X0202 SCHEDULE 13G 0001021944 XXXXXXXX LIVE Class A Ordinary Shares, par value US$0.000002 per share 05/18/2026 0001767582 Luckin Coffee Inc. 54951L109 28th Floor, Building T3, Haixi Jingu Pla Siming District, Xiamen City, Fujian, Pe Xiamen, Fujian F4 361008 Rule 13d-1(c) Temasek Holdings (Private) Limited U0 0.00 137015912.00 0.00 137015912.00 137015912.00 N 6.4 HC Temasek Capital (China) Holdings Pte. Ltd. U0 0.00 111717512.00 0.00 111717512.00 111717512.00 N 5.2 HC Luckin Coffee Inc. 28th Floor, Building T3, Haixi Jingu Plaza, 1-3 Taibei Road.Siming District, Xiamen City, Fujian, China, 361008 This Schedule 13G is being filed jointly by: (i) Temasek Holdings (Private) Limited ("Temasek"); and (ii) Temasek Capital (China) Holdings Pte. Ltd. ("Temasek Capital (China)", together with Temasek, the "Reporting Persons"). The Reporting Persons entered into a joint filing agreement, dated as of May 22, 2026 (incorporated by reference to Exhibit 99.1 to this Schedule 13G). For each of the Reporting Persons: 60B Orchard Road #06-18 The Atrium@Orchard Singapore 238891 Each of the Reporting Persons: Republic of Singapore Y As of the close of business on May 18, 2026: Temasek - 137,015,912 Class A ordinary shares (including 32,313,912 Class A ordinary shares and 104,702,000 Class A ordinary shares represented by ADS), comprising (i) 111,717,512 Class A ordinary shares (including 25,851,128 Class A ordinary shares and 85,866,384 Class A ordinary shares represented by ADS) beneficially owned by its wholly owned subsidiary Temasek Capital (China), and (ii) 25,298,400 Class A ordinary shares (including 6,462,784 Class A ordinary shares and 18,835,616 Class A ordinary shares represented by ADS) beneficially owned by certain entities that are indirectly wholly owned by the general partner of a limited partnership, for and on behalf of such limited partnership; both the general partner and the investment manager of this limited partnership are indirectly wholly owned subsidiaries of Temasek. Temasek Capital (China) - 111,717,512 Class A ordinary shares (including 25,851,128 Class A ordinary shares and 85,866,384 Class A ordinary shares represented by ADS), held through its wholly owned subsidiaries. There is no CUSIP number assigned to the Class A ordinary shares. CUSIP number 54951L109 has been assigned to the American Depositary Shares ("ADSs") of the Issuer, each ADS representing eight Class A Ordinary Shares, which are quoted on the OTC market under the symbol "LKNCY." Temasek: 6.4% Temasek Capital (China): 5.2% The ownership percentages are calculated based on 2,154,137,392 Class A Ordinary Shares of the Issuer outstanding as of February 28, 2026, according to the Form 20-F filed by the Issuer with the Securities and Exchange Commission on March 27, 2026. 0 for each Reporting Person Temasek: 137,015,912 Temasek Capital (China): 111,717,512 0 for each Reporting Person Temasek: 137,015,912 Temasek Capital (China): 111,717,512 Y Y Y Y Y N By signing below I certify that, to the best of my knowledge and belief, the securities referred to above were not acquired and are not held for the purpose of or with the effect of changing or influencing the control of the issuer of the securities and were not acquired and are not held in connection with or as a participant in any transaction having that purpose or effect, other than activities solely in connection with a nomination under § 240.14a-11. 99.1 Joint Filing Agreement Temasek Holdings (Private) Limited /s/ Jason Norman Lee 05/22/2026 Temasek Capital (China) Holdings Pte. Ltd. /s/ Jason Norman Lee 05/22/2026