X0508 4 2024-05-21 0 0000701288 ATRION CORP ATRI 0001085535 STUPP JOHN P JR STUPP JOHN P JR #18 ST. ANDREWS DR. ST LOUIS MO 63124 1 0 0 0 0 Deferred Stock Unit 2024-05-21 4 A 0 311 0 A common stock 311 872 D Each deferred stock unit was awarded under the Atrion Corporation 2021 Equity Incentive Plan and in accordance with the Issuers Director Compensation Program and represents the right to receive one share of common stock of the Issuer. The deferral period for the deferred stock units lapses on January 1, 2030 or such earlier date as set forth in the award agreement and will be settled in shares of the Issuer's common stock. Includes 561 stock units previously credited to the reporting person's stock unit account as a result of his deferral of cash fees pursuant to the issuer's Non-Employee Director Deferred Compensation Plan. /s/Cindy Ferguson, Attorney-in-fact 2024-05-23