Ownership Submission
FORM 4
Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).
UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP OF SECURITIES

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934, Section 17(a) of the Public Utility Holding Company Act of 1935 or Section 30(h) of the Investment Company Act of 1940
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(Print or Type Responses)
1. Name and Address of Reporting Person *
STEPAN F QUINN JR
   2. Issuer Name and Ticker or Trading Symbol
STEPAN CO [SCL] 		5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)
__X__ Director _____ 10% Owner
__X__ Officer (give title below) _____ Other (specify below)
Chairman, President & CEO
(Last)
(First)
(Middle)
22 W. FRONTAGE ROAD		 3. Date of Earliest Transaction (Month/Day/Year)
03/02/2018
(Street)

NORTHFIELD, IL 60093		 4. If Amendment, Date Original Filed(Month/Day/Year)
 6. Individual or Joint/Group Filing(Check Applicable Line)
_X_ Form filed by One Reporting Person
___ Form filed by More than One Reporting Person
(City)
(State)
(Zip)
Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1.Title of Security
(Instr. 3)		 2. Transaction Date (Month/Day/Year) 2A. Deemed Execution Date, if any (Month/Day/Year) 3. Transaction Code
(Instr. 8)		 4. Securities Acquired (A) or Disposed of (D)
(Instr. 3, 4 and 5)		 5. Amount of Securities Beneficially Owned Following Reported Transaction(s)
(Instr. 3 and 4)		 6. Ownership Form: Direct (D) or Indirect (I)
(Instr. 4)		 7. Nature of Indirect Beneficial Ownership
(Instr. 4)
Code V Amount (A) or (D) Price
Common Stock 03/02/2018   G V 11,834 D $ 0 108,608 (1) D (2)  
Common Stock 03/02/2018   M   10,000 A $ 37.51 163,404.634 (1) D  
Common Stock 03/02/2018   S   10,000 D $ 79.814 (3) 153,404.634 D  
Common Stock 03/06/2018   G V 1,936 D $ 0 106,672 D (2)  
Common Stock 03/05/2018   M   10,000 A $ 37.51 163,404.634 D  
Common Stock 03/05/2018   S   5,000 D $ 80.952 (4) 158,404.634 D  
Common Stock 03/05/2018   S   4,472 D $ 81.814 (5) 153,932.634 D  
Common Stock 03/05/2018   S   528 D $ 82.705 (6) 153,404.634 D  
Common Stock 03/06/2018   M   10,000 A $ 37.51 163,404.634 D  
Common Stock 03/06/2018   S   10,000 D $ 82.689 (7) 153,404.634 D  
Common Stock 03/06/2018   M   5,766 A $ 37.51 159,170.634 D  
Common Stock 03/06/2018   S   5,766 D $ 83.784 (8) 153,404.634 D  
Common Stock               11,066.432 I By Esop II Trust
Common Stock               160,000 I By Family LLC (9)
Common Stock               48,000 I By Family Trust (9)
Common Stock               54,978 I By Family Trust III
Common Stock               40,000 I By Family Trust IV (9)
Common Stock               0 (1) I By Spouse
Common Stock               401,210 I Member Of Plan Committee Of Stepan Company

Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
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Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned
(e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security
(Instr. 3)		 2. Conversion or Exercise Price of Derivative Security 3. Transaction Date (Month/Day/Year) 3A. Deemed Execution Date, if any (Month/Day/Year) 4. Transaction Code
(Instr. 8)		 5. Number of Derivative Securities Acquired (A) or Disposed of (D)
(Instr. 3, 4, and 5)		 6. Date Exercisable and Expiration Date
(Month/Day/Year)		 7. Title and Amount of Underlying Securities
(Instr. 3 and 4)		 8. Price of Derivative Security
(Instr. 5)		 9. Number of Derivative Securities Beneficially Owned Following Reported Transaction(s)
(Instr. 4)		 10. Ownership Form of Derivative Security: Direct (D) or Indirect (I)
(Instr. 4)		 11. Nature of Indirect Beneficial Ownership
(Instr. 4)
Code V (A) (D) Date Exercisable Expiration Date Title Amount or Number of Shares
Employee Stock Option (Right to Buy) $ 37.51 03/02/2018   M     10,000 02/07/2013 02/06/2019 Common Stock 10,000 $ 0 25,766 D  
Employee Stock Option (Right to Buy) $ 37.51 03/05/2018   M     10,000 02/07/2013 02/06/2019 Common Stock 10,000 $ 0 15,766 D  
Employee Stock Option (Right to Buy) $ 37.51 03/06/2018   M     15,766 02/07/2013 02/06/2019 Common Stock 15,766 $ 0 0 D  

Reporting Owners

Reporting Owner Name / Address Relationships
 Director  10% Owner  Officer  Other
STEPAN F QUINN JR
22 W. FRONTAGE ROAD
NORTHFIELD, IL 60093		   X     Chairman, President & CEO  

Signatures

 /s/ Matthew M. Rice, attorney-in-fact for F. Quinn Stepan, Jr.   03/06/2018
**Signature of Reporting Person Date

Explanation of Responses:

* If the form is filed by more than one reporting person, see Instruction 4(b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations. See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
(1) Prior to the gift transfer, the reporting person and his spouse transferred 15,074 shares of Common Stock and 945 shares of Common Stock, respectively, from their individual accounts into their Joint Tenancy account.
(2) Joint Tenancy with Spouse.
(3) The price reported is a weighted average price. Shares were sold in a series of transactions within the same trading day at prices ranging from $79.62 to $80.06, inclusive. Full information regarding the number of shares sold at each separate price is available upon request by the Commission staff, the issuer, or a security holder of the issuer.
(4) The price reported is a weighted average price. Shares were sold in a series of transactions within the same trading day at prices ranging from $80.47 to $81.08, inclusive. Full information regarding the number of shares sold at each separate price is available upon request by the Commission staff, the issuer, or a security holder of the issuer.
(5) The price reported is a weighted average price. Shares were sold in a series of transactions within the same trading day at prices ranging from $81.50 to $82.37, inclusive. Full information regarding the number of shares sold at each separate price is available upon request by the Commission staff, the issuer, or a security holder of the issuer.
(6) The price reported is a weighted average price. Shares were sold in a series of transactions within the same trading day at prices ranging from $82.55 to $82.735, inclusive. Full information regarding the number of shares sold at each separate price is available upon request by the Commission staff, the issuer, or a security holder of the issuer.
(7) The price reported is a weighted average price. Shares were sold in a series of transactions within the same trading day at prices ranging from $82.29 to $83.25, inclusive. Full information regarding the number of shares sold at each separate price is available upon request by the Commission staff, the issuer, or a security holder of the issuer.
(8) The price reported is a weighted average price. Shares were sold in a series of transactions within the same trading day at prices ranging from $83.39 to $84.108, inclusive. Full information regarding the number of shares sold at each separate price is available upon request by the Commission staff, the issuer, or a security holder of the issuer.
(9) The Reporting Person disclaims beneficial ownership of these securities, and this report shall not be deemed an admission that the Reporting Person is the beneficial owner of such securities for the purpose of Section 16 or for any other purpose.

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