X0306 4 2014-08-12 0001166691 COMCAST CORP CMCSA 0001393014 Angelakis Michael J ONE COMCAST CENTER PHILADELPHIA PA 19103 1 Vice Chairman and CFO Class A Common Stock 2014-08-12 4 M 0 280000.0000 18.3400 A 448919.2460 D Class A Common Stock 2014-08-12 4 M 0 103500.0000 14.5400 A 552419.2460 D Class A Common Stock 2014-08-12 4 M 0 24090.0000 18.9800 A 576509.2460 D Class A Common Stock 2014-08-12 4 M 0 12386.0000 25.9500 A 588895.2460 D Class A Common Stock 2014-08-12 4 F 0 8968.0000 53.7500 D 579927.2460 D Class A Common Stock 2014-08-12 4 F 0 15776.0000 53.7300 D 564151.2460 D Class A Common Stock 2014-08-12 4 F 0 63218.0000 53.7200 D 500933.2460 D Class A Common Stock 2014-08-12 4 S 0 150590.0000 53.6947 D 350343.2460 D Class A Common Stock 2014-08-12 4 F 0 181424.0000 53.9000 D 168919.2460 D Class A Common Stock 48551.0000 I By Trust Option to Purchase 18.3400 2014-08-12 4 M 0 280000.0000 0.0000 D 2020-03-25 Class A Common Stock 280000.0000 425400.0000 D Option to Purchase 14.5400 2014-08-12 4 M 0 103500.0000 0.0000 D 2010-03-27 2019-03-26 Class A Common Stock 103500.0000 172500.0000 D Option to Purchase 18.9800 2014-08-12 4 M 0 24090.0000 0.0000 D 2009-03-28 2018-03-27 Class A Common Stock 24090.0000 96360.0000 D Option to Purchase 25.9500 2014-08-12 4 M 0 12386.0000 0.0000 D 2009-03-30 2017-03-30 Class A Common Stock 12386.0000 37161.0000 D Transaction was effected pursuant to a Rule 10b5-1 trading plan. This transaction was executed in multiple trades at prices ranging from $53.680 to $54.030. 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. Arthur R. Block, Attorney-in-fact 2014-08-13