NBTB / NBT Bancorp Inc. - Документы SEC, Годовой отчет, Доверенное заявление

НБТ Банкорп Инк.
US ˙ NasdaqGS ˙ US6287781024

Основная статистика
LEI 5493009BOQDC6PCFR785
CIK 790359
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 NBT Bancorp Inc.
SEC Filings (Chronological Order)
На этой странице представлен полный хронологический список документов SEC, за исключением документов о собственности, которые мы предоставляем в других местах.
August 29, 2025 8-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): August 29, 2025 NBT BANCORP INC.

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): August 29, 2025 NBT BANCORP INC. (Exact name of registrant as specified in its charter) Delaware 000-14703 16-1268674 (State or other jurisdiction of incorporation or organization) (C

August 8, 2025 10-Q

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

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 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, 2025. OR ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to . COMMISSION FILE NUMBER 0-14703 NBT BANCOR

July 28, 2025 EX-99.1

NBT BANCORP INC. ANNOUNCES SECOND QUARTER 2025 NET INCOME AND APPROVES AN 8.8% CASH DIVIDEND INCREASE

Exhibit 99.1 FOR IMMEDIATE RELEASE ATTENTION: FINANCIAL AND BUSINESS EDITORS Contact: Scott A. Kingsley, President and CEO Annette L. Burns, Executive Vice President and CFO NBT Bancorp Inc. 52 South Broad Street Norwich, NY 13815 607-337-6589 NBT BANCORP INC. ANNOUNCES SECOND QUARTER 2025 NET INCOME AND APPROVES AN 8.8% CASH DIVIDEND INCREASE NORWICH, NY (July 28, 2025) – NBT Bancorp Inc. (“NBT”

July 28, 2025 8-K

Financial Statements and Exhibits, Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): July 28, 2025 NBT BANCORP INC. (Exact name of registrant as specified in its charter) Delaware 000-14703 16-1268674 (State or other jurisdiction of incorporation or organization) (Com

June 26, 2025 11-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 11-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 11-K (Mark One): ☒ ANNUAL REPORT PURSUANT TO SECTION 15 (d) OF THE SECURITIES EXCHANGE ACT OF 1934. For the fiscal year ended December 31, 2024 OR ☐ TRANSITION REPORT PURSUANT TO SECTION 15 (d) OF THE SECURITIES EXCHANGE ACT OF 1934. For the transition period from to . Commission File No. 0-14703 A. Full title of the plan

May 20, 2025 EX-99.1

NBT BANCORP INC. ANNOUNCES CASH DIVIDEND

Exhibit 99.1 FOR IMMEDIATE RELEASE ATTENTION: FINANCIAL AND BUSINESS EDITORS Contact: Scott A. Kingsley President and CEO Annette L. Burns, Executive Vice President and CFO NBT Bancorp Inc. 52 South Broad Street Norwich, NY 13815 607-337-6589 NBT BANCORP INC. ANNOUNCES CASH DIVIDEND NORWICH, NY (May 20, 2025) – The Board of Directors of NBT Bancorp Inc. (“NBT” or the “Company”) (NASDAQ: NBTB) appr

May 20, 2025 8-K

Regulation FD Disclosure, Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers, Financial Statements and Exhibits, Other Events, 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 20, 2025 NBT BANCORP INC. (Exact name of registrant as specified in its charter) Delaware 000-14703 16-1268674 (State or other jurisdiction of incorporation or organization) (Comm

May 19, 2025 8-K

Regulation FD Disclosure

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 19, 2025 NBT BANCORP INC (Exact name of registrant as specified in its charter) Delaware 000-14703 16-1268674 (State or other jurisdiction of incorporation or organization) (Commi

May 14, 2025 8-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): May 14, 2025 NBT BANCORP INC. (Ex

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 14, 2025 NBT BANCORP INC. (Exact name of registrant as specified in its charter) Delaware 000-14703 16-1268674 (State or other jurisdiction of incorporation or organization) (Comm

May 9, 2025 10-Q

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

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 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, 2025. OR ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to . COMMISSION FILE NUMBER 0-14703 NBT BANCO

May 5, 2025 8-K

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): May 2, 2025 NBT BANCORP INC. (Exact name of registrant as specified in its charter) Delaware 000-14703 16-1268674 (State or other jurisdiction of incorporation) (Commission File Numbe

May 5, 2025 EX-99.1

NBT BANCORP INC. COMPLETES MERGER WITH EVANS BANCORP, INC.

Exhibit 99.1 FOR IMMEDIATE RELEASE ATTENTION: FINANCIAL AND BUSINESS EDITORS Contact: Scott A. Kingsley, President and CEO Annette L. Burns, Executive Vice President and CFO NBT Bancorp Inc. 52 South Broad Street Norwich, NY 13815 607-337-6589 NBT BANCORP INC. COMPLETES MERGER WITH EVANS BANCORP, INC. NORWICH, NY (May 5, 2025) (GLOBE NEWSWIRE) – NBT Bancorp Inc. (“NBT” or the “Company”) (NASDAQ: N

April 24, 2025 8-K

Financial Statements and Exhibits, Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): April 24, 2025 NBT BANCORP INC. (Exact name of registrant as specified in its charter) Delaware 000-14703 16-1268674 (State or other jurisdiction of incorporation or organization) (Co

April 24, 2025 EX-99.1

NBT BANCORP INC. ANNOUNCES FIRST QUARTER 2025 NET INCOME

Exhibit 99.1 FOR IMMEDIATE RELEASE ATTENTION: FINANCIAL AND BUSINESS EDITORS Contact: Scott A. Kingsley, President and CEO Annette L. Burns, Executive Vice President and CFO NBT Bancorp Inc. 52 South Broad Street Norwich, NY 13815 607-337-6589 NBT BANCORP INC. ANNOUNCES FIRST QUARTER 2025 NET INCOME NORWICH, NY (April 24, 2025) – NBT Bancorp Inc. (“NBT” or the “Company”) (NASDAQ: NBTB) reported ne

April 7, 2025 DEF 14A

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 Registrant ☑ Filed by Party other than the Registrant  ☐ Check the appropriate box:  ☐ Preliminary Proxy Statement  ☐ Confidential, for Use of the Commission Only (as permitted by Rule 14a-

April 7, 2025 DEFA14A

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

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

March 24, 2025 8-K

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

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): March 24, 2025 NBT BANCORP INC. (Exact name of registrant as specified in its charter) Delaware 000-14703 16-1268674 (State or other jurisdiction of incorporation or organization) (Co

March 24, 2025 EX-10.1

Amendment to NBT Bancorp Inc. Supplemental Executive Retirement Plan Supplemental Retirement Agreement for Scott A. Kingsley, dated March 24, 2025, between NBT Bancorp Inc. and Scott A. Kingsley

Exhibit 10.1 Amendment to NBT Bancorp Inc. Supplemental Executive Retirement Plan Supplemental Retirement Agreement for Scott A. Kingsley The NBT Bancorp Inc. Supplemental Executive Retirement Plan, effective as of December 19, 2016, with respect to the supplemental retirement agreement between NBT Bancorp Inc. and Scott A. Kingsley, effective as of May 21, 2024, is amended by the parties effectiv

February 28, 2025 EX-19

NBT Bancorp Inc. Policy Regarding Trading in Securities and Protection of Confidential Information

Exhibit 19 NBT Bancorp Inc. Policy Regarding Trading In Securities and Protection of Confidential Information The following Policy sets forth policies regarding trading in securities and protection of confidential information by all personnel of NBT Bancorp Inc. (“NBT Bancorp”) and its divisions and subsidiaries (collectively, “NBT”). As described in more detail in this Policy, this Policy general

February 28, 2025 EX-21

A list of the subsidiaries of the Registrant.

EXHIBIT 21 List of Subsidiaries of the Registrant Jurisdiction of Incorporation Names Under Which Subsidiary does Business NBT Bancorp Inc.

February 28, 2025 10-K

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

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, 2024 OR ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 FOR THE TRANSITION PERIOD FROM TO .

February 12, 2025 8-K

Regulation FD Disclosure

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 12, 2025 NBT BANCORP INC. (Exact name of registrant as specified in its charter) Delaware 000-14703 16-1268674 (State or other jurisdiction of incorporation or organization)

January 27, 2025 EX-99.1

NBT BANCORP INC. ANNOUNCES FULL YEAR NET INCOME AND DECLARES CASH DIVIDEND

Exhibit 99.1 FOR IMMEDIATE RELEASE ATTENTION: FINANCIAL AND BUSINESS EDITORS Contact: Scott A. Kingsley, President and CEO Annette L. Burns, Executive Vice President and CFO NBT Bancorp Inc. 52 South Broad Street Norwich, NY 13815 607-337-6589 NBT BANCORP INC. ANNOUNCES FULL YEAR NET INCOME AND DECLARES CASH DIVIDEND NORWICH, NY (January 27, 2025) – NBT Bancorp Inc. (“NBT” or the “Company”) (NASDA

January 27, 2025 8-K

Financial Statements and Exhibits, Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): January 27, 2025 NBT BANCORP INC. (Exact name of registrant as specified in its charter) Delaware 000-14703 16-1268674 (State or other jurisdiction of incorporation or organization) (

December 20, 2024 EX-99.1

NBT Bancorp Inc. Receives Regulatory Approval, Evans Bancorp, Inc. Shareholders Approve Merger

Exhibit 99.1 FOR IMMEDIATE RELEASE NBT Bancorp Inc. Receives Regulatory Approval, Evans Bancorp, Inc. Shareholders Approve Merger NORWICH, NY AND WILLIAMSVILLE, NY (December 20, 2024) – NBT Bancorp Inc. (“NBT”) (NASDAQ: NBTB) announced that it has received regulatory approval to complete the proposed merger (the “Merger”) of Evans Bancorp, Inc. (“Evans”) (NYSE American: EVBN) with and into NBT and

December 20, 2024 8-K

Financial Statements and Exhibits, Other Events

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): December 20, 2024 NBT BANCORP INC. (Exact name of Registrant as Specified in Its Charter) Delaware 000-14703 16-1268674 (State or Other Jurisdiction of Incorporation) (Commission File

December 13, 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): December 13, 2024 NBT BANCORP INC. (Exact name of Registrant as Specified in Its Charter) Delaware 000-14703 16-1268674 (State or Other Jurisdiction of Incorporation) (Commission File

December 13, 2024 425

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): December 13, 2024 NBT BANCORP INC

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November 12, 2024 8-K

Regulation FD Disclosure

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 12, 2024 NBT BANCORP INC. (Exact name of registrant as specified in its charter) Delaware 000-14703 16-1268674 (State or other jurisdiction of incorporation or organization)

November 8, 2024 10-Q

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

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 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, 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 0-14703 NBT B

November 7, 2024 424B3

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

TABLE OF CONTENTS Filed Pursuant to Rule 424(b)(3) Registration No. 333-282822 PROSPECTUS   Proxy Statement/Prospectus MERGER PROPOSED—YOUR VOTE IS VERY IMPORTANT Dear Shareholder: On September 9, 2024, NBT Bancorp Inc., a Delaware corporation (“NBT”), NBT’s wholly-owned subsidiary, NBT Bank, National Association (“NBT Bank”), Evans Bancorp, Inc., a New York corporation (“Evans”) and Evans’s wholl

November 5, 2024 EX-99.3

EX-99.3

Exhibit 99.3

November 5, 2024 S-4/A

As filed with the Securities and Exchange Commission on November 5, 2024

TABLE OF CONTENTS As filed with the Securities and Exchange Commission on November 5, 2024 Registration No.

November 5, 2024 CORRESP

NBT Bancorp Inc. 52 South Broad Street Norwich, New York 13815

NBT Bancorp Inc. 52 South Broad Street Norwich, New York 13815 November 5, 2024 VIA EDGAR U.S. Securities and Exchange Commission Division of Corporation Finance Office of Industrial Applications and Services 100 F Street, N.E. Washington, D.C. 20549 Re: NBT Bancorp Inc. Registration Statement on Form S-4 (File No. 333-282822) Request for Acceleration of Effective Date Dear Ms. Adegbuyi: Pursuant

October 28, 2024 EX-99.1

NBT BANCORP INC. ANNOUNCES THIRD QUARTER 2024 RESULTS AND DECLARES CASH DIVIDEND

Exhibit 99.1 FOR IMMEDIATE RELEASE ATTENTION: FINANCIAL AND BUSINESS EDITORS Contact: Scott A. Kingsley, President and CEO Annette L. Burns, Executive Vice President and CFO NBT Bancorp Inc. 52 South Broad Street Norwich, NY 13815 607-337-6589 NBT BANCORP INC. ANNOUNCES THIRD QUARTER 2024 RESULTS AND DECLARES CASH DIVIDEND NORWICH, NY (October 28, 2024) – NBT Bancorp Inc. (“NBT” or the “Company”)

October 28, 2024 8-K

Financial Statements and Exhibits, Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): October 28, 2024 NBT BANCORP INC. (Exact name of registrant as specified in its charter) Delaware 000-14703 16-1268674 (State or other jurisdiction of incorporation or organization) (

October 24, 2024 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 NBT Bancorp Inc. (“NBT”) pursuant to the terms of the Agreement and Plan of Merger by and among NBT, NBT Bank, National Association, Evans Bancorp, Inc., and Evans Bank, National Association, date

October 24, 2024 EX-99.3

EX-99.3

Exhibit 99.3

October 24, 2024 EX-99.1

CONSENT OF PIPER SANDLER & CO.

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 1885. 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 Evans Bancorp, Inc. (the “Company”) as an Annex to the Proxy Statement/Prospectus relating to the proposed merger of the Compa

October 24, 2024 S-4

As filed with the Securities and Exchange Commission on October 24, 2024

TABLE OF CONTENTS As filed with the Securities and Exchange Commission on October 24, 2024 Registration No.

October 24, 2024 EX-FILING FEES

Table 1: Newly Registered and Carry Forward Securities

Calculation of Filing Fee Tables S-4 NBT BANCORP INC Table 1: Newly Registered and Carry Forward Securities Security Type Security Class Title Fee Calculation or Carry Forward Rule Amount Registered Proposed Maximum Offering Price Per Unit Maximum Aggregate Offering Price Fee Rate Amount of Registration Fee Carry Forward Form Type Carry Forward File Number Carry Forward Initial Effective Date Filing Fee Previously Paid in Connection with Unsold Securities to be Carried Forward Newly Registered Securities Fees to be Paid 1 Equity Common Stock, par value $0.

October 24, 2024 EX-10.1

VOTING AGREEMENT

Exhibit 10.1 VOTING AGREEMENT This VOTING AGREEMENT (this “Agreement”) is dated as of September 9, 2024, by and between [] (the “Shareholder”) and NBT Bancorp Inc., a Delaware corporation (“NBT”). All terms used herein and not defined herein shall have the meanings assigned thereto in the Merger Agreement (as defined below). WHEREAS, concurrently with the execution of this Agreement, NBT, NBT Bank

September 11, 2024 425

Filed by NBT Bancorp Inc.

Filed by NBT Bancorp Inc. (Commission File No. 000-14703) 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: Evans Bancorp, Inc. (Commission File No. 001-35021) The following is a transcript of a call hosted by NBT Bancorp Inc. (“NBT” ) on September 10, 2024. CORPORATE PARTICIPANTS • Scott Kingsl

September 10, 2024 425

Filed by NBT Bancorp Inc.

Filed by NBT Bancorp Inc. (Commission File No. 000-14703) 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: Evans Bancorp, Inc. (Commission File No. 001-35021) In connection with the pending transaction among NBT Bancorp Inc. (“NBT”), NBT Bank, National Association, Evans Bancorp, Inc. and Evans

September 9, 2024 EX-2.1

AGREEMENT AND PLAN OF MERGER DATED AS OF SEPTEMBER 9, 2024 BY AND AMONG NBT BANCORP INC., NBT BANK, NATIONAL ASSOCIATION, EVANS BANCORP, INC. EVANS BANK, NATIONAL ASSOCIATION TABLE OF CONTENTS

Exhibit 2.1 AGREEMENT AND PLAN OF MERGER DATED AS OF SEPTEMBER 9, 2024 BY AND AMONG NBT BANCORP INC., NBT BANK, NATIONAL ASSOCIATION, EVANS BANCORP, INC. AND EVANS BANK, NATIONAL ASSOCIATION TABLE OF CONTENTS Page ARTICLE I THE MERGER 1 Section 1.01 Terms of the Merger 1 Section 1.02 Tax Consequences 2 Section 1.03 Name of the Surviving Corporation and the Surviving Bank 2 Section 1.04 Certificate

September 9, 2024 EX-99.1

NBT Bancorp Inc. and Evans Bancorp, Inc. Announce Strategic Partnership Merger Will Extend NBT’s Growing Footprint to Western New York, Bring Next Generation of Community Banking Into Region

Exhibit 99.1 FOR IMMEDIATE RELEASE NBT Bancorp Inc. and Evans Bancorp, Inc. Announce Strategic Partnership Merger Will Extend NBT’s Growing Footprint to Western New York, Bring Next Generation of Community Banking Into Region NORWICH, NY AND WILLIAMSVILLE, NY (September 9, 2024) – NBT Bancorp Inc. (“NBT”) (NASDAQ: NBTB) and Evans Bancorp, Inc. (“Evans”) (NYSE American: EVBN) today announced they h

September 9, 2024 EX-99.1

NBT Bancorp Inc. and Evans Bancorp, Inc. Announce Strategic Partnership Merger Will Extend NBT’s Growing Footprint to Western New York, Bring Next Generation of Community Banking Into Region

Exhibit 99.1 FOR IMMEDIATE RELEASE NBT Bancorp Inc. and Evans Bancorp, Inc. Announce Strategic Partnership Merger Will Extend NBT’s Growing Footprint to Western New York, Bring Next Generation of Community Banking Into Region NORWICH, NY AND WILLIAMSVILLE, NY (September 9, 2024) – NBT Bancorp Inc. (“NBT”) (NASDAQ: NBTB) and Evans Bancorp, Inc. (“Evans”) (NYSE American: EVBN) today announced they h

September 9, 2024 425

A Strategic Partnership for GrowthSeptember 9, 2024 Forward-Looking Statements This communication contains forward-looking statements as defined in the Private Securities Litigation Reform Act of 1995. Such forward-looking statements about NBT Bancor

Filed by NBT Bancorp Inc. (Commission File No. 000-14703) 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: Evans Bancorp, Inc. (Commission File No. 001-35021) A Strategic Partnership for GrowthSeptember 9, 2024 Forward-Looking Statements This communication contains forward-looking statements as

September 9, 2024 8-K

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 9, 2024 NBT BANCORP INC. (Exact name of Registrant as Specified in Its Charter) Delaware 000-14703 16-1268674 (State or Other Jurisdiction of Incorporation) (Commission File

September 9, 2024 425

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): September 9, 2024 NBT BANCORP INC

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September 9, 2024 EX-2.1

Agreement and Plan of Merger, dated as of September 9, 2024, by and among NBT Bancorp Inc., NBT Bank, National Association, Evans Bancorp, Inc. and Evans Bank, National Association

Exhibit 2.1 AGREEMENT AND PLAN OF MERGER DATED AS OF SEPTEMBER 9, 2024 BY AND AMONG NBT BANCORP INC., NBT BANK, NATIONAL ASSOCIATION, EVANS BANCORP, INC. AND EVANS BANK, NATIONAL ASSOCIATION TABLE OF CONTENTS Page ARTICLE I THE MERGER 1 Section 1.01 Terms of the Merger 1 Section 1.02 Tax Consequences 2 Section 1.03 Name of the Surviving Corporation and the Surviving Bank 2 Section 1.04 Certificate

September 3, 2024 8-K

Regulation FD Disclosure

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 3, 2024 NBT BANCORP INC. (Exact name of registrant as specified in its charter) Delaware 000-14703 16-1268674 (State or other jurisdiction of incorporation or organization)

August 9, 2024 10-Q

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

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 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, 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 0-14703 NBT BANCOR

July 22, 2024 EX-99.1

NBT BANCORP INC. ANNOUNCES SECOND QUARTER 2024 RESULTS AND APPROVES A 6.3% CASH DIVIDEND INCREASE

Exhibit 99.1 FOR IMMEDIATE RELEASE ATTENTION: FINANCIAL AND BUSINESS EDITORS Contact: Scott A. Kingsley, President and CEO Annette L. Burns, Executive Vice President and CFO NBT Bancorp Inc. 52 South Broad Street Norwich, NY 13815 607-337-6589 NBT BANCORP INC. ANNOUNCES SECOND QUARTER 2024 RESULTS AND APPROVES A 6.3% CASH DIVIDEND INCREASE NORWICH, NY (July 22, 2024) – NBT Bancorp Inc. (“NBT” or t

July 22, 2024 8-K

Financial Statements and Exhibits, Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): July 22, 2024 NBT BANCORP INC. (Exact name of registrant as specified in its charter) Delaware 000-14703 16-1268674 (State or other jurisdiction of incorporation or organization) (Com

June 28, 2024 11-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 11-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 11-K (Mark One): ☒ ANNUAL REPORT PURSUANT TO SECTION 15 (d) OF THE SECURITIES EXCHANGE ACT OF 1934. For the fiscal year ended December 31, 2023 OR ☐ TRANSITION REPORT PURSUANT TO SECTION 15 (d) OF THE SECURITIES EXCHANGE ACT OF 1934. For the transition period from to . Commission File No. 0-14703 A. Full title of the plan

May 22, 2024 EX-10.6

Amendment to NBT Bancorp Inc. Supplemental Executive Retirement Plan and Supplemental Retirement Agreement for John H. Watt, Jr., dated May 21, 2024, between NBT Bancorp Inc. and John H. Watt, Jr.

Exhibit 10.6 Amendment to NBT Bancorp Inc. Supplemental Executive Retirement Plan and Supplemental Retirement Agreement for John H. Watt, Jr. The NBT Bancorp Inc. Supplemental Executive Retirement Plan, effective as of December 19, 2016, and the supplemental retirement agreement between NBT Bancorp Inc. and John H. Watt, Jr., are amended by the parties as follows: Section 4.2 of the Supplemental E

May 22, 2024 EX-10.5

First Amendment to Split-Dollar Agreement, dated May 21, 2024, by and among NBT Bancorp Inc., NBT Bank, N.A. and John H. Watt, Jr

Exhibit 10.5 FIRST AMENDMENT TO SPLIT-DOLLAR AGREEMENT This First Amendment (this “Amendment”) is entered into as of May 21, 2024, by and among NBT Bancorp, Inc., NBT Bank, N.A., and John H. Watt, Jr. in order to amend as follows that certain Split-Dollar Agreement, entered into as of May 9, 2017 (the “Split-Dollar Agreement”), by and among NBT Bancorp, Inc., NBT Bank, N.A., and John H. Watt, Jr.

May 22, 2024 EX-10.4

Employment Agreement, dated May 21, 2024, by and between Joseph R. Stagliano and NBT Bancorp Inc.

Exhibit 10.4 EMPLOYMENT AGREEMENT This EMPLOYMENT AGREEMENT (the “Agreement”) is made and entered into as of May 21, 2024, by and between JOSEPH R. STAGLIANO (“Executive”) and NBT BANCORP INC., a Delaware corporation having its principal office in Norwich, New York (“NBTB”). W I T N E S S E T H : WHEREAS, NBTB and NBT Bank, National Association, a national banking association which is a wholly-own

May 22, 2024 EX-99.2

NBT BANCORP INC. ANNOUNCES CASH DIVIDEND

Exhibit 99.2 FOR IMMEDIATE RELEASE ATTENTION: FINANCIAL AND BUSINESS EDITORS Contact: Scott A. Kingsley President and CEO Annette L. Burns, Executive Vice President and CFO NBT Bancorp Inc. 52 South Broad Street Norwich, NY 13815 607-337-6589 NBT BANCORP INC. ANNOUNCES CASH DIVIDEND NORWICH, NY (May 21, 2024) – The Board of Directors of NBT Bancorp Inc. (“NBT” or the “Company”) (NASDAQ: NBTB) appr

May 22, 2024 EX-10.1

Employment Agreement, dated May 21, 2024 by and between NBT Bancorp Inc. and Scott A. Kingsley

Exhibit 10.1 EMPLOYMENT AGREEMENT This EMPLOYMENT AGREEMENT (the “Agreement”) is made and entered into as of May 21, 2024, by and between SCOTT A. KINGSLEY (“Executive”) and NBT BANCORP INC., a Delaware corporation having its principal office in Norwich, New York (“NBTB”). W I T N E S S E T H : WHEREAS, NBTB and NBT Bank, National Association, a national banking association which is a wholly-owned

May 22, 2024 EX-99.1

NBT BANCORP INC. COMPLETES LEADERSHIP TRANSITION Kingsley, Stagliano, Burns and Hyle Promoted

EXHIBIT 99.1 FOR IMMEDIATE RELEASE ATTENTION: FINANCIAL AND BUSINESS EDITORS NBT BANCORP INC. COMPLETES LEADERSHIP TRANSITION Kingsley, Stagliano, Burns and Hyle Promoted NORWICH, NY (May 21, 2024) – NBT Bancorp Inc. (“NBT” or the “Company”) (NASDAQ: NBTB) announced that its CEO Succession Plan unanimously approved by NBT’s Board of Directors in January was executed today with Scott A. Kingsley su

May 22, 2024 EX-10.2

Supplemental Retirement Agreement, dated May 21, 2014 by and between Scott A. Kingsley and NBT Bancorp Inc.

Exhibit 10.2 SUPPLEMENTAL RETIREMENT AGREEMENT EFFECTIVE MAY 21, 2024 The attached document (NBT Bancorp Inc. Supplemental Executive Retirement Plan, effective as of May 21, 2024) sets forth the terms of an agreement for the payment of supplemental retirement income made as of May 21, 2024 between NBT Bancorp Inc., a Delaware corporation and a registered financial holding company headquartered at

May 22, 2024 EX-10.3

Employment Agreement, dated May 21, 2024, by and between Annette L. Burns and NBT Bancorp Inc.

Exhibit 10.3 EMPLOYMENT AGREEMENT This EMPLOYMENT AGREEMENT (the “Agreement”) is made and entered into as of May 21, 2024, by and between ANNETTE L. BURNS (“Executive”) and NBT BANCORP INC., a Delaware corporation having its principal office in Norwich, New York (“NBTB”). W I T N E S S E T H : WHEREAS, NBTB and NBT Bank, National Association, a national banking association which is a wholly-owned

May 22, 2024 8-K

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

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): May 21, 2024 NBT BANCORP INC. (Exact name of registrant as specified in its charter) Delaware 000-14703 16-1268674 (State or other jurisdiction of incorporation or organization) (Comm

May 21, 2024 S-8

As filed with the Securities and Exchange Commission on May 21, 2024

As filed with the Securities and Exchange Commission on May 21, 2024 Registration No.

May 21, 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): May 21, 2024 NBT BANCORP INC. (Ex

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 21, 2024 NBT BANCORP INC. (Exact name of registrant as specified in its charter) Delaware 000-14703 16-1268674 (State or other jurisdiction of incorporation or organization) (Comm

May 21, 2024 EX-10.1

NBT Bancorp Inc. 2024 Omnibus Incentive Plan

Exhibit 10.1 NBT BANCORP INC. 2024 OMNIBUS INCENTIVE PLAN TABLE OF CONTENTS Page 1. PURPOSE 1 2. DEFINITIONS 1 3. ADMINISTRATION OF THE PLAN 6 3.1 Committee. 6 3.2 Board. 7 3.3 Terms of Awards. 7 3.4 No Repricing Without Stockholder Approval. 9 3.5 Deferral Arrangement. 9 3.6 No Liability. 9 3.7 Share Issuance/Book-Entry. 9 4. STOCK SUBJECT TO THE PLAN 10 4.1 Number of Shares Available for Awards.

May 21, 2024 EX-10.2

Form of Restricted Stock Unit Award Agreement

Exhibit 10.2 NBT BANCORP INC. 2024 OMNIBUS INCENTIVE PLAN LONG-TERM INCENTIVE PROGRAM RESTRICTED STOCK UNIT AWARD AGREEMENT (TRSU AND PRSU) Cover Sheet NBT Bancorp Inc., a Delaware corporation (the “Company”), hereby grants time-based vesting Stock Units (“TRSUs”) and performance-based vesting Stock Units (“PRSUs” and together with the TRSUs, the “Award Units”) relating to shares of the Company’s

May 21, 2024 EX-FILING FEES

Calculation of Filing Fee Tables Form S-8 (Form Type) NBT Bancorp Inc. (Exact Name of Registrant as Specified in its Charter) Table 1: Newly Registered Securities

Exhibit 107 Calculation of Filing Fee Tables Form S-8 (Form Type) NBT Bancorp Inc.

May 20, 2024 8-K

Regulation FD Disclosure

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 20, 2024 NBT BANCORP INC. (Exact name of registrant as specified in its charter) Delaware 000-14703 16-1268674 (State or other jurisdiction of incorporation or organization) (Comm

May 9, 2024 10-Q

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

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 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 0-14703 NBT BANCO

May 8, 2024 8-K

Regulation FD Disclosure

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): May 8, 2024 NBT BANCORP INC. (Exact name of registrant as specified in its charter) Delaware (State or other jurisdiction of incorporation or organization) 000-14703 (Commission File

April 22, 2024 8-K

Financial Statements and Exhibits, Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): April 22, 2024 NBT BANCORP INC. (Exact name of registrant as specified in its charter) Delaware 000-14703 16-1268674 (State or other jurisdiction of incorporation or organization) (Co

April 22, 2024 EX-99.1

NBT BANCORP INC. ANNOUNCES FIRST QUARTER 2024 RESULTS

Exhibit 99.1 FOR IMMEDIATE RELEASE ATTENTION: FINANCIAL AND BUSINESS EDITORS Contact: John H. Watt, Jr., President and CEO Scott A. Kingsley, Executive Vice President and CFO NBT Bancorp Inc. 52 South Broad Street Norwich, NY 13815 607-337-6589 NBT BANCORP INC. ANNOUNCES FIRST QUARTER 2024 RESULTS NORWICH, NY (April 22, 2024) – NBT Bancorp Inc. (“NBT” or the “Company”) (NASDAQ: NBTB) reported net

April 5, 2024 DEFA14A

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

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

April 5, 2024 DEF 14A

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 Registrant ☑ Filed by Party other than the Registrant  ☐ Check the appropriate box:  ☐ Preliminary Proxy Statement  ☐ Confidential, for Use of the Commission Only (as permitted by Rule 14a-

March 26, 2024 EX-FILING FEES

Calculation of Filing Fee Tables Form S-3 (Form Type) NBT Bancorp Inc. (Exact Name of Registrant as Specified in its Charter) Table 1: Newly Registered and Carry Forward Securities

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

March 26, 2024 S-3ASR

As filed with the Securities and Exchange Commission on March 26, 2024

TABLE OF CONTENTS As filed with the Securities and Exchange Commission on March 26, 2024 Registration No.

March 26, 2024 EX-25.2

securities and exchange commission Washington, D.C. 20549 FORM T-1 Statement of Eligibility Under The Trust Indenture Act of 1939 of a Corporation Designated to Act as Trustee Check if an Application to Determine Eligibility of a Trustee Pursuant to

Exhibit 25.2 securities and exchange commission Washington, D.C. 20549 FORM T-1 Statement of Eligibility Under The Trust Indenture Act of 1939 of a Corporation Designated to Act as Trustee Check if an Application to Determine Eligibility of a Trustee Pursuant to Section 305(b)(2) ☐ U.S. BANK TRUST COMPANY, NATIONAL ASSOCIATION (Exact name of Trustee as specified in its charter) 91-1821036 I.R.S. E

March 1, 2024 8-K

Regulation FD Disclosure

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 1, 2024 NBT BANCORP INC. (Exact name of registrant as specified in its charter) Delaware 000-14703 16-1268674 (State or other jurisdiction of incorporation or organization) (Com

February 29, 2024 10-K

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

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, 2023 OR ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 FOR THE TRANSITION PERIOD FROM TO .

February 29, 2024 EX-21

Jurisdiction of

EXHIBIT 21 List of Subsidiaries of the Registrant Jurisdiction of Incorporation Names Under Which Subsidiary does Business NBT Bancorp Inc.

February 29, 2024 EX-97

Incentive Compensation Recovery Policy

EXHIBIT 97 NBT Bancorp Inc. Incentive Compensation Recovery Policy The Compensation Committee (the “Committee”) of the Board of Directors of NBT Bancorp Inc. (the “Company”) is adopting this Incentive Compensation Recovery Policy (this “Policy”) to provide for the recovery of certain Incentive Compensation in the event of an Accounting Restatement. Statement of Policy In the event that the Company

February 29, 2024 EX-10.18

Employment Agreement, dated August 11, 2023 by and between NBT Bank, National Association and Richard J. Cantele, Jr.*

Exhibit 10.18 EMPLOYMENT AGREEMENT This EMPLOYMENT AGREEMENT (the “Agreement”) is made and entered into as of August 11, 2023, by and between RICHARD J. CANTELE, JR. (“Executive”) and NBT BANK, NATIONAL ASSOCIATION, a national banking association having its principal office in Norwich, New York (“NBT Bank” or the “Company”). W I T N E S S E T H : WHEREAS, NBT Bank and its parent corporation, NBT B

February 13, 2024 SC 13G/A

NBTB / NBT Bancorp Inc. / VANGUARD GROUP INC - SCHEDULE 13G/A Passive Investment

SC 13G/A 1 tv01520-nbtbancorpinc.htm SCHEDULE 13G/A SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Schedule 13G Under the Securities Exchange Act of 1934 (Amendment No.: 15)* Name of issuer: NBT Bancorp Inc Title of Class of Securities: Common Stock CUSIP Number: 628778102 Date of Event Which Requires Filing of this Statement: December 29, 2023 Check the appropriate box to designate the

January 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): January 23, 2024 NBT BANCORP INC. (Exact name of registrant as specified in its charter) Delaware 000-14703 16-1268674 (State or other jurisdiction of incorporation or organization) (

January 23, 2024 EX-99.1

NBT BANCORP INC. ANNOUNCES FULL YEAR NET INCOME AND DECLARES DIVIDEND

Exhibit 99.1 FOR IMMEDIATE RELEASE ATTENTION: FINANCIAL AND BUSINESS EDITORS Contact: John H. Watt, Jr., President and CEO Scott A. Kingsley, Executive Vice President and CFO NBT Bancorp Inc. 52 South Broad Street Norwich, NY 13815 607-337-6589 NBT BANCORP INC. ANNOUNCES FULL YEAR NET INCOME AND DECLARES DIVIDEND NORWICH, NY (January 23, 2024) – NBT Bancorp Inc. (“NBT” or the “Company”) (NASDAQ: N

January 22, 2024 EX-99.1

NBT BANCORP INC. ANNOUNCES CEO SUCCESSION PLAN

Exhibit 99.1 FOR IMMEDIATE RELEASE ATTENTION: FINANCIAL AND BUSINESS EDITORS NBT BANCORP INC. ANNOUNCES CEO SUCCESSION PLAN NORWICH, NY (January 22, 2024) – NBT Bancorp Inc. (“NBT” or the “Company”) (NASDAQ: NBTB) announced today that, effective May 21, 2024, John H. Watt, Jr. will step down as NBT’s President and Chief Executive Officer. Watt will continue to serve on the Board of Directors and b

January 22, 2024 8-K

Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers, Financial Statements and Exhibits, 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 22, 2024 NBT BANCORP INC. (Exact name of registrant as specified in its charter) Delaware 000-14703 16-1268674 (State or other jurisdiction of incorporation or organization) (

December 19, 2023 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): December 18, 2023 NBT BANCORP INC. (Exact name of registrant as specified in its charter) Delaware 000-14703 16-1268674 (State or other jurisdiction of incorporation or organization)

November 14, 2023 8-K

Regulation FD Disclosure

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 14, 2023 NBT BANCORP INC. (Exact name of registrant as specified in its charter) Delaware 000-14703 16-1268674 (State or other jurisdiction of incorporation or organization)

November 9, 2023 10-Q

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

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 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 0-14703 NBT B

October 24, 2023 8-K

Financial Statements and Exhibits, Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): October 24, 2023 NBT BANCORP INC. (Exact name of registrant as specified in its charter) Delaware 000-14703 16-1268674 (State or other jurisdiction of incorporation or organization) (

October 24, 2023 EX-99.1

NBT BANCORP INC. ANNOUNCES THIRD QUARTER RESULTS AND DECLARES DIVIDEND

Exhibit 99.1 FOR IMMEDIATE RELEASE ATTENTION: FINANCIAL AND BUSINESS EDITORS Contact: John H. Watt, Jr., President and CEO Scott A. Kingsley, Executive Vice President and CFO NBT Bancorp Inc. 52 South Broad Street Norwich, NY 13815 607-337-6589 NBT BANCORP INC. ANNOUNCES THIRD QUARTER RESULTS AND DECLARES DIVIDEND NORWICH, NY (October 24, 2023) – NBT Bancorp Inc. (“NBT” or the “Company”) (NASDAQ:

September 1, 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): September 1, 2023 NBT BANCORP INC

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 1, 2023 NBT BANCORP INC. (Exact name of registrant as specified in its charter) Delaware 000-14703 16-1268674 (State or other jurisdiction of incorporation or organization)

August 14, 2023 EX-2.2

First Amendment to Agreement and Plan of Merger, dated as of August 9, 2023, by and among NBT Bancorp Inc., NBT Bank, National Association, Salisbury Bancorp, Inc. and Salisbury Bank and Trust Company

Exhibit 2.2 FIRST AMENDMENT TO AGREEMENT AND PLAN OF MERGER This FIRST AMENDMENT TO AGREEMENT AND PLAN OF MERGER (this “Amendment”) is dated as of August 9, 2023, by and among NBT Bancorp Inc., a Delaware corporation (“NBT”), NBT Bank, National Association, a federally-chartered national banking association and wholly-owned subsidiary of NBT (“NBT Bank”), Salisbury Bancorp, Inc., a Connecticut cor

August 14, 2023 8-K

Regulation FD Disclosure, 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, 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): August 11, 2023 NBT BANCORP INC. (Exact name of registrant as specified in its charter) Delaware 000-14703 16-1268674 (State or other jurisdiction of incorporation) (Commission File N

August 14, 2023 EX-99.1

NBT BANCORP INC. COMPLETES MERGER WITH SALISBURY BANCORP, INC. AND ANNOUNCES INCREASED CASH DIVIDEND

Exhibit 99.1 1 FOR IMMEDIATE RELEASE ATTENTION: FINANCIAL AND BUSINESS EDITORS Contact: John H. Watt, Jr., President and CEO Scott A. Kingsley, Executive Vice President and CFO NBT Bancorp Inc. 52 South Broad Street Norwich, NY 13815 607-337-6589 NBT BANCORP INC. COMPLETES MERGER WITH SALISBURY BANCORP, INC. AND ANNOUNCES INCREASED CASH DIVIDEND NORWICH, NY (August 14, 2023) (GLOBE NEWSWIRE) – NBT

August 7, 2023 10-Q

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

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 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 0-14703 NBT BANCOR

July 31, 2023 8-K

Financial Statements and Exhibits, Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): July 31, 2023 NBT BANCORP INC. (Exact name of registrant as specified in its charter) Delaware 000-14703 16-1268674 (State or other jurisdiction of incorporation or organization) (Com

July 31, 2023 EX-99.1

NBT BANCORP INC. ANNOUNCES SECOND QUARTER NET INCOME OF $30.1 MILLION ($0.70 PER DILUTED COMMON SHARE)

Exhibit 99.1 FOR IMMEDIATE RELEASE ATTENTION: FINANCIAL AND BUSINESS EDITORS Contact: John H. Watt, Jr., President and CEO Scott A. Kingsley, Executive Vice President and CFO NBT Bancorp Inc. 52 South Broad Street Norwich, NY 13815 607-337-6589 NBT BANCORP INC. ANNOUNCES SECOND QUARTER NET INCOME OF $30.1 MILLION ($0.70 PER DILUTED COMMON SHARE) NORWICH, NY (July 31, 2023) – NBT Bancorp Inc. (“NBT

July 10, 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 10, 2023 NBT BANCORP INC. (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): July 10, 2023 NBT BANCORP INC. (Exact name of Registrant as Specified in Its Charter) Delaware 000-14703 16-1268674 (State or Other Jurisdiction of Incorporation) (Commission File Num

July 10, 2023 EX-99.1

NBT BANCORP INC. RECEIVES REGULATORY APPROVAL, ANNOUNCES DATE FOR MERGER WITH SALISBURY BANCORP, INC.

Exhibit 99.1 1 FOR IMMEDIATE RELEASE ATTENTION: FINANCIAL AND BUSINESS EDITORS Contact: John H. Watt, Jr., President and CEO Scott A. Kingsley, Executive Vice President and CFO NBT Bancorp Inc. 52 South Broad Street Norwich, NY 13815 607-337-6589 NBT BANCORP INC. RECEIVES REGULATORY APPROVAL, ANNOUNCES DATE FOR MERGER WITH SALISBURY BANCORP, INC. NORWICH, NY (July 10, 2023) (GLOBE NEWSWIRE) – NBT

July 10, 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): July 10, 2023 NBT BANCORP INC. (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): July 10, 2023 NBT BANCORP INC. (Exact name of Registrant as Specified in Its Charter) Delaware 000-14703 16-1268674 (State or Other Jurisdiction of Incorporation) (Commission File Num

June 29, 2023 11-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 11-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 11-K (Mark One): ☒ ANNUAL REPORT PURSUANT TO SECTION 15 (d) OF THE SECURITIES EXCHANGE ACT OF 1934. For the fiscal year ended December 31, 2022 OR ☐ TRANSITION REPORT PURSUANT TO SECTION 15 (d) OF THE SECURITIES EXCHANGE ACT OF 1934. For the transition period from to . Commission File No. 0-14703 A. Full title of the plan

June 5, 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 5, 2023 NBT BANCORP INC. (Ex

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 5, 2023 NBT BANCORP INC. (Exact name of registrant as specified in its charter) Delaware 000-14703 16-1268674 (State or other jurisdiction of incorporation or organization) (Comm

May 17, 2023 8-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): May 16, 2023 NBT BANCORP INC. (Ex

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, 2023 NBT BANCORP INC. (Exact name of registrant as specified in its charter) Delaware 000-14703 16-1268674 (State or other jurisdiction of incorporation or organization) (Comm

May 17, 2023 EX-99.1

NBT BANCORP INC. ANNOUNCES CASH DIVIDEND

Exhibit 99.1 FOR IMMEDIATE RELEASE ATTENTION: FINANCIAL AND BUSINESS EDITORS Contact: John H. Watt, Jr., President and CEO Scott A. Kingsley, Executive Vice President and CFO NBT Bancorp Inc. 52 South Broad Street Norwich, NY 13815 607-337-6589 NBT BANCORP INC. ANNOUNCES CASH DIVIDEND NORWICH, NY (May 16, 2023) – The Board of Directors of NBT Bancorp Inc. (“NBT” or the “Company”) (NASDAQ: NBTB) ap

May 15, 2023 8-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): May 15, 2023 NBT BANCORP INC. (Ex

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 NBT BANCORP INC. (Exact name of registrant as specified in its charter) Delaware 000-14703 16-1268674 (State or other jurisdiction of incorporation or organization) (Comm

May 10, 2023 10-Q

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

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 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 0-14703 NBT BANCO

April 24, 2023 EX-99.1

NBT BANCORP INC. ANNOUNCES FIRST QUARTER NET INCOME OF $33.7 MILLION ($0.78 PER DILUTED COMMON SHARE)

Exhibit 99.1 1 FOR IMMEDIATE RELEASE ATTENTION: FINANCIAL AND BUSINESS EDITORS Contact: John H. Watt, Jr., President and CEO Scott A. Kingsley, Executive Vice President and CFO NBT Bancorp Inc. 52 South Broad Street Norwich, NY 13815 607-337-6589 NBT BANCORP INC. ANNOUNCES FIRST QUARTER NET INCOME OF $33.7 MILLION ($0.78 PER DILUTED COMMON SHARE) NORWICH, NY (April 24, 2023) – NBT Bancorp Inc. (“N

April 24, 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 24, 2023 NBT BANCORP INC. (

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 24, 2023 NBT BANCORP INC. (Exact name of registrant as specified in its charter) Delaware 000-14703 16-1268674 (State or other jurisdiction of incorporation or organization) (Co

April 13, 2023 EX-99.1

NBT BANCORP INC. ANNOUNCES SHAREHOLDER APPROVAL RECEIVED BY SALISBURY BANCORP, INC. FOR MERGER

Exhibit 99.1 FOR IMMEDIATE RELEASE ATTENTION: FINANCIAL AND BUSINESS EDITORS Contact: John H. Watt, Jr., President and CEO Scott A. Kingsley, Executive Vice President and CFO NBT Bancorp Inc. 52 South Broad Street Norwich, NY 13815 607-337-6589 NBT BANCORP INC. ANNOUNCES SHAREHOLDER APPROVAL RECEIVED BY SALISBURY BANCORP, INC. FOR MERGER NORWICH, NY (April 13, 2023) (GLOBE NEWSWIRE) – NBT Bancorp

April 13, 2023 EX-99.1

NBT BANCORP INC. ANNOUNCES SHAREHOLDER APPROVAL RECEIVED BY SALISBURY BANCORP, INC. FOR MERGER

Exhibit 99.1 FOR IMMEDIATE RELEASE ATTENTION: FINANCIAL AND BUSINESS EDITORS Contact: John H. Watt, Jr., President and CEO Scott A. Kingsley, Executive Vice President and CFO NBT Bancorp Inc. 52 South Broad Street Norwich, NY 13815 607-337-6589 NBT BANCORP INC. ANNOUNCES SHAREHOLDER APPROVAL RECEIVED BY SALISBURY BANCORP, INC. FOR MERGER NORWICH, NY (April 13, 2023) (GLOBE NEWSWIRE) – NBT Bancorp

April 13, 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): April 13, 2023 NBT BANCORP INC. (

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 13, 2023 NBT BANCORP INC. (Exact name of Registrant as Specified in Its Charter) Delaware 000-14703 16-1268674 (State or Other Jurisdiction of Incorporation) (Commission File Nu

April 13, 2023 8-K

Financial Statements and Exhibits, Other Events

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): April 13, 2023 NBT BANCORP INC. (Exact name of Registrant as Specified in Its Charter) Delaware 000-14703 16-1268674 (State or Other Jurisdiction of Incorporation) (Commission File Nu

April 6, 2023 DEF 14A

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

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

April 6, 2023 DEFA14A

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

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

April 3, 2023 8-K

Other Events

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): April 3, 2023 NBT BANCORP INC. (Exact name of Registrant as Specified in Its Charter) Delaware 000-14703 16-1268674 (State or Other Jurisdiction of Incorporation) (Commission File Num

April 3, 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): April 3, 2023 NBT BANCORP INC. (E

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): April 3, 2023 NBT BANCORP INC. (Exact name of Registrant as Specified in Its Charter) Delaware 000-14703 16-1268674 (State or Other Jurisdiction of Incorporation) (Commission File Num

March 21, 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): March 20, 2023 NBT BANCORP INC. (

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 20, 2023 NBT BANCORP INC. (Exact name of registrant as specified in its charter) Delaware 000-14703 16-1268674 (State or other jurisdiction of incorporation or organization) (Co

March 1, 2023 10-K

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

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, 2022 OR ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 FOR THE TRANSITION PERIOD FROM TO .

March 1, 2023 EX-10.16

Employment Agreement, dated November 1, 2021, by and between NBT Bancorp Inc. and Ruth H. Mahoney

Exhibit 10.16 EMPLOYMENT AGREEMENT This EMPLOYMENT AGREEMENT (the “Agreement”) is made and entered into as of November 1, 2021, by and between RUTH H. MAHONEY (“Executive”) and NBT BANCORP INC., a Delaware corporation having its principal office in Norwich, New York (“NBTB”). W I T N E S S E T H : WHEREAS, NBTB and NBT Bank, National Association, a national banking association which is a wholly-ow

March 1, 2023 424B3

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

TABLE OF CONTENTS Filed Pursuant to Rule 424(b)(3) Registration No. 333-269742   Proxy Statement/Prospectus   MERGER PROPOSED—YOUR VOTE IS VERY IMPORTANT Dear Shareholder: On December 5, 2022, NBT Bancorp Inc. (“NBT”), NBT’s wholly-owned subsidiary, NBT Bank, National Association (“NBT Bank”), Salisbury Bancorp, Inc. (“Salisbury”) and Salisbury’s wholly-owned subsidiary, Salisbury Bank and Trust C

March 1, 2023 EX-21

A list of the subsidiaries of the Registrant.

EXHIBIT 21 List of Subsidiaries of the Registrant Jurisdiction of Incorporation Names Under Which Subsidiary does Business NBT Bancorp Inc.

March 1, 2023 EX-10.17

Employment Agreement, dated May 23, 2022, by and between NBT Bancorp Inc. and M. Randolph Sparks

Exhibit 10.17 EMPLOYMENT AGREEMENT This EMPLOYMENT AGREEMENT (the “Agreement”) is made and entered into as of May 23, 2022, by and between M. RANDOLPH SPARKS (“Executive”) and NBT BANCORP INC., a Delaware corporation having its principal office in Norwich, New York (“NBTB”). W I T N E S S E T H : WHEREAS, NBTB and NBT Bank, National Association, a national banking association which is a wholly-own

February 24, 2023 S-4/A

As filed with the Securities and Exchange Commission on February 24, 2023

TABLE OF CONTENTS As filed with the Securities and Exchange Commission on February 24, 2023 Registration No.

February 24, 2023 CORRESP

NBT Bancorp Inc. 52 South Broad Street Norwich, New York 13815

NBT Bancorp Inc. 52 South Broad Street Norwich, New York 13815 February 24, 2023 VIA EDGAR U.S. Securities and Exchange Commission Division of Corporation Finance Office of Industrial Applications and Services 100 F Street, N.E. Washington, D.C. 20549 Re: NBT Bancorp Inc. Registration Statement on Form S-4 (File No. 333-269742) Request for Acceleration of Effective Date Dear Ms. Madeline Mateo: Pu

February 24, 2023 EX-99.2

EX-99.2

Exhibit 99.2

February 14, 2023 8-K

Regulation FD Disclosure

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 14, 2023 NBT BANCORP INC. (Exact name of registrant as specified in its charter) Delaware 000-14703 16-1268674 (State or other jurisdiction of incorporation or organization)

February 13, 2023 EX-99.1

January 16, 2023

Exhibit 99.1 January 16, 2023 Salisbury Bancorp, Inc. 5 Bissell Street Lakeville, CT 06039 Re: Fairness Opinion Consent To whom it may concern, We hereby consent to the inclusion of our opinion letter to the board of directors of Salisbury Bancorp, Inc. (“Salisbury”) as an Appendix to the Form S-4, relating to the proposed merger of Salisbury with NBT Bancorp Inc. described in the Form S-4, and to

February 13, 2023 EX-FILING FEES

Calculation of Filing Fee Tables Form S-4 (Form Type) NBT Bancorp Inc. (Exact Name of Registrant as Specified in its Charter) Table 1: Newly Registered and Carry Forward Securities

Exhibit 107 Calculation of Filing Fee Tables Form S-4 (Form Type) NBT Bancorp Inc.

February 13, 2023 EX-10.1

VOTING AGREEMENT

EX-10.1 5 ny20007356x1ex10-1.htm EXHIBIT 10.1 Exhibit 10.1 VOTING AGREEMENT This VOTING AGREEMENT (this “Agreement”) is dated as of December 5, 2022, by and between [] (the “Shareholder”) and NBT Bancorp Inc., a Delaware corporation (“NBT”). All terms used herein and not defined herein shall have the meanings assigned thereto in the Merger Agreement (as defined below). WHEREAS, concurrently with t

February 13, 2023 EX-99.2

EX-99.2

Exhibit 99.2

February 13, 2023 S-4

As filed with the Securities and Exchange Commission on February 13, 2023

TABLE OF CONTENTS As filed with the Securities and Exchange Commission on February 13, 2023 Registration No.

February 9, 2023 SC 13G/A

NBTB / NBT Bancorp Inc. / VANGUARD GROUP INC - SCHEDULE 13G/A Passive Investment

SC 13G/A 1 tv01490-nbtbancorpinc.htm SCHEDULE 13G/A SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Schedule 13G Under the Securities Exchange Act of 1934 (Amendment No.: 14)* Name of issuer: NBT Bancorp Inc. Title of Class of Securities: Common Stock CUSIP Number: 628778102 Date of Event Which Requires Filing of this Statement: December 30, 2022 Check the appropriate box to designate th

January 23, 2023 EX-99.1

NBT BANCORP INC. ANNOUNCES FULL YEAR NET INCOME OF $152.0 MILLION ($3.52 PER DILUTED COMMON SHARE); APPROVES DIVIDEND

Exhibit 99.1 1 FOR IMMEDIATE RELEASE ATTENTION: FINANCIAL AND BUSINESS EDITORS Contact: John H. Watt, Jr., President and CEO Scott A. Kingsley, Executive Vice President and CFO NBT Bancorp Inc. 52 South Broad Street Norwich, NY 13815 607-337-6589 NBT BANCORP INC. ANNOUNCES FULL YEAR NET INCOME OF $152.0 MILLION ($3.52 PER DILUTED COMMON SHARE); APPROVES DIVIDEND NORWICH, NY (January 23, 2023) – NB

January 23, 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 23, 2023 NBT BANCORP INC. (Exact name of registrant as specified in its charter) Delaware 000-14703 16-1268674 (State or other jurisdiction of incorporation or organization) (

December 6, 2022 425

NBT Bancorp Inc.(Special Announcement) December 05, 2022

Filed by NBT Bancorp Inc. (Commission File No. 000-14703) 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: Salisbury Bancorp, Inc. (Commission File No. 001-14854) The following is a transcript of a call hosted by NBT Bancorp Inc. (?NBT? ) on December 5, 2022. NBT Bancorp Inc.(Special Announceme

December 5, 2022 EX-99.1

NBT BANCORP AND SALISBURY BANCORP ANNOUNCE AGREEMENT TO MERGE

Exhibit 99.1 FOR IMMEDIATE RELEASE NBT BANCORP AND SALISBURY BANCORP ANNOUNCE AGREEMENT TO MERGE ? Natural Extension into Attractive Contiguous Markets with High-Quality Partner ? Additional Scale in Combined Connecticut Footprint ? Expansion into Hudson Valley Region of Upstate New York?s ?Chip Corridor? ? Immediate Market Premium to Salisbury Shareholders and an approximate 40% dividend improvem

December 5, 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): December 5, 2022 NBT BANCORP INC.

false000079035900007903592022-12-052022-12-05 UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.

December 5, 2022 425

1 A Partnership for Growth December 5, 2022 Forward-Looking Statements 2 This presentation contains forward-looking statements as defined in the Private Securities Litigation Reform Act of 1995. Such forward-looking statements about NBT Bancorp Inc.

Filed by NBT Bancorp Inc. (Commission File No. 000-14703) 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: Salisbury Bancorp, Inc. (Commission File No. 001-14854) 1 A Partnership for Growth December 5, 2022 Forward-Looking Statements 2 This presentation contains forward-looking statements as de

December 5, 2022 EX-2.1

AGREEMENT AND PLAN OF MERGER DATED AS OF DECEMBER 5, 2022 BY AND AMONG NBT BANCORP INC., NBT BANK, N.A., SALISBURY BANCORP, INC. SALISBURY BANK AND TRUST COMPANY TABLE OF CONTENTS

Exhibit 2.1 AGREEMENT AND PLAN OF MERGER DATED AS OF DECEMBER 5, 2022 BY AND AMONG NBT BANCORP INC., NBT BANK, N.A., SALISBURY BANCORP, INC. AND SALISBURY BANK AND TRUST COMPANY TABLE OF CONTENTS Page ARTICLE I THE MERGER 1 Section 1.01 Terms of the Merger 1 Section 1.02 Tax Consequences 2 Section 1.03 Name of the Surviving Corporation and the Surviving Bank 2 Section 1.04 Charter and Bylaws of th

December 5, 2022 EX-2.1

Agreement and Plan of Merger, dated as of December 5, 2022, by and among NBT Bancorp Inc., NBT Bank, N.A., Salisbury Bancorp, Inc. and Salisbury Bank and Trust Company

Exhibit 2.1 AGREEMENT AND PLAN OF MERGER DATED AS OF DECEMBER 5, 2022 BY AND AMONG NBT BANCORP INC., NBT BANK, N.A., SALISBURY BANCORP, INC. AND SALISBURY BANK AND TRUST COMPANY TABLE OF CONTENTS Page ARTICLE I THE MERGER 1 Section 1.01 Terms of the Merger 1 Section 1.02 Tax Consequences 2 Section 1.03 Name of the Surviving Corporation and the Surviving Bank 2 Section 1.04 Charter and Bylaws of th

December 5, 2022 8-K

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): December 5, 2022 NBT BANCORP INC. (Exact name of Registrant as Specified in Its Charter) Delaware 000-14703 16-1268674 (State or Other Jurisdiction of Incorporation) (Commission File

December 5, 2022 425

Filed by NBT Bancorp Inc.

Filed by NBT Bancorp Inc. (Commission File No. 000-14703) 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: Salisbury Bancorp, Inc. (Commission File No. 001-14854) In connection with the pending transaction among NBT Bancorp Inc. (?NBT?), NBT Bank, N.A., Salisbury Bancorp, Inc. and Salisbury Ban

December 5, 2022 EX-99.1

NBT BANCORP AND SALISBURY BANCORP ANNOUNCE AGREEMENT TO MERGE

Exhibit 99.1 FOR IMMEDIATE RELEASE NBT BANCORP AND SALISBURY BANCORP ANNOUNCE AGREEMENT TO MERGE ? Natural Extension into Attractive Contiguous Markets with High-Quality Partner ? Additional Scale in Combined Connecticut Footprint ? Expansion into Hudson Valley Region of Upstate New York?s ?Chip Corridor? ? Immediate Market Premium to Salisbury Shareholders and an approximate 40% dividend improvem

November 9, 2022 10-Q

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

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D. C. 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 0-14703 NBT

November 7, 2022 8-K

Regulation FD Disclosure

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 7, 2022 NBT BANCORP INC. (Exact name of registrant as specified in its charter) Delaware 000-14703 16-1268674 (State or other jurisdiction of incorporation or organization) (

October 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): October 25, 2022 NBT BANCORP INC. (Exact name of registrant as specified in its charter) Delaware 000-14703 16-1268674 (State or other jurisdiction of incorporation or organization) (

October 25, 2022 EX-99.1

NBT BANCORP INC. ANNOUNCES THIRD QUARTER NET INCOME OF $39.0 MILLION ($0.90 PER DILUTED COMMON SHARE); APPROVES DIVIDEND

Exhibit 99.1 1 FOR IMMEDIATE RELEASE ATTENTION: FINANCIAL AND BUSINESS EDITORS Contact: John H. Watt, Jr., President and CEO Scott A. Kingsley, Executive Vice President and CFO NBT Bancorp Inc. 52 South Broad Street Norwich, NY 13815 607-337-6589 NBT BANCORP INC. ANNOUNCES THIRD QUARTER NET INCOME OF $39.0 MILLION ($0.90 PER DILUTED COMMON SHARE); APPROVES DIVIDEND NORWICH, NY (October 25, 2022) ?

August 24, 2022 8-K

Regulation FD Disclosure

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): August 24, 2022 NBT BANCORP INC. (Exact name of registrant as specified in its charter) Delaware (State or other jurisdiction of incorporation or organization) 000-14703 (Commission F

August 8, 2022 10-Q

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

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D. C. 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 0-14703 NBT BANCO

July 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): July 25, 2022 NBT BANCORP INC. (Exact name of registrant as specified in its charter) Delaware 000-14703 16-1268674 (State or other jurisdiction of incorporation or organization) (Com

July 25, 2022 EX-99.1

NBT BANCORP INC. ANNOUNCES SECOND QUARTER NET INCOME OF $37.8 MILLION ($0.88 PER DILUTED COMMON SHARE); APPROVES A 7.1% DIVIDEND INCREASE

Exhibit 99.1 1 FOR IMMEDIATE RELEASE ATTENTION: FINANCIAL AND BUSINESS EDITORS Contact: John H. Watt, Jr., President and CEO Scott A. Kingsley, Executive Vice President and CFO NBT Bancorp Inc. 52 South Broad Street Norwich, NY 13815 607-337-6589 NBT BANCORP INC. ANNOUNCES SECOND QUARTER NET INCOME OF $37.8 MILLION ($0.88 PER DILUTED COMMON SHARE); APPROVES A 7.1% DIVIDEND INCREASE NORWICH, NY (Ju

June 27, 2022 11-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 11-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 11-K (Mark One): ? ANNUAL REPORT PURSUANT TO SECTION 15 (d) OF THE SECURITIES EXCHANGE ACT OF 1934. For the fiscal year ended December 31, 2021 OR ? TRANSITION REPORT PURSUANT TO SECTION 15 (d) OF THE SECURITIES EXCHANGE ACT OF 1934. For the transition period from to . Commission File No. 0-14703 A. Full title of the plan

May 18, 2022 8-K

Regulation FD Disclosure, Financial Statements and Exhibits, Other Events, 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, 2022 NBT BANCORP INC. (Exact name of registrant as specified in its charter) Delaware 000-14703 16-1268674 (State or other jurisdiction of incorporation or organization) (Comm

May 18, 2022 EX-99.1

NBT BANCORP INC. ANNOUNCES CASH DIVIDEND

Exhibit 99.1 FOR IMMEDIATE RELEASE ATTENTION: FINANCIAL AND BUSINESS EDITORS Contact: John H. Watt, Jr., President and CEO Scott A. Kingsley, Executive Vice President and CFO NBT Bancorp Inc. 52 South Broad Street Norwich, NY 13815 607-337-6589 NBT BANCORP INC. ANNOUNCES CASH DIVIDEND NORWICH, NY (May 17, 2022) ? The Board of Directors of NBT Bancorp Inc. (?NBT? or the ?Company?) (NASDAQ: NBTB) ap

May 16, 2022 8-K

Regulation FD Disclosure

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 NBT BANCORP INC. (Exact name of registrant as specified in its charter) Delaware 000-14703 16-1268674 (State or other jurisdiction of incorporation or organization) (Comm

May 9, 2022 10-Q

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

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D. C. 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 0-14703 NBT BANC

May 2, 2022 8-K

Regulation FD Disclosure

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 2, 2022 NBT BANCORP INC. (Exact name of registrant as specified in its charter) Delaware 000-14703 16-1268674 (State or other jurisdiction of incorporation or organization) (Commi

April 25, 2022 EX-99.1

NBT BANCORP INC. ANNOUNCES FIRST QUARTER NET INCOME OF $39.1 MILLION ($0.90 PER DILUTED COMMON SHARE)

Exhibit 99.1 1 FOR IMMEDIATE RELEASE ATTENTION: FINANCIAL AND BUSINESS EDITORS Contact: John H. Watt, Jr., President and CEO Scott A. Kingsley, Executive Vice President and CFO NBT Bancorp Inc. 52 South Broad Street Norwich, NY 13815 607-337-6589 NBT BANCORP INC. ANNOUNCES FIRST QUARTER NET INCOME OF $39.1 MILLION ($0.90 PER DILUTED COMMON SHARE) NORWICH, NY (April 25, 2022) ? NBT Bancorp Inc. (?N

April 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): April 25, 2022 NBT BANCORP INC. (Exact name of registrant as specified in its charter) Delaware 000-14703 16-1268674 (State or other jurisdiction of incorporation or organization) (Co

April 7, 2022 DEF 14A

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.  )

DEF 14A 1 ny20002518x1def14a.htm DEF 14A 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 Registrant ☑ Filed by Party other than the Registrant  ☐ Check the appropriate box:  ☐ Preliminary Proxy Statement  ☐ Confidential, for Use of the C

April 7, 2022 DEFA14A

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

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

March 1, 2022 EX-10.19

NBT Bancorp Inc. 2015 Enhanced Separation Pay Plan.*

Exhibit 10.19 NBT BANCORP INC. ENHANCED SEPARATION PAY PLAN Effective January 21 2015 NBT BANCORP INC. ENHANCED SEPARATION PAY PLAN ARTICLE I INTRODUCTON 1.1 General Information. The NBT Bancorp Inc. Enhanced Separation Pay Plan is an employee benefit plan maintained by NBT Bancorp Inc. and Affiliates of the Company to provide a Separation Payment who separate from service due to a Qualifying Sepa

March 1, 2022 EX-21

A list of the subsidiaries of the Registrant.

EXHIBIT 21 List of Subsidiaries of the Registrant Jurisdiction of Incorporation Names Under Which Subsidiary does Business NBT Bancorp Inc.

March 1, 2022 EX-10.18

Employment Agreement, dated January 1, 2018, by and between NBT Bancorp Inc. and Amy Wiles

Exhibit 10.18 EMPLOYMENT AGREEMENT This EMPLOYMENT AGREEMENT (the ?Agreement?) is made and entered into as of January 1, 2018, by and between AMY WILES-MORELLI (?Executive?) and NBT BANCORP INC., a Delaware corporation having its principal office in Norwich, New York (?NBTB?). W I T N E S S E T H : WHEREAS, NBTB and NBT Bank, National Association, a national banking association which is a wholly-o

March 1, 2022 10-K

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

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, 2021 OR ? TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 FOR THE TRANSITION PERIOD FROM TO .

March 1, 2022 EX-10.20

Acknowledgement of NBT Bancorp Inc. Enhanced Separation Pay Plan, dated May 4, 2021 by and between NBT Bancorp Inc. and Annette L. Burns.*

Exhibit 10.20 ACKNOWLEDGEMENT NBT Bancorp Inc. This Acknowledgement (the ?Acknowledgement?) is entered into on May 4, 2021, by and between NBT Bancorp Inc. (the ?Company?) and Annette Burns (the ?Employee?). I, Annette Burns, understand that, pursuant to this Acknowledgment, I am eligible to participate in the NBT Bancorp Inc. Enhanced Separation Pay Plan (the ?Plan?) and receive a severance payme

February 10, 2022 SC 13G/A

NBTB / NBT Bancorp Inc. / VANGUARD GROUP INC - SCHEDULE 13G/A Passive Investment

SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Schedule 13G Under the Securities Exchange Act of 1934 (Amendment No.: 13)* Name of issuer: NBT Bancorp Inc. Title of Class of Securities: Common Stock CUSIP Number: 628778102 Date of Event Which Requires Filing of this Statement: December 31, 2021 Check the appropriate box to designate the rule pursuant to which this Schedule is filed: ??R

February 1, 2022 8-K

Regulation FD Disclosure

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 1, 2022 NBT BANCORP INC. (Exact name of registrant as specified in its charter) Delaware 000-14703 16-1268674 (State or other jurisdiction of incorporation or organization) (

January 26, 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 26, 2022 NBT BANCORP INC. (Exact name of registrant as specified in its charter) Delaware 000-14703 16-1268674 (State or other jurisdiction of incorporation or organization) (

January 26, 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): January 26, 2022 NBT BANCORP INC. (Exact name of registrant as specified in its charter) Delaware 000-14703 16-1268674 (State or other jurisdiction of incorporation or organization) (

January 26, 2022 EX-99.1

HEIDI M. HOELLER JOINS NBT BOARD OF DIRECTORS

Exhibit 99.1 Contact: Florence Doller SVP & Director of Corporate Communications 607.337.6118 | [email protected] HEIDI M. HOELLER JOINS NBT BOARD OF DIRECTORS NORWICH, NY (January 26, 2022) ? NBT Bancorp Inc. (?NBT? or the ?Company?) (NASDAQ: NBTB) announced today that Heidi M. Hoeller has joined the Boards of Directors for NBT Bancorp Inc. and NBT Bank, N.A. Hoeller is a retired Partner of Pri

January 26, 2022 EX-99.1

NBT BANCORP INC. ANNOUNCES NET INCOME OF $154.9 MILLION ($3.54 PER DILUTED COMMON SHARE); APPROVES DIVIDEND

Exhibit 99.1 1 FOR IMMEDIATE RELEASE ATTENTION: FINANCIAL AND BUSINESS EDITORS Contact: John H. Watt, Jr., President and CEO Scott A. Kingsley, Executive Vice President and CFO NBT Bancorp Inc. 52 South Broad Street Norwich, NY 13815 607-337-6589 NBT BANCORP INC. ANNOUNCES NET INCOME OF $154.9 MILLION ($3.54 PER DILUTED COMMON SHARE); APPROVES DIVIDEND NORWICH, NY (January 26, 2022) ? NBT Bancorp

January 7, 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): January 7, 2022 NBT BANCORP INC. (Exact name of registrant as specified in its charter) Delaware 000-14703 16-1268674 (State or other jurisdiction of incorporation or organization) (C

November 9, 2021 10-Q

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

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D. C. 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 0-14703 NBT

November 2, 2021 8-K

Regulation FD Disclosure

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 2, 2021 NBT BANCORP INC. (Exact name of registrant as specified in its charter) Delaware (State or other jurisdiction of incorporation or organization) 000-14703 (Commission

October 26, 2021 EX-99.1

NBT BANCORP INC. ANNOUNCES THIRD QUARTER NET INCOME OF $37.4 MILLION ($0.86 PER DILUTED COMMON SHARE); APPROVES DIVIDEND

Exhibit 99.1 1 FOR IMMEDIATE RELEASE ATTENTION: FINANCIAL AND BUSINESS EDITORS Contact: John H. Watt, Jr., President and CEO Scott A. Kingsley, Executive Vice President and CFO NBT Bancorp Inc. 52 South Broad Street Norwich, NY 13815 607-337-6589 NBT BANCORP INC. ANNOUNCES THIRD QUARTER NET INCOME OF $37.4 MILLION ($0.86 PER DILUTED COMMON SHARE); APPROVES DIVIDEND NORWICH, NY (October 26, 2021) ?

October 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): October 26, 2021 NBT BANCORP INC. (Exact name of registrant as specified in its charter) Delaware 000-14703 16-1268674 (State or other jurisdiction of incorporation or organization) (

September 8, 2021 8-K

Regulation FD Disclosure

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 8, 2021 NBT BANCORP INC. (Exact name of registrant as specified in its charter) Delaware 000-14703 16-1268674 (State or other jurisdiction of incorporation or organization)

August 30, 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): August 30, 2021 NBT BANCORP INC. (Exact name of registrant as specified in its charter) Delaware 000-14703 16-1268674 (State or other jurisdiction of incorporation or organization) (C

August 30, 2021 EX-99.1

NBT BANCORP INC. APPOINTS RUTH MAHONEY PRESIDENT OF WEALTH MANAGEMENT

Exhibit 99.1 Contact: Florence Doller SVP & Director of Corporate Communications 607.337.6118 [email protected] NBT BANCORP INC. APPOINTS RUTH MAHONEY PRESIDENT OF WEALTH MANAGEMENT NORWICH, NY (August 30, 2021) NBT Bancorp Inc. (NBT) (NASDAQ: NBTB) President and CEO John H. Watt, Jr. announced that NBT has appointed Ruth H. Mahoney Executive Vice President and President of Wealth Management. Ma

August 6, 2021 EX-10.1

Employment Agreement, dated August 5, 2021 by and between NBT Bancorp Inc. and Scott A. Kingsley

EMPLOYMENT AGREEMENT This EMPLOYMENT AGREEMENT (the ?Agreement?) is made and entered into as of August 5, 2021, by and between SCOTT A.

August 6, 2021 10-Q

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

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D. C. 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 0-14703 NBT BANCO

July 26, 2021 EX-99.1

NBT BANCORP INC. ANNOUNCES SECOND QUARTER NET INCOME OF $40.3 MILLION ($0.92 PER DILUTED COMMON SHARE); APPROVES A 3.7% DIVIDEND INCREASE

Exhibit 99.1 1 FOR IMMEDIATE RELEASE ATTENTION: FINANCIAL AND BUSINESS EDITORS Contact: John H. Watt, Jr., President and CEO Scott A. Kingsley, Executive Vice President and CFO NBT Bancorp Inc. 52 South Broad Street Norwich, NY 13815 607-337-6589 NBT BANCORP INC. ANNOUNCES SECOND QUARTER NET INCOME OF $40.3 MILLION ($0.92 PER DILUTED COMMON SHARE); APPROVES A 3.7% DIVIDEND INCREASE NORWICH, NY (Ju

July 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): July 26, 2021 NBT BANCORP INC. (Exact name of registrant as specified in its charter) Delaware 000-14703 16-1268674 (State or other jurisdiction of incorporation or organization) (Com

July 6, 2021 EX-99.1

NBT BANCORP INC. APPOINTS SCOTT KINGSLEY CFO

Exhibit 99.1 Contact: Florence Doller SVP & Director of Corporate Communications 607.337.6118 [email protected] NBT BANCORP INC. APPOINTS SCOTT KINGSLEY CFO NORWICH, NY (July 6, 2021) NBT Bancorp Inc. (NBT) (NASDAQ: NBTB) President and CEO John H. Watt, Jr. announced that Scott A. Kingsley has been appointed Executive Vice President and Chief Financial Officer. Kingsley will join NBT?s Executive

July 6, 2021 8-K

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

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 6, 2021 NBT BANCORP INC. (Exact name of registrant as specified in its charter) Delaware (State or other jurisdiction of incorporation or organization) 000-14703 (Commission File

June 25, 2021 11-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 11-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 11-K (Mark One): ? ANNUAL REPORT PURSUANT TO SECTION 15 (d) OF THE SECURITIES EXCHANGE ACT OF 1934. For the fiscal year ended December 31, 2020 OR ? TRANSITION REPORT PURSUANT TO SECTION 15 (d) OF THE SECURITIES EXCHANGE ACT OF 1934. For the transition period from to . Commission File No. 0-14703 A. Full title of the plan

June 23, 2021 8-K

Regulation FD Disclosure

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 23, 2021 NBT BANCORP INC. (Exact name of registrant as specified in its charter) Delaware 000-14703 16-1268674 (State or other jurisdiction of incorporation or organization) (Com

May 26, 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 26, 2021 NBT BANCORP INC. (Exact name of registrant as specified in its charter) Delaware (State or other jurisdiction of incorporation or organization) 000-14703 (Commission File

May 24, 2021 8-K

Regulation FD Disclosure

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 24, 2021 NBT BANCORP INC. (Exact name of registrant as specified in its charter) Delaware 000-14703 16-1268674 (State or other jurisdiction of incorporation or organization) (Comm

May 6, 2021 10-Q

Quarterly Report - 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D. C. 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 0-14703 NBT BANC

May 6, 2021 EX-10.1

Compensation arrangement for Interim Chief Financial Officer and Chief Accounting Officer

Exhibit 10.1 May 4, 2021 Ms. Annette Burns NBT Bank Dear Annette: Thank you for agreeing to become Interim Chief Financial Officer in addition to your Chief Accounting Officer role effective May 8, 2021 while we conduct the search for the new CFO. I would like to recognize you with the following: ? Your base salary will be increased to $277,750 effective May 10, 2021. You will retain this increase

April 30, 2021 S-3ASR

- S-3ASR

TABLE OF CONTENTS As filed with the Securities and Exchange Commission on April 30, 2021 Registration No.

April 30, 2021 EX-25.2

SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM T-1 STATEMENT OF ELIGIBILITY UNDER THE TRUST INDENTURE ACT OF 1939 OF A CORPORATION DESIGNATED TO ACT AS TRUSTEE Check if an Application to Determine Eligibility of a Trustee Pursuant to

Exhibit 25.2 SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM T-1 STATEMENT OF ELIGIBILITY UNDER THE TRUST INDENTURE ACT OF 1939 OF A CORPORATION DESIGNATED TO ACT AS TRUSTEE Check if an Application to Determine Eligibility of a Trustee Pursuant to Section 305(b)(2) ? U.S. BANK NATIONAL ASSOCIATION (Exact name of Trustee as specified in its charter) 31-0841368 I.R.S. Employer Identif

April 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): April 26, 2021 NBT BANCORP INC. (Exact name of registrant as specified in its charter) Delaware 000-14703 16-1268674 (State or other jurisdiction of incorporation or organization) (Co

April 26, 2021 EX-99.1

NBT BANCORP INC. ANNOUNCES FIRST QUARTER NET INCOME OF $39.8 MILLION ($0.91 PER DILUTED COMMON SHARE); APPROVES DIVIDEND

Exhibit 99.1 1 FOR IMMEDIATE RELEASE ATTENTION: FINANCIAL AND BUSINESS EDITORS Contact: John H. Watt, Jr., President and CEO John V. Moran, Executive Vice President and CFO NBT Bancorp Inc. 52 South Broad Street Norwich, NY 13815 607-337-6589 NBT BANCORP INC. ANNOUNCES FIRST QUARTER NET INCOME OF $39.8 MILLION ($0.91 PER DILUTED COMMON SHARE); APPROVES DIVIDEND NORWICH, NY (April 26, 2021) ? NBT B

April 15, 2021 DEF 14A

- DEF 14A

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 Registrant?? Filed by Party other than the Registrant?o Check the appropriate box: o Preliminary Proxy Statement o Confidential, for Use of the Commission Only (as permitted by Rule 14a-6(e)(2)) ? Definitive

April 15, 2021 DEFA14A

- DEFA14A

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

March 12, 2021 8-K

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

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): March 11, 2021 NBT BANCORP INC. (Exact name of registrant as specified in its charter) Delaware 000-14703 16-1268674 (State or other jurisdiction of incorporation or organization) (Co

March 8, 2021 8-K

Regulation FD Disclosure

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 8, 2021 NBT BANCORP INC. (Exact name of registrant as specified in its charter) Delaware 000-14703 16-1268674 (State or other jurisdiction of incorporation or organization) (Com

March 1, 2021 10-K

Annual Report - 10-K

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, 2020 OR ? TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 FOR THE TRANSITION PERIOD FROM TO .

March 1, 2021 EX-21

A list of the subsidiaries of the Registrant.

EXHIBIT 21 List of Subsidiaries of the Registrant Jurisdiction of Incorporation Names Under Which Subsidiary does Business NBT Bancorp Inc.

February 10, 2021 SC 13G/A

SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Schedule 13G Under the Securities Exchange Act of 1934 (Amendment No.: 12)*

SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Schedule 13G Under the Securities Exchange Act of 1934 (Amendment No.: 12)* Name of issuer: NBT Bancorp Inc. Title of Class of Securities: Common Stock CUSIP Number: 628778102 Date of Event Which Requires Filing of this Statement: December 31, 2020 Check the appropriate box to designate the rule pursuant to which this Schedule is filed: ☒ R

February 9, 2021 8-K

Regulation FD Disclosure

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 9, 2021 NBT BANCORP INC. (Exact name of registrant as specified in its charter) Delaware 000-14703 16-1268674 (State or other jurisdiction of incorporation or organization) (

January 27, 2021 EX-99.1

NBT BANCORP INC. ANNOUNCES NET INCOME OF $104.4 MILLION ($2.37 PER DILUTED COMMON SHARE); APPROVES DIVIDEND AND INCREASE TO SHARES AVAILABLE UNDER SHARE REPURCHASE PROGRAM

Exhibit 99.1 1 FOR IMMEDIATE RELEASE ATTENTION: FINANCIAL AND BUSINESS EDITORS Contact: John H. Watt, Jr., President and CEO John V. Moran, Executive Vice President and CFO NBT Bancorp Inc. 52 South Broad Street Norwich, NY 13815 607-337-6589 NBT BANCORP INC. ANNOUNCES NET INCOME OF $104.4 MILLION ($2.37 PER DILUTED COMMON SHARE); APPROVES DIVIDEND AND INCREASE TO SHARES AVAILABLE UNDER SHARE REPU

January 27, 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 27, 2021 NBT BANCORP INC. (Exact name of registrant as specified in its charter) Delaware 000-14703 16-1268674 (State or other jurisdiction of incorporation or organization) (

November 6, 2020 8-K

Regulation FD Disclosure - 8-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): November 6, 2020 NBT BANCORP INC. (Exact name of registrant as specified in its charter) Delaware 000-14703 16-1268674 (State or other jurisdiction of incorporation or organization) (

November 6, 2020 10-Q

Quarterly Report - 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D. C. 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 0-14703 NBT

October 26, 2020 EX-99.1

NBT BANCORP INC. ANNOUNCES THIRD QUARTER NET INCOME OF $35.1 MILLION, OR $0.80 PER DILUTED COMMON SHARE; ANNOUNCES DIVIDEND

Exhibit 99.1 1 FOR IMMEDIATE RELEASE ATTENTION: FINANCIAL AND BUSINESS EDITORS Contact: John H. Watt, Jr., President and CEO John V. Moran, Executive Vice President and CFO NBT Bancorp Inc. 52 South Broad Street Norwich, NY 13815 607-337-6589 NBT BANCORP INC. ANNOUNCES THIRD QUARTER NET INCOME OF $35.1 MILLION, OR $0.80 PER DILUTED COMMON SHARE; ANNOUNCES DIVIDEND NORWICH, NY (October 26, 2020) –

October 26, 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 26, 2020 NBT BANCORP INC. (Exact name of registrant as specified in its charter) Delaware 000-14703 16-1268674 (State or other jurisdiction of incorporation or organization) (

September 28, 2020 EX-99.1

NBT APPOINTS JOHANNA AMES TO BOARD OF DIRECTORS

Exhibit 99.1 Contact: Florence Doller SVP & Director of Corporate Communications 607.337.6118 | [email protected] NBT APPOINTS JOHANNA AMES TO BOARD OF DIRECTORS NORWICH, NY (September 28, 2020) – NBT Bancorp Inc. (“NBT” or the “Company”) (NASDAQ: NBTB) announced today that Johanna Ames has been appointed to the Boards of Directors for NBT Bancorp Inc. and NBT Bank, N.A. Ames is president of Ame

September 28, 2020 8-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): September 28, 2020 NBT BANCORP IN

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 28, 2020 NBT BANCORP INC. (Exact name of registrant as specified in its charter) Delaware 000-14703 16-1268674 (State or other jurisdiction of incorporation or organization)

August 10, 2020 10-Q

Quarterly Report - 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D. C. 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 0-14703 NBT BANCO

July 27, 2020 8-K

Financial Statements and Exhibits, Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): July 27, 2020 NBT BANCORP INC. (Exact name of registrant as specified in its charter) Delaware 000-14703 16-1268674 (State or other jurisdiction of incorporation or organization) (Com

July 27, 2020 EX-99.1

NBT BANCORP INC. ANNOUNCES SECOND QUARTER NET INCOME OF $24.7 MILLION, OR $0.56 PER DILUTED COMMON SHARE

Exhibit 99.1 1 FOR IMMEDIATE RELEASE ATTENTION: FINANCIAL AND BUSINESS EDITORS Contact: John H. Watt, Jr., President and CEO John V. Moran, Executive Vice President and CFO NBT Bancorp Inc. 52 South Broad Street Norwich, NY 13815 607-337-6589 NBT BANCORP INC. ANNOUNCES SECOND QUARTER NET INCOME OF $24.7 MILLION, OR $0.56 PER DILUTED COMMON SHARE NORWICH, NY (July 27, 2020) – NBT Bancorp Inc. (“NBT

June 26, 2020 11-K

- 11-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 11-K (Mark One): ☒ ANNUAL REPORT PURSUANT TO SECTION 15 (d) OF THE SECURITIES EXCHANGE ACT OF 1934. For the fiscal year ended December 31, 2019 OR ☐ TRANSITION REPORT PURSUANT TO SECTION 15 (d) OF THE SECURITIES EXCHANGE ACT OF 1934. For the transition period from to . Commission File No. 0-14703 A. Full title of the plan

June 23, 2020 EX-4.2

Form of 5.000% Fixed-to-Floating Rate Subordinated Notes due 2030

Exhibit 4.2 NBT BANCORP INC., Company, AND U.S. BANK NATIONAL ASSOCIATION, Trustee FIRST SUPPLEMENTAL INDENTURE Dated as of June 23, 2020 TO SUBORDINATED INDENTURE Dated as of June 23, 2020 5.000% FIXED-TO-FLOATING RATE SUBORDINATED NOTES DUE 2030 TABLE OF CONTENTS Page ARTICLE I DEFINITIONS 2 Section 1.1 Definitions 2 ARTICLE II GENERAL TERMS AND CONDITIONS OF THE NOTES 6 Section 2.1 Designation

June 23, 2020 8-K

Entry into a Material Definitive Agreement, Financial Statements and Exhibits, Creation of a Direct Financial Obligation or an Obligation under an Off-Balance Sheet Arrangement of a Registrant

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 23, 2020 NBT BANCORP INC. (Exact name of registrant as specified in its charter) Delaware 000-14703 16-1268674 (State or other jurisdiction of incorporation or organization) (Com

June 23, 2020 EX-4.1

Subordinated Indenture

Exhibit 4.1 NBT BANCORP INC. and U.S. BANK NATIONAL ASSOCIATION, as Trustee SUBORDINATED DEBT INDENTURE Dated as of June 23, 2020 1 Reconciliation and tie between Trust Indenture Act of 1939 (the “Trust Indenture Act”) and Indenture dated as of June 23, 2020. Trust Indenture Act Section Indenture Section §310(a)(1) 607 (a)(2) 607 (b) 608 §312(a) 701 (b) 702 (c) 702 §313(a) 703 (b)(2) 703 (c) 703 (

June 22, 2020 8-K

Entry into a Material Definitive Agreement, Financial Statements and Exhibits

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): June 16, 2020 NBT BANCORP INC. (Exact name of registrant as specified in its charter) Delaware 000-14703 16-1268674 (State or other jurisdiction of incorporation or organization) (Com

June 22, 2020 EX-1.1

$100,000,000 NBT Bancorp Inc. 5.000% Fixed-to-Floating Rate Subordinated Notes due July 1, 2030 UNDERWRITING AGREEMENT

Exhibit 1.1 $100,000,000 NBT Bancorp Inc. 5.000% Fixed-to-Floating Rate Subordinated Notes due July 1, 2030 UNDERWRITING AGREEMENT June 16, 2020 KEEFE, BRUYETTE & WOODS, INC. 787 Seventh Avenue, 4th Floor New York, New York 10019 As representative of the Underwriters listed in Schedule A hereto Ladies and Gentlemen: NBT Bancorp Inc., a Delaware corporation (the “Company”), proposes to issue and se

June 17, 2020 424B5

CALCULATION OF REGISTRATION FEE Title of Each Class of Securities To Be Registered Amount to be registered Proposed maximum offering price per security Proposed maximum aggregate offering price Amount of Registration Fee(1) 5.000% Fixed-to-Floating R

TABLE OF CONTENTS Filed Pursuant to Rule 424(b)(5) Registration No. 333-224532 CALCULATION OF REGISTRATION FEE Title of Each Class of Securities To Be Registered Amount to be registered Proposed maximum offering price per security Proposed maximum aggregate offering price Amount of Registration Fee(1) 5.000% Fixed-to-Floating Rate Subordinated Notes due 2030 $100,000,000 100% $100,000,000 $12,980

June 16, 2020 EX-99.1

EX-99.1

Exhibit 99.1

June 16, 2020 FWP

$100,000,000 5.000% Fixed-to-Floating Rate Subordinated Notes due 2030 Term Sheet

Filed pursuant to Rule 433 Issuer Free Writing Prospectus dated June 16, 2020 Registration No.

June 16, 2020 424B5

The information in this preliminary prospectus supplement is not complete and may be changed. A registration statement relating to the securities has been declared effective by the Securities and Exchange Commission. This preliminary prospectus suppl

TABLE OF CONTENTS Filed Pursuant to Rule 424(b)(5) Registration No. 333-224532 The information in this preliminary prospectus supplement is not complete and may be changed. A registration statement relating to the securities has been declared effective by the Securities and Exchange Commission. This preliminary prospectus supplement and the accompanying prospectus are not an offer to sell these se

June 16, 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): June 16, 2020 NBT BANCORP INC. (Exact name of registrant as specified in its charter) Delaware 000-14703 16-1268674 (State or other jurisdiction of incorporation or organization) (Com

June 1, 2020 8-K

Regulation FD Disclosure

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 NBT BANCORP INC. (Exact name of registrant as specified in its charter) Delaware 000-14703 16-1268674 (State or other jurisdiction of incorporation or organization) (Comm

May 20, 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): May 19, 2020 NBT BANCORP INC. (Exact name of registrant as specified in its charter) Delaware 000-14703 16-1268674 (State or other jurisdiction of incorporation or organization) (Comm

May 18, 2020 8-K

Regulation FD Disclosure

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 NBT BANCORP INC. (Exact name of registrant as specified in its charter) Delaware 000-14703 16-1268674 (State or other jurisdiction of incorporation or organization) (Comm

May 11, 2020 10-Q

Quarterly Report - 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D. C. 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 0-14703 NBT BANC

April 27, 2020 EX-99.1

NBT BANCORP INC. ANNOUNCES FIRST QUARTER NET INCOME OF $10.4 MILLION, OR $0.23 PER DILUTED COMMON SHARE

Exhibit 99.1 1 FOR IMMEDIATE RELEASE ATTENTION: FINANCIAL AND BUSINESS EDITORS Contact: John H. Watt, Jr., President and CEO John V. Moran, Executive Vice President and CFO NBT Bancorp Inc. 52 South Broad Street Norwich, NY 13815 607-337-6589 NBT BANCORP INC. ANNOUNCES FIRST QUARTER NET INCOME OF $10.4 MILLION, OR $0.23 PER DILUTED COMMON SHARE NORWICH, NY (April 27, 2020) – NBT Bancorp Inc. (“NBT

April 27, 2020 8-K

Financial Statements and Exhibits, Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): April 27, 2020 NBT BANCORP INC. (Exact name of registrant as specified in its charter) Delaware 000-14703 16-1268674 (State or other jurisdiction of incorporation or organization) (Co

April 9, 2020 DEFA14A

NBTB / NBT Bancorp, Inc. DEFA14A - - DEFA14A

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

April 9, 2020 DEF 14A

Schedule 14A

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 Registrant ☑ Filed by Party other than the Registrant ☐ Check the appropriate box: ☐ Preliminary Proxy Statement ☐ Confidential, for Use of the Commission Only (as permitted by Rule 14a-6(e)(2)) ☑ Definitive

March 23, 2020 8-K

Regulation FD Disclosure

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 23, 2020 NBT BANCORP INC. (Exact name of registrant as specified in its charter) Delaware 000-14703 16-1268674 (State or other jurisdiction of incorporation or organization) (Co

March 2, 2020 EX-10.18

Employment Agreement, dated December 19, 2016, by and between NBT Bancorp Inc. and Catherine M. Scarlett

EXHIBIT 10.18 EMPLOYMENT AGREEMENT This EMPLOYMENT AGREEMENT (the “Agreement”) is made and entered into as of December 19, 2016, by and between Catherine M. Scarlett (“Executive”) and NBT BANCORP INC., a Delaware corporation having its principal office in Norwich, New York (“NBTB”). W I T N E S S E T H : WHEREAS, Executive currently serves as Executive Vice President, Chief Human Resources Officer

March 2, 2020 EX-4.2

Description of Registrant’s Securities

EXHIBIT 4.2 DESCRIPTION OF THE REGISTRANT’S SECURITIES REGISTERED PURSUANT TO SECTION 12 OF THE SECURITIES EXCHANGE ACT OF 1934 As of December 31, 2019, NBT Bancorp, Inc. (the “Company”) had one class of securities, our common stock, par value $0.01 per share (“common stock”), registered under Section 12 of the Securities Exchange Act of 1934, as amended (the “Exchange Act”). The following descrip

March 2, 2020 EX-21

A list of the subsidiaries of the Registrant.

EXHIBIT 21 List of Subsidiaries of the Registrant Jurisdiction of Incorporation Names Under Which Subsidiary does Business NBT Bancorp Inc.

March 2, 2020 10-K

Annual Report - 10-K

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 .

March 2, 2020 EX-10.22

First Amendment to Transition and Retirement Agreement between NBT Bancorp Inc. and Michael J. Chewens dated November 5, 2019*

EXHIBIT 10.22 FIRST AMENDMENT TO TRANSITION AND RETIREMENT AGREEMENT This Amendment (this “First Amendment”) entered into as of November 5, 2019, by and between NBT Bancorp Inc., a Delaware corporation (“NBTB”), and Michael J. Chewens (“Executive”) (collectively, the “Parties”), amends the Transition and Retirement Agreement, made and entered into as of May 2, 2019, by and between the Parties (the

February 13, 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): February 12, 2020 NBT BANCORP INC. (Exact name of registrant as specified in its charter) Delaware 000-14703 16-1268674 (State or other jurisdiction of incorporation or organization)

February 13, 2020 EX-99.1

NBT’S TECHNOLOGY ROADMAP TRANSFORMING USER EXPERIENCE IN 2020 AND BEYOND

Exhibit 99.1 FOR IMMEDIATE RELEASE ATTENTION: FINANCIAL AND BUSINESS EDITORS CONTACTS: Joseph R. Stagliano Executive Vice President and President of Retail Community Banking 607.337.6239 / [email protected] Florence R. Doller Senior Vice President and Director of Corporate Communications 607.337.6118 / [email protected] NBT’S TECHNOLOGY ROADMAP TRANSFORMING USER EXPERIENCE IN 2020 AND BEYON

February 12, 2020 SC 13G/A

NBTB / NBT Bancorp, Inc. / VANGUARD GROUP INC - SCHEDULE 13G/A Passive Investment

SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Schedule 13G Under the Securities Exchange Act of 1934 (Amendment No.: 11)* Name of issuer: NBT Bancorp Inc Title of Class of Securities: Common Stock CUSIP Number: 628778102 Date of Event Which Requires Filing of this Statement: December 31, 2019 Check the appropriate box to designate the rule pursuant to which this Schedule is filed: ☒ Ru

February 12, 2020 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 12, 2020 NBT BANCORP INC. (Exact name of registrant as specified in its charter) Delaware 000-14703 16-1268674 (State or other jurisdiction of incorporation or organization)

January 27, 2020 8-K

Financial Statements and Exhibits, Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): January 27, 2020 NBT BANCORP INC. (Exact name of registrant as specified in its charter) Delaware 000-14703 16-1268674 (State or other jurisdiction of incorporation or organization) (

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