X0206 3 2024-10-29 0 0000094049 STEPAN CO SCL 0002043570 Hinrichsen Samuel S 1101 SKOKIE BLVD, SUITE 500 NORTHBROOK IL 60062 1 VP & Interim CFO Common Stock 189.3615 D Common Stock 317.522 I By ESOP II Trust Performance Shares Common Stock 180 D Restricted Stock Units 2022-12-31 2024-12-31 Restricted Stock Units 180 D Stock Appreciation Right 111.26 2022-12-31 2032-02-15 Common Stock 560 D Restricted Stock Units 2024-02-14 2026-02-14 Restricted Stock Units 136 D Stock Appreciation Right 109.92 2024-02-14 2033-02-13 Common Stock 380 D Performance Shares Common Stock 343 D Restricted Stock Units 2025-03-04 2027-03-04 Restricted Stock Units 171 D Stock Appreciation Right 87.50 2025-03-04 2034-03-03 Common Stock 468 D Share Units Common Stock 105.94 D The performance shares vest upon the certification of Stepan Company achieving certain performance goals for the performance period ending December 31, 2024. Each performance share represents a contingent right to receive one share of Stepan Company common stock. Vests ratably over three years beginning on the date shown. Each restricted stock unit ("RSU") 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, 2026. Share Units are acquired under the Management Incentive Plan (as amended) ("MIP"), a nonqualified deferred compensation plan that allows participants to elect to defer all or a portion of their annual incentive awards into Stepan Company Common Stock. Share Units convert on a one-for-one basis into Common Stock. /s/ Stephanie J. Pacitti, attorney-in-fact for Samuel S. Hinrichsen 2024-11-08