6-K

UNITED STATES

SECURITIES AND EXCHANGECOMMISSION

Washington, D.C. 20549

FORM 6-K

REPORT OF FOREIGN PRIVATEISSUER

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

THE SECURITIES EXCHANGEACT OF 1934

For the month of June 2023

Commission File Number:001-40540

Atour Lifestyle HoldingsLimited

(Exact name of registrantas specified in its charter)

18th floor, Wuzhong Building,

618 Wuzhong Road, MinhangDistrict,

Shanghai, People’sRepublic of China

(+86) 021-64059928

(Address of principalexecutive office)

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

EXHIBIT INDEX

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.

Exhibit 99.1

Atour Lifestyle HoldingsLimited Announces Proposed Registered Secondary Offering of

American DepositaryShares by Legend Capital

SHANGHAI, June 5, 2023 /GlobeNewswire/ — Atour Lifestyle Holdings Limited (“Atour” or the “Company”) (NASDAQ: ATAT), a leading hospitality and lifestyle company in China, today announced the commencement of a proposed registered underwritten offering by entities affiliated with Legend Capital (“Legend Capital”) of American depositary shares (the “ADSs”), each ADS representing three Class A ordinary shares of the Company. Legend Capital proposes to offer an aggregate of 4,800,000 ADSs (the “Secondary Offering”). The underwriters in the Secondary Offering have a 30-day option to purchase up to 720,000 additional ADSs from Legend Capital.

The Company will not receive any proceeds from the sale of the ADSs by Legend Capital.

BofA Securities, Inc. and CMB International Capital Limited act as the joint bookrunners for the proposed Secondary Offering.

A registration statement on Form F-1 relating to these securities has been filed with the Securities and Exchange Commission but has not yet become effective. These securities may not be sold nor may offers to buy be accepted prior to the time the registration statement becomes effective.

The offering will be made only by means of a prospectus. A copy of the prospectus related to this Secondary Offering may be obtained by contacting BofA Securities, Inc., One Bryant Park, New York, NY 10036, United States of America, Attention: Prospectus Department, telephone: +1-800-294-1322, email: dg.prospectus_requests@bofa.com; CMB International Capital Limited, 45F, Champion Tower, 3 Garden Road, Central, Hong Kong, Attention: CMBI ECM, telephone: +852-3761-8990, email: ECMs@cmbi.com.hk.

This press release shall not constitute an offer to sell, or a solicitation of an offer to buy, the securities described herein, nor shall there be any offer, solicitation or sale of these securities in any state or jurisdiction in which such an offer, solicitation or sale would be unlawful prior to registration or qualification under the securities laws of any such state or jurisdiction.

About Atour Lifestyle Holdings Limited

Atour Lifestyle Holdings Limited (NASDAQ: ATAT) is a leading hospitality and lifestyle company in China, with a distinct portfolio of lifestyle hotel brands. Atour is the leading upper midscale hotel chain in China and is the first Chinese hotel chain to develop a scenario-based retail business. Atour is committed to bringing innovations to China’s hospitality industry and building new lifestyle brands around hotel offerings. For more information, please visit https://ir.yaduo.com.

Safe Harbor Statement

This press release contains forward-looking statements. These statements are made under the "safe harbor" provisions of the U.S. Private Securities Litigation Reform Act of 1995. Statements that are not historical facts, including statements about the Company's beliefs and expectations, are forward-looking statements. In some cases, forward-looking statements can be identified by words or phrases such as "may," "will," "expect," "anticipate," "target," "aim," "estimate," "intend," "plan," "believe," "potential," "continue," "is/are likely to," or other similar expressions. Forward-looking statements involve inherent risks and uncertainties, and a number of factors could cause actual results to differ materially from those contained in any forward-looking statement. Further information regarding these and other risks, uncertainties or factors is included in the Company's filings with the SEC. All information provided in this press release is as of the date of this press release, and the Company does not undertake any duty to update such information, except as required under applicable law.

Investor Relations Contact

Atour Lifestyle Holdings Limited

Email: ir@yaduo.com

Piacente Financial Communications

Email: Atour@tpg-ir.com

Tel: +86-10-6508-0677

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