X0306 4 2018-06-25 1 0001645666 Kezar Life Sciences, Inc. KZR 0001528382 Omega Fund IV, L.P. 185 DARTMOUTH STREET BOSTON MA 02116 0 0 0 1 Former 10% Owner 0001528383 Omega Fund IV GP, L.P. 185 DARTMOUTH STREET BOSTON MA 02116 0 0 0 1 Former 10% Owner 0001624456 Omega Fund IV G.P. Manager, Ltd. 185 DARTMOUTH STREET BOSTON MA 02116 0 0 0 1 Former 10% Owner 0001361712 Stampacchia Otello 185 DARTMOUTH STREET BOSTON MA 02116 0 0 0 1 Former 10% Owner 0001623720 Lim Richard J. 185 DARTMOUTH STREET BOSTON MA 02116 0 0 0 1 Former 10% Owner 0001652863 Paster Anne-Mari 185 DARTMOUTH STREET BOSTON MA 02116 0 0 0 1 Former 10% Owner Common Stock 2018-06-25 4 C 0 315489 0.00 A 315489 D Common Stock 2018-06-25 4 C 0 315489 0.00 A 315489 I By Omega IV Common Stock 2018-06-25 4 C 0 377783 0.00 A 693272 D Common Stock 2018-06-25 4 C 0 377783 0.00 A 693272 I By Omega IV Series A Redeemable Convertible Preferred Stock 2018-06-25 4 C 0 315489 0.00 D Common Stock 315489 0 D Series A Redeemable Convertible Preferred Stock 2018-06-25 4 C 0 315489 0.00 D Common Stock 315489 0 I By Omega IV Series B Redeemable Convertible Preferred Stock 2018-06-25 4 C 0 377783 0.00 D Common Stock 377783 0 D Series B Redeemable Convertible Preferred Stock 2018-06-25 4 C 0 377783 0.00 D Common Stock 377783 0 I By Omega IV The Series A Redeemable Convertible Preferred Stock ("Series A") converted automatically into shares of the issuer's common stock on a one-for-one basis upon the completion of the issuer's public offering of common stock pursuant the issuer's amended registration statement under the Securities Act of 1933, as amended, filed with the Commission on June 18, 2018 (the "IPO"). The Series A had no expiration date. The reported securities are beneficially owned by Omega Fund IV GP, L.P. ("Omega IV GP"), as the general partner of Omega Fund IV, L.P. ("Omega IV"). Omega Fund IV G.P. Manager, Ltd. ("Omega IV GP Manager"), is the general partner of Omega IV GP. Otello Stampacchia, Richard Lim and Anne-Mari Paster are all the shareholders and directors of Omega IV GP Manager and have shared voting and investment power over the shares held by Omega Fund IV, L.P. Each of the Reporting Persons disclaims beneficial ownership of these securities, except to the extent of his, her or its pecuniary interest therein. The Series B Redeemable Convertible Preferred Stock ("Series B") converted automatically into shares of the issuer's common stock on a one-for-one basis upon the completion of the IPO. The Series B had no expiration date. By: /s/ Anne-Mari Paster, Signature of Anne-Mari Paster as an authorized signatory of each Reporting Person 2018-06-25