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SEC FORM 4 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 		 
OMB APPROVAL
OMB Number: 3235-0287
Estimated average burden
hours per response: 0.5
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*
ALCHIN JOHN R
(Last) (First) (Middle)
COMCAST CORPORATION
1500 MARKET STREET
(Street)
PHILADELPHIA PA 19102
(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)
EVP, Treasurer & Co-CFO
3. Date of Earliest Transaction (Month/Day/Year)
07/08/2004
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 Special Common Stock(1) 07/08/2004 F 35,399.9989 D $27.29 96,572.9604 D
Class A Special Common Stock(1) 07/08/2004 M 9,486.7185 A $10.5834 106,059.6789 D
Class A Special Common Stock(1) 07/08/2004 M 15,006.0557 A $10.5834 121,065.7346 D
Class A Special Common Stock(1) 07/08/2004 M 10,907.2247 A $9.5625 131,972.9593 D
Class A Special Common Stock 29.232 I By 401(k)
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(2) $10.5834 07/08/2004 M 23,588(3) (4) 07/10/2004 Class A Special Common Stock 23,588 $0 37,312 D
Option to Purchase(2) $10.5834 07/08/2004 M 37,312(3) (4) 07/10/2004 Class A Special Common Stock 37,312 $0 0.0000 D
Option to Purchase(2) $9.5625 07/08/2004 M 29,832(3) (4) 07/10/2004 Class A Special Common Stock 29,832 $0 0.0000 D
Phantom Stock $0.0000(5) 07/08/2004 M 55,332.0011(3) (3) (3) Class A Special Common Stock 55,332.0011 $0 55,332.0011 D
Explanation of Responses:
1. Shares withheld for payment of option exercise price and to pay applicable tax liability - See Table II.
2. This is an option to purchase Class A Special Common Stock.
3. The reporting person elected to defer receipt of shares of Class A Special Common Stock issuable upon exercise of options, resulting in an acquisition of phantom shares. Phantom shares will be paid in cash or shares, at the election of the reporting person, and may be re-deferred at future dates.
4. This option is immediately exercisable.
5. These securities convert on a one-to-one basis.
Remarks:
/s/ Alchin, John R. 07/09/2004
** 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 Number.