0001306830-24-000111 4 1 20240512 20240514 20240514 Koenig Michael 0001911096 4 34 001-32410 24945811 222 W. LAS COLINAS BLVD. SUITE 900N IRVING TX 75039 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_1715721648.xml FORM 4 X0508 4 2024-05-12 0 0001306830 Celanese Corp CE 0001911096 Koenig Michael C/O CELANESE CORPORATION W. LAS COLINAS BLVD., SUITE 900N IRVING TX 75039 1 0 0 0 0 Common Stock 2024-05-12 4 F 0 534 159.07 D 2203 D Shares withheld for the payment of taxes on the vesting and settlement of previously reported time-based restricted stock units. /s/ Adam R. Santosuosso, Attorney-in-Fact for Michael Koenig 2024-05-14