Other Information
−Removed: During the three months ended March 31, 2026, no director or officer of the Company, nor the Company itself, adopted or terminated a “Rule 10b5-1 trading arrangement” or “non-Rule 10b5-1 trading arrangement,” as each term is defined in Item 408(a) of Regulation S-K.
+Added: During the three months ended June 30, 2026, no director or officer of the Company, nor the Company itself, adopted or terminated a “Rule 10b5-1 trading arrangement” or “non-Rule 10b5-1 trading arrangement,” as each term is defined in Item 408(a) of Regulation S-K.
31.1 Certification of Chief Executive Officer pursuant to Rule 13a-14(a)
10 unchanged sentences
MSA SAFETY INCORPORATED
−Removed: May 5, 2026 /s/ Julie A.
+Added: July 31, 2026 /s/ Julie A.
Senior Vice President, Chief Financial Officer and Treasurer (Principal Financial Officer)
2 unchanged sentences
Compared sentence by sentence after normalising whitespace, quotation marks, case and digits, so re-formatting and restated figures do not read as changed language. Wording changes appear as one removal and one addition. The current filing and the prior one are authoritative.