X0508 4 2025-05-15 0 0001306830 Celanese Corp CE 0001663266 Go Timothy C/O CELANESE CORPORATION 222 W. LAS COLINAS BLVD., SUITE 900N IRVING TX 75039 1 0 0 0 0 Common Stock 2025-05-15 4 D 0 1114 D 3376 D Phantom Stock 2025-05-15 4 A 0 1114 0 A Common Stock 1114 1114 D Upon vesting of 1,114 Restricted Stock Units granted to the reporting person on May 15, 2024, the reporting person deferred the receipt of 1,114 shares of Common Stock and received instead 1,114 shares of phantom stock pursuant to the Company's 2008 Deferred Compensation Plan (the "Plan"). As a result, the reporting person is reporting the disposition of 1,114 shares of Common Stock in exchange for an equal number of shares of phantom stock. Each share of phantom stock represents the right to receive one share of Common Stock. As provided in the Plan, the reported phantom stock becomes payable in shares of Common Stock upon termination of the reporting person's service as a director of the Company subject to certain restrictions and limitations. /s/ Christine Dryden, Attorney-in-Fact for Timothy Go 2025-05-19