Buck Jonathan D. 4/A

What Happened
Jonathan D. Buck, Chief Accounting Officer of MSA Safety Inc. (MSA), was awarded 1,100 shares classified as an acquisition via award (PSUs) on March 8, 2026. The award was reported at $0.00 per share (a grant, not a market purchase), so the immediate reported cash value is $0. This Form 4 is an amendment correcting the number of performance-based shares originally reported.

Key Details

• Transaction date: 2026-03-08; Form 4 filed (amended) on 2026-03-10.
• Transaction type/code: A — Grant/award (performance stock units).
• Shares granted: 1,100; reported price: $0.00 (grant).
• Shares owned after transaction: the amended Form 4 corrects the previously reported beneficial ownership count; consult the amended filing for the updated total.
• Footnote: F1 states the amendment corrects an administrative error in the originally reported PSU amount and updates the post-transaction beneficial ownership number accordingly.
• Timeliness: The amended Form 4 was filed two days after the report date; the filing amends—not late per se—an earlier report to fix the count.

Context
Performance stock units are grants that typically vest based on time and/or performance goals and do not represent immediately tradeable purchases. A $0.00 per-share amount on a Form 4 indicates an award/grant rather than a market buy; it does not imply immediate cash paid or sale proceeds. For the exact vesting terms or potential future value, review MSA’s proxy/compensation disclosures or the company’s equity award plans.