SEC Form 4
FORM 4 UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934
or Section 30(h) of the Investment Company Act of 1940
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Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).
1. Name and Address of Reporting Person*
BLOCK ARTHUR R

(Last) (First) (Middle)
ONE COMCAST CENTER

(Street)
PHILADELPHIA PA 19103

(City) (State) (Zip)
2. Issuer Name and Ticker or Trading Symbol
COMCAST CORP [ CMCSA ]
5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)
Director 10% Owner
X Officer (give title below) Other (specify below)
SVP, GC and Secretary
3. Date of Earliest Transaction (Month/Day/Year)
02/17/2012
4. If Amendment, Date of Original Filed (Month/Day/Year)
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. Transaction Date (Month/Day/Year) 2A. Deemed Execution Date, if any (Month/Day/Year) 3. Transaction 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 02/17/2012 M 69,750 A $17.5 129,913 D
Class A Common Stock 02/17/2012 M 58,800 A $22.66 188,713 D
Class A Common Stock 02/17/2012 M 54,600 A $18.5066 243,313 D
Class A Common Stock 02/17/2012 M 44,550 A $18.98 287,863 D
Class A Common Stock 02/17/2012 M 42,300 A $14.54 330,163 D
Class A Common Stock 02/17/2012 M 39,258 A $17.24 369,421 D
Class A Common Stock 02/17/2012 M 7,500 A $19.92 376,921 D
Class A Common Stock 02/17/2012 M 5,625 A $18.08 382,546 D
Class A Common Stock 02/17/2012 F 4,379 D $28.65 378,167 D
Class A Common Stock 02/17/2012 F 6,128 D $28.65 372,039 D
Class A Common Stock 02/17/2012 S 29,130 D $28.5 342,909 D
Class A Common Stock 02/17/2012 F 29,785 D $28.65 313,124 D
Class A Common Stock 02/17/2012 F 29,866 D $28.65 283,258 D
Class A Common Stock 02/17/2012 F 35,518 D $28.65 247,740 D
Class A Common Stock 02/17/2012 F 42,988 D $28.65 204,752 D
Class A Common Stock 02/17/2012 F 51,415 D $28.65 153,337 D
Class A Common Stock 02/17/2012 F 53,443 D $28.65 99,894 D
Class A Common Stock 02/17/2012 S 68,861 D $28.5 31,033 D
Class A Special Common Stock 02/17/2012 M 5,625 A $15.8933 40,220 D
Class A Special Common Stock 02/17/2012 S 1,446 D $27.62 38,774 D
Class A Special Common Stock 02/17/2012 F 4,179 D $27.79 34,595 D
Class A Special Common Stock 9,091 I By Daughter
Class A Special Common Stock 9,328 I By Son
Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned
(e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 3) 2. Conversion or Exercise Price of Derivative Security 3. Transaction Date (Month/Day/Year) 3A. Deemed Execution Date, if any (Month/Day/Year) 4. Transaction 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 (Month/Day/Year) 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: 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 $18.5066 02/17/2012 M 54,600 (1) 01/19/2016 Class A Common Stock 54,600 $0.0000 13,650 D
Option to Purchase $18.08 02/17/2012 M 5,625 (1) 02/25/2013 Class A Common Stock 5,625 $0.0000 11,250 D
Option to Purchase $19.92 02/17/2012 M 7,500 (1) 03/07/2014 Class A Common Stock 7,500 $0.0000 22,500 D
Option to Purchase $22.66 02/17/2012 M 58,800 (1) 03/13/2015 Class A Common Stock 58,800 $0.0000 14,700 D
Option to Purchase $17.24 02/17/2012 M 39,258 (1) 12/17/2019 Class A Common Stock 39,258 $0.0000 91,602 D
Option to Purchase $17.5 02/17/2012 M 69,750 03/10/2007(1) 03/09/2016 Class A Common Stock 69,750 $0.0000 23,250 D
Option to Purchase $14.54 02/17/2012 M 42,300 03/27/2010(1) 03/26/2019 Class A Common Stock 42,300 $0.0000 98,700 D
Option to Purchase $18.98 02/17/2012 M 44,550 03/28/2009(1) 03/27/2018 Class A Common Stock 44,550 $0.0000 54,450 D
Option to Purchase $15.8933 02/17/2012 M 5,625 (1) 10/26/2012 Class A Special Common Stock 5,625 $0.0000 5,625 D
Explanation of Responses:
1. This option is immediately exercisable.
/s/ Arthur R. Block 02/21/2012
** 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).
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