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Filing Details

Issuer

Cik	Name	Symbol	Sector (SIC)	IRS No
1463172	Zendesk Inc.	ZEN	Services-Computer Processing & Data Preparation (7374)	000000000

Insiders

Cik	Name	Reported Address	Insider Title	Director	Officer	Large Shareholder	Other
1211433	J Alan Black	1019 Market Street San Francisco CA 94103	Svp And Cfo	No	Yes	No	No

Reported Non-Derivative Transactions

Sec. Name	Acquisiton - Disposition	Date	Amount	Price	Remaning Holdings	Equity Swap Involved	Form Type	Code	Nature of Ownership	Explanation
Common Stock	Disposition	2014-12-08	6,000	$23.48	285,871	No	4	S	Indirect	Alan J. Black and Linda J. Black, Trustees of Black Family Trust - 2001 U/I DTD. November 26, 2001
Common Stock	Disposition	2014-12-08	2,000	$23.46	88,000	No	4	S	Indirect	By Black 2014 Family Heritage Trust
Common Stock	Disposition	2014-12-08	2,000	$23.45	88,000	No	4	S	Indirect	By Black 2013 Family Heritage Trust

Equity Swap Involved	Form Type	Code	Nature of Ownership	Explanation
No	4	S	Indirect	Alan J. Black and Linda J. Black, Trustees of Black Family Trust - 2001 U/I DTD. November 26, 2001
No	4	S	Indirect	By Black 2014 Family Heritage Trust
No	4	S	Indirect	By Black 2013 Family Heritage Trust

Reported Non-Derivative Holdings

Sec. Name	Remaning Holdings	Nature of Ownership	Explanation
Common Stock	321,006	Direct

Footnotes

This sale was effected pursuant to Rule 10b5-1 trading plans adopted by the Reporting Person.
The sale price reported in column 4 of Table 1 represents the weighted average sale price of the shares sold ranging from $23.24 to $23.92 per share. Upon request by the Commission staff, the Issuer, or a security holder of the Issuer, the Reporting Person will provide full information regarding the number of shares sold at each separate price.
The sale price reported in column 4 of Table 1 represents the weighted average sale price of the shares sold ranging from $23.22 to $23.81 per share. Upon request by the Commission staff, the Issuer, or a security holder of the Issuer, the Reporting Person will provide full information regarding the number of shares sold at each separate price.