Peter Bauer - Sep 7, 2021 Form 4 Insider Report for Mimecast Ltd (MIME)

Role: Chief Executive Officer, Director
Signature: /s/ Robert P. Nault, Attorney-in-Fact
Stock symbol: MIME
Transactions as of: Sep 7, 2021
Transactions value $: -$520,525
Form type: 4
Date filed: 9/8/2021, 05:00 PM
Previous filing: Aug 17, 2021
Next filing: Sep 16, 2021

Transactions Table

Type	Sym	Class	Transaction	Value $	Shares	Change %	* Price $	Shares After	Date	Ownership	Footnotes
transaction	MIME	Ordinary Shares	Sale	-$521K	-7.5K	-0.39%	$69.40	1.91M	Sep 7, 2021	By Rock Trustees Limited	F1, F2, F3
holding	MIME	Ordinary Shares						1.32M	Sep 7, 2021	By Declaration of Trust of Peter Bauer	F4
holding	MIME	Ordinary Shares						9.54K	Sep 7, 2021	By The Bauer Irrevocable Trust - 2020	F5
holding	MIME	Restricted Shares						2.25K	Sep 7, 2021	Direct	F6, F7
holding	MIME	Restricted Shares						9K	Sep 7, 2021	Direct	F6, F8

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

Explanation of Responses:

Id	Content
F1	The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on September 15, 2020.
F2	The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $69.115 - $70.115, inclusive. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote.
F3	These shares are held by Rock Trustees Limited as trustee of the Butterworth Trust (the "Butterworth Trust"), of which the Reporting Person is a beneficiary. As trustee of the Butterworth Trust, Rock Trustees Limited exercises dispositive power over the shares held therein. The Reporting Person disclaims Section 16 beneficial ownership of the shares held by the Butterworth Trust, except to the extent, if any, of his pecuniary interest therein.
F4	These shares are held by the Declaration of Trust of Peter Bauer. The Reporting Person is a beneficiary, and the sole trustee of, the Declaration of Trust of Peter Bauer.
F5	These shares are held by The Bauer Irrevocable Trust - 2020 for the benefit of the Reporting Person's children. The Reporting Person disclaims Section 16 beneficial ownership of the shares held by The Bauer Irrevocable Trust - 2020, except to the extent, if any, of his pecuniary interest therein.
F6	Each restricted share unit represents a contingent right to receive one share of the Issuer's Ordinary Shares.
F7	These restricted share units were granted on April 2, 2018. Twenty-five percent (25%) of the units vested on April 2, 2019, twenty-five percent (25%) of the units vested on April 2, 2020, twenty-five percent (25%) of the units vested on April 2, 2021, and the remainder of the units vest on April 2, 2022, provided that the Reporting Person remains an employee of the Issuer on such vesting date.
F8	These restricted share units were granted on April 1, 2019. Twenty-five percent (25%) of the units vested 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 two (2) 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 April 2, 2018).