Armstrong World Industries (NYSE: AWI) director receives 876 restricted stock units

Rhea-AI Filing Summary

Osborne William H reported acquisition or exercise transactions in this Form 4 filing.

Armstrong World Industries director William H. Osborne received an equity grant as part of his annual board compensation. On June 12, 2026, he was awarded 876 restricted stock units with no cash paid per unit. The grant represents the equity portion of his retainer under the company’s nonemployee Director Compensation Program and was valued using the closing common share price of $154.21 on the grant date under accounting rule ASC 718. Following this grant, Osborne holds 4,817 restricted stock units in total, including vested and unvested units and some that are not yet acquirable until a future vesting or service-termination date, consistent with the 2016 Directors Stock Unit Plan.

Insights

Equity Compensation Analyst

Routine equity retainer grant, no open-market trading signal.

Director William H. Osborne received 876 restricted stock units as the equity portion of his board retainer. The units were granted at no cash cost to him and valued using the $154.21 closing share price under accounting standard ASC 718.

The award vests based on continued board service and specific triggers under the 2016 Directors Stock Unit Plan, including the next annual shareholders meeting, death, disability, or a qualifying Change in Control. Units become acquirable only at vesting or upon service termination, at the director’s election.

This Form 4 reflects routine nonemployee director compensation rather than discretionary buying or selling. There were no open-market trades, and Osborne’s holdings increase to 4,817 units, indicating a modest, compensation-driven expansion of his equity exposure in Armstrong World Industries.

Insider Trade Summary

1 transaction reported

Mixed 1 txn

Insider Osborne William H

Role null

Type	Security	Shares	Price	Value
Grant/Award	Common Stock	876	$0.00	--

Holdings After Transaction: Common Stock — 4,817 shares (Direct, null)

Footnotes (1)

1. Restricted stock units granted under the 2016 Directors Stock Unit Plan (the "2016 Plan"), and as part of the Issuer's nonemployee Director Compensation Program. The units vest (contingent upon the Director's continued service as of such date) on the earlier of (i) the date of the next annual shareholders meeting following the grant; (ii) the death or total and permanent disability of the Director; or (iii) the date of any Change in Control (as defined in the 2016 Plan). Vested units will be acquirable by the Director, at the election of the Director: (i) at the vesting of the units on the date of the next annual shareholders meeting following the grant or (ii) at the time of the Director's termination of service. Represents an annual grant of restricted stock units as the equity portion of the Director's retainer for Board service under the Issuer's nonemployee Director Compensation Program. The grant date fair value of the units is calculated under the Financial Accounting Standards Board's Accounting Standards Codification Topic 718 using the closing stock price of the Issuer's common shares on June 12, 2026, which price was $154.21. Includes vested and unvested units as well as units not yet acquirable by the Director. Under the terms of the 2016 Plan, vested units under the 2016 Plan are not acquirable by the Director until, at the election of the Director: (i) the vesting of the units on the date of the next annual shareholders meeting following the grant or (ii) the time of the Director's termination of service.

Key Figures

RSU grant size: 876 units Grant price reference: $154.21 per share Total units after grant: 4,817 units +1 more

4 metrics

RSU grant size 876 units Restricted stock units granted on June 12, 2026

Grant price reference $154.21 per share Closing common share price used for ASC 718 fair value on June 12, 2026

Total units after grant 4,817 units Restricted stock units held following the reported transaction

Cash paid per unit $0.00 Director received RSU grant at no cash cost

Key Terms

restricted stock units, 2016 Directors Stock Unit Plan, nonemployee Director Compensation Program, Change in Control, +1 more

5 terms

restricted stock units financial

"Restricted stock units granted under the 2016 Directors Stock Unit Plan (the "2016 Plan")"

Restricted stock units are a type of company reward where employees are promised shares of stock, but they only fully own these shares after meeting certain conditions, like staying with the company for a set time. They matter because they can become valuable assets and are often used to motivate employees to help the company succeed.

2016 Directors Stock Unit Plan financial

"Restricted stock units granted under the 2016 Directors Stock Unit Plan (the "2016 Plan")"

nonemployee Director Compensation Program financial

"as part of the Issuer's nonemployee Director Compensation Program"

Change in Control financial

"the date of any Change in Control (as defined in the 2016 Plan)"

A "change in control" occurs when the ownership or management of a company shifts significantly, such as through a merger, acquisition, or sale of a large part of its assets. This change can impact how the company is run and may influence its future direction. For investors, it matters because it can affect the company's stability, strategy, and value, often signaling potential changes in investment risk or opportunity.

Accounting Standards Codification Topic 718 financial

"calculated under the Financial Accounting Standards Board's Accounting Standards Codification Topic 718"

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Form 4 Insider Transactions: What Each Field Means →

SEC Form 4

FORM 4

UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934
or Section 30(h) of the Investment Company Act of 1940

OMB APPROVAL

OMB Number:			3235-0287
Estimated average burden
hours per response:			0.5

Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

Check this box to indicate that a transaction was made pursuant to a contract, instruction or written plan for the purchase or sale of equity securities of the issuer that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c). See Instruction 10.

1. Name and Address of Reporting Person^*

Osborne William H

(Last) (First) (Middle)

C/O ARMSTRONG WORLD INDUSTRIES, INC.

2500 COLUMBIA AVENUE

(Street)

LANCASTER PENNSYLVANIA 17603

(City) (State) (Zip)

UNITED STATES

(Country)

2. Issuer Name and Ticker or Trading Symbol
ARMSTRONG WORLD INDUSTRIES INC [ AWI ]

5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)

X	Director		10% Owner
	Officer (give title below)		Other (specify below)

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
06/12/2026

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

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

4. If Amendment, Date of Original Filed (Month/Day/Year)

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
Common Stock(1)	06/12/2026		A		876(2)	A	$0	4,817(3)	D

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 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: 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

Explanation of Responses:

1. Restricted stock units granted under the 2016 Directors Stock Unit Plan (the "2016 Plan"), and as part of the Issuer's nonemployee Director Compensation Program. The units vest (contingent upon the Director's continued service as of such date) on the earlier of (i) the date of the next annual shareholders meeting following the grant; (ii) the death or total and permanent disability of the Director; or (iii) the date of any Change in Control (as defined in the 2016 Plan). Vested units will be acquirable by the Director, at the election of the Director: (i) at the vesting of the units on the date of the next annual shareholders meeting following the grant or (ii) at the time of the Director's termination of service.

2. Represents an annual grant of restricted stock units as the equity portion of the Director's retainer for Board service under the Issuer's nonemployee Director Compensation Program. The grant date fair value of the units is calculated under the Financial Accounting Standards Board's Accounting Standards Codification Topic 718 using the closing stock price of the Issuer's common shares on June 12, 2026, which price was $154.21.

3. Includes vested and unvested units as well as units not yet acquirable by the Director. Under the terms of the 2016 Plan, vested units under the 2016 Plan are not acquirable by the Director until, at the election of the Director: (i) the vesting of the units on the date of the next annual shareholders meeting following the grant or (ii) the time of the Director's termination of service.

Remarks:

See Exhibit 24 - Power of Attorney

	/s/ Alan M. Kidd, Attorney-in-fact	06/15/2026
	** 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 Number.
* Form 4: SEC 1474 (03-26)

FAQ

What did AWI director William H. Osborne report in this Form 4?

William H. Osborne reported receiving 876 restricted stock units of Armstrong World Industries as part of his annual board retainer. The grant is equity compensation, not an open-market stock purchase or sale, and increases his total restricted stock unit holdings to 4,817.

Was the AWI Form 4 transaction a buy or sell of common stock?

The transaction was an acquisition through a grant, not a market buy or sell. Osborne received 876 restricted stock units at no cash cost as board compensation, so the filing does not show him purchasing or selling AWI shares in the open market.

How were William H. Osborne’s AWI restricted stock units valued?

The restricted stock units were valued using Armstrong World Industries’ closing common share price of $154.21 on June 12, 2026. That price is applied under Financial Accounting Standards Board ASC 718 to determine the grant-date fair value for accounting and compensation reporting purposes.

How many AWI restricted stock units does Osborne hold after this grant?

After the June 12, 2026 grant, Osborne holds 4,817 restricted stock units tied to Armstrong World Industries. This total includes vested and unvested units, as well as units that are not yet acquirable until a future vesting date or his termination of board service.

When do William H. Osborne’s AWI restricted stock units vest and become acquirable?

The units vest on the earlier of the next annual shareholders meeting, Osborne’s death or total and permanent disability, or a qualifying Change in Control. Once vested, they become acquirable either at that next annual meeting or upon his termination of service, at his election.