6-K

UNITED STATESSECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 6-K

REPORT OF FOREIGN PRIVATE ISSUER PURSUANT TORULE 13a-16 OR 15d-16 UNDER THESECURITIES EXCHANGE ACT OF 1934

Forthe month of August 2024

Commission File Number: 001-34656

H World Group Limited

(Registrant’s name)

No. 1299 Fenghua Road

Jiading District

ShanghaiPeople’s Republic of China(86) 21 6195-2011 ****(Address of principal executive office)

Indicate by check mark whether the registrant files or will file annual reports under cover of Form 20-F or Form 40-F.

Form 20-F x    Form 40-F ¨

Conversion Rate Adjustment for Convertible SeniorNotes due 2026 as a Result of Dividend

In July 2024, the board of directors of H World Group Limited (the “Company”) declared a cash dividend of US$0.063 per ordinary share, or US$0.63 per American Depositary Share (“ADS”). Holders of the Company’s ordinary shares or ADSs at the close of business on August 14, 2024 will be entitled to receive the cash dividend. As a result of the cash dividend, the conversion rate for the Company’s outstanding 3.00% convertible senior notes due 2026 issued in May 2020 (the “Notes”) increased from 24.7854 to 25.3341 with immediate effect after the close of business on August 14, 2024 (New York City time). The adjustment is made in accordance with the terms of the indenture for the Notes.

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SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned, thereunto duly authorized.

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