whereby each share of Constellation common stock was converted to 0.93 share of Exelon common stock and a cash payment being made for any fractional shares.

F2: Common stock held in a multi-fund 401(k) plan, acquired pursuant to the Merger, whereby each share of Constellation common stock was converted to 0.93 share of Exelon common stock and a cash payment being made for any fractional shares.

F3: Non qualified employee stock options originally granted by Constellation that vested and were converted pursuant to the Merger. Each Constellation option was converted into an option to purchase Exelon common stock at the rate of 0.93 shares of Exelon common stock for each share of Constellation common stock at a strike price equal to the quotient of the original Constellation strike price and 0.93.

F4: Non qualified employee stock options originally granted by Constellation that were converted pursuant to the Merger. Each Constellation option was converted into an option to purchase Exelon common stock at the rate of 0.93 shares of Exelon common stock for each share of Constellation common stock at a strike price equal to the quotient of the original Constellation strike price and 0.93. These stock options were granted on 2/24/12 and 1/3 will vest on each of 2/24/13, 2/24/14, and 2/24/15.