0001306830-23-000031 4 1 20230228 20230302 20230302 McGilvray Aaron M 0001917582 4 34 001-32410 23700261 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_167779531622635.xml FORM 4 X0306 4 2023-02-28 0 0001306830 Celanese Corp CE 0001917582 McGilvray Aaron M 222 W LAS COLINAS BLVD SUITE 900N IRVING TX 75039 0 1 0 0 Chief Accounting Officer Nonqualified Stock Option (right to buy) 116.93 2023-02-28 4 A 0 1155 0 A 2033-02-27 Common Stock 1155.0 1155 D Time-based employee stock options granted under the Company's 2018 Global Incentive Plan. The options vest and become exercisable, subject to continued employment, in three annual installments of 33%, 33% and 34% beginning February 15, 2024. /s/ Michael R. Sullivan, Attorney-in-Fact for Aaron M. McGilvray 2023-03-02