X0508 4 2025-11-17 0 0001306830 Celanese Corp CE 0002000487 Duffie Ashley B C/O 222 W LAS COLINAS BLVD, SUITE 900N IRVING TX 75039 0 1 0 0 SVP & GC 0 Common Stock 2025-11-17 4 A 0 6624 0 A 20459 D Common Stock 624.623 I By 401(k) Plan Time-based restricted stock units ("RSUs") granted pursuant to the Company's Amended and Restated 2018 Global Incentive Plan. Each RSU represents the right to receive one share of Common Stock. The RSUs will vest, subject to continued employment, with respect to 50% of the RSUs on each of November 17, 2026 and November 17, 2027. /s/ Christine Dryden, Attorney-in-Fact for Ashley B. Duffie 2025-11-19