0001306830-24-000088 DEFA14A 3 20240321 20240321 Celanese Corp 0001306830 2820 08 Industrial Applications and Services 980420726 DE 1231 DEFA14A 34 001-32410 24772048 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 DEFA14A 1 a2024defa14a.htm DEFA14A UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A (Rule 14a-101) Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 Filed by the Registrant þ Filed by a Party other than the Registrant ¨ Check the appropriate box: ¨ Preliminary Proxy Statement ¨ Confidential, for Use of the Commission Only (as permitted by Rule 14a-6(e)(2)) ¨ Definitive Proxy Statement þ Definitive Additional Materials ¨ Soliciting Material Pursuant to §240.14a-12 CELANESE CORPORATION (Name of Registrant as Specified In Its Charter) (Name of Person(s) Filing Proxy Statement, if other than the Registrant) Payment of Filing Fee (Check the appropriate box): þ No fee required ¨ Fee paid previously with preliminary materials. Fee computed on table in exhibit required by Item 25(b) per Exchange Act Rules ¨ 14a-6(i)(1) and 0-11. -------------------------------------------------------------------------------- [[Image Removed: noticepg1.jpg]] -------------------------------------------------------------------------------- [[Image Removed: noticepg2.jpg]]