STEPAN CO — Director's Dealing 2006

May 5, 2006

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: STEPAN CO (SCL)
CIK: 0000094049
Period of Report: 2006-05-04

Reporting Person: STEPAN F QUINN JR (Director, President & CEO)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2006-05-04	Common Stock	S	100	$30.87	Disposed	67170.2262	Direct
2006-05-04	Common Stock	S	100	$30.80	Disposed	67070.2262	Direct
2006-05-04	Common Stock	S	500	$30.70	Disposed	66570.2262	Direct
2006-05-04	Common Stock	S	100	$30.60	Disposed	66470.2262	Direct
2006-05-04	Common Stock	S	4200	$30.50	Disposed	62270.2262	Direct
2006-05-04	Common Stock	S	100	$30.85	Disposed	62170.2262	Direct
2006-05-04	Common Stock	S	1600	$30.67	Disposed	60570.2262	Direct
2006-05-04	Common Stock	S	800	$30.57	Disposed	59770.2262	Direct