SCHEDULE 13G/A 0000950103-25-005898 0001965684 XXXXXXXX LIVE 3 Class A Ordinary Shares, par value US$0.0001 per share 06/25/2025 0001853717 Atour Lifestyle Holdings Ltd 04965M106 1st Floor, Wuzhong Building 618 Wuzhong Road, Minhang District SHANGHAI F4 201103 Rule 13d-1(d) Sea Pearl Worldwide Holding Limited D8 75372329.00 0.00 73680917.00 0.00 75372329.00 N 18.2 CO (1) The values in rows 5,7, and 9 represent (i) 73,680,917 Class B ordinary shares held of record by Express Ocean UniverseLimited, a company registered in British Virgin Islands, (ii) 1,691,412 Class A ordinary shares beneficially owned by EngineHoldings Limited and Express Ocean Universe Limited is wholly owned byDreamline Worldwide Ventures Limited, which is in turn wholly owned by Eternal River Trust, or the Trust, for whichTrident Trust Company (HK) Limited acts as the trustee. Haijun Wang is the sole director of Express Ocean UniverseLimited and the settlor of the Trust, retaining the investment and dispositive powers with respect to the assets of theTrust. The beneficiaries of the Trust are Haijun Wang and Sea Pearl Worldwide Holding Limited, a company registered inthe British Virgin Islands and wholly owned by Haijun Wang. Haijun Wang and Sea Pearl Worldwide Holding Limited exercise voting power over the 1,691,412 Class A ordinary sharesbeneficially owned by Engine Holdings Limited. As such, each of Haijun Wangand Sea Pearl Worldwide Holding Limited may be deemed to share beneficial ownership of the foregoing Class Aordinary shares. Both of Haijun Wang and Sea Pearl Worldwide Holding Limited disclaim economic interests with respectto the foregoing Class A ordinary shares. (2) See Item 4 for the calculation of the percentage in row 11. Haijun Wang F4 79904033.00 0.00 78212621.00 0.00 79904033.00 N 19.1 IN (1) The values in rows 5,7, and 9 represent (i) 73,680,917 Class B ordinary shares held of record by Express Ocean Universe Limited, a company registered in British Virgin Islands, (ii) 1,691,412 Class A ordinary shares beneficially owned by Engine Holdings Limited, and (iii) 4,531,704 Class A ordinary shares underlying 4,531,704 share options granted to Haijun Wang under the Issuer's Public Company Plan, which are exercisable within 60 days after June 25, 2025. (2) See Item 4 for the calculation of the percentage in row 11. Express Ocean Universe Limited D8 73680917.00 0.00 73680917.00 0.00 73680917.00 N 17.8 CO (1) The values in rows 5,7, and 9 represent 73,680,917 Class B ordinary shares held of record by Express Ocean Universe Limited, a company registered in British Virgin Islands. (2) See Item 4 for the calculation of the percentage in row 11. Atour Lifestyle Holdings Ltd 1st Floor, Wuzhong Building, 618 Wuzhong Road, Minhang District, hanghai, People's Republic of China Sea Pearl Worldwide Holding Limited Haijun Wang Express Ocean Universe Limited For Sea Pearl Worldwide Holding Limited, Haijun Wang and Express Ocean Universe Limited: 20th floor, Wuzhong Building, 618 Wuzhong Road, Minhang District, Shanghai, People's Republic of China Sea Pearl Worldwide Holding Limited: The British Virgin Islands Haijun Wang: The People's Republic of China Express Ocean Universe Limited: The British Virgin Islands Y The information required by Items 4(a) is set forth in Row 9 of the cover page for each Reporting Person and is incorporated herein by reference. The total number of outstanding Class A ordinary shares used to calculate the percentage of class represented by the Class A ordinary Shares is the sum of (i) 340,876,937 Class A ordinary shares (excluding the 6,602,585 Class A ordinary shares issued to the Issuer's depositary bank for bulk issuance of ADSs reserved for future share issuances upon the exercise or vesting of equity awards under the Issuer's Public Company Share Incentive Plan) and (ii) 73,680,917 Class B ordinary shares, all of which can be converted into an equal number of Class A ordinary shares at any time by the holder thereof, as disclosed in the annual report on Form 20-F for the fiscal year ended December 31, 2024 filed by the Issuer with the SEC on April 25, 2025. Sea Pearl Worldwide Holding Limited: 75,372,329 Haijun Wang: 79,904,033 Express Ocean Universe Limited: 73,680,917 Sea Pearl Worldwide Holding Limited: 0 Haijun Wang: 0 Express Ocean Universe Limited: 0 Sea Pearl Worldwide Holding Limited: 73,680,917 Haijun Wang: 78,212,621 Express Ocean Universe Limited: 73,680,917 Sea Pearl Worldwide Holding Limited: 0 Haijun Wang: 0 Express Ocean Universe Limited: 0 Y Y Y Y Y Y Exhibit A - Joint Filing Agreement Sea Pearl Worldwide Holding Limited /s/ Haijun Wang 06/25/2025 Haijun Wang /s/ Haijun Wang 06/25/2025 Express Ocean Universe Limited /s/ Haijun Wang 06/25/2025