EX-31.3 2 kzr-20251231xex313.htm EX-31.3

Exhibit 31.3

CERTIFICATION PURSUANT TO

RULES 13a-14(a) UNDER THE SECURITIES EXCHANGE ACT OF 1934,

AS ADOPTED PURSUANT TO SECTION 302 OF THE SARBANES-OXLEY ACT OF 2002

I, Christopher Kirk, Ph.D., certify that:

1.I have reviewed this Amendment No. 1 to the Annual Report on Form 10-K/A of Kezar Life Sciences, Inc.;

2.Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report;

Date: April 30, 2026			By:			/s/ Christopher Kirk, Ph.D.
						Christopher Kirk, Ph.D.
						Chief Executive Officer (Principal Executive Officer)