Chester J. Szablak JR - 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 Chester J. Szablak, Jr.
Stock symbol: EBTC
Transactions as of: Mar 15, 2022
Transactions value $: $0
Form type: 4
Date filed: 3/17/2022, 03:22 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	Award	$0	+826	+2.38%	$0.00	35.5K	Mar 15, 2022	Direct	F1

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	F2

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

Explanation of Responses:

Id	Content
F1	Includes 1.9160 shares acquired through the Issuer's Employee Stock Purchase Plan on 3/4/22.
F2	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.