X0303 4 2010-05-25 0000813828 CBS CORP CBS, CBS.A 0001333949 Ianniello Joseph R 51 WEST 52ND STREET NEW YORK NY 10019 1 EVP and CFO CBS Class B common stock 2010-05-25 4 M 0 3565 0 A 54953 D CBS Class B common stock 2010-05-25 4 F 0 1791 13.89 D 53162 D CBS Class B common stock 3478 I By 401(k) Restricted Share Units 2010-05-25 4 M 0 3565 0 D 2007-05-25 CBS Class B common stock 3565 0 D On May 25, 2010, the closing price of the CBS Class B common stock on the NYSE was $13.89. Granted under the Issuer's long term incentive plan. The Restricted Share Units vest in four equal annual installments beginning on May 25, 2007 and are settled by delivery of a corresponding number of the Issuer's shares upon vesting. /s/ Joseph R. Ianniello 2010-05-26