X0202 4 2005-12-28 0 0000813828 VIACOM INC VIA, VIAB 0001204726 REDSTONE SUMNER M 1515 BROADWAY NEW YORK NY 10036 1 1 1 0 Chairman & CEO 0001140175 NAIRI INC 200 ELM STREET DEDHAM MA 02026 1 0 1 0 0000913264 NATIONAL AMUSEMENTS INC /MD/ 200 ELM STREET DEDHAM MA 02026 1 0 1 0 Class B common stock 2005-12-28 4 D 0 1163486 34.4819 D 79619055 I By NAIRI, Inc. Class B common stock 463520 D Class B common stock 265 I By 401(k) Class B common stock 200 I By Spouse Shares sold to Viacom Inc. (Viacom) pursuant to a previously disclosed agreement among NAIRI, Inc. (NAIRI), National Amusements Inc. (NAI) and Viacom, pursuant to which NAIRI and NAI participate in Viacom's stock purchase program on a pro-rata basis. Calculated in accordance with the terms of the agreement referred to in footnote 1. These securities are owned directly by NAIRI, but may also be deemed to be beneficially owned by (1) NAIRI's parent corporation, NAI, and (2) Sumner M. Redstone, who is the controlling stockholder of NAI. By: /s/ Michael D. Fricklas, Attorney-in-Fact 2005-12-29 By: /s/ Richard J. Sherman, Vice President 2005-12-29 By: /s/ Richard J. Sherman, Vice President 2005-12-29