12 unchanged sentences
under the Plans or
−Removed: January 1-31, 2026
−Removed: February 1-28, 2026
−Removed: March 1-31, 2026
+Added: April 1-30, 2026
+Added: May 1-31, 2026
+Added: June 1-30, 2026
(1) Includes shares reacquired through the withholding of shares to pay employee tax obligations upon the exercise of options or vesting of restricted shares previously granted under our long-term incentive plans.
−Removed: On July 29, 2016, our Board of Directors approved a share repurchase program authorizing us to repurchase up to $150.0 million of our outstanding shares of common stock (the “Program”).
+Added: On July 29, 2016, the Board of Directors of the Company approved a share repurchase program authorizing us to repurchase up to $150.0 million of our outstanding shares of common stock (the “Program”).
Since inception of the Program, this authorization has been increased to permit repurchases of up to an aggregate of $1,700.0 million of our outstanding shares of common stock through December 31, 2026.
+Added: On July 21, 2026, the Board of Directors of the Company approved an additional $800.0 million authorization under the Program, increasing the total authorized amount available for repurchases to $2,500.0 million, and extending the Program through December 31, 2029.
Repurchases of our common stock under the Program may be made through open market, block and privately negotiated transactions, including Rule 10b5-1 plans, at such times and in such amounts as management deems appropriate, subject to market and business conditions, regulatory requirements and other factors.
The Program does not obligate AWI to repurchase any particular amount of common stock and may be suspended or discontinued at any time without notice.
−Removed: During the three months ended March 31, 2026, we repurchased 0.3 million shares under the Program for a total cost of $60.0 million, excluding commissions and taxes, or an average price of $176.00 per share.
−Removed: Since inception through March 31, 2026, we have repurchased 15.7 million shares under the Program for a total cost of $1,227.2 million, excluding commissions and taxes, or an average price of $77.89 per share.
+Added: During the three months ended June 30, 2026, we repurchased 0.5 million shares under the Program for a total cost of $74.9 million, excluding commissions and taxes, or an average price of $163.20 per share.
+Added: During the six months ended June 30, 2026, we repurchased 0.8 million shares under the Program for a total cost of $134.9 million, excluding commissions and taxes, or an average price of $168.65 per share.
+Added: Since inception through June 30, 2026, we have repurchased 16.2 million shares under the Program for a total cost of $1,302.1 million, excluding commissions and taxes, or an average price of $80.31 per share.
DEFAULTS U PON SENIOR SECURITIES
3 unchanged sentences
Trading Arrangements of Directors and Executive Officers
−Removed: During the three months ended March 31, 2026 , no director or officer of the Company adopted or terminated a “Rule 10b5-1 trading arrangement” or “non-Rule 10b5-1 trading arrangement,” as each term is defined in Item 408(a) of Regulation S-K.
+Added: During the three months ended June 30, 2026 , no director or officer of the Company adopted or terminated a “Rule 10b5-1 trading arrangement” or “non-Rule 10b5-1 trading arrangement,” as each term is defined in Item 408(a) of Regulation S-K.
The following exhibits are filed as part of this Quarterly Report on Form 10-Q:
+Added: Armstrong World Industries, Inc.
+Added: 2026 Directors Stock Unit Plan, is incorporated by reference to Armstrong World Industries, Inc.’s Definitive Proxy Statement on Schedule 14A for the Armstrong World Industries, Inc.
+Added: 2026 Annual Meeting of Shareholders held on June 11, 2026 filed on April 30, 2026, wherein it appeared as Annex B*
Certification of Chief Executive Officer required by Rule 13a-14(a) or 15d-14(a) of the Securities Exchange Act.
6 unchanged sentences
Inline XBRL Taxonomy Extension Schema With Embedded Linkbase Documents.
−Removed: The cover page from the Company’s Quarterly Report on Form 10-Q for the quarter ended March 31, 2026 has been formatted in Inline XBRL.
+Added: The cover page from the Company’s Quarterly Report on Form 10-Q for the quarter ended June 30, 2026 has been formatted in Inline XBRL.
+Added: * Management Contract or Compensatory Plan
Filed herewith.
8 unchanged sentences
(Principal Accounting Officer)
−Removed: April 28, 2026
+Added: July 28, 2026
Compared sentence by sentence after normalising whitespace, quotation marks, case and digits, so re-formatting and restated figures do not read as changed language. Wording changes appear as one removal and one addition. The current filing and the prior one are authoritative.