Statement of Changes in Beneficial Ownership (Form 4)

FORM 4 Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b). Check this box to indicate that a transaction was made pursuant to a contract, instruction or written plan that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c). See Instruction 10.

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP OF SECURITIES Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934 or Section 30(h) of the Investment Company Act of 1940

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1. Name and Address of Reporting Person * Rucker Kim K.W. 2. Issuer Name and Ticker or Trading Symbol Celanese Corp [CE] 5. Relationship of Reporting Person(s) to Issuer (Check all applicable) __X__ Director _____ 10% Owner _____ Officer (give title below) _____ Other (specify below) (Last) (First) (Middle) C/O CELANESE CORPORATION, 222 W LAS COLINAS BLVD, SUITE 900N 3. Date of Earliest Transaction (Month/Day/Year) 05/09/2026 (Street) IRVING, TX 75039 4. If Amendment, Date Original Filed (Month/Day/Year) 6. Individual or Joint/Group Filing (Check Applicable Line) _X_ Form filed by One Reporting Person ___ Form filed by More than One Reporting Person (City) (State) (Zip) Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned

1.Title of Security (Instr. 3) 2. Transaction Date (Month/Day/Year) 2A. Deemed Execution Date, if any (Month/Day/Year) 3. Transaction Code (Instr. 8) 4. Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5) 5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4) 6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4) 7. Nature of Indirect Beneficial Ownership (Instr. 4) Code V Amount (A) or (D) Price Common Stock 05/09/2026 D 3,376 D (1) 56 D Common Stock 05/11/2026 A 2,975(2) A $ 0 3,031 D

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Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned
(e.g., puts, calls, warrants, options, convertible securities)

1. Title of Derivative Security (Instr. 3)

2. Conversion or Exercise Price of Derivative Security

3. Transaction Date (Month/Day/Year)

3A. Deemed Execution Date, if any (Month/Day/Year)

4. Transaction Code (Instr. 8)

5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4, and 5)

6. Date Exercisable and Expiration Date (Month/Day/Year)

7. Title and Amount of Underlying Securities (Instr. 3 and 4)

8. Price of Derivative Security (Instr. 5)

9. Number of Derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4)

10. Ownership Form of Derivative Security: Direct (D) or Indirect (I) (Instr. 4)

11. Nature of Indirect Beneficial Ownership (Instr. 4)

Code

V

(A)

(D)

Date Exercisable

Expiration Date

Title

Amount or Number of Shares

Phantom Stock

(3)

05/09/2026

A

3,376

(4)

(4)

Common Stock

3,376

$ 0

12,895.723

D

Phantom Stock

(3)

05/11/2026

A

4.796

(5)

(5)

Common Stock

4.796

$59.55

12,900.519

D

Reporting Owners

Reporting Owner Name / Address	Relationships
	Director	10% Owner	Officer	Other
Rucker Kim K.W. C/O CELANESE CORPORATION 222 W LAS COLINAS BLVD, SUITE 900N IRVING, TX 75039	X

Signatures

/s/ Blake Feikema, Attorney-in-Fact for Kim K.W. Rucker		05/13/2026
**Signature of Reporting Person		Date

Explanation of Responses:

*	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).
(1)	Upon vesting of 3,376 Restricted Stock Units granted to the reporting person on May 9, 2025, the reporting person deferred the receipt of 3,376 shares of Common Stock and received instead 3,376 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 3,376 shares of Common Stock in exchange for an equal number of shares of phantom stock.
(2)	Annual grant of restricted stock units pursuant to the Company's Amended and Restated 2018 Global Incentive Plan. The restricted stock units vest in full on the one-year anniversary of the date of the grant. The reporting person has elected that upon vesting of the restricted stock units, receipt of the shares of Common Stock be deferred under the Company's 2008 Deferred Compensation Plan; accordingly, upon vesting, the reporting person will instead receive an equal number of shares of phantom stock. As provided in the Company's 2008 Deferred Compensation Plan, the phantom stock becomes payable in shares of Common Stock upon the earlier of the date previously elected by the reporting person to receive payment or the termination of the reporting person's service as a director of the Company.
(3)	Each share of phantom stock represents the right to receive one share of Common Stock.
(4)	The shares of phantom stock become payable in shares of Common Stock, as provided in the Plan.
(5)	The reported phantom stock represents dividend equivalents on compensation deferred under the Company's 2008 Deferred Compensation Plan (the "Plan"). The shares of phantom stock become payable in shares of Common Stock, as provided in the Plan, following the termination of the reporting person's service as a director of the Company.

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