Exhibit 10.4

 

Picture 1 [tse-20150630ex104bf6599g001.jpg]

 

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.

 

 

 

 

 

 

 

 

 

By:

  

/s/ Christopher D. Pappas

 

Name: Christopher D. Pappas

 

Title: Chief Executive Officer and President

 

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