EXELON CORP — Director's Dealing 2010

Jan 27, 2010

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: EXELON CORP (EXC)
CIK: 0001109357
Period of Report: 2010-01-25

Reporting Person: GILLIS RUTH ANN M (Executive Vice President)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2010-01-25	Common Stock	M	15988	$46.09	Acquired	25491	Direct
2010-01-25	Common Stock	F	4887	$46.09	Disposed	20604	Direct
2010-01-25	Common Stock	D	11101	$46.09	Disposed	9504	Direct

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2010-01-25	Performance Shares - Stock Units	$	A	9560	Acquired		Common Stock (9560)	Direct
2010-01-25	Performance Shares - Stock Units	$	M	15988	Disposed		Common Stock (15988)	Direct
2010-01-25	NQ Stock Options 01/25/2010	$46.09	A	22400	Acquired		Common Stock (22400)	Direct

Holdings (Non-Derivative)

Security	Shares	Ownership
Common Stock 401(k) Shares	26	Direct
Common Stock (Deferred Shares)	44304	Indirect
Common Stock	19101	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, the second 1/3 of the grant made in January 2009 and the third and final 1/3 of the grant made in January 2008.

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

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

F5: Shares held as of 12/31/2009 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.

F6: Non qualified employee stock options, awarded pursuant to the Exelon Long Term Incentive Plan. Options vest in 1/4 increments on each of the first four anniversaries of the grant date, referenced in column one, and expire on the tenth anniversay of the grant date.