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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(Print or Type Responses)

1. Name and Address of Reporting Person * Williams Karen A 2. Issuer Name and Ticker or Trading Symbol Global Business Travel Group, Inc. [GBTG] 5. Relationship of Reporting Person(s) to Issuer (Check all applicable) _____ Director _____ 10% Owner __X__ Officer (give title below) _____ Other (specify below) Chief Financial Officer (Last) (First) (Middle) C/O GLOBAL BUSINESS TRAVEL GROUP, INC., 666 THIRD AVENUE 3. Date of Earliest Transaction (Month/Day/Year) 09/29/2026 (Street) NEW YORK, NY 10017 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 Class A Common Stock 09/29/2026 D 97,072(1) D (2) 451,598 D Class A Common Stock 09/29/2026 D 451,598 D (3) 0 D Class A Common Stock 09/29/2026 A 236,503(4) A $ 0 236,503 D Class A Common Stock 09/29/2026 D 236,503 D (5) 0 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

Reporting Owners

Reporting Owner Name / Address	Relationships
	Director	10% Owner	Officer	Other
Williams Karen A C/O GLOBAL BUSINESS TRAVEL GROUP, INC. 666 THIRD AVENUE NEW YORK, NY 10017			Chief Financial Officer

Signatures

Jennifer Giampietro, as Attorney-in-Fact		09/29/2026
**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)	Includes shares acquired under the Issuer's Employee Stock Purchase Plan on August 14, 2026.
(2)	On September 29, 2026, pursuant to that certain Agreement and Plan of Merger (the "Merger Agreement"), dated May 2, 2026, by and among the Issuer, Gaia Purchaser, Inc. ("Parent") and Gaia Merger Sub, Inc., a wholly owned subsidiary of Parent, the Issuer became a wholly owned subsidiary of Parent (the "Merger"). At the effective time of the Merger (the "Effective Time"), pursuant to the Merger Agreement, each share of Class A common stock, par value $0.0001 per share, of the Issuer ("Company Common Stock") held by the reporting person as of immediately prior to the Effective Time was automatically cancelled and converted into the right to receive cash in an amount equal to $9.50, without interest thereon (the "Per Share Price").
(3)	As of immediately prior to the Effective Time, pursuant to the Merger Agreement, each award of restricted stock units of the Issuer (a "Company RSU") that was outstanding as of immediately prior to the Effective Time was automatically cancelled and converted into the right to receive an amount in cash, without interest and subject to applicable withholding taxes, equal to the product of (i) the Per Share Price and (ii) the total number of shares of Company Common Stock subject to such Company RSU as of immediately prior to the Effective Time.
(4)	Represents a deemed acquisition of shares of Company Common Stock underlying each award of performance stock units of the Issuer (a "Company PSU") held by the reporting person that was unvested and outstanding as of immediately prior to the Effective Time based on the attainment of the applicable performance metrics at the greater of (i) the target number of shares of Company Common Stock subject to such Company PSU as of immediately prior to the Effective Time and (ii) the number of shares of Company Common Stock to be earned based on actual achievement of the performance criteria set forth in the applicable award agreement as of immediately prior to the Effective Time.
(5)	As of immediately prior to the Effective Time, each Company PSU that was outstanding as of immediately prior to the Effective Time was automatically cancelled and converted into the right to receive an amount in cash, without interest and subject to applicable withholding taxes, equal to the product of (A) the Per Share Price and (B) the greater of (i) the target number of shares of Company Common Stock subject to such Company PSU as of immediately prior to the Effective Time and (ii) the number of shares of Company Common Stock to be earned based on actual achievement of the performance criteria set forth in the applicable award agreement as of immediately prior to the Effective Time.

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