X0508 4 2024-03-08 0000094049 STEPAN CO SCL 0001738439 Rojo Luis 1101 SKOKIE BOULEVARD, SUITE 500 NORTHBROOK IL 60062 1 VP & Chief Financial Officer 0 Common Stock 2024-03-08 4 F 0 445 87.53 D 8041.375 D The transaction reported reflects the withholding of shares from the performance shares vested on February 15, 2024. Withholding of these shares was applied to the reporting person's account on the transaction date shown. /s/ Stephanie J. Pacitti, Attorney-in-Fact for Luis Rojo 2024-03-11