EX-10.4 4 tse-20150630ex104bf6599.htm EX-10.4 tse_EX_10-4

Exhibit 10.4


Picture 1


Trinseo LLC

1000 Chesterbrook Blvd.

Suite 300

Berwyn, PA 19312




May 11, 2015



Ms. Marilyn Horner




Dear Ms. Horner:


RE:  Definition of Retirement for Purposes of Equity Awards under 2014 Omnibus Incentive Plan



This letter confirms that the following definition of "Retirement” is applicable to the Stock Options granted to you on February 27, 2015:


"Retirement means a retirement from active Employment after the Optionee has attained age fifty-five (55) with at least six (6) years of continuous service with the Company.


This letter confirms that the following definition of "Retirement" is applicable to the Restricted Stock

Units granted to you on February 27, 2015:


"Retirement" means a retirement from active Employment after the Grantee has attained age fifty-five (55) with at least six (6) years of continuous service with the Company.





Trinseo S.A.












/s/ Christopher D. Pappas


Name: Christopher D. Pappas


Title: Chief Executive Officer and President