Richard W. Main - Mar 8, 2022 Form 4 Insider Report for ENTERPRISE BANCORP INC /MA/ (EBTC)

Role: President, Director
Signature: /s/ John P. Clancy, Jr. as attorney-in-fact for Richard W. Main
Stock symbol: EBTC
Transactions as of: Mar 8, 2022
Transactions value $: $0
Form type: 4
Date filed: 3/17/2022, 02:59 PM
Previous filing: Jan 31, 2022
Next filing: Jul 25, 2022

Transactions Table

Type	Sym	Class	Transaction	Value $	Shares	Change %	* Price $	Shares After	Date	Ownership	Footnotes
transaction	EBTC	Common Stock	Gift	$0	-2.5K	-1.1%	$0.00	225K	Mar 8, 2022	Direct
transaction	EBTC	Common Stock	Award	$0	+1.92K	+0.85%	$0.00	227K	Mar 15, 2022	Direct

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	EBTC	Stock Option (Right to Buy)	Award	$0	+908		$0.00	908	Mar 15, 2022	Common Stock	908	$38.58	Direct	F1

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

Explanation of Responses:

Id	Content
F1	Options vest 50% on the second anniversary date of the grant and 50% on the fourth anniversary date of the grant. The first installment vests on March 15, 2024.