X0306 4 2017-12-15 0000094049 STEPAN CO SCL 0001603410 Mergner Arthur W 22 W. FRONTAGE ROAD NORTHFIELD IL 60093 1 VP, Supply Chain Common Stock 2017-12-15 4 A 0 4.114 79.84 A 2963.939 D Common Stock 6166.414 I By Esop II Trust Share Units 2017-12-15 4 A 0 12.929 79.84 A Common Stock 12.929 4600.593 D This holding is re-reported solely to gain access to the electronic filing system to file this amendment, and the sole purpose of the amendment is to add the Power of Attorney that was inadvertently omitted from the original filing. 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. /s/ Matthew M. Rice, attorney-in-fact for Arthur W. Mergner 2017-12-19