MSA Safety officer granted 1,100-share stock award

MSA Safety Inc reported that Chief Accounting Officer Jonathan D. Buck received an award of 1,100 shares of common stock as a grant or other acquisition, not an open-market purchase.

Rhea-AI Filing Summary

MSA Safety Inc reported that Chief Accounting Officer Jonathan D. Buck received an award of 1,100 shares of common stock as a grant or other acquisition, not an open-market purchase. Following this award, he directly holds 4,791 shares of MSA Safety common stock.

The Form 4/A is an amendment that corrects the number of shares previously reported as awarded under performance stock units due to an administrative error, and it also updates the reported number of shares beneficially owned after the transaction.

Insider Trade Summary

Grant/Award: 1,100 shares

Grant/Award 1 txn

Insider Buck Jonathan D.

Role Chief Accounting Officer

Type	Security	Shares	Price	Value
Grant/Award	Common Stock, no par value	1,100	$0.00	$0.00

Holdings After Transaction: Common Stock, no par value — 4,791 shares (Direct)

Footnotes (1)

1. F1. This amendment is filed to amend the number of shares reported as awarded under performance stock units in the original Form 4, which amount was incorrect due to administrative error, and is deemed to amend the number of shares reported as securities beneficially owned following the reported transactions in Table I to reflect the correction.

FAQ

What insider transaction did MSA Safety (MSA) report in this Form 4/A?

MSA Safety reported that Chief Accounting Officer Jonathan D. Buck received a grant of 1,100 shares of common stock. This was recorded as an award or other acquisition, not an open-market trade, and reflects routine equity-based compensation.

Why was this MSA Safety (MSA) Form 4/A filed as an amendment?

The Form 4/A was filed to correct the number of shares previously reported as awarded under performance stock units. The company noted the original amount was wrong due to an administrative error and adjusted the reported beneficial ownership accordingly.

How many MSA Safety (MSA) shares does Jonathan D. Buck own after this transaction?

After the reported award, Jonathan D. Buck beneficially owns 4,791 shares of MSA Safety common stock directly. This figure reflects the corrected share award and updates the total shares held following the amended transaction.

Was the 1,100-share change for MSA Safety (MSA) an open-market purchase or sale?

No, the 1,100-share change was not an open-market trade. It is classified as a grant, award, or other acquisition with a transaction price of $0.00 per share, indicating equity compensation rather than a market purchase or sale.

What role does Jonathan D. Buck hold at MSA Safety (MSA) in this filing?

In this filing, Jonathan D. Buck is identified as an officer of MSA Safety Inc, serving as Chief Accounting Officer. The reported stock award reflects part of his compensation structure rather than independent investment activity in the open market.

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Accepted by SEC EDGAR 03/10/2026 - 03:34 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^*

Buck Jonathan D.

(Last) (First) (Middle)

1000 CRANBERRY WOODS DRIVE

(Street)

CRANBERRY WOODS TOWNSHIP PA 16066

(City) (State) (Zip)

2. Issuer Name and Ticker or Trading Symbol
MSA Safety Inc [ MSA ]

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

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

3. Date of Earliest Transaction (Month/Day/Year)
03/08/2026

4. If Amendment, Date of Original Filed (Month/Day/Year)
03/10/2026

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

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

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, no par value	03/08/2026		A		1,100(1)	A	$0.0000	4,791	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. This amendment is filed to amend the number of shares reported as awarded under performance stock units in the original Form 4, which amount was incorrect due to administrative error, and is deemed to amend the number of shares reported as securities beneficially owned following the reported transactions in Table I to reflect the correction.

	Richard W. Roda, Attorney in Fact	03/10/2026
	** 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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