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
                                                                                  
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OMB Number: 3235-0287
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Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934 or Section 30(h) of the Investment Company Act of 1940
                      

1. Name and Address of Reporting Person *

Romano Ellen R. 		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)
SVP, Human Resources
(Last)          (First)          (Middle)

C/O ARMSTRONG WORLD INDUSTRIES, INC., 2500 COLUMBIA AVENUE 		3. Date of Earliest Transaction (MM/DD/YYYY)

11/22/2017
(Street)

LANCASTER, PA 17603
(City)        (State)        (Zip)
4. If Amendment, Date Original Filed (MM/DD/YYYY)

 
6. Individual or Joint/Group Filing (Check Applicable Line)

_ X _ Form filed by One Reporting Person
___ Form filed by More than One Reporting Person

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1.Title of Security
(Instr. 3) 		2. Trans. Date 2A. Deemed Execution Date, if any 3. Trans. 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
Common Stock   11/22/2017     M    2743   A $54.58   14769   D    
Common Stock   11/22/2017     M    3426   A $54.61   18195   D    
Common Stock   11/22/2017     M    3042   A $54.74   21237   D    
Common Stock   11/22/2017     M    9022   A $54.62   30259   D    
Common Stock   11/22/2017     M    10074   A $54.71   40333   D    
Common Stock   11/22/2017     S    33087   D $54.68   (1) 7246   D    

Table II - Derivative Securities Beneficially Owned ( e.g. , puts, calls, warrants, options, convertible securities)
1. Title of Derivate Security
(Instr. 3) 		2. Conversion or Exercise Price of Derivative Security 3. Trans. Date 3A. Deemed Execution Date, if any 4. Trans. 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 7. Title and Amount of Securities Underlying Derivative Security
(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
Employee Options - Right to Buy   $31.15   11/22/2017     M         2743      (2) 3/2/2021   Common Stock   2743   $0   0   D    
Stock Options (Right to Buy)   $37.83   11/22/2017     M         3426      (3) 2/28/2022   Common Stock   3426   $0   0   D    
Stock Options (Right to Buy)   $45.32   11/22/2017     M         3042      (4) 2/20/2023   Common Stock   3042   $0   0   D    
Stock Options (Right to Buy)   $43.31   11/22/2017     M         9022      (5) 7/30/2023   Common Stock   9022   $0   0   D    
Stock Options (Right to Buy)   $47.17   11/22/2017     M         10074      (6) 2/25/2024   Common Stock   10074   $0   0   D    

Explanation of Responses:
(1)  The sale price represents the weighted average price of the shares sold ranging from $54.55 to $54.93 per share. Upon request by the Commission staff, the Issuer or a security holder of the Issuer, the Reporting Person will provide full information regarding the number of shares sold at each separate price within the range set forth in this Form 4.
(2)  The options vest and become exercisable in three equal installments at the first, second and third anniversaries of the grant date (March 2, 2011), contingent upon the Reporting Person's employment on the scheduled vesting date.
(3)  The options vest and become exercisable in three equal installments at the first, second and third anniversaries of the grant date (February 28, 2012), contingent upon the Reporting Person's employment on the scheduled vesting date.
(4)  The options vest and become exercisable in three equal installments at the first, second and third anniversaries of the grant date (February 20, 2013), contingent upon the Reporting Person's employment on the scheduled vesting date.
(5)  The options vest and become exercisable in three equal installments at the first, second and third anniversaries of the grant date (July 30, 2013), contingent upon the Reporting Person's employment on the scheduled vesting date.
(6)  The options vest and become exercisable in three equal installments at the first, second and third anniversaries of the grant date (February 25, 2014), contingent upon the Reporting Person's employment on the scheduled vesting date.

Reporting Owners
Reporting Owner Name / Address
Relationships
Director 10% Owner Officer Other
Romano Ellen R.
C/O ARMSTRONG WORLD INDUSTRIES, INC.
2500 COLUMBIA AVENUE
LANCASTER, PA 17603

SVP, Human Resources

Signatures
/s/Bryan Y.M. Tham, Attorney-in-fact 11/22/2017
** Signature of Reporting Person Date


Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
* 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).
Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB control number.
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