0001306830-24-000115 4 1 20240513 20240514 20240514 IHLENFELD JAY V 0001205395 4 34 001-32410 24945873 Celanese Corp 0001306830 2820 08 Industrial Applications and Services 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 wk-form4_1715721903.xml FORM 4 X0508 4 2024-05-13 0 0001306830 Celanese Corp CE 0001205395 IHLENFELD JAY V C/O CELANESE CORPORATION 222 W. LAS COLINAS BLVD., SUITE 900N IRVING TX 75039-5421 1 0 0 0 0 Phantom Stock 2024-05-13 4 A 0 43.745 160.24 A Common Stock 43.745 10057.612 D Each share of phantom stock represents the right to receive one share of Common Stock. The reported phantom stock represents dividend equivalents on compensation deferred under the Company's 2008 Deferred Compensation Plan (the "Plan"). The shares of phantom stock become payable in shares of Common Stock, as provided in the Plan, following the termination of the reporting person's service as a director of the Company. /s/ Adam R. Santosuosso, Attorney-in-Fact for Jay V. Ihlenfeld 2024-05-14