SEC Form 5 
FORM 5	UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

ANNUAL 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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X	
	
	Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).			
	Form 3 Holdings Reported.
X	
					
	Form 4 Transactions Reported.			
1. Name and Address of Reporting Person*
COMCAST CORP	

(Last)	(First)	(Middle)	
C/O COMCAST CORPORATION	
1500 MARKET STREET	

(Street) 
PHILADELPHIA	PA	19102-2148	

(City)	(State)	(Zip)	
	2. Issuer Name and Ticker or Trading Symbol 
CABLEVISION SYSTEMS CORP /NY [ CVC ] 	5. Relationship of Reporting Person(s) to Issuer 
(Check all applicable) 
	Director	X	10% Owner	
	Officer (give title below)		Other (specify below)	

	3. Statement for Issuer's Fiscal Year Ended (Month/Day/Year)
12/31/2004 		
	4. If Amendment, Date of Original Filed (Month/Day/Year)	6. Individual or Joint/Group Filing (Check Applicable Line) 
	Form filed by One Reporting Person	
X	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 at end of Issuer's Fiscal Year (Instr. 3 and 4) 	6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4) 	7. Nature of Indirect Beneficial Ownership (Instr. 4) 		
				Amount	(A) or (D)	Price					
Class A Stock(1) 	11/15/2004		X/K4(1) 	26,918,195	D	(1)	14,533,487	I	See footnote(2) 		
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) 	
					(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares					
Call Option (obligation to sell)	$43.98 	11/18/2002		4S(3) 		1	11/15/2004	11/15/2004	Class A Stock	26,918,195	(2)	1	I	See footnote(2) 	
Put Option (obligation to buy)	$36.05 	11/18/2002		4P(3) 	1		11/15/2004	11/15/2004	Class A Stock	26,918,195	(2)	1	I	See footnote(2) 	
Call Option (obligation to sell)	$43.98 	11/15/2004		4E(1) 		1	11/15/2004	11/15/2004	Class A Stock	26,918,195	(1)	0	I	See footnote(2) 	
Put Option (obligation to buy)	$36.05 	11/15/2004		4X(1) 		1	11/15/2004	11/15/2004	Class A Stock	26,918,195	(1)	0	I	See footnote(2) 	
1. Name and Address of Reporting Person*
COMCAST CORP	

(Last)	(First)	(Middle)	
C/O COMCAST CORPORATION	
1500 MARKET STREET	

(Street) 
PHILADELPHIA	PA	19102-2148	

(City)	(State)	(Zip)	
	
1. Name and Address of Reporting Person*
COMCAST CABLE COMMUNICATIONS HOLDINGS INC	

(Last)	(First)	(Middle)	
C/O COMCAST CORPORATION	
1500 MARKET STREET	

(Street) 
PHILADELPHIA	PA	19102-2148	

(City)	(State)	(Zip)	
	
1. Name and Address of Reporting Person*
CVC Keep Well, LLC	

(Last)	(First)	(Middle)	
C/O COMCAST CORPORATION	
1500 MARKET STREET	

(Street) 
PHILADELPHIA	PA	19102-2148	

(City)	(State)	(Zip)	
	
1. Name and Address of Reporting Person*
Comcast ABB CSC Holdings, Inc.	

(Last)	(First)	(Middle)	
C/O COMCAST CAPITAL CORPORATION	
1201 NORTH MARKET STREET, SUITE 1000	

(Street) 
WILMINGTON	DE	19801	

(City)	(State)	(Zip)	
	
1. Name and Address of Reporting Person*
Comcast ABB CSC II, Inc.	

(Last)	(First)	(Middle)	
C/O COMCAST CAPITAL CORPORATION	
1201 NORTH MARKET STREET, SUITE 1000	

(Street) 
WILMINGTON	DE	19801	

(City)	(State)	(Zip)	
	
Explanation of Responses:	
1. On November 15, 2004, the forward contract described in footnote (3) matured and Comcast delivered an aggregate of 26,918,195 shares of Cablevision NY Group Class A Common Stock, par value $0.01 per share ("Class A Stock") in satisfaction of its obligations thereunder.	
2. Of the 14,533,487 shares of Class A Stock that are being reported as having been owned by Comcast Corporation at the end of the issuer's fiscal year end, 11,660,795 shares of Class A Stock were owned by Comcast ABB CSC Holdings, Inc. and 2,872,692 shares of Class A Stock were owned by Comcast ABB CSC II, Inc. Of the shares of Class A stock delivered in settlement of Comcast Corporation's obligations under the forward contracts described in footnote (3), 20,991,124 shares of Class A Stock were owned by Comcast ABB CSC Holdings, Inc. and 5,927,071 shares of Class A Stock were owned by Comcast ABB CSC II, Inc. Comcast Cable Communications Holdings, Inc. is a direct, wholly owned subsidiary of Comcast Corporation. Comcast Cable Communications Holdings, Inc. owns a 61.9% interest in Comcast ABB CSC Holdings, Inc. directly and a 38.1% interest indirectly through its wholly owned subsidiary CVC Keep Well, LLC. Comcast Cable Communications Holdings, Inc. indirectly owns a 100% interest in Comcast ABB CSC II, Inc.	
3. On December 18, 2001, AT&T Broadband Group, through ATTBLLC, monetized 26,918,195 shares of Class A Stock through a forward contract pursuant to which AT&T wrote a covered call option and purchased a put option. On November 18, 2002, Comcast acquired AT&T Broadband Group, including its interests in the forward contract and the underlying Class A Stock. Disclosure regarding Comcast's interests in the forward contract was omitted from its Form 3 filed with the SEC in connection with the aquisition of AT&T Broadband Group.	
	/s/ Arthur R. Block, Senior Vice President	02/17/2006	
	/s/ Arthur R. Block, Senior Vice President	02/17/2006	
	/s/ Arthur R. Block, Senior Vice President	02/17/2006	
	/s/ Rosemarie S. Teta, Vice President	02/17/2006	
	/s/ Rosemarie S. Teta, Vice President	02/17/2006	
	** 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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