EX-4.1



 Exhibit 4.1 
  





 
  
 ZQ|CERT#|COY|CLS|RGSTRY|ACCT#|TRANSTYPE|RUN#|TRANS# 
COMMON STOCK 
PAR VALUE $0.0001 
COMMON STOCK 
THIS CERTIFICATE IS TRANSFERABLE 
IN CANTON, MA, JERSEY CITY, NJ AND 
COLLEGE STATION, TX 
ADURO BIOTECHTM 
ADURO BIOTECH, INC. 
INCORPORATED UNDER THE LAWS OF THE STATE OF DELAWARE 
Certificate Number 
ZQ00000000 
Shares 
* * 000000* * * * * * * * * * * * * * * * * * 
* * * 000000* * * * * * * * * * * * * * * * *

* * * * 000000* * * * * * * * * * * * * * * * 
* * * * * 000000* * * * * * * *
* * * * * * * 
* * * * * * 000000* * * * * * * * * * * * * * 
THIS CERTIFIES
THAT 
** Mr. Alexander David Sample **** Mr. Alexander David Sample **** Mr. Alexander David Sample **** Mr. Alexander David Sample **** Mr. Alexander David Sample

**** Mr. Alexander David Sample **** Mr. Alexander David Sample **** Mr. Alexander David Sample **** Mr. Alexander David Sample **** Mr. Alexander David

Sample **** Mr. Alexander David Sample **** Mr. Alexander David Sample **** Mr. Alexander David Sample **** Mr. Alexander David Sample **** Mr. Alexander

David Sample **** Mr. Alexander David Sample **** Mr. Alexander David Sample **** Mr. Alexander David Sample **** Mr. Alexander David Sample **** Mr. 
Alexander David Sample **** Mr. Alexander David Sample **** Mr. Alexander David Sample **** Mr. Alexander David Sample **** Mr. Alexander David Sample **** 
Mr. Alexander David Sample **** Mr. Alexander David Sample **** Mr. Alexander David Sample **** Mr. Alexander David Sample **** Mr. Alexander David Sample 
**** Mr. Alexander David Sample **** Mr. Alexander David Sample **** Mr. Alexander David Sample **** Mr. Alexander David Sample **** Mr. Alexander David 
Sample **** Mr. Alexander David Sample **** Mr. Alexander David Sample **** Mr. Alexander David Sample **** Mr. Alexander David Sample **** Mr. Alexander 
David Sample **** Mr. Alexander David Sample **** Mr. Alexander David Sample **** Mr. Alexander David Sample **** Mr. Alexander David Sample **** Mr. 
Alexander David Sample **** Mr. Alexander David Sample **** Mr. Alexander David Sample **** Mr. Alexander David Sample **** Mr. Alexander David Sample **** 
Mr. Alexander David Sample **** Mr. Alexander David Sample **** Mr. Alexander David Sample **** Mr. Alexander David Sample **** Mr. Sample **** Mr. Sample 
MR. SAMPLE & MRS. SAMPLE & 
MR. SAMPLE & MRS. SAMPLE 
CUSIP 00739L 10 1 
SEE REVERSE FOR CERTAIN DEFINITIONS 
is the owner of

**000000**Shares****000000**Shares****000000**Shares****000000**Shares****000000**Shares****000000**Shares****000000**Shares****000000**Shares*** 
*000000**Shares****000000**Shares****000000**Shares****000000**Shares****000000**Shares****000000**Shares****000000**Shares****000000**Shares**** 
000000**Shares****000000**Shares****000000**Shares****000000**Shares****000000**Shares****000000**Shares****000000**Shares****000000**Shares****0 
00000**Shares****000000**Shares****000000**Shares****000000**Shares****000000**Shares****000000**Shares****000000**Shares****000000**Shares****00 
0000**Shares****000000**Shares****000000**Shares****000000**Shares****000000**Shares****000000**Shares****000000**Shares****000000**Shares****000 
000**Shares****000000**Shares****000000**Shares****000000**Shares****000000**Shares****000000**Shares****000000**Shares****000000**Shares****0000 
00**Shares****000000**Shares****000000**Shares****000000**Shares****000000**Shares****000000**Shares****000000**Shares****000000**Shares****00000 
0**Shares****000000**Shares****000000**Shares****000000**Shares****000000**Shares****000000**Shares****000000**Shares****000000**Shares****000000 
**Shares****000000**Shares****000000**Shares****000000**Shares****000000**Shares****000000**Shares****000000**Shares****000000**Shares****000000* 
*Shares****000000**Shares****000000**Shares****000000**Shares****000000**Shares****000000**Shares****000000**Shares****000000**Shares****000000** 
Shares****000000**Shares****000000**Shares****000000**Shares****000000**Shares****000000**Shares****000000**Shares****000000**Shares****000000**S 
***ZERO HUNDRED THOUSAND 
ZERO HUNDRED AND ZERO*** 
FULLY-PAID AND NON-ASSESSABLE SHARES OF COMMON STOCK OF 
Aduro Biotech, 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 By-Laws, 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. 
FACSIMILE SIGNATURE TO COME 
President 
DATED DD-MMM-YYYY 
COUNTERSIGNED AND REGISTERED: 
COMPUTERSHARE TRUST COMPANY, N.A. 
TRANSFER AGENT AND REGISTRAR, 
ADURO BIOTECH, INC. 
SEAL 
2011 DELAWARE 
FACSIMILE SIGNATURE TO COME 
Secretary 
By 
AUTHORIZED SIGNATURE 
SECURITY INSTRUCTIONS ON REVERSE 
1234567 
ADURO BIOTECHTM 
PO BOX 43004, Providence, RI 02940-3004 
MR A SAMPLE 
DESIGNATION (IF ANY) 
ADD 1 
ADD 2 
ADD 3 
ADD 4 
CUSIP XXXXXX XX X 
Holder ID XXXXXXXXXX 
Insurance Value 1,000,000.00 
Number of Shares 123456 
DTC 12345678 123456789012345 
Certificate Numbers 
1234567890/1234567890 
1234567890/1234567890 
1234567890/1234567890 
1234567890/1234567890 
1234567890/1234567890 
1234567890/1234567890 
Total Transaction 
Num/No. 
123456 
Denom. 
123456 
Total 
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 ADURO BIOTECH, INC. 
THE COMPANY WILL FURNISH WITHOUT CHARGE TO EACH SHAREHOLDER 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 
UNIF GIFT MIN ACT - Custodian 
(Cust) (Minor) 
TEN ENT - as tenants by the entireties 
under Uniform Gifts to Minors Act 
(State) 
JT TEN - as joint tenants with right of survivorship 
UNIF TRF MIN ACT - Custodian (until age)

and not as tenants in common 
(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. 
Dated: 20 
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.

Signature: 
Signature: 
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 we report the cost basis of certain shares 
acquired after January 1, 2011. If your shares were covered by 
the legislation and you have
sold or transferred the shares and 
requested a specific cost basis calculation method, we have 
processed as requested. If you did not specify a cost basis 
calculation method, we have
defaulted to the first in, first out 
(FIFO) method. Please visit our website or consult your tax 
advisor if you need additional information about cost basis. 
If you do not keep in contact
with us or do not have any 
activity in your account for the time periods specified by state 
law, your property could become subject to state unclaimed 
property laws and transferred to
the appropriate state. 
SECURITY INSTRUCTIONS 
THIS IS WATERMARKED PAPER DO NOT
ACCEPT WITHOUT NOTHING WATERMARK HOLD TO LIGHT TO VERIFY WATERMARK. 
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