Michael John Gallagher - Mar 15, 2022 Form 4 Insider Report for ENTERPRISE BANCORP INC /MA/ (EBTC)

Role: EVP-Principal Subsidiary
Signature: /s/ John P. Clancy, Jr. as attorney-in-fact for Michael John Gallagher
Stock symbol: EBTC
Transactions as of: Mar 15, 2022
Transactions value $: $0
Form type: 4
Date filed: 3/17/2022, 12:57 PM
Previous filing: Jan 31, 2022
Next filing: Jul 28, 2022

Transactions Table

Type	Sym	Class	Transaction	Value $	Shares	Change %	* Price $	Shares After	Date	Ownership	Footnotes
transaction	EBTC	Common Stock	Award	$0	+826	+43.38%	$0.00	2.73K	Mar 15, 2022	Direct	F1, F2
holding	EBTC	Common Stock						9.52K	Mar 15, 2022	By Trust	F3

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	+391		$0.00	391	Mar 15, 2022	Common Stock	391	$38.58	Direct	F4

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

Explanation of Responses:

Id	Content
F1	Includes 6.0455 shares acquired through the Issuer's Dividend Reinvestment Plan on 3/1/2022.
F2	Includes 2.0578 shares acquired through the Issuer's Employee Stock Purchase Plan on 3/4/2022.
F3	Includes 49.9596 shares acquired through the Issuer's Dividend Reinvestment Plan on 3/1/2022.
F4	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.