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Filing Details

Issuer

Cik	Name	Symbol	Sector (SIC)	IRS No
1166691	Comcast Corp	CMCSA	Cable & Other Pay Television Services (4841)	270000798

Insiders

Cik	Name	Reported Address	Insider Title	Director	Officer	Large Shareholder	Other
1203695	L David Cohen	One Comcast Center Philadelphia PA 19103	Executive Vice President	No	Yes	No	No

Reported Non-Derivative Transactions

Sec. Name	Acquisiton - Disposition	Date	Amount	Price	Remaning Holdings	Equity Swap Involved	Form Type	Code	Nature of Ownership
Class A Common Stock	Acquisiton	2012-03-15	28,125	$18.08	238,140	No	4	M	Direct
Class A Common Stock	Disposition	2012-03-15	6,593	$29.66	231,547	No	4	S	Direct
Class A Common Stock	Disposition	2012-03-15	21,532	$29.70	210,015	No	4	F	Direct
Class A Common Stock	Disposition	2012-03-15	54,660	$29.57	155,355	No	4	S	Direct
Class A Special Common Stock	Disposition	2012-03-15	19,787	$29.19	41,726	No	4	S	Direct

Equity Swap Involved	Form Type	Code	Nature of Ownership
No	4	M	Direct
No	4	S	Direct
No	4	F	Direct
No	4	S	Direct
No	4	S	Direct

Reported Derivative Transactions

Sec. Name	Sec. Type	Acquisiton - Disposition	Date	Amount	Price	Amount - 2	Price - 2
Class A Common Stock	Option to Purchase	Disposition	2012-03-15	28,125	$0.00	28,125	$18.08

Remaning Holdings	Exercise Date	Expiration Date	Equity Swap Involved	Transaction Form Type	Transaction Code	Nature of Ownership
28,125		2013-02-25	No	4	M	Direct

Reported Non-Derivative Holdings

Sec. Name	Remaning Holdings	Nature of Ownership	Explanation
Class A Common Stock	123,087	Indirect	By GRATs
Class A Common Stock	144,663	Indirect	By Trusts
Class A Special Common Stock	31,509	Indirect	By Trusts

Footnotes

Transaction was effected pursuant to a Rule 10b5-1 trading plan.
This transaction was executed in multiple trades at prices ranging from $29.63 to $29.69. The price reported above reflects the weighted-average price. The reporting person hereby undertakes to provide upon request to the SEC staff, the issuer or a security holder of the issuer full information regarding the number of shares and prices at which the transactions were effected.
This transaction was executed in multiple trades at prices ranging from $29.45 to $29.68. The price reported above reflects the weighted-average price. The reporting person hereby undertakes to provide upon request to the SEC staff, the issuer or a security holder of the issuer full information regarding the number of shares and prices at which the transactions were effected.
This transaction was executed in multiple trades at prices ranging from $29.15 to $29.22. The price reported above reflects the weighted-average price. The reporting person hereby undertakes to provide upon request to the SEC staff, the issuer or a security holder of the issuer full information regarding the number of shares and prices at which the transactions were effected
This option is immediately exercisable.