Ownership Submission
FORM 4
Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).
UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP OF SECURITIES

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934, Section 17(a) of the Public Utility Holding Company Act of 1935 or Section 30(h) of the Investment Company Act of 1940
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(Print or Type Responses)
1. Name and Address of Reporting Person *
REDSTONE SUMNER M
   2. Issuer Name and Ticker or Trading Symbol
Viacom Inc. [VIA, VIAB] 		5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)
__X__ Director __X__ 10% Owner
__X__ Officer (give title below) _____ Other (specify below)
Chairman of the Board
(Last)
(First)
(Middle)
1515 BROADWAY		 3. Date of Earliest Transaction (Month/Day/Year)
01/13/2011
(Street)

NEW YORK, NY 10036		 4. If Amendment, Date Original Filed(Month/Day/Year)
 6. Individual or Joint/Group Filing(Check Applicable Line)
___ Form filed by One Reporting Person
_X_ Form filed by More than One Reporting Person
(City)
(State)
(Zip)
Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1.Title of Security
(Instr. 3)		 2. Transaction Date (Month/Day/Year) 2A. Deemed Execution Date, if any (Month/Day/Year) 3. Transaction Code
(Instr. 8)		 4. Securities Acquired (A) or Disposed of (D)
(Instr. 3, 4 and 5)		 5. Amount of Securities Beneficially Owned Following Reported Transaction(s)
(Instr. 3 and 4)		 6. Ownership Form: Direct (D) or Indirect (I)
(Instr. 4)		 7. Nature of Indirect Beneficial Ownership
(Instr. 4)
Code V Amount (A) or (D) Price
Class B Common Stock 01/13/2011   A   86,394 A (1) 87,690 D  
Class B Common Stock 01/13/2011   F(2)   41,277 D $ 41.27 46,413 D  
Class B Common Stock 01/05/2011   G V 319,500 D (3) 28,500 I By NAI (4)

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Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned
(e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security
(Instr. 3)		 2. Conversion or Exercise Price of Derivative Security 3. Transaction Date (Month/Day/Year) 3A. Deemed Execution Date, if any (Month/Day/Year) 4. Transaction Code
(Instr. 8)		 5. Number of Derivative Securities Acquired (A) or Disposed of (D)
(Instr. 3, 4, and 5)		 6. Date Exercisable and Expiration Date
(Month/Day/Year)		 7. Title and Amount of Underlying Securities
(Instr. 3 and 4)		 8. Price of Derivative Security
(Instr. 5)		 9. Number of Derivative Securities Beneficially Owned Following Reported Transaction(s)
(Instr. 4)		 10. Ownership Form of Derivative Security: Direct (D) or Indirect (I)
(Instr. 4)		 11. Nature of Indirect Beneficial Ownership
(Instr. 4)
Code V (A) (D) Date Exercisable Expiration Date Title Amount or Number of Shares

Reporting Owners

Reporting Owner Name / Address Relationships
 Director  10% Owner  Officer  Other
REDSTONE SUMNER M
1515 BROADWAY
NEW YORK, NY 10036		   X   X   Chairman of the Board  
NATIONAL AMUSEMENTS INC /MD/
846 UNIVERSITY AVENUE
NORWOOD, MA 02062-2631		   X   X    

Signatures

 /s/ Michael D. Fricklas, Attorney-in-Fact for Sumner M. Redstone   01/18/2011
**Signature of Reporting Person Date
 /s/ Tad Jankowski, Vice President   01/18/2011
**Signature of Reporting Person Date

Explanation of Responses:

* If the form is filed by more than one reporting person, see Instruction 4(b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations. See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
(1) Shares of the Issuer's Class B common stock were issued to the Reporting Person upon certification by the Compensation Committee of the Issuer's Board of Directors on January 13, 2011 of the vesting of previously granted Performance Share Units ("PSUs") based on the attainment of specified performance criteria for the period January 1, 2008 through December 31, 2010. The PSUs were granted to the Reporting Person for no consideration on January 1, 2008. On January 13, 2011, the closing price of the Issuer's Class B common stock on the New York Stock Exchange was $41.27 per share.
(2) Represents shares withheld pursuant to the terms of the Viacom Inc. 2006 Long-Term Management Incentive Plan, as amended and restated January 1, 2011 (the "LTMIP"), to satisfy tax liability incident to the vesting of, and delivery of shares underlying, the PSUs.
(3) Bona fide gift by the Reporting Person for no consideration.
(4) These securities are owned directly by National Amusements, Inc. (NAI) and may also be deemed to be beneficially owned by Sumner M. Redstone, who is the controlling stockholder of NAI.

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