X0306 4 2020-12-07 0000066570 MSA Safety Inc MSA 0001187330 LAMBERT WILLIAM M 1000 CRANBERRY WOODS DRIVE CRANBERRY WOODS TOWNSHIP PA 16066 1 Common Stock, no par value 2020-12-07 4 M 0 37324.0000 51.6900 A 47820.0000 D Common Stock, no par value 2020-12-07 4 S 0 1233.0000 153.2697 D 46587.0000 D Common Stock, no par value 2020-12-07 4 S 0 1743.0000 152.4630 D 44844.0000 D Common Stock, no par value 2020-12-07 4 S 0 27982.0000 151.2118 D 16862.0000 D Common Stock, no par value 2020-12-08 4 M 0 7275.0000 51.6900 A 24137.0000 D Common Stock, no par value 2020-12-08 4 S 0 2229.0000 152.2178 D 21908.0000 D Common Stock, no par value 2020-12-08 4 S 0 5046.0000 151.7052 D 16862.0000 D Common Stock, no par value 70000.0000 I By GRAT (Wife) Common Stock, no par value 2100.0000 I By Wife Non-statutory Stock Option 51.6900 2020-12-07 4 M 0 37324.0000 51.6900 D 2017-02-26 2024-02-26 Common Stock, no par value 37324.0000 7275.0000 D Non-statutory Stock Option 51.6900 2020-12-08 4 M 0 7275.0000 51.6900 D 2017-02-26 2024-02-26 Common Stock, no par value 7275.0000 0.0000 D Share price on this transaction ranged from $153.020 to $153.370. Share price on this transaction ranged from $152.00 to $152.940. Share price on this transaction ranged from $151.00 to $151.930. Share price on this transaction ranged from $152.00 to $152.650. Share price on this transaction ranged from $151.090 to $151.970. These shares were previously reported as indirectly owned by Wife but were contributed to a Grantor Retained Annuity Trust (Wife) on November 27, 2020. Stephanie L. Sciullo, Attorney in fact 2020-12-09