EBTC / Enterprise Bancorp, Inc. - Документы SEC, Годовой отчет, Доверенное заявление

Энтерпрайз Банкорп, Инк.
US ˙ NasdaqGS ˙ US2936681095
ЭТОТ СИМВОЛ БОЛЬШЕ НЕ АКТИВЕН

Основная статистика
CIK 1018399
SEC Filings
All companies that sell securities in the United States must register with the Securities and Exchange Commission (SEC) and file reports on a regular basis. These reports include company annual reports (10K, 10Q), news updates (8K), investor presentations (found in 8Ks), insider trades (form 4), ownership reports (13D, and 13G), and reports related to the specific securities sold, such as registration statements and prospectus. This page shows recent SEC filings related to Enterprise Bancorp, Inc.
SEC Filings (Chronological Order)
На этой странице представлен полный хронологический список документов SEC, за исключением документов о собственности, которые мы предоставляем в других местах.
July 11, 2025 15-12G

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 15 CERTIFICATION AND NOTICE OF TERMINATION OF REGISTRATION UNDER SECTION 12(g) OF THE SECURITIES EXCHANGE ACT OF 1934 OR SUSPENSION OF DUTY TO FILE REPORTS UNDER SECTIONS 13

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 15 CERTIFICATION AND NOTICE OF TERMINATION OF REGISTRATION UNDER SECTION 12(g) OF THE SECURITIES EXCHANGE ACT OF 1934 OR SUSPENSION OF DUTY TO FILE REPORTS UNDER SECTIONS 13 AND 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934. Commission File Number: 001-33912 ENTERPRISE BANCORP, INC. (Independent Bank Corp., as successor by

July 1, 2025 S-8 POS

As filed with the Securities and Exchange Commission on July 1, 2025

As filed with the Securities and Exchange Commission on July 1, 2025 Registration No.

July 1, 2025 POS AM

As filed with the Securities and Exchange Commission on July 1, 2025

As filed with the Securities and Exchange Commission on July 1, 2025 Registration No.

July 1, 2025 8-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of Earliest Event Reported): July 1, 2025 (July 1, 2025) ENTER

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of Earliest Event Reported): July 1, 2025 (July 1, 2025) ENTERPRISE BANCORP, INC. (exact name of registrant as specified in charter) Massachusetts 001-33912 04-3308902 (State or Other Jurisdiction (Commission (IR

July 1, 2025 S-8 POS

As filed with the Securities and Exchange Commission on July 1, 2025

As filed with the Securities and Exchange Commission on July 1, 2025 Registration No.

July 1, 2025 S-8 POS

As filed with the Securities and Exchange Commission on July 1, 2025

As filed with the Securities and Exchange Commission on July 1, 2025 Registration No.

July 1, 2025 POS AM

As filed with the Securities and Exchange Commission on July 1, 2025

As filed with the Securities and Exchange Commission on July 1, 2025 Registration No.

July 1, 2025 S-8 POS

As filed with the Securities and Exchange Commission on July 1, 2025

As filed with the Securities and Exchange Commission on July 1, 2025 Registration No.

June 25, 2025 425

Filed by Enterprise Bancorp, Inc. pursuant to Rule 425 under the Securities Act of 1933 and deemed filed pursuant to Rule 14a-12 under the Securities Exchange Act of 1934 Subject Company: Enterprise Bancorp, Inc. SEC File No.: 001-33912 Date: June 25

socialmediapost06252025f Filed by Enterprise Bancorp, Inc. pursuant to Rule 425 under the Securities Act of 1933 and deemed filed pursuant to Rule 14a-12 under the Securities Exchange Act of 1934 Subject Company: Enterprise Bancorp, Inc. SEC File No.: 001-33912 Date: June 25, 2025 The following communication was made available by Enterprise Bancorp, Inc., parent company of Enterprise Bank and Trus

June 18, 2025 425

Filed by Enterprise Bancorp, Inc. pursuant to Rule 425 under the Securities Act of 1933 and deemed filed pursuant to Rule 14a-12 under the Securities Exchange Act of 1934 Subject Company: Enterprise Bancorp, Inc. SEC File No.: 001-33912 Date: June 18

socialmediapost06182025f Filed by Enterprise Bancorp, Inc. pursuant to Rule 425 under the Securities Act of 1933 and deemed filed pursuant to Rule 14a-12 under the Securities Exchange Act of 1934 Subject Company: Enterprise Bancorp, Inc. SEC File No.: 001-33912 Date: June 18, 2025 The following communication was made available by Enterprise Bancorp, Inc., parent company of Enterprise Bank and Trus

June 11, 2025 425

Filed by Enterprise Bancorp, Inc. pursuant to Rule 425 under the Securities Act of 1933 and deemed filed pursuant to Rule 14a-12 under the Securities Exchange Act of 1934 Subject Company: Enterprise Bancorp, Inc. SEC File No.: 001-33912 Date: June 11

socialmediapost06112025f Filed by Enterprise Bancorp, Inc. pursuant to Rule 425 under the Securities Act of 1933 and deemed filed pursuant to Rule 14a-12 under the Securities Exchange Act of 1934 Subject Company: Enterprise Bancorp, Inc. SEC File No.: 001-33912 Date: June 11, 2025 The following communication was made available by Enterprise Bancorp, Inc., parent company of Enterprise Bank and Trus

June 4, 2025 425

Filed by Enterprise Bancorp, Inc. pursuant to Rule 425 under the Securities Act of 1933 and deemed filed pursuant to Rule 14a-12 under the Securities Exchange Act of 1934 Subject Company: Enterprise Bancorp, Inc. SEC File No.: 001-33912 Date: June 4,

socialmediapost6-4x25xfi Filed by Enterprise Bancorp, Inc. pursuant to Rule 425 under the Securities Act of 1933 and deemed filed pursuant to Rule 14a-12 under the Securities Exchange Act of 1934 Subject Company: Enterprise Bancorp, Inc. SEC File No.: 001-33912 Date: June 4, 2025 The following communication was made available by Enterprise Bancorp, Inc., parent company of Enterprise Bank and Trust

June 4, 2025 8-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of Earliest Event Reported): June 4, 2025 (June 4, 2025) ENTER

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of Earliest Event Reported): June 4, 2025 (June 4, 2025) ENTERPRISE BANCORP, INC. (exact name of registrant as specified in charter) Massachusetts 001-33912 04-3308902 (State or Other Jurisdiction (Commission (IR

June 4, 2025 EX-99.1

INDEPENDENT BANK CORP. AND ENTERPRISE BANCORP, INC. ANNOUNCE THE RECEIPT OF ALL REGULATORY APPROVALS AND ANTICIPATED CLOSING DATE

Exhibit 99.1 Joint News Release INDEPENDENT BANK CORP. AND ENTERPRISE BANCORP, INC. ANNOUNCE THE RECEIPT OF ALL REGULATORY APPROVALS AND ANTICIPATED CLOSING DATE Rockland, Massachusetts and Lowell, Massachusetts, June 4, 2025. Independent Bank Corp. (NASDAQ: INDB) (“Independent”), parent of Rockland Trust Company (“Rockland Trust”), and Enterprise Bancorp, Inc. (NASDAQ: EBTC) (“Enterprise”), paren

May 28, 2025 425

Filed by Enterprise Bancorp, Inc. pursuant to Rule 425 under the Securities Act of 1933 and deemed filed pursuant to Rule 14a-12 under the Securities Exchange Act of 1934 Subject Company: Enterprise Bancorp, Inc. SEC File No.: 001-33912 Date: May 28,

form425socialmediapost5- Filed by Enterprise Bancorp, Inc. pursuant to Rule 425 under the Securities Act of 1933 and deemed filed pursuant to Rule 14a-12 under the Securities Exchange Act of 1934 Subject Company: Enterprise Bancorp, Inc. SEC File No.: 001-33912 Date: May 28, 2025 The following communication was made available by Enterprise Bancorp, Inc., parent company of Enterprise Bank and Trust

May 15, 2025 425

Filed by Enterprise Bancorp, Inc. pursuant to Rule 425 under the Securities Act of 1933 and deemed filed pursuant to Rule 14a-12 under the Securities Exchange Act of 1934 Subject Company: Enterprise Bancorp, Inc. SEC File No.: 001-33912 Date: May 15,

socialmediapost5-15x25fi Filed by Enterprise Bancorp, Inc. pursuant to Rule 425 under the Securities Act of 1933 and deemed filed pursuant to Rule 14a-12 under the Securities Exchange Act of 1934 Subject Company: Enterprise Bancorp, Inc. SEC File No.: 001-33912 Date: May 15, 2025 The following communication was made available by Enterprise Bancorp, Inc., parent company of Enterprise Bank and Trust

May 7, 2025 8-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of Earliest Event Reported): May 7, 2025 (May 6, 2025) ENTERPR

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of Earliest Event Reported): May 7, 2025 (May 6, 2025) ENTERPRISE BANCORP, INC. (Exact name of registrant as specified in charter) Massachusetts 001-33912 04-3308902 (State or other jurisdiction (Commission (IRS

May 7, 2025 425

Filed by Enterprise Bancorp, Inc. pursuant to Rule 425 under the Securities Act of 1933 and deemed filed pursuant to Rule 14a-12 under the Securities Exchange Act of 1934 Subject Company: Enterprise Bancorp, Inc. SEC File No.: 001-33912 Date: May 7,

socialmediapost5-7x25fin Filed by Enterprise Bancorp, Inc. pursuant to Rule 425 under the Securities Act of 1933 and deemed filed pursuant to Rule 14a-12 under the Securities Exchange Act of 1934 Subject Company: Enterprise Bancorp, Inc. SEC File No.: 001-33912 Date: May 7, 2025 The following communication was made available by Enterprise Bancorp, Inc., parent company of Enterprise Bank and Trust

May 6, 2025 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 10-Q ☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended March 31, 2025 ☐ TRANSITION REPORT PURSUANT TO

Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 10-Q ☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended March 31, 2025 or ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission File Number: 001-33912 En

April 30, 2025 425

Filed by Enterprise Bancorp, Inc. pursuant to Rule 425 under the Securities Act of 1933 and deemed filed pursuant to Rule 14a-12 under the Securities Exchange Act of 1934 Subject Company: Enterprise Bancorp, Inc. SEC File No.: 001-33912 Date: April 3

socialmediapost4-30x25xf Filed by Enterprise Bancorp, Inc. pursuant to Rule 425 under the Securities Act of 1933 and deemed filed pursuant to Rule 14a-12 under the Securities Exchange Act of 1934 Subject Company: Enterprise Bancorp, Inc. SEC File No.: 001-33912 Date: April 30, 2025 The following communication was made available by Enterprise Bancorp, Inc., parent company of Enterprise Bank and Tru

April 23, 2025 425

Filed by Enterprise Bancorp, Inc. pursuant to Rule 425 under the Securities Act of 1933 and deemed filed pursuant to Rule 14a-12 under the Securities Exchange Act of 1934 Subject Company: Enterprise Bancorp, Inc. SEC File No.: 001-33912 Date: April 2

socialmediapost4 Filed by Enterprise Bancorp, Inc. pursuant to Rule 425 under the Securities Act of 1933 and deemed filed pursuant to Rule 14a-12 under the Securities Exchange Act of 1934 Subject Company: Enterprise Bancorp, Inc. SEC File No.: 001-33912 Date: April 23, 2025 The following communication was made available by Enterprise Bancorp, Inc., parent company of Enterprise Bank and Trust Compa

April 17, 2025 EX-99.1

Increase / (Decrease)

Exhibit 99.1 Contact Info: Joseph R. Lussier, Executive Vice President, Chief Financial Officer and Treasurer (978) 656-5578 Enterprise Bancorp, Inc. Announces First Quarter Financial Results LOWELL, MA, April 17, 2025 (GLOBE NEWSWIRE) - Enterprise Bancorp, Inc. ("Enterprise") (NASDAQ: EBTC), parent of Enterprise Bank, announced its financial results for the three months ended March 31, 2025. Net

April 17, 2025 8-K

Financial Statements and Exhibits, Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of Earliest Event Reported): April 17, 2025 (April 17, 2025) ENTERPRISE BANCORP, INC. (exact name of registrant as specified in charter) Massachusetts 001-33912 04-3308902 (State or Other Jurisdiction (Commission

April 16, 2025 425

Filed by Enterprise Bancorp, Inc. pursuant to Rule 425 under the Securities Act of 1933 and deemed filed pursuant to Rule 14a-12 under the Securities Exchange Act of 1934 Subject Company: Enterprise Bancorp, Inc. SEC File No.: 001-33912 Date: April 1

socialmediapost4-16x25 Filed by Enterprise Bancorp, Inc. pursuant to Rule 425 under the Securities Act of 1933 and deemed filed pursuant to Rule 14a-12 under the Securities Exchange Act of 1934 Subject Company: Enterprise Bancorp, Inc. SEC File No.: 001-33912 Date: April 16, 2025 The following communication was made available by Enterprise Bancorp, Inc., parent company of Enterprise Bank and Trust

April 15, 2025 8-K

Financial Statements and Exhibits, Other Events

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of Earliest Event Reported): April 15, 2025 (April 15, 2025) ENTERPRISE BANCORP, INC. (exact name of registrant as specified in charter) Massachusetts 001-33912 04-3308902 (State or Other Jurisdiction (Commission

April 15, 2025 EX-99

Contact Info: Joseph R. Lussier, Executive Vice President, Chief Financial Officer and Treasurer (978) 656-5578

Exhibit 99 Contact Info: Joseph R. Lussier, Executive Vice President, Chief Financial Officer and Treasurer (978) 656-5578 Enterprise Bancorp, Inc. Announces Quarterly Dividend LOWELL, Mass., April 15, 2025 (GLOBE NEWSWIRE) - Enterprise Bancorp, Inc. (the "Company") (NASDAQ:EBTC) On April 15, 2025, the Board of Directors of Enterprise Bancorp, Inc. declared a quarterly dividend of $0.25 per share

April 9, 2025 425

Filed by Enterprise Bancorp, Inc. pursuant to Rule 425 under the Securities Act of 1933 and deemed filed pursuant to Rule 14a-12 under the Securities Exchange Act of 1934 Subject Company: Enterprise Bancorp, Inc. SEC File No.: 001-33912 Date: April 9

Filed by Enterprise Bancorp, Inc. pursuant to Rule 425 under the Securities Act of 1933 and deemed filed pursuant to Rule 14a-12 under the Securities Exchange Act of 1934 Subject Company: Enterprise Bancorp, Inc. SEC File No.: 001-33912 Date: April 9, 2025 The following communication was made available by Enterprise Bancorp, Inc., parent company of Enterprise Bank and Trust Company (commonly refer

April 4, 2025 425

Filed by Enterprise Bancorp, Inc. pursuant to Rule 425 under the Securities Act of 1933 and deemed filed pursuant to Rule 14a-12 under the Securities Exchange Act of 1934 Subject Company: Enterprise Bancorp, Inc. SEC File No.: 001-33912 Date: April 4

Filed by Enterprise Bancorp, Inc. pursuant to Rule 425 under the Securities Act of 1933 and deemed filed pursuant to Rule 14a-12 under the Securities Exchange Act of 1934 Subject Company: Enterprise Bancorp, Inc. SEC File No.: 001-33912 Date: April 4, 2025 The following communication was made available by Enterprise Bancorp, Inc., parent company of Enterprise Bank and Trust Company (commonly refer

April 4, 2025 8-K

Submission of Matters to a Vote of Security Holders

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of Earliest Event Reported): April 4, 2025 (April 3, 2025) ENTERPRISE BANCORP, INC. (Exact name of registrant as specified in charter) Massachusetts 001-33912 04-3308902 (State or other jurisdiction (Commission (

April 1, 2025 DEF 14A

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A (Rule 14a-101) INFORMATION REQUIRED IN PROXY STATEMENT SCHEDULE 14A INFORMATION Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Ame

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A (Rule 14a-101) INFORMATION REQUIRED IN PROXY STATEMENT SCHEDULE 14A INFORMATION Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No. ) Filed by the Registrant þ Filed by a Party other than the Registrant ¨ Check the appropriate box: ¨ Preliminary Proxy Statement ¨ Confide

March 25, 2025 8-K

Other Events

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of Earliest Event Reported): March 25, 2025 (March 25, 2025) ENTERPRISE BANCORP, INC. (Exact name of registrant as specified in charter) Massachusetts 001-33912 04-3308902 (State or other jurisdiction (Commission

March 24, 2025 8-K

Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers, Financial Statements and Exhibits

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of Earliest Event Reported): March 24, 2025 (March 18, 2025) ENTERPRISE BANCORP, INC. (Exact name of registrant as specified in charter) Massachusetts 001-33912 04-3308902 (State or other jurisdiction (Commission

March 24, 2025 EX-10.1

Enterprise Bank 2025 Variable Compensation Incentive Plan, incorporated by reference to Exhibit 10.1 to the Company’s Current Report on Form 8-K filed on March 24, 2025 (File No. 001-33912).

Exhibit 10.1 2025 Variable Compensation Incentive Plan Purpose and Objective The 2025 Variable Compensation Incentive Plan (the "Plan") incents and rewards for Bank and Individual performance. Participant Eligibility Regular team members who do not participate in an individual sales incentive plan or an individual commission plan are eligible to participate in the Plan. Temporary and co-operative

March 7, 2025 EX-21

Subsidiaries of the Registrant.

EXHIBIT 21.0 Subsidiaries of Registrant Subsidiary State of Jurisdiction Business Name Enterprise Bank and Trust Company* Massachusetts Enterprise Bank Enterprise Wealth Services LLC** Delaware Enterprise Wealth Services Enterprise Security Corporation** Massachusetts Same Enterprise Security Corporation (II)** Massachusetts Same Enterprise Security Corporation (III)** Massachusetts Same EBTC NMTC

March 7, 2025 EX-19.1

Enterprise Bancorp, Inc. Insider Trading Policy.

Review Date: 12/10/2024 Statement of Insider Trading Policy 1 Confidential: For Bank Use Only Table of Contents 1.

March 7, 2025 10-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 10-K ☒ ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the fiscal year ended December 31, 2024 ☐ TRANSITION REPORT PURSUANT TO SECTI

Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 10-K ☒ ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the fiscal year ended December 31, 2024 OR ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission file number 001-33912 Enterpri

February 19, 2025 DEFM14A

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No. )

Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No. ) Filed by the Registrant ☒ Filed by a Party other than the Registrant ☐ Check the appropriate box: ☐ Preliminary Proxy Statement ☐ Confidential, for Use of the Commission Only (as permitted by Rule 14

January 28, 2025 8-K

Financial Statements and Exhibits, Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of Earliest Event Reported): January 28, 2025 (January 28, 2025) ENTERPRISE BANCORP, INC. (exact name of registrant as specified in charter) Massachusetts 001-33912 04-3308902 (State or Other Jurisdiction (Commis

January 28, 2025 425

2

Filed by Enterprise Bancorp, Inc. pursuant to Rule 425 under the Securities Act of 1933 and deemed filed pursuant to Rule 14a-12 under the Securities Exchange Act of 1934 Subject Company: Enterprise Bancorp, Inc. SEC File No.: 001-33912 Date: January 28, 2025 Dear Shareholder, We extend to you our sincerest wishes for a healthy, happy, and prosperous year ahead. We are pleased to share our unaudit

January 28, 2025 EX-99.1

Increase / (Decrease)

Exhibit 99.1 Filed by Enterprise Bancorp, Inc. pursuant to Rule 425 under the Securities Act of 1933 and deemed filed pursuant to Rule 14a-12 under the Securities Exchange Act of 1934 Subject Company: Enterprise Bancorp, Inc. SEC File No.: 001-33912 Date: January 28, 2025 1 Contact Info: Joseph R. Lussier, Executive Vice President, Chief Financial Officer and Treasurer (978) 656-5578 Enterprise Ba

January 21, 2025 EX-99

Contact Info: Joseph R. Lussier, Executive Vice President, Chief Financial Officer and Treasurer (978) 656-5578

Exhibit 99 Contact Info: Joseph R. Lussier, Executive Vice President, Chief Financial Officer and Treasurer (978) 656-5578 Enterprise Bancorp, Inc. Announces Quarterly Dividend LOWELL, Mass., January 21, 2025 (GLOBE NEWSWIRE) - Enterprise Bancorp, Inc. (the "Company") (NASDAQ:EBTC) On January 21, 2025, the Board of Directors of Enterprise Bancorp, Inc. declared a quarterly dividend of $0.25 per sh

January 21, 2025 8-K

Financial Statements and Exhibits, Other Events

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of Earliest Event Reported): January 21, 2025 (January 21, 2025) ENTERPRISE BANCORP, INC. (exact name of registrant as specified in charter) Massachusetts 001-33912 04-3308902 (State or Other Jurisdiction (Commis

December 20, 2024 EX-10.1

Retention Bonus Agreement, dated December 17, 2024, by and between Enterprise Bank and Trust Company and Joseph R. Lussier.

Exhibit 10.1 ENTERPRISE BANK AND TRUST COMPANY RETENTION BONUS AGREEMENT Congratulations! Due to your current hard work, the resulting success of Enterprise Bank and Trust Company (the "Bank"), and your continuing hard work and dedication, the Bank is pleased to announce that you are eligible for a $100,000.00 cash retention bonus pursuant to the terms of this Retention Bonus Agreement (this "Rete

December 20, 2024 8-K

Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers, Financial Statements and Exhibits

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of Earliest Event Reported): December 20, 2024 (December 17, 2024) ENTERPRISE BANCORP, INC. (Exact name of registrant as specified in charter) Massachusetts 001-33912 04-3308902 (State or other jurisdiction (Comm

December 12, 2024 EX-99.1

December 11, 2024

Exhibit 99.1 December 11, 2024 Dear Valued Shareholder: As you may be aware, Enterprise Bancorp, Inc. (“Enterprise”) has entered into an Agreement and Plan of Merger, dated December 8, 2024, which provides for the merger of Enterprise with and into Independent Bank Corp. (“Independent”), the parent company of Rockland Trust Company, with Independent surviving the merger. In anticipation of the pot

December 12, 2024 8-K

Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers, Financial Statements and Exhibits, Other Events

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of Earliest Event Reported): December 12, 2024 (December 8, 2024) ENTERPRISE BANCORP, INC. (Exact name of registrant as specified in charter) Massachusetts 001-33912 04-3308902 (State or other jurisdiction (Commi

December 12, 2024 EX-10.1

Amendment No. 1 to Employment Agreement, dated December 8, 2024, by and among Enterprise Bancorp, Inc., Enterprise Bank and Trust Company and Steven R. Larochelle.

Exhibit 10.1 EMPLOYMENT AGREEMENT Amendment No. 1 This Amendment No. 1 (this "Amendment") is made and entered into on December 8, 2024 by Enterprise Bancorp, Inc., a Massachusetts corporation (the "Company"), Enterprise Bank and Trust Company, a Massachusetts trust company (the "Bank", and together with the Company, the "Employer") and Steven R. Larochelle (the "Executive" and collectively, with t

December 10, 2024 425

Filed by Independent Bank Corp. pursuant to Rule 425 under the Securities Act of 1933 and deemed filed pursuant to Rule 14a-12 under the Securities Exchange Act of 1934 Subject Company: Enterprise Bancorp, Inc. SEC File No.: 001-33912 Filer’s SEC Fil

Filed by Independent Bank Corp. pursuant to Rule 425 under the Securities Act of 1933 and deemed filed pursuant to Rule 14a-12 under the Securities Exchange Act of 1934 Subject Company: Enterprise Bancorp, Inc. SEC File No.: 001-33912 Filer’s SEC File No.: 1-9047 Date: December 10, 2024 The following are extracts of certain portions of a transcript of remarks delivered by Jeffrey J. Tengel, CEO an

December 9, 2024 425

Filed by Independent Bank Corp. pursuant to Rule 425 under the Securities Act of 1933 and deemed filed pursuant to Rule 14a-12 under the Securities Exchange Act of 1934 Subject Company: Enterprise Bancorp, Inc. SEC File No.: 001-33912 Filer’s SEC Fil

pressrelease Filed by Independent Bank Corp. pursuant to Rule 425 under the Securities Act of 1933 and deemed filed pursuant to Rule 14a-12 under the Securities Exchange Act of 1934 Subject Company: Enterprise Bancorp, Inc. SEC File No.: 001-33912 Filer’s SEC File No.: 1-9047 Date: December 9, 2024 Exhibit 99.1 Joint News Release Independent Bank Corp. and Enterprise Bancorp, Inc. Sign Merger Agre

December 9, 2024 425

Filed by Independent Bank Corp. pursuant to Rule 425 under the Securities Act of 1933 and deemed filed pursuant to Rule 14a-12 under the Securities Exchange Act of 1934 Subject Company: Enterprise Bancorp, Inc. SEC File No.: 001-33912 Filer’s SEC Fil

Filed by Independent Bank Corp. pursuant to Rule 425 under the Securities Act of 1933 and deemed filed pursuant to Rule 14a-12 under the Securities Exchange Act of 1934 Subject Company: Enterprise Bancorp, Inc. SEC File No.: 001-33912 Filer’s SEC File No.: 1-9047 Date: December 9, 2024 Dear Colleagues: I am excited to share that Rockland Trust has announced the acquisition of Enterprise Bank, a $4

December 9, 2024 EX-2.1

Agreement and Plan of Merger, by and among Independent Bank Corp., Rockland Trust Company, Enterprise Bancorp, Inc., and Enterprise Bank and Trust Company, dated as of December 8, 2024 (schedules and exhibits have been omitted pursuant to Item 601(a)(5) of Regulation S-K and will be provided to the Securities and Exchange Commission upon request).

Exhibit 2.1 AGREEMENT AND PLAN OF MERGER DATED AS OF DECEMBER 8, 2024 BY AND AMONG INDEPENDENT BANK CORP., ROCKLAND TRUST COMPANY, ENTERPRISE BANCORP, INC., AND ENTERPRISE BANK AND TRUST COMPANY Table of Contents Page Article I THE MERGER 1 Section 1.01 The Merger 1 Section 1.02 The Bank Merger 2 Section 1.03 Closing 2 Section 1.04 Effective Time 2 Section 1.05 Articles of Organization and Bylaws

December 9, 2024 EX-2.1

Agreement and Plan of Merger, by and among Independent Bank Corp., Rockland Trust Company, Enterprise Bancorp, Inc., and Enterprise Bank and Trust Company, dated as of December 8, 2024 (schedules and exhibits have been omitted pursuant to Item 601(a)(5) of Regulation S-K and will be provided to the Securities and Exchange Commission upon request).

Exhibit 2.1 AGREEMENT AND PLAN OF MERGER DATED AS OF DECEMBER 8, 2024 BY AND AMONG INDEPENDENT BANK CORP., ROCKLAND TRUST COMPANY, ENTERPRISE BANCORP, INC., AND ENTERPRISE BANK AND TRUST COMPANY Table of Contents Page Article I THE MERGER 1 Section 1.01 The Merger 1 Section 1.02 The Bank Merger 2 Section 1.03 Closing 2 Section 1.04 Effective Time 2 Section 1.05 Articles of Organization and Bylaws

December 9, 2024 EX-4.1

Amendment No. 2 to Renewal Rights Agreement, dated as of December 6, 2024, by and between Enterprise Bancorp, Inc. and Computershare Trust Company, N.A., as rights agent.

Exhibit 4.1 AMENDMENT NO. 2 TO RENEWAL RIGHTS AGREEMENT This AMENDMENT NO. 2 TO RENEWAL RIGHTS AGREEMENT (this “Amendment No. 2”) is dated as of December 6, 2024 and amends that certain Renewal Rights Agreement, dated as of December 11, 2007 (the “Rights Agreement”), as previously amended by that certain Amendment No. 1 to Renewal Rights Agreement, dated as of January 5, 2018 (the “Amendment No. 1

December 9, 2024 EX-4.1

Amendment No. 2 to Renewal Rights Agreement, dated as of December 6, 2024, by and between Enterprise Bancorp, Inc. and Computershare Trust Company, N.A., as rights agent.

Exhibit 4.1 AMENDMENT NO. 2 TO RENEWAL RIGHTS AGREEMENT This AMENDMENT NO. 2 TO RENEWAL RIGHTS AGREEMENT (this “Amendment No. 2”) is dated as of December 6, 2024 and amends that certain Renewal Rights Agreement, dated as of December 11, 2007 (the “Rights Agreement”), as previously amended by that certain Amendment No. 1 to Renewal Rights Agreement, dated as of January 5, 2018 (the “Amendment No. 1

December 9, 2024 EX-99.1

FORM OF VOTING AGREEMENT

Exhibit 99.1 FORM OF VOTING AGREEMENT THIS VOTING AGREEMENT (this “Agreement”) is dated as of December 8, 2024, by and between the undersigned holder (“Shareholder”) of common stock, $0.01 par value per share (“Company Common Stock”), of Enterprise Bancorp, Inc., a Massachusetts corporation (“Company”), and Independent Bank Corp., a Massachusetts corporation (“Buyer”). All capitalized terms used b

December 9, 2024 425

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of Earliest Event Reported): December 9, 2024 (December 6, 202

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of Earliest Event Reported): December 9, 2024 (December 6, 2024) ENTERPRISE BANCORP, INC. (Exact name of registrant as specified in charter) Massachusetts 001-33912 04-3308902 (State or other jurisdiction (Commis

December 9, 2024 425

Filed by Independent Bank Corp. pursuant to Rule 425 under the Securities Act of 1933 and deemed filed pursuant to Rule 14a-12 under the Securities Exchange Act of 1934 Subject Company: Enterprise Bancorp, Inc. SEC File No.: 001-33912 Filer’s SEC Fil

Filed by Independent Bank Corp. pursuant to Rule 425 under the Securities Act of 1933 and deemed filed pursuant to Rule 14a-12 under the Securities Exchange Act of 1934 Subject Company: Enterprise Bancorp, Inc. SEC File No.: 001-33912 Filer’s SEC File No.: 1-9047 Date: December 9, 2024 December 9, 2024 Merger Investor Presentation + 2 Disclaimer and Caution About Forward-Looking Statements CAUTION

December 9, 2024 425

Filed by Enterprise Bancorp, Inc.

Filed by Enterprise Bancorp, Inc. pursuant to Rule 425 under the Securities Act of 1933 and deemed filed pursuant to Rule 14a-12 under the Securities Exchange Act of 1934 Subject Company: Enterprise Bancorp, Inc. SEC File No.: 001-33912 Date: December 9, 2024 Dear Colleagues, Customers, and Shareholders, We are excited to share that Enterprise Bank and Rockland Trust have signed a definitive merge

December 9, 2024 425

Filed by Enterprise Bancorp, Inc.

Filed by Enterprise Bancorp, Inc. pursuant to Rule 425 under the Securities Act of 1933 and deemed filed pursuant to Rule 14a-12 under the Securities Exchange Act of 1934 Subject Company: Enterprise Bancorp, Inc. SEC File No.: 001-33912 Date: December 9, 2024 Home Page Graphic Landing page We are delighted to announce that Enterprise Bank and Rockland Trust have signed a definitive merger agreemen

December 9, 2024 8-K

Entry into a Material Definitive Agreement, Termination of a Material Definitive Agreement, Material Modification to Rights of Security Holders, Financial Statements and Exhibits, Other Events

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of Earliest Event Reported): December 9, 2024 (December 6, 2024) ENTERPRISE BANCORP, INC. (Exact name of registrant as specified in charter) Massachusetts 001-33912 04-3308902 (State or other jurisdiction (Commis

December 9, 2024 425

Filed by Independent Bank Corp. pursuant to Rule 425 under the Securities Act of 1933 and deemed filed pursuant to Rule 14a-12 under the Securities Exchange Act of 1934 Subject Company: Enterprise Bancorp, Inc. SEC File No.: 001-33912 Filer’s SEC Fil

425 1 a425-enterpriseagreement.htm 425 - MERGER AGREEMENT AND FORM OF VOTING Filed by Independent Bank Corp. pursuant to Rule 425 under the Securities Act of 1933 and deemed filed pursuant to Rule 14a-12 under the Securities Exchange Act of 1934 Subject Company: Enterprise Bancorp, Inc. SEC File No.: 001-33912 Filer’s SEC File No.: 1-9047 Date: December 9, 2024 UNITED STATES SECURITIES AND EXCHANG

December 9, 2024 EX-99.2

Independent Bank Corp. and Enterprise Bancorp, Inc. Sign Merger Agreement for Rockland Trust to Acquire Enterprise Bank The agreement will unite two relationship-driven organizations and expand Rockland Trust’s footprint into northern Massachusetts a

Exhibit 99.2 Joint News Release Independent Bank Corp. and Enterprise Bancorp, Inc. Sign Merger Agreement for Rockland Trust to Acquire Enterprise Bank The agreement will unite two relationship-driven organizations and expand Rockland Trust’s footprint into northern Massachusetts and southern New Hampshire. Rockland, Massachusetts and Lowell, Massachusetts (December 9, 2024) - Independent Bank Cor

December 9, 2024 425

Filed by Independent Bank Corp. pursuant to Rule 425 under the Securities Act of 1933 and deemed filed pursuant to Rule 14a-12 under the Securities Exchange Act of 1934 Subject Company: Enterprise Bancorp, Inc. SEC File No.: 001-33912 Filer’s SEC Fil

Filed by Independent Bank Corp. pursuant to Rule 425 under the Securities Act of 1933 and deemed filed pursuant to Rule 14a-12 under the Securities Exchange Act of 1934 Subject Company: Enterprise Bancorp, Inc. SEC File No.: 001-33912 Filer’s SEC File No.: 1-9047 Date: December 9, 2024 Independent Bank Corp., the parent company of Rockland Trust Company, has entered into an agreement to acquire En

December 9, 2024 8-A12B/A

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-A/A (Amendment No. 2) FOR REGISTRATION OF CERTAIN CLASSES OF SECURITIES PURSUANT TO SECTION 12(b) OR 12(g) OF THE SECURITIES EXCHANGE ACT OF 1934 ENTERPRISE BANCORP, INC.

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-A/A (Amendment No. 2) FOR REGISTRATION OF CERTAIN CLASSES OF SECURITIES PURSUANT TO SECTION 12(b) OR 12(g) OF THE SECURITIES EXCHANGE ACT OF 1934 ENTERPRISE BANCORP, INC. (exact name of registrant as specified in charter) Massachusetts 001-33912 04-3308902 (State or other jurisdiction of incorporation) (Commission File

December 9, 2024 425

Enterprise Bank All-User from Enterprise Bank CEO

Filed by Enterprise Bancorp, Inc. pursuant to Rule 425 under the Securities Act of 1933 and deemed filed pursuant to Rule 14a-12 under the Securities Exchange Act of 1934 Subject Company: Enterprise Bancorp, Inc. SEC File No.: 001-33912 Date: December 9, 2024 Enterprise Bank All-User from Enterprise Bank CEO Dear Team Members, I have some important news to share. This morning, we issued the attach

December 9, 2024 EX-99.1

FORM OF VOTING AGREEMENT

Exhibit 99.1 FORM OF VOTING AGREEMENT THIS VOTING AGREEMENT (this “Agreement”) is dated as of December 8, 2024, by and between the undersigned holder (“Shareholder”) of common stock, $0.01 par value per share (“Company Common Stock”), of Enterprise Bancorp, Inc., a Massachusetts corporation (“Company”), and Independent Bank Corp., a Massachusetts corporation (“Buyer”). All capitalized terms used b

December 9, 2024 EX-99.2

Independent Bank Corp. and Enterprise Bancorp, Inc. Sign Merger Agreement for Rockland Trust to Acquire Enterprise Bank The agreement will unite two relationship-driven organizations and expand Rockland Trust’s footprint into northern Massachusetts a

Exhibit 99.2 Joint News Release Independent Bank Corp. and Enterprise Bancorp, Inc. Sign Merger Agreement for Rockland Trust to Acquire Enterprise Bank The agreement will unite two relationship-driven organizations and expand Rockland Trust’s footprint into northern Massachusetts and southern New Hampshire. Rockland, Massachusetts and Lowell, Massachusetts (December 9, 2024) - Independent Bank Cor

November 5, 2024 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 10-Q ☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended September 30, 2024 ☐ TRANSITION REPORT PURSUANT

Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 10-Q ☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended September 30, 2024 or ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission File Number: 001-3391

October 22, 2024 EX-99.1

Increase / (Decrease)

Exhibit 99.1 Contact Info: Joseph R. Lussier, Executive Vice President, Chief Financial Officer and Treasurer (978) 656-5578 Enterprise Bancorp, Inc. Announces Third Quarter Financial Results LOWELL, MA, October 22, 2024 (GLOBE NEWSWIRE) - Enterprise Bancorp, Inc. (NASDAQ: EBTC), parent of Enterprise Bank, announced its financial results for the three months ended September 30, 2024. Net income am

October 22, 2024 8-K

Financial Statements and Exhibits, Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of Earliest Event Reported): October 22, 2024 (October 22, 2024) ENTERPRISE BANCORP, INC. (exact name of registrant as specified in charter) Massachusetts 001-33912 04-3308902 (State or Other Jurisdiction (Commis

October 15, 2024 EX-99

Contact Info: Joseph R. Lussier, Executive Vice President, Chief Financial Officer and Treasurer (978) 656-5578

Exhibit 99 Contact Info: Joseph R. Lussier, Executive Vice President, Chief Financial Officer and Treasurer (978) 656-5578 Enterprise Bancorp, Inc. Announces Quarterly Dividend LOWELL, Mass., October 15, 2024 (GLOBE NEWSWIRE) - Enterprise Bancorp, Inc. (the "Company") (NASDAQ:EBTC) On October 15, 2024, the Board of Directors of Enterprise Bancorp, Inc. declared a quarterly dividend of $0.24 per sh

October 15, 2024 8-K

Financial Statements and Exhibits, Other Events

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of Earliest Event Reported): October 15, 2024 (October 15, 2024) ENTERPRISE BANCORP, INC. (exact name of registrant as specified in charter) Massachusetts 001-33912 04-3308902 (State or Other Jurisdiction (Commis

September 18, 2024 8-K

Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers, Financial Statements and Exhibits

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of Earliest Event Reported): September 18, 2024 (September 17, 2024) ENTERPRISE BANCORP, INC. (Exact name of registrant as specified in charter) Massachusetts 001-33912 04-3308902 (State or other jurisdiction (Co

September 18, 2024 EX-10.1

Amendment No. 1 to the Enterprise Bank Supplemental Executive Retirement and Deferred Compensation Plan 2024 Addendum, incorporated by reference to Exhibit 10.1 to the Company’s Current Report on Form 8-K filed on September 18, 2024 (File No. 001-33912).

Exhibit 10.1 Enterprise Bank Supplemental Executive Retirement and Deferred Compensation Plan 2024 Addendum - AMENDED This Amendment No. 1 to the 2024 Addendum to the Enterprise Bank Supplemental Executive Retirement and Deferred Compensation Plan (the "Plan") is effective for the Plan year commencing on January 1, 2024 (the "2024 Plan Year") and is intended to set forth certain provisions of the

September 4, 2024 EX-99.1

Investor Presentation Steven Larochelle, Chief Executive Officer Joe Lussier, Chief Financial Officer September 5, 2024 Disclaimer 2 This investor presentation has been prepared by Enterprise Bancorp, Inc., (the “Company” or “EBTC”) solely for inform

Investor Presentation Steven Larochelle, Chief Executive Officer Joe Lussier, Chief Financial Officer September 5, 2024 Disclaimer 2 This investor presentation has been prepared by Enterprise Bancorp, Inc.

September 4, 2024 8-K

Regulation FD Disclosure, Financial Statements and Exhibits

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of Earliest Event Reported): September 4, 2024 (September 4, 2024) ENTERPRISE BANCORP, INC. (Exact name of registrant as specified in charter) Massachusetts 001-33912 04-3308902 (State or other jurisdiction (Comm

August 6, 2024 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 10-Q ☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended June 30, 2024 ☐ TRANSITION REPORT PURSUANT TO S

Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 10-Q ☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended June 30, 2024 or ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission File Number: 001-33912 Ent

July 23, 2024 8-K

Financial Statements and Exhibits, Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of Earliest Event Reported): July 23, 2024 (July 23, 2024) ENTERPRISE BANCORP, INC. (exact name of registrant as specified in charter) Massachusetts 001-33912 04-3308902 (State or Other Jurisdiction (Commission (

July 23, 2024 EX-99.1

Increase / (Decrease)

Exhibit 99.1 Contact Info: Joseph R. Lussier, Executive Vice President, Chief Financial Officer and Treasurer (978) 656-5578 Enterprise Bancorp, Inc. Announces Second Quarter Financial Results LOWELL, MA, July 23, 2024 (GLOBE NEWSWIRE) - Enterprise Bancorp, Inc. (NASDAQ: EBTC), parent of Enterprise Bank, announced its financial results for the three months ended June 30, 2024. Net income amounted

July 16, 2024 EX-99

Contact Info: Joseph R. Lussier, Executive Vice President, Chief Financial Officer and Treasurer (978) 656-5578

Exhibit 99 Contact Info: Joseph R. Lussier, Executive Vice President, Chief Financial Officer and Treasurer (978) 656-5578 Enterprise Bancorp, Inc. Announces Quarterly Dividend LOWELL, Mass., July 16, 2024 (GLOBE NEWSWIRE) - Enterprise Bancorp, Inc. (the "Company") (NASDAQ:EBTC) On July 16, 2024, the Board of Directors of Enterprise Bancorp, Inc. declared a quarterly dividend of $0.24 per share to

July 16, 2024 8-K

Financial Statements and Exhibits, Other Events

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of Earliest Event Reported): July 16, 2024 (July 16, 2024) ENTERPRISE BANCORP, INC. (exact name of registrant as specified in charter) Massachusetts 001-33912 04-3308902 (State or Other Jurisdiction (Commission (

June 7, 2024 EX-99.1

Enterprise Bank Announces CEO Retirement and Successor Appointment

Exhibit 99.1 For Immediate Release Enterprise Bank Announces CEO Retirement and Successor Appointment •CEO John “Jack” P. Clancy to retire after distinguished 35-year career, with Enterprise, including more than 17 years as CEO •Enterprise Chief Banking Officer, Steven R. Larochelle, named CEO LOWELL, MA – June 7, 2024 (GLOBE NEWSWIRE) - Enterprise Bancorp, Inc. (NASDAQ: EBTC) and Enterprise Bank

June 7, 2024 EX-10.1

Employment Agreement, dated June 5, 2024, by and among the Company, the Bank and Steven R. Larochelle, incorporated by reference to Exhibit 10.1 to the Company’s Current Report on Form 8-K filed on June 7, 2024 (File No. 001-33912).

Exhibit 10.1 EMPLOYMENT AGREEMENT This EMPLOYMENT AGREEMENT (this “Agreement”) made and entered into on June 5, 2024 (the “Effective Date”), by and between Enterprise Bancorp, Inc., a Massachusetts corporation with a principal office at 222 Merrimack Street, Lowell, Massachusetts 01852 (“Company”) and its wholly owned subsidiary, Enterprise Bank and Trust Company, a Massachusetts trust company wit

June 7, 2024 EX-10.2

Exhibit 10.2: Transition Services Agreement, dated June 5, 2024, by and among Enterprise Bancorp, Inc., Enterprise Bank and Trust Company, and John P. Clancy, Jr. (schedules and exhibits have been omitted pursuant to Item 601(a)(5) of Regulation S-K and will be provided to the Securities and Exchange Commission upon request).

Exhibit 10.2 ENTERPRISE BANCORP, INC. TRANSITION SERVICES AGREEMENT This Transition Services Agreement (this "Agreement") is entered into as of the Effective Date (as defined in the signature block of this Agreement) by and between Enterprise Bancorp, Inc., a Massachusetts corporation (the "Company"), Enterprise Bank and Trust Company, a Massachusetts trust company (the "Employer") and John P. Cla

June 7, 2024 8-K

Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers, Financial Statements and Exhibits

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of Earliest Event Reported): June 7, 2024 (June 5, 2024) ENTERPRISE BANCORP, INC. (Exact name of registrant as specified in charter) Massachusetts 001-33912 04-3308902 (State or other jurisdiction (Commission (IR

May 8, 2024 8-K

Submission of Matters to a Vote of Security Holders

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of Earliest Event Reported): May 8, 2024 (May 7, 2024) ENTERPRISE BANCORP, INC. (Exact name of registrant as specified in charter) Massachusetts 001-33912 04-3308902 (State or other jurisdiction (Commission (IRS

May 7, 2024 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 10-Q ☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended March 31, 2024 ☐ TRANSITION REPORT PURSUANT TO

Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 10-Q ☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended March 31, 2024 or ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission File Number: 001-33912 En

April 23, 2024 EX-99.1

ENTERPRISE BANCORP, INC. Consolidated Balance Sheets (Dollars in thousands, except per share data) March 31, 2024 December 31, 2023 March 31, 2023 Assets Cash and cash equivalents: Cash and due from banks $ 41,443 $ 37,443 $ 42,843 Interest-earning d

Exhibit 99.1 Contact Info: Joseph R. Lussier, Executive Vice President, Chief Financial Officer and Treasurer (978) 656-5578 Enterprise Bancorp, Inc. Announces First Quarter Financial Results LOWELL, MA, April 23, 2024 (GLOBE NEWSWIRE) - Enterprise Bancorp, Inc. (NASDAQ: EBTC), parent of Enterprise Bank, announced its financial results for the three months ended March 31, 2024. Net income amounted

April 23, 2024 8-K

Financial Statements and Exhibits, Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of Earliest Event Reported): April 23, 2024 (April 23, 2024) ENTERPRISE BANCORP, INC. (exact name of registrant as specified in charter) Massachusetts 001-33912 04-3308902 (State or Other Jurisdiction (Commission

April 16, 2024 EX-99

Contact Info: Joseph R. Lussier, Executive Vice President, Chief Financial Officer and Treasurer (978) 656-5578

Exhibit 99 Contact Info: Joseph R. Lussier, Executive Vice President, Chief Financial Officer and Treasurer (978) 656-5578 Enterprise Bancorp, Inc. Announces Quarterly Dividend LOWELL, Mass., April 16, 2024 (GLOBE NEWSWIRE) - Enterprise Bancorp, Inc. (the "Company") (NASDAQ:EBTC) On April 16, 2024, the Board of Directors of Enterprise Bancorp, Inc. declared a quarterly dividend of $0.24 per share

April 16, 2024 8-K

Financial Statements and Exhibits, Other Events

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of Earliest Event Reported): April 16, 2024 (April 16, 2024) ENTERPRISE BANCORP, INC. (exact name of registrant as specified in charter) Massachusetts 001-33912 04-3308902 (State or Other Jurisdiction (Commission

April 3, 2024 DEF 14A

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A (Rule 14a-101) INFORMATION REQUIRED IN PROXY STATEMENT SCHEDULE 14A INFORMATION Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Ame

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A (Rule 14a-101) INFORMATION REQUIRED IN PROXY STATEMENT SCHEDULE 14A INFORMATION Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No. ) Filed by the Registrant þ Filed by a Party other than the Registrant ¨ Check the appropriate box: ¨ Preliminary Proxy Statement ¨ Confide

March 25, 2024 8-K

Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of Earliest Event Reported): March 25, 2024 (March 19, 2024) ENTERPRISE BANCORP, INC. (Exact name of registrant as specified in charter) Massachusetts 001-33912 04-3308902 (State or other jurisdiction (Commission

March 22, 2024 EX-10.1

Enterprise Bank 2024 Variable Compensation Incentive Plan, incorporated by reference to Exhibit 10.1 to the Company's Current Report on Form 8-K filed March 22, 2024 (File No. 001-33912)

2024 Variable Compensation Incentive Plan Purpose and Objective The 2024 Variable Compensation Incentive Plan (the Plan) incents and rewards for Bank and Individual performance.

March 22, 2024 8-K

Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers, Financial Statements and Exhibits

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of Earliest Event Reported): March 22, 2024 (March 19, 2024) ENTERPRISE BANCORP, INC. (Exact name of registrant as specified in charter) Massachusetts 001-33912 04-3308902 (State or other jurisdiction (Commission

March 22, 2024 EX-10.2

Enterprise Bank Supplemental Executive Retirement and Deferred Compensation Plan 2024 Addendum, incorporated by reference to Exhibit 10.2 to the Company's Current Report on Form 8-K filed March 22, 2024 (File No. 001-33912)

Enterprise Bank Supplemental Executive Retirement and Deferred Compensation Plan 2024 Addendum This Addendum to the Enterprise Bank Supplemental Executive Retirement and Deferred Compensation Plan (the "Plan") is effective for the Plan year commencing on January 1, 2024 (the "2024 Plan Year") and is intended to set forth certain provisions of the Plan that are determined at the discretion of the Compensation and Human Resources Committee of the Enterprise Bank and Trust Company Board of Directors (the "Compensation and Human Resources Committee").

March 8, 2024 10-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 10-K ☒ ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the fiscal year ended December 31, 2023 ☐ TRANSITION REPORT PURSUANT TO SECTI

Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 10-K ☒ ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the fiscal year ended December 31, 2023 OR ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission file number 001-33912 Enterpri

March 8, 2024 EX-97

Enterprise Ba

-1- DMS 303703050v.1 ENTERPRISE BANCORP, INC. INCENTIVE AWARD RECOUPMENT POLICY This INCENTIVE AWARD RECOUPMENT POLICY (this "Policy") is adopted as of October 2, 2023 (the "Effective Date"), by the [Compensation Committee] (the "Committee") of the Board of Directors (the "Board") of Enterprise Bancorp, Inc., a Massachusetts corporation (our "Company"). WHEREAS, the applicable recoupment provision

March 8, 2024 EX-21

Subsidiaries of the Registrant.

EXHIBIT 21.0 Subsidiaries of Registrant Subsidiary State of Jurisdiction Business Name Enterprise Bank and Trust Company* Massachusetts Enterprise Bank Enterprise Wealth Services LLC** Delaware Enterprise Wealth Services Enterprise Security Corporation** Massachusetts Same Enterprise Security Corporation (II)** Massachusetts Same Enterprise Security Corporation (III)** Massachusetts Same EBTC NMTC

February 29, 2024 SC 13D/A

EBTC / Enterprise Bancorp, Inc. / ANSIN KEN S - SC 13D/A Activist Investment

SC 13D/A 1 ebtc-sc13daansin.htm SC 13D/A UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13D Under the Securities Exchange Act of 1934 (Amendment No. 1)* Enterprise Bancorp Inc. (Name of Issuer) Common Stock, $0.01 par value per share (the “Shares”) (Title of Class of Securities) 293668109 (CUSIP Number) Beth A. Whitaker Hunton Andrews Kurth LLP 1445 Ross Avenue, S

January 25, 2024 8-K

Financial Statements and Exhibits, Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of Earliest Event Reported): January 25, 2024 (January 25, 2024) ENTERPRISE BANCORP, INC. (exact name of registrant as specified in charter) Massachusetts 001-33912 04-3308902 (State or Other Jurisdiction (Commis

January 25, 2024 EX-99.1

ENTERPRISE BANCORP, INC. Consolidated Balance Sheets (Dollars in thousands, except per share data) December 31, 2023 December 31, 2022 Assets Cash and cash equivalents: Cash and due from banks $ 37,443 $ 36,901 Interest-earning deposits with banks 19

Exhibit 99.1 Contact Info: Joseph R. Lussier, Executive Vice President, Chief Financial Officer and Treasurer (978) 656-5578 Enterprise Bancorp, Inc. Announces Fourth Quarter Financial Results LOWELL, MA, January 25, 2024 (GLOBE NEWSWIRE) - Enterprise Bancorp, Inc. (NASDAQ: EBTC), parent of Enterprise Bank, announced its financial results for the three months and year ended December 31, 2023. Net

January 16, 2024 8-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of Earliest Event Reported): January 16, 2024 (January 16, 202

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of Earliest Event Reported): January 16, 2024 (January 16, 2024) ENTERPRISE BANCORP, INC. (exact name of registrant as specified in charter) Massachusetts 001-33912 04-3308902 (State or Other Jurisdiction (Commis

January 16, 2024 EX-99

Contact Info: Joseph R. Lussier, Executive Vice President, Chief Financial Officer and Treasurer (978) 656-5578

Exhibit 99 Contact Info: Joseph R. Lussier, Executive Vice President, Chief Financial Officer and Treasurer (978) 656-5578 Enterprise Bancorp, Inc. Announces Quarterly Dividend LOWELL, Mass., January 16, 2024 (GLOBE NEWSWIRE) - Enterprise Bancorp, Inc. (the "Company") (NASDAQ:EBTC) On January 16, 2024, the Board of Directors of Enterprise Bancorp, Inc. declared a quarterly dividend of $0.24 per sh

December 15, 2023 EX-10.1

Amendment to the Enterprise Bank Supplemental Executive Retirement and Deferred Compensation Plan, incorporated by reference to Exhibit 10.1 to the Company’s Current Report on Form 8-K filed on December 15, 2023 (File no. 001-33912)

AMENDMENT TO THE ENTERPRISE BANK SUPPLEMENTAL EXECUTIVE RETIREMENT AND DEFERRED COMPENSATION PLAN WHEREAS, Enterprise Bank and Trust Company (the "Employer") heretofore adopted the Enterprise Bank Supplemental Executive Retirement and Deferred Compensation Plan (the "Plan"); and WHEREAS, the Employer reserved the right to amend the Plan; and WHEREAS, the Employer desires to amend the Plan to change the vesting schedule with respect to Employer amounts contributed to the Plan for service on or after January 1, 2024.

December 15, 2023 8-K

Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers, Financial Statements and Exhibits

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of Earliest Event Reported): December 15, 2023 (December 12, 2023) ENTERPRISE BANCORP, INC. (Exact name of registrant as specified in charter) Massachusetts 001-33912 04-3308902 (State or other jurisdiction (Comm

December 8, 2023 SC 13D

EBTC / Enterprise Bancorp, Inc. / ANSIN KEN S - SC 13D Activist Investment

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13D Under the Securities Exchange Act of 1934 (Amendment No. )* Enterprise Bancorp Inc. (Name of Issuer) Common Stock, $0.01 par value per share (the “Shares”) (Title of Class of Securities) 293668109 (CUSIP Number) Beth A. Whitaker Hunton Andrews Kurth LLP 1445 Ross Avenue, Suite 3700 Dallas, TX 75202 (214) 979-3000

December 8, 2023 EX-99.1

Exhibit 99.1 Joint Filing Agreement by and between the Reporting Persons, dated

EX-99.1 2 exhibit991jointfilingagree.htm EX-99.1 Exhibit 99.1 JOINT FILING AGREEMENT PURSUANT TO RULE 13D-1(K) The undersigned acknowledge and agree that the foregoing statement on Schedule 13D is filed on behalf of each of the undersigned and that all subsequent amendments to this statement on Schedule 13D may be filed on behalf of each of the undersigned without the necessity of filing additiona

November 15, 2023 EX-99.1

Investor Presentation Jack Clancy, Chief Executive Officer Joe Lussier, Chief Financial Officer November 16, 2023 Disclaimer 2 This investor presentation has been prepared by Enterprise Bancorp, Inc., (the “Company” or “EBTC”) solely for informationa

Investor Presentation Jack Clancy, Chief Executive Officer Joe Lussier, Chief Financial Officer November 16, 2023 Disclaimer 2 This investor presentation has been prepared by Enterprise Bancorp, Inc.

November 15, 2023 8-K

Regulation FD Disclosure, Financial Statements and Exhibits

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of Earliest Event Reported): November 15, 2023 (November 15, 2023) ENTERPRISE BANCORP, INC. (Exact name of registrant as specified in charter) Massachusetts 001-33912 04-3308902 (State or other jurisdiction (Comm

November 7, 2023 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 10-Q ☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended September 30, 2023 ☐ TRANSITION REPORT PURSUANT

Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 10-Q ☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended September 30, 2023 or ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission File Number: 001-3391

October 24, 2023 8-K

Financial Statements and Exhibits, Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of Earliest Event Reported): October 24, 2023 (October 24, 2023) ENTERPRISE BANCORP, INC. (exact name of registrant as specified in charter) Massachusetts 001-33912 04-3308902 (State or Other Jurisdiction (Commis

October 24, 2023 EX-99.1

ENTERPRISE BANCORP, INC. Consolidated Balance Sheets (Dollars in thousands, except per share data) September 30, 2023 December 31, 2022 Assets Cash and cash equivalents: Cash and due from banks $ 45,345 $ 36,901 Interest-earning deposits with banks 1

Exhibit 99.1 Contact Info: Joseph R. Lussier, Executive Vice President, Chief Financial Officer and Treasurer (978) 656-5578 Enterprise Bancorp, Inc. Announces Third Quarter Financial Results LOWELL, MA, October 24, 2023 (GLOBE NEWSWIRE) - Enterprise Bancorp, Inc. (NASDAQ: EBTC), parent of Enterprise Bank, announced its financial results for the three months ended September 30, 2023. Net income am

October 17, 2023 8-K

Financial Statements and Exhibits, Other Events

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of Earliest Event Reported): October 17, 2023 (October 17, 2023) ENTERPRISE BANCORP, INC. (exact name of registrant as specified in charter) Massachusetts 001-33912 04-3308902 (State or Other Jurisdiction (Commis

October 17, 2023 EX-99

Contact Info: Joseph R. Lussier, Executive Vice President, Chief Financial Officer and Treasurer (978) 656-5578

Exhibit 99 Contact Info: Joseph R. Lussier, Executive Vice President, Chief Financial Officer and Treasurer (978) 656-5578 Enterprise Bancorp, Inc. Announces Quarterly Dividend LOWELL, Mass., October 17, 2023 (GLOBE NEWSWIRE) - Enterprise Bancorp, Inc. (the "Company") (NASDAQ:EBTC) On October 17, 2023, the Board of Directors of Enterprise Bancorp, Inc. declared a quarterly dividend of $0.23 per sh

September 1, 2023 FWP

George L. Duncan Jack P. Clancy, Jr. Richard W. Main Chairman Chief Executive Officer President

Filed Pursuant to Rule 433 Dated September 1, 2023 Relating to Prospectus dated August 23, 2023 Registration Statement No.

August 23, 2023 S-3/A

As filed with the Securities and Exchange Commission on August 23, 2023

As filed with the Securities and Exchange Commission on August 23, 2023 Registration No.

August 23, 2023 CORRESP

Enterprise Bancorp, Inc. 222 Merrimack Street Lowell, Massachusetts 01852 August 23, 2023

Enterprise Bancorp, Inc. 222 Merrimack Street Lowell, Massachusetts 01852 August 23, 2023 Via EDGAR U.S. Securities and Exchange Commission Division of Corporation Finance 100 F. Street, N.E. Washington, D.C. 20549 Attention: Aisha Adegbuyi Re: Enterprise Bancorp, Inc. Registration Statement on Form S-3/A (File No. 333-273842) Ladies and Gentlemen: Pursuant to Rule 461 under the Securities Act of

August 23, 2023 S-3/A

As filed with the Securities and Exchange Commission on August 23, 2023.

As filed with the Securities and Exchange Commission on August 23, 2023. Registration No. 333-273860 UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Pre-Effective Amendment No. 1 to Form S-3 REGISTRATION STATEMENT UNDER THE SECURITIES ACT OF 1933 Enterprise Bancorp, Inc. (Exact name of registrant as specified in its charter) Massachusetts (State or other jurisdiction of inc

August 23, 2023 CORRESP

Enterprise Bancorp, Inc. 222 Merrimack Street Lowell, Massachusetts 01852 August 23, 2023

Enterprise Bancorp, Inc. 222 Merrimack Street Lowell, Massachusetts 01852 August 23, 2023 Via EDGAR U.S. Securities and Exchange Commission Division of Corporation Finance 100 F. Street, N.E. Washington, D.C. 20549 Attention: Aisha Adegbuyi Re: Enterprise Bancorp, Inc. Registration Statement on Form S-3/A (File No. 333-273860) Ladies and Gentlemen: Pursuant to Rule 461 under the Securities Act of

August 9, 2023 EX-FILING FEES

Filing Fee Table.

Exhibit 107 Calculation of Filing Fee Tables Form S-3 (Form Type) Enterprise Bancorp, Inc.

August 9, 2023 EX-4.8

Form of Indenture for Subordinated Debt.

Exhibit 4.8 ENTERPRISE BANCORP, INC. Issuer and Trustee SUBORDINATED INDENTURE Dated as of , 20 Subordinated Debt Securities TABLE OF CONTENTS Page: Article One Definitions and Other Provisions of General Application 1 Section 1.01. Definitions 1 Section 1.02. Compliance Certificates and Opinions 6 Section 1.03. Form of Documents Delivered to Trustee 7 Section 1.04. Acts of Holders 7 Section 1.05.

August 9, 2023 S-3

As filed with the Securities and Exchange Commission on August 9, 2023

As filed with the Securities and Exchange Commission on August 9, 2023 Registration No.

August 9, 2023 EX-4.13

Form of Deposit Agreement and Depositary Receipt.

Exhibit 4.13 FORM OF DEPOSIT AGREEMENT This DEPOSIT AGREEMENT (“Deposit Agreement”) is made and entered into as of , 20 , by and among Enterprise Bancorp, Inc., a Massachusetts corporation, , and all holders from time to time of Receipts (as hereinafter defined) issued hereunder. WITNESSETH: WHEREAS, it is desired to provide, as hereinafter set forth in this Deposit Agreement, for the deposit of s

August 9, 2023 EX-4.7

Form of Indenture for Senior Debt.

Exhibit 4.7 ENTERPRISE BANCORP, INC. Issuer and Trustee SENIOR INDENTURE Dated as of , 20 Senior Debt Securities TABLE OF CONTENTS Page: Article One Definitions and Other Provisions of General Application 1 Section 1.01. Definitions 1 Section 1.02. Compliance Certificates and Opinions 6 Section 1.03. Form of Documents Delivered to Trustee 6 Section 1.04. Acts of Holders 7 Section 1.05. Notices, Et

August 9, 2023 EX-4.5

Specimen Common Stock Certificate.

Exhibit 4.5

August 9, 2023 S-3

As filed with the Securities and Exchange Commission on August 9, 2023.

As filed with the Securities and Exchange Commission on August 9, 2023. Registration No. 333- UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM S-3 REGISTRATION STATEMENT UNDER THE SECURITIES ACT OF 1933 Enterprise Bancorp, Inc. (Exact name of registrant as specified in its charter) Massachusetts (State or other jurisdiction of incorporation or organization) 04-3308902 (

August 9, 2023 EX-FILING FEES

Filing Fee Table.

Exhibit 107 Calculation of Filing Fee Tables Form S-3 (Form Type) Enterprise Bancorp, Inc.

August 8, 2023 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 10-Q ☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended June 30, 2023 ☐ TRANSITION REPORT PURSUANT TO S

Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 10-Q ☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended June 30, 2023 or ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission File Number: 001-33912 Ent

July 25, 2023 8-K

Financial Statements and Exhibits, Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of Earliest Event Reported): July 25, 2023 (July 25, 2023) ENTERPRISE BANCORP, INC. (exact name of registrant as specified in charter) Massachusetts 001-33912 04-3308902 (State or Other Jurisdiction (Commission (

July 25, 2023 EX-99.1

ENTERPRISE BANCORP, INC. Consolidated Balance Sheets (Dollars in thousands, except per share data) June 30, 2023 December 31, 2022 Assets Cash and cash equivalents: Cash and due from banks $ 49,996 $ 36,901 Interest-earning deposits with banks 208,82

Exhibit 99.1 Contact Info: Joseph R. Lussier, Executive Vice President, Chief Financial Officer and Treasurer (978) 656-5578 Enterprise Bancorp, Inc. Announces Second Quarter Financial Results LOWELL, MA, July 25, 2023 (GLOBE NEWSWIRE) - Enterprise Bancorp, Inc. (NASDAQ: EBTC), parent of Enterprise Bank, announced its financial results for the three and six months ended June 30, 2023. Executive Ch

July 18, 2023 EX-99

Contact Info: Joseph R. Lussier, Executive Vice President, Chief Financial Officer and Treasurer (978) 656-5578

Exhibit 99 Contact Info: Joseph R. Lussier, Executive Vice President, Chief Financial Officer and Treasurer (978) 656-5578 Enterprise Bancorp, Inc. Announces Quarterly Dividend LOWELL, Mass., July 18, 2023 (GLOBE NEWSWIRE) - Enterprise Bancorp, Inc. (the "Company") (NASDAQ:EBTC) On July 18, 2023, the Board of Directors of Enterprise Bancorp, Inc. declared a quarterly dividend of $0.23 per share to

July 18, 2023 8-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of Earliest Event Reported): July 18, 2023 (July 18, 2023) ENT

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of Earliest Event Reported): July 18, 2023 (July 18, 2023) ENTERPRISE BANCORP, INC. (exact name of registrant as specified in charter) Massachusetts 001-33912 04-3308902 (State or Other Jurisdiction (Commission (

May 9, 2023 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 10-Q ☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended March 31, 2023 ☐ TRANSITION REPORT PURSUANT TO

Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 10-Q ☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended March 31, 2023 or ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission File Number: 001-33912 En

May 3, 2023 8-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of Earliest Event Reported): May 3, 2023 (May 2, 2023) ENTERPR

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of Earliest Event Reported): May 3, 2023 (May 2, 2023) ENTERPRISE BANCORP, INC. (Exact name of registrant as specified in charter) Massachusetts 001-33912 04-3308902 (State or other jurisdiction (Commission (IRS

April 25, 2023 8-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of Earliest Event Reported): April 25, 2023 (April 25, 2023) E

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of Earliest Event Reported): April 25, 2023 (April 25, 2023) ENTERPRISE BANCORP, INC. (exact name of registrant as specified in charter) Massachusetts 001-33912 04-3308902 (State or Other Jurisdiction (Commission

April 25, 2023 EX-99.1

ENTERPRISE BANCORP, INC. Consolidated Balance Sheets (Dollars in thousands, except per share data) March 31, 2023 December 31, 2022 Assets Cash and cash equivalents: Cash and due from banks $ 42,843 $ 36,901 Interest-earning deposits with banks 172,8

Exhibit 99.1 Contact Info: Joseph R. Lussier, Executive Vice President, Chief Financial Officer and Treasurer (978) 656-5578 Enterprise Bancorp, Inc. Announces First Quarter Financial Results LOWELL, MA, April 25, 2023 (GLOBE NEWSWIRE) - Enterprise Bancorp, Inc. (NASDAQ: EBTC), parent of Enterprise Bank, announced net income for the three months ended March 31, 2023, of $10.8 million, or $0.88 per

April 19, 2023 8-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of Earliest Event Reported): April 19, 2023 (April 12, 2023) E

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of Earliest Event Reported): April 19, 2023 (April 12, 2023) ENTERPRISE BANCORP, INC. (Exact name of registrant as specified in charter) Massachusetts 001-33912 04-3308902 (State or other jurisdiction (Commission

April 19, 2023 DEFA14A

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No. )

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No. ) Filed by the Registrant ☑ Filed by a Party other than the Registrant ☐ Check the appropriate box: ☐Preliminary Proxy Statement ☐ Confidential, for Use of the Commission Only (as permitted by Rule 14a-6(e)(2)) ☐ Defini

April 18, 2023 EX-99

Contact Info: Joseph R. Lussier, Executive Vice President, Chief Financial Officer and Treasurer (978) 656-5578

Exhibit 99 Contact Info: Joseph R. Lussier, Executive Vice President, Chief Financial Officer and Treasurer (978) 656-5578 Enterprise Bancorp, Inc. Announces Quarterly Dividend LOWELL, Mass., April 18, 2023 (GLOBE NEWSWIRE) - Enterprise Bancorp, Inc. (the "Company") (NASDAQ:EBTC) On April 18, 2023, the Board of Directors of Enterprise Bancorp, Inc. declared a quarterly dividend of $0.23 per share

April 18, 2023 8-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of Earliest Event Reported): April 18, 2023 (April 18, 2023) E

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of Earliest Event Reported): April 18, 2023 (April 18, 2023) ENTERPRISE BANCORP, INC. (exact name of registrant as specified in charter) Massachusetts 001-33912 04-3308902 (State or Other Jurisdiction (Commission

March 31, 2023 DEF 14A

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A (Rule 14a-101) INFORMATION REQUIRED IN PROXY STATEMENT SCHEDULE 14A INFORMATION Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Ame

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A (Rule 14a-101) INFORMATION REQUIRED IN PROXY STATEMENT SCHEDULE 14A INFORMATION Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No. ) Filed by the Registrant þ Filed by a Party other than the Registrant ¨ Check the appropriate box: ¨ Preliminary Proxy Statement ¨ Confide

March 24, 2023 EX-10.1

Enterprise Bank and Trust Company 2023 Variable Compensation Incentive Plan, incorporated by reference to Exhibit 10.1 to the Company’s Current Report on Form 8-K filed on March 24, 2023 (File No. 001-33912).

2023 Variable Compensation Incentive Plan Purpose and Objective The 2023 Variable Compensation Incentive Plan (the Plan) incents and rewards for Bank and Individual performance.

March 24, 2023 EX-10.2

Fifth Addendum to the Enterprise Bank Supplemental Executive Retirement and Deferred Compensation Plan, incorporated by reference to Exhibit 10.2 to the Company’s Current Report on Form 8-K filed on March 24, 2023 (File no. 001-33912)

Enterprise Bank Supplemental Executive Retirement and Deferred Compensation Plan 2023 Addendum This Addendum to the Enterprise Bank Supplemental Executive Retirement and Deferred Compensation Plan (the "Plan") is effective for the Plan year commencing on January 1, 2023 (the "2023 Plan Year") and is intended to set forth certain provisions of the Plan that are determined at the discretion of the Compensation and Human Resources Committee of the Enterprise Bank and Trust Company Board of Directors (the "Compensation and Human Resources Committee").

March 24, 2023 8-K

Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers, Financial Statements and Exhibits

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of Earliest Event Reported): March 24, 2023 (March 21, 2023) ENTERPRISE BANCORP, INC. (Exact name of registrant as specified in charter) Massachusetts 001-33912 04-3308902 (State or other jurisdiction (Commission

March 8, 2023 EX-21

Subsidiaries of the Registrant.

EXHIBIT 21.0 Subsidiaries of Registrant Subsidiary State of Jurisdiction Business Name Enterprise Bank and Trust Company* Massachusetts Enterprise Bank Enterprise Wealth Services LLC** Delaware Enterprise Wealth Services Enterprise Insurance Services LLC** Delaware Enterprise Insurance Services Enterprise Security Corporation** Massachusetts Same Enterprise Security Corporation (II)** Massachusett

March 8, 2023 10-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 10-K ☒ ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the fiscal year ended December 31, 2022 ☐ TRANSITION REPORT PURSUANT TO SECTI

Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 10-K ☒ ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the fiscal year ended December 31, 2022 OR ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission file number 001-33912 Enterpri

January 26, 2023 8-K

Financial Statements and Exhibits, Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of Earliest Event Reported): January 26, 2023 (January 26, 2023) ENTERPRISE BANCORP, INC. (exact name of registrant as specified in charter) Massachusetts 001-33912 04-3308902 (State or Other Jurisdiction (Commis

January 26, 2023 EX-99

ENTERPRISE BANCORP, INC. Consolidated Balance Sheets (Dollars in thousands, except per share data) December 31, 2022 December 31, 2021 Assets Cash and cash equivalents: Cash and due from banks $ 36,901 $ 33,572 Interest-earning deposits with banks 23

Exhibit 99.1 Contact Info: Joseph R. Lussier, Executive Vice President, Chief Financial Officer and Treasurer (978) 656-5578 Enterprise Bancorp, Inc. Announces Fourth Quarter Financial Results LOWELL, MA, January 26, 2023 (GLOBE NEWSWIRE) - Enterprise Bancorp, Inc. (NASDAQ: EBTC), parent of Enterprise Bank, announced net income for the three months ended December 31, 2022, of $12.3 million, or $1.

January 17, 2023 8-K

Financial Statements and Exhibits, Other Events

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of Earliest Event Reported): January 17, 2023 (January 17, 2023) ENTERPRISE BANCORP, INC. (exact name of registrant as specified in charter) Massachusetts 001-33912 04-3308902 (State or Other Jurisdiction (Commis

January 17, 2023 EX-99

Contact Info: Joseph R. Lussier, Executive Vice President, Chief Financial Officer and Treasurer (978) 656-5578

Exhibit 99 Contact Info: Joseph R. Lussier, Executive Vice President, Chief Financial Officer and Treasurer (978) 656-5578 Enterprise Bancorp, Inc. Announces Quarterly Dividend LOWELL, Mass., January 17, 2023 (GLOBE NEWSWIRE) - Enterprise Bancorp, Inc. (the "Company") (NASDAQ:EBTC) On January 17, 2023, the Board of Directors of Enterprise Bancorp, Inc. declared a quarterly dividend of $0.23 per sh

December 5, 2022 8-K

Regulation FD Disclosure, Financial Statements and Exhibits

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of Earliest Event Reported): December 5, 2022 (December 5, 2022) ENTERPRISE BANCORP, INC. (Exact name of registrant as specified in charter) Massachusetts 001-33912 04-3308902 (State or other jurisdiction (Commis

December 5, 2022 EX-99.1

Investor Presentation Jack Clancy, Chief Executive Officer Joe Lussier, Chief Financial Officer December 5, 2022 Disclaimer 2 This investor presentation has been prepared by Enterprise Bancorp, Inc., (the “Company” or “EBTC”) solely for informational

Investor Presentation Jack Clancy, Chief Executive Officer Joe Lussier, Chief Financial Officer December 5, 2022 Disclaimer 2 This investor presentation has been prepared by Enterprise Bancorp, Inc.

November 4, 2022 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 10-Q ☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended September 30, 2022 ☐ TRANSITION REPORT PURSUANT

Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 10-Q ? QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended September 30, 2022 or ? TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission File Number: 001-3391

October 20, 2022 8-K

Financial Statements and Exhibits, Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of Earliest Event Reported): October 20, 2022 (October 20, 2022) ENTERPRISE BANCORP, INC. (exact name of registrant as specified in charter) Massachusetts 001-33912 04-3308902 (State or Other Jurisdiction (Commis

October 20, 2022 EX-99.1

ENTERPRISE BANCORP, INC. Consolidated Balance Sheets (Dollars in thousands, except per share data) September 30, 2022 December 31, 2021 Assets Cash and cash equivalents: Cash and due from banks $ 45,345 $ 33,572 Interest-earning deposits with banks 3

Exhibit 99.1 Contact Info: Joseph R. Lussier, Executive Vice President, Chief Financial Officer and Treasurer (978) 656-5578 Enterprise Bancorp, Inc. Announces Third Quarter Financial Results LOWELL, MA, October 20, 2022 (GLOBE NEWSWIRE) - Enterprise Bancorp, Inc. (NASDAQ: EBTC), parent of Enterprise Bank, announced net income for the three months ended September 30, 2022, of $12.0 million, or $0.

October 18, 2022 EX-99

Contact Info: Joseph R. Lussier, Executive Vice President, Chief Financial Officer and Treasurer (978) 656-5578

Exhibit 99 Contact Info: Joseph R. Lussier, Executive Vice President, Chief Financial Officer and Treasurer (978) 656-5578 Enterprise Bancorp, Inc. Announces Quarterly Dividend LOWELL, Mass., October 18, 2022 (GLOBE NEWSWIRE) - Enterprise Bancorp, Inc. (the "Company") (NASDAQ:EBTC) On October 18, 2022, the Board of Directors of Enterprise Bancorp, Inc. declared a quarterly dividend of $0.205 per s

October 18, 2022 8-K

Financial Statements and Exhibits, Other Events

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of Earliest Event Reported): October 18, 2022 (October 18, 2022) ENTERPRISE BANCORP, INC. (exact name of registrant as specified in charter) Massachusetts 001-33912 04-3308902 (State or Other Jurisdiction (Commis

October 14, 2022 8-K

Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of Earliest Event Reported): October 14, 2022 (October 11, 2022) ENTERPRISE BANCORP, INC. (Exact name of registrant as specified in charter) Massachusetts 001-33912 04-3308902 (State or other jurisdiction (Commis

August 5, 2022 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 10-Q ☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended June 30, 2022 ☐ TRANSITION REPORT PURSUANT TO S

Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 10-Q ? QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended June 30, 2022 or ? TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission File Number: 001-33912 Ent

July 21, 2022 EX-99.1

ENTERPRISE BANCORP, INC. Consolidated Balance Sheets (Dollars in thousands, except per share data) June 30, 2022 December 31, 2021 June 30, 2021 Assets Cash and cash equivalents: Cash and due from banks $ 56,201 $ 33,572 $ 48,335 Interest-earning dep

Exhibit 99.1 Contact Info: Joseph R. Lussier, Executive Vice President, Chief Financial Officer and Treasurer (978) 656-5578 Enterprise Bancorp, Inc. Announces Second Quarter Financial Results LOWELL, MA, July 21, 2022 (GLOBE NEWSWIRE) - Enterprise Bancorp, Inc. (NASDAQ: EBTC), parent of Enterprise Bank, announced net income for the three months ended June 30, 2022, of $8.2 million, or $0.67 per d

July 21, 2022 8-K

Financial Statements and Exhibits, Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of Earliest Event Reported): July 21, 2022 (July 21, 2022) ENTERPRISE BANCORP, INC. (exact name of registrant as specified in charter) Massachusetts 001-33912 04-3308902 (State or Other Jurisdiction (Commission (

July 19, 2022 8-K

Financial Statements and Exhibits, Other Events

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of Earliest Event Reported): July 19, 2022 (July 19, 2022) ENTERPRISE BANCORP, INC. (exact name of registrant as specified in charter) Massachusetts 001-33912 04-3308902 (State or Other Jurisdiction (Commission (

July 19, 2022 EX-99

Contact Info: Joseph R. Lussier, Executive Vice President, Chief Financial Officer and Treasurer (978) 656-5578

EX-99 2 exhibit99-jul2022dividendpr.htm EX-99 Exhibit 99 Contact Info: Joseph R. Lussier, Executive Vice President, Chief Financial Officer and Treasurer (978) 656-5578 Enterprise Bancorp, Inc. Announces Quarterly Dividend LOWELL, Mass., July 19, 2022 (GLOBE NEWSWIRE) - Enterprise Bancorp, Inc. (the "Company") (NASDAQ:EBTC) On July 19, 2022, the Board of Directors of Enterprise Bancorp, Inc. decla

May 9, 2022 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 10-Q ☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended March 31, 2022 ☐ TRANSITION REPORT PURSUANT TO

Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 10-Q ? QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended March 31, 2022 or ? TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission File Number: 001-33912 En

May 4, 2022 8-K

Submission of Matters to a Vote of Security Holders

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of Earliest Event Reported): May 4, 2022 (May 3, 2022) ENTERPRISE BANCORP, INC. (Exact name of registrant as specified in charter) Massachusetts 001-33912 04-3308902 (State or other jurisdiction (Commission (IRS

April 21, 2022 EX-99.1

ENTERPRISE BANCORP, INC. Consolidated Balance Sheets (Dollars in thousands, except per share data) March 31, 2022 December 31, 2021 March 31, 2021 Assets Cash and cash equivalents: Cash and due from banks $ 45,233 $ 33,572 $ 40,539 Interest-earning d

Exhibit 99.1 Contact Info: Joseph R. Lussier, Executive Vice President, Chief Financial Officer and Treasurer (978) 656-5578 Enterprise Bancorp, Inc. Announces First Quarter Financial Results LOWELL, MA, April 21, 2022 (GLOBE NEWSWIRE) - Enterprise Bancorp, Inc. (NASDAQ: EBTC), parent of Enterprise Bank, announced net income for the three months ended March 31, 2022, of $10.3 million, or $0.85 per

April 21, 2022 8-K

Financial Statements and Exhibits, Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of Earliest Event Reported): April 21, 2022 (April 21, 2022) ENTERPRISE BANCORP, INC. (exact name of registrant as specified in charter) Massachusetts 001-33912 04-3308902 (State or Other Jurisdiction (Commission

April 19, 2022 EX-99

Contact Info: Joseph R. Lussier, Executive Vice President, Chief Financial Officer and Treasurer (978) 656-5578

Exhibit 99 Contact Info: Joseph R. Lussier, Executive Vice President, Chief Financial Officer and Treasurer (978) 656-5578 Enterprise Bancorp, Inc. Announces Quarterly Dividend LOWELL, Mass., April 19, 2022 (GLOBE NEWSWIRE) - Enterprise Bancorp, Inc. (the "Company") (NASDAQ:EBTC) On April 19, 2022, the Board of Directors of Enterprise Bancorp, Inc. declared a quarterly dividend of $0.205 per share

April 19, 2022 8-K

Financial Statements and Exhibits, Other Events

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of Earliest Event Reported): April 19, 2022 (April 19, 2022) ENTERPRISE BANCORP, INC. (exact name of registrant as specified in charter) Massachusetts 001-33912 04-3308902 (State or Other Jurisdiction (Commission

April 1, 2022 DEF 14A

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A (Rule 14a-101) INFORMATION REQUIRED IN PROXY STATEMENT SCHEDULE 14A INFORMATION Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Ame

DEF 14A 1 ebtc04012022def14a.htm DEF 14A UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A (Rule 14a-101) INFORMATION REQUIRED IN PROXY STATEMENT SCHEDULE 14A INFORMATION Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No. ) Filed by the Registrant þ Filed by a Party other than the Registrant ¨ Check the appropriate box

March 18, 2022 EX-10.1

Enterprise Bank and Trust Company 2022 Variable Compensation Incentive Plan, incorporated by reference to Exhibit 10.1 to the Company’s Current Report on Form 8-K filed on March 18, 2022 (File No. 001-33912).

2022 Variable Compensation Incentive Plan Purpose and Objective The 2022 Variable Compensation Incentive Plan (the Plan) incents and rewards for Bank and Individual performance.

March 18, 2022 EX-10.2

Fourth Addendum to the Enterprise Bank Supplemental Executive Retirement and Deferred Compensation Plan, incorporated by reference to Exhibit 10.2 to the Company’s Current Report on Form 8-K filed on March 18, 2022 (File no. 001-33912).

Enterprise Bank Supplemental Executive Retirement and Deferred Compensation Plan 2022 Addendum This Addendum to the Enterprise Bank Supplemental Executive Retirement and Deferred Compensation Plan (the "Plan") is effective for the Plan year commencing on January 1, 2022 (the "2022 Plan Year") and is intended to set forth certain provisions of the Plan that are determined at the discretion of the Compensation and Human Resources Committee of the Enterprise Bank and Trust Company Board of Directors (the "Compensation and Human Resources Committee").

March 18, 2022 8-K

Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers, Financial Statements and Exhibits

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of Earliest Event Reported): March 18, 2022 (March 15, 2022) ENTERPRISE BANCORP, INC. (Exact name of registrant as specified in charter) Massachusetts 001-33912 04-3308902 (State or other jurisdiction (Commission

March 10, 2022 EX-21

Subsidiaries of the Registrant.

EXHIBIT 21.0 Subsidiaries of Registrant Subsidiary State of Jurisdiction Business Name Enterprise Bank and Trust Company* Massachusetts Enterprise Bank Enterprise Wealth Services LLC** Delaware Enterprise Wealth Services Enterprise Insurance Services LLC** Delaware Enterprise Insurance Services 239 Littleton Road LLC** Massachusetts Same Enterprise Security Corporation** Massachusetts Same Enterpr

March 10, 2022 10-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 10-K ☒ ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the fiscal year ended December 31, 2021 ☐ TRANSITION REPORT PURSUANT TO SECTI

Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 10-K ? ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the fiscal year ended December 31, 2021 OR ? TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission file number 001-33912 Enterpri

January 27, 2022 8-K

Financial Statements and Exhibits, Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of Earliest Event Reported): January 27, 2022 (January 27, 2022) ENTERPRISE BANCORP, INC. (exact name of registrant as specified in charter) Massachusetts 001-33912 04-3308902 (State or Other Jurisdiction (Commis

January 27, 2022 EX-99

ENTERPRISE BANCORP, INC. Consolidated Balance Sheets (Dollars in thousands, except per share data) December 31, 2021 December 31, 2020 Assets Cash and cash equivalents: Cash and due from banks $ 33,572 $ 40,636 Interest-earning deposits with banks 40

Exhibit 99 Contact Info: Joseph R. Lussier, Executive Vice President, Chief Financial Officer and Treasurer (978) 656-5578 Enterprise Bancorp, Inc. Announces 2021 Financial Results LOWELL, MA, January 27, 2022 (GLOBE NEWSWIRE) - Enterprise Bancorp, Inc. (NASDAQ: EBTC), parent of Enterprise Bank, announced net income for the three months ended December 31, 2021, of $10.8 million, or $0.90 per dilut

January 18, 2022 EX-99

Contact Info: Joseph R. Lussier, Executive Vice President, Chief Financial Officer and Treasurer (978) 656-5578

Exhibit 99 Contact Info: Joseph R. Lussier, Executive Vice President, Chief Financial Officer and Treasurer (978) 656-5578 Enterprise Bancorp, Inc. Announces Quarterly Dividend LOWELL, Mass., January 18, 2022 (GLOBE NEWSWIRE) - Enterprise Bancorp, Inc. (the "Company") (NASDAQ:EBTC) On January 18, 2022, the Board of Directors of Enterprise Bancorp, Inc. declared a quarterly dividend of $0.205 per s

January 18, 2022 8-K

Financial Statements and Exhibits, Other Events

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of Earliest Event Reported): January 18, 2022 (January 18, 2022) ENTERPRISE BANCORP, INC. (exact name of registrant as specified in charter) Massachusetts 001-33912 04-3308902 (State or Other Jurisdiction (Commis

November 8, 2021 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 10-Q ☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended September 30, 2021 ☐ TRANSITION REPORT PURSUANT

Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 10-Q ? QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended September 30, 2021 or ? TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission File Number: 001-3391

October 28, 2021 8-K/A

Financial Statements and Exhibits, Results of Operations and Financial Condition, Completion of Acquisition or Disposition of Assets

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K/A CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of Earliest Event Reported): October 28, 2021 (October 21, 2021) ENTERPRISE BANCORP, INC. (exact name of registrant as specified in charter) Massachusetts 001-33912 04-3308902 (State or Other Jurisdiction (Comm

October 28, 2021 EX-99

ENTERPRISE BANCORP, INC. Consolidated Balance Sheets (Dollars in thousands, except per share data) September 30, 2021 December 31, 2020 September 30, 2020 Assets Cash and cash equivalents: Cash and due from banks $ 38,056 $ 40,636 $ 43,660 Interest-e

Exhibit 99 Contact Info: Joseph R. Lussier, Executive Vice President, Chief Financial Officer and Treasurer (978) 656-5578 Enterprise Bancorp, Inc. Announces Third Quarter Financial Results LOWELL, MA, October 21, 2021 (GLOBE NEWSWIRE) - Enterprise Bancorp, Inc. (NASDAQ: EBTC), parent of Enterprise Bank, announced net income for the three months ended September 30, 2021 of $9.8 million, or $0.81 p

October 21, 2021 8-K

Financial Statements and Exhibits, Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of Earliest Event Reported): October 21, 2021 (October 21, 2021) ENTERPRISE BANCORP, INC. (exact name of registrant as specified in charter) Massachusetts 001-33912 04-3308902 (State or Other Jurisdiction (Commis

October 21, 2021 EX-99

ENTERPRISE BANCORP, INC. Consolidated Balance Sheets (Dollars in thousands, except per share data) September 30, 2021 December 31, 2020 September 30, 2020 Assets Cash and cash equivalents: Cash and due from banks $ 38,056 $ 40,636 $ 43,660 Interest-e

Exhibit 99 Contact Info: Joseph R. Lussier, Executive Vice President, Chief Financial Officer and Treasurer (978) 656-5578 Enterprise Bancorp, Inc. Announces Third Quarter Financial Results LOWELL, MA, October 21, 2021 (GLOBE NEWSWIRE) - Enterprise Bancorp, Inc. (NASDAQ: EBTC), parent of Enterprise Bank, announced net income for the three months ended September 30, 2021 of $9.8 million, or $0.81 p

October 19, 2021 8-K

Financial Statements and Exhibits, Other Events

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of Earliest Event Reported): October 19, 2021 (October 19, 2021) ENTERPRISE BANCORP, INC. (exact name of registrant as specified in charter) Massachusetts 001-33912 04-3308902 (State or Other Jurisdiction (Commis

October 19, 2021 EX-99

Contact Info: Joseph R. Lussier, Executive Vice President, Chief Financial Officer and Treasurer (978) 656-5578

Exhibit 99 Contact Info: Joseph R. Lussier, Executive Vice President, Chief Financial Officer and Treasurer (978) 656-5578 Enterprise Bancorp, Inc. Announces Quarterly Dividend LOWELL, Mass., October 19, 2021 (GLOBE NEWSWIRE) - Enterprise Bancorp, Inc. (the "Company") (NASDAQ:EBTC) On October 19, 2021, the Board of Directors of Enterprise Bancorp, Inc. declared a quarterly dividend of $0.185 per s

August 6, 2021 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 10-Q ☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended June 30, 2021 ☐ TRANSITION REPORT PURSUANT TO S

Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 10-Q ? QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended June 30, 2021 or ? TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission File Number: 001-33912 Ent

July 22, 2021 8-K

Financial Statements and Exhibits, Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of Earliest Event Reported): July 22, 2021 (July 22, 2021) ENTERPRISE BANCORP, INC. (exact name of registrant as specified in charter) Massachusetts 001-33912 04-3308902 (State or Other Jurisdiction (Commission (

July 22, 2021 EX-99

ENTERPRISE BANCORP, INC. Consolidated Balance Sheets (Dollars in thousands, except per share data) June 30, 2021 December 31, 2020 June 30, 2020 Assets Cash and cash equivalents: Cash and due from banks $ 48,335 $ 40,636 $ 48,483 Interest-earning dep

EX-99 2 ex99-63021financialpressre.htm EX-99 Exhibit 99 Contact Info: Joseph R. Lussier, Executive Vice President, Chief Financial Officer and Treasurer (978) 656-5578 Enterprise Bancorp, Inc. Announces Second Quarter Financial Results LOWELL, MA, July 22, 2021 (GLOBE NEWSWIRE) - Enterprise Bancorp, Inc. (NASDAQ: EBTC), parent of Enterprise Bank, announced net income for the three months ended Jun

July 20, 2021 8-K

Financial Statements and Exhibits, Other Events

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of Earliest Event Reported): July 20, 2021 (July 20, 2021) ENTERPRISE BANCORP, INC. (exact name of registrant as specified in charter) Massachusetts 001-33912 04-3308902 (State or Other Jurisdiction (Commission (

July 20, 2021 EX-99

Contact Info: Joseph R. Lussier, Executive Vice President, Chief Financial Officer and Treasurer (978) 656-5578

Exhibit 99 Contact Info: Joseph R. Lussier, Executive Vice President, Chief Financial Officer and Treasurer (978) 656-5578 Enterprise Bancorp, Inc. Announces Quarterly Dividend LOWELL, Mass., July 20, 2021 (GLOBE NEWSWIRE) - Enterprise Bancorp, Inc. (the "Company") (NASDAQ:EBTC) On July 20, 2021, the Board of Directors of Enterprise Bancorp, Inc. declared a quarterly dividend of $0.185 per share t

May 11, 2021 S-8

- S-8

Registration Statement No. 333- UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM S-8 REGISTRATION STATEMENT UNDER THE SECURITIES ACT OF 1933 ENTERPRISE BANCORP, INC. (Exact name of registrant as specified in its charter) Massachusetts 04-3308902 (State or other jurisdiction of (I.R.S. Employer incorporation or organization) Identification No.) 222 Merrimack Street Lowel

May 10, 2021 10-Q

Quarterly Report - 10-Q

Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 10-Q ? QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended March 31, 2021 or ? TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission File Number: 001-33912 En

May 6, 2021 8-K

Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers, Financial Statements and Exhibits, Submission of Matters to a Vote of Security Holders

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of Earliest Event Reported): May 6, 2021 (May 4, 2021) ENTERPRISE BANCORP, INC. (Exact name of registrant as specified in charter) Massachusetts 001-33912 04-3308902 (State or other jurisdiction (Commission (IRS

May 6, 2021 EX-10.1

Amendment No. 1 to the Enterprise Bancorp, Inc. 2016 Stock Incentive Plan, dated January 19, 2021, incorporated by reference to the Exhibit 10.1 to the Company's Current Report on Form 8-K filed on May 6, 2021 (File No. 001-33912).

EX-10.1 2 exhibit101amendmentno1toen.htm EX-10.1 Exhibit 10.1 AMENDMENT NO. 1 ENTERPRISE BANCORP, INC. 2016 STOCK INCENTIVE PLAN Amendment No. 1 THIS AMENDMENT NO. 1 (this “Amendment”) to the Enterprise Bancorp, Inc. 2016 Stock Incentive Plan, as amended (the “Plan”), is made by Enterprise Bancorp, Inc., a Massachusetts corporation (the “Company”), effective as of the Effective Date (as defined be

April 23, 2021 EX-10.1

Enterprise Bank 2021 Variable Compensation Incentive Plan.

2021 Variable Compensation Incentive Plan Purpose and Objective The 2021 Variable Compensation Incentive Plan (the Plan) incents and rewards for Bank and Individual performance.

April 23, 2021 8-K

Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers, Financial Statements and Exhibits

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of Earliest Event Reported): April 23, 2021 (April 20, 2021) ENTERPRISE BANCORP, INC. (Exact name of registrant as specified in charter) Massachusetts 001-33912 04-3308902 (State or other jurisdiction (Commission

April 23, 2021 EX-10.2

Enterprise Bank Supplemental Executive Retirement and Deferred Compensation Plan 2021 Addendum.

Enterprise Bank Supplemental Executive Retirement and Deferred Compensation Plan 2021 Addendum This Addendum to the Enterprise Bank Supplemental Executive Retirement and Deferred Compensation Plan (the "Plan") is effective for the Plan year commencing on January 1, 2021 (the "2021 Plan Year") and is intended to set forth certain provisions of the Plan that are determined at the discretion of the Compensation and Human Resources Committee of the Enterprise Bank and Trust Company Board of Directors (the "Compensation and Human Resources Committee").

April 22, 2021 8-K

Financial Statements and Exhibits, Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of Earliest Event Reported): April 22, 2021 (April 22, 2021) ENTERPRISE BANCORP, INC. (exact name of registrant as specified in charter) Massachusetts 001-33912 04-3308902 (State or Other Jurisdiction (Commission

April 22, 2021 EX-99

ENTERPRISE BANCORP, INC. Consolidated Balance Sheets (Dollars in thousands, except per share data) March 31, 2021 December 31, 2020 March 31, 2020 Assets Cash and cash equivalents: Cash and due from banks $ 40,539 $ 40,636 $ 32,833 Interest-earning d

Exhibit 99 Contact Info: Joseph R. Lussier, Executive Vice President, Chief Financial Officer and Treasurer (978) 656-5578 Enterprise Bancorp, Inc. Announces First Quarter Financial Results LOWELL, MA, April 22, 2021 (GLOBE NEWSWIRE) - Enterprise Bancorp, Inc. (NASDAQ: EBTC), parent of Enterprise Bank, announced net income for the three months ended March 31, 2021 of $10.4 million, or $0.86 per di

April 20, 2021 8-K

Financial Statements and Exhibits, Other Events

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of Earliest Event Reported): April 20, 2021 (April 20, 2021) ENTERPRISE BANCORP, INC. (exact name of registrant as specified in charter) Massachusetts 001-33912 04-3308902 (State or Other Jurisdiction (Commission

April 20, 2021 EX-99

Contact Info: Joseph R. Lussier, Executive Vice President, Chief Financial Officer and Treasurer (978) 656-5578

Exhibit 99 Contact Info: Joseph R. Lussier, Executive Vice President, Chief Financial Officer and Treasurer (978) 656-5578 Enterprise Bancorp, Inc. Announces Quarterly Dividend LOWELL, Mass., April 20, 2021 (GLOBE NEWSWIRE) - Enterprise Bancorp, Inc. (the "Company") (NASDAQ:EBTC) On April 20, 2021, the Board of Directors of Enterprise Bancorp, Inc. declared a quarterly dividend of $0.185 per share

April 2, 2021 8-K

Other Events

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of Earliest Event Reported): April 2, 2021 (March 31, 2021) ENTERPRISE BANCORP, INC. (Exact name of registrant as specified in charter) Massachusetts 001-33912 04-3308902 (State or other jurisdiction of incorpora

April 1, 2021 DEF 14A

Amendment No.1 to the Enterprise Bancorp, Inc. 2016 Stock Incentive Plan (incorporated herein by reference to the Company’s Definitive Proxy Statement on Schedule 14A as filed with the Commission on April 1, 2021 (File No. 001-33912))

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A (Rule 14a-101) INFORMATION REQUIRED IN PROXY STATEMENT SCHEDULE 14A INFORMATION Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No. ) Filed by the Registrant ? Filed by a Party other than the Registrant ? Check the appropriate box: ? Preliminary Proxy Statement ? Confide

March 22, 2021 8-K

Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of Earliest Event Reported): March 22, 2021 (March 16, 2021) ENTERPRISE BANCORP, INC. (Exact name of registrant as specified in charter) Massachusetts 001-33912 04-3308902 (State or other jurisdiction (Commission

March 10, 2021 EX-4.3

Exhibit 4.3

Exhibit 4.3 DESCRIPTION OF THE COMPANY?S COMMON STOCK REGISTERED UNDER SECTION 12 OF THE EXCHANGE ACT OF 1934 The following summary describes the material features and rights of the shares of common stock (the ?common stock?) of Enterprise Bancorp, Inc. (referred to herein as ?the Company,? ?our,? ?us,? or ?we?). This summary does not purport to be a complete description of the terms and condition

March 10, 2021 10-K

Annual Report - 10-K

Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 10-K ? ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the fiscal year ended December 31, 2020 OR ? TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission file number 001-33912 Enterpri

March 10, 2021 EX-21

Subsidiaries of the Registrant.

EXHIBIT 21.0 Subsidiaries of Registrant Subsidiary State of Jurisdiction Business Name Enterprise Bank and Trust Company* Massachusetts Enterprise Bank Enterprise Wealth Services LLC** Delaware Enterprise Wealth Services Enterprise Insurance Services LLC** Delaware Enterprise Insurance Services Enterprise Security Corporation** Massachusetts Same Enterprise Security Corporation (II)** Massachusett

January 28, 2021 EX-99

ENTERPRISE BANCORP, INC. Consolidated Balance Sheets (Dollars in thousands, except per share data) December 31, 2020 December 31, 2019 Assets Cash and cash equivalents: Cash and due from banks $ 40,636 $ 39,927 Interest-earning deposits 213,146 23,86

Exhibit 99 Contact Info: Joseph R. Lussier, Executive Vice President, Chief Financial Officer and Treasurer (978) 656-5578 Enterprise Bancorp, Inc. Announces 2020 Financial Results LOWELL, MA, January 28, 2021 (GLOBE NEWSWIRE) - Enterprise Bancorp, Inc. (NASDAQ: EBTC), parent of Enterprise Bank, announced net income for the year ended December 31, 2020 of $31.5 million, or $2.64 per diluted share,

January 28, 2021 8-K

Financial Statements and Exhibits, Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of Earliest Event Reported): January 28, 2021 (January 28, 2021) ENTERPRISE BANCORP, INC. (exact name of registrant as specified in charter) Massachusetts 001-33912 04-3308902 (State or Other Jurisdiction (Commis

January 22, 2021 8-K

Amendments to Articles of Incorporation or Bylaws; Change in Fiscal Year, Financial Statements and Exhibits

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of Earliest Event Reported): January 22, 2021 (January 19, 2021) ENTERPRISE BANCORP, INC. (Exact name of registrant as specified in charter) Massachusetts 001-33912 04-3308902 (State or other jurisdiction (Commis

January 22, 2021 EX-3.1

Second Amended and Restated Bylaws of the Company, as amended as of January 19, 2021, incorporated by reference to Exhibit 3.1 to the Company's Current Report on Form 8-K filed on January 22, 2021 (File No. 001-33912).

Exhibit 3.1 AS APPROVED BY THE BOARD OF DIRECTORS ON JANUARY 19, 2021 SECOND AMENDED AND RESTATED BY-LAWS of ENTERPRISE BANCORP, INC. ARTICLE I OFFICES The main office of Enterprise Bancorp, Inc. (the “Corporation”) shall be located in Lowell, Massachusetts and may be changed from time to time by the Board of Directors of the Corporation. The Corporation may also establish other offices at such pl

January 19, 2021 8-K

Financial Statements and Exhibits, Other Events

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of Earliest Event Reported): January 19, 2021 (January 19, 2021) ENTERPRISE BANCORP, INC. (exact name of registrant as specified in charter) Massachusetts 001-33912 04-3308902 (State or Other Jurisdiction (Commis

January 19, 2021 EX-99

Contact Info: Joseph R. Lussier, Executive Vice President, Chief Financial Officer and Treasurer (978) 656-5578

Exhibit 99 Contact Info: Joseph R. Lussier, Executive Vice President, Chief Financial Officer and Treasurer (978) 656-5578 Enterprise Bancorp, Inc. Announces Quarterly Dividend LOWELL, Mass., January 19, 2021 (GLOBE NEWSWIRE) - Enterprise Bancorp, Inc. (the "Company") (NASDAQ:EBTC) On January 19, 2021, the Board of Directors of Enterprise Bancorp, Inc. declared a quarterly dividend of $0.185 per s

November 16, 2020 8-K

Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers - 8-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of Earliest Event Reported): November 16, 2020 (November 10, 2020) ENTERPRISE BANCORP, INC. (Exact name of registrant as specified in charter) Massachusetts 001-33912 04-3308902 (State or other jurisdiction (Comm

November 6, 2020 10-Q

Quarterly Report - 10-Q

Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 10-Q ☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended September 30, 2020 or ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission File Number: 001-3391

October 22, 2020 8-K

Financial Statements and Exhibits, Results of Operations and Financial Condition - 8-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of Earliest Event Reported): October 22, 2020 (October 22, 2020) ENTERPRISE BANCORP, INC. (exact name of registrant as specified in charter) Massachusetts 001-33912 04-3308902 (State or Other Jurisdiction (Commis

October 22, 2020 EX-99

ENTERPRISE BANCORP, INC. Consolidated Balance Sheets (Dollars in thousands, except per share data) September 30, 2020 December 31, 2019 September 30, 2019 Assets Cash and cash equivalents: Cash and due from banks $ 43,660 $ 39,927 $ 52,927 Interest-e

Exhibit 99 Contact Info: Joseph R. Lussier, Executive Vice President, Chief Financial Officer and Treasurer (978) 656-5578 Enterprise Bancorp, Inc. Announces Third Quarter 2020 Financial Results LOWELL, MA, October 22, 2020 (GLOBE NEWSWIRE) - Enterprise Bancorp, Inc. (NASDAQ: EBTC), parent of Enterprise Bank, announced net income for the three months ended September 30, 2020 of $10.3 million, or $

October 20, 2020 EX-99

Contact Info: Joseph R. Lussier, Executive Vice President, Chief Financial Officer and Treasurer (978) 656-5578

Exhibit 99 Contact Info: Joseph R. Lussier, Executive Vice President, Chief Financial Officer and Treasurer (978) 656-5578 Enterprise Bancorp, Inc. Announces Quarterly Dividend LOWELL, Mass., October 20, 2020 (GLOBE NEWSWIRE) - Enterprise Bancorp, Inc. (the "Company") (NASDAQ:EBTC) On October 20, 2020, the Board of Directors of Enterprise Bancorp, Inc. declared a quarterly dividend of $0.175 per s

October 20, 2020 8-K

Financial Statements and Exhibits, Other Events - 8-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of Earliest Event Reported): October 20, 2020 (October 20, 2020) ENTERPRISE BANCORP, INC. (exact name of registrant as specified in charter) Massachusetts 001-33912 04-3308902 (State or Other Jurisdiction (Commis

September 16, 2020 EX-99.1

CHAIRMAN OF THE BOARD GEORGE L. DUNCAN ANNOUNCES THE APPOINTMENT OF TWO NEW DIRECTORS

PRESS RELEASE- IMMEDIATE RELEASE CONTACT: Matthew Coggins Senior Vice President/Chief Marketing and Communications Officer Enterprise Bank 978-656-5708 Matthew.

September 16, 2020 8-K

Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers, Financial Statements and Exhibits - 8-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of Earliest Event Reported): September 16, 2020 (September 15, 2020) ENTERPRISE BANCORP, INC. (Exact name of registrant as specified in charter) Massachusetts 001-33912 04-3308902 (State or other jurisdiction (Co

September 1, 2020 FWP

George L. Duncan Jack P. Clancy, Jr. Richard W. Main Chairman Chief Executive Officer President

Filed Pursuant to Rule 433 Dated September 1, 2020 Relating to Prospectus dated August 25, 2020 Registration Statement No.

August 28, 2020 424B3

OFFER TO EXCHANGE $60,000,000 aggregate principal amount of 5.25% Fixed-to-Floating Rate Subordinated Notes due 2030 that have been registered under the Securities Act of 1933 for any and all outstanding unregistered 5.25% Fixed-to-Floating Rate Subo

Filed Pursuant to Rule 424(b)(3) Registration Statement No. 333-245669 PROSPECTUS OFFER TO EXCHANGE $60,000,000 aggregate principal amount of 5.25% Fixed-to-Floating Rate Subordinated Notes due 2030 that have been registered under the Securities Act of 1933 for any and all outstanding unregistered 5.25% Fixed-to-Floating Rate Subordinated Notes due 2030 The exchange offer will expire at 5:00 p.m.,

August 25, 2020 EX-99.1

Form of Global Note Letter of Transmittal relating to the 5.25% Fixed-to-Floating Rate Subordinated Notes due 2030

Exhibit 99.1 THIS DOCUMENT IS IMPORTANT AND REQUIRES YOUR IMMEDIATE ATTENTION. If you are in any doubt as to the action to be taken, you should immediately consult your broker, bank manager, lawyer, accountant, investment advisor or other professional advisor. ENTERPRISE BANCORP, INC. Letter of Transmittal For Tender of All Unregistered Outstanding 5.25% Fixed-to-Floating Rate Subordinated Notes d

August 25, 2020 EX-99.2

Form of Physical Note Letter of Transmittal relating to the 5.25% Fixed-to-Floating Rate Subordinated Notes due 2030

Exhibit 99.2 THIS DOCUMENT IS IMPORTANT AND REQUIRES YOUR IMMEDIATE ATTENTION. If you are in any doubt as to the action to be taken, you should immediately consult your broker, bank manager, lawyer, accountant, investment advisor or other professional advisor. ENTERPRISE BANCORP, INC. Letter of Transmittal For Tender of All Unregistered Outstanding 5.25% Fixed-to-Floating Rate Subordinated Notes d

August 25, 2020 CORRESP

-

Enterprise Bancorp, Inc. 222 Merrimack Street Lowell, Massachusetts 01852 August 25, 2020 Via EDGAR U.S. Securities and Exchange Commission Division of Corporation Finance 100 F. Street, N.E. Washington, D.C. 20549 Attention: Tonya K. Aldave Re: Enterprise Bancorp, Inc. Registration Statement on Form S-3/A (File No. 333-245579) Ladies and Gentlemen: Pursuant to Rule 461 under the Securities Act of

August 25, 2020 S-3/A

- S-3/A 2020 DRP & DSPP

As filed with the Securities and Exchange Commission on August 25, 2020 Registration No.

August 25, 2020 CORRESP

-

Enterprise Bancorp, Inc. 222 Merrimack Street Lowell, Massachusetts 01852 August 25, 2020 Via EDGAR U.S. Securities and Exchange Commission Division of Corporation Finance 100 F. Street, N.E. Washington, D.C. 20549 Attention: Tonya K. Aldave Re: Enterprise Bancorp, Inc. Registration Statement on Form S-3 (File No. 333-245656) Ladies and Gentlemen: Pursuant to Rule 461 under the Securities Act of 1

August 25, 2020 S-4/A

- S-4/A

As filed with the Securities and Exchange Commission on August 25, 2020. Registration No. 333-245669 UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Amendment No. 1 to FORM S-4 REGISTRATION STATEMENT UNDER THE SECURITIES ACT OF 1933 Enterprise Bancorp, Inc. (Exact name of registrant as specified in its charter) Massachusetts (State or other jurisdiction of incorporation or

August 25, 2020 CORRESP

-

Enterprise Bancorp, Inc. 222 Merrimack Street Lowell, Massachusetts 01852 August 25, 2020 Via EDGAR U.S. Securities and Exchange Commission Division of Corporation Finance 100 F. Street, N.E. Washington, D.C. 20549 Attention: Tonya K. Aldave Re: Enterprise Bancorp, Inc. Registration Statement on Form S-4 (File No. 333-245669) Ladies and Gentlemen: Pursuant to Rule 461 under the Securities Act of 1

August 14, 2020 CORRESP

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Enterprise Bancorp, Inc. 222 Merrimack Street Lowell, Massachusetts 01852 August 14, 2020 BY EDGAR U.S. Securities and Exchange Commission 100 F. Street, N.E. Washington, D.C. 20549 Re: Enterprise Bancorp, Inc. Exchange Offer. Ladies and Gentlemen: In connection with the exchange offer (the “Exchange Offer”) being made by Enterprise Bancorp, Inc. (the “Issuer”) pursuant to the prospectus contained

August 13, 2020 EX-99.1

Form of Global Note Letter of Transmittal relating to the 5.25% Fixed-to-Floating Rate Subordinated Notes due 2030

Exhibit 99.1 THIS DOCUMENT IS IMPORTANT AND REQUIRES YOUR IMMEDIATE ATTENTION. If you are in any doubt as to the action to be taken, you should immediately consult your broker, bank manager, lawyer, accountant, investment advisor or other professional advisor. ENTERPRISE BANCORP, INC. Letter of Transmittal For Tender of All Unregistered Outstanding 5.25% Fixed-to-Floating Rate Subordinated Notes d

August 13, 2020 EX-4.7

Form of Indenture for Senior Debt.

Exhibit 4.7 ENTERPRISE BANCORP, INC. Issuer and Trustee SENIOR INDENTURE Dated as of , 20 Senior Debt Securities TABLE OF CONTENTS Page: Article One Definitions and Other Provisions of General Application 1 Section 1.01. Definitions 1 Section 1.02. Compliance Certificates and Opinions 6 Section 1.03. Form of Documents Delivered to Trustee 6 Section 1.04. Acts of Holders. 7 Section 1.05. Notices, E

August 13, 2020 EX-4.13

Form of Deposit Agreement and Depositary Receipt

Exhibit 4.13 FORM OF DEPOSIT AGREEMENT This DEPOSIT AGREEMENT (“Deposit Agreement”) is made and entered into as of , 20 , by and among Enterprise Bancorp, Inc., a Massachusetts corporation, , and all holders from time to time of Receipts (as hereinafter defined) issued hereunder. WITNESSETH: WHEREAS, it is desired to provide, as hereinafter set forth in this Deposit Agreement, for the deposit of s

August 13, 2020 EX-99.2

Form of Physical Note Letter of Transmittal relating to the 5.25% Fixed-to-Floating Rate Subordinated Notes due 2030

Exhibit 99.2 THIS DOCUMENT IS IMPORTANT AND REQUIRES YOUR IMMEDIATE ATTENTION. If you are in any doubt as to the action to be taken, you should immediately consult your broker, bank manager, lawyer, accountant, investment advisor or other professional advisor. ENTERPRISE BANCORP, INC. Letter of Transmittal For Tender of All Unregistered Outstanding 5.25% Fixed-to-Floating Rate Subordinated Notes d

August 13, 2020 EX-4.5

Specimen Common Stock Certificate, incorporated by reference to Exhibit 4.5 to the Registration Statement on Form S-3 of Enterprise Bancorp, Inc. filed on August 13, 2020 (Registration No. 333-245579.

Exhibit 4.5

August 13, 2020 EX-25.1

Form T-1 Statement of Eligibility under the Trust Indenture Act of 1939, as amended, of UMB Bank, N.A., with respect to the Indenture, dated as of July 7, 2020, between Enterprise Bancorp, Inc. and UMB Bank, N.A., as trustee, regarding 5.25% Fixed-to-Floating Rate Subordinated Notes due 2030

Exhibit 25.1 SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM T-1 STATEMENT OF ELIGIBILITY UNDER THE TRUST INDENTURE ACT OF 1939 OF A CORPORATION DESIGNATED TO ACT AS TRUSTEE Check if an Application to Determine Eligibility of a Trustee Pursuant to Section 305(b)(2) UMB BANK, NATIONAL ASSOCIATION (Exact name of Trustee as specified in its charter) 44-0201230 I.R.S. Employer Identific

August 13, 2020 S-3

- S-3

As filed with the Securities and Exchange Commission on August 13, 2020. Registration No. 333- UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM S-3 REGISTRATION STATEMENT UNDER THE SECURITIES ACT OF 1933 Enterprise Bancorp, Inc. (Exact name of registrant as specified in its charter) Massachusetts (State or other jurisdiction of incorporation or organization) 04-3308902

August 13, 2020 S-4

- S-4 EBTC FORM S-4 AUGUST 2020

As filed with the Securities and Exchange Commission on August 13, 2020. Registration No. 333- UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM S-4 REGISTRATION STATEMENT UNDER THE SECURITIES ACT OF 1933 Enterprise Bancorp, Inc. (Exact name of registrant as specified in its charter) Massachusetts (State or other jurisdiction of incorporation or organization) 04-3308902

August 13, 2020 S-3

Enterprise Bancorp, Inc. Dividend Reinvestment and Direct Stock Purchase Plan, incorporated by reference to the section of the Company's Registration Statement on Form S-3 (Reg. No. 333-219879), filed on August 13, 2020, appearing under the heading "The Plan."

As filed with the Securities and Exchange Commission on August 13, 2020 Registration No.

August 13, 2020 EX-4.8

Form of Indenture for Subordinated Debt

Exhibit 4.8 ENTERPRISE BANCORP, INC. Issuer and Trustee SUBORDINATED INDENTURE Dated as of , 20 Subordinated Debt Securities TABLE OF CONTENTS Page: Article One Definitions and Other Provisions of General Application 1 Section 1.01. Definitions 1 Section 1.02. Compliance Certificates and Opinions 6 Section 1.03. Form of Documents Delivered to Trustee 6 Section 1.04. Acts of Holders 7 Section 1.05.

August 7, 2020 10-Q

Quarterly Report - 10-Q

Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 10-Q ☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended June 30, 2020 or ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission File Number: 001-33912 Ent

July 27, 2020 EX-99

5 ENTERPRISE BANCORP, INC. Consolidated Balance Sheets (unaudited) (Dollars in thousands, except per share data) June 30, 2020 December 31, 2019 June 30, 2019 Assets Cash and cash equivalents: Cash and due from banks $ 48,483 $ 39,927 $ 46,918 Intere

Exhibit 99 Contact Info: Joseph R. Lussier, Executive Vice President, Chief Financial Officer and Treasurer (978) 656-5578 Enterprise Bancorp, Inc. Announces Second Quarter 2020 Net Income of $7.3 Million LOWELL, MA, July 27, 2020 (GLOBE NEWSWIRE) - Enterprise Bancorp, Inc. (NASDAQ: EBTC), parent of Enterprise Bank, announced net income for the three months ended June 30, 2020 of $7.3 million, or

July 27, 2020 8-K

Financial Statements and Exhibits, Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of Earliest Event Reported): July 27, 2020 (July 27, 2020) ENTERPRISE BANCORP, INC. (exact name of registrant as specified in charter) Massachusetts 001-33912 04-3308902 (State or Other Jurisdiction (Commission (

July 21, 2020 8-K

Financial Statements and Exhibits, Other Events

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of Earliest Event Reported): July 21, 2020 (July 21, 2020) ENTERPRISE BANCORP, INC. (exact name of registrant as specified in charter) Massachusetts 001-33912 04-3308902 (State or Other Jurisdiction (Commission (

July 21, 2020 EX-99

Contact Info: Joseph R. Lussier, Executive Vice President, Chief Financial Officer and Treasurer (978) 656-5578

Exhibit 99 Contact Info: Joseph R. Lussier, Executive Vice President, Chief Financial Officer and Treasurer (978) 656-5578 Enterprise Bancorp, Inc. Announces Quarterly Dividend LOWELL, Mass., July 21, 2020 (GLOBE NEWSWIRE) - Enterprise Bancorp, Inc. (the "Company") (NASDAQ:EBTC) On July 21, 2020, the Board of Directors of Enterprise Bancorp, Inc. declared a quarterly dividend of $0.175 per share t

July 7, 2020 EX-99.2

Investor Presentation of Enterprise Bancorp, Inc.

| 1 Subordinated Notes Offering June 29, 2020 NASDAQ: EBTC www.enterprisebanking.com| 2 Disclaimer This investor presentation contains, and future oral and written statements of Enterprise Bancorp, Inc. (the “Company” or “EBTC”) and its wholly-owned banking subsidiary, Enterprise Bank & Trust Company (the “Bank”), and its management may contain, statements about future events that constitute forwa

July 7, 2020 EX-10.1

Form of Subordinated Note Purchase Agreement dated July 7, 2020, incorporated by reference to Exhibit 10.1 to the Company's Current Report on Form 8-K filed on July 7, 2020 (File No. 001-33912).

Exhibit 10.1 FORM OF SUBORDINATED NOTE PURCHASE AGREEMENT This SUBORDINATED NOTE PURCHASE AGREEMENT (this “Agreement”) is dated as of July 7, 2020, and is made by and among Enterprise Bancorp, Inc., a Massachusetts corporation (the “Company”), and the several purchasers of the Subordinated Notes (as defined herein) identified on the signature pages hereto (each a “Purchaser” and collectively, the

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