X0303 4 2010-05-21 0001053112 CABLEVISION SYSTEMS CORP /NY CVC 0000933025 DOLAN-SWEENEY DEBORAH A 340 CROSSWAYS PARK DRIVE WOODBURY NY 11797 1 1 Member of 13(d) Group Cablevision NY Group Class A Common Stock 2010-05-21 4 A 0 4741 0 A 19330 D Cablevision NY Group Class A Common Stock 109928 I By Spouse Cablevision NY Group Class A Common Stock 16000 I By Trusts Grant of restricted stock units under the 2006 Stock Plan For Non-Employee Directors. All the units are fully vested on the date of grant and are settled in stock (one share of Class A common stock for each unit) 90 days after the termination of service on the Board of Directors. Includes restricted stock units. Includes restricted shares. Securities held directly by Ms Deborah Dolan-Sweeney's spouse, Brian G. Sweeney. Ms. Dolan-Sweeney disclaims beneficial ownership of these securities and this report shall not be deemed to be an admission that she is the beneficial owner of such securities for purposes of Section 16 or for any other purpose. Securities held in trusts for which Mr. Sweeney serves as co-trustee. Both he and Ms. Dolan-Sweeney disclaim beneficial ownership of these securities and this report shall not be deemed an admission that they are the beneficial owners of such securities for purposes of Section 16 or for any other purpose. /s/ Brian G. Sweeney, attorney-in-fact for Deborah A. Dolan 2010-05-24