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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	Evp, 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	2017-03-27	14,180	$9.17	72,758	No	4	M	Direct
Class A Common Stock	Acquisiton	2017-03-27	14,100	$7.27	86,858	No	4	M	Direct
Class A Common Stock	Acquisiton	2017-03-27	10,300	$12.51	97,158	No	4	M	Direct
Class A Common Stock	Disposition	2017-03-27	3,752	$37.19	93,406	No	4	S	Direct
Class A Common Stock	Disposition	2017-03-27	5,866	$37.19	87,540	No	4	S	Direct
Class A Common Stock	Disposition	2017-03-27	6,228	$37.17	81,312	No	4	S	Direct
Class A Common Stock	Disposition	2017-03-27	6,548	$37.19	74,764	No	4	F	Direct
Class A Common Stock	Disposition	2017-03-27	7,872	$37.19	66,892	No	4	F	Direct
Class A Common Stock	Disposition	2017-03-27	8,314	$37.19	58,578	No	4	F	Direct
Class A Common Stock	Acquisiton	2017-03-28	9,900	$9.49	68,478	No	4	M	Direct
Class A Common Stock	Disposition	2017-03-28	4,044	$36.95	64,434	No	4	S	Direct
Class A Common Stock	Disposition	2017-03-28	5,856	$37.08	58,578	No	4	F	Direct

Equity Swap Involved	Form Type	Code	Nature of Ownership
No	4	M	Direct
No	4	M	Direct
No	4	M	Direct
No	4	S	Direct
No	4	S	Direct
No	4	S	Direct
No	4	F	Direct
No	4	F	Direct
No	4	F	Direct
No	4	M	Direct
No	4	S	Direct
No	4	F	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	2017-03-27	10,300	$0.00	10,300	$12.51
Class A Common Stock	Option to Purchase	Disposition	2017-03-27	14,180	$0.00	14,180	$9.17
Class A Common Stock	Option to Purchase	Disposition	2017-03-27	14,100	$0.00	14,100	$7.27
Class A Common Stock	Option to Purchase	Disposition	2017-03-28	9,900	$0.00	9,900	$9.49

Remaning Holdings	Exercise Date	Expiration Date	Equity Swap Involved	Transaction Form Type	Transaction Code	Nature of Ownership
41,200		2021-03-24	No	4	M	Direct
42,540		2020-03-25	No	4	M	Direct
28,200	2010-03-27	2019-03-26	No	4	M	Direct
9,900	2009-03-28	2018-03-27	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 $36.95 to $36.99. 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.
With respect to the number of shares set forth in Column 7, this option is immediately exercisable.