Heather Bentley - 01 Jul 2021 Form 4 Insider Report for Mimecast Ltd (MIME)

Role: SVP, Customer Success & Supp.
Signature: /s/ Robert P. Nault, Attorney-in-Fact
Issuer symbol: MIME
Transactions as of: 01 Jul 2021
Transactions value $: $0
Form type: 4
Filing time: 06 Jul 2021, 18:00:17 UTC
Next filing: 02 Dec 2021
SEC: View on sec.gov

Transactions Table

Type	Sym	Class	Transaction	Value $	Shares	Change %	* Price $	Shares After	Date	Ownership	Footnotes
transaction	MIME	Restricted Share Units	Award	$0	+9.4K		$0.00	9.4K	01 Jul 2021	Direct	F1, F2
holding	MIME	Ordinary Shares						3.91K	01 Jul 2021	Direct
holding	MIME	Restricted Share Units						18.8K	01 Jul 2021	Direct	F1, F3
holding	MIME	Restricted Share Units						3.37K	01 Jul 2021	Direct	F1, F4
holding	MIME	Restricted Share Units						12.2K	01 Jul 2021	Direct	F1, F5

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

Explanation of Responses:

Id	Content
F1	Each restricted share unit represents a contingent right to receive one share of the Issuer's Ordinary Shares.
F2	These restricted share units were granted on July 1, 2021. Twenty-five percent (25%) of the units vest on July 1, 2022 and the remainder of the units vest on an annual basis over the next three (3) years, provided that the Reporting Person remains an employee of the Issuer on each such vesting date.
F3	These restricted share units were granted on December 2, 2019. Twenty-five percent (25%) of the units vested on December 1, 2020, and the remainder of the units vest on an annual basis over the next three (3) years, provided that the Reporting Person remains an employee of the Issuer on each such vesting date.
F4	These restricted share units were granted on April 1, 2020. Twenty-five percent (25%) of the units vested on April 1, 2021, and the remainder of the units vest on an annual basis over the next three (3) years, provided that the Reporting Person remains an employee of the Issuer on each such vesting date.
F5	These restricted share units were granted on April 1, 2021. Twenty-five percent (25%) of the units vest on April 1, 2022, and the remainder of the units vest on an annual basis over the next three (3) years, provided that the Reporting Person remains an employee of the Issuer on each such vesting date.

Remarks:

Exhibit 24 Power of Attorney (incorporated by reference to Power of Attorney filed as Exhibit 24 to Form 3 filed by the Reporting Person on November 25, 2019).