Brian Michael Collins - Oct 7, 2024 Form 3 Insider Report for ENTERPRISE BANCORP INC /MA/ (EBTC)

Role: EVP-Principal Subsidiary
Signature: /s/ Joseph R. Lussier attorney-in-fact for for Brian Michael Collins
Stock symbol: EBTC
Transactions as of: Oct 7, 2024
Transactions value $: $0
Form type: 3
Date filed: 10/11/2024, 09:42 AM
Previous filing: Oct 24, 2022

Transactions Table

Type	Sym	Class	Transaction	Value $	Shares	Change %	* Price $	Shares After	Date	Ownership	Footnotes
holding	EBTC	Common Stock						12.9K	Oct 7, 2024	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
holding	EBTC	Option (Right to Buy)							Oct 7, 2024	Common Stock	793	$21.86	Direct	F1
holding	EBTC	Option (Right to Buy)							Oct 7, 2024	Common Stock	364	$30.46	Direct	F2
holding	EBTC	Option (Right to Buy)							Oct 7, 2024	Common Stock	344	$34.33	Direct	F3
holding	EBTC	Option (Right to Buy)							Oct 7, 2024	Common Stock	475	$29.84	Direct	F4
holding	EBTC	Option (Right to Buy)							Oct 7, 2024	Common Stock	491	$28.22	Direct	F5
holding	EBTC	Option (Right to Buy)							Oct 7, 2024	Common Stock	345	$32.73	Direct	F6
holding	EBTC	Option (Right to Buy)							Oct 7, 2024	Common Stock	391	$38.58	Direct	F7

* 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 of the grant date and 50% on the fourth anniversary of the grant date. The first installment vested on March 15, 2018. Options are fully vested.
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 vested on March 21, 2019. Options are fully vested.
F3	Options vest 50% on the second anniversary date of the grant and 50% on the fourth anniversary date of the grant. The first installment vested on March 20, 2020. Options are fully vested.
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 vested on March 19, 2021. Options are fully vested.
F5	Options vest 50% on the second anniversary date of the grant and 50% on the fourth anniversary date of the grant. The first installment vested on March 17, 2022. Options are fully vested.
F6	Options vest 50% on the second anniversary date of the grant and 50% on the fourth anniversary date of the grant. The first installment vested on March 16, 2023.
F7	Options vest 50% on the second anniversary date of the grant and 50% on the fourth anniversary date of the grant. The first installment vested on March 15, 2024.