Investor Contacts

Chuck Kyrish
Vice President, Treasury and Investor Relations

+1-972-443-4574
chuck.kyrish@celanese.com

Brandon Ayache
Director, Investor Relations

+1-972-443-8509
brandon.ayache@celanese.com

Cheryl Mahon
Executive Assistant, Investor Relations

+1-972-443-3728
cheryl.mahon@celanese.com

Stock Transfer Agent / Stockholder Services:
Computershare Investor Services

P.O. Box 43078
Providence, RI 02940-3078
Tel. +1-781-575-3400
http://www.computershare.com