MSA / MSA Safety Incorporated - Depositi SEC, Relazione annuale, dichiarazione di delega

Conflict Minerals Report of MSA Safety Incorporated For The Year ended December 31, 2025

EXHIBIT 1.01 Conflict Minerals Report of MSA Safety Incorporated For The Year ended December 31, 2025 I. Introduction This is the Conflict Minerals Report (the "Report") of MSA Safety Incorporated ("MSA", the "company", "we", "us", or "our") for the calendar year ended December 31, 2025. The company has prepared this Report to comply with Rule 13p-1 under the Securities Exchange Act of 1934, as am

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM SD SPECIALIZED DISCLOSURE REPORT MSA Safety Incorporated (Exact name of the registrant as specified in its charter) Pennsylvania 1-15579 46-4914539 (State or other jurisdict

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM SD SPECIALIZED DISCLOSURE REPORT MSA Safety Incorporated (Exact name of the registrant as specified in its charter) Pennsylvania 1-15579 46-4914539 (State or other jurisdiction of incorporation or organization) (Commission File Number) (IRS Employer Identification No.) 1000 Cranberry Woods Drive Cranberry Township, Pennsy

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): May 8, 2026 MSA SAFETY INCORPORAT

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): May 8, 2026 MSA SAFETY INCORPORATED (Exact name of registrant as specified in its charter) Pennsylvania 1-15579 46-4914539 (State or other jurisdiction of incorporation or organizatio

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of The Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): May 5, 2026 MSA SAFETY INCORPORAT

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of The Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): May 5, 2026 MSA SAFETY INCORPORATED (Exact name of registrant as specified in its charter) Pennsylvania 1-15579 46-4914539 (State or other jurisdiction of incorporation) (Commission F

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q ☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarter ended March 31, 2026 ☐ TRANSITION REPORT PURSUANT TO SECTION 1

Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q ☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarter ended March 31, 2026 or ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Commission File No. 1-15579 MSA SAFETY INCORPORATED (Exact name of registrant a

Date: May 5, 2026 SALE AND PURCHASE AGREEMENT THE SELLER THE PURCHASER THE PURCHASER’S PARENT THE SELLER’S PARENT relating to AUTRONICA BUYER NORWAY AS Table of Contents

Exhibit 2.1 Certain information identified with a [***] has been excluded from this exhibit because it is both not material and is the type that the registrant treats as private or confidential. Execution Version Date: May 5, 2026 SALE AND PURCHASE AGREEMENT between THE SELLER and THE PURCHASER and THE PURCHASER’S PARENT and THE SELLER’S PARENT relating to AUTRONICA BUYER NORWAY AS Table of Conten

FOR IMMEDIATE RELEASE FROM: MSA (MSA Safety Incorporated) Ticker: MSA (NYSE) Media Relations Contact: Mark Deasy – (412) 559-8154 Investor Relations Contact: Larry De Maria – (917) 245-7463 MSA Safety to Acquire Autronica Fire and Security, a Leading

Exhibit 99.1 FOR IMMEDIATE RELEASE FROM: MSA (MSA Safety Incorporated) Ticker: MSA (NYSE) Media Relations Contact: Mark Deasy – (412) 559-8154 Investor Relations Contact: Larry De Maria – (917) 245-7463 MSA Safety to Acquire Autronica Fire and Security, a Leading Provider of Fire and Gas Detection and Alarm Systems • Acquisition expands MSA’s global fire and gas detection capabilities, strengtheni

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EXHIBIT 99.1 FOR IMMEDIATE RELEASE FROM: MSA Safety Incorporated Ticker: MSA (NYSE) Media Relations Contact: Mark Deasy (412) 559-8154 Investor Relations Contact: Larry De Maria (917) 245-7463 MSA Safety Announces First Quarter 2026 Results First Quarter 2026 Highlights •Achieved quarterly net sales of $464 million, a 10% GAAP increase and a 3% organic increase year-over-year •Generated GAAP opera

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): May 4, 2026 MSA SAFETY INCORPORAT

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): May 4, 2026 MSA SAFETY INCORPORATED (Exact name of registrant as specified in its charter) Pennsylvania 1-15579 46-4914539 (State or other jurisdiction of incorporation or organizatio

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TECHNOLOGY & TRUST Annual Report 2025 7101CVRC2.indd 1         ɐ3 0Net Sales BY SEGMENT Americas International 67% 33% $1.9B 25% 34% 41% BY PRODUCT CATEGORY Detection Fire Service Industrial PPE and Other $1.9B Business of MSA Safety MSA Safety is the global leader in advanced safety products, technologies and solutions that help protect people and facility infrastructures throughout

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.   )

DEFA14A 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: ☐ Preliminary Proxy Statement ☐ Confidential, for Use of the Commission Only (as permitted by Rule 14a-6(e)(2

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.   )

Table of Contents 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: ☐ Preliminary Proxy Statement ☐ Confidential, for Use of the Commission Only (as permitted by Rule

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): February 26, 2026 (February 20, 2

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): February 26, 2026 (February 20, 2026) MSA SAFETY INCORPORATED (Exact name of registrant as specified in its charter) Pennsylvania 1-15579 46-4914539 (State or other jurisdiction of in

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EXHIBIT 99.1 FOR IMMEDIATE RELEASE FROM: MSA Safety Incorporated Ticker: MSA (NYSE) Media Relations Contact: Mark Deasy (412) 559-8154 Investor Relations Contact: Larry De Maria – (917) 245-7463 MSA Safety Announces Share Repurchase Program PITTSBURGH, February 26, 2026 – MSA Safety Incorporated (NYSE: MSA) announced that on February 20, 2026, its Board of Directors authorized a new share repurcha

Execution Version 4859-4385-1968 v7 AMENDMENT NO. 3 TO THIRD AMENDED AND RESTATED MULTI-CURRENCY NOTE PURCHASE AND PRIVATE SHELF AGREEMENT THIS AMENDMENT NO. 3 TO THIRD AMENDED AND RESTATED MULTICURRENCY NOTE PURCHASE AND PRIVATE SHELF AGREEMENT (thi

ex10uamendno3to3rdamende Execution Version 4859-4385-1968 v7 AMENDMENT NO. 3 TO THIRD AMENDED AND RESTATED MULTI-CURRENCY NOTE PURCHASE AND PRIVATE SHELF AGREEMENT THIS AMENDMENT NO. 3 TO THIRD AMENDED AND RESTATED MULTICURRENCY NOTE PURCHASE AND PRIVATE SHELF AGREEMENT (this “Amendment”) is dated as of July 1, 2024 (the “Effective Date”) and is made by and among MSA SAFETY INCORPORATED, a Pennsyl

Execution Version AMENDMENT NO. 2 TO SECOND AMENDED AND RESTATED MASTER NOTE FACILITY THIS AMENDMENT NO. 2 TO SECOND AMENDED AND RESTATED MASTER NOTE FACILITY (this “Amendment”) is dated as of June 29, 2023 (the “Effective Date”) and is made by and a

ex10xamendno2to2ndamende Execution Version AMENDMENT NO. 2 TO SECOND AMENDED AND RESTATED MASTER NOTE FACILITY THIS AMENDMENT NO. 2 TO SECOND AMENDED AND RESTATED MASTER NOTE FACILITY (this “Amendment”) is dated as of June 29, 2023 (the “Effective Date”) and is made by and among MSA SAFETY INCORPORATED, a Pennsylvania corporation (the “Company”), each Guarantor party hereto, NYL INVESTORS LLC (“Ne

Execution Version AMENDMENT NO. 3 TO SECOND AMENDED AND RESTATED MASTER NOTE FACILITY THIS AMENDMENT NO. 3 TO SECOND AMENDED AND RESTATED MASTER NOTE FACILITY (this “Amendment”) is dated as of July 1, 2024 (the “Effective Date”) and is made by and am

ex10yamendno3to2ndamende Execution Version AMENDMENT NO. 3 TO SECOND AMENDED AND RESTATED MASTER NOTE FACILITY THIS AMENDMENT NO. 3 TO SECOND AMENDED AND RESTATED MASTER NOTE FACILITY (this “Amendment”) is dated as of July 1, 2024 (the “Effective Date”) and is made by and among MSA SAFETY INCORPORATED, a Pennsylvania corporation (the “Company”), each Guarantor party hereto, NYL INVESTORS LLC (“New

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-K ☒ ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the fiscal year ended December 31, 2025

Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-K ☒ ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the fiscal year ended December 31, 2025 OR ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 FOR THE TRANSITION PERIOD FROM TO Commission File No. 1-15579 MSA SAFETY IN

Execution Version AMENDMENT NO. 2 TO THIRD AMENDED AND RESTATED MULTI-CURRENCY NOTE PURCHASE AND PRIVATE SHELF AGREEMENT THIS AMENDMENT NO. 2 TO THIRD AMENDED AND RESTATED MULTICURRENCY NOTE PURCHASE AND PRIVATE SHELF AGREEMENT (this “Amendment”) is

ex10tamendno2to3rdamende Execution Version AMENDMENT NO. 2 TO THIRD AMENDED AND RESTATED MULTI-CURRENCY NOTE PURCHASE AND PRIVATE SHELF AGREEMENT THIS AMENDMENT NO. 2 TO THIRD AMENDED AND RESTATED MULTICURRENCY NOTE PURCHASE AND PRIVATE SHELF AGREEMENT (this “Amendment”) is dated as of June 29, 2023 (the “Effective Date”) and is made by and among MSA SAFETY INCORPORATED, a Pennsylvania corporation

MSA SAFETY INCORPORATED SUBSIDIARIES OF THE REGISTRANT DECEMBER 31, 2025

EXHIBIT 21 MSA SAFETY INCORPORATED SUBSIDIARIES OF THE REGISTRANT DECEMBER 31, 2025 Name State or Other Jurisdiction of Incorporation Bacharach Holding Corp.

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): December 23, 2025 MSA SAFETY INCO

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): December 23, 2025 MSA SAFETY INCORPORATED (Exact name of registrant as specified in its charter) Pennsylvania 1-15579 46-4914539 (State or other jurisdiction of incorporation or organ

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q ☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarter ended September 30, 2025 ☐ TRANSITION REPORT PURSUANT TO SECTI

Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q ☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarter ended September 30, 2025 or ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Commission File No. 1-15579 MSA SAFETY INCORPORATED (Exact name of registra

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EXHIBIT 99.1 FOR IMMEDIATE RELEASE FROM: MSA Safety Incorporated Ticker: MSA (NYSE) Media Relations Contact: Mark Deasy (412) 559-8154 Investor Relations Contact: Larry De Maria (917) 245-7463 MSA Safety Announces Third Quarter 2025 Results Third Quarter 2025 Highlights •Achieved quarterly net sales of $468 million, an 8% GAAP increase and a 3% organic increase year-over-year •Generated GAAP opera

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): October 28, 2025 MSA SAFETY INCOR

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): October 28, 2025 MSA SAFETY INCORPORATED (Exact name of registrant as specified in its charter) Pennsylvania 1-15579 46-4914539 (State or other jurisdiction of incorporation or organi

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144 0001798883 XXXXXXXX LIVE 0000066570 MSA Safety Inc 001-15579 1000 CRANBERRY WOODS DRIVE CRANBERRY TOWNSHIP PA 16066 724-776-8600 Sciullo Stephanie L Officer Common Raymond James & Associates 880 Carillon Parkway St.

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144 0001798883 XXXXXXXX LIVE 0000066570 MSA Safety Inc 001-15579 1000 CRANBERRY WOODS DRIVE CRANBERRY TOWNSHIP PA 16066 724-776-8600 Sciullo Stephanie L Officer Common Fidelity Brokerage Services LLC 900 Salem Street Smithfield RI 02917 5000 861879.

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144 0002063340 XXXXXXXX LIVE 0000066570 MSA Safety Inc 001-15579 1000 CRANBERRY WOODS DRIVE CRANBERRY TOWNSHIP PA 16066 724-776-8600 Brody Elyse L Officer Common Fidelity Brokerage Services LLC 900 Salem Street Smithfield RI 02917 1034 178154.

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): August 13, 2025 (August 13, 2025)

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): August 13, 2025 (August 13, 2025) MSA SAFETY INCORPORATED (Exact name of registrant as specified in its charter) Pennsylvania 1-15579 46-4914539 (State or other jurisdiction of incorp

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EXHIBIT 99.1 FOR IMMEDIATE RELEASE FROM: MSA Safety Incorporated Ticker: MSA (NYSE) Media Relations Contact: Mark Deasy (412) 559-8154 Investor Relations Contact: Larry De Maria – (917) 245-7463 MSA Safety Names Julie A. Beck Senior Vice President, Chief Financial Officer and Treasurer PITTSBURGH, August 13, 2025 – MSA Safety Incorporated (NYSE: MSA), a global leader in the development of advanced

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q ☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarter ended June 30, 2025 ☐ TRANSITION REPORT PURSUANT TO SECTION 13

Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q ☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarter ended June 30, 2025 or ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Commission File No. 1-15579 MSA SAFETY INCORPORATED (Exact name of registrant as

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EXHIBIT 99.1 FOR IMMEDIATE RELEASE FROM: MSA Safety Incorporated Ticker: MSA (NYSE) Media Relations Contact: Mark Deasy (412) 559-8154 Investor Relations Contact: Larry De Maria (917) 245-7463 MSA Safety Announces Second Quarter 2025 Results Second Quarter 2025 Highlights •Achieved quarterly net sales of $474 million, a 3% GAAP increase and flat organic(a) year-over-year •Generated GAAP operating

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): August 4, 2025 MSA SAFETY INCORPO

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): August 4, 2025 MSA SAFETY INCORPORATED (Exact name of registrant as specified in its charter) Pennsylvania 1-15579 46-4914539 (State or other jurisdiction of incorporation or organiza

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM SD SPECIALIZED DISCLOSURE REPORT MSA Safety Incorporated (Exact name of the registrant as specified in its charter) Pennsylvania 1-15579 46-4914539 (State or other jurisdict

SD 1 a2024formsd.htm SD UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM SD SPECIALIZED DISCLOSURE REPORT MSA Safety Incorporated (Exact name of the registrant as specified in its charter) Pennsylvania 1-15579 46-4914539 (State or other jurisdiction of incorporation or organization) (Commission File Number) (IRS Employer Identification No.) 1000 Cranberry Woods Drive Cr

Conflict Minerals Report as required by Items 1.01 and 1.02 of this Form.

EXHIBIT 1.01 Conflict Minerals Report of MSA Safety Incorporated For The Year ended December 31, 2024 I. Introduction This is the Conflict Minerals Report (the "Report") of MSA Safety Incorporated ("MSA", the "company", "we", "us", or "our") for the calendar year ended December 31, 2024. The company has prepared this Report to comply with Rule 13p-1 under the Securities Exchange Act of 1934, as am

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): May 14, 2025 (May 13, 2025) MSA S

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): May 14, 2025 (May 13, 2025) MSA SAFETY INCORPORATED (Exact name of registrant as specified in its charter) Pennsylvania 1-15579 46-4914539 (State or other jurisdiction of incorporatio

Financial Statements and Exhibits, Other Events

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): May 7, 2025 (May 6, 2025) MSA SAFETY INCORPORATED (Exact name of registrant as specified in its charter) Pennsylvania 1-15579 46-4914539 (State or other jurisdiction of incorporation

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EXHIBIT 99.1 FOR IMMEDIATE RELEASE FROM: MSA Safety Incorporated Ticker: MSA (NYSE) Media Relations Contact: Mark Deasy (412) 559-8154 Investor Relations Contact: Larry De Maria – (917) 449-2237 MSA Safety Acquires M&C TechGroup, a Leading Manufacturer of Gas Analysis Solutions and Technologies •Acquisition expands MSA's Detection solutions and adds new capabilities in the gas analysis and process

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q ☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarter ended March 31, 2025 ☐ TRANSITION REPORT PURSUANT TO SECTION 1

Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q ☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarter ended March 31, 2025 or ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Commission File No. 1-15579 MSA SAFETY INCORPORATED (Exact name of registrant a

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EXHIBIT 99.1 FOR IMMEDIATE RELEASE FROM: MSA Safety Incorporated Ticker: MSA (NYSE) Media Relations Contact: Mark Deasy (412) 559-8154 Investor Relations Contact: Larry De Maria (917) 449-2237 MSA Safety Announces First Quarter 2025 Results First Quarter 2025 Highlights •Achieved quarterly net sales of $421 million, a 2% GAAP increase and 4% organic(a) increase year-over-year •Generated GAAP opera

Financial Statements and Exhibits, Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): April 29, 2025 MSA SAFETY INCORPORATED (Exact name of registrant as specified in its charter) Pennsylvania 1-15579 46-4914539 (State or other jurisdiction of incorporation or organiza

Amendment No. 4 to Second Amended and Restated Master Note Facility, dated as of April 1, 2025, by and among the Company, various Company subsidiaries as guarantors, NYL Investors LLC and each of the noteholders party thereto.

Exhibit 10.3 Execution Version AMENDMENT NO. 4 TO SECOND AMENDED AND RESTATED MASTER NOTE FACILITY THIS AMENDMENT NO. 4 TO SECOND AMENDED AND RESTATED MASTER NOTE FACILITY (this “Amendment”) is dated as of April 1, 2025 and is made by and among MSA SAFETY INCORPORATED, a Pennsylvania corporation (the “Company”), each Guarantor party hereto, NYL INVESTORS LLC (“New York Life”) and each of the holde

Creation of a Direct Financial Obligation or an Obligation under an Off-Balance Sheet Arrangement of a Registrant

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): April 1, 2025 MSA SAFETY INCORPORATED (Exact name of registrant as specified in its charter) Pennsylvania 1-15579 46-4914539 (State or other jurisdiction of incorporation or organizat

Agreement, dated as of April 1, 2025, by and among the Company, various Company subsidiaries as guarantors, PGIM, Inc. and each of the noteholders party thereto (incorporated by reference from

Exhibit 10.2 Execution Version AMENDMENT NO. 4 TO THIRD AMENDED AND RESTATED MULTI-CURRENCY NOTE PURCHASE AND PRIVATE SHELF AGREEMENT THIS AMENDMENT NO. 4 TO THIRD AMENDED AND RESTATED MULTICURRENCY NOTE PURCHASE AND PRIVATE SHELF AGREEMENT (this “Amendment”) is dated as of April 1, 2025 and is made by and among MSA SAFETY INCORPORATED, a Pennsylvania corporation (the “Company”), each Guarantor pa

Fifth Amended and Restated Credit Agreement dated as of April 1, 2025 by and among the Company, the other Borrowers party thereto, various Company subsidiaries, as guarantors,

Exhibit 10.1 Execution Version $1,300,000,000.00 REVOLVING CREDIT FACILITY FIFTH AMENDED AND RESTATED CREDIT AGREEMENT by and among MSA SAFETY INCORPORATED, a Pennsylvania corporation, THE OTHER BORROWERS PARTY HERETO, THE GUARANTORS PARTY HERETO, THE LENDERS PARTY HERETO, PNC BANK, NATIONAL ASSOCIATION, as Administrative Agent, PNC CAPITAL MARKETS LLC, as Joint Lead Arranger and Joint Bookrunner,

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.   )

Table of Contents 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: ☐ Preliminary Proxy Statement ☐ Confidential, for Use of the Commission Only (as permitted by Rule

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Net Sales BY SEGMENT e Americas International BY PRODUCT CATEGORY • Rre Service Detection • Industrial PPE and Other 2024 FINANCIAL HIGHLIGHTS KEY FINANCIAL METRICS Net Sales ORGANIC NET SALES CHANGE BY PRODUCT CATEGORY' $1.

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.   )

DEFA14A 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: ☐ Preliminary Proxy Statement ☐ Confidential, for Use of the Commission Only (as permitted by Rule 14a-6(e)(2

Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers, Financial Statements and Exhibits

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): March 13, 2025 MSA SAFETY INCORPORATED (Exact name of registrant as specified in its charter) Pennsylvania 1-15579 46-4914539 (State or other jurisdiction of incorporation or organiza

MSA Safety CFO Lee McChesney Resigns to Accept New Opportunity; Elyse Brody Appointed Interim CFO

EXHIBIT 99.1 FOR IMMEDIATE RELEASE FROM: MSA Safety Incorporated Ticker: MSA (NYSE) Media Relations Contact: Mark Deasy (412) 559-8154 Investor Relations Contact: Larry De Maria – (917) 245-7463 MSA Safety CFO Lee McChesney Resigns to Accept New Opportunity; Elyse Brody Appointed Interim CFO PITTSBURGH, March 13, 2025 - MSA Safety Incorporated (NYSE: MSA) today announced it has accepted the resign

2019 MSA Safety Incorporated Deferred Compensation Program for Non-employee Directors' is filed herewith.

Exhibit 10(o) MSA SAFETY INCORPORATED DEFERRED COMPENSATION PROGRAM FOR NON-EMPLOYEE DIRECTORS’ (Effective October 25, 2019) 1.

MSA Safety Incorporated Global Insider Trading Policy is filed herewith.

EXHIBIT 19 GLOBAL POLICY Insider Trading Policy Effective Date: 2/22/2023 Supersedes: 12/16/2020 Approved by: Board of Directors A.

Affiliates of the registrant is filed herewith.

EXHIBIT 21 MSA SAFETY INCORPORATED SUBSIDIARIES OF THE REGISTRANT DECEMBER 31, 2024 Name State or Other Jurisdiction of Incorporation Bacharach Holding Corp.

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-K ☒ ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the fiscal year ended December 31, 2024

Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-K ☒ ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the fiscal year ended December 31, 2024 OR ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 FOR THE TRANSITION PERIOD FROM TO Commission File No. 1-15579 MSA SAFETY IN

Form of MSA Safety Incorporated 2023 Management Equity Incentive Plan Restricted Stock Unit agreement between the registrant and its executive officers is filed herewith.

Exhibit 10(m) MSA SAFETY INCORPORATED MSA Corporate Center 1000 Cranberry Woods Drive Cranberry Township, PA 16066 2023 MANAGEMENT EQUITY INCENTIVE PLAN RESTRICTED STOCK UNIT AGREEMENT MSA SAFETY INCORPORATED, a Pennsylvania corporation (the “Company”), and the award recipient (the “Grantee”), for good and valuable consideration the receipt and adequacy of which are hereby acknowledged and intending to be legally bound hereby, agree as follows: .

Form of MSA Safety Incorporated 2023 Management Equity Incentive Plan Performance Stock Unit agreement between the registrant and its executive officers is filed herewith.

Exhibit 10(l) MSA SAFETY INCORPORATED MSA Corporate Center 1000 Cranberry Woods Drive Cranberry Township, PA 16066 2023 MANAGEMENT EQUITY INCENTIVE PLAN PERFORMANCE STOCK UNIT AGREEMENT MSA SAFETY INCORPORATED, a Pennsylvania corporation (the “Company”), and the award recipient (the “Grantee”), for good and valuable consideration the receipt and adequacy of which are hereby acknowledged and intending to be legally bound hereby, agree as follows: .

Form of MSA Safety Incorporated 2024 Non-Employee Directors' Equity Incentive Plan Restricted Stock agreement between the registrant and Non-employee Directors' is filed herewith.

Exhibit 10(n) MSA SAFETY INCORPORATED MSA Corporate Center 1000 Cranberry Woods Drive Cranberry Township, PA 16066 2024 NON-EMPLOYEE DIRECTORS’ EQUITY INCENTIVE PLAN RESTRICTED STOCK AGREEMENT MSA SAFETY INCORPORATED, a Pennsylvania corporation (the “Company”), and the award recipient (the “Grantee”), for good and valuable consideration the receipt and adequacy of which are hereby acknowledged and intending to be legally bound hereby, agree as follows: .

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EXHIBIT 99.1 FOR IMMEDIATE RELEASE FROM: MSA Safety Incorporated Ticker: MSA (NYSE) Media Relations Contact: Mark Deasy (412) 559-8154 Investor Relations Contact: Larry De Maria (917) 449-2237 MSA Safety Announces Fourth Quarter and Full Year 2024 Results Fourth Quarter 2024 Highlights •Achieved net sales of $500 million, a 1% GAAP increase and 2% organic(a) increase year-over-year •Generated GAAP

Financial Statements and Exhibits, Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): February 12, 2025 MSA SAFETY INCORPORATED (Exact name of registrant as specified in its charter) Pennsylvania 1-15579 46-4914539 (State or other jurisdiction of incorporation or organ

JOINT FILING STATEMENT PURSUANT TO RULE 13D-1(K)(1)

Exhibit I JOINT FILING STATEMENT PURSUANT TO RULE 13D-1(K)(1) The undersigned hereby consent and agree to file a joint statement on Schedule 13G under the Securities Exchange Act of 1934, as amended, with respect to the Common Stock, with no par value, of MSA Safety Inc.

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q ☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarter ended September 30, 2024 ☐ TRANSITION REPORT PURSUANT TO SECTI

Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q ☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarter ended September 30, 2024 or ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Commission File No. 1-15579 MSA SAFETY INCORPORATED (Exact name of registra

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EXHIBIT 99.1 FOR IMMEDIATE RELEASE FROM: MSA Safety Incorporated Ticker: MSA (NYSE) Media Relations Contact: Mark Deasy (412) 559-8154 Investor Relations Contact: Larry De Maria (917) 449-2237 MSA Safety Announces Third Quarter 2024 Results Strong execution drives resilient margins and EPS growth; Expecting mid-single-digit fourth quarter sales growth, resulting in low-single-digit full-year growt

Financial Statements and Exhibits, Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): October 23, 2024 MSA SAFETY INCORPORATED (Exact name of registrant as specified in its charter) Pennsylvania 1-15579 46-4914539 (State or other jurisdiction of incorporation or organi

MSA / MSA Safety Incorporated / JPMORGAN CHASE & CO - FILING MSA SAFETY INCORPORATED Passive Investment

Schedule 13G UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G Under the Securities Exchange Act of 1934 (Amendment No. 01)* MSA SAFETY INCORPORATED (Name of Issuer) Common Stock, no par value (Title of Class of Securities) 553498106 (CUSIP Number) July 31, 2024 (Date of Event Which Requires Filing of this Statement) Check the appropriate box to designate the rul

Calculation of Filing Fee Table.

EX-FILING FEES Exhibit 107 Calculation of Filing Fee Tables Form S-8 (Form Type) MSA Safety Incorporated (Exact Name of Registrant as Specified in its Charter) Table 1: Newly Registered Securities Security Type Security Class Title Fee Calculation Rule Amount Registered(1) Proposed Maximum Offering Price Per Share Maximum Aggregate Offering Price Fee Rate Amount of Registration Fee Equity Common Stock, without par value Rule 457(c) and Rule 457(h) 25,000 $192.

As filed with the Securities and Exchange Commission on July 26, 2024

S-8 As filed with the Securities and Exchange Commission on July 26, 2024 Registration No.

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q ☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarter ended June 30, 2024 ☐ TRANSITION REPORT PURSUANT TO SECTION 13

Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q ☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarter ended June 30, 2024 or ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Commission File No. 1-15579 MSA SAFETY INCORPORATED (Exact name of registrant as

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EXHIBIT 99.1 FOR IMMEDIATE RELEASE FROM: MSA Safety Incorporated Ticker: MSA (NYSE) Media Relations Contact: Mark Deasy (412) 559-8154 Investor Relations Contact: Larry De Maria (917) 449-2237 MSA Safety Announces Second Quarter 2024 Results Strong execution drives healthy sales growth and margin improvement; Maintaining mid-single digit full-year sales growth outlook PITTSBURGH, July 24, 2024 - G

Financial Statements and Exhibits, Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): July 24, 2024 MSA SAFETY INCORPORATED (Exact name of registrant as specified in its charter) Pennsylvania 1-15579 46-4914539 (State or other jurisdiction of incorporation or organizat

Financial Statements and Exhibits, Other Events

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): June 5, 2024 MSA SAFETY INCORPORATED (Exact name of registrant as specified in its charter) Pennsylvania 1-15579 46-4914539 (State or other jurisdiction of incorporation or organizati

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EXHIBIT 99.1 FOR IMMEDIATE RELEASE FROM: MSA Safety Incorporated Ticker: MSA (NYSE) Media Relations Contact: Mark Deasy (412) 559-8154 Investor Relations Contact: Larry De Maria – (917) 245-7463 Dave Howells to Lead International Business Segment for MSA Safety PITTSBURGH, June 5, 2024 - MSA Safety, Inc. (NYSE: MSA), a global leader in the development of advanced safety products and solutions that

Conflict Minerals Report as required by Items 1.01 and 1.02 of this Form.

EXHIBIT 1.01 Conflict Minerals Report of MSA Safety Incorporated For The Year ended December 31, 2023 I. Introduction This is the Conflict Minerals Report (the "Report") of MSA Safety Incorporated ("MSA", the "company", "we", "us", or "our") for the calendar year ended December 31, 2023. The company has prepared this Report to comply with Rule 13p-1 under the Securities Exchange Act of 1934, as am

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM SD SPECIALIZED DISCLOSURE REPORT MSA Safety Incorporated (Exact name of the registrant as specified in its charter) Pennsylvania 1-15579 46-4914539 (State or other jurisdict

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM SD SPECIALIZED DISCLOSURE REPORT MSA Safety Incorporated (Exact name of the registrant as specified in its charter) Pennsylvania 1-15579 46-4914539 (State or other jurisdiction of incorporation or organization) (Commission File Number) (IRS Employer Identification No.) 1000 Cranberry Woods Drive Cranberry Township, Pennsy

Submission of Matters to a Vote of Security Holders

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): May 13, 2024 MSA SAFETY INCORPORATED (Exact name of registrant as specified in its charter) Pennsylvania 1-15579 46-4914539 (State or other jurisdiction of incorporation or organizati

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EXHIBIT 99.1 FOR IMMEDIATE RELEASE FROM: MSA Safety Incorporated Ticker: MSA (NYSE) Media Relations Contact: Mark Deasy (412) 559-8154 Investor Relations Contact: Larry De Maria – (917) 245-7463 MSA Safety Board Elects Nish Vartanian Non-Executive Chairman; Steve Blanco Assumes President and CEO Role PITTSBURGH, May 13, 2024 - The Board of Directors of MSA Safety, Inc. (NYSE: MSA), a global leader

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EXHIBIT 99.1 FOR IMMEDIATE RELEASE FROM: MSA Safety Incorporated Ticker: MSA (NYSE) Media Relations Contact: Mark Deasy (412) 559-8154 Investor Relations Contact: Larry De Maria – (917) 245-7463 MSA Safety Announces Share Repurchase Program PITTSBURGH, May 13, 2024 - MSA Safety, Inc. (NYSE: MSA), announced that on May 10, 2024, its Board of Directors authorized a new share repurchase plan of up to

Financial Statements and Exhibits, Other Events

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): May 13, 2024 MSA SAFETY INCORPORATED (Exact name of registrant as specified in its charter) Pennsylvania 1-15579 46-4914539 (State or other jurisdiction of incorporation or organizati

Financial Statements and Exhibits, Other Events

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): May 13, 2024 MSA SAFETY INCORPORATED (Exact name of registrant as specified in its charter) Pennsylvania 1-15579 46-4914539 (State or other jurisdiction of incorporation or organizati

Termination Agreement, dated as of February 28, 2

EXHIBIT 10.1

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q ☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarter ended March 31, 2024 ☐ TRANSITION REPORT PURSUANT TO SECTION 1

Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q ☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarter ended March 31, 2024 or ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Commission File No. 1-15579 MSA SAFETY INCORPORATED (Exact name of registrant a

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EXHIBIT 99.1 FOR IMMEDIATE RELEASE FROM: MSA Safety Incorporated Ticker: MSA (NYSE) Media Relations Contact: Mark Deasy (412) 559-8154 Investor Relations Contact: Chris Hepler (412) 225-3717 MSA Safety Announces First Quarter 2024 Results and Upcoming Investor Events Healthy sales growth and robust margin expansion; Maintaining mid-single digit full year sales growth outlook PITTSBURGH, April 29,

Financial Statements and Exhibits, Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): April 29, 2024 MSA SAFETY INCORPORATED (Exact name of registrant as specified in its charter) Pennsylvania 1-15579 46-4914539 (State or other jurisdiction of incorporation or organiza

ARS

Annual Report 202326% 38% 36% Business of MSA Safety MSA Safety is a global leader in the development, manufacture and supply of innovative safety products and software that help protect people and facility infrastructures throughout the world.

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.   )

DEFA14A 1 d873896ddefa14a.htm DEFA14A 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: ☐ Preliminary Proxy Statement ☐ Confidential, for Use of the Commission Only (a

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.   )

Table of Contents 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: ☐ Preliminary Proxy Statement ☐ Confidential, for Use of the Commission Only (as permitted by Rule

Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K/A CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): February 28, 2024 MSA SAFETY INCORPORATED (Exact name of registrant as specified in its charter) Pennsylvania 1-15579 46-4914539 (State or other jurisdiction of incorporation or org

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EXHIBIT 99.1 FROM: MSA (MSA Safety Incorporated) Ticker: MSA (NYSE) Media Relations Contact: Mark Deasy - (412) 559-8154 Investor Relations Contact: Chris Hepler - (412) 225-3717 MSA Safety Announces the Retirement of John T. Ryan III, Director PITTSBURGH, February 22, 2024 – MSA Safety Incorporated (NYSE: MSA), the global leader in the development of advanced safety products and solutions that he

Financial Statements and Exhibits, Other Events

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): February 22, 2024 (February 21, 2024) MSA SAFETY INCORPORATED (Exact name of registrant as specified in its charter) Pennsylvania 1-15579 46-4914539 (State or other jurisdiction of in

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EXHIBIT 99.1 FROM: MSA (MSA Safety Incorporated) Ticker: MSA (NYSE) Media Relations Contact: Mark Deasy - (412) 559-8154 Investor Relations Contact: Chris Hepler - (412) 225-3717 MSA Safety Elects Steve Blanco CEO as Part of Planned Management Succession; Nish Vartanian to Retire PITTSBURGH, February 22, 2024 – The Board of Directors of MSA Safety, Inc. (NYSE: MSA), a global leader in the developm

Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers, Financial Statements and Exhibits

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): February 22, 2024 (February 21, 2024) MSA SAFETY INCORPORATED (Exact name of registrant as specified in its charter) Pennsylvania 1-15579 46-4914539 (State or other jurisdiction of in

Mandatory Recoupment Policy is filed herewith.

Exhibit 97 Mandatory Recoupment Policy Effective Date: 12/01/23 Approved by: Board of Directors OBJECTIVE The objective of this policy (the “Policy”) is to provide for recoupment of certain compensation in the event of an accounting restatement resulting from material noncompliance with financial reporting requirements under the federal securities laws and as otherwise provided herein.

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-K ☒ ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the fiscal year ended December 31, 2023

Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-K ☒ ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the fiscal year ended December 31, 2023 OR ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 FOR THE TRANSITION PERIOD FROM TO Commission File No. 1-15579 MSA SAFETY IN

MSA Safety, Inc. Executive Incentive Plan as of January 1, 2023,

Exhibit 10(g) MSA SAFETY, INC. EXECUTIVE INCENTIVE PLAN 1. Purposes. The objectives of the MSA Safety, Inc. Executive Incentive Plan are to attract and retain highly-qualified executives by providing appropriate performance‑based short‑term incentive awards, to provide a strong financial incentive each year for the excellent performance of each participating executive by making a significant perce

Affiliates of the registrant is filed herewith.

EXHIBIT 21 MSA SAFETY INCORPORATED SUBSIDIARIES OF THE REGISTRANT DECEMBER 31, 2023 Name State or Other Jurisdiction of Incorporation Bacharach Holding Corp.

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EXHIBIT 99.1 FOR IMMEDIATE RELEASE FROM: MSA Safety Incorporated Ticker: MSA (NYSE) Media Relations Contact: Mark Deasy (412) 559-8154 Investor Relations Contact: Chris Hepler (412) 225-3717 MSA Safety Announces Fourth Quarter and Full Year 2023 Results Strong quarterly results and resilient demand support healthy outlook for 2024 PITTSBURGH, February 14, 2024 - Global safety equipment and solutio

Financial Statements and Exhibits, Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): February 14, 2024 MSA SAFETY INCORPORATED (Exact name of registrant as specified in its charter) Pennsylvania 1-15579 46-4914539 (State or other jurisdiction of incorporation or organ

MSA / MSA Safety Incorporated / VANGUARD GROUP INC - SCHEDULE 13G/A Passive Investment

SC 13G/A 1 tv01492-msasafetyinc.htm SCHEDULE 13G/A SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Schedule 13G Under the Securities Exchange Act of 1934 (Amendment No.: 11)* Name of issuer: MSA Safety Inc Title of Class of Securities: Common Stock CUSIP Number: 553498106 Date of Event Which Requires Filing of this Statement: December 29, 2023 Check the appropriate box to designate the r

Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): February 9, 2024 (February 9, 2024) MSA SAFETY INCORPORATED (Exact name of registrant as specified in its charter) Pennsylvania 1-15579 46-4914539 (State or other jurisdiction of inco

Joint Filing Statement Statement Pursuant to Rule 13d-1(k)(1)

EX-1 2 ex1.htm Exhibit 1 Joint Filing Statement Statement Pursuant to Rule 13d-1(k)(1) The undersigned hereby consent and agree to file a joint statement on Schedule 13G under the Securities Exchange Act of 1934, as amended, with respect to the Common Stock, with no par value, of MSA Safety Inc., beneficially owned by them, together with any or all amendments thereto, when and if appropriate. The

MSA / MSA Safety Incorporated / APG Asset Management US Inc. Passive Investment

SC 13G/A 1 formsc13ga.htm UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 SCHEDULE 13G Under the Securities Exchange Act of 1934 (Amendment No. 4)* MSA Safety Inc. (Name of Issuer) Common Stock, no par value (Title of Class of Securities) 553498106 (CUSIP Number) December 31, 2023 (Date of Event Which Requires Filing of this Statement) Check the appropriate box to designate t

MSA / MSA Safety Incorporated / BlackRock Inc. Passive Investment

us5534981064012524.txt SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G Under the Securities Exchange Act of 1934 (Amendment No: 15) MSA SAFETY INCORPORATED - (Name of Issuer) Common Stock - (Title of Class of Securities) 553498106 - (CUSIP Number) December 31, 2023 - (Date of Event Which Requires Filing of this Statement) Check the appropriate box to designate the rule pursu

MSA / MSA Safety Incorporated / STATE STREET CORP Passive Investment

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 SCHEDULE 13G UNDER THE SECURITIES EXCHANGE ACT OF 1934 EXIT FILING MSA SAFETY INC (NAME OF ISSUER) COMMON STOCK (TITLE OF CLASS OF SECURITIES) 553498106 (CUSIP NUMBER) 12/31/2023 (DATE OF EVENT WHICH REQUIRES FILING OF THIS STATEMENT) CHECK THE APPROPRIATE BOX TO DESIGNATE THE RULE PURSUANT TO WHICH THIS SCHEDULE IS FILED: (X)

MSA / MSA Safety Incorporated / JPMORGAN CHASE & CO - FILING MSA SAFETY INCORPORATED Passive Investment

SC 13G 1 MSASAFETYINCORPORATED.ht.htm FILING MSA SAFETY INCORPORATED UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G Under the Securities Exchange Act of 1934 (Amendment No. )* MSA SAFETY INCORPORATED (Name of Issuer) Common Stock, no par value (Title of Class of Securities) 553498106 (CUSIP Number) December 29, 2023 (Date of Event Which Requires Filing of this

Amendments to Articles of Incorporation or Bylaws; Change in Fiscal Year, Financial Statements and Exhibits

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): November 2, 2023 (October 27, 2023) MSA SAFETY INCORPORATED (Exact name of registrant as specified in its charter) Pennsylvania 1-15579 46-4914539 (State or other jurisdiction of inco

Amended and restated By-laws of the registrant, filed as Exhibit 3.1 to Form 8-K on November 2, 2023, is incorporated herein by reference.

MSA SAFETY INCORPORATED (a Pennsylvania corporation) Amended and Restated By-Laws October 27, 20231 * * * * * ARTICLE I Meetings of Shareholders Section 1.

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q ☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarter ended September 30, 2023 ☐ TRANSITION REPORT PURSUANT TO SECTI

Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q ☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarter ended September 30, 2023 or ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Commission File No. 1-15579 MSA SAFETY INCORPORATED (Exact name of registra

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EXHIBIT 99.1 FOR IMMEDIATE RELEASE FROM: MSA Safety Incorporated Ticker: MSA (NYSE) Media Relations Contact: Mark Deasy (412) 559-8154 Investor Relations Contact: Chris Hepler (412) 225-3717 MSA Safety Announces Third Quarter Results Increasing full year sales growth outlook to mid-teens, supported by robust double-digit sales and earnings growth in the third quarter PITTSBURGH, October 24, 2023 -

Financial Statements and Exhibits, Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): October 24, 2023 MSA SAFETY INCORPORATED (Exact name of registrant as specified in its charter) Pennsylvania 1-15579 46-4914539 (State or other jurisdiction of incorporation or organi

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q ☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarter ended June 30, 2023 ☐ TRANSITION REPORT PURSUANT TO SECTION 13

Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q ☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarter ended June 30, 2023 or ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Commission File No. 1-15579 MSA SAFETY INCORPORATED (Exact name of registrant as

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): July 31, 2023 MSA SAFETY INCORPOR

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): July 31, 2023 MSA SAFETY INCORPORATED (Exact name of registrant as specified in its charter) Pennsylvania 1-15579 46-4914539 (State or other jurisdiction of incorporation or organizat

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EXHIBIT 99.1 FOR IMMEDIATE RELEASE FROM: MSA Safety Incorporated Ticker: MSA (NYSE) Media Relations Contact: Mark Deasy (412) 559-8154 Investor Relations Contact: Chris Hepler (412) 225-3717 MSA Safety Announces Second Quarter Results Strong double-digit sales and earnings growth; increasing full year sales growth outlook to low double-digits PITTSBURGH, July 31, 2023 - Global safety equipment and

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): July 5, 2023 (June 29, 2023) MSA

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): July 5, 2023 (June 29, 2023) MSA SAFETY INCORPORATED (Exact name of registrant as specified in its charter) Pennsylvania 1-15579 46-4914539 (State or other jurisdiction of incorporati

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EXHIBIT 99.1 FROM: MSA (MSA Safety Incorporated) Ticker: MSA (NYSE) Media Relations Contact: Mark Deasy - (412) 559-8154 Investor Relations Contact: Chris Hepler - (412) 225-3717 Stephanie L. Sciullo to Lead Americas Business Segment for MSA Safety PITTSBURGH, June 26, 2023 – MSA Safety Incorporated (NYSE: MSA), the leading global manufacturer of safety products and solutions that protect people a

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EXHIBIT 99.2 FROM: MSA (MSA Safety Incorporated) Ticker: MSA (NYSE) Media Relations Contact: Mark Deasy - (412) 559-8154 Investor Relations Contact: Chris Hepler - (412) 225-3717 MSA Safety Names Richard Roda Chief Legal Officer Roda elected Vice President, Secretary and Chief Legal Officer and joins the company’s Executive Leadership Team PITTSBURGH, June 27, 2023 – MSA Safety Incorporated (NYSE:

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): June 29, 2023 (June 26, 2023) MSA

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): June 29, 2023 (June 26, 2023) MSA SAFETY INCORPORATED (Exact name of registrant as specified in its charter) Pennsylvania 1-15579 46-4914539 (State or other jurisdiction of incorporat

As filed with the Securities and Exchange Commission on June 15, 2023

S-8 POS As filed with the Securities and Exchange Commission on June 15, 2023 Registration No.

As filed with the Securities and Exchange Commission on June 9, 2023 UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 POST-EFFECTIVE AMENDMENT NO. 1 TO FORM S-8 REGISTRATION STATEMENT NO. 333-214397 POST-EFFECTIVE AMENDMENT NO.

S-8 POS Registration Nos. 333-214397 333-174601 333-157682 As filed with the Securities and Exchange Commission on June 9, 2023 UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 POST-EFFECTIVE AMENDMENT NO. 1 TO FORM S-8 REGISTRATION STATEMENT NO. 333-214397 POST-EFFECTIVE AMENDMENT NO. 1 TO FORM S-8 REGISTRATION STATEMENT NO. 333-174601 POST-EFFECTIVE AMENDMENT NO. 1 TO FORM

As filed with the Securities and Exchange Commission on June 9, 2023 UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 POST-EFFECTIVE AMENDMENT NO. 1 TO FORM S-8 REGISTRATION STATEMENT NO. 333-214397 POST-EFFECTIVE AMENDMENT NO.

S-8 POS Registration Nos. 333-214397 333-174601 333-157682 As filed with the Securities and Exchange Commission on June 9, 2023 UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 POST-EFFECTIVE AMENDMENT NO. 1 TO FORM S-8 REGISTRATION STATEMENT NO. 333-214397 POST-EFFECTIVE AMENDMENT NO. 1 TO FORM S-8 REGISTRATION STATEMENT NO. 333-174601 POST-EFFECTIVE AMENDMENT NO. 1 TO FORM

As filed with the Securities and Exchange Commission on June 9, 2023

S-8 As filed with the Securities and Exchange Commission on June 9, 2023 Registration No.

As filed with the Securities and Exchange Commission on June 9, 2023 UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 POST-EFFECTIVE AMENDMENT NO. 1 TO FORM S-8 REGISTRATION STATEMENT NO. 333-214397 POST-EFFECTIVE AMENDMENT NO.

S-8 POS Registration Nos. 333-214397 333-174601 333-157682 As filed with the Securities and Exchange Commission on June 9, 2023 UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 POST-EFFECTIVE AMENDMENT NO. 1 TO FORM S-8 REGISTRATION STATEMENT NO. 333-214397 POST-EFFECTIVE AMENDMENT NO. 1 TO FORM S-8 REGISTRATION STATEMENT NO. 333-174601 POST-EFFECTIVE AMENDMENT NO. 1 TO FORM

Calculation of Filing Fee Table.

Exhibit 107 Calculation of Filing Fee Tables Form S-8 (Form Type) MSA Safety Incorporated (Exact Name of Registrant as Specified in its Charter) Table 1: Newly Registered Securities Security Type Security Class Title Fee Calculation Rule Amount Registered(1) Proposed Maximum Offering Price Per Share Maximum Aggregate Offering Price Fee Rate Amount of Registration Fee Equity Common Stock, without par value Rule 457(c) and Rule 457(h) 1,400,000 $144.

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EXHIBIT 99.1 FROM: MSA (MSA Safety Incorporated) Ticker: MSA (NYSE) MSA Media Contact: Mark Deasy +1 (412) 559-8154 MSA Investor Relations Contact: Chris Hepler +1 (412) 225-3717 MSA Safety’s Steve Blanco Elected President and Chief Operating Officer PITTSBURGH, May 31, 2023 – Global safety equipment manufacturer MSA Safety Incorporated (NYSE: MSA) today announced that Steve Blanco has been electe

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): May 31, 2023 (May 30, 2023) MSA S

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): May 31, 2023 (May 30, 2023) MSA SAFETY INCORPORATED (Exact name of registrant as specified in its charter) Pennsylvania 1-15579 46-4914539 (State or other jurisdiction of incorporatio

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM SD SPECIALIZED DISCLOSURE REPORT MSA Safety Incorporated (Exact name of the registrant as specified in its charter) Pennsylvania 1-15579 46-4914539 (State or other jurisdict

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM SD SPECIALIZED DISCLOSURE REPORT MSA Safety Incorporated (Exact name of the registrant as specified in its charter) Pennsylvania 1-15579 46-4914539 (State or other jurisdiction of incorporation or organization) (Commission File Number) (IRS Employer Identification No.) 1000 Cranberry Woods Drive Cranberry Township, Pennsy

Conflict Minerals Report as required by Items 1.01 and 1.02 of this Form.

EXHIBIT 1.01 Conflict Minerals Report of MSA Safety Incorporated For The Year ended December 31, 2022 I. Introduction This is the Conflict Minerals Report (the "Report") of MSA Safety Incorporated ("MSA", the "company", "we", "us", or "our") for the calendar year ended December 31, 2022. The company has prepared this Report to comply with Rule 13p-1 under the Securities Exchange Act of 1934, as am

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): May 12, 2023 MSA SAFETY INCORPORA

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): May 12, 2023 MSA SAFETY INCORPORATED (Exact name of registrant as specified in its charter) Pennsylvania 1-15579 46-4914539 (State or other jurisdiction of incorporation or organizati

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q ☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarter ended March 31, 2023 ☐ TRANSITION REPORT PURSUANT TO SECTION 1

Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q ☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarter ended March 31, 2023 or ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Commission File No. 1-15579 MSA SAFETY INCORPORATED (Exact name of registrant a

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): May 1, 2023 MSA SAFETY INCORPORAT

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): May 1, 2023 MSA SAFETY INCORPORATED (Exact name of registrant as specified in its charter) Pennsylvania 1-15579 46-4914539 (State or other jurisdiction of incorporation or organizatio

% Change(a)

EXHIBIT 99.1 FOR IMMEDIATE RELEASE FROM: MSA Safety Incorporated Ticker: MSA (NYSE) Media Relations Contact: Mark Deasy (412) 559-8154 Investor Relations Contact: Chris Hepler (412) 225-3717 MSA Safety Announces First Quarter Results Continued strong demand drives double-digit sales growth PITTSBURGH, May 1, 2023 - Global safety equipment manufacturer MSA Safety Incorporated (NYSE: MSA) today repo

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. )

Table of Contents 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: ☐ Preliminary Proxy Statement ☐ Confidential, for Use of the Commission Only (as permitted by Rule 14

ARS

The Safety Company ANNUAL REPORT 2022 OUR MISSION That men and women may work in safety and that they, their families and their communities may live in health throughout the world.

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. )

DEFA14A 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: ☐ Preliminary Proxy Statement ☐ Confidential, for Use of the Commission Only (as permitted by Rule 14a-6(e)(2))

Affiliates of the registrant is filed herewith.

EXHIBIT 21 MSA SAFETY INCORPORATED SUBSIDIARIES OF THE REGISTRANT DECEMBER 31, 2022 Name State or Other Jurisdiction of Incorporation Compañia MSA de Argentina S.

Executive Incentive Plan, as of January 1, 2020, is filed herewith.

MSA SAFETY, INC. EXECUTIVE INCENTIVE PLAN As of January 1, 2020 1. Purposes. The objectives of the MSA Safety, Inc. Executive Incentive Plan are to attract and retain highly-qualified executives by providing appropriate performance-based short-term incentive awards, to provide a strong financial incentive each year for the excellent performance of each participating executive by making a significa

2005 Supplemental Savings Plan, as amended and restated, effective June 1, 2022, is incorporated herein by reference.

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-K ☒ ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the fiscal year ended December 31, 2022

Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-K ☒ ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the fiscal year ended December 31, 2022 OR ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 FOR THE TRANSITION PERIOD FROM TO Commission File No. 1-15579 MSA SAFETY IN

% Change (a)

EXHIBIT 99.1 FOR IMMEDIATE RELEASE FROM: MSA Safety Incorporated Ticker: MSA (NYSE) Media Relations Contact: Mark Deasy (412) 559-8154 Investor Relations Contact: Chris Hepler (412) 225-3717 MSA Safety Announces Fourth Quarter and Full Year 2022 Results Record quarterly sales and elevated backlog support healthy outlook for 2023 PITTSBURGH, February 15, 2023 - Global safety equipment manufacturer

Financial Statements and Exhibits, Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): February 15, 2023 MSA SAFETY INCORPORATED (Exact name of registrant as specified in its charter) Pennsylvania 1-15579 46-4914539 (State or other jurisdiction of incorporation or organ

MSA / MSA Safety Inc / STATE STREET CORP Passive Investment

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 SCHEDULE 13G UNDER THE SECURITIES EXCHANGE ACT OF 1934 AMENDED FILING MSA SAFETY INC (NAME OF ISSUER) COMMON STOCK (TITLE OF CLASS OF SECURITIES) 553498106 (CUSIP NUMBER) 12/31/2022 (DATE OF EVENT WHICH REQUIRES FILING OF THIS STATEMENT) CHECK THE APPROPRIATE BOX TO DESIGNATE THE RULE PURSUANT TO WHICH THIS SCHEDULE IS FILED:

MSA / MSA Safety Inc / VANGUARD GROUP INC - SCHEDULE 13G/A Passive Investment

SC 13G/A 1 tv01459-msasafetyinc.htm SCHEDULE 13G/A SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Schedule 13G Under the Securities Exchange Act of 1934 (Amendment No.: 10)* Name of issuer: MSA Safety Inc. Title of Class of Securities: Common Stock CUSIP Number: 553498106 Date of Event Which Requires Filing of this Statement: December 30, 2022 Check the appropriate box to designate the

MSA / MSA Safety Inc / BlackRock Inc. Passive Investment

SC 13G/A 1 us5534981064020323.txt us5534981064020323.txt SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G Under the Securities Exchange Act of 1934 (Amendment No: 14) MSA SAFETY INCORPORATED - (Name of Issuer) Common Stock - (Title of Class of Securities) 553498106 - (CUSIP Number) December 31, 2022 - (Date of Event Which Requires Filing of this Statement) Check the appropria

MSA / MSA Safety Inc / APG Asset Management US Inc. - SC 13G/A Passive Investment

SC 13G/A UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G Under the Securities Exchange Act of 1934 (Amendment No. 3) MSA Safety Inc. (Name of Issuer) Common Stock, no par value (Title of Class of Securities) 553498106 (CUSIP Number) December 31, 2022 (Date of Event Which Requires Filing of this Statement) Check the appropriate box to designate the rule pursuant

Amendments to Fourth Amended and Restated Credit Agreement, dated May 24, 2021, as amended, among the Company, the other Borrowers party thereto, the Guarantors party thereto, the Lenders party thereto and PNC Bank, National Association, as Administrative Agent, filed as Exhibit 10.3 to Form 8‑K on January 6, 2023, is incorporated herein by reference.

Exhibit 10.3 Execution Version December 30, 2022 MSA Safety Incorporated 1000 Cranberry Woods Drive Cranberry Township, Pennsylvania 16066 Re: Credit Facility provided to MSA Safety Incorporated Dear Ladies and Gentlemen: Reference is made to that certain Fourth Amended and Restated Credit Agreement, dated as of May 24, 2021, by and among MSA Safety Incorporated (the ?Company? or ?you?), the other

Entry into a Material Definitive Agreement, Financial Statements and Exhibits, Creation of a Direct Financial Obligation or an Obligation under an Off-Balance Sheet Arrangement of a Registrant, Completion of Acquisition or Disposition of Assets

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): January 5, 2023 MSA SAFETY INCORPORATED (Exact name of registrant as specified in its charter) Pennsylvania 1-15579 46-4914539 (State or other jurisdiction of incorporation or organiz

Membership Interest Purchase Agreement, dated January 5, 2023, by and among MSA Worldwide, LLC, a Pennsylvania limited liability company, Mine Safety Appliances Company, LLC, a Pennsylvania limited liability company, Sag Main Holdings, LLC, a Delaware limited liability company, and MSA Safety Jacksonville Manufacturing LLC, a Pennsylvania limited liability company, filed as Exhibit 10.1 to Form 8-K on January 6, 2023, is incorporated by reference.

Exhibit 10.1 CONFIDENTIAL MEMBERSHIP INTEREST PURCHASE AGREEMENT by and among MSA WORLDWIDE, LLC, MINE SAFETY APPLIANCES COMPANY, LLC, SAG MAIN HOLDINGS, LLC and solely for purposes of Article V hereof MSA SAFETY JACKSONVILLE MANUFACTURING, LLC Dated as of January 5, 2023 TABLE OF CONTENTS Page ARTICLE I CLOSING 2 Section 1.1 Purchase and Sale 2 Section 1.2 Closing Date and Deliveries 2 Section 1.

Unaudited Pro Forma Condensed Consolidated Financial Statements

EX-99.1 7 d439186dex991.htm EX-99.1 Exhibit 99.1 Unaudited Pro Forma Condensed Consolidated Financial Statements On January 5, 2023, MSA Worldwide, LLC (“MSA Worldwide”), a wholly-owned subsidiary of MSA Safety Incorporated (together with its consolidated subsidiaries, the “Company”), Mine Safety Appliances Company, LLC (“MSAC LLC”), a wholly-owned subsidiary of MSA Worldwide, and MSA Safety Jacks

Amendment No. 1 and Consent to Second Amended and Restated Master Note Facility, dated as of December 30, 2022, among MSA Safety Incorporated, each of the Guarantors signatory hereto, NYL Investors LLC and each of the holders of Notes, filed as Exhibit 10.5 to Form 8‑K on January 6, 2023, is incorporated herein by reference.

Exhibit 10.5 Execution Version AMENDMENT NO. 1 AND CONSENT TO SECOND AMENDED AND RESTATED MASTER NOTE FACILITY AMENDMENT NO. 1 AND CONSENT TO SECOND AMENDED AND RESTATED MASTER NOTE FACILITY, dated as of December 30, 2022 (this ?Agreement?), is among MSA SAFETY INCORPORATED, a Pennsylvania corporation (the ?Company?), each of the Guarantors signatory hereto, NYL Investors LLC (?New York Life?) and

Credit Agreement, dated January 5, 2023, by and among the Company, as borrower, various Company subsidiaries, as guarantors, various financial institutions, as lenders, and PNC Bank, National Association, as administrative agent, filed as Exhibit 10.2 to Form 8‑K on January 6, 2023, is incorporated herein by reference.

EX-10.2 3 d439186dex102.htm EX-10.2 Exhibit 10.2 Execution Version CREDIT AGREEMENT by and among MSA SAFETY INCORPORATED, a Pennsylvania corporation, as BORROWER THE GUARANTORS PARTY HERETO, THE LENDERS PARTY HERETO, PNC BANK, NATIONAL ASSOCIATION, as Administrative Agent, JPMORGAN CHASE BANK, N.A. and BANK OF AMERICA, N.A., as Co-Syndication Agents, and PNC CAPITAL MARKETS LLC, JPMORGAN CHASE BAN

Amendment No. 1 and Consent to Third Amended and Restated Multicurrency Note Purchase and Private Shelf Agreement, dated as of December 30, 2022, among MSA Safety Incorporated, each of the Guarantors signatory hereto, PGIM, INC. and each of the holders of Notes, filed as Exhibit 10.4 to Form 8‑K on January 6, 2023, is incorporated herein by reference.

Exhibit 10.4 Execution Version AMENDMENT NO. 1 AND CONSENT TO THIRD AMENDED AND RESTATED MULTI-CURRENCY NOTE PURCHASE AND PRIVATE SHELF AGREEMENT AMENDMENT NO. 1 AND CONSENT TO THIRD AMENDED AND RESTATED MULTICURRENCY NOTE PURCHASE AND PRIVATE SHELF AGREEMENT, dated as of December 30, 2022 (this ?Agreement?), is among MSA SAFETY INCORPORATED, a Pennsylvania corporation (the ?Company?), each of the

Simplifies Balance Sheet and Strengthens Cash Flow Profile Positions MSA Safety for Long-term Growth and Profitability Investor Conference Call on January 6, 2023 at 8:30 Eastern Time

EXHIBIT 99.1 FOR IMMEDIATE RELEASE FROM: MSA (MSA Safety Incorporated) Ticker: MSA (NYSE) MSA Media Contact: Mark Deasy +1 (412) 559-8154 MSA Investor Relations Contact: Chris Hepler +1 (412) 225-3717 MSA Safety Announces Divestiture of its Subsidiary Holding Legacy Liabilities Simplifies Balance Sheet and Strengthens Cash Flow Profile Positions MSA Safety for Long-term Growth and Profitability In

Financial Statements and Exhibits, Other Events

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): January 5, 2023 MSA SAFETY INCORPORATED (Exact name of registrant as specified in its charter) Pennsylvania 1-15579 46-4914539 (State or other jurisdiction of incorporation or organiz

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q ☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarter ended September 30, 2022 ☐ TRANSITION REPORT PURSUANT TO SECTI

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q ? QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarter ended September 30, 2022 or ? TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Commission File No. 1-15579 MSA SAFETY INCORPORATED (Exact name of registrant as specified in

Americas International Corporate Consolidated Three Months Ended September 30, 2022 Net sales to external customers $ 276,082 $ 105,612 $ — $ 381,694 Operating income 64,313 Operating margin % 16.8 % Restructuring charges 899 Currency exchange losses

EXHIBIT 99.1 FOR IMMEDIATE RELEASE FROM: MSA Safety Incorporated Ticker: MSA (NYSE) Media Relations Contact: Mark Deasy (412) 559-8154 Investor Relations Contact: Chris Hepler (412) 225-3717 MSA Safety Announces Third Quarter Results Strong demand and focused execution drive double-digit sales and earnings growth PITTSBURGH, October 26, 2022 - Global safety equipment manufacturer MSA Safety Incorp

Financial Statements and Exhibits, Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): October 26, 2022 MSA SAFETY INCORPORATED (Exact name of registrant as specified in its charter) Pennsylvania 1-15579 46-4914539 (State or other jurisdiction of incorporation or organi

Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers, Financial Statements and Exhibits

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): October 17, 2022 (October 17, 2022) MSA SAFETY INCORPORATED (Exact name of registrant as specified in its charter) Pennsylvania 1-15579 46-4914539 (State or other jurisdiction of inco

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EXHIBIT 99.1 FROM: MSA (MSA Safety Incorporated) Ticker: MSA (NYSE) MSA Media Contact: Mark Deasy +1 (412) 559-8154 MSA Investor Relations Contact: Chris Hepler +1 (412) 225-3717 MSA Safety Names Lee McChesney Senior Vice President and Chief Financial Officer PITTSBURGH, October 17, 2022 ? MSA Safety (NYSE: MSA), the global leader in the development and manufacture of safety products that help pro

Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers, Financial Statements and Exhibits

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K/A CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): August 11, 2022 MSA SAFETY INCORPORATED (Exact name of registrant as specified in its charter) Pennsylvania 1-15579 46-4914539 (State or other jurisdiction of incorporation or organ

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EXHIBIT 99.1 FROM: MSA (MSA Safety Incorporated) Ticker: MSA (NYSE) MSA Media Contact: Mark Deasy +1 (412) 559-8154 MSA Investor Relations Contact: Chris Hepler +1 (412) 225-3717 MSA Safety Announces Chief Financial Officer Transition PITTSBURGH, August 1, 2022 ? MSA Safety Incorporated (NYSE: MSA) today announced it has accepted the resignation of its Chief Financial Officer, Kenneth Krause, effe

Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers, Financial Statements and Exhibits

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): August 1, 2022 (July 28, 2022) MSA SAFETY INCORPORATED (Exact name of registrant as specified in its charter) Pennsylvania 1-15579 46-4914539 (State or other jurisdiction of incorpora

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q ☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarter ended June 30, 2022 ☐ TRANSITION REPORT PURSUANT TO SECTION 13

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q ? QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarter ended June 30, 2022 or ? TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Commission File No. 1-15579 MSA SAFETY INCORPORATED (Exact name of registrant as specified in its

Americas International Corporate Consolidated Three Months Ended June 30, 2022 Sales to external customers $ 252,386 $ 119,927 $ — $ 372,313 Operating income 61,536 Operating margin % 16.5 % Restructuring charges 57 Currency exchange gains, net (1,46

EXHIBIT 99.1 FOR IMMEDIATE RELEASE FROM: MSA Safety Incorporated Ticker: MSA (NYSE) Media Relations Contact: Mark Deasy (412) 559-8154 Investor Relations Contact: Chris Hepler (412) 225-3717 MSA Safety Announces Second Quarter Results Strong growth driven by execution of strategy and robust demand environment PITTSBURGH, July 27, 2022 - Global safety equipment manufacturer MSA Safety Incorporated

Financial Statements and Exhibits, Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): July 27, 2022 MSA SAFETY INCORPORATED (Exact name of registrant as specified in its charter) Pennsylvania 1-15579 46-4914539 (State or other jurisdiction of incorporation or organizat

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 11-K (Mark One) x ANNUAL REPORT PURSUANT TO SECTION 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the fiscal year ended December 31, 2021 ¨ TRANSITION REPORT PURSUANT TO

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 11-K (Mark One) x ANNUAL REPORT PURSUANT TO SECTION 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the fiscal year ended December 31, 2021 OR ¨ TRANSITION REPORT PURSUANT TO SECTION 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission file number 1-15579 A. Full title of the plan and

Conflict Minerals Report as required by Items 1.01 and 1.02 of this Form.

EX-1.01 2 a2021formsdexhibit-101.htm EX-1.01 EXHIBIT 1.01 Conflict Minerals Report of MSA Safety Incorporated For The Year ended December 31, 2021 I. Introduction This is the Conflict Minerals Report (the "Report") of MSA Safety Incorporated ("MSA", the "company", "we", "us", or "our") for the calendar year ended December 31, 2021. The company has prepared this Report to comply with Rule 13p-1 und

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM SD SPECIALIZED DISCLOSURE REPORT MSA Safety Incorporated (Exact name of the registrant as specified in its charter) Pennsylvania 1-15579 46-4914539 (State or other jurisdict

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM SD SPECIALIZED DISCLOSURE REPORT MSA Safety Incorporated (Exact name of the registrant as specified in its charter) Pennsylvania 1-15579 46-4914539 (State or other jurisdiction of incorporation or organization) (Commission File Number) (IRS Employer Identification No.) 1000 Cranberry Woods Drive Cranberry Township, Pennsy

Submission of Matters to a Vote of Security Holders

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): May 13, 2022 MSA SAFETY INCORPORATED (Exact name of registrant as specified in its charter) Pennsylvania 1-15579 46-4914539 (State or other jurisdiction of incorporation or organizati

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q ☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarter ended March 31, 2022 ☐ TRANSITION REPORT PURSUANT TO SECTION 1

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q ? QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarter ended March 31, 2022 or ? TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Commission File No. 1-15579 MSA SAFETY INCORPORATED (Exact name of registrant as specified in its

Americas International Corporate Consolidated Three Months Ended March 31, 2022 Sales to external customers $ 225,648 $ 105,044 $ — $ 330,692 Operating income 42,668 Operating margin % 12.9 % Restructuring charges 2,189 Currency exchange losses, net

EXHIBIT 99.1 FOR IMMEDIATE RELEASE FROM: MSA Safety Incorporated Ticker: MSA (NYSE) Media Relations Contact: Mark Deasy (412) 559 - 8154 Investor Relations Contact: Chris Hepler (412) 225 - 3717 MSA Safety Announces First Quarter Results PITTSBURGH, April 27, 2022 - Global safety equipment manufacturer MSA Safety Incorporated (NYSE: MSA) today reported financial results for the first quarter of 20

Financial Statements and Exhibits, Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): April 27, 2022 MSA SAFETY INCORPORATED (Exact name of registrant as specified in its charter) Pennsylvania 1-15579 46-4914539 (State or other jurisdiction of incorporation or organiza

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A (Rule 14a-101) INFORMATION REQUIRED IN PROXY STATEMENT SCHEDULE 14A INFORMATION Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A (Rule 14a-101) INFORMATION REQUIRED IN PROXY STATEMENT SCHEDULE 14A INFORMATION Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 Filed by the Registrant ? Filed by a party other than the Registrant ? Check the appropriate box: ? Preliminary Proxy Statement ? Confidential, for Use of

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. )

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: ? Preliminary Proxy Statement ? Confidential, for Use of the Commission Only (as permitted by Rule 14a-6(e)(2)) ? Defin

Change in Accounting Principle Preferability Letter is filed herewith.

EXHIBIT 18 CHANGE IN ACCOUNTING PRINCIPLE PREFERABILITY LETTER February 18, 2022 Board of Directors MSA Safety Incorporated 1000 Cranberry Woods Drive Cranberry Township, PA 16066 Ladies and Gentlemen: Notes 1 and 4 to the consolidated financial statements of MSA Safety Incorporated included in its Form 10-K for the year ended December 31, 2021 describe a change in the method of accounting for inventory valuation from the last-in, first-out (LIFO) method to the first-in, first-out (FIFO) method for certain inventory in the United States.

Affiliates of the registrant is filed herewith.

EXHIBIT 21 MSA SAFETY INCORPORATED SUBSIDIARIES OF THE REGISTRANT DECEMBER 31, 2021 Name State or Other Jurisdiction of Incorporation Compa?ia MSA de Argentina S.

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-K ☒ ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the fiscal year ended December 31, 2021

Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-K ? ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the fiscal year ended December 31, 2021 OR ? TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 FOR THE TRANSITION PERIOD FROM TO Commission File No. 1-15579 MSA SAFETY IN

Financial Statements and Exhibits, Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): February 17, 2022 MSA SAFETY INCORPORATED (Exact name of registrant as specified in its charter) Pennsylvania 1-15579 46-4914539 (State or other jurisdiction of incorporation or organ

Americas International Corporate Consolidated Three Months Ended December 31, 2021 Sales to external customers $ 252,945 $ 157,323 $ — $ 410,268 Operating loss (88,840) Operating margin % (21.7) % Restructuring charges 4,194 Currency exchange losses,

EXHIBIT 99.1 FOR IMMEDIATE RELEASE FROM: MSA Safety Incorporated Ticker: MSA (NYSE) Media Relations Contact: Mark Deasy (412) 559 - 8154 Investor Relations Contact: Chris Hepler (412) 225 - 3717 MSA Safety Announces Fourth Quarter Results Record quarterly revenue driven by acquisitions and strong growth in industrial PPE PITTSBURGH, February 17, 2022 - Global safety equipment manufacturer MSA Safe

MSA / MSA Safety Inc / VANGUARD GROUP INC - SCHEDULE 13G/A Passive Investment

SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Schedule 13G Under the Securities Exchange Act of 1934 (Amendment No.: 9)* Name of issuer: MSA Safety Inc. Title of Class of Securities: Common Stock CUSIP Number: 553498106 Date of Event Which Requires Filing of this Statement: December 31, 2021 Check the appropriate box to designate the rule pursuant to which this Schedule is filed: ??Rul

MSA / MSA Safety Inc / BlackRock Inc. Passive Investment

us5534981064013122.txt SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G Under the Securities Exchange Act of 1934 (Amendment No: 13) MSA SAFETY INCORPORATED - (Name of Issuer) Common Stock - (Title of Class of Securities) 553498106 - (CUSIP Number) December 31, 2021 - (Date of Event Which Requires Filing of this Statement) Check the appropriate box to designate the rule pursu

MSA / MSA Safety Inc / JPMORGAN CHASE & CO - FILING MSA SAFETY INCORPORATED Passive Investment

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G Under the Securities Exchange Act of 1934 (Amendment No. 02)* MSA SAFETY INCORPORATED (Name of Issuer) Common Stock, no par value (Title of Class of Securities) 553498106 (CUSIP Number) December 31, 2021 (Date of Event Which Requires Filing of this Statement) Check the appropriate box to designate the rule pursuan

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q ☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarter ended September 30, 2021 ☐ TRANSITION REPORT PURSUANT TO SECTI

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q ? QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarter ended September 30, 2021 or ? TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Commission File No. 1-15579 MSA SAFETY INCORPORATED (Exact name of registrant as specified in

Financial Statements and Exhibits, Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): October 27, 2021 MSA SAFETY INCORPORATED (Exact name of registrant as specified in its charter) Pennsylvania 1-15579 46-4914539 (State or other jurisdiction of incorporation or organi

Americas International Corporate Consolidated Three Months Ended September 30, 2021 Sales to external customers $ 229,076 $ 111,121 $ — $ 340,197 Operating income 28,961 Operating margin % 8.5 % Restructuring charges 3,853 Currency exchange losses, n

EXHIBIT 99.1 FOR IMMEDIATE RELEASE FROM: MSA Safety Incorporated Ticker: MSA (NYSE) Media Relations Contact: Mark Deasy (412) 559 - 8154 Investor Relations Contact: Chris Hepler (412) 225 - 3717 MSA Safety Announces Third Quarter Results Revenue growth driven by strength in core products and strategic acquisitions PITTSBURGH, October 27, 2021 - Global safety equipment manufacturer MSA Safety Incor

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q ☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarter ended June 30, 2021 ☐ TRANSITION REPORT PURSUANT TO SECTION 13

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q ? QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarter ended June 30, 2021 or ? TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Commission File No. 1-15579 MSA SAFETY INCORPORATED (Exact name of registrant as specified in its

Americas International Corporate Consolidated Three Months Ended June 30, 2021 Sales to external customers $ 217,707 $ 123,582 $ — $ 341,289 Operating income 35,050 Operating margin % 10.3 % Restructuring charges 7,078 Currency exchange losses, net 1

EXHIBIT 99.1 FOR IMMEDIATE RELEASE FROM: MSA Safety Incorporated Ticker: MSA (NYSE) Media Relations Contact: Mark Deasy (412) 559 - 8154 Investor Relations Contact: Elyse Lorenzato (412) 352 -1423 MSA Safety Announces Second Quarter Results Revenue returns to growth and incoming order book gains strong momentum PITTSBURGH, July 28, 2021 - Global safety equipment manufacturer MSA Safety Incorporate

Financial Statements and Exhibits, Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): July 28, 2021 MSA SAFETY INCORPORATED (Exact name of registrant as specified in its charter) Pennsylvania 1-15579 46-4914539 (State or other jurisdiction of incorporation or organizat

Second Amended and Restated Master Note Facility dated as of July 1, 2021 with NYL Investors LLC and the noteholders party thereto*

EX-10.2 3 d125623dex102.htm EX-10.2 Exhibit 10.2 Execution Version MSA SAFETY INCORPORATED $100,000,000 2.69% Series A Senior Notes due July 1, 2036 Up to $200,000,000 (or the equivalent in Applicable Currencies) Private Shelf Facility SECOND AMENDED AND RESTATED MASTER NOTE FACILITY Dated as of July 1, 2021 Table of Contents Page 1. BACKGROUND; AMENDMENT AND RESTATEMENT; CONSENTS 1 1.1. Original

Financial Statements and Exhibits

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K/A (Amendment No. 1) CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): July 1, 2021 MSA SAFETY INCORPORATED (Exact name of registrant as specified in its charter) Pennsylvania 1-15579 46-4914539 (State or other jurisdiction of incorpo

Third Amended and Restated Multi-Currency Note Purchase and Private Shelf Agreement dated July 1, 2021 with PGIM, Inc. and the noteholders party thereto*

Exhibit 10.1 Execution Version MSA SAFETY INCORPORATED $100,000,000 4.00% Amended and Restated Series A Senior Notes due October 13, 2021 ?54,945,054.94 3.40% Series B Senior Notes due January 22, 2031 $100,000,000 2.69% Series C Senior Notes due July 1, 2036 Up to $335,000,000 (or the equivalent in Applicable Currencies) Private Shelf Facility THIRD AMENDED AND RESTATED MULTI-CURRENCY NOTE PURCHA

Financial Statements and Exhibits, Other Events

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): July 1, 2021 MSA SAFETY INCORPORATED (Exact name of registrant as specified in its charter) Pennsylvania 1-15579 46-4914539 (State or other jurisdiction of incorporation or organizati

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EX-99.1 2 bacharachclosingpressrelea.htm EX-99.1 EXHIBIT 99.1 FROM: MSA (MSA Safety Incorporated) Ticker: MSA (NYSE) Media Contact: Mark Deasy – (724) 741-8570 Investor Relations Contact: Elyse Lorenzato – (724) 741-8525 MSA Safety Completes Acquisition of Bacharach, Inc.; A Leader in Heating, Ventilation, Air Conditioning and Refrigeration (HVAC-R) Leak Detection PITTSBURGH, July 1, 2021 – Global

Entry into a Material Definitive Agreement, Creation of a Direct Financial Obligation or an Obligation under an Off-Balance Sheet Arrangement of a Registrant

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): July 1, 2021 MSA SAFETY INCORPORATED (Exact name of registrant as specified in its charter) Pennsylvania 1-15579 46-4914539 (State or other jurisdiction of incorporation or organizati

Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers, Financial Statements and Exhibits

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): June 24, 2021 MSA SAFETY INCORPORATED (Exact name of registrant as specified in its charter) Pennsylvania 1-15579 46-4914539 (State or other jurisdiction of incorporation or organizat

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EXHIBIT 99.1 FROM: MSA (MSA Safety Incorporated) Ticker: MSA (NYSE) Media Contact: Mark Deasy ? (724) 741-8570 Investor Relations Contact: Elyse Lorenzato ? (724) 741-8525 Luca Savi Elected to MSA Safety Board of Directors PITTSBURGH, June 29, 2021 ? The Board of Directors of MSA Safety, Inc. (NYSE: MSA), the global leader in safety products and systems that help protect workers and facility infra

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 11-K (Mark One) x ANNUAL REPORT PURSUANT TO SECTION 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the fiscal year ended December 31, 2020 ¨ TRANSITION REPORT PURSUANT TO

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 11-K (Mark One) x ANNUAL REPORT PURSUANT TO SECTION 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the fiscal year ended December 31, 2020 OR ? TRANSITION REPORT PURSUANT TO SECTION 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission file number 1-15579 A. Full title of the plan and

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM SD SPECIALIZED DISCLOSURE REPORT MSA Safety Incorporated (Exact name of the registrant as specified in its charter) Pennsylvania 1-15579 46-4914539 (State or other jurisdict

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM SD SPECIALIZED DISCLOSURE REPORT MSA Safety Incorporated (Exact name of the registrant as specified in its charter) Pennsylvania 1-15579 46-4914539 (State or other jurisdiction of incorporation or organization) (Commission File Number) (IRS Employer Identification No.) 1000 Cranberry Woods Drive Cranberry Township, Pennsy

Conflict Minerals Report as required by Items 1.01 and 1.02 of this Form.

EX-1.01 2 a2020formsdexhibit-101.htm EX-1.01 EXHIBIT 1.01 Conflict Minerals Report of MSA Safety Incorporated For The Year ended December 31, 2020 I. Introduction This is the Conflict Minerals Report (the "Report") of MSA Safety Incorporated ("MSA", the "company", "we", "us", or "our") for the calendar year ended December 31, 2020. The company has prepared this Report to comply with Rule 13p-1 und

Financial Statements and Exhibits

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K/A (Amendment No. 1) CURRENT REPORT Pursuant to Section 13 or 15(d) of The Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): May 23, 2021 MSA SAFETY INCORPORATED (Exact name of Company as specified in its charter) Pennsylvania 1-15579 46-4914539 (State or other jurisdiction of incorporat

Fourth Amended and Restated Credit Agreement, dated as of May 24, 2021, by and among MSA Safety Incorporated, MSA UK Holdings Limited, MSA Great Britain Holdings Limited, MSA International Holdings B.V., as borrowers, various MSA subsidiaries, as guarantors, various financial institutions, as lenders, and PNC Bank National Association, as administrative agent.*

Exhibit 10.1 Execution Version $900,000,000.00 REVOLVING CREDIT FACILITY FOURTH AMENDED AND RESTATED CREDIT AGREEMENT by and among MSA SAFETY INCORPORATED, a Pennsylvania corporation, THE OTHER BORROWERS PARTY HERETO, THE GUARANTORS PARTY HERETO, THE LENDERS PARTY HERETO, PNC BANK, NATIONAL ASSOCIATION, as Administrative Agent, JPMORGAN CHASE BANK, N.A., as Co-Syndication Agent, BANK OF AMERICA, N

Third Amendment to Second Amended and Restated Multi-Currency Note Purchase and Private Shelf Agreement, dated as of May 24, 2021, by and among MSA Safety Incorporated, each of the guarantors signatory thereto, PGIM, Inc., and each of the noteholders party thereto.*

Exhibit 10.2 Execution Version THIRD AMENDMENT TO SECOND AMENDED AND RESTATED MULTI-CURRENCY NOTE PURCHASE AND PRIVATE SHELF AGREEMENT THIRD AMENDMENT TO SECOND AMENDED AND RESTATED MULTICURRENCY NOTE PURCHASE AND PRIVATE SHELF AGREEMENT, dated as of May 24, 2021 (this ?Agreement?), is among MSA SAFETY INCORPORATED, a Pennsylvania corporation (the ?Company?), each of the Guarantors signatory heret

Entry into a Material Definitive Agreement, Financial Statements and Exhibits, Creation of a Direct Financial Obligation or an Obligation under an Off-Balance Sheet Arrangement of a Registrant, Other Events

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of The Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): May 23, 2021 MSA SAFETY INCORPORATED (Exact name of Company as specified in its charter) Pennsylvania 1-15579 46-4914539 (State or other jurisdiction of incorporation) (Commission Fil

Agreement and Plan of Merger, dated May 23, 2021, by and among MSA Advanced Detection, LLC, a Pennsylvania limited liability company, Cardinal Merger Subsidiary, Inc., a Delaware corporation, MSA Safety Incorporated, a Pennsylvania corporation, Viking Topco, Inc., a Delaware corporation, and Laurel Solutions Holdings LLC, a Delaware limited liability company, solely in its capacity as a representative of the stockholders of Viking Topco, Inc.*

Exhibit 10.1 AGREEMENT AND PLAN OF MERGER AMONG MSA ADVANCED DETECTION, LLC, CARDINAL MERGER SUBSIDIARY, INC., MSA SAFETY INCORPORATED, VIKING TOPCO, INC. AND LAUREL SOLUTIONS HOLDINGS LLC, AS REPRESENTATIVE OF THE COMPANY STOCKHOLDERS MAY 23, 2021 TABLE OF CONTENTS Page ARTICLE I DEFINITIONS 5 1.1 Definitions 5 1.2 Interpretation 21 ARTICLE II THE MERGER 22 2.1 The Merger 22 2.2 Effective Time 22

Form of Support Agreement

Exhibit 10.2 FORM OF SUPPORT AGREEMENT This SUPPORT AGREEMENT (this ?Agreement?) is entered into as of May [?], by and among MSA Advanced Detection, LLC, a Pennsylvania limited liability company (?Parent?), Cardinal Merger Subsidiary, a Delaware corporation (?Merger Sub?), Viking Topco, Inc., a Delaware corporation (the ?Company?), and the holders of capital stock of the Company that are listed on

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FOR IMMEDIATE RELEASE Exhibit 99.1 FROM: MSA (MSA Safety Incorporated) Ticker: MSA (NYSE) Media Contact: Mark Deasy ? (412) 559-8154 Investor Relations Contact: Elyse Lorenzato ? (412) 352-1423 MSA Safety to Expand Gas Detection Business with Acquisition of Bacharach, Inc.; a Leader in Heating, Ventilation, Air Conditioning and Refrigeration (HVAC-R) Leak Detection ? Acquisition will expand MSA?s

Submission of Matters to a Vote of Security Holders

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): May 19, 2021 MSA SAFETY INCORPORATED (Exact name of registrant as specified in its charter) Pennsylvania 1-15579 46-4914539 (State or other jurisdiction of incorporation or organizati

Financial Statements and Exhibits, Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): April 28, 2021 MSA SAFETY INCORPORATED (Exact name of registrant as specified in its charter) Pennsylvania 1-15579 46-4914539 (State or other jurisdiction of incorporation or organiza

Americas International Corporate Consolidated Three Months Ended March 31, 2021 Sales to external customers $ 208,340 $ 100,088 $ — $ 308,428 Operating income 44,038 Operating margin % 14.3 % Restructuring charges 1,308 Currency exchange gains, net (

EXHIBIT 99.1 FOR IMMEDIATE RELEASE FROM: MSA Safety Incorporated Ticker: MSA (NYSE) Media Relations Contact: Mark Deasy (412) 559 - 8154 Investor Relations Contact: Elyse Lorenzato (412) 352 -1423 MSA Safety Announces First Quarter Results PITTSBURGH, April 28, 2021 - Global safety equipment manufacturer MSA Safety Incorporated (NYSE: MSA) today reported results for the first quarter of 2021. Quar

Quarterly Report - 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q ? QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarter ended March 31, 2021 or ? TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Commission File No. 1-15579 MSA SAFETY INCORPORATED (Exact name of registrant as specified in its

- DEF 14A

Table of Contents 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: ? Preliminary Proxy Statement ? Confidential, for Use of the Commission Only (as permitted by Rule 14

- DEFA14A

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: ? Preliminary Proxy Statement ? Confidential, for Use of the Commission Only (as permitted by Rule 14a-6(e)(2)) ? Defin

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G Under the Securities Exchange Act of 1934 (Amendment No. 2) MSA Safety Inc. (Name of Issuer) Common Stock, no par value (Title of Class of Securities) 553498106 (CUSIP Number) February 26, 2021 (Date of Event Which Requires Filing of this Statement) Check the appropriate box to designate the rule pursuant to which

Affiliates of the registrant is filed herewith.

EX-21 2 ex21-2020subsidiarylisting.htm EX-21 EXHIBIT 21 MSA SAFETY INCORPORATED SUBSIDIARIES OF THE REGISTRANT DECEMBER 31, 2020 Name State or Other Jurisdiction of Incorporation Compañia MSA de Argentina S.A. Argentina General Monitors Ireland Limited Ireland General Monitors, Inc. Nevada Globe Holding Company, LLC New Hampshire Latchways plc United Kingdom Mine Safety Appliances Company, LLC Pen

Financial Statements and Exhibits, Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): February 18, 2021 MSA SAFETY INCORPORATED (Exact name of registrant as specified in its charter) Pennsylvania 1-15579 46-4914539 (State or other jurisdiction of incorporation or organ

Annual Report - 10-K

Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-K ? ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the fiscal year ended December 31, 2020 OR ? TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 FOR THE TRANSITION PERIOD FROM TO Commission File No. 1-15579 MSA SAFETY IN

Americas International Corporate Consolidated Three Months Ended December 31, 2020 Sales to external customers $ 244,518 $ 143,730 $ — $ 388,248 Operating income 18,638 Operating margin % 4.8 % Restructuring charges 8,906 Currency exchange losses, ne

EXHIBIT 99.1 FOR IMMEDIATE RELEASE FROM: MSA Safety Incorporated Ticker: MSA (NYSE) Media Relations Contact: Mark Deasy (412) 559 - 8154 Investor Relations Contact: Elyse Lorenzato (412) 352 -1423 MSA Safety Announces Fourth Quarter and Full Year 2020 Results Record quarterly revenue driven by strong performance in fire service business PITTSBURGH, February 18, 2021 - Global safety equipment manuf

SC 13G/A

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 SCHEDULE 13G UNDER THE SECURITIES EXCHANGE ACT OF 1934 EXIT FILING MSA SAFETY INC (NAME OF ISSUER) COMMON STOCK (TITLE OF CLASS OF SECURITIES) 553498106 (CUSIP NUMBER) 12/31/2020 (DATE OF EVENT WHICH REQUIRES FILING OF THIS STATEMENT) CHECK THE APPROPRIATE BOX TO DESIGNATE THE RULE PURSUANT TO WHICH THIS SCHEDULE IS FILED: (X)

SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Schedule 13G Under the Securities Exchange Act of 1934 (Amendment No.: 8)*

SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Schedule 13G Under the Securities Exchange Act of 1934 (Amendment No.: 8)* Name of issuer: MSA Safety Inc. Title of Class of Securities: Common Stock CUSIP Number: 553498106 Date of Event Which Requires Filing of this Statement: December 31, 2020 Check the appropriate box to designate the rule pursuant to which this Schedule is filed: ☒ Rul

SC 13G/A

us5534981064012921.txt SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G Under the Securities Exchange Act of 1934 (Amendment No: 12) MSA SAFETY INCORPORATED - (Name of Issuer) Common Stock - (Title of Class of Securities) 553498106 - (CUSIP Number) December 31, 2020 - (Date of Event Which Requires Filing of this Statement) Check the appropriate box to designate the rule pursu

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G Under the Securities Exchange Act of 1934 (Amendment No. 01)* MSA SAFETY INCORPORATED (Name of Issuer) Common Stock, no par value (Title of Class of Securities) (CUS

Schedule 13G UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G Under the Securities Exchange Act of 1934 (Amendment No. 01)* MSA SAFETY INCORPORATED (Name of Issuer) Common Stock, no par value (Title of Class of Securities) 553498106 (CUSIP Number) December 31, 2020 (Date of Event Which Requires Filing of this Statement) Check the appropriate box to designate the

Financial Statements and Exhibits, Other Events

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): January 25, 2021 MSA SAFETY INCORPORATED (Exact name of registrant as specified in its charter) Pennsylvania 1-15579 46-4914539 (State or other jurisdiction of incorporation or organi

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EXHIBIT 99.1 FROM: MSA (MSA Safety Incorporated) Ticker: MSA (NYSE) Media Contact: Mark Deasy – (412) 559-8154 Investor Relations Contact: Elyse Lorenzato – (412) 352-1423 MSA Safety Acquires U.K. Firefighter Turnout Gear Manufacturer Bristol Uniforms •Acquisition strengthens MSA’s position as a global market leader in fire service personal protective equipment (PPE) products, which include breath

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G Under the Securities Exchange Act of 1934 (Amendment No. 1)* MSA Safety Inc. (Name of Issuer) Common Stock, no par value (Title of Class of Securities) (CUSIP Number

SC 13G/A UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G Under the Securities Exchange Act of 1934 (Amendment No. 1)* MSA Safety Inc. (Name of Issuer) Common Stock, no par value (Title of Class of Securities) 553498106 (CUSIP Number) December 31, 2020 (Date of Event Which Requires Filing of this Statement) Check the appropriate box to designate the rule pursuan

Quarterly Report - 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q ☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarter ended September 30, 2020 or ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Commission File No. 1-15579 MSA SAFETY INCORPORATED (Exact name of registrant as specified in

Financial Statements and Exhibits, Results of Operations and Financial Condition - 8-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): October 28, 2020 MSA SAFETY INCORPORATED (Exact name of registrant as specified in its charter) Pennsylvania 1-15579 46-4914539 (State or other jurisdiction of incorporation or organi

Americas International Corporate Consolidated Three Months Ended September 30, 2020 Sales to external customers $ 194,303 $ 110,089 $ — $ 304,392 Operating income 41,149 Operating margin % 13.5 % Restructuring charges 7,603 Currency exchange losses,

EXHIBIT 99.1 FOR IMMEDIATE RELEASE FROM: MSA Safety Incorporated Ticker: MSA (NYSE) Media Relations Contact: Mark Deasy (412) 559 - 8154 Investor Relations Contact: Elyse Lorenzato (412) 352 -1423 MSA Safety Announces Third Quarter Results PITTSBURGH, October 28, 2020 - Global safety equipment manufacturer MSA Safety Incorporated (NYSE: MSA) today reported results for the third quarter of 2020. Qu

Quarterly Report - 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q ☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarter ended June 30, 2020 or ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Commission File No. 1-15579 MSA SAFETY INCORPORATED (Exact name of registrant as specified in its

Three Months Ended June 30,

EXHIBIT 99.1 FOR IMMEDIATE RELEASE FROM: MSA Safety Incorporated Ticker: MSA (NYSE) Media Relations Contact: Mark Deasy (412) 559 - 8154 Investor Relations Contact: Elyse Lorenzato (412) 352 -1423 MSA Safety Announces Second Quarter Results Strong execution and a resilient business model provide support in a challenging environment PITTSBURGH, July 29, 2020 - Global safety equipment manufacturer M

Financial Statements and Exhibits, Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): July 29, 2020 MSA SAFETY INCORPORATED (Exact name of registrant as specified in its charter) Pennsylvania 1-15579 46-4914539 (State or other jurisdiction of incorporation or organizat

- 11-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 11-K (Mark One) x ANNUAL REPORT PURSUANT TO SECTION 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the fiscal year ended December 31, 2019 OR ¨ TRANSITION REPORT PURSUANT TO SECTION 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission file number 1-15579 A. Full title of the plan and

Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): June 21, 2020 MSA SAFETY INCORPORATED (Exact name of registrant as specified in its charter) Pennsylvania 1-15579 46-4914539 (State or other jurisdiction of incorporation or organizat

Conflict Minerals Report as required by Items 1.01 and 1.02 of this Form.

EXHIBIT 1.01 Conflict Minerals Report of MSA Safety Incorporated For The Year ended December 31, 2019 I. Introduction This is the Conflict Minerals Report (the “Report”) of MSA Safety Incorporated (“MSA”, the “company”, “we”, “us”, or “our”) for the calendar year ended December 31, 2019. The company has prepared this Report to comply with Rule 13p-1 under the Securities Exchange Act of 1934, as am

- SD

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM SD SPECIALIZED DISCLOSURE REPORT MSA Safety Incorporated (Exact name of the registrant as specified in its charter) Pennsylvania 1-15579 46-4914539 (State or other jurisdiction of incorporation or organization) (Commission File Number) (IRS Employer Identification No.) 1000 Cranberry Woods Drive Cranberry Township, Pennsy

Submission of Matters to a Vote of Security Holders

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): May 12, 2020 MSA SAFETY INCORPORATED (Exact name of registrant as specified in its charter) Pennsylvania 1-15579 46-4914539 (State or other jurisdiction of incorporation or organizati

Financial Statements and Exhibits, Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): April 29, 2020 MSA SAFETY INCORPORATED (Exact name of registrant as specified in its charter) Pennsylvania 1-15579 46-4914539 (State or other jurisdiction of incorporation or organiza

Quarterly Report - 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q ☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarter ended March 31, 2020 or ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Commission File No. 1-15579 MSA SAFETY INCORPORATED (Exact name of registrant as specified in its

Three Months Ended March 31,

1 FOR IMMEDIATE RELEASE FROM: MSA Safety Incorporated Ticker: MSA (NYSE) Media Relations Contact: Mark Deasy (412) 559 - 8154 Investor Relations Contact: Elyse Lorenzato (412) 352 -1423 MSA Safety Announces Strong First Quarter Results Revenue growth, healthy order activity, and operating margin expansion provide a solid foundation to start the year PITTSBURGH, April 29, 2020 - Global safety equipment manufacturer MSA Safety Incorporated (NYSE: MSA) today reported results for the first quarter of 2020.

MSA / MSA Safety Inc. DEF 14A - - DEF 14A

DEF 14A Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.

Financial Statements and Exhibits, Other Events

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): March 19, 2020 MSA SAFETY INCORPORATED (Exact name of registrant as specified in its charter) Pennsylvania 1-15579 46-4914539 (State or other jurisdiction of incorporation or organiza

Exhibit 99.1 Item 1A. Risk Factors

Exhibit 99.1 Item 1A. Risk Factors Pandemics or disease outbreaks, such as COVID-19, may cause unfavorable economic or market conditions which could impact demand patterns and/or disrupt global supply chains and manufacturing operations. Collectively, these outcomes could materially and adversely affect our business, results of operations and financial condition. Pandemics or disease outbreaks suc

MNESP / MSA Safety Inc. / APG Asset Management US Inc. - 13G FILED BY APG ASSET MGMT FOR ISSUER MSA SAFETY, INC., DATED 3.17.2020 Passive Investment

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G Under the Securities Exchange Act of 1934 (Amendment No. ) MSA Safety Inc. (Name of Issuer) Common Stock, no par value (Title of Class of Securities) 553498106 (CUSIP Number) March 13, 2020 (Date of Event Which Requires Filing of this Statement) Check the appropriate box to designate the rule pursuant to which thi

Other Events

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): March 12, 2020 MSA SAFETY INCORPORATED (Exact name of registrant as specified in its charter) Pennsylvania 1-15579 46-4914539 (State or other jurisdiction of incorporation or organiza

Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): February 26, 2020 MSA SAFETY INCORPORATED (Exact name of registrant as specified in its charter) Pennsylvania 1-15579 46-4914539 (State or other jurisdiction of incorporation or organ

Description of MSA Safety Incorporated Securities Registered under Section 12 of the Securities Exchange Act of 1934, as amended, filed as Exhibit 4(d) to Form 10-K on February 20, 2020, is incorporated herein by reference.

EXHIBIT 4(d) Description of Securities Registered Under Section 12 of the Securities Exchange Act of 1934, as amended As of December 31, 2019, the only class of securities registered under Section 12 of the Securities Exchange Act of 1934, as amended (the “Exchange Act”) by MSA Safety Incorporated (the “Company,” “MSA,” “we,” “us,” and “our”) was our common stock, without par value.

Three Months Ended

1 FOR IMMEDIATE RELEASE FROM: MSA Safety Incorporated Ticker: MSA (NYSE) Media Relations Contact: Mark Deasy (724) 741 - 8570 Investor Relations Contact: Elyse Lorenzato (724) 741 - 8525 MSA Announces Fourth Quarter and Full Year 2019 Results Record revenue driven by momentum of new products; MSA delivers mid-single digit revenue growth and strong operating margin expansion for the full year of 2019 PITTSBURGH, February 19, 2020 - Global safety equipment manufacturer MSA Safety Incorporated (NYSE: MSA) today reported results for the fourth quarter and full year of 2019.

Annual Report - 10-K

Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-K ☒ ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the fiscal year ended December 31, 2019 OR ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 FOR THE TRANSITION PERIOD FROM TO Commission File No. 1-15579 MSA SAFETY IN

Affiliates of the registrant is filed herewith.

EXHIBIT 21 MSA SAFETY INCORPORATED SUBSIDIARIES OF THE REGISTRANT DECEMBER 31, 2019 Name State or Other Jurisdiction of Incorporation Compañia MSA de Argentina S.

Financial Statements and Exhibits, Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): February 19, 2020 MSA SAFETY INCORPORATED (Exact name of registrant as specified in its charter) Pennsylvania 1-15579 46-4914539 (State or other jurisdiction of incorporation or organ

MNESP / MSA Safety Inc. / STATE STREET CORP Passive Investment

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 SCHEDULE 13G UNDER THE SECURITIES EXCHANGE ACT OF 1934 ANNUAL FILING MSA Safety Inc (NAME OF ISSUER) Common Stock (TITLE OF CLASS OF SECURITIES) 553498106 (CUSIP NUMBER) 12/31/2019 (DATE OF EVENT WHICH REQUIRES FILING OF THIS STATEMENT) CHECK THE APPROPRIATE BOX TO DESIGNATE THE RULE PURSUANT TO WHICH THIS SCHEDULE IS FILED: (

MNESP / MSA Safety Inc. / VANGUARD GROUP INC - SCHEDULE 13G/A Passive Investment

SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Schedule 13G Under the Securities Exchange Act of 1934 (Amendment No.: 7)* Name of issuer: MSA Safety Inc Title of Class of Securities: Common Stock CUSIP Number: 553498106 Date of Event Which Requires Filing of this Statement: December 31, 2019 Check the appropriate box to designate the rule pursuant to which this Schedule is filed: ☒ Rule

MNESP / MSA Safety Inc. / BlackRock Inc. Passive Investment

us5534981064020320.txt SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G Under the Securities Exchange Act of 1934 (Amendment No: 11) MSA SAFETY INCORPORATED - (Name of Issuer) Common Stock - (Title of Class of Securities) 553498106 - (CUSIP Number) December 31, 2019 - (Date of Event Which Requires Filing of this Statement) Check the appropriate box to designate the rule pursu

MNESP / MSA Safety Inc. / JP Morgan Chase & Co - FILING MSA SAFETY INCORPORATED Passive Investment

Schedule 13G UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G Under the Securities Exchange Act of 1934 (Amendment No. )* MSA SAFETY INCORPORATED (Name of Issuer) Common Stock, no par value (Title of Class of Securities) 553498106 (CUSIP Number) December 31, 2019 (Date of Event Which Requires Filing of this Statement) Check the appropriate box to designate the r

Quarterly Report - 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q ☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarter ended September 30, 2019 or ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Commission File No. 1-15579 MSA SAFETY INCORPORATED (Exact name of registrant as specified in