0001306830-21-000079 4 1 20210412 20210413 20210413 WULFF JOHN K 0001257328 4 34 001-32410 21823188 C/O HERCULES INC 1313 NORTH MARKET STREET WILMINGTON DE 19894-0001 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_161834463933107.xml FORM 4 FORM 4 OMB APPROVAL [ ] Check this OMB Number: box if no longer UNITED STATES SECURITIES AND EXCHANGE COMMISSION 3235-0287 subject to Washington, D.C. 20549 Estimated Section 16. Form STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP OF average burden 4 or Form 5 SECURITIES hours per obligations may response... 0.5 continue. See Instruction 1(b). Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934 or Section 30(h) of the Investment Company Act of 1940 1. Name and Address of Reporting 2. Issuer Name and Ticker 5. Relationship of Person * or Trading Symbol Reporting Person(s) to WULFF JOHN K Celanese Corp [ CE ] Issuer (Check all applicable) __X__ Director _____ (Last) (First) (Middle) 3. Date of Earliest 10% Owner C/O CELANESE CORPORATION, 222 W. Transaction (MM/DD/YYYY) _____ Officer (give title LAS COLINAS BLVD., SUITE 900N 4/12/2021 below) _____ Other (specify below) (Street) 4. If Amendment, Date 6. Individual or IRVING, TX 75039-5421 Original Filed Joint/Group Filing (Check (City) (State) (Zip) (MM/DD/YYYY) Applicable Line) _X _ Form filed by One Reporting Person ___ Form filed by More than One Reporting Person Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned 1.Title of Security 2. Trans. Date 2A. 3. Trans. 4. Securities Acquired (A) or Disposed 5. Amount of 6. Ownership 7. Nature of (Instr. 3) Deemed Code of (D) Securities Form: Direct (D) Indirect Execution (Instr. 8) (Instr. 3, 4 and 5) Beneficially or Indirect (I) Beneficial Date, if Owned Following (Instr. 4) Ownership (Instr. any Reported 4) Transaction(s) (A) (Instr. 3 and 4) or Code V Amount (D) Price Common Stock 4/12/2021 S 4800 (1) D $153.694 (2) 12421 D Common Stock 4/12/2021 S 1200 (1) D $154.331 (3) 11221 D Table II - Derivative Securities Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities) 1. Title of 2. 3. 3A. 4. Trans. 5. Number of 6. Date Exercisable 7. Title and Amount of 8. Price 9. Number of 10. 11. Nature Derivate Conversion Trans. Deemed Code Derivative and Expiration Date Securities Underlying of derivative Ownership of Security or Date Execution (Instr. 8) Securities Derivative Security Derivative Securities Form of Indirect (Instr. 3) Exercise Date, if Acquired (A) or (Instr. 3 and 4) Security Beneficially Derivative Beneficial Price of any Disposed of (D) (Instr. 5) Owned Security: Ownership Derivative (Instr. 3, 4 Following Direct (D) (Instr. 4) Security and 5) Reported or Transaction(s) Indirect Date Expiration Amount or (Instr. 4) (I) Exercisable Date Title Number of (Instr. 4) Code V (A) (D) Shares Explanation of Responses: (1) The sales reported in this line were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on March 16, 2021. (2) The reported price in this line is a weighted average sales price. These shares were sold in multiple transactions at prices ranging from $153.20 to $154.13. The reporting person will provide to the Company, any security holder of the Company, or the staff of the SEC, upon request, full information regarding the number of shares sold at each price within the ranges set forth in footnotes (2) and (3) to this Form 4. (3) The reported price in this line is a weighted average sales price. These shares were sold in multiple transactions at prices ranging from $154.24 to $154.45. Reporting Owners Reporting Owner Name / Address Relationships Director 10% Owner Officer Other WULFF JOHN K C/O CELANESE CORPORATION X 222 W. LAS COLINAS BLVD., SUITE 900N IRVING, TX 75039-5421 Signatures /s/ Adam R. Santosuosso, Attorney-in-Fact for John K. Wulff 4/13/2021 ** Signature of Reporting Person Date Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly. * If the form is filed by more than one reporting person, see Instruction 4(b)(v). ** Intentional misstatements or omissions of facts constitute Federal Criminal Violations. See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a). Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure. Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB control number.