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 *
McNamara Stephen F
   2. Issuer Name and Ticker or Trading Symbol
ARMSTRONG WORLD INDUSTRIES INC [AWI] 		5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)
_____ Director _____ 10% Owner
__X__ Officer (give title below) _____ Other (specify below)
Vice President and Controller
(Last)
(First)
(Middle)
C/O ARMSTRONG WORLD INDUSTRIES, INC., 2500 COLUMBIA AVENUE		 3. Date of Earliest Transaction (Month/Day/Year)
12/17/2010
(Street)

LANCASTER, PA 17603		 4. If Amendment, Date Original Filed(Month/Day/Year)
 6. Individual or Joint/Group Filing(Check Applicable Line)
_X_ Form filed by One Reporting Person
___ 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

Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
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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
Stock Option $ 29.37 12/17/2010   D(1)     2,628 10/02/2008 10/02/2016 Common Stock 2,628 (1) 0 D  
Stock Option $ 22.55 12/17/2010   A(1)   3,422   10/02/2008 10/02/2016 Common Stock 3,422 (1) 3,422 D  
Stock Option $ 29.37 12/17/2010   D(1)     2,629 08/28/2009 08/28/2014 Common Stock 2,629 (1) 0 D  
Stock Option $ 22.55 12/17/2010   A(1)   3,423   08/28/2009 08/28/2014 Common Stock 3,423 (1) 3,423 D  
Stock Option $ 29.37 12/17/2010   D(1)     2,629 08/28/2009 08/28/2014 Common Stock 2,629 (1) 0 D  
Stock Option $ 22.55 12/17/2010   A(1)   3,423   08/28/2009 08/28/2014 Common Stock 3,423 (1) 3,423 D  
Stock Option $ 13.46 12/17/2010   D(1)     9,798 08/28/2009 08/28/2014 Common Stock 9,798 (1) 0 D  
Stock Option $ 10.34 12/17/2010   A(1)   12,761   08/28/2009 08/28/2014 Common Stock 12,761 (1) 12,761 D  
Stock Option $ 38.06 12/17/2010   D(1)     1,494 04/01/2011 04/01/2020 Common Stock 1,494 (1) 0 D  
Common Stock $ 29.23 12/17/2010   A(1)   1,946   04/01/2011 04/01/2020 Common Stock 1,946 (1) 1,946 D  
Stock Option $ 38.06 12/17/2010   D(1)     1,495 04/01/2012 04/01/2020 Common Stock 1,495 (1) 0 D  
Stock Option $ 29.23 12/17/2010   A(1)   1,947   04/01/2012 04/01/2020 Common Stock 1,947 (1) 1,947 D  
Stock Option $ 38.06 12/17/2010   D(1)     1,495 04/01/2013 04/01/2020 Common Stock 1,495 (1) 0 D  
Stock Option $ 29.23 12/17/2010   A(1)   1,947   04/01/2013 04/01/2020 Common Stock 1,947 (1) 1,947 D  

Reporting Owners

Reporting Owner Name / Address Relationships
 Director  10% Owner  Officer  Other
McNamara Stephen F
C/O ARMSTRONG WORLD INDUSTRIES, INC.
2500 COLUMBIA AVENUE
LANCASTER, PA 17603		       Vice President and Controller  

Signatures

 /s/ Robert J. Sandkuhler, attorney-in-fact   12/21/2010
**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) The reported transactions involved an amendment of outstanding options due to the recapitalization of the Company, resulting in the deemed cancellation of the "old" options and the grant of replacement options.

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