0001306830-21-000048 4 1 20210215 20210217 20210217 Ryerkerk Lori 0001449522 4 34 001-32410 21645830 AXALTA COATING SYSTEMS LTD. 2001 MARKET STREET, SUITE 3600 PHILADELPHIA PA 19103 Celanese Corp 0001306830 2820 980420726 DE 1231 222 W. LAS COLINAS BLVD., SUITE 900N IRVING TX 75039-5421 972-443-4000 222 W. LAS COLINAS BLVD., SUITE 900N IRVING TX 75039-5421 Celanese CORP 20041102 Blackstone Crystal Holdings Capital Partners (Cayman) IV Ltd. 20041022 4 1 wf-form4_161359929606154.xml FORM 4 X0306 4 2021-02-15 0 0001306830 Celanese Corp CE 0001449522 Ryerkerk Lori C/O CELANESE CORPORATION 222 W LAS COLINAS BLVD, STE 900N IRVING TX 76039 1 1 0 0 Chairman and CEO Common Stock 2021-02-15 4 F 0 1740 131.65 D 44817 D Shares withheld for the payment of taxes on the vesting of time-based restricted stock units. /s/ Adam R. Santosuosso, Attorney-in-Fact for Lori Ryerkerk 2021-02-17