EX-4.1



 Exhibit 4.1 
  

     
      

	
	 






  
 Exhibit 4.1 
ZQ|CERT#|COY|CLS|RGSTRY|ACCT#|TRANSTYPE|RUN#|TRANS# 
COMMON STOCK COMMON STOCK 
PAR VALUE $0.001 
Certificate Number ZQ00000000 
SAMPLE 
Shares 
**000000****************** 
***000000***************** 
****000000**************** 
*****000000*************** 
******000000************** 
KEZAR LIFE SCIENCES, INC. 
INCORPORATED UNDER THE LAWS OF THE STATE OF DELAWARE 
THIS CERTIFIES THAT 
MR SAMPLE & MRS SAMPLE & MR SAMPLE & MRS SAMPLE 
SEE REVERSE FOR CERTAIN
DEFINITIONS CUSIP 49372L 10 0 
is the owner of 
***ZERO HUNDRED THOUSAND ZERO
HUNDRED AND ZERO *** 
THIS CERTIFICATE IS TRANSFERABLE IN CITIES DESIGNATED BY THE TRANSFER AGENT, AVAILABLE ONLINE AT www.computershare.com 
FULLY-PAID AND NON-ASSESSABLE SHARES OF COMMON STOCK OF 
Kezar Life Sciences, Inc. (hereinafter
called the “Company”), transferable on the books of the Company in person or by duly authorized attorney, upon surrender of this Certificate properly endorsed. This Certificate and the shares represented hereby, are issued and shall be
held subject to all of the provisions of the Certificate of Incorporation, as amended, and the Bylaws, as amended, of the Company (copies of which are on file with the Company and with the Transfer Agent), to all of which each holder, by acceptance
hereof, assents. This Certificate is not valid unless countersigned and registered by the Transfer Agent and Registrar. 
Witness the facsimile seal of the Company
and the facsimile signatures of its duly authorized officers. 
DATED DD-MMM-YYYY

COUNTERSIGNED AND REGISTERED: 
COMPUTERSHARE TRUST COMPANY, N.A. 
TRANSFER AGENT AND REGISTRAR, 
FACSIMILE SIGNATURE TO COME 
Chief Executive Officer 
FACSIMILE SIGNATURE TO COME 
Secretary 
By AUTHORIZED SIGNATURE 
KEZAR LIFE SCIENCES, INC. CORPORATE SEAL 2015 DELAWARE 
SAMPLE 
The Sample Company 
PO BOX 43004, Providence, RI 02940-3004 
MR A SAMPLE 
DESIGNATION (IF ANY) ADD 1 ADD 2 ADD 3 ADD 4 
CUSIP/IDENTIFIER XXXXXX XX X 
Holder ID XXXXXXXXXX 
Insurance Value 00.1,000,000 Number of Shares 123456 
DTC 12345678 123456789012345 
Certificate Numbers Num/No Denom. Total 
1234567890/1234567890 111 
1234567890/1234567890 222 
1234567890/1234567890 333 
1234567890/1234567890 444 
1234567890/1234567890 555 
1234567890/1234567890 666 
Total Transaction 7 







 



 
  
 KEZAR LIFE SCIENCES, INC. 
THE COMPANY WILL FURNISH WITHOUT CHARGE TO EACH STOCKHOLDER WHO SO REQUESTS, A SUMMARY OF THE POWERS, DESIGNATIONS, PREFERENCES AND RELATIVE, PARTICIPATING, OPTIONAL OR OTHER
SPECIAL RIGHTS OF EACH CLASS OF STOCK OF THE COMPANY AND THE QUALIFICATIONS, LIMITATIONS OR RESTRICTIONS OF SUCH PREFERENCES AND RIGHTS, AND THE VARIATIONS IN RIGHTS, PREFERENCES AND LIMITATIONS DETERMINED FOR EACH SERIES, WHICH ARE FIXED BY THE
CERTIFICATE OF INCORPORATION OF THE COMPANY, AS AMENDED, AND THE RESOLUTIONS OF THE BOARD OF DIRECTORS OF THE COMPANY, AND THE AUTHORITY OF THE BOARD OF DIRECTORS TO DETERMINE VARIATIONS FOR FUTURE SERIES. SUCH REQUEST MAY BE MADE TO THE OFFICE OF
THE SECRETARY OF THE COMPANY OR TO THE TRANSFER AGENT. THE BOARD OF DIRECTORS MAY REQUIRE THE OWNER OF A LOST OR DESTROYED STOCK CERTIFICATE, OR HIS LEGAL REPRESENTATIVES, TO GIVE THE COMPANY A BOND TO INDEMNIFY IT AND ITS TRANSFER AGENTS AND
REGISTRARS AGAINST ANY CLAIM THAT MAY BE MADE AGAINST THEM ON ACCOUNT OF THE ALLEGED LOSS OR DESTRUCTION OF ANY SUCH CERTIFICATE. 
The following abbreviations, when
used in the inscription on the face of this certificate, shall be construed as though they were written out in full according to applicable laws or regulations:

TEN COM - as tenants in common 
TEN ENT - as tenants by the entireties

JT TEN - as joint tenants with right of survivorship and not as tenants in common 
UNIF GIFT MIN ACT - Custodian 
(Cust) (Minor) 
under Uniform Gifts to Minors Act (State) 
UNIF TRF MIN ACT - Custodian (until age ) (Cust)

under Uniform Transfers to Minors Act (Minor) (State) 
Additional
abbreviations may also be used though not in the above list. 
PLEASE INSERT SOCIAL SECURITY OR OTHER IDENTIFYING NUMBER OF ASSIGNEE 
For value received, hereby sell, assign and transfer unto (PLEASE PRINT OR TYPEWRITE NAME AND ADDRESS, INCLUDING POSTAL ZIP CODE, OF ASSIGNEE) 
Shares of the common stock represented by the within Certificate, and do hereby irrevocably constitute and appoint 
Attorney to transfer the said stock on the books of the within-named Company with full power of substitution in the premises. 
Signature(s) Guaranteed: Medallion Guarantee Stamp 
THE SIGNATURE(S) SHOULD BE GUARANTEED BY AN
ELIGIBLE GUARANTOR INSTITUTION (Banks, Stockbrokers, Savings and Loan Associations and Credit Unions) WITH MEMBERSHIP IN AN APPROVED SIGNATURE GUARANTEE MEDALLION PROGRAM, PURSUANT TO S.E.C. RULE 17Ad-15. 
Notice: The signature to this assignment must correspond with the name as written upon the face of the certificate, in every particular, without alteration or enlargement, or any
change whatever. 
The IRS requires that the named transfer agent (“we”) report the cost basis of certain shares or units acquired after January 1, 2011.
If your shares or units are covered by the legislation, and you requested to sell or transfer the shares or units using a specific cost basis calculation method, then we have processed as you requested. If you did not specify a cost basis
calculation method, then we have defaulted to the first in, first out (FIFO) method. Please consult your tax advisor if you need additional information about cost basis. 
If you do not keep in contact with the issuer or do not have any activity in your account for the time period specified by state law, your property may become subject to state
unclaimed property laws and transferred to the appropriate state. 
SECURITY INSTRUCTIONS 
THIS IS WATERMARKED PAPER DO NOT ACCEPT WITHOUT NOTING WATERMARK HOLD TO LIGHT TO VERIFY WATERMARK