CHRISTOPHER EDWARD MCCLOSKEY - 18 May 2021 Form 4 Insider Report for DATTO HOLDING CORP.

Role: Chief Customer Officer
Signature: /s/ Adam Collicelli, by Power of Attorney
Issuer symbol: N/A
Transactions as of: 18 May 2021
Net transactions value: -$812,000
Form type: 4
Filing time: 20 May 2021, 16:35:34 UTC
Next filing: 05 Jan 2022
SEC: View on sec.gov

Transactions Table

Type	Sym	Class	Transaction	Value $	Shares	Change %	* Price $	Shares After	Date	Ownership	Footnotes
transaction	MSP	Common Stock	Options Exercise	$500,000	+50,000		$10.00	50,000	18 May 2021	Direct	F1
transaction	MSP	Common Stock	Sale	$1,312,000	-50,000	-100%	$26.24	0	18 May 2021	Direct	F1, 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	MSP	Options (Right to Buy)	Options Exercise	$0	-50,000	-6.7%	$0.000000	700,000	18 May 2021	Common Stock	50,000	$10.00	Direct	F3

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

Explanation of Responses:

Id	Content
F1	The exercise and sale reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan previously adopted by the Reporting Person on December 16, 2020.
F2	This transaction was executed in multiple trades at prices ranging from $25.81 to $26.49 per share. The price reported reflects the weighted average sale price. Upon request by the Issuer, any security holder of the Issuer or the staff of the SEC, the Reporting Person undertakes to provide full information regarding the number of shares sold at each separate price within the range set forth in this footnote.
F3	These options vested 25% on November 1, 2019 and vest quarterly thereafter at a rate of 6.25% as long as such individual continues to be employed as of each respective vest date.