X0508 4 2023-11-14 0001166691 COMCAST CORP CMCSA 0001063948 ROBERTS BRIAN L ONE COMCAST CENTER PHILADELPHIA PA 19103 1 1 Chairman of Board & CEO 0 Class A Common Stock 2023-11-14 4 G 0 276719.0000 0.0000 D 17525660.0000 I By Trusts Class A Common Stock 2023-11-14 4 S 0 616143.0000 41.9179 D 16909517.0000 I By Trusts Class A Common Stock 6951876.5260 D Class A Common Stock 286044.0000 I By Spouse This transaction was executed in multiple trades at prices ranging from $41.770 to $42.215. 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. Reflects exempt estate planning transactions pursuant to Rule 16a-13 that resulted in a net increase in the number of shares of Class A common stock (i) directly owned by the Reporting Person and (ii) indirectly owned by the Trusts and a corresponding net decrease in the number of shares of Class A common stock indirectly owned by the LLC. Elizabeth Wideman, Attorney-in-fact 2023-11-15