Common Stock, par value $0.001 per share

Kezar Life Sciences, Inc.

4000 Shoreline Court, South San Francisco, CA, 94080

Each of the following is referred to as a "Reporting Person" and collectively as the "Reporting Persons:" ETIL, with respect to the Common Stock directly and beneficially owned by it and Tracy Gia Yunn Tsoi, with respect to the Common Stock beneficially owned by her as a result of her position as a director of ETIL; and Tracy Gia Yunn Tsoi, who is the sole director of ETIL and has sole voting and dispositive power with respect to the securities held by ETIL. Ms. Tsoi disclaims beneficial ownership of the securities owned directly by ETIL. ETIL is ultimately wholly beneficially owned by a trust over which Peter Stuart Allenby Edwards, a director of Morningside Venture Investments Limited, has sole authority to remove the trustee.

With respect to ETIL and Ms. Tsoi: c/o THC Management Services S.A.M., 2nd Floor, Le Prince De Galles 3-5 Avenue Des Citronniers MC 98000, Monaco With copies to: Morningside Technology Advisory, LLC Attn: Stephanie O'Brien, Esq. 1188 Centre Street Newton Centre, MA 02459 Springfield Financial Advisory Limited Attn: Alice Li/Makim Ma 22nd Floor Hang Lung Centre 2-20 Paterson Street Causeway Bay, Hong Kong

The present principal business of ETIL and Ms. Tsoi is the venture capital and private equity investment business.

No Reporting Person, during the last five years, has been a party to a civil proceeding of a judicial or administrative body of competent jurisdiction and as a result of such proceeding was or is subject to a judgment, decree or final order enjoining future violations of, or prohibiting or mandating activities subject to, federal or state securities laws or finding any violation with respect to such laws.

ETIL is a British Virgin Islands Exempted Company. Ms. Tsoi is a citizen of Australia.

The information contained on the cover pages is incorporated by reference to this Item 5.

The Information contained on the cover pages is incorporated by reference to this Item 5. The aggregate percentage of Common Stock reported beneficially owned by each person named herein is determined in accordance with SEC rules and is based upon 7,119,945 shares of Common Stock outstanding as of February 3, 2025, as reported in the Issuer's Registration Statement on Form S-3 filed with the SEC on February 5, 2025. The applicable SEC rules generally attribute beneficial ownership of securities to persons who possess sole or shared voting power or investment power with respect to those securities.

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