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: SHATTUCK MAYO A III (Director, Executive Chairman)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2012-03-12	Common Stock- Stock Units	A	140387	—	Acquired	140387	Direct
2012-03-12	Common Stock	A	430941	—	Acquired	430941	Direct
2012-03-12	Common Stock- 401k Plan Shares	A	1672	—	Acquired	1672	Indirect

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2012-03-12	NQ Stock Options 02/26/2004	$42.62	A	171838	Acquired		Common Stock (171838)	Direct
2012-03-12	NQ Stock Options 02/24/2005	$54.80	A	310815	Acquired		Common stock (310815)	Direct
2012-03-12	NQ Stock Options 12/21/2005	$62.73	A	70562	Acquired		Common stock (70562)	Direct
2012-03-12	NQ Stock Options 02/22/2007	$81.56	A	272527	Acquired		Common stock (272527)	Direct
2012-03-12	NQ Stock Options 02/21/2008	$101.05	A	210691	Acquired		Common stock (210691)	Direct
2012-03-12	NQ Stock Options 02/27/2009	$21.25	A	726562	Acquired		Common Stock (726562)	Direct
2012-03-12	NQ Stock Options 02/26/2010	$37.71	A	379337	Acquired		Common stock (397337)	Direct
2012-03-12	NQ Stock Options 02/25/2011	$32.46	A	465892	Acquired		Common stock (465892)	Direct
2012-03-12	NQ Stock Options 02/24/2012	$39.24	A	653511	Acquired		Common stock (653511)	Direct

Footnotes

F1: Stock units acquired pursuant to the Agreement and Plan of Merger (the "Merger") between Exelon Corporation, ("Exelon"), Bolt Acquistion Corporation and Constellation Energy Group, Inc. ("Constellation") whereby each Constellation stock unit was converted to 0.93 Exelon stock units and a cash payment being made for any fractional shares. Stock units have a sales restriction that will lapse on 12/26/2012.

F2: Common stock 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: 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.

F4: 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.

F5: 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.