MSA Safety Inc

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

SCHEDULE 14A

Proxy Statement Pursuant to Section 14(a)

of the Securities Exchange Act of 1934

(Amendment No. )

Filed by the Registrant ☒

Filed by a Party other than the Registrant ☐

Check the appropriate box:

MSA Safety Incorporated

(Name of Registrant as Specified In Its Charter)

Payment of Filing Fee (Check all boxes that apply):

Notice of Annual Meeting of Shareholders

TO THE HOLDERS OF COMMON STOCK OF MSA SAFETY INCORPORATED:

Notice is hereby given that the Annual Meeting of Shareholders of MSA Safety Incorporated will be held on Tuesday, May 13, 2025 at 9:00 a.m., Eastern Time, via a live audio webcast only at www.virtualshareholdermeeting.com/MSA2025 for the purpose of considering and acting upon the following:

and such other business as may properly come before the Annual Meeting or any adjournment thereof.

Only the holders of record of Common Stock of the Company on the books of the Company at the close of business on February 14, 2025 are entitled to notice of and to vote at the meeting and any adjournment thereof.

Notice of Internet Availability of Proxy Materials: Instead of mailing printed proxy materials in 2025, on March 31, 2025 we mailed a Notice of Internet Availability of Proxy Materials advising shareholders to view our Proxy Statement, Proxy Card and 2024 Annual Report free of charge online at www.proxyvote.com, or to request paper or email copies. Only shareholders who have requested printed materials will receive them. We encourage all shareholders to access the Company’s proxy materials online to reduce the environmental impact and costs associated with paper copies.

You are cordially invited to attend the meeting. Whether or not you expect to attend the meeting, please vote by promptly submitting your proxy by mail, by the internet or by phone. If you attend the meeting, you may, if you wish, withdraw your proxy and vote your shares during the meeting.

By Order of the Board of Directors,

Richard W. Roda Secretary

March 31, 2025

IMPORTANT NOTE ABOUT

THE 2025 ANNUAL MEETING

The MSA Annual Meeting of Shareholders will be held in a virtual-only format in 2025. Shareholders must use the following link to access the virtual meeting on the meeting date:

www.virtualshareholdermeeting.com/MSA2025

Upon accessing the link, shareholders must enter the 12-digit control number found on their proxy card, voting instruction form or notice of internet availability of proxy materials; otherwise, admittance to the meeting will not be approved.

It is not necessary to attend the meeting to vote your shares. To vote your proxy by mail, mark your vote on the proxy card and follow the mailing directions on the card. To vote your proxy by telephone or electronically using a smartphone, tablet or the internet, follow the instructions on the proxy card. If you received a notice of internet availability of proxy materials, you may vote by following the instructions contained in the notice. The proxy holders will vote your shares according to your directions. If you sign and return your proxy card but do not mark any selections, your shares represented by that proxy will be voted as recommended by the Board. Whether or not you expect to attend the virtual meeting, we encourage you to vote by proxy as soon as possible, should you later decide not to attend the meeting.

MSA 2025 PROXY STATEMENT