X0202 SCHEDULE 13G 0002080343 XXXXXXXX LIVE Common Stock, $0.00001 par value per share 06/30/2026 0002096997 Kailera Therapeutics, Inc. 482931102 180 Third Avenue, 4th Floor Waltham MA 02451 Rule 13d-1(d) Jiangsu Hengrui Pharmaceuticals Co., Ltd. F4 11511853.00 0.00 11511853.00 0.00 11511853.00 N 8.9 CO Note to Item 9: Represents 11,511,852 shares of Common Stock held by Jiangsu Hengrui Pharmaceuticals Co., Ltd. and 1 share of Common Stock held by Hengrui (USA) Ltd. Hengrui (USA) Ltd. is a wholly-owned subsidiary of Jiangsu Hengrui Pharmaceuticals Co., Ltd. Note to Item 11: This percentage is calculated based on 129,537,314 shares of Common Stock issued and outstanding, as reported by the Issuer in its prospectus relating to its initial public offering (after giving effect to the full exercise of the underwriters' option to purchase additional shares), filed with the Securities and Exchange Commission pursuant to Rule 424(b) under the Securities Act of 1933, as amended, on April 17, 2026. Kailera Therapeutics, Inc. 180 Third Avenue, 4th Floor Waltham, MA, 02451 Jiangsu Hengrui Pharmaceuticals Co., Ltd. No. 7 Kunlunshan Road, Economic and Technological Development Zone, Lianyungang, Jiangsu People's Republic of China Y 11,511,853 shares of Common Stock 8.9% This percentage is calculated based on 129,537,314 shares of Common Stock issued and outstanding, as reported by the Issuer in its prospectus relating to its initial public offering (after giving effect to the full exercise of the underwriters' option to purchase additional shares), filed with the Securities and Exchange Commission pursuant to Rule 424(b) under the Securities Act of 1933, as amended, on April 17, 2026. 11,511,853 0 11,511,853 0 Y Y Y Y Y Y Jiangsu Hengrui Pharmaceuticals Co., Ltd. /s/ Lau Kin Chun 08/05/2026