Armstrong World COO awarded 7,666 RSUs

Hershey Mark A reported acquisition or exercise transactions in this Form 4 filing.

Rhea-AI Filing Summary

Hershey Mark A reported acquisition or exercise transactions in this Form 4 filing.

Armstrong World Industries reported that its SVP & Chief Operating Officer, Mark A. Hershey, received a grant of 7,666 restricted stock units on February 25, 2026. Each unit represents the right to receive one share of common stock under the company’s 2022 Equity and Cash Incentive Plan.

The restricted stock units will vest in full on February 25, 2029, contingent on Hershey’s continued employment with the company through that date, subject to the plan’s terms. This is a non-cash, equity-based compensation award that aligns the executive’s interests with long-term company performance.

Insider Trade Summary

Grant/Award: 7,666 shares

Grant/Award 1 txn

Insider Hershey Mark A

Role SVP & Chief Operating Officer

Type	Security	Shares	Price	Value
Grant/Award	Restricted Stock Units	7,666	$172.21	$1.32M

Holdings After Transaction: Restricted Stock Units — 7,666 contracts (Direct)

Footnotes (2)

1. F1. Each restricted stock unit represents a contingent right to receive one share of the Issuer's common stock under the Issuer's 2022 Equity and Cash Incentive Plan.
2. F2. The restricted stock units were granted to the Reporting Person on February 25, 2026 and will vest in full on February 25, 2029 (contingent upon the Reporting Person's employment with the Issuer on the scheduled vesting date, except as provided for under the Issuer's 2022 Equity and Cash Incentive Plan).

FAQ

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What did Armstrong World Industries (AWI) disclose in this Form 4 filing?

Armstrong World Industries disclosed that SVP & Chief Operating Officer Mark A. Hershey received a grant of 7,666 restricted stock units on February 25, 2026. These units are awarded under the company’s 2022 Equity and Cash Incentive Plan and represent equity-based executive compensation.

How many restricted stock units were granted to Mark A. Hershey at AWI?

Mark A. Hershey was granted 7,666 restricted stock units. Each unit represents a contingent right to receive one share of Armstrong World Industries common stock under the 2022 Equity and Cash Incentive Plan, providing long-term, stock-based compensation tied to the company’s future performance.

When do the newly granted AWI restricted stock units vest for Mark A. Hershey?

The 7,666 restricted stock units granted to Mark A. Hershey vest in full on February 25, 2029. Vesting is contingent on his continued employment with Armstrong World Industries through that date, subject to the terms of the 2022 Equity and Cash Incentive Plan.

What does each AWI restricted stock unit granted to Mark A. Hershey represent?

Each restricted stock unit represents a contingent right to receive one share of Armstrong World Industries common stock. The award is granted under the 2022 Equity and Cash Incentive Plan, making it a form of stock-based compensation rather than an immediate cash payment.

Under which plan were the AWI restricted stock units granted to Mark A. Hershey?

The 7,666 restricted stock units granted to Mark A. Hershey were issued under Armstrong World Industries’ 2022 Equity and Cash Incentive Plan. This plan governs the terms of stock-based awards, including vesting conditions and treatment of grants for key executives.

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Accepted by SEC EDGAR 02/26/2026 - 04:45 PM Learn about SEC filing dates

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^*

Hershey Mark A

(Last) (First) (Middle)

C/O ARMSTRONG WORLD INDUSTRIES, INC.

2500 COLUMBIA AVENUE

(Street)

LANCASTER PA 17603

(City) (State) (Zip)

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 & Chief Operating Officer

3. Date of Earliest Transaction (Month/Day/Year)
02/25/2026

4. If Amendment, Date of 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

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

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
Restricted Stock Units(1)	(1)	02/25/2026		A		7,666		(2)	(2)	Common Stock	7,666	$172.21	7,666	D

Explanation of Responses:

1. Each restricted stock unit represents a contingent right to receive one share of the Issuer's common stock under the Issuer's 2022 Equity and Cash Incentive Plan.

2. The restricted stock units were granted to the Reporting Person on February 25, 2026 and will vest in full on February 25, 2029 (contingent upon the Reporting Person's employment with the Issuer on the scheduled vesting date, except as provided for under the Issuer's 2022 Equity and Cash Incentive Plan).

	/s/ Alan M. Kidd, Attorney-in-fact	02/26/2026
	** 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.
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