X0304 4 2011-10-14 0 0001306830 Celanese CORP CE 0001340482 Sterin Steven C/O CELANESE CORPORATION 1601 W. LBJ FREEWAY DALLAS TX 75234 0 1 0 0 SVP & CFO Series A Common Stock 2011-10-14 4 A 0 17060 0 A 45530 D Series A Common Stock 2011-10-14 4 F 0 5666 40.30 D 39864 D Series A Common Stock 1022.80 I By 401(k) Plan Represents vesting and settlement of performance-based restricted stock units granted to the reporting person on December 11, 2008 under the Company's 2004 Stock Incentive Plan. Shares withheld for the payment of taxes on the vesting and settlement of the performance-based restricted stock units. Represents equivalent shares of Series A Common Stock held by the reporting person under the Celanese Americas Retirement Savings Plan as of September 30, 2011. /s/ James R. Peacock III, Attorney-in-Fact for Steven Sterin 2011-10-17