John Geschke - Jul 15, 2021 Form 4 Insider Report for Zendesk, Inc. (ZEN)

Role: Chief of Staff
Signature: /s/ Steven Chen via Power-of-Attorney for John Geschke
Stock symbol: ZEN
Transactions as of: Jul 15, 2021
Transactions value $: -$85,737
Form type: 4
Date filed: 7/19/2021, 08:07 PM
Previous filing: Jul 8, 2021
Next filing: Aug 12, 2021

Transactions Table

Type	Sym	Class	Transaction	Value $	Shares	Change %	* Price $	Shares After	Date	Ownership	Footnotes
transaction	ZEN	Common Stock	Options Exercise		+386	+1.08%		36.3K	Jul 15, 2021	Direct	F1
transaction	ZEN	Common Stock	Tax liability	-$26.4K	-192	-0.53%	$137.62	36.1K	Jul 15, 2021	Direct	F2
transaction	ZEN	Common Stock	Options Exercise		+306	+0.85%		36.4K	Jul 15, 2021	Direct	F1
transaction	ZEN	Common Stock	Tax liability	-$20.9K	-152	-0.42%	$137.62	36.2K	Jul 15, 2021	Direct	F2
transaction	ZEN	Common Stock	Options Exercise		+340	+0.94%		36.6K	Jul 15, 2021	Direct	F1
transaction	ZEN	Common Stock	Tax liability	-$23.3K	-169	-0.46%	$137.62	36.4K	Jul 15, 2021	Direct	F2
transaction	ZEN	Common Stock	Options Exercise		+221	+0.61%		36.6K	Jul 15, 2021	Direct	F1
transaction	ZEN	Common Stock	Tax liability	-$15.1K	-110	-0.3%	$137.62	36.5K	Jul 15, 2021	Direct	F2

Derivative Securities (e.g., puts, calls, warrants, options, convertible securities)

Type	Sym	Class	Transaction	Value $	Shares	Change %	* Price $	Shares After	Date	Underlying Class	Amount	Exercise Price	Ownership	Footnotes
transaction	ZEN	Restricted Stock Unit	Options Exercise	$0	-386	-14.3%	$0.00	2.31K	Jul 15, 2021	Common Stock	386		Direct	F1, F3
transaction	ZEN	Restricted Stock Unit	Options Exercise	$0	-306	-5.26%	$0.00	5.51K	Jul 15, 2021	Common Stock	306		Direct	F1, F4
transaction	ZEN	Restricted Stock Unit	Options Exercise	$0	-340	-3.13%	$0.00	10.5K	Jul 15, 2021	Common Stock	340		Direct	F1, F5
transaction	ZEN	Restricted Stock Unit	Options Exercise	$0	-221	-2.27%	$0.00	9.52K	Jul 15, 2021	Common Stock	221		Direct	F1, F6

* An asterisk sign (*) next to the price indicates that the price is likely invalid.

Explanation of Responses:

Id	Content
F1	Restricted stock units convert into common stock on a one-for-one basis.
F2	Represents the number of shares withheld by the Issuer in satisfaction of tax withholding obligations in connection with the vesting of the restricted stock units listed in Table II. Such withholding is mandated by an election of the Issuer made in advance and does not represent a discretionary trade by the Reporting Person.
F3	1/48th of the shares issuable pursuant to the restricted stock units shall vest each month after the vesting commencement date of January 15, 2018, 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.
F4	1/48th of the shares issuable pursuant to the restricted stock units shall vest each month after the vesting commencement date of January 15, 2019, 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.
F5	1/48th of the shares issuable pursuant to the restricted stock units shall vest each month after the vesting commencement date of February 15, 2020, 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.
F6	1/48th of the shares issuable pursuant to the restricted stock units shall vest each month after the vesting commencement date of February 15, 2021, 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.