0001306830-21-000165 4 1 20210804 20210806 20210806 Richardson Scott A 0001731988 4 34 001-32410 211153065 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_162828087069108.xml FORM 4 X0306 4 2021-08-04 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 2021-08-04 4 G 0 1580 0 D 34558.703 D Common Stock 554.257 I by 401(k) Plan /s/ Adam R. Santosuosso, Attorney-in-Fact for Scott A. Richardson 2021-08-06