X0508 4 2025-03-03 0000094049 STEPAN CO SCL 0001738439 Rojo Luis 1101 SKOKIE BOULEVARD, SUITE 500 NORTHBROOK IL 60062 1 1 President & CEO 0 Common Stock 2025-03-04 4 M 0 857 57.275 A 12001.901 D Common Stock 2025-03-04 4 F 0 252 57.275 D 11749.901 D Common Stock 511.83 I By Esop II Trust Share Units Common Stock 2329.19 2329.19 D Performance Shares 2025-03-03 4 A 0 26729 0 A Common Stock 26729 26729 D Restricted Stock Units 2025-03-03 4 A 0 13365 0 A 2026-03-03 2028-03-03 Common Stock 13365 13365 D Stock Appreciation Right 59.86 2025-03-03 4 A 0 37736 0 A 2026-03-03 2035-03-03 Common Stock 37736 37736 D Restricted Stock Units 2025-03-04 4 M 0 857 0 D 2025-03-04 2027-03-04 Restricted Stock Units 857 1715 D The restricted stock units ("RSUs") were settled in shares of common stock per the terms of the award. Withholding of shares to satisfy tax liability on the vesting of RSUs. Share units convert on a one-for-one basis into Common Stock. Share units are acquired under the Management Incentive Plan (As Amended and Restated Effective January 1, 2015) ("MIP"), a nonqualified deferred compensation plan which allows MIP participants to elect to defer all or a portion of their deferred compensation into accounts pursuant to MIP provisions. 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, 2027. Each RSU represents a contingent right to receive one share of Stepan Company common stock. Vest ratably over three years beginning on the date shown. /s/ Stephanie J. Pacitti, Attorney-in-Fact for Luis Rojo 2025-03-05