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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
1203697	R Arthur Block	One Comcast Center Philadelphia PA 19103	Svp, Gc And Secretary	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	2012-03-20	3,540	$0.00	29,837	No	4	M	Direct
Class A Common Stock	Disposition	2012-03-20	1,515	$0.00	28,322	No	4	F	Direct
Class A Common Stock	Disposition	2012-03-21	2,010	$29.79	26,312	No	4	S	Direct

Equity Swap Involved	Form Type	Code	Nature of Ownership
No	4	M	Direct
No	4	F	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	Restricted Stock Units	Disposition	2012-03-20	3,540	$0.00	3,540	$0.00

Remaning Holdings	Exercise Date	Expiration Date	Equity Swap Involved	Transaction Form Type	Transaction Code	Nature of Ownership
189,367			No	4	M	Direct

Footnotes

Transaction was effected pursuant to a Rule 10b5-1 trading plan.
This transaction was executed in multiple trades at prices ranging from $29.79 to $29.80. 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.
Each restricted stock unit represents a contigent right to receive one share of Class A Common Stock.
These restricted stock units vest on the transaction date.