X0609 4 2026-04-13 0000094049 STEPAN CO SCL 0002124351 Weitkamp Robin Joseph false 1101 SKOKIE BLVD, SUITE 500 NORTHBROOK IL 60062 1 VP and GM Surfactants-INT 0 Restricted Stock Units 2026-04-13 4 A 0 2859 0 A 2027-04-13 2029-04-13 Restricted Stock Units 2859 2859 D Stock Appreciation Right 52.46 2026-04-13 4 A 0 4030 0 A 2027-04-13 2036-04-13 Common Stock 4030 4030 D Performance Shares 2026-04-13 4 A 0 1429 0 A Common Stock 1429 1429 D Each restricted stock unit ("RSU") represents a contingent right to receive one share of Stepan Company common stock. Vests ratably over three years beginning on the date shown. Each performance share represents a contingent right to receive one share of Stepan Company common stock. The performance shares vest upon the certification of Stepan Company achieving certain performance goals for the performance period ending December 31, 2028. /s/ James A. Hart, attorney-in-fact for Mr. Robin J. Weitkamp 2026-04-15