Preliminary Proxy Statement

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Definitive Additional Materials

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VIACOM INC.

VIACOM INC.

1515 BROADWAY

NEW YORK, NY 10036

Meeting Information

Meeting Type:           Annual Meeting of Stockholders

Date: 02/06/17           Time: 9:00 a.m., EST

For holders as of:     12/12/16

Location:   Viacom’s Corporate Headquarters

     1515 Broadway

     New York, New York

You are receiving this communication because you hold shares of Viacom Inc. Class A common stock.

This is not a ballot. You cannot use this notice to vote these shares. This communication presents only an overview of the more complete proxy materials that are available to you on the Internet. The Notice of 2017 Annual Meeting of Stockholders and Proxy Statement, Fiscal Year 2016 Annual Report on Form 10-K and Stockholder Letter are available at http://proxymaterials.viacom.com. You may also request a paper copy of these materials (see reverse side).

We encourage you to access and review all of the important information contained in the proxy materials before voting.

See the reverse side of this notice to obtain proxy materials and voting instructions.

Proxy Materials Available to VIEW or RECEIVE:

1. NOTICE OF 2017 ANNUAL MEETING OF STOCKHOLDERS AND PROXY STATEMENT

2. FISCAL YEAR 2016 ANNUAL REPORT ON FORM 10-K

3. STOCKHOLDER LETTER

How to View Online:

Go to http://proxymaterials.viacom.com to view these materials online.

How to Request and Receive a PAPER or E-MAIL Copy:

If you want to receive a paper or e-mail copy of these documents, you must request one. There is NO charge for requesting a copy. Please choose one of the following methods to make your request:

                                 1) BY INTERNET:        www.proxyvote.com

                                 2) BY TELEPHONE:    1-800-579-1639

                                 3) BY E-MAIL*:             sendmaterial@proxyvote.com

* If requesting materials by e-mail, please send a blank e-mail with the 16-Digit Control Number (located on the following page) in the subject line.

Requests, instructions and other inquiries sent to this e-mail address will NOT be forwarded to your investment advisor. Please make the request as instructed above on or before 01/23/17 to facilitate timely delivery.

Vote In Person: If you are a registered holder of Class A common stock, please mark the appropriate box on the proxy card, or indicate that you plan to attend the meeting when you vote by telephone or the Internet, and an admission ticket will be sent to you. If you hold shares of Class A common stock beneficially in a brokerage account or otherwise, you must obtain an admission ticket in advance by sending a written request along with proof of ownership (such as your brokerage firm account statement or statement of holdings from our transfer agent) to Director, Shareholder Relations, Viacom Inc., 1515 Broadway, 52nd Floor, New York, New York 10036-5794. Please bring photo identification with you for admittance to the meeting.

Vote By Internet: To vote now by Internet, go to www.proxyvote.com. Have the 16-Digit Control Number available and follow the instructions. Use the Internet to transmit your voting instructions up until 11:59 p.m., Eastern Standard Time, on February 5, 2017 (11:59 p.m., Eastern Standard Time, on February 2, 2017 for 401(k) plan participants).

Vote By Mail: You can vote by mail by requesting a paper copy of the materials, which will include a proxy card.

The Board recommends a vote FOR each of the

directors in item 1, FOR items 2, 4 and 5, and 3

YEARS on item 3.

1.    

The election of 10 directors:

Nominees:

— How to Access the Materials —

Proxy Materials Available to VIEW or RECEIVE:

1. NOTICE OF 2017 ANNUAL MEETING OF STOCKHOLDERS AND PROXY STATEMENT

2. FISCAL YEAR 2016 ANNUAL REPORT ON FORM 10-K

3. STOCKHOLDER LETTER

How to View Online:

Go to http://proxymaterials.viacom.com to view these materials online.

How to Request and Receive a PAPER or E-MAIL Copy:

If you want to receive a paper or e-mail copy of these materials, you must request one. There is NO charge for requesting a copy. Please choose one of the following methods to make your request:

                                 1) BY INTERNET:        www.proxyvote.com

                                 2) BY TELEPHONE:    1-800-579-1639

                                 3) BY E-MAIL*:             sendmaterial@proxyvote.com

* If requesting materials by e-mail, please send a blank e-mail with the 16-Digit Control Number (located on the following page) in the subject line.

Requests, instructions and other inquiries sent to this e-mail address will NOT be forwarded to your investment advisor. To facilitate timely delivery, please make the request as instructed above on or before 01/23/17.

01)  Robert M. Bakish

02)  Cristiana Falcone Sorrell

03)  Kenneth B. Lerer

04)  Thomas J. May

05)  Judith A. McHale

06)  Ronald L. Nelson

07)  Deborah Norville

08)  Charles E. Phillips, Jr.

09)  Shari Redstone

10)  Nicole Seligman