SEC FORM 3

SEC Form 3

FORM 3

UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

INITIAL STATEMENT OF BENEFICIAL OWNERSHIP OF SECURITIES

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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1. Name and Address of Reporting Person^*

DOLAN-SWEENEY DEBORAH A

(Last)

(First)

(Middle)

340 CROSSWAYS PARK DRIVE

(Street)

WOODBURY

11797

(City)

(State)

(Zip)

2. Date of Event Requiring Statement (Month/Day/Year)
03/19/2004

3. Issuer Name and Ticker or Trading Symbol
CABLEVISION SYSTEMS CORP /NY [ CVS ]

4. Relationship of Reporting Person(s) to Issuer
(Check all applicable)

Director		10% Owner
Officer (give title below)	X	Other (specify below)
		Member of 13(d) Group

5. 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 Beneficially Owned
1. Title of Security (Instr. 4)	2. Amount of Securities Beneficially Owned (Instr. 4)	3. Ownership Form: Direct (D) or Indirect (I) (Instr. 5)	4. Nature of Indirect Beneficial Ownership (Instr. 5)
Class A Common Stock	6,381	D
Class A Common Stock	58,637⁽¹⁾	I	By Spouse⁽²⁾

Table II - Derivative Securities Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 4)	2. Date Exercisable and Expiration Date (Month/Day/Year)		3. Title and Amount of Securities Underlying Derivative Security (Instr. 4)		4. Conversion or Exercise Price of Derivative Security	5. Ownership Form: Direct (D) or Indirect (I) (Instr. 5)	6. Nature of Indirect Beneficial Ownership (Instr. 5)
1. Title of Derivative Security (Instr. 4)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares	4. Conversion or Exercise Price of Derivative Security	5. Ownership Form: Direct (D) or Indirect (I) (Instr. 5)	6. Nature of Indirect Beneficial Ownership (Instr. 5)
Options (Right to Buy) w/Tandem SARs	05/02/1994	05/03/2004	Class A Common Stock	1,190	$2.6102	I	By Spouse⁽²⁾
Options (Right to Buy) w/Tandem SARs	05/02/1994	05/03/2004	Class A Common Stock	2,000	$8.9457	I	By Spouse⁽²⁾
Options (Right to Buy) w/Tandem SARs	05/01/1996	05/02/2006	Class A Common Stock	2,262	$3.0763	I	By Spouse⁽²⁾
Options (Right to Buy) w/Tandem SARs	05/01/1996	05/02/2006	Class A Common Stock	3,800	$10.5432	I	By Spouse⁽²⁾
Options (Right to Buy) w/Tandem SARs	05/29/1998	05/30/2008	Class A Common Stock	3,870	$6.8829	I	By Spouse⁽²⁾
Options (Right to Buy) w/Tandem SARs	05/31/2000	06/01/2010	Class A Common Stock	13,695	$15.568	I	By Spouse⁽²⁾
Class B Common Stock	⁽³⁾	⁽³⁾	Class A Common Stock	2,021,043	$0	I	By Trusts⁽⁴⁾
Class B Common Stock	⁽³⁾	⁽³⁾	Class A Common Stock	7,977,325	$0	I	By Dolan Family LLC⁽⁵⁾

Explanation of Responses:

1. Includes restricted shares.

2. Reporting person disclaims beneficial ownership of securities held by her spouse and this report shall not be deemed to be an admission that such person is the beneficial owner of such securities.

3. Class B Common Stock of Issuer is convertible at the option of the holder share for share into Class A Common Stock of the Issuer.

4. Reporting person is co-trustee and contingent beneficiary of various family trusts. Reporting person disclaims beneficial ownership of these securities except to the extent of her pecuniary interest and this report shall not be deemed to be an admission that such person is the beneficial owner of such securities.

5. Reporting person is co-trustee and contingent beneficiary of various family trusts which are members of Dolan Family LLC. Reporting person disclaims beneficial ownership of these securities except to the extent of her pecuniary interest and this report shall not be deemed to be an admission that such person is the beneficial owner of such securities.

	William A. Frewin, Jr., Attorney-in-fact for Deborah A. Dolan-Sweeney	03/19/2004
	** 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 5 (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.