6-K

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

WASHINGTON, D.C. 20549

FORM 6-K

REPORT OF FOREIGN PRIVATE ISSUER

PURSUANT TO RULE 13a-16 OR 15d-16

UNDER THE SECURITIES EXCHANGE ACT OF 1934

For the month of May 2026

Commission File Number: 001-37385

Baozun Inc.

No. 1-9, Lane 510, West Jiangchang Road

Shanghai 200436

The People’s Republic of China

(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 ¨

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.

Date: May 21, 2026

Exhibit Index

Safe Harbor Statement

This announcement contains forward-looking statements. These statements are made under the “safe harbor” provisions of the U.S. Private Securities Litigation Reform Act of 1995. These forward-looking statements can be identified by terminology such as “will,” “expects,” “anticipates,” “aims,” “future,” “intends,” “plans,” “believes,” “estimates,” “confident,” “potential,” “continues,” “ongoing,” “targets,” “guidance,” “going forward,” “outlook” or other similar expressions. Statements that are not historical facts, including but not limited to statements about Baozun’s beliefs and expectations, are forward-looking statements. Forward-looking statements involve inherent risks and uncertainties. A number of factors could cause actual results to differ materially from those contained in any forward-looking statement, including but not limited to Baozun’s filings with the United States Securities and Exchange Commission and its announcements, notices or other documents published on the website of The Stock Exchange of Hong Kong Limited. All information provided in this announcement is as of the date hereof and is based on assumptions that Baozun believes to be reasonable as of this date, and Baozun undertakes no obligation to update such information, except as required under applicable law.

Exhibit 99.1

Hong Kong Exchangesand Clearing Limited and The Stock Exchange of Hong Kong Limited take no responsibility for the contents of this announcement, make norepresentation as to its accuracy or completeness and expressly disclaim any liability whatsoever for any loss howsoever arising fromor in reliance upon the whole or any part of the contents of this announcement.

Under our weighted votingrights structure, our share capital comprises Class A ordinary shares and Class B ordinary shares. Each Class A ordinary share entitlesthe holder to exercise one vote, and each Class B ordinary share entitles the holder to exercise ten votes, respectively, on any resolutiontabled at our general meetings, except as may otherwise be required by law or by the Rules Governing the Listing of Securities on theStock Exchange of Hong Kong Limited (the “Listing Rules”) or provided for in our memorandum and articles of association.Shareholders and prospective investors should be aware of the potential risks of investing in a company with a weighted voting rightsstructure. Our American depositary shares, each representing three of our Class A ordinary shares, are listed on the Nasdaq Global SelectMarket in the United States under the symbol BZUN.

Baozun Inc.

寶尊電商有限公司**^*^**

(A company controlledthrough weighted voting rights and incorporated in the Cayman Islands with limited liability)

(Stock Code: 9991)

GRANTOF RESTRICTED SHARE UNIT AWARDS

Baozun Inc. (the “Company”, together with its consolidated subsidiaries and its affiliated consolidated entities, the “Group”) hereby announces that on May 21, 2026 (Hong Kong time), the Company granted and proposed to grant restricted share unit awards (the “RSUs”) under the 2022 share incentive plan of the Company (the “2022 Plan”) to certain grantees (the “Grantees”), the details of which are set forth as follows:

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The RSUs are subject to the terms and conditions of the 2022 Plan and award agreements applicable to the Grantees. Details of the 2022 Plan are set out in Appendix IV – The 2022 Plan of the circular of the Company dated October 5, 2022.

Each of the grant of RSUs to the Directors forms part of his/her remuneration package under his/ her service contract with the Company. In respect of the three independent Directors, the grant of RSUs is intended to retain and motivate them to continue to provide their advice and judgement to the Board for the Company’s long-term development. The Board does not consider that the grant would affect the independence of the three independent Directors pursuant to Rule 3.13 of the Listing Rules.

Pursuant to Rule 17.04(1) of the Listing Rules, the grant of RSUs to the above Directors has been approved by the Board (including the independent Directors), save that each Director has abstained from voting on the relevant resolutions in relation to the grant of RSUs to himself/herself.

As of the date of this announcement, 2 Shares remained available for future grants under the 2022 Plan in accordance with the terms of the 2022 Plan, of which 2 Shares are available for future grants to the service providers.

Hong Kong, May 21, 2026

As at the date of this announcement, our boardof directors comprises Mr. Vincent Wenbin Qiu as the chairman, Mr. Junhua Wu, Dr. Jun Wang and Ms. Bin Yu as directors, and Mr. Yiu PongChan, Mr. Steve Hsien-Chieng Hsia and Mr. Benjamin Changqing Ye as independent directors.

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