Ownership Submission
FORM 3
 UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

INITIAL STATEMENT OF BENEFICIAL OWNERSHIP OF SECURITIES

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934, Section 17(a) of the Public Utility Holding Company Act of 1935 or Section 30(h) of the Investment Company Act of 1940
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(Print or Type Responses)
1. Name and Address of Reporting Person *
  Titterton Jeffrey J
 2. Date of Event Requiring Statement (Month/Day/Year)
02/01/2018		 3. Issuer Name and Ticker or Trading Symbol
Zendesk, Inc. [ZEN]
(Last)
(First)
(Middle)
1019 MARKET STREET		 4. Relationship of Reporting Person(s) to Issuer
(Check all applicable)
_____ Director _____ 10% Owner
__X__ Officer (give title below) _____ Other (specify below)
SVP, Marketing
 5. If Amendment, Date Original Filed(Month/Day/Year)
02/08/2018
(Street)

SAN FRANCISCO, CA 94103		 6. Individual or Joint/Group Filing(Check Applicable Line)
_X_ Form filed by One Reporting Person
___ Form filed by More than One Reporting Person
(City)
(State)
(Zip)
Table I - Non-Derivative Securities Beneficially Owned
1.Title of Security
(Instr. 4)		 2. Amount of Securities Beneficially Owned
(Instr. 4)		 3. Ownership Form: Direct (D) or Indirect (I)
(Instr. 5)		 4. Nature of Indirect Beneficial Ownership
(Instr. 5)

Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly. SEC 1473 (7-02)
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Table II - Derivative Securities Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security
(Instr. 4)		 2. Date Exercisable and Expiration Date
(Month/Day/Year)		 3. Title and Amount of Securities Underlying Derivative Security
(Instr. 4)		 4. Conversion or Exercise Price of Derivative Security 5. Ownership Form of Derivative Security: Direct (D) or Indirect (I)
(Instr. 5)		 6. Nature of Indirect Beneficial Ownership
(Instr. 5)
Date Exercisable Expiration Date Title Amount or Number of Shares
Stock Option (Right to Buy)   (1) 05/16/2027 Common Stock 70,000 $ 27.34 D  
Restricted Stock Unit   (2) 08/01/2024 Common Stock 60,000 $ (3) D  

Reporting Owners

Reporting Owner Name / Address Relationships
Director 10% Owner Officer Other
Titterton Jeffrey J
1019 MARKET STREET
SAN FRANCISCO, CA 94103		       SVP, Marketing  

Signatures

/s/ Hasani Caraway via Power-of-Attorney for Jeff J. Titterton 02/12/2018
**Signature of Reporting Person Date

Explanation of Responses:

* If the form is filed by more than one reporting person, see Instruction 5(b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations. See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
(1) 1/4th of the shares issuable pursuant to the option shall vest one year after the vesting commencement date of May 15, 2017 and an additional 1/48th of the shares issuable pursuant to the option shall vest each month thereafter, subject to the Reporting Person's continuous service to the Issuer on each such date. Unvested shares are subject to acceleration upon the occurrence of certain events.
(2) 1/4th of the shares issuable pursuant to the restricted stock units shall vest one year after the vesting commencement date of May 15, 2017 and an additional 1/48th of the shares issuable pursuant to the restricted stock units shall vest each month thereafter, subject to the Reporting Person's continuous service to the Issuer on each such date. Unvested shares are subject to acceleration upon the occurrence of certain events.
(3) Restricted stock units convert into common stock on a one-for-one basis.
 
Remarks:
Exhibit 24 - Power of Attorney - This Amendment is being filed to attach the Reporting Person's Power of Attorney to the Form 3 originally filed on February 8, 2018.  The remainder of the form remains unchanged.

Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, See Instruction 6 for procedure.

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