CATC / Cambridge Bancorp - Pengajuan SECLaporan Tahunan, Pernyataan Proksi

Cambridge Bancorp
US ˙ NasdaqCM ˙ US1321521098
HINDI NA ACTIVE ANG SIMBONG ITO

Mga Batayang Estadistika
LEI 549300Q8HL7EWEE0HW14
CIK 711772
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 Cambridge Bancorp
SEC Filings (Chronological Order)
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July 26, 2024 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: 1-38184 Cambridge Bancorp (Exact name of registrant as specified in its char

July 15, 2024 EX-2.2

AMENDMENT NO. 1 TO AGREEMENT AND PLAN OF MERGER

Exhibit 2.2 Execution Version AMENDMENT NO. 1 TO AGREEMENT AND PLAN OF MERGER This AMENDMENT NO. 1 TO AGREEMENT AND PLAN OF MERGER (the “Amendment”), dated effective as of July 2, 2024, is by and among Eastern Bankshares, Inc. (“Buyer”), Citadel MS 2023, Inc., a wholly-owned subsidiary of Buyer (“Merger Sub”), Eastern Bank, a wholly-owned subsidiary of Buyer (“Buyer Bank”), Cambridge Bancorp (“Com

July 15, 2024 S-8 POS

As filed with the Securities and Exchange Commission on July 15, 2024

As filed with the Securities and Exchange Commission on July 15, 2024 Registration Nos.

July 15, 2024 8-K

Completion of Acquisition or Disposition of Assets

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 12, 2024 CAMBRIDGE BANCORP (Exact name of Registrant as Specified in Its Charter) Massachusetts 001-38184 04-2777442 (State or Other Jurisdiction of Incorporation) (Commission Fi

July 15, 2024 POS AM

As filed with the Securities and Exchange Commission on July 15, 2024

As filed with the Securities and Exchange Commission on July 15, 2024 Registration No.

May 28, 2024 EX-99.1

# # #

Exhibit 99.1 FOR IMMEDIATE RELEASE Eastern Bankshares, Inc. And Cambridge Bancorp Announce Regulatory Approvals Received To Merge BOSTON, MA, May 28, 2024 – Eastern Bankshares, Inc. (“Eastern”) (NASDAQ Global Select Market: EBC), the stock holding company for Eastern Bank, and Cambridge Bancorp (NASDAQ: CATC) (“Cambridge”), the parent company of Cambridge Trust Company, today jointly announced the

May 28, 2024 8-K

Current Report

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 28, 2024 CAMBRIDGE BANCORP (Exact name of Registrant as Specified in Its Charter) Massachusetts 001-38184 04-2777442 (State or Other Jurisdiction of Incorporation) (Commission Fil

May 9, 2024 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 10-Q (Mark One) ☒ 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: 001-38184 CAMBRIDGE BANCORP (Exact Name of Registrant as Specified in its Charter) Massachusetts 04-2777442 (State or other jurisdiction of incorporation or organization) (I.

April 23, 2024 EX-99.1

Contents 03 Company Profile 04 Financial Highlights 09 Total Assets and Loans This presentation includes non-GAAP measures and should be reviewed with the Company’s Q1 2024 Earnings Release and SEC filings.

EX-99.1 Exhibit 99.1 Investor Presentation April 23, 2024 NASDAQ: CATC Parent of Cambridge Trust Company Contents 03 Company Profile 04 Financial Highlights 09 Total Assets and Loans This presentation includes non-GAAP measures and should be reviewed with the Company’s Q1 2024 Earnings Release and SEC filings. Company Profile As of March 31, 2024 ▪ Banking subsidiary: Cambridge Trust Company (1890

April 23, 2024 EX-99.1

Cambridge Bancorp Announces First Quarter 2024 Results and Declares Quarterly Dividend

Exhibit: 99.1 FOR IMMEDIATE RELEASE Cambridge Bancorp Announces First Quarter 2024 Results and Declares Quarterly Dividend CAMBRIDGE, MA. (April 23, 2024) - Cambridge Bancorp (NASDAQ: CATC) (the “Company”), the parent company of Cambridge Trust Company, today announced unaudited net income of $6.9 million for the three months ended March 31, 2024, a decrease of $1.1 million, or 14.3%, as compared

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 CAMBRIDGE BANCORP (Exact name of Registrant as Specified in Its Charter) Massachusetts (State or Other Jurisdiction of Incorporation) 001-38184 (Commission File Number)

April 23, 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): April 23, 2024 CAMBRIDGE BANCORP

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 CAMBRIDGE BANCORP (Exact name of Registrant as Specified in Its Charter) Massachusetts 001-38184 04-2777442 (State or Other Jurisdiction of Incorporation) (Commission F

March 12, 2024 EX-21

Subsidiaries of the Registrant

Exhibit 21 Subsidiaries Cambridge Bancorp Subsidiary: Name Jurisdiction of Incorporation Cambridge Trust Company Massachusetts Cambridge Trust Company Subsidiaries: Name Jurisdiction of Incorporation Cambridge Trust Company of New Hampshire, Inc. New Hampshire CTC Security Corporation Massachusetts CTC Security Corporation III Massachusetts

March 12, 2024 10-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-K (Mark One) ☒ 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 001-38184 CAMBRIDGE BANCO

March 12, 2024 EX-10.12

Offer letter to Jeffrey F. Smith, dated May 17, 2023.

Exhibit 10.12 May 17, 2023 Jeffrey Smith Dear Jeff, This offer letter replaces in its entirety all previously provided written offer letters to you regarding the position of Executive Vice President, Head of Wealth Management at Cambridge Trust Company ("Bank"). If you accept our offer, you will be reporting to Denis Sheahan, President and Chief Executive Officer of the Bank. Your start date will

March 12, 2024 EX-97.1

Cambridge Bancorp Incentive Compensation Recoupment Policy, effective October 2023.

Exhibit 97.1 CAMBRIDGE BANCORP INCENTIVE-COMPENSATION RECOUPMENT POLICY EFFECTIVE October 2, 2023 1. Policy Purpose; Effective Date and Retroactive Application. The purpose of this Cambridge Bancorp (the “Company”) Recoupment Policy (this “Policy”) is to enable the Company to recoup Erroneously Awarded Compensation in the event that the Company is required to prepare an Accounting Restatement. Thi

March 12, 2024 EX-10.13

Change in Control Agreement with Kerri Mooney, dated August 6, 2019

Exhibit 10.13 Cambridge Bancorp 1336 Massachusetts Avenue Cambridge, Massachusetts 02138 As of August 6, 2019 Ms. Kerri Mooney Dear Kerri: As you know, you previously entered into a letter agreement with Cambridge Bancorp (the "Company") dated January 30, 2017, and you subsequently agreed to amend and restate that letter agreement on November 20, 2018 (the “Prior Agreement”). The Prior Agreement s

March 12, 2024 EX-10.11

Change in Control Agreement with Jeffrey F. Smith, dated July 17, 2023.

Exhibit 10.11 July 27, 2023 EXECUTION COPY Mr. Jeffrey Smith Dear Jeff; Cambridge Bancorp (the "Company" or "Parent") considers it essential to the best interest of its stockholders to foster the continuous employment of key management personnel of the Company and its subsidiary, Cambridge Trust Company (the "Bank''). The Board of Directors of the Company (the "Board") recognizes that, as is the c

March 12, 2024 EX-10.14

Change in Control Agreement with Puneet Nevatia, dated August 6, 2019

Exhibit 10.14 Cambridge Bancorp 1336 MassachusettsAvenue Cambridge, Massachusetts 02138 As of August 6, 2019 Mr. Puneet Nevatia Dear Puneet: As you know, you previously entered into a letter agreement with Cambridge Bancorp (the "Company") dated January 30, 2017, and you subsequently agreed to amend and restate that letter agreement on November 20, 2018 (the "Prior Agreement"). The Prior Agreement

February 28, 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): February 28, 2024 CAMBRIDGE BANCO

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): February 28, 2024 CAMBRIDGE BANCORP (Exact name of Registrant as Specified in Its Charter) Massachusetts 001-38184 04-2777442 (State or Other Jurisdiction of Incorporation) (Commissio

February 21, 2024 8-K

Current Report

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): February 20, 2024 CAMBRIDGE BANCORP (Exact Name of Registrant as Specified in Charter) Massachusetts 001-38184 04-2777442 (State or Other Jurisdiction of Incorporation or Organization

February 21, 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): February 20, 2024 CAMBRIDGE BANCO

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): February 20, 2024 CAMBRIDGE BANCORP (Exact Name of Registrant as Specified in Charter) Massachusetts 001-38184 04-2777442 (State or Other Jurisdiction of Incorporation or Organiza

February 13, 2024 SC 13G

CATC / Cambridge Bancorp / VANGUARD GROUP INC - SCHEDULE 13G Passive Investment

SC 13G 1 tv0517-cambridgebancorp.htm SCHEDULE 13G SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Schedule 13G Under the Securities Exchange Act of 1934 Name of issuer: Cambridge Bancorp Title of Class of Securities: Common Stock CUSIP Number: 132152109 Date of Event Which Requires Filing of this Statement: December 29, 2023 Check the appropriate box to designate the rule pursuant to whi

January 30, 2024 EX-99.1

Cambridge Bancorp Announces Results for 2023 and Declares Quarterly Dividend

Exhibit: 99.1 FOR IMMEDIATE RELEASE Cambridge Bancorp Announces Results for 2023 and Declares Quarterly Dividend CAMBRIDGE, MA. (January 30, 2024) - Cambridge Bancorp (NASDAQ: CATC) (the “Company”), the parent company of Cambridge Trust Company, today announced unaudited net income of $34.1 million for the year ended December 31, 2023, a decrease of $18.8 million, or 35.5%, as compared to net inco

January 30, 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 30, 2024 CAMBRIDGE BANCORP (Exact name of Registrant as Specified in Its Charter) Massachusetts (State or Other Jurisdiction of Incorporation) 001-38184 (Commission File Numbe

January 22, 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): January 16, 2024 CAMBRIDGE BANCOR

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 CAMBRIDGE BANCORP (Exact name of Registrant as Specified in Its Charter) Massachusetts 001-38184 04-2777442 (State or Other Jurisdiction of Incorporation) (Commission

January 22, 2024 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): January 16, 2024 CAMBRIDGE BANCORP (Exact name of Registrant as Specified in Its Charter) Massachusetts 001-38184 04-2777442 (State or Other Jurisdiction of Incorporation) (Commission

January 17, 2024 425

Filed by Cambridge Bancorp

425 Filed by Cambridge Bancorp (Commission File No. 001-38184) pursuant to Rule 425 under the Securities Act of 1933 Subject Company: Cambridge Bancorp (Commission File No. 001-38184) Cambridge Bancorp (“Cambridge”) is mailing the following letter to Cambridge shareholders of record as of the record date for the special meeting of Cambridge shareholders: January 16, 2024 Dear Cambridge Bancorp Sha

January 16, 2024 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 11, 2024 CORRESP

January 11, 2024

January 11, 2024 VIA EDGAR U.S. Securities and Exchange Commission Division of Corporate Finance 100 F Street, N.E. Washington, D.C. 20549 Attention: Michael Volley Amit Pande Madeleine Joy Mateo James Lopez RE: Cambridge Bancorp Form 10-K for the Year Ended December 31, 2022 Form 10-Q for the Quarter Ended September 30, 2023 Response dated December 19, 2023 File No. 001-38184 Ladies and Gentlemen

December 19, 2023 CORRESP

Interest

December 19, 2023 VIA EDGAR U.S. Securities and Exchange Commission Division of Corporate Finance 100 F Street, N.E. Washington, D.C. 20549 Attention: Michael Volley Amit Pande Madeleine Mateo James Jopez RE: Cambridge Bancorp Form 10-K for the Year Ended December 31, 2022 Form 10-Q for the Quarter Ended September 30, 2023 File No. 001-38184 Ladies and Gentlemen: Reference is made to your letter,

December 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): December 19, 2023 CAMBRIDGE BANCO

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 19, 2023 CAMBRIDGE BANCORP (Exact name of Registrant as Specified in Its Charter) Massachusetts 001-38184 04-2777442 (State or Other Jurisdiction of Incorporation) (Commissio

December 19, 2023 EX-10.3

Form of Restricted Stock Unit Agreement – Service-Vesting Restricted Stock Units

Exhibit 10.3 CAMBRIDGE BANCORP 2017 EQUITY AND CASH INCENTIVE PLAN RESTRICTED STOCK UNIT AGREEMENT SERVICE-VESTING RESTRICTED STOCK UNITS Cambridge Bancorp, a Massachusetts corporation (the “Company”), hereby issues to the Grantee on the Date of Grant, restricted stock units (“RSUs”) representing the unfunded and unsecured right, subject to forfeiture, to receive shares of the Company’s Common Sto

December 19, 2023 EX-10.2

Form of Restricted Stock Unit Agreement – Performance-Vesting Restricted Stock Units

Exhibit 10.2 CAMBRIDGE BANCORP 2017 EQUITY AND CASH INCENTIVE PLAN RESTRICTED STOCK UNIT AGREEMENT PERFORMANCE-VESTING RESTRICTED STOCK UNITS Cambridge Bancorp, a Massachusetts corporation (the “Company”), hereby issues to the Grantee on the Date of Grant, the target number of restricted stock units (“PRSUs”) set forth below, which PRSUs represent the unfunded and unsecured right, subject to forfe

December 19, 2023 EX-10.1

Form of Restricted Stock Agreement

Exhibit 10.1 CAMBRIDGE BANCORP 2017 EQUITY AND CASH INCENTIVE PLAN RESTRICTED STOCK AGREEMENT Cambridge Bancorp, a Massachusetts corporation (the “Company”), hereby issues to the Grantee on the Date of Grant, the number of shares of the Company’s Common Stock, $1.00 par value, as set forth below (the “Restricted Stock”) on the terms and conditions and subject to the restrictions set forth in this

November 2, 2023 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 10-Q (Mark One) ☒ 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: 001-38184 CAMBRIDGE BANCORP (Exact Name of Registrant as Specified in its Charter) Massachusetts 04-2777442 (State or other jurisdiction of incorporation or organization) (I.

October 17, 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 17, 2023 CAMBRIDGE BANCORP (Exact name of Registrant as Specified in Its Charter) Massachusetts (State or Other Jurisdiction of Incorporation) 001-38184 (Commission File Numbe

October 17, 2023 EX-99.1

Cambridge Bancorp Announces Third Quarter 2023 Results and Declares Dividend

Exhibit: 99.1 FOR IMMEDIATE RELEASE Cambridge Bancorp Announces Third Quarter 2023 Results and Declares Dividend CAMBRIDGE, MA. (October 17, 2023) - Cambridge Bancorp (NASDAQ: CATC) (the “Company”), the parent company of Cambridge Trust Company (the “Bank”), today announced unaudited net income of $6.5 million for the three months ended September 30, 2023, a decrease of $571,000, or 8.0%, as compa

September 19, 2023 425

* * * * * *

Filed by Cambridge Bancorp (Commission File No. 001-38184) 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: Cambridge Bancorp (Commission File No. 001-38184) This filing relates to the proposed merger involving Eastern Bankshares, Inc. (“Eastern”), Eastern Bank, a wholly owned subsidiary of Eas

September 19, 2023 425

* * * * * *

Filed by Cambridge Bancorp (Commission File No. 001-38184) 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: Cambridge Bancorp (Commission File No. 001-38184) This filing relates to the proposed merger involving Eastern Bankshares, Inc. (“Eastern”), Eastern Bank, a wholly owned subsidiary of Eas

September 19, 2023 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): September 18, 2023 CAMBRIDGE BANC

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, 2023 CAMBRIDGE BANCORP (Exact name of Registrant as Specified in Its Charter) Massachusetts 001-38184 04-2777442 (State or Other Jurisdiction of Incorporation) (Commissi

September 19, 2023 EX-99.1

Cambridge Bancorp Enters Into Definitive Agreement to Merge with Eastern Bankshares, Inc.

Exhibit 99.1 Cambridge Bancorp Enters Into Definitive Agreement to Merge with Eastern Bankshares, Inc. CAMBRIDGE, MA, September 19, 2023 – Cambridge Bancorp (NASDAQ: CATC) (“Cambridge”), the parent company of Cambridge Trust Company (“Cambridge Trust”), and Eastern Bankshares, Inc. (“Eastern”) (NASDAQ Global Select Market: EBC), the stock holding company for Eastern Bank, announced they have enter

September 19, 2023 EX-10.1

Change in Control Agreement with Joseph Sapienza, dated September 18, 2023 (incorporated by reference to Exhibit 10.1 of the Form 8-K filed with the SEC on September 19, 2023)

Exhibit 10.1 September 18, 2023 Mr. Joseph P. Sapienza [****] [****] Dear Joe: Cambridge Bancorp (the “Company” or “Parent”) considers it essential to the best interest of its stockholders to foster the continuous employment of key management personnel of the Company and its subsidiary, Cambridge Trust Company (the “Bank”). The Board of Directors of the Company (the “Board”) recognizes that, as is

September 19, 2023 425

* * * * * *

Filed by Cambridge Bancorp (Commission File No. 001-38184) 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: Cambridge Bancorp (Commission File No. 001-38184) This filing relates to the proposed merger involving Eastern Bankshares, Inc. (“Eastern”), Eastern Bank, a wholly owned subsidiary of Eas

September 19, 2023 EX-2.1

Agreement and Plan of Merger by and among Eastern Bankshares, Inc., Eastern Bank, Citadel MS 2023, Inc., Cambridge Bancorp and Cambridge Trust Company, dated as of September 19, 2023*

Exhibit 2.1 AGREEMENT AND PLAN OF MERGER DATED AS OF SEPTEMBER 19, 2023 BY AND AMONG EASTERN BANKSHARES, INC., EASTERN BANK, CITADEL MS 2023, INC., CAMBRIDGE BANCORP, AND CAMBRIDGE TRUST COMPANY TABLE OF CONTENTS ARTICLE I THE TRANSACTIONS 1 Section 1.01 The Transactions 1 Section 1.02 Closing 2 Section 1.03 Effective Times 2 Section 1.04 Organizational Documents 3 Section 1.05 Directors and Offic

September 19, 2023 8-K

Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers, Entry into a Material Definitive Agreement, 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): September 18, 2023 CAMBRIDGE BANCORP (Exact name of Registrant as Specified in Its Charter) Massachusetts 001-38184 04-2777442 (State or Other Jurisdiction of Incorporation) (Commissi

August 3, 2023 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 10-Q (Mark One) ☒ 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: 001-38184 CAMBRIDGE BANCORP (Exact Name of Registrant as Specified in its Charter) Massachusetts 04-2777442 (State or other jurisdiction of incorporation or organization) (I.

July 18, 2023 EX-99.1

Contents 03 Company Profile 06 Financial Highlights 19 Strategic Focus 24 Appendix This presentation includes non-GAAP measures and should be reviewed with the Company’s Q2 2023 Earnings Release and SEC filings.

EX-99.1 Exhibit 99.1 Investor Presentation July 18, 2023 NASDAQ: CATC Parent of Cambridge Trust Company Contents 03 Company Profile 06 Financial Highlights 19 Strategic Focus 24 Appendix This presentation includes non-GAAP measures and should be reviewed with the Company’s Q2 2023 Earnings Release and SEC filings. Company Profile As of June 30, 2023 ▪ Banking subsidiary: Cambridge Trust Company (1

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 17, 2023 CAMBRIDGE BANCORP (

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 17, 2023 CAMBRIDGE BANCORP (Exact name of Registrant as Specified in Its Charter) Massachusetts (State or Other Jurisdiction of Incorporation) 001-38184 (Commission File Number)

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 CAMBRIDGE BANCORP (

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 CAMBRIDGE BANCORP (Exact name of Registrant as Specified in Its Charter) Massachusetts 001-38184 04-2777442 (State or Other Jurisdiction of Incorporation) (Commission Fi

July 18, 2023 EX-99.1

Cambridge Bancorp Announces Second Quarter 2023 Results and Declares Dividend

Exhibit: 99.1 FOR IMMEDIATE RELEASE Cambridge Bancorp Announces Second Quarter 2023 Results and Declares Dividend CAMBRIDGE, MA. (July 18, 2023) - Cambridge Bancorp (NASDAQ: CATC) (the “Company”), the parent company of Cambridge Trust Company (the “Bank”), today announced unaudited net income of $7.1 million for the three months ended June 30, 2023, a decrease of $5.3 million, or 42.7%, as compare

June 12, 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): June 12, 2023 CAMBRIDGE BANCORP (

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 12, 2023 CAMBRIDGE BANCORP (Exact name of Registrant as Specified in Its Charter) Massachusetts (State or Other Jurisdiction of Incorporation) 001-38184 (Commission File Number)

May 16, 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

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 15, 2023 CAMBRIDGE BANCORP (Exact name of Registrant as Specified in Its Charter) Massachusetts 001-38184 04-2777442 (State or Other Jurisdiction of Incorporation) (Commission Fil

May 4, 2023 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 10-Q (Mark One) ☒ 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: 001-38184 CAMBRIDGE BANCORP (Exact Name of Registrant as Specified in its Charter) Massachusetts 04-2777442 (State or other jurisdiction of incorporation or organization) (I.

April 25, 2023 EX-99

Cambridge Bancorp Announces First Quarter 2023 Results

EX: 99-1 FOR IMMEDIATE RELEASE Cambridge Bancorp Announces First Quarter 2023 Results CAMBRIDGE, MA.

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 CAMBRIDGE BANCORP

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 CAMBRIDGE BANCORP (Exact name of Registrant as Specified in Its Charter) Massachusetts (State or Other Jurisdiction of Incorporation) 001-38184 (Commission File Number)

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 CAMBRIDGE BANCORP

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 CAMBRIDGE BANCORP (Exact name of Registrant as Specified in Its Charter) Massachusetts 001-38184 04-2777442 (State or Other Jurisdiction of Incorporation) (Commission F

April 25, 2023 EX-99.1

Contents 03 Company Profile 06 Financial Highlights 19 Strategic Focus 24 Appendix This presentation includes non-GAAP measures and should be reviewed with the Company’s Q1 2023 Earnings Release and SEC filings.

EX-99.1 Exhibit 99.1 Investor Presentation April 25, 2023 NASDAQ: CATC Parent of Cambridge Trust Company Contents 03 Company Profile 06 Financial Highlights 19 Strategic Focus 24 Appendix This presentation includes non-GAAP measures and should be reviewed with the Company’s Q1 2023 Earnings Release and SEC filings. Company Profile As of March 31, 2023 ▪ Banking subsidiary: Cambridge Trust Company

March 16, 2023 EX-21

Subsidiaries of the Registrant

Exhibit 21 Subsidiaries Cambridge Bancorp Subsidiary: Name Jurisdiction of Incorporation Cambridge Trust Company Massachusetts Cambridge Trust Company Subsidiaries: Name Jurisdiction of Incorporation Cambridge Trust Company of New Hampshire, Inc. New Hampshire CTC Security Corporation Massachusetts CTC Security Corporation III Massachusetts

March 16, 2023 DEF 14A

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A (RULE 14a-101) SCHEDULE 14A INFORMATION 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 (RULE 14a-101) 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 ☐ Confidential, for Use of the Commission Only (as

March 16, 2023 EX-10

Transition Agreement and General Release with Thomas J. Fontaine, dated December 9, 2022

Exhibit 10.13 TRANSITION AGREEMENT AND GENERAL RELEASE This Transition Agreement and General Release (this “Agreement”) is being entered into by and between Cambridge Trust Company, a Massachusetts-chartered trust company (the “Company”), Cambridge Bancorp, a Massachusetts corporation (“Cambridge”), and Thomas J. Fontaine (“Employee”). The Company, Cambridge and Employee may hereafter be referred

March 16, 2023 EX-10

Nonqualified Deferred Compensation Plan Adoption Agreement

Exhibit: 10.15 NONQUALIFIED DEFERRED COMPENSATION PLAN ADOPTION AGREEMENT (Including Code §409A provisions) Nonqualified Deferred Compensation Plan Adoption Agreement NONQUALIFIED DEFERRED COMPENSATION PLAN ADOPTION AGREEMENT The undersigned Cambridge Trust Company (“Employer”) by execution of this Adoption Agreement hereby establishes this Nonqualified Deferred Compensation Plan (“Plan”) consisti

March 16, 2023 EX-10

Nonqualified Deferred Compensation Plan Basic Plan Document

Exhibit: 10.16 NONQUALIFIED DEFERRED COMPENSATION PLAN BASIC PLAN DOCUMENT (Including Code §409A provisions) Nonqualified Deferred Compensation Prototype Plan NONQUALIFIED DEFERRED COMPENSATION PLAN BASIC PLAN DOCUMENT By execution of the Adoption Agreement associated with this Basic Plan Document, the Employer establishes this Nonqualified Deferred Compensation Plan (“Plan”) for the benefit of ce

March 16, 2023 EX-10

Transition Agreement and General Release with Jennifer A. Pline, dated December 30, 2022

Exhibit 10.14 TRANSITION AGREEMENT AND GENERAL RELEASE This Transition Agreement and General Release (this “Agreement”) is being entered into by and between Cambridge Trust Company, a Massachusetts-chartered trust company (the “Company”), Cambridge Bancorp, a Massachusetts corporation (“Cambridge”), and Jennifer A. Pline (“Employee”). The Company, Cambridge and Employee may hereafter be referred t

March 16, 2023 10-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-K (Mark One) ☒ 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 001-38184 CAMBRIDGE BANCO

March 16, 2023 DEFA14A

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A (RULE 14a-101) SCHEDULE 14A INFORMATION 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 (RULE 14a-101) 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 ☐ Confidential, for Use of the Commission Only (as

March 14, 2023 EX-99

CAMBRIDGE BANCORP ANNOUNCES 2022 ANNUAL MEETING DATE AND RENEWAL OF SHARE REPURCHASE PLAN

EX: 99-1 CAMBRIDGE BANCORP ANNOUNCES 2022 ANNUAL MEETING DATE AND RENEWAL OF SHARE REPURCHASE PLAN CAMBRIDGE, MA.

March 14, 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

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 13, 2023 CAMBRIDGE BANCORP (Exact name of Registrant as Specified in Its Charter) Massachusetts 001-38184 04-2777442 (State or Other Jurisdiction of Incorporation) (Commission F

January 24, 2023 EX-99.1

03 Company Profile 07 Financial Highlights 20 Strategic Focus 26 Appendix Contents This presentation includes non-GAAP measures and should be reviewed with the Company’s Q4 2022 Earnings Release and SEC filings.

NASDAQ: CATC Parent of Cambridge Trust Company Investor Presentation January 24, 2023 Exhibit 99.

January 24, 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): January 24, 2023 CAMBRIDGE BANCORP (Exact name of Registrant as Specified in Its Charter) Massachusetts 001-38184 04-2777442 (State or Other Jurisdiction of Incorporation) (Commission

January 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): January 24, 2023 CAMBRIDGE BANCORP (Exact name of Registrant as Specified in Its Charter) Massachusetts (State or Other Jurisdiction of Incorporation) 001-38184 (Commission File Numbe

January 24, 2023 EX-99.1

Cambridge Bancorp Announces Results for 2022 and Declares Increased Dividend

EX: 99-1 FOR IMMEDIATE RELEASE Cambridge Bancorp Announces Results for 2022 and Declares Increased Dividend CAMBRIDGE, MA.

January 4, 2023 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): December 30, 2022 CAMBRIDGE BANCORP (Exact name of Registrant as Specified in Its Charter) Massachusetts (State or Other Jurisdiction of Incorporation) 001-38184 (Commission File Numb

December 13, 2022 EX-99.1

Cambridge Trust Announces Promotions and Retirement Bank highlights new executive leadership

Ex 99.1 Ex. 99.1 Cambridge Trust Announces Promotions and Retirement Bank highlights new executive leadership CAMBRIDGE, MA ? December 13, 2022 ? Cambridge Trust Company, subsidiary of Cambridge Bancorp (NASDAQ: CATC), announces changes to its commercial lending team in connection with the retirement of Martin Millane, Executive Vice President, Chief Lending Officer. Effective January 1, 2023, Ste

December 13, 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): December 9, 2022 CAMBRIDGE BANCORP (Exact name of Registrant as Specified in Its Charter) Massachusetts (State or Other Jurisdiction of Incorporation) 001-38184 (Commission File Numbe

November 3, 2022 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 10-Q (Mark One) ☒ 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: 001-38184 CAMBRIDGE BANCORP (Exact Name of Registrant as Specified in its Charter) Massachusetts 04-2777442 (State or other jurisdiction of incorporation or organization) (I.

October 24, 2022 CORRESP

Cambridge Bancorp 1336 Massachusetts Avenue Cambridge, MA 02138

Cambridge Bancorp 1336 Massachusetts Avenue Cambridge, MA 02138 October 24, 2022 VIA EDGAR Securities and Exchange Commission 100 F Street, N.

October 18, 2022 EX-99.1

Cambridge Bancorp Announces Third Quarter 2022 Earnings and Declares Quarterly Dividend

EX: 99-1 FOR IMMEDIATE RELEASE Cambridge Bancorp Announces Third Quarter 2022 Earnings and Declares Quarterly Dividend CAMBRIDGE, MA.

October 18, 2022 S-3

As filed with the Securities and Exchange Commission on October 18, 2022

Table of Contents As filed with the Securities and Exchange Commission on October 18, 2022 Registration No.

October 18, 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 18, 2022 CAMBRIDGE BANCORP (Exact name of Registrant as Specified in Its Charter) Massachusetts (State or Other Jurisdiction of Incorporation) 001-38184 (Commission File Numbe

October 18, 2022 EX-FILING FEES

Filing Fee Table.

Exhibit 107 Calculation of Filing Fee Tables S-3 (Form Type) Cambridge Bancorp (Exact Name of Registrant as Specified in its Charter) Table 1: Newly Registered and Carry Forward Securities Security Type Security Class Title Fee Calculation or Carry Forward Rule Amount Registered (1) Proposed Maximum Offering Price Per Unit Maximum Aggregate Offering Price Fee Rate Amount of Registration Fee Carry

October 18, 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): October 18, 2022 CAMBRIDGE BANCORP (Exact name of Registrant as Specified in Its Charter) Massachusetts 001-38184 04-2777442 (State or Other Jurisdiction of Incorporation) (Commission

October 18, 2022 EX-99.1

Contents 03 Company Profile 07 Financial Highlights 19 Merger with Northmark Bank 22 Strategic Focus 27 Appendix This presentation includes non-GAAP measures and should be reviewed with the Company’s Q3 2022 Earnings Release and SEC filings.

Exhibit 99.1 Investor Presentation October 18, 2022 NASDAQ: CATC Parent of Cambridge Trust Company Contents 03 Company Profile 07 Financial Highlights 19 Merger with Northmark Bank 22 Strategic Focus 27 Appendix This presentation includes non-GAAP measures and should be reviewed with the Company?s Q3 2022 Earnings Release and SEC filings. Company Profile As of September 30, 2022 ? Banking subsidia

October 14, 2022 POS AM

As filed with the Securities and Exchange Commission on October 14, 2022

As filed with the Securities and Exchange Commission on October 14, 2022 Registration No.

October 4, 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): October 1, 2022 CAMBRIDGE BANCORP (Exact name of Registrant as Specified in Its Charter) Massachusetts (State or Other Jurisdiction of Incorporation) 001-38184 (Commission File Number

October 4, 2022 EX-99.1

Cambridge Bancorp Announces Andy Zelleke to join its Board of Directors

EX: 99-1 FOR IMMEDIATE RELEASE Cambridge Bancorp Announces Andy Zelleke to join its Board of Directors CAMBRIDGE, Mass.

October 3, 2022 EX-99.1

Cambridge Bancorp Announces Completion of Merger with Northmark Bank Combined company creates an estimated $5.6 billion banking franchise and expands presence in attractive markets Systems conversion expected to take place in the second quarter of 20

EX: 99-1 FOR IMMEDIATE RELEASE Cambridge Bancorp Announces Completion of Merger with Northmark Bank Combined company creates an estimated $5.

October 3, 2022 8-K

Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers, Completion of Acquisition or Disposition of Assets

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 1, 2022 CAMBRIDGE BANCORP (Exact name of Registrant as Specified in Its Charter) Massachusetts (State or Other Jurisdiction of Incorporation) 001-38184 (Commission File Number

August 4, 2022 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 10-Q (Mark One) ? 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: 001-38184 CAMBRIDGE BANCORP (Exact Name of Registrant as Specified in its Charter) Massachusetts 04-2777442 (State or other jurisdiction of incorporation or organization) (I.

July 19, 2022 EX-99.1

Contents 03 Company Profile 07 Financial Highlights 19 Merger with Northmark Bank 22 Strategic Focus 27 Appendix This presentation includes non-GAAP measures and should be reviewed with the Company’s Q2 2022 Earnings Release and SEC filings.

Exhibit 99.1 Investor Presentation July 19, 2022 NASDAQ: CATC Parent of Cambridge Trust Company Contents 03 Company Profile 07 Financial Highlights 19 Merger with Northmark Bank 22 Strategic Focus 27 Appendix This presentation includes non-GAAP measures and should be reviewed with the Company?s Q2 2022 Earnings Release and SEC filings. Company Profile As of June 30, 2022 ? Banking subsidiary: Camb

July 19, 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 19, 2022 CAMBRIDGE BANCORP (Exact name of Registrant as Specified in Its Charter) Massachusetts (State or Other Jurisdiction of Incorporation) 001-38184 (Commission File Number)

July 19, 2022 EX-99.1

Cambridge Bancorp Announces Second Quarter 2022 Earnings and Declares Quarterly Dividend

EX: 99-1 FOR IMMEDIATE RELEASE Cambridge Bancorp Announces Second Quarter 2022 Earnings and Declares Quarterly Dividend CAMBRIDGE, MA.

July 19, 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): July 19, 2022 CAMBRIDGE BANCORP (Exact name of Registrant as Specified in Its Charter) Massachusetts 001-38184 04-2777442 (State or Other Jurisdiction of Incorporation) (Commission Fi

July 11, 2022 424B3

Proxy Statement/Prospectus MERGER PROPOSED—YOUR VOTE IS VERY IMPORTANT

Table of Contents Filed Pursuant to Rule 424(b)(3) Registration No. 333-265854 Prospectus Proxy Statement/Prospectus MERGER PROPOSED?YOUR VOTE IS VERY IMPORTANT Dear Shareholder: On May 23, 2022, the boards of directors of Cambridge Bancorp (?Cambridge?), Cambridge?s wholly-owned subsidiary, Cambridge Trust Company, and Northmark Bank (?Northmark?) each approved a merger agreement among Cambridge,

July 7, 2022 EX-99.3

Form of Proxy Card of Northmark Bank.

Exhibit 99.3 NORTHMARK BANK Proxy for Special Meeting of Stockholders to be held August 31, 2022 THIS PROXY IS SOLICITED ON BEHALF OF THE BOARD OF DIRECTORS OF NORTHMARK BANK The undersigned, revoking all prior proxies, hereby appoints Daniel J. Murphy III and Jane C. Walsh, and each of them acting singly, as proxies, each with the power to appoint his or her substitute, to represent and vote as d

July 7, 2022 S-4/A

As filed with the Securities and Exchange Commission on July 7, 2022

Table of Contents As filed with the Securities and Exchange Commission on July 7, 2022 Registration No.

July 7, 2022 CORRESP

CAMBRIDGE BANCORP 1336 Massachusetts Avenue Cambridge, MA 02138 July 7, 2022

CORRESP 1 filename1.htm CAMBRIDGE BANCORP 1336 Massachusetts Avenue Cambridge, MA 02138 July 7, 2022 VIA EDGAR Securities & Exchange Commission 100 F Street, N.E. Washington, D.C. 20549 Attn: John Dana Brown Re: Cambridge Bancorp Registration Statement on Form S-4 (File No. 333-265854) Request for Acceleration of Effective Date Dear Mr. Brown: Pursuant to Rule 461 of the General Rules and Regulati

June 27, 2022 EX-99.1

Consent of Griffin Financial Group, LLC.

Exhibit 99.1 Consent of Griffin Financial Group, LLC We hereby consent to the quotation and summarization of our opinion letter to the board of directors of Northmark Bank (the ?Company?) in the proxy statement/prospectus contained in Cambridge Bancorp?s registration statement on Form S-4 relating to the proposed acquisition of the Company, as well as to the references to our firm and such opinion

June 27, 2022 S-4

As filed with the Securities and Exchange Commission on June 27, 2022

Table of Contents As filed with the Securities and Exchange Commission on June 27, 2022 Registration No.

June 27, 2022 EX-99.3

Form of Proxy Card of Northmark Bank.

Exhibit 99.3 NORTHMARK BANK Proxy for Special Meeting of Stockholders to be held , 2022 THIS PROXY IS SOLICITED ON BEHALF OF THE BOARD OF DIRECTORS OF NORTHMARK BANK The undersigned, revoking all prior proxies, hereby appoints Daniel J. Murphy III as proxy to represent and vote as designated herein all shares of stock of Northmark Bank (the ?Bank?) which the undersigned would be entitled to vote i

June 27, 2022 EX-FILING FEES

Filing Fee Table.

EX-FILING FEES 10 d323227dexfilingfees.htm EX-FILING FEES Exhibit 107 Calculation of Filing Fee Tables Form S-4 (Form Type) Cambridge Bancorp (Exact Name of Registrant as Specified in its Charter) Table 1: Newly Registered and Carry Forward Securities Security Type Security Class Title Fee Calculation or Carry Forward Rule Amount Registered(1) Proposed Maximum Offering Price Per Unit Maximum Aggre

June 27, 2022 EX-99.2

Consent of Director Nominee.

Exhibit 99.2 Consent of Director Nominee In accordance with Rule 438 under the Securities Act of 1933, as amended, the undersigned hereby consents to being named as a person who will become a director of Cambridge Bancorp (?Cambridge?) pursuant to the terms of the Agreement and Plan of Merger by and among Cambridge, Cambridge Trust Company and Northmark Bank, dated as of May 23, 2022, in the proxy

May 23, 2022 EX-99.2

CAMBRIDGE BANCORP AND NORTHMARK BANK SIGN DEFINITIVE AGREEMENT Cambridge Bancorp to expand in attractive markets

Exhibit 99.2 FOR IMMEDIATE RELEASE CAMBRIDGE BANCORP AND NORTHMARK BANK SIGN DEFINITIVE AGREEMENT Cambridge Bancorp to expand in attractive markets CAMBRIDGE, MASSACHUSETTS and NORTH ANDOVER, MASSACHUSETTS ? May 23, 2022 ? Cambridge Bancorp (Nasdaq: CATC) (the ?Company? or ?Cambridge?), the holding company for Cambridge Trust Company (?Cambridge Trust?), and North Andover Massachusetts-based North

May 23, 2022 8-K

Regulation FD Disclosure, Entry into a Material Definitive Agreement, 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): May 23, 2022 CAMBRIDGE BANCORP (Exact name of Registrant as Specified in Its Charter) Massachusetts 001-38184 04-2777442 (State or Other Jurisdiction of Incorporation) (Commission Fil

May 23, 2022 EX-99.1

Forward Looking Statements & Additional Disclosures Certain statements herein may constitute “forward-looking statements” as defined in the Private Securities Litigation Reform Act of 1995. Such forward-looking statements about Cambridge Bancorp (tog

EX-99.1 NASDAQ: CATC Parent of Cambridge Trust Company Cambridge Bancorp Adds Attractive Markets Through A Merger with Northmark Bank May 23, 2022 Exhibit 99.1 Forward Looking Statements & Additional Disclosures Certain statements herein may constitute “forward-looking statements” as defined in the Private Securities Litigation Reform Act of 1995. Such forward-looking statements about Cambridge Ba

May 23, 2022 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): May 23, 2022 CAMBRIDGE BANCORP (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): May 23, 2022 CAMBRIDGE BANCORP (Exact name of Registrant as Specified in Its Charter) Massachusetts 001-38184 04-2777442 (State or Other Jurisdiction of Incorporation) (Commission Fil

May 23, 2022 EX-2.1

Agreement and Plan of Merger, dated May 23, 2022, by and among Cambridge Bancorp, Cambridge Trust Company and Northmark Bank

Exhibit 2.1 Execution Version AGREEMENT AND PLAN OF MERGER DATED AS OF MAY 23, 2022 BY AND AMONG CAMBRIDGE BANCORP, CAMBRIDGE TRUST COMPANY AND NORTHMARK BANK TABLE OF CONTENTS Page ARTICLE I THE MERGER 1 Section 1.01 Terms of the Merger 1 Section 1.02 Tax Consequences 1 Section 1.03 Name of the Surviving Bank 2 Section 1.04 Charter and Bylaws of the Surviving Bank 2 Section 1.05 Directors and Off

May 17, 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 16, 2022 CAMBRIDGE BANCORP (Exact name of Registrant as Specified in Its Charter) Massachusetts 001-38184 04-2777442 (State or Other Jurisdiction of Incorporation) (Commission Fil

May 5, 2022 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 10-Q (Mark One) ? 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: 001-38184 CAMBRIDGE BANCORP (Exact Name of Registrant as Specified in its Charter) Massachusetts 04-2777442 (State or other jurisdiction of incorporation or organization) (I.

April 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): April 20, 2022 CAMBRIDGE BANCORP (Exact name of Registrant as Specified in Its Charter) Massachusetts (State or Other Jurisdiction of Incorporation) 001-38184 (Commission File Number)

April 20, 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): April 20, 2022 CAMBRIDGE BANCORP (Exact name of Registrant as Specified in Its Charter) Massachusetts 001-38184 04-2777442 (State or Other Jurisdiction of Incorporation) (Commission F

April 20, 2022 EX-99.1

Contents 03 Company Profile 07 Financial Highlights 19 Strategic Focus 23 Appendix This presentation includes non-GAAP measures and should be reviewed with the Company’s Q1 2022 Earnings Release and SEC filings.

Exhibit 99.1 Investor Presentation April 20, 2022 NASDAQ: CATC Parent of Cambridge Trust Company Contents 03 Company Profile 07 Financial Highlights 19 Strategic Focus 23 Appendix This presentation includes non-GAAP measures and should be reviewed with the Company?s Q1 2022 Earnings Release and SEC filings. Company Profile As of March 31, 2022 ? Banking subsidiary: Cambridge Trust Company (1890) ?

April 20, 2022 EX-99.1

Cambridge Bancorp Announces First Quarter 2022 Earnings and Declares Quarterly Dividend

EX: 99.1 FOR IMMEDIATE RELEASE Cambridge Bancorp Announces First Quarter 2022 Earnings and Declares Quarterly Dividend CAMBRIDGE, MA. (April 20, 2022) - Cambridge Bancorp (NASDAQ: CATC) (the ?Company?), the parent company of Cambridge Trust Company (the ?Bank?), today announced unaudited net income of $13.3 million for the quarter ended March 31, 2022. Net income for the first quarter was relative

March 17, 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): March 14, 2022 CAMBRIDGE BANCORP (Exact name of Registrant as Specified in Its Charter) Massachusetts 001-38184 04-2777442 (State or Other Jurisdiction of Incorporation) (Commission F

March 16, 2022 DEF 14A

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A (RULE 14a-101) SCHEDULE 14A INFORMATION Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No.)

DEF 14A 1 catcdef14a2022.htm DEF 14A UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A (RULE 14a-101) 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 ☐ Confidentia

March 16, 2022 DEFA14A

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A (RULE 14a-101) SCHEDULE 14A INFORMATION 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 (RULE 14a-101) 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 ? Confidential, for Use of the Commission Only (as

March 15, 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): March 14, 2022 CAMBRIDGE BANCORP (Exact name of Registrant as Specified in Its Charter) Massachusetts 001-38184 04-2777442 (State or Other Jurisdiction of Incorporation) (Commission F

March 15, 2022 EX-99.1

CAMBRIDGE BANCORP ANNOUNCES 2022 ANNUAL MEETING DATE AND RENEWAL OF SHARE REPURCHASE PLAN

EX: 99-1 CAMBRIDGE BANCORP ANNOUNCES 2022 ANNUAL MEETING DATE AND RENEWAL OF SHARE REPURCHASE PLAN CAMBRIDGE, MA.

March 14, 2022 10-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-K (Mark One) ? 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 001-38184 CAMBRIDGE BANCO

March 14, 2022 EX-21

Subsidiaries of the Registrant

Exhibit 21 Subsidiaries Cambridge Bancorp Subsidiary: Name Jurisdiction of Incorporation Cambridge Trust Company Massachusetts Cambridge Trust Company Subsidiaries: Name Jurisdiction of Incorporation Cambridge Trust Company of New Hampshire, Inc. New Hampshire CTC Security Corporation Massachusetts CTC Security Corporation II Massachusetts

March 14, 2022 EX-4.2

Description of Cambridge Bancorp Securities Registered under Section 12 of the Securities Exchange Act of 1934

Exhibit 4.2 CAMBRIDGE BANCORP DESCRIPTION OF SECURITIES REGISTERED UNDER SECTION 12 OF THE SECURITIES EXCHANGE ACT OF 1934 The following description is a general summary of the terms of Cambridge Bancorp?s common stock. The description below does not purport to be complete and is subject to and qualified in its entirety by reference to our articles of organization and amended and restated by-laws,

February 9, 2022 EX-10.1

Cambridge Trust Company Supplemental Executive Retirement Agreement for Michael F. Carotenuto, dated February 7, 2022.

EX: 10.1 CAMBRIDGE TRUST COMPANY SUPPLEMENTAL EXECUTIVE RETIREMENT AGREEMENT THIS SUPPLEMENTAL EXECUTIVE RETIREMENT AGREEMENT (the ?Agreement?) is adopted as of 02/7/2022 by and between CAMBRIDGE TRUST COMPANY, a Massachusetts corporation located in Cambridge, Massachusetts (the ?Bank?), and Michael F. Carotenuto (the ?Executive?). The purpose of this Agreement is to provide specified benefits to

February 9, 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): February 07, 2022 CAMBRIDGE BANCORP (Exact name of Registrant as Specified in Its Charter) Massachusetts 001-38184 04-2777442 (State or Other Jurisdiction of Incorporation) (Commissio

January 25, 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): January 25, 2022 CAMBRIDGE BANCORP (Exact name of Registrant as Specified in Its Charter) Massachusetts 001-38184 04-2777442 (State or Other Jurisdiction of Incorporation) (Commission

January 25, 2022 EX-99.1

Cambridge Bancorp Announces Record Operating Results for 2021 and Increases Dividend by 5%

EX: 99.1 FOR IMMEDIATE RELEASE Cambridge Bancorp Announces Record Operating Results for 2021 and Increases Dividend by 5% CAMBRIDGE, MA. (January 25, 2022) - Cambridge Bancorp (NASDAQ: CATC) (the ?Company?), the parent company of Cambridge Trust Company (the ?Bank?), today announced unaudited net income of $54.0 million for the year ended December 31, 2021, an increase of $22.1 million, or 69.0%,

January 25, 2022 EX-99.1

03 Company Profile 07 Financial Highlights 20 Strategic Focus 25 Appendix Contents This presentation includes non-GAAP measures and should be reviewed with the Company’s Q4 2021 Earnings Release and SEC filings.

NASDAQ: CATC Parent of Cambridge Trust Company Investor Presentation January 25, 2022 Exhibit 99.

January 25, 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 25, 2022 CAMBRIDGE BANCORP (Exact name of Registrant as Specified in Its Charter) Massachusetts (State or Other Jurisdiction of Incorporation) 001-38184 (Commission File Numbe

November 4, 2021 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 10-Q (Mark One) ? 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: 001-38184 CAMBRIDGE BANCORP (Exact Name of Registrant as Specified in its Charter) Massachusetts 04-2777442 (State or other jurisdiction of incorporation or organization) (I.

October 19, 2021 EX-99.1

Contents 03 Company Profile 07 Financial Highlights 20 Strategic Focus 24 Appendix This presentation includes non-GAAP measures and should be reviewed with the Company’s Q3 2021 Earnings Release and SEC filings.Contents 03 Company Profile 07 Financia

EX-99.1 2 d224469dex991.htm EX-99.1 Exhibit 99.1 Investor Presentation October 19, 2021 NASDAQ: CATC Parent of Cambridge Trust CompanyExhibit 99.1 Investor Presentation October 19, 2021 NASDAQ: CATC Parent of Cambridge Trust Company Contents 03 Company Profile 07 Financial Highlights 20 Strategic Focus 24 Appendix This presentation includes non-GAAP measures and should be reviewed with the Company

October 19, 2021 EX-99.1

Cambridge Bancorp Announces Operating Results for the Third Quarter and Declares Dividend

EX-99.1 2 catc-ex991.htm EX-99.1 EX: 99.1 FOR IMMEDIATE RELEASE Cambridge Bancorp Announces Operating Results for the Third Quarter and Declares Dividend CAMBRIDGE, MA. (October 19, 2021) - Cambridge Bancorp (NASDAQ: CATC) (the “Company”), the parent company of Cambridge Trust Company (the “Bank”), today announced unaudited net income of $13.3 million for the quarter ended September 30, 2021, a de

October 19, 2021 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): October 19, 2021 CAMBRIDGE BANCORP (Exact name of Registrant as Specified in Its Charter) Massachusetts 001-38184 04-2777442 (State or Other Jurisdiction of Incorporation) (Commission

October 19, 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 19, 2021 CAMBRIDGE BANCORP (Exact name of Registrant as Specified in Its Charter) Massachusetts (State or Other Jurisdiction of Incorporation) 001-38184 (Commission File Numbe

August 5, 2021 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 10-Q

j UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 10-Q (Mark One) ? 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: 001-38184 CAMBRIDGE BANCORP (Exact Name of Registrant as Specified in its Charter) Massachusetts 04-2777442 (State or other jurisdiction of incorporation or organization) (I.

July 20, 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 20, 2021 CAMBRIDGE BANCORP (Exact name of Registrant as Specified in Its Charter) Massachusetts (State or Other Jurisdiction of Incorporation) 001-38184 (Commission File Number)

July 20, 2021 EX-99.1

Contents 03 Company Profile 07 Financial Highlights 20 Strategic Focus 24 Appendix This presentation includes non-GAAP measures and should be reviewed with the Company’s Q2 2021 Earnings Release and SEC filings.

EX-99.1 2 d120647dex991.htm EX-99.1 Exhibit 99.1 Investor Presentation July 20, 2021 NASDAQ: CATC Parent of Cambridge Trust CompanyExhibit 99.1 Investor Presentation July 20, 2021 NASDAQ: CATC Parent of Cambridge Trust Company Contents 03 Company Profile 07 Financial Highlights 20 Strategic Focus 24 Appendix This presentation includes non-GAAP measures and should be reviewed with the Company’s Q2

July 20, 2021 EX-99.1

Cambridge Bancorp Announces Operating Results for the Second Quarter and Declares Dividend

EX-99.1 2 catc-ex99115.htm EX-99.1 EX: 99.1 FOR IMMEDIATE RELEASE Cambridge Bancorp Announces Operating Results for the Second Quarter and Declares Dividend CAMBRIDGE, MA. (July 20, 2021) - Cambridge Bancorp (NASDAQ: CATC) (the “Company”), the parent company of Cambridge Trust Company (the “Bank”), today announced unaudited net income of $13,944,000 for the quarter ended June 30, 2021, an increase

July 20, 2021 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): July 20, 2021 CAMBRIDGE BANCORP (Exact name of Registrant as Specified in Its Charter) Massachusetts 001-38184 04-2777442 (State or Other Jurisdiction of Incorporation) (Commission Fi

May 18, 2021 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 17, 2021 CAMBRIDGE BANCORP (Exact name of Registrant as Specified in Its Charter) Massachusetts (State or Other Jurisdiction of Incorporation) 001-38184 (Commission File Number) 0

May 6, 2021 10-Q

Quarterly Report - 10-Q

j UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 10-Q (Mark One) ? 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: 001-38184 CAMBRIDGE BANCORP (Exact Name of Registrant as Specified in its Charter) Massachusetts 04-2777442 (State or other jurisdiction of incorporation or organization) (I.

April 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): April 21, 2021 CAMBRIDGE BANCORP (Exact name of Registrant as Specified in Its Charter) Massachusetts (State or Other Jurisdiction of Incorporation) 001-38184 (Commission File Number)

April 21, 2021 EX-99.1

NASDAQ: CATC Parent of Cambridge Trust Company Investor Presentation April 21, 2021 EX: 99.1

EX-99.1 2 catc-ex9916.htm EX-99.1 NASDAQ: CATC Parent of Cambridge Trust Company Investor Presentation April 21, 2021 EX: 99.1 03 Company Profile 07 Financial Highlights 20 Strategic Focus 24 Appendix Contents This presentation includes non-GAAP measures and should be reviewed with our Q1 2021 Earnings Release and the Company’s SEC filings Company Profile Banking subsidiary: Cambridge Trust Compan

April 21, 2021 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): April 21, 2021 CAMBRIDGE BANCORP (Exact name of Registrant as Specified in Its Charter) Massachusetts (State or Other Jurisdiction of Incorporation) 001-38184 (Commission File Number)

April 21, 2021 EX-99.1

Cambridge Bancorp Announces First Quarter 2021 Earnings and Increases Quarterly Dividend by 11%

EX-99.1 2 catc-ex9916.htm EX-99.1 EX: 99.1 FOR IMMEDIATE RELEASE Cambridge Bancorp Announces First Quarter 2021 Earnings and Increases Quarterly Dividend by 11% CAMBRIDGE, MA. (April 21, 2021) - Cambridge Bancorp (NASDAQ: CATC) (the “Company”), the parent company of Cambridge Trust Company (the “Bank”), today announced unaudited net income of $13,499,000 for the quarter ended March 31, 2021, an in

March 17, 2021 DEF 14A

- DEF 14A

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A (RULE 14a-101) 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 ? Confidential, for Use of the Commission Only (as

March 15, 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): March 15, 2021 CAMBRIDGE BANCORP (Exact name of Registrant as Specified in Its Charter) Massachusetts (State or Other Jurisdiction of Incorporation) 001-38184 (Commission File Number)

March 15, 2021 EX-4.2

Description of Cambridge Bancorp Securities Registered under Section 12 of the Securities Exchange Act of 1934.

Exhibit 4.2 CAMBRIDGE BANCORP DESCRIPTION OF SECURITIES REGISTERED UNDER SECTION 12 OF THE SECURITIES EXCHANGE ACT OF 1934 The following description is a general summary of the terms of Cambridge Bancorp?s common stock. The description below does not purport to be complete and is subject to and qualified in its entirety by reference to our articles of organization and amended and restated by-laws,

March 15, 2021 EX-21

Subsidiaries of the Registrant

EX-21 6 catc-ex21172.htm EX-21 Exhibit 21 Subsidiaries Cambridge Bancorp Subsidiary: Name Jurisdiction of Incorporation Cambridge Trust Company Massachusetts Cambridge Trust Company Subsidiaries: Name Jurisdiction of Incorporation Cambridge Trust Company of New Hampshire, Inc. New Hampshire CTC Security Corporation Massachusetts CTC Security Corporation II Massachusetts

March 15, 2021 EX-10.31

Change in Control Agreement with Thomas J. Fontaine, dated December 5, 2019

Exhibit 10.31 EXECUTION VERSION Cambridge Bancorp 1336 Massachusetts Avenue Cambridge, Massachusetts 02138 December 5, 2019 Thomas J. Fontaine Wellesley Bancorp, Inc. 40 Central Street Wellesley, MA 02482 Dear Thomas: Cambridge Bancorp (the “Company”) considers it essential to the best interest of its stockholders to foster the continuous employment of key management personnel of the Company and i

March 15, 2021 EX-10.32

Cambridge Trust Company Supplemental Executive Retirement Agreement for Thomas J. Fontaine, dated December 5, 2019

Exhibit 10.32 CAMBRIDGE TRUST COMPANY SUPPLEMENTAL EXECUTIVE RETIREMENT AGREEMENT THIS SUPPLEMENTAL EXECUTIVE RETIREMENT AGREEMENT (the “Agreement”) is adopted as of [Date of Hire] by and between CAMBRIDGE TRUST COMPANY, a Massachusetts corporation located in Cambridge, Massachusetts (the “Bank”), and Thomas J. Fontaine (the “Executive”). The purpose of this Agreement is to provide specified benef

March 15, 2021 EX-99.1

CAMBRIDGE BANCORP ANNOUNCES 2021 ANNUAL MEETING DATE AND SHARE REPURCHASE PLAN

EX-99.1 2 catc-ex99124.htm EX-99.1 Exhibit: 99.1 CAMBRIDGE BANCORP ANNOUNCES 2021 ANNUAL MEETING DATE AND SHARE REPURCHASE PLAN CAMBRIDGE, MA. (March 15, 2021) - Cambridge Bancorp (NASDAQ: CATC) (the “Company”), the parent of Cambridge Trust Company, today announced that the Company’s 2021 annual meeting of shareholders will be held on May 17, 2021 at 8:30 A.M. The annual meeting will be held virt

March 15, 2021 10-K

Annual Report - 10-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-K (Mark One) ? 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 001-38184 CAMBRIDGE BANCO

March 15, 2021 EX-10.30

Offer Letter for Thomas J. Fontaine, dated December 5, 2019

EX-10.30 3 catc-ex1030293.htm EX-10.30 Exhibit 10.30 EXECUTION VERSION Cambridge Bancorp 1336 Massachusetts Avenue Cambridge, Massachusetts 02138 December 5, 2019 Thomas J. Fontaine Wellesley Bancorp, Inc. 40 Central Street Wellesley, MA 02482 Dear Thomas: As you know, Cambridge Bancorp ("Cambridge"), Cambridge Trust Company (the "Company''), Wellesley Bancorp, Inc. ("Wellesley") and Wellesley Ban

January 26, 2021 8-K

Regulation FD Disclosure, 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): January 26, 2021 CAMBRIDGE BANCORP (Exact name of Registrant as Specified in Its Charter) Massachusetts (State or Other Jurisdiction of Incorporation) 001-38184 (Commission File Numbe

January 26, 2021 EX-99.1

Cambridge Bancorp Declares Increased Dividend and Announces Full Year Operating Earnings For 2020

EX: 99.1 FOR IMMEDIATE RELEASE Cambridge Bancorp Declares Increased Dividend and Announces Full Year Operating Earnings For 2020 CAMBRIDGE, MA. (January 26, 2021) - Cambridge Bancorp (NASDAQ: CATC) (the “Company”), the parent of Cambridge Trust Company (“Cambridge Trust”), today announced net income of $31,959,000 for the year ended December 31, 2020, representing an increase of $6,702,000, or 26.

January 26, 2021 EX-99.1

Investor Presentation January 26, 2021 NASDAQ: CATC Parent of Cambridge Trust Company EX:99.1 CAMBRIDGE BANCORP

EX-99.1 2 catc-ex9916.htm EX-99.1 Investor Presentation January 26, 2021 NASDAQ: CATC Parent of Cambridge Trust Company EX:99.1 CAMBRIDGE BANCORP Forward Looking Statements and Non-GAAP Measures Certain statements herein may constitute “forward-looking statements” as defined in the Private Securities Litigation Reform Act of 1995. Such forward-looking statements about the Company and its industry

January 26, 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 26, 2021 CAMBRIDGE BANCORP (Exact name of Registrant as Specified in Its Charter) Massachusetts (State or Other Jurisdiction of Incorporation) 001-38184 (Commission File Numbe

December 23, 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): December 21, 2020 CAMBRIDGE BANCORP (Exact name of Registrant as Specified in Its Charter) Massachusetts (State or Other Jurisdiction of Incorporation) 001-38184 (Commission File Numb

December 23, 2020 EX-10.1

Consulting Agreement, dated as of December 21, 2020, by and among Cambridge Bancorp and Mark Thompson

EX: 10.1 CONSULTING AGREEMENT This CONSULTING AGREEMENT (the “Agreement”), dated as of December 21, 2020, is made and entered into by and among Cambridge Bancorp, a Massachusetts state-chartered, federally registered bank holding company (the “Company”) and Mark Thompson (“Consultant”) (each herein referred to individually as a “Party,” or collectively as the “Parties”). WHEREAS, the Company desir

December 7, 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): December 1, 2020 CAMBRIDGE BANCORP (Exact name of Registrant as Specified in Its Charter) Massachusetts (State or Other Jurisdiction of Incorporation) 001-38184 (Commission File Numbe

November 6, 2020 10-Q

Quarterly Report - 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 10-Q (Mark One) ☒ 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: 001-38184 CAMBRIDGE BANCORP (Exact Name of Registrant as Specified in its Charter) Massachusetts 04-2777442 (State or other jurisdiction of incorporation or organization) (I.

October 26, 2020 EX-99.1

Investor Presentation October 26, 2020 NASDAQ: CATC Parent of Cambridge Trust Company EX: 99.1

Investor Presentation October 26, 2020 NASDAQ: CATC Parent of Cambridge Trust Company EX: 99.

October 26, 2020 8-K

Regulation FD Disclosure, Financial Statements and Exhibits - 8-K INVESTOR PRESENTATION Q3-2020

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 26, 2020 CAMBRIDGE BANCORP (Exact name of Registrant as Specified in Its Charter) Massachusetts (State or Other Jurisdiction of Incorporation) 001-38184 (Commission File Numbe

October 20, 2020 EX-99.1

Cambridge Bancorp Announces Results for the Third Quarter and Declares Dividend

EX-99.1 2 catc-ex99124.htm EX-99.1 EX: 99.1 FOR IMMEDIATE RELEASE Cambridge Bancorp Announces Results for the Third Quarter and Declares Dividend CAMBRIDGE, MA. (October 20, 2020) - Cambridge Bancorp (NASDAQ: CATC) (the “Company”), the parent company of Cambridge Trust Company (the “Bank”), today announced unaudited net income of $13,429,000 for the quarter ended September 30, 2020, an increase of

October 20, 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 20, 2020 CAMBRIDGE BANCORP (Exact name of Registrant as Specified in Its Charter) Massachusetts (State or Other Jurisdiction of Incorporation) 001-38184 (Commission File Numbe

August 6, 2020 EX-99.2

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, DC 20549 FORM 10-Q

EX: 99.2 UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, DC 20549 FORM 10-Q (Mark one) ☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended March 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: 001-35352 WE

August 6, 2020 8-K/A

Financial Statements and Exhibits

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): June 1, 2020 CAMBRIDGE BANCORP (Exact name of Registrant as Specified in Its Charter) Massachusetts (State or Other Jurisdiction of Incorporation) 001-38184 (Commission File Number)

August 6, 2020 EX-99.3

UNAUDITED PRO FORMA CONDENSED COMBINED FINANCIAL STATEMENTS

Ex: 99.3 UNAUDITED PRO FORMA CONDENSED COMBINED FINANCIAL STATEMENTS On June 1, 2020, Cambridge Bancorp (“Cambridge”), completed its previously announced merger with Wellesley Bancorp, Inc. (“Wellesley”), pursuant to an Agreement and Plan of Merger, dated as of December 5, 2019 (the “Merger Agreement”), by and between Cambridge, Cambridge Trust Company, Wellesley and Wellesley Bank. Under the term

August 6, 2020 10-Q

Quarterly Report - 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 10-Q (Mark One) ☒ 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: 001-38184 CAMBRIDGE BANCORP (Exact Name of Registrant as Specified in its Charter) Massachusetts 04-2777442 (State or other jurisdiction of incorporation or organization) (I.

August 6, 2020 EX-99.1

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, DC 20549 FORM 10-K

EX: 99.1 UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, DC 20549 FORM 10-K (Mark One) ☒ ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 for the fiscal year ended December 31, 2019 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: 001-35352 WELLESL

July 28, 2020 EX-99.1

Investor Presentation July 28, 2020 NASDAQ: CATC Parent of Cambridge Trust Company EX: 99.1

Investor Presentation July 28, 2020 NASDAQ: CATC Parent of Cambridge Trust Company EX: 99.

July 28, 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 28, 2020 CAMBRIDGE BANCORP (Exact name of Registrant as Specified in Its Charter) Massachusetts (State or Other Jurisdiction of Incorporation) 001-38184 (Commission File Number)

July 28, 2020 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): July 28, 2020 CAMBRIDGE BANCORP (Exact name of Registrant as Specified in Its Charter) Massachusetts (State or Other Jurisdiction of Incorporation) 001-38184 (Commission File Number)

July 28, 2020 EX-99.1

Cambridge Bancorp Announces Operating Results for Q2 and Declares Dividend Net loss driven by new merger related accounting. Asset Quality remains strong

EX-99.1 2 catc-ex9917.htm EX-99.1 EX: 99.1 FOR IMMEDIATE RELEASE Cambridge Bancorp Announces Operating Results for Q2 and Declares Dividend Net loss driven by new merger related accounting. Asset Quality remains strong CAMBRIDGE, MA. (July 28, 2020) - Cambridge Bancorp (NASDAQ: CATC) (the “Company”), the parent company of Cambridge Trust Company (the “Bank”), today announced an unaudited net loss

June 9, 2020 EX-24

POWER OF ATTORNEY

Exhibit 24 POWER OF ATTORNEY Know all by these presents, that the undersigned hereby constitutes and appoints each of Denis Sheahan and Michael Carotenuto, or either of them signing singly, and with full power of substitution, the undersigned’s true and lawful attorney-in-fact to: (1) prepare, execute in the undersigned’s name and on the undersigned’s behalf, and submit to the U.

June 1, 2020 EX-99.1

Cambridge Bancorp Announces Completion of Merger with Wellesley Bancorp, Inc.

EX: 99.1 Cambridge Bancorp Announces Completion of Merger with Wellesley Bancorp, Inc. CAMBRIDGE, Mass. (BUSINESS WIRE) — On June 1, 2020, Cambridge Bancorp (NASDAQ: CATC), parent of Cambridge Trust Company, completed its merger with Wellesley Bancorp, Inc. (“Wellesley”), Wellesley Bank (“Wellesley Bank”), Wellesley’s subsidiary bank, and Cambridge Trust Company, the Company’s subsidiary bank. Alt

June 1, 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, Completion of Acquisition or Disposition of Assets

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 1, 2020 CAMBRIDGE BANCORP (Exact name of Registrant as Specified in Its Charter) Massachusetts (State or Other Jurisdiction of Incorporation) 001-38184 (Commission File Number) 0

May 19, 2020 8-K

Submission of Matters to a Vote of Security Holders - 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 18, 2020 CAMBRIDGE BANCORP (Exact name of Registrant as Specified in Its Charter) Massachusetts (State or Other Jurisdiction of Incorporation) 001-38184 (Commission File Number) 0

May 18, 2020 EX-99.1

Investor Presentation May 18, 2020 NASDAQ: CATC Parent of Cambridge Trust Company EX: 99.1

Investor Presentation May 18, 2020 NASDAQ: CATC Parent of Cambridge Trust Company EX: 99.

May 18, 2020 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): May 18, 2020 CAMBRIDGE BANCORP (Exact name of Registrant as Specified in Its Charter) Massachusetts (State or Other Jurisdiction of Incorporation) 001-38184 (Commission File Number) 0

May 8, 2020 10-Q

Quarterly Report - 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 10-Q (Mark One) ☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended March 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: 001-38184 CAMBRIDGE BANCORP (Exact Name of Registrant as Specified in its Charter) Massachusetts 04-2777442 (State or other jurisdiction of incorporation or organization) (I.

April 22, 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): April 22, 2020 CAMBRIDGE BANCORP (Exact name of Registrant as Specified in Its Charter) Massachusetts (State or Other Jurisdiction of Incorporation) 001-38184 (Commission File Number)

April 22, 2020 EX-99.1

Cambridge Bancorp Announces First Quarter 2020 Earnings and Declares Dividend

FOR IMMEDIATE RELEASE Cambridge Bancorp Announces First Quarter 2020 Earnings and Declares Dividend CAMBRIDGE, MA.

March 19, 2020 DEF 14A

CATC / Cambridge Bancorp DEF 14A - - PROXY CARD

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March 19, 2020 EX-16.1

Letter of KPMG LLP, dated as of March 19, 2020

EX: 16.1 March 19, 2020 Securities and Exchange Commission Washington, D.C. 20549 Ladies and Gentlemen: We were previously principal accountants for Cambridge Bancorp and subsidiaries (the Company) and, under the date of March 16, 2020, we reported on the consolidated financial statements of the Company and subsidiaries as of and for the years ended December 31, 2019 and 2018, and the effectivenes

March 19, 2020 DEF 14A

CATC / Cambridge Bancorp DEF 14A - - DEF 14A

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A (RULE 14a-101) 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 ☐ Confidential, for Use of the Commission Only (as

March 19, 2020 8-K

Financial Statements and Exhibits, Changes in Registrant's Certifying Accountant

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 16, 2020 CAMBRIDGE BANCORP (Exact name of Registrant as Specified in Its Charter) Massachusetts (State or Other Jurisdiction of Incorporation) 001-38184 (Commission File Number)

March 17, 2020 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): March 16, 2020 CAMBRIDGE BANCORP (Exact name of Registrant as Specified in Its Charter) Massachusetts (State or Other Jurisdiction of Incorporation) 001-38184 (Commission File Number)

March 17, 2020 EX-4.2

Description of Cambridge Bancorp Securities Registered under Section 12 of the Securities Exchange Act of 1934.

Exhibit 4.2 CAMBRIDGE BANCORP DESCRIPTION OF SECURITIES REGISTERED UNDER SECTION 12 OF THE SECURITIES EXCHANGE ACT OF 1934 The following description is a general summary of the terms of Cambridge Bancorp’s common stock. The description below does not purport to be complete and is subject to and qualified in its entirety by reference to our articles of organization and amended and restated by-laws,

March 17, 2020 EX-21

Subsidiaries of the Registrant

Exhibit 21 Subsidiaries Cambridge Bancorp Subsidiary: Name Jurisdiction of Incorporation Cambridge Trust Company Massachusetts Cambridge Trust Company Subsidiaries: Name Jurisdiction of Incorporation Cambridge Trust Company of New Hampshire, Inc. New Hampshire CTC Security Corporation Massachusetts CTC Security Corporation II Massachusetts

March 17, 2020 10-K

Annual Report - 10-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-K (Mark One) ☒ ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the fiscal year ended December 31, 2019 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 001-38184 CAMBRIDGE BANCO

March 6, 2020 8-K

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): March 6, 2020 CAMBRIDGE BANCORP (Exact name of Registrant as Specified in Its Charter) Massachusetts 001-38184 04-2777442 (State or Other Jurisdiction of Incorporation) (Commissio

March 6, 2020 425

CATC / Cambridge Bancorp 425 - Merger Prospectus - 8-K

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): March 6, 2020 CAMBRIDGE BANCORP (Exact name of Registrant as Specified in Its Charter) Massachusetts 001-38184 04-2777442 (State or Other Jurisdiction of Incorporation) (Commissio

February 28, 2020 425

Time and location of meeting: 8:30 a.m. EST., at the Cambridge Trust Wealth Management office, 75 State Street, 18th Floor Boston, Massachusetts 02109

Filed by Cambridge Bancorp Pursuant to Rule 425 under the Securities Act of 1933, as amended Subject Company: Wellesley Bancorp, Inc.

February 25, 2020 8-K

Regulation FD Disclosure, Financial Statements and Exhibits

8-K 1 catc-8k20200224.htm 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): February 24, 2020 CAMBRIDGE BANCORP (Exact name of Registrant as Specified in Its Charter) Massachusetts (State or Other Jurisdiction of Incorporation) 0

February 25, 2020 EX-99.1

Forward Looking Statements and Non-GAAP Measures This presentation contains forward-looking statements as defined in the Private Securities Litigation Reform Act of 1995. Such forward-looking statements about Cambridge Bancorp (together with its bank

Investor Presentation February 24, 2020 NASDAQ: CATC Parent of Cambridge Trust Company Exhibit: 99.

February 4, 2020 424B3

Joint proxy statement/prospectus MERGER PROPOSED—YOUR VOTE IS VERY IMPORTANT

424B3 Table of Contents Filed Pursuant to Rule 424(b)(3) Registration No. 333-236017 Prospectus Joint proxy statement/prospectus MERGER PROPOSED—YOUR VOTE IS VERY IMPORTANT On December 5, 2019, the boards of directors of Cambridge Bancorp, or Cambridge, Cambridge’s wholly-owned subsidiary, Cambridge Trust Company, Wellesley Bancorp, Inc., or Wellesley, and Wellesley’s wholly-owned subsidiary, Well

February 3, 2020 S-4/A

CATC / Cambridge Bancorp S-4/A - - S-4/A

S-4/A Table of Contents As filed with the Securities and Exchange Commission on February 3, 2020 Registration No.

February 3, 2020 EX-99.5

Form of Proxy Card of Wellesley Bancorp, Inc.

EX-99.5 Exhibit 99.5 VOTE BY INTERNET—www.proxyvote.com Use the Internet to transmit voting instructions and for electronic delivery of information. If the proxy card recipient holds shares in a Plan, vote by 11:59 p.m. Eastern Time on March 9, 2020. Vote by 11:59 p.m. Eastern Time on March 11, 2020 for shares held directly. Have the proxy card in hand when WELLESLEY BANCORP, INC. accessing the we

February 3, 2020 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): February 3, 2020 CAMBRIDGE BANCORP (Exact name of Registrant as Specified in Its Charter) Massachusetts (State or Other Jurisdiction of Incorporation) 001-38184 (Commission File Numbe

February 3, 2020 EX-99.1

Investor Presentation February 3, 2020 NASDAQ: CATC Parent of Cambridge Trust Company EX: 99-1

Investor Presentation February 3, 2020 NASDAQ: CATC Parent of Cambridge Trust Company EX: 99-1 Forward Looking Statements and Non-GAAP Measures This presentation contains forward-looking statements as defined in the Private Securities Litigation Reform Act of 1995.

February 3, 2020 CORRESP

CATC / Cambridge Bancorp CORRESP - -

CORRESP CAMBRIDGE BANCORP 1336 Massachusetts Avenue Cambridge, MA 02138 February 3, 2020 VIA EDGAR Securities & Exchange Commission 100 F Street, N.

February 3, 2020 S-4/A

CATC / Cambridge Bancorp S-4/A - - S-4/A

S-4/A Table of Contents As filed with the Securities and Exchange Commission on February 3, 2020 Registration No.

February 3, 2020 EX-99.4

Form of Proxy Card of Cambridge Bancorp.

EX-99.4 Exhibit 99.4 FORM OF PROXY CARD SPECIAL MEETING OF SHAREHOLDERS OF CAMBRIDGE BANCORP March 16, 2020 PROXY VOTING INSTRUCTIONS INTERNET - Access “www.voteproxy.com” and follow the on-screen instructions or scan the QR code with your smartphone. Have your proxy card available when you access the web page. TELEPHONE - Call toll-free 1-800-PROXIES (1-800-776-9437) in the United States or 1-718

January 28, 2020 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): January 21, 2020 CAMBRIDGE BANCORP (Exact name of Registrant as Specified in Its Charter) Massachusetts (State or Other Jurisdiction of Incorporation) 001-38184 (Commission File Numbe

January 28, 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): January 27, 2020 CAMBRIDGE BANCORP (Exact name of Registrant as Specified in Its Charter) Massachusetts (State or Other Jurisdiction of Incorporation) 001-38184 (Commission File Numbe

January 28, 2020 EX-99.1

CAMBRIDGE BANCORP ANNOUNCES 2020 ANNUAL MEETING DATE

Exhibit 99.1 CONTACT: Cambridge Bancorp Michael F. Carotenuto Chief Financial Officer 617-520-5520 FOR IMMEDIATE RELEASE CAMBRIDGE BANCORP ANNOUNCES 2020 ANNUAL MEETING DATE CAMBRIDGE, MA. (January 27, 2020) - Cambridge Bancorp (NASDAQ: CATC) (the “Company”), the parent of Cambridge Trust Company, today announced that the Company’s 2020 annual meeting of shareholders will be held on May 18, 2020 a

January 22, 2020 S-4

Form of Voting Agreement, dated as of December 5, 2019, by and between certain shareholders of Wellesley Bancorp, Inc., and Cambridge Bancorp (incorporated by reference to Annex A of the joint proxy statement/prospectus included in this registration statement).

S-4 1 d844649ds4.htm S-4 Table of Contents As filed with the Securities and Exchange Commission on January 22, 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 Cambridge Bancorp (Exact name of registrant as specified in its charter) Massachusetts 001-38184 04-2777442 (State or Other J

January 22, 2020 EX-99.2

Consent of Keefe, Bruyette & Woods, Inc.

EX-99.2 Exhibit 99.2 CONSENT OF KEEFE, BRUYETTE & WOODS, INC. We hereby consent to the inclusion of our opinion letter to the Board of Directors of Cambridge Bancorp (“Cambridge”), as Annex C to the Joint Proxy Statement/Prospectus which forms a part of the Registration Statement on Form S-4 filed on the date hereof (the “Registration Statement”) relating to the proposed merger of Wellesley Bancor

January 22, 2020 EX-99.4

Form of Proxy Card of Cambridge Bancorp.

EX-99.4 Exhibit 99.4 FORM OF PRELIMINARY PROXY CARD SPECIAL MEETING OF SHAREHOLDERS OF CAMBRIDGE BANCORP [ ], 2020 PROXY VOTING INSTRUCTIONS INTERNET - Access “www.voteproxy.com” and follow the on-screen instructions or scan the QR code with your smartphone. Have your proxy card available when you access the web page. TELEPHONE - Call toll-free 1-800-PROXIES (1-800-776-9437) in the United States o

January 22, 2020 EX-99.3

Consent of Director Nominee.

EX-99.3 Exhibit 99.3 Consent of Director Nominee In accordance with Rule 438 under the Securities Act of 1933, as amended, the undersigned hereby consents to being named as a person who will become a director of Cambridge Bancorp (“Cambridge”) pursuant to the terms of the Agreement and Plan of Merger by and among Cambridge, Cambridge Trust Company, Wellesley Bancorp, Inc. and Wellesley Bank, dated

January 22, 2020 EX-99.1

Cambridge Bancorp Announces Record Operating Earnings in 2019 and Declares Increased Dividend

EX-99.1 2 catc-ex9918.htm EX-99.1 Ex. 99.1 FOR IMMEDIATE RELEASE Cambridge Bancorp Announces Record Operating Earnings in 2019 and Declares Increased Dividend CAMBRIDGE, MA. (January 22, 2020) - Cambridge Bancorp (NASDAQ: CATC) (the “Company”), the parent of Cambridge Trust Company (“Cambridge Trust”), today announced net income of $25,257,000 for the year ended December 31, 2019, representing an

January 22, 2020 EX-99.1

Consent of Piper Sandler & Co.

EX-99.1 Exhibit 99.1 1251 AVENUE OF THE AMERICAS, 6TH FLOOR NEW YORK, NY 10020 P 212 466-7800 | TF 800 635-6851 Piper Sandler & Co. Since 1985. Member SIPC and NYSE. CONSENT OF PIPER SANDLER & CO. We hereby consent to the inclusion of our opinion letter to the Board of Directors of Wellesley Bancorp, Inc. (the “Company”) as an Annex to the Joint Proxy Statement/Prospectus relating to the proposed

January 22, 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): January 22, 2020 CAMBRIDGE BANCORP (Exact name of Registrant as Specified in Its Charter) Massachusetts (State or Other Jurisdiction of Incorporation) 001-38184 (Commission File Numbe

December 10, 2019 EX-1.1

Underwriting Agreement, dated December 6, 2019, by and between Cambridge Bancorp and Keefe, Bruyette & Woods, Inc.

EX-1.1 2 d823787dex11.htm EX-1.1 Exhibit 1.1 479,000 Shares Cambridge Bancorp Common Stock UNDERWRITING AGREEMENT December 6, 2019 KEEFE, BRUYETTE & WOODS, INC. 787 Seventh Avenue, 5th Floor New York, New York 10019 As representative of the Underwriters listed in Schedule A hereto Ladies and Gentlemen: Cambridge Bancorp, a Massachusetts corporation (the “Company”), proposes to issue and sell to th

December 10, 2019 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): December 5, 2019 CAMBRIDGE BANCORP (Exact name of Registrant as Specified in Its Charter) Massachusetts 001-38184 04-2777442 (State or Other Jurisdiction of Incorporation) (Commis

December 6, 2019 424B5

479,000 Shares Common Stock

424B5 Table of Contents Filed Pursuant to Rule 424(b)(5) Registration Statement No.

December 5, 2019 EX-99.3

RISK FACTORS

EX-99.3 6 d841825dex993.htm EX-99.3 Exhibit 99.3 RISK FACTORS The following risks and uncertainties could have a material adverse effect on our business, financial condition and results of operations. Additional risks and uncertainties not presently known to us or that we currently deem immaterial may also impair our business operation, financial condition or results. Unless otherwise stated or th

December 5, 2019 424B5

SUBJECT TO COMPLETION DATED DECEMBER 5, 2019

424B5 Table of Contents Filed Pursuant to Rule 424(b)(5) Registration Statement No.

December 5, 2019 EX-2.1

Agreement and Plan of Merger, dated December 5, 2019, by and among Cambridge Bancorp, Cambridge Trust Company, Wellesley Bancorp, Inc. and Wellesley Bank.

EX-2.1 2 d841825dex21.htm EX-2.1 Exhibit 2.1 EXECUTION VERSION AGREEMENT AND PLAN OF MERGER DATED AS OF DECEMBER 5, 2019 BY AND AMONG CAMBRIDGE BANCORP, CAMBRIDGE TRUST COMPANY, WELLESLEY BANCORP, INC. AND WELLESLEY BANK TABLE OF CONTENTS Page ARTICLE I THE MERGER 2 Section 1.01 Terms of the Merger 2 Section 1.02 Tax Consequences 2 Section 1.03 Name of the Surviving Bank 2 Section 1.04 Charter and

December 5, 2019 EX-99.3

RISK FACTORS

EX-99.3 Exhibit 99.3 RISK FACTORS The following risks and uncertainties could have a material adverse effect on our business, financial condition and results of operations. Additional risks and uncertainties not presently known to us or that we currently deem immaterial may also impair our business operation, financial condition or results. Unless otherwise stated or the context otherwise indicate

December 5, 2019 EX-99.2

Forward Looking Statements This report contains forward-looking statements as defined in the Private Securities Litigation Reform Act of 1995. Such forward-looking statements about Cambridge Bancorp (together with its bank subsidiary unless the conte

EX-99.2 Cambridge Bancorp Announces Common Equity Offering and Merger with Wellesley Bancorp, Inc. December 5, 2019 NASDAQ: CATC Parent of Cambridge Trust Company Exhibit 99.2 Forward Looking Statements This report contains forward-looking statements as defined in the Private Securities Litigation Reform Act of 1995. Such forward-looking statements about Cambridge Bancorp (together with its bank s

December 5, 2019 EX-99.6

UNAUDITED PRO FORMA COMBINED CONSOLIDATED FINANCIAL STATEMENTS

EX-99.6 Exhibit: 99.6 UNAUDITED PRO FORMA COMBINED CONSOLIDATED FINANCIAL STATEMENTS Merger with Wellesley Bancorp, Inc. On December 5, 2019, Cambridge Bancorp, a Massachusetts corporation (the “Company”), entered into an Agreement and Plan of Merger (the “Merger Agreement”), by and among the Company, Cambridge Trust Company, the Company’s subsidiary bank (“Cambridge Trust”), Wellesley Bancorp, In

December 5, 2019 EX-99.5

WELLESLEY BANCORP, INC. Table of Contents Page No. Part I. Financial Information Item 1. Financial Statements (Unaudited) Consolidated Balance Sheets as of September 30, 2019 and December 31, 2018 2 Consolidated Statements of Comprehensive Income for

EX-99.5 Exhibit 99.5 WELLESLEY BANCORP, INC. Table of Contents Page No. Part I. Financial Information Item 1. Financial Statements (Unaudited) Consolidated Balance Sheets as of September 30, 2019 and December 31, 2018 2 Consolidated Statements of Comprehensive Income for the Three and Nine Months Ended September 30, 2019 and 2018 3 Consolidated Statements of Changes in Stockholders’ Equity for the

December 5, 2019 EX-99.1

CAMBRIDGE BANCORP AND WELLESLEY BANCORP, INC. TO MERGE EXPANDING COMMERCIAL BANKING, PRIVATE BANKING AND WEALTH MANAGEMENT PRESENCE IN GREATER BOSTON

EX-99.1 Exhibit 99.1 FOR IMMEDIATE RELEASE CAMBRIDGE BANCORP AND WELLESLEY BANCORP, INC. TO MERGE EXPANDING COMMERCIAL BANKING, PRIVATE BANKING AND WEALTH MANAGEMENT PRESENCE IN GREATER BOSTON CAMBRIDGE, MASSACHUSETTS and WELLESLEY, MASSACHUSETTS – December 5, 2019 – Cambridge Bancorp (Nasdaq: CATC) (the “Company” or “Cambridge”), the holding company for Cambridge Trust Company (“Cambridge Trust”)

December 5, 2019 EX-99.6

UNAUDITED PRO FORMA COMBINED CONSOLIDATED FINANCIAL STATEMENTS

EX-99.6 Exhibit: 99.6 UNAUDITED PRO FORMA COMBINED CONSOLIDATED FINANCIAL STATEMENTS Merger with Wellesley Bancorp, Inc. On December 5, 2019, Cambridge Bancorp, a Massachusetts corporation (the “Company”), entered into an Agreement and Plan of Merger (the “Merger Agreement”), by and among the Company, Cambridge Trust Company, the Company’s subsidiary bank (“Cambridge Trust”), Wellesley Bancorp, In

December 5, 2019 EX-2.1

Agreement and Plan of Merger, dated December 5, 2019, by and between Cambridge Bancorp, Cambridge Trust Company, Wellesley Bancorp, Inc., and Wellesley Bank (incorporated by reference to Exhibit 2.1 of the Form 8-K filed with the SEC on December 5, 2019)

EX-2.1 Exhibit 2.1 EXECUTION VERSION AGREEMENT AND PLAN OF MERGER DATED AS OF DECEMBER 5, 2019 BY AND AMONG CAMBRIDGE BANCORP, CAMBRIDGE TRUST COMPANY, WELLESLEY BANCORP, INC. AND WELLESLEY BANK TABLE OF CONTENTS Page ARTICLE I THE MERGER 2 Section 1.01 Terms of the Merger 2 Section 1.02 Tax Consequences 2 Section 1.03 Name of the Surviving Bank 2 Section 1.04 Charter and Bylaws of the Surviving B

December 5, 2019 EX-99.2

Forward Looking Statements This report contains forward-looking statements as defined in the Private Securities Litigation Reform Act of 1995. Such forward-looking statements about Cambridge Bancorp (together with its bank subsidiary unless the conte

EX-99.2 Cambridge Bancorp Announces Common Equity Offering and Merger with Wellesley Bancorp, Inc. December 5, 2019 NASDAQ: CATC Parent of Cambridge Trust Company Exhibit 99.2 Forward Looking Statements This report contains forward-looking statements as defined in the Private Securities Litigation Reform Act of 1995. Such forward-looking statements about Cambridge Bancorp (together with its bank s

December 5, 2019 8-K

Entry into a Material Definitive Agreement, 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): December 5, 2019 CAMBRIDGE BANCORP (Exact name of Registrant as Specified in Its Charter) Massachusetts 001-38184 04-2777442 (State or Other Jurisdiction of Incorporation) (Commis

December 5, 2019 425

CATC / Cambridge Bancorp 425 - Merger Prospectus - 8-K

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): December 5, 2019 CAMBRIDGE BANCORP (Exact name of Registrant as Specified in Its Charter) Massachusetts 001-38184 04-2777442 (State or Other Jurisdiction of Incorporation) (Commis

December 5, 2019 EX-99.5

WELLESLEY BANCORP, INC. Table of Contents Page No. Part I. Financial Information Item 1. Financial Statements (Unaudited) Consolidated Balance Sheets as of September 30, 2019 and December 31, 2018 2 Consolidated Statements of Comprehensive Income for

EX-99.5 8 d841825dex995.htm EX-99.5 Exhibit 99.5 WELLESLEY BANCORP, INC. Table of Contents Page No. Part I. Financial Information Item 1. Financial Statements (Unaudited) Consolidated Balance Sheets as of September 30, 2019 and December 31, 2018 2 Consolidated Statements of Comprehensive Income for the Three and Nine Months Ended September 30, 2019 and 2018 3 Consolidated Statements of Changes in

December 5, 2019 EX-99.4

Index to Consolidated Financial Statements of Wellesley Bancorp, Inc. and Subsidiary Report of Independent Registered Public Accounting Firm 2 Consolidated Balance Sheets as of December 31, 2018 and 2017 3 Consolidated Statements of Comprehensive Inc

EX-99.4 Exhibit 99.4 Index to Consolidated Financial Statements of Wellesley Bancorp, Inc. and Subsidiary Report of Independent Registered Public Accounting Firm 2 Consolidated Balance Sheets as of December 31, 2018 and 2017 3 Consolidated Statements of Comprehensive Income for the Years Ended December 31, 2018 and 2017 4 Consolidated Statements of Changes in Stockholders’ Equity for the Years End

December 5, 2019 EX-99.1

CAMBRIDGE BANCORP AND WELLESLEY BANCORP, INC. TO MERGE EXPANDING COMMERCIAL BANKING, PRIVATE BANKING AND WEALTH MANAGEMENT PRESENCE IN GREATER BOSTON

EX-99.1 Exhibit 99.1 FOR IMMEDIATE RELEASE CAMBRIDGE BANCORP AND WELLESLEY BANCORP, INC. TO MERGE EXPANDING COMMERCIAL BANKING, PRIVATE BANKING AND WEALTH MANAGEMENT PRESENCE IN GREATER BOSTON CAMBRIDGE, MASSACHUSETTS and WELLESLEY, MASSACHUSETTS – December 5, 2019 – Cambridge Bancorp (Nasdaq: CATC) (the “Company” or “Cambridge”), the holding company for Cambridge Trust Company (“Cambridge Trust”)

December 5, 2019 EX-99.4

Index to Consolidated Financial Statements of Wellesley Bancorp, Inc. and Subsidiary Report of Independent Registered Public Accounting Firm 2 Consolidated Balance Sheets as of December 31, 2018 and 2017 3 Consolidated Statements of Comprehensive Inc

EX-99.4 Exhibit 99.4 Index to Consolidated Financial Statements of Wellesley Bancorp, Inc. and Subsidiary Report of Independent Registered Public Accounting Firm 2 Consolidated Balance Sheets as of December 31, 2018 and 2017 3 Consolidated Statements of Comprehensive Income for the Years Ended December 31, 2018 and 2017 4 Consolidated Statements of Changes in Stockholders’ Equity for the Years End

November 13, 2019 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 13, 2019 CAMBRIDGE BANCORP (Exact name of Registrant as Specified in Its Charter) Massachusetts (State or Other Jurisdiction of Incorporation) 001-38184 (Commission File Numb

November 13, 2019 EX-99.1

Investor Presentation November 13, 2019 NASDAQ: CATC Parent of Cambridge Trust Company EX-99.1

Investor Presentation November 13, 2019 NASDAQ: CATC Parent of Cambridge Trust Company EX-99.

November 7, 2019 10-Q

November 7, 2019

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 10-Q (Mark One) ☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended September 30, 2019 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: 001-38184 CAMBRIDGE BANCORP (Exact Name of Registrant as Specified in its Charter) Massachusetts 04-2777442 (State or other jurisdiction of incorporation or organization) (I.

October 31, 2019 CORRESP

CATC / Cambridge Bancorp CORRESP - -

CORRESP 1 filename1.htm CAMBRIDGE BANCORP 1336 Massachusetts Avenue Cambridge, MA 02138 October 31, 2019 VIA EDGAR Securities & Exchange Commission 100 F Street, N.E. Washington, D.C. 20549 Attn: David Gesserts Re:Cambridge Bancorp Registration Statement on Form S-3 (File No. 333-234286) Request for Acceleration of Effective Date Dear Mr. Gesserts: Pursuant to Rule 461 of the General Rules and Reg

October 22, 2019 S-3

CATC / Cambridge Bancorp S-3 - - S-3

As filed with the Securities and Exchange Commission on October 22, 2019 Registration No.

October 22, 2019 EX-4.9

Form of Subordinated Debt Indenture.

Exhibit 4.9 Cambridge Bancorp as Issuer and [ ] as Trustee FORM OF INDENTURE Dated as of [ ] Subordinated Debt Securities CERTAIN SECTIONS OF THIS INDENTURE RELATING TO SECTIONS 310 THROUGH 318 INCLUSIVE, OF THE TRUST INDENTURE ACT OF 1939 Trust Indenture Act Section INDENTURE Section Section 310(a)(1) Section 609 (a)(2) Section 609 (a)(3) Not Applicable (a)(4) Not Applicable (b) Section 608 Secti

October 22, 2019 EX-4.8

Form of Senior Debt Indenture.

Exhibit 4.8 Cambridge Bancorp as Issuer and [ ] as Trustee FORM OF INDENTURE Dated as of [ ] Senior Debt Securities CERTAIN SECTIONS OF THIS INDENTURE RELATING TO SECTIONS 310 THROUGH 318 INCLUSIVE, OF THE TRUST INDENTURE ACT OF 1939 Trust Indenture Act Section INDENTURE Section Section 310(a)(1) Section 609 (a)(2) Section 609 (a)(3) Not Applicable (a)(4) Not Applicable (b) Section 608 Section 610

October 22, 2019 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, 2019 CAMBRIDGE BANCORP (Exact name of Registrant as Specified in Its Charter) Massachusetts (State or Other Jurisdiction of Incorporation) 001-38184 (Commission File Numbe

October 22, 2019 EX-99.1

Cambridge Bancorp Announces Record Third Quarter 2019 Earnings and Declares Dividend

Ex. 99.1 FOR IMMEDIATE RELEASE Cambridge Bancorp Announces Record Third Quarter 2019 Earnings and Declares Dividend CAMBRIDGE, MA. (October 22, 2019) - Cambridge Bancorp (NASDAQ: CATC) (the “Company”), the parent of Cambridge Trust Company, today announced unaudited net income of $7,676,000 for the quarter ended September 30, 2019, an increase of $1,017,000, or 15.3%, compared to net income of $6,

October 22, 2019 EX-99.2

OPTIMA BANK & TRUST COMPANY Unaudited Interim Condensed Financial Statements

Ex: 99.2 OPTIMA BANK & TRUST COMPANY Unaudited Interim Condensed Financial Statements Table of Contents OPTIMA BANK & TRUST COMPANY Unaudited Interim Condensed Financial Statements Table of Contents Page Balance Sheets – March 31, 2019 (Unaudited) and December 31, 2018 3 Statements of Income (Unaudited) for the three month periods ended March 31, 2019 and 2018 4 Statements of Comprehensive Income

October 22, 2019 8-K

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): October 22, 2019 CAMBRIDGE BANCORP (Exact name of Registrant as Specified in Its Charter) Massachusetts (State or Other Jurisdiction of Incorporation) 001-38184 (Commission File Numbe

October 22, 2019 EX-99.1

Optima Bank & Trust Company Audited Financial Statements Years Ended December 31, 2018 and 2017 With Independent Auditors’ Report INDEPENDENT AUDITORS’ REPORT

Ex: 99.1 Optima Bank & Trust Company Audited Financial Statements Years Ended December 31, 2018 and 2017 With Independent Auditors’ Report INDEPENDENT AUDITORS’ REPORT To the Board of Directors Optima Bank & Trust Company Report on the Financial Statements We have audited the accompanying financial statements of Optima Bank & Trust Company (the Bank), which comprise the balance sheets as of Decemb

October 22, 2019 EX-99.3

UNAUDITED PRO FORMA CONDENSED COMBINED FINANCIAL STATEMENTS

Ex: 99.3 UNAUDITED PRO FORMA CONDENSED COMBINED FINANCIAL STATEMENTS On April 17, 2019, Cambridge Bancorp (NASDAQ: CATC) (“Cambridge”), completed its previously announced acquisition of Optima Bank & Trust Company (“Optima”), pursuant to an Agreement and Plan of Merger, dated as of December 5, 2018 (the “Merger Agreement”), by and between Cambridge, Cambridge Trust Company and Optima. Under the te

August 8, 2019 10-Q

August 8, 2019

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 10-Q (Mark One) ☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended June 30, 2019 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: 001-38184 CAMBRIDGE BANCORP (Exact Name of Registrant as Specified in its Charter) Massachusetts 04-2777442 (State or other jurisdiction of incorporation or organization) (I.

July 30, 2019 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): July 30, 2019 CAMBRIDGE BANCORP (Exact name of Registrant as Specified in Its Charter) Massachusetts (State or Other Jurisdiction of Incorporation) 001-38184 (Commission File Number)

July 30, 2019 EX-99.1

Investor Presentation July 30th, 2019 NASDAQ: CATC Parent of Cambridge Trust Company Ex. 99.1

Investor Presentation July 30th, 2019 NASDAQ: CATC Parent of Cambridge Trust Company Ex.

July 16, 2019 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 16, 2019 CAMBRIDGE BANCORP (Exact name of Registrant as Specified in Its Charter) Massachusetts (State or Other Jurisdiction of Incorporation) 001-38184 (Commission File Number)

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