FORM 4
[ ] Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).         
UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP OF SECURITIES
                                                                                  
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Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934 or Section 30(h) of the Investment Company Act of 1940
                      

1. Name and Address of Reporting Person *

ROBERTS BRIAN L 		2. Issuer Name and Ticker or Trading Symbol

COMCAST CORP [ CMCSA ] 		5. Relationship of Reporting Person(s) to Issuer (Check all applicable)

__ X __ Director                      _____ 10% Owner
__ X __ Officer (give title below)      _____ Other (specify below)
Chairman of Board, Pres. & CEO
(Last)          (First)          (Middle)

ONE COMCAST CENTER 		3. Date of Earliest Transaction (MM/DD/YYYY)

12/14/2017
(Street)

PHILADELPHIA, PA 19103
(City)        (State)        (Zip)
4. If Amendment, Date Original Filed (MM/DD/YYYY)

 
6. Individual or Joint/Group Filing (Check Applicable Line)

_ X _ Form filed by One Reporting Person
___ Form filed by More than One Reporting Person

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1.Title of Security
(Instr. 3) 		2. Trans. Date 2A. Deemed Execution Date, if any 3. Trans. Code
(Instr. 8) 		4. Securities Acquired (A) or Disposed of (D)
(Instr. 3, 4 and 5) 		5. Amount of Securities Beneficially Owned Following Reported Transaction(s)
(Instr. 3 and 4) 		6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4) 7. Nature of Indirect Beneficial Ownership (Instr. 4)
Code V Amount (A) or (D) Price
Class A Common Stock   12/14/2017     M (1)    800000.0000   A $9.4900   1711798.0000   D    
Class A Common Stock   12/14/2017     S (1)    318835.0000   D $38.4700   (2) 1392963.0000   D    
Class A Common Stock   12/14/2017     F (1)    481165.0000   D $38.7700   911798.0000   D    
Class A Common Stock   12/14/2017     S (1)    265000.0000   D $38.9008   (3) 286044.0000   I   By Spouse  
Class A Common Stock                  480.0000   I   By Daughter  
Class A Common Stock                  22752309.0000   I   By LLC  
Class A Common Stock                  1195090.0000   I   By Trusts  

Table II - Derivative Securities Beneficially Owned ( e.g. , puts, calls, warrants, options, convertible securities)
1. Title of Derivate Security
(Instr. 3) 		2. Conversion or Exercise Price of Derivative Security 3. Trans. Date 3A. Deemed Execution Date, if any 4. Trans. Code
(Instr. 8) 		5. Number of Derivative Securities Acquired (A) or Disposed of (D)
(Instr. 3, 4 and 5) 		6. Date Exercisable and Expiration Date 7. Title and Amount of Securities Underlying Derivative Security
(Instr. 3 and 4) 		8. Price of Derivative Security
(Instr. 5) 		9. Number of derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4) 10. Ownership Form of Derivative Security: Direct (D) or Indirect (I) (Instr. 4) 11. Nature of Indirect Beneficial Ownership (Instr. 4)
Code V (A) (D) Date Exercisable Expiration Date Title Amount or Number of Shares
Option to Purchase   $9.4900   12/14/2017     M   (1)       800000.0000    3/28/2009   3/27/2018   Class A Common Stock   800000.0000   $9.4900   806000.0000   D    

Explanation of Responses:
(1)  Transaction was effected pursuant to a Rule 10b5-1 trading plan.
(2)  This transaction was executed in multiple trades at prices ranging from $38.22 to $38.80. 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.
(3)  This transaction was executed in multiple trades at prices ranging from $38.195 to $39.675. 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.

Reporting Owners
Reporting Owner Name / Address
Relationships
Director 10% Owner Officer Other
ROBERTS BRIAN L
ONE COMCAST CENTER
PHILADELPHIA, PA 19103 		X
Chairman of Board, Pres. & CEO

Signatures
Arthur R. Block, Attorney-in-fact 12/15/2017
** Signature of Reporting Person Date


Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
* If the form is filed by more than one reporting person, see Instruction 4(b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations. See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB control number.
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