0001306830-22-000167 4 1 20220815 20220817 20220817 Richardson Scott A 0001731988 4 34 001-32410 221175467 C/O CELANESE CORPORATION 222 W LAS COLINAS BLVD, SUITE 900N IRVING TX 75039 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_166077184318537.xml FORM 4 X0306 4 2022-08-15 0 0001306830 Celanese Corp CE 0001731988 Richardson Scott A C/O CELANESE CORPORATION 222 W LAS COLINAS BLVD., SUITE 900N IRVING TX 75039 0 1 0 0 EVP & CFO Common Stock 2022-08-15 4 A 0 10364 0 A 59127.703 D Common Stock 2022-08-15 4 F 0 4079 116.11 D 55048.703 D Common Stock 565.10 I by 401(k) Plan Represents performance-based restricted stock units ("PRSUs") granted to the reporting person on February 10, 2021 under the Company's 2018 Global Incentive Plan which have vested and been settled. Shares withheld for the payment of taxes on the vesting and settlement of PRSUs. /s/ Adam R. Santosuosso, Attorney-in-Fact for Scott A. Richardson 2022-08-17