X0202 SCHEDULE 13G 0002139313 XXXXXXXX LIVE Ordinary Shares, par value US$0.0001 per share 06/29/2026 0001948443 Raytech Holding Limited G7385S119 Unit 609, 6/F, Nan Fung Commercial Centr No. 19 Lam Lok Street Kowloon Bay K3 000000 Rule 13d-1(c) WK FRATER HOLDINGS LIMITED b D8 999014.00 0.00 999014.00 0.00 999014.00 N 17.01 CO 1 The percentage of 17.01% is calculated based on a total of 5,874,743 Ordinary Shares outstanding. This total is derived from: (i) 2,724,911 Ordinary Shares outstanding prior to the offering, as disclosed in the Issuer's Prospectus on Form 424B5 filed on June 22, 2026; plus (ii) 3,149,832 Ordinary Shares sold in a public offering that closed on June 29, 2026, as disclosed in the Issuer's Report on Form 6-K filed on June 30, 2026. Raytech Holding Limited Unit 609, 6/F, Nan Fung Commercial Centre, No. 19 Lam Lok Street, Kowloon Bay, Hong Kong. WK FRATER HOLDINGS LIMITED Room 4011, 40/F, COSCO Tower, Grand Millennium Plaza, 183 Queen's Road Central, Hong Kong British Virgin Island Y 999,014 17.01% 999,014 0 999,014 0 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. WK FRATER HOLDINGS LIMITED /s/ LI Xining 07/09/2026