X0303 4 2011-05-12 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 2011-05-12 4 M 0 22000.0000 5.2000 A 78077.0000 D CBS Class B common stock 2011-05-12 4 S 0 22000.0000 26.5485 D 56077.0000 D CBS Class B common stock 2011-05-13 4 M 0 22000.0000 5.2000 A 78077.0000 D CBS Class B common stock 2011-05-13 4 S 0 22000.0000 26.2669 D 56077.0000 D CBS Class B common stock 3868.0000 I By 401(k) Employee Stock Option (right to buy) 5.2000 2011-05-12 4 M 0 22000.0000 0.0000 D 2010-02-24 2017-02-24 CBS Class B common stock 22000.0000 307018.0000 D Employee Stock Option (right to buy) 5.2000 2011-05-13 4 M 0 22000.0000 0.0000 D 2010-02-24 2017-02-24 CBS Class B common stock 22000.0000 285018.0000 D The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on March 8, 2011. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $26.37 to $26.81, inclusive. The reporting person undertakes to provide upon request by the staff of the U.S. Securities and Exchange Commission, the Issuer or any security holder of the Issuer, full information regarding the number of shares sold at each separate price within the range set forth in this footnote. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $25.99 to $26.71, inclusive. The reporting person undertakes to provide upon request by the staff of the U.S. Securities and Exchange Commission, the Issuer or any security holder of the Issuer, full information regarding the number of shares sold at each separate price within the range set forth in this footnote. Right to buy under Issuer's long term incentive plan. These options vest in four equal annual installments beginning on February 24, 2010. /s/ Joseph R. Ianniello 2011-05-13