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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	2015-02-09	5,800	$25.26	206,562	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	2015-02-09	200	$25.85	206,362	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	2015-02-09	2,000	$25.27	54,000	No	4	S	Indirect	By Black 2014 Family Heritage Trust
Common Stock	Disposition	2015-02-09	2,000	$25.28	54,000	No	4	S	Indirect	By Black 2013 Family Heritage Trust
Common Stock	Disposition	2015-02-09	12,500	$0.00	276,215	No	5	G	Direct
Common Stock	Acquisiton	2015-02-09	12,500	$0.00	218,862	No	5	G	Indirect	Alan J. Black and Linda J. Black, Trustees of Black Family Trust - 2001 U/I DTD. November 26, 2001

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	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
No	5	G	Direct
No	5	G	Indirect	Alan J. Black and Linda J. Black, Trustees of Black Family Trust - 2001 U/I DTD. November 26, 2001

Footnotes

This sale was effected pursuant to Rule 10b5-1 trading plans adopted by the Reporting Person.
This sale price represents the weighted average sale price of the shares sold ranging from $24.82 to $25.81 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.
This sale price represents the weighted average sale price of the shares sold ranging from $24.82 to $25.74 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.