# EDGAR Filing Document

**Accession Number:** 0000790359
**File Stem:** 0001140361-26-002399
**Filing Date:** 2026-1
**Character Count:** 64411
**Document Hash:** a73c3a90c8544b588fbe2a1844784525
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0001140361-26-002399.hdr.sgml**: 20260126

**ACCESSION NUMBER**: 0001140361-26-002399

**CONFORMED SUBMISSION TYPE**: 8-K

**PUBLIC DOCUMENT COUNT**: 13

**CONFORMED PERIOD OF REPORT**: 20260126

**ITEM INFORMATION**: Results of Operations and Financial Condition

**ITEM INFORMATION**: Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers: Compensatory Arrangements of Certain Officers

**ITEM INFORMATION**: Financial Statements and Exhibits

**FILED AS OF DATE**: 20260126

**DATE AS OF CHANGE**: 20260126

**FILER**: 

**COMPANY DATA:**
- **COMPANY CONFORMED NAME:** NBT BANCORP INC
- **CENTRAL INDEX KEY:** 0000790359
- **STANDARD INDUSTRIAL CLASSIFICATION:** NATIONAL COMMERCIAL BANKS [6021]
- **ORGANIZATION NAME:** 02 Finance
- **EIN:** 161268674
- **STATE OF INCORPORATION:** DE
- **FISCAL YEAR END:** 1231

**FILING VALUES:**
- **FORM TYPE:** 8-K
- **SEC ACT:** 1934 Act
- **SEC FILE NUMBER:** 000-14703
- **FILM NUMBER:** 26560875

**BUSINESS ADDRESS:**
- **STREET 1:** 52 S BROAD ST
- **CITY:** NORWICH
- **STATE:** NY
- **ZIP:** 13815
- **BUSINESS PHONE:** 6073372265

**MAIL ADDRESS:**
- **STREET 1:** 52 S. BROAD STREET
- **CITY:** NORWICH
- **STATE:** NY
- **ZIP:** 13815

?xml version='1.0' encoding='ASCII'?

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### UNITED STATES

### SECURITIES AND EXCHANGE COMMISSION
**WASHINGTON, D.C. 20549**

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### FORM 8-K

#### 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, 2026

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## NBT BANCORP INC.
(Exact name of registrant as specified in its charter)

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| | | |
|:---|:---|:---|
| **Delaware**  | **000-14703**<br>| **16-1268674**<br>|
| (State or other jurisdiction of incorporation or organization) | (Commission File Number) | (I.R.S. Employer Identification No.) |

---

#### 52 South Broad Street, Norwich, New York 13815
(Address of principal executive offices) (Zip Code)

Registrant's telephone number, including area code: **(607) 337-2265**

#### Not Applicable
(Former name or former address, if changed since last report)

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions:

☐ Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425)

☐ Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12)

☐ Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b))

☐ Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))

Securities registered pursuant to Section 12(b) of the Act:

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| | | |
|:---|:---|:---|
| <u>Title of class</u> | <u>Trading Symbol</u> | <u>Name of exchange on which registered</u> |
| Common Stock, par value $0.01 per share<br>| NBTB<br>| The NASDAQ Stock Market LLC |

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Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (§230.405 of this chapter) or Rule 12b-2 of the Securities Exchange Act of 1934 (§240.12b-2 of this chapter).

Emerging growth company ☐

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. ☐

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| | |
|:---|:---|
| **Item 2.02** | **Results of Operations and Financial Condition** |

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On January 26, 2026, NBT Bancorp Inc. (the "Company") issued a press release describing its results of operations for the quarter ended December 31, 2025. That press release is furnished as Exhibit 99.1 hereto. A conference call will be held at 10:00 a.m. Eastern Time on Tuesday, January 27, 2026, to review the fourth quarter 2025 financial results. The audio webcast link, along with the corresponding presentation slides, will be available on the Event Calendar page of the Company's website at <u>www.nbtbancorp.com</u>.

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| | |
|:---|:---|
| **Item 5.02** | **Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers** |

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On January 26, 2026, Amy C. Wiles, Executive Vice President, Chief Credit Officer and Chief Risk Officer of the Company, notified the Company that she will step down from her aforementioned position effective May 21, 2026 and transition to a non-executive role. Ms. Wiles will serve as an employee of the Company in an advisory role until her retirement from employment in January of 2027. Since joining the Company in 2015, Ms. Wiles has provided over 10 years of leadership and has served as a valued member of the Company's Executive Management Team since 2017. Ms. Wiles' decision to transition to a non-executive role was not the result of any disagreements with the Company.

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| | |
|:---|:---|
| **Item 9.01** | **Financial Statements and Exhibits.** |

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&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(a) Not applicable.

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(b) Not applicable.

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(c) Not applicable.

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(d) Exhibits.

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| | |
|:---|:---|
| **Exhibit No.** | **Description** |
| [99.1](ef20063876_ex99-1.htm) | Press release of NBT Bancorp Inc. January 26, 2026 |
| 104 | Cover Page Interactive Data File (embedded within the Inline XBRL document) |

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#### SIGNATURE
Pursuant to the requirements of the Securities Exchange Act of 1934, the Registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized.

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| | | |
|:---|:---|:---|
|  | **NBT BANCORP INC.** | **NBT BANCORP INC.** |
| Date: January 26, 2026 | By: | <u>/s/ Annette L. Burns</u> |
|  |  | Annette L. Burns |
|  |  | Executive Vice President and Chief Financial Officer |

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## Exhibit 99.1

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#### Exhibit 99.1<br>

#### <br>

#### FOR IMMEDIATE RELEASE

#### ATTENTION: FINANCIAL AND BUSINESS EDITORS

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| | |
|:---|:---|
| 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 |

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#### NBT BANCORP INC. ANNOUNCES FULL YEAR 2025 RESULTS AND DECLARES CASH DIVIDEND

NORWICH, NY (January 26, 2026) – NBT Bancorp Inc. ("NBT" or the "Company") (NASDAQ: NBTB) reported net income and diluted earnings per share for the three and twelve months ended December 31, 2025.

Net income for the fourth quarter of 2025 was $55.5 million, or $1.06 per diluted common share, compared to $36.0 million, or $0.76 per diluted common share, for the fourth quarter of 2024, and $54.5 million, or $1.03 per diluted common share, for the third quarter of 2025. Operating diluted earnings per share<sup>(1)</sup>, a non-GAAP measure, was $1.05 for the fourth quarter of 2025, compared to $0.77 for the fourth quarter of 2024 and $1.05 for the third quarter of 2025.

Net income for the year ended December 31, 2025 was $169.2 million, or $3.33 per diluted common share, compared to $140.6 million, or $2.97 per diluted common share, in the prior year.

The Company completed the acquisition of Evans Bancorp, Inc. ("Evans") on May 2, 2025, adding 200 employees and 18 banking locations in Western New York, $1.67 billion in loans and $1.86 billion in deposits. In connection with the transaction, the Company issued 5.1 million shares of common stock, with a value of $221.8 million as of the closing date. The comparison to the fourth quarter of 2024 is significantly impacted by the Evans acquisition.

#### CEO Comments

"For the fourth quarter of 2025, we delivered another strong period of performance, generating operating earnings per share of $1.05 and reported return on average assets of 1.37%. We posted a solid return on average tangible common equity of 17.05% and achieved meaningful positive operating leverage," said NBT President and CEO Scott Kingsley. "By virtually all measures, 2025 was a successful year with strong execution by team members across the company resulting in record net revenues. We achieved a seamless integration with our Evans merger in May, adding a significant presence in the Western Region of New York along with 200 talented professionals. We also raised our dividend to shareholders by 8.8%, marking our thirteenth consecutive year of dividend increases. We are grateful for the collaborative and diligent work of our team members that consistently strengthens our company and enhances the value we deliver to our customers, communities and shareholders."

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2 **Fourth Quarter 2025 Financial Highlights**

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| | |
|:---|:---|
| Net Income | Net income was $55.5 million and diluted earnings per share was $1.06 |
|  | Operating net income was $55.4 million and operating diluted earnings per share was $1.05<sup>(1)</sup> |
| Net Interest Income <br> / NIM | Net interest income on a fully taxable equivalent ("FTE") basis was $136.0 million, an increase of $0.8 million from the prior quarter<sup>(1)</sup> |
| Net Interest Income <br> / NIM | Net interest margin ("NIM") on an FTE basis was 3.65%<sup>(1)</sup>, a decrease of 1 basis point ("bp") from the prior quarter |
|  | Earning asset yields of 5.08% were down 10 bps from the prior quarter |
|  | Total cost of funds of 1.51% was down 9 bps from the prior quarter |
|  | Included in FTE net interest income was $7.4 million of acquisition-related net accretion |
| Noninterest Income | Noninterest income was $49.6 million, or 27% of total revenues, excluding net securities gains (losses) |
| Loans and Credit<br> Quality | Period end loans increased $1.63 billion, or 16.3% from December 31, 2024 |
| Loans and Credit<br> Quality | Net charge-offs to average loans was 0.16% annualized |
| Loans and Credit<br> Quality | Nonperforming loans to total loans was 0.45% |
| Loans and Credit<br> Quality | Allowance for loan losses to total loans was 1.19% |
| Loans and Credit<br> Quality | Provision for loan losses was $3.8 million |
| Deposits | Deposits increased $1.95 billion, or 16.9%, from December 31, 2024 |
|  | Total cost of deposits was 1.44% for the fourth quarter of 2025, down 8 bps from the third quarter of 2025 |
| Capital | Stockholders' equity was $1.90 billion as of December 31, 2025 |
|  | Tangible book value per share<sup>(2)</sup> was $26.54 at December 31, 2025 an increase of 266 bps from December 31, 2024 |
|  | Tangible equity to assets of 8.95%<sup>(1)</sup> |
|  | CET1 ratio of 12.07%; Leverage ratio of 9.48% |

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#### <br>

#### Loans

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|:---|:---|
| ■ | Period end total loans were $11.60 billion at December 31, 2025, compared to $9.97 billion at December 31, 2024. |

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|:---|:---|
| ■ | Period end total loans increased $1.63 billion from December 31, 2024. Excluding the other consumer and residential solar portfolios, which are in a planned run-off status, and the loans acquired from Evans, period end loans increased $68.1 million, or 0.7%, from December 31, 2024. |

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#### Deposits

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|:---|:---|
| ■ | Total deposits at December 31, 2025 were $13.50 billion, compared to $11.55 billion at December 31, 2024 and $13.66 billion at September 30, 2025. Excluding the deposits acquired from Evans, deposits increased $88.4 million from December 31, 2024. Excluding deposits acquired from Evans, interest-bearing checking and money market accounts increased, partially offset by a decrease in time and savings deposits. |

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|:---|:---|
| ■ | The loan to deposit ratio was 85.9% at December 31, 2025, compared to 86.3% at December 31, 2024 and 84.9% at September 30, 2025. |

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#### Net Interest Income and Net Interest Margin

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| | |
|:---|:---|
| ■ | Net interest income for the fourth quarter of 2025 was $135.4 million, an increase of $0.8 million, or 0.6%, from the third quarter of 2025 and an increase of $29.3 million, or 27.6%, from the fourth quarter of 2024. The increase in net interest income from the third quarter of 2025 was driven by the increase in the average balance of earning assets and a decrease in funding costs more than offsetting the decline in earning asset yields. Three Federal Reserve interest rate cuts from September to December affected both earning asset yields and funding costs during the quarter. The increase in net interest income from the fourth quarter of 2024 resulted primarily from the improvement in net interest margin, the Evans acquisition and organic growth in interest-earning assets. |

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|:---|:---|
| ■ | The NIM on an FTE basis for the fourth quarter of 2025 was 3.65%, a decrease of 1 bp from the third quarter of 2025, as a decrease in earning asset yields were almost offset by a decrease in the cost of funds. In addition, the increase in the average balance of lower-yielding short-term interest-bearing accounts reduced NIM by 1 bp for the quarter. The NIM on an FTE basis increased 31 bps from the fourth quarter of 2024 due to higher yields on earning assets, including acquisition-related net accretion and a decrease in the cost of funds. |

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|:---|:---|
| ■ | Earning asset yields for the three months ended December 31, 2025 decreased 10 bps from the prior quarter to 5.08%. Loan yields for the three months ended December 31, 2025 decreased 10 bps from the prior quarter to 5.70% due to the Federal Reserve interest rate cuts partially offset by loans originating at higher rates than portfolio yields. Earning asset yields increased 12 bps from the same quarter in the prior year due to new loan yields that were priced higher than portfolio yields and higher levels of acquisition-related net accretion. Average earning assets increased $124.9 million, or 0.9%, from the third quarter of 2025 and grew $2.07 billion, or 16.2%, from the fourth quarter of 2024 due primarily to the addition of $1.95 billion in interest-earning assets acquired from Evans and organic earning asset growth. |

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|:---|:---|
| ■ | Total cost of deposits, including noninterest bearing deposits, was 1.44% for the fourth quarter of 2025, a decrease of 8 bps from the prior quarter primarily due to the decrease in the cost of time and money market deposits. Total cost of deposits decreased 16 bps from the same period in the prior year. |

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|:---|:---|
| ■ | Total cost of funds for the three months ended December 31, 2025 was 1.51%, a decrease of 9 bps from the prior quarter and a decrease of 20 bps from the fourth quarter of 2024. |

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#### Asset Quality and Allowance for Loan Losses

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|:---|:---|
| ■ | Net charge-offs to total average loans for the fourth quarter of 2025 was 16 bps compared to 15 bps in the prior quarter primarily due to an increase in both commercial and consumer net charge-offs. |

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|:---|:---|
| ■ | Nonperforming assets to total assets was 0.33% at December 31, 2025, unchanged from September 30, 2025 and down from 0.38% at December 31, 2024. |

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|:---|:---|
| ■ | Provision expense for the three months ended December 31, 2025 was $3.8 million, compared to $3.1 million for the third quarter of 2025. The increase in the provision for loan losses during the quarter was primarily due to a higher level of net charge-offs in the fourth quarter of 2025. |

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|:---|:---|
| ■ | The allowance for loan losses was $138.0 million, or 1.19% of total loans, at December 31, 2025, compared to $139.0 million, or 1.20% of total loans, at September 30, 2025 and compared to $116.0 million, or 1.16% of total loans, at December 31, 2024. The decrease in the allowance for loan losses in the fourth quarter of 2025 is primarily driven by a modest improvement in the economic forecast. The increase in the allowance for loan losses from the fourth quarter of 2024 was primarily due to the $20.7 million of allowance for acquired Evans loans. |

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|:---|:---|
| ■ | The reserve for unfunded loan commitments was $5.8 million at December 31, 2025, compared to $5.9 million at September 30, 2025 and compared to $4.4 million at December 31, 2024. The provision for unfunded loan commitments in the second quarter of 2025 included $0.5 million of acquisition-related provision for unfunded loan commitments. |

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#### Noninterest Income

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|:---|:---|
| ■ | Total noninterest income, excluding securities gains (losses), was $49.6 million for the three months ended December 31, 2025, down $1.8 million, or 3.6%, from the seasonally high third quarter of 2025, and up $7.4 million, or 17.4%, from the fourth quarter of 2024. |

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<br> ■ Service charges on deposit accounts were comparable to the prior quarter and higher than the fourth quarter of 2024 due primarily to the Evans acquisition and new account growth.

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|:---|:---|
| ■ | Retirement plan administration fees were down $1.8 million from the prior quarter and increased $1.2 million, or 9.1%, from the fourth quarter of 2024. The decrease from the prior quarter was expected due to higher seasonal activity-based fees in the third quarter. The increase from the fourth quarter of 2024 was driven by higher market values of assets under administration and the acquisition of a small third-party administrator in the fourth quarter of 2024. |

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|:---|:---|
| ■ | Wealth management fees increased $0.9 million, or 8.3%, from the prior quarter and increased $1.2 million, or 10.9%, from the fourth quarter of 2024. The increase from the prior quarter and the fourth quarter of 2024 reflects market performance, growth in new customer accounts and seasonal activity-based fees. |

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|:---|:---|
| ■ | Insurance revenues decreased $1.3 million from the prior quarter, which typically has comparatively higher levels of policy renewals than in the fourth quarter. |

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|:---|:---|
| ■ | Bank owned life insurance income increased compared to the fourth quarter of 2024 primarily due to $1.0 million in additional gains recognized. |

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|:---|:---|
| ■ | Other noninterest income increased $0.2 million from the prior quarter and $2.4 million from the fourth quarter of 2024. The increase from the prior quarter was driven by a $1.0 million gain on an equity investment. The third quarter included a $0.6 million gain related to the finalization of a third-party contractual arrangement. The increase from the fourth quarter of 2024 was driven by a $1.0 million gain on an equity investment and an increase in loan related fee income. |

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#### Noninterest Expense

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| | |
|:---|:---|
| ■ | Total noninterest expense was $111.7 million for the fourth quarter of 2025, compared to $111.1 million for the third quarter of 2025 and $100.8 million for the fourth quarter of 2024. Excluding acquisition expenses of $1.1 million in the third quarter of 2025 and $1.0 million in the fourth quarter of 2024, noninterest expense increased 1.5% compared to the previous quarter and was 11.9% higher than the fourth quarter of 2024. The increase was primarily due to the Evans acquisition and continued investments in our infrastructure. |

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|:---|:---|
| ■ | Salaries and benefits decreased 1.0% from the prior quarter with changes in incentive compensation and medical expenses. The increase from the fourth quarter of 2024 was driven by the impact of the Evans acquisition as NBT added 200 Evans employees in May, annual merit pay increases and higher medical expenses. |

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|:---|:---|
| ■ | Technology and data services increased $0.6 million from the prior quarter and $1.6 million from the fourth quarter of 2024 primarily due to the Evans acquisition, timing of planned activities and ongoing investment in enterprise technology initiatives. |

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|:---|:---|
| ■ | Occupancy costs were consistent with the prior quarter with a slight increase for seasonal maintenance. The $1.5 million increase from the fourth quarter of 2024 was driven by additional expenses from the Evans acquisition and higher facilities costs related to new branch banking locations. |

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|:---|:---|
| ■ | Professional fees and outside services were consistent with the prior quarter and increased $1.0 million from the fourth quarter of 2024 primarily due to the Evans acquisition and the timing of various initiatives. |

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|:---|:---|
| ■ | Amortization of intangible assets was consistent with the prior quarter and increased $1.3 million from the fourth quarter of 2024 primarily due to the amortization of intangible assets related to the Evans acquisition. |

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|:---|:---|
| ■ | Other expenses increased $1.4 million from the prior quarter and $2.3 million from the fourth quarter of 2024. The increase from the prior quarter was driven by higher levels of marketing, travel, training and charitable contributions. The increase from the fourth quarter of 2024 reflects the Evans acquisition including increased FDIC insurance expense, travel, training and charitable contributions. |

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#### Income Taxes

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|:---|:---|
| ■ | The effective tax rate for the fourth quarter of 2025 was 20.3%, which was down from 24.2% in the prior quarter and 20.9% for the fourth quarter of 2024. The decrease in the effective tax rate from the prior quarter was primarily due to the finalization of the assessment of the deductibility of merger-related expenses and the associated impact on the full year effective tax rate. |

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|:---|:---|
| ■ | The effective tax rate for the full year 2025 and 2024 were 22.9% and 21.6%, respectively. The increase in the effective tax rate from the prior year was primarily due to the higher level of pre-tax income and the impact of certain nondeductible acquisition expenses related to the Evans acquisition. |

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#### Capital

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|:---|:---|
| ■ | Tangible common equity to tangible assets<sup>(1)</sup> was 8.95% at December 31, 2025. Tangible book value per share<sup>(2)</sup> was $26.54 at December 31, 2025, increased 103 bps from $25.51 at September 30, 2025 and increased 266 bps from $23.88 at December 31, 2024. |

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|:---|:---|
| ■ | Stockholders' equity increased $370.1 million from December 31, 2024 driven by the Evans acquisition adding $221.8 million of capital, net income generation of $169.2 million and a $51.8 million decrease in accumulated other comprehensive loss reflecting the change in the fair value of securities available for sale, partially offset by dividends declared of $72.6 million and the repurchase of common stock of $10.2 million. |

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|:---|:---|
| ■ | As of December 31, 2025, CET1 capital ratio of 12.07%, leverage ratio of 9.48% and total risk-based capital ratio of 14.24%. |

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#### Dividend

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|:---|:---|
| ■ | The Board of Directors approved a first-quarter cash dividend of $0.37 per share at a meeting held earlier today. The dividend represents a $0.03 per share, or 8.8%, increase over the dividend paid in the first quarter of 2025. This is the Company's thirteenth consecutive year of annual dividend increases. The dividend will be paid on March 16, 2026 to stockholders of record as of March 2, 2026. |

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#### Stock Repurchase

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|:---|:---|
| ■ | On October 27, 2025, the Board of Directors authorized and approved an amendment to the Company's previously announced stock repurchase program. Pursuant to the amended stock repurchase program, the Company may repurchase up to 2,000,000 shares of the Company's common stock with all repurchases under the stock repurchase program to be made by December 31, 2027. |

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|:---|:---|
| ■ | The Company purchased 250,000 shares of its common stock during the fourth quarter of 2025, for a total of $10.2 million at an average price of $40.74 per share under its previously announced stock repurchase program. The Company may repurchase shares of its common stock from time to time to mitigate the potential dilutive effects of stock-based incentive plans and other potential uses of common stock for corporate purposes. As of December 31, 2025, there were 1,750,000 shares available for repurchase under this plan. |

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#### Conference Call and Webcast

The Company will host a conference call at 10:00 a.m. (Eastern) Tuesday, January 27, 2026, to review the fourth quarter 2025 financial results. The audio webcast link, along with the corresponding presentation slides, will be available on the Company's Event Calendar page at <u>www.nbtbancorp.com/bn/presentations-events.html#events</u> and will be archived for twelve months.

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#### Corporate Overview
NBT Bancorp Inc. is a financial holding company headquartered in Norwich, NY, with total assets of $16.00 billion at December 31, 2025. The Company primarily operates through NBT Bank, N.A., a full-service community bank, and through two financial services companies. NBT Bank, N.A. has 176 banking locations in New York, Pennsylvania, Vermont, Massachusetts, New Hampshire, Maine and Connecticut. EPIC Retirement Plan Services, based in Rochester, NY, is a national benefits administration firm. NBT Insurance Agency, LLC, based in Norwich, NY, is a full-service regional insurance agency. More information about NBT and its divisions is available online at: <u>www.nbtbancorp.com</u>, <u>www.nbtbank.com</u>, <u>www.epicrps.com</u> and <u>www.nbtbank.com/Insurance</u>.

#### Forward-Looking Statements
This press release contains forward-looking statements, as defined in the Private Securities Litigation Reform Act of 1995. These statements may be identified by the use of phrases such as "anticipate," "believe," "expect," "forecasts," "projects," "will," "can," "would," "should," "could," "may," or other similar terms. There are a number of factors, many of which are beyond the Company's control, that could cause actual results to differ materially from those contemplated by the forward-looking statements. Factors that may cause actual results to differ materially from those contemplated by such forward-looking statements include, among others, the following possibilities: (1) local, regional, national and international economic conditions, including actual or potential stress in the banking industry, and the impact they may have on the Company and its customers, and the Company's assessment of that impact; (2) changes in the level of nonperforming assets and charge-offs; (3) changes in estimates of future reserve requirements based upon the periodic review thereof under relevant regulatory and accounting requirements; (4) the effects of and changes in trade and monetary and fiscal policies and laws, including the interest rate policies of the Federal Reserve Board ("FRB") and international trade disputes (including threatened or implemented tariffs imposed by the U.S. and threatened or implemented tariffs imposed by foreign countries in retaliation); (5) inflation, interest rate, securities market and monetary fluctuations; (6) political instability; (7) acts of war, including international military conflicts, or terrorism; (8) the timely development and acceptance of new products and services and the perceived overall value of these products and services by users; (9) changes in consumer spending, borrowing and saving habits; (10) changes in the financial performance and/or condition of the Company's borrowers; (11) technological changes; (12) acquisition and integration of acquired businesses; (13) the ability to increase market share and control expenses; (14) changes in the competitive environment among financial holding companies; (15) the effect of changes in laws and regulations (including laws and regulations concerning taxes, banking, securities and insurance) with which the Company and its subsidiaries must comply, including those under the Dodd-Frank Act, and the Economic Growth, Regulatory Relief, and Consumer Protection Act of 2018; (16) the effect of changes in accounting policies and practices, as may be adopted by the regulatory agencies, as well as the Public Company Accounting Oversight Board, the Financial Accounting Standards Board and other accounting standard setters; (17) changes in the Company's organization, compensation and benefit plans; (18) the costs and effects of legal and regulatory developments, including the resolution of legal proceedings or regulatory or other governmental inquiries, and the results of regulatory examinations or reviews; (19) greater than expected costs or difficulties related to the integration of new products and lines of business; and (20) the Company's success at managing the risks involved in the foregoing items.

The Company cautions readers not to place undue reliance on any forward-looking statements, which speak only as of the date made, and advises readers that various factors, including, but not limited to, those described above and other factors discussed in the Company's annual and quarterly reports previously filed with the SEC, could affect the Company's financial performance and could cause the Company's actual results or circumstances for future periods to differ materially from those anticipated or projected.

Unless required by law, the Company does not undertake, and specifically disclaims any obligations to, publicly release any revisions that may be made to any forward-looking statements to reflect the occurrence of anticipated or unanticipated events or circumstances after the date of such statements.

#### Non-GAAP Measures
This press release contains financial information determined by methods other than in accordance with U.S. generally accepted accounting principles ("GAAP"). Where non-GAAP disclosures are used in this press release, the comparable GAAP measure, as well as a reconciliation to the comparable GAAP measure, is provided in the accompanying tables. Management believes that these non-GAAP measures provide useful information that is important to an understanding of the results of the Company's core business as well as provide information standard in the financial institution industry. Non-GAAP measures should not be considered a substitute for financial measures determined in accordance with GAAP and investors should consider the Company's performance and financial condition as reported under GAAP and all other relevant information when assessing the performance or financial condition of the Company. Amounts previously reported in the consolidated financial statements are reclassified whenever necessary to conform to current period presentation.

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| | | | | | |
|:---|:---|:---|:---|:---|:---|
| **NBT Bancorp Inc. and Subsidiaries** | | | | | |
| **Selected Financial Data** | | | | | |
| (unaudited, dollars in thousands except per share data) | (unaudited, dollars in thousands except per share data) |  |  |  |  |
|  | **2025** | **2025** | **2025** | **2025** | **2024** |
|  | **4th Q** | **3rd Q** | **2nd Q** | **1st Q** | **4th Q** |
| ***Profitability (reported)*** |  |  |  |  |  |
| Diluted earnings per share | $1.06 | $1.03 | $0.44 | $0.77 | $0.76 |
| Weighted average diluted common shares outstanding | **52524388** | 52642688 | 50787474 | 47477391 | 47505760 |
| Return on average assets<sup>(3)</sup> | 1.37<br>**%** | 1.35% | 0.59% | 1.08% | 1.04% |
| Return on average equity<sup>(3)</sup> | 11.81<br>**%** | 11.86% | 5.27% | 9.68% | 9.44% |
| Return on average tangible common equity<sup>(1)(3)</sup> | 17.05<br>**%** | 17.35% | 8.01% | 13.63% | 13.36% |
| Net interest margin<sup>(1)(3)</sup> | 3.65<br>**%** | 3.66% | 3.59% | 3.44% | 3.34% |
|  | **12 Months Ended December 31,** | **12 Months Ended December 31,** |  |  |  |
|  | **2025** | **2024** |  |  |  |
| ***Profitability (reported)*** |  |  |  |  |  |
| Diluted earnings per share | $3.33 | $2.97 |  |  |  |
| Weighted average diluted common shares outstanding | **50875220** | 47433174 |  |  |  |
| Return on average assets | 1.11<br>**%** | 1.04% |  |  |  |
| Return on average equity | 9.75<br>**%** | 9.57% |  |  |  |
| Return on average tangible common equity<sup>(1)</sup> | 14.14<br>**%** | 13.75% |  |  |  |
| Net interest margin<sup>(1)</sup> | 3.59<br>**%** | 3.23% |  |  |  |
|  | **2025** | **2025** | **2025** | **2025** | **2024** |
|  | **4th Q** | **3rd Q** | **2nd Q** | **1st Q** | **4th Q** |
| ***Profitability (operating)*** |  |  |  |  |  |
| Diluted earnings per share<sup>(1)</sup> | $1.05 | $1.05 | $0.88 | $0.80 | $0.77 |
| Return on average assets<sup>(1)(3)</sup> | 1.37<br>**%** | 1.37% | 1.19% | 1.11% | 1.06% |
| Return on average equity<sup>(1)(3)</sup> | 11.79<br>**%** | 12.05% | 10.52% | 9.95% | 9.60% |
| Return on average tangible common equity<sup>(1)(3)</sup> | 17.02<br>**%** | 17.61% | 15.25% | 13.99% | 13.57% |
|  | **12 Months Ended December 31,** | **12 Months Ended December 31,** |  |  |  |
|  | **2025** | **2024**  |  |  |  |
| ***Profitability (operating)*** |  |  |  |  |  |
| Diluted earnings per share<sup>(1)</sup> | $3.82 | $2.94 |  |  |  |
| Return on average assets<sup>(1)</sup> | 1.27<br>**%** | 1.03% |  |  |  |
| Return on average equity<sup>(1)</sup> | 11.21<br>**%** | 9.51% |  |  |  |
| Return on average tangible common equity<sup>(1)</sup> | 16.15<br>**%** | 13.66% |  |  |  |
|  | **2025** | **2025** | **2025** | **2025** | **2024** |
|  | **4th Q** | **3rd Q** | **2nd Q** | **1st Q** | **4th Q** |
| ***Balance sheet data*** |  |  |  |  |  |
| Short-term interest-bearing accounts | $**301958** | $394485 | $276786 | $37385 | $78973 |
| Securities available for sale | **1862838** | 1813194 | 1729428 | 1704677 | 1574664 |
| Securities held to maturity | **762756** | 771474 | 809664 | 836833 | 842921 |
| Net loans | **11460114** | 11456134 | 11484480 | 9863267 | 9853910 |
| Total assets | **15995121** | 16112584 | 16014781 | 13864251 | 13786666 |
| Total deposits | **13499193** | 13660918 | 13515232 | 11708511 | 11546761 |
| Total borrowings | **327422** | 319358 | 411376 | 312977 | 414983 |
| Total liabilities | **14098905** | 14259438 | 14209615 | 12298476 | 12260525 |
| Stockholders' equity | **1896216** | 1853146 | 1805166 | 1565775 | 1526141 |
| ***Capital*** |  |  |  |  |  |
| Equity to assets | 11.85<br>**%** | 11.50% | 11.27% | 11.29% | 11.07% |
| Tangible equity ratio<sup>(1)</sup> | 8.95<br>**%** | 8.58% | 8.30% | 8.68% | 8.42% |
| Book value per share | $36.32 | $35.33 | $34.46 | $33.13 | $32.34 |
| Tangible book value per share<sup>(2)</sup> | $26.54 | $25.51 | $24.57 | $24.74 | $23.88 |
| Leverage ratio | 9.48<br>**%** | 9.34% | 9.55% | 10.39% | 10.24% |
| Common equity tier 1 capital ratio | 12.07<br>**%** | 11.80% | 11.37% | 12.12% | 11.93% |
| Tier 1 capital ratio | 12.07<br>**%** | 11.80% | 11.37% | 13.02% | 12.83% |
| Total risk-based capital ratio | 14.24<br>**%** | 13.97% | 14.48% | 15.24% | 15.03% |
| Common stock price (end of period) | $41.52 | $41.76 | $41.55 | $42.90 | $47.76 |

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| | | | | | |
|:---|:---|:---|:---|:---|:---|
| **NBT Bancorp Inc. and Subsidiaries** | | | | | |
| **Asset Quality and Consolidated Loan Balances** | **Asset Quality and Consolidated Loan Balances** | | | | |
| (unaudited, dollars in thousands) |  |  |  |  |  |
|  | **2025** | **2025** | **2025** | **2025** | **2024** |
|  | **4th Q** | **3rd Q** | **2nd Q** | **1st Q** | **4th Q** |
| ***Asset quality*** |  |  |  |  |  |
| Nonaccrual loans | $**44592** | $46450 | $43181 | $44829 | $45819 |
| 90 days past due and still accruing | **7131** | 6966 | 3211 | 2862 | 5798 |
| Total nonperforming loans | **51723** | 53416 | 46392 | 47691 | 51617 |
| Other real estate owned | **402** | 267 | 345 | 308 | 182 |
| Total nonperforming assets | **52125** | 53683 | 46737 | 47999 | 51799 |
| Allowance for loan losses | **138000** | 139000 | 140200 | 117000 | 116000 |
| ***Asset quality ratios*** |  |  |  |  |  |
| Allowance for loan losses to total loans | 1.19<br>**%** | 1.20% | 1.21% | 1.17% | 1.16% |
| Total nonperforming loans to total loans | 0.45<br>**%** | 0.46% | 0.40% | 0.48% | 0.52% |
| Total nonperforming assets to total assets | 0.33<br>**%** | 0.33% | 0.29% | 0.35% | 0.38% |
| Allowance for loan losses to total nonperforming loans | 266.81<br>**%** | 260.22% | 302.21% | 245.33% | 224.73% |
| Past due loans to total loans<sup>(4)</sup> | 0.38<br>**%** | 0.38% | 0.38% | 0.32% | 0.34% |
| Net charge-offs to average loans<sup>(3)</sup> | 0.16<br>**%** | 0.15% | 0.09% | 0.27% | 0.23% |
|  | **2025** | **2025** | **2025** | **2025** | **2024** |
|  | **4th Q** | **3rd Q** | **2nd Q** | **1st Q** | **4th Q** |
| ***Loan net charge-offs by line of business*** |  |  |  |  |  |
| Commercial | $**1232** | $1047 | $97 | $2109 | $2542 |
| Residential mortgage and home equity | **(15)** | 18 | (27) | (25) | (25) |
| Indirect auto | **877** | 679 | 749 | 1155 | 675 |
| Residential solar and other consumer | **2671** | 2556 | 1542 | 3315 | 2517 |
| &nbsp;&nbsp;&nbsp; Total loan net charge-offs | $**4765** | $4300 | $2361 | $6554 | $5709 |
|  | **2025** | **2025** | **2025** | **2025** | **2024** |
|  | **4th Q** | **3rd Q** | **2nd Q** | **1st Q** | **4th Q** |
| ***Allowance for loan losses as a percentage of loans by segment*** | ***Allowance for loan losses as a percentage of loans by segment*** | ***Allowance for loan losses as a percentage of loans by segment*** | ***Allowance for loan losses as a percentage of loans by segment*** |  |  |
| Commercial & industrial | 0.76<br>**%** | 0.81% | 0.79% | 0.76% | 0.73% |
| Commercial real estate | 1.06<br>**%** | 1.13% | 1.14% | 1.02% | 0.95% |
| Residential mortgage | 1.06<br>**%** | 1.05% | 1.05% | 1.00% | 1.00% |
| Auto | 0.68<br>**%** | 0.70% | 0.70% | 0.72% | 0.81% |
| Residential solar and other consumer | 4.09<br>**%** | 3.62% | 3.64% | 3.61% | 3.64% |
| &nbsp;&nbsp;&nbsp; Total | 1.19<br>**%** | 1.20% | 1.21% | 1.17% | 1.16% |
|  | **2025** | **2025** | **2025** | **2025** | **2024** |
|  | **4th Q** | **3rd Q** | **2nd Q** | **1st Q** | **4th Q** |
| ***Loans by line of business*** |  |  |  |  |  |
| Commercial & industrial | $**1671974** | $1644218 | $1692335 | $1436990 | $1426482 |
| Commercial real estate | **4798957** | 4830761 | 4800494 | 3890115 | 3876698 |
| Residential mortgage | **2537593** | 2528565 | 2530344 | 2127588 | 2142249 |
| Home equity | **448113** | 435584 | 423355 | 331400 | 334268 |
| Indirect auto | **1340524** | 1327689 | 1319401 | 1309084 | 1273253 |
| Residential solar and other consumer | **800953** | 828317 | 858751 | 885090 | 916960 |
| &nbsp;&nbsp;&nbsp; Total loans | $**11598114** | $11595134 | $11624680 | $9980267 | $9969910 |

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| | | |
|:---|:---|:---|
| **NBT Bancorp Inc. and Subsidiaries** | | |
| **Consolidated Balance Sheets** | | |
| (unaudited, in thousands) |  |  |
|  | **December 31,** | **December 31,** |
|  | **2025** | **2024** |
| ***Assets*** |  |  |
| Cash and due from banks | $**185158** | $205083 |
| Short-term interest-bearing accounts | **301958** | 78973 |
| Equity securities, at fair value | **48760** | 42372 |
| Securities available for sale, at fair value | **1862838** | 1574664 |
| Securities held to maturity (fair value $702,577 and $749,945, respectively) | **762756** | 842921 |
| Federal Reserve and Federal Home Loan Bank stock | **44575** | 33957 |
| Loans held for sale | **1108** | 9744 |
| Loans | **11598114** | 9969910 |
| Less allowance for loan losses | **138000** | 116000 |
| &nbsp;&nbsp;&nbsp; Net loans | $**11460114** | $9853910 |
| Premises and equipment, net | **99277** | 80840 |
| Goodwill | **453278** | 362663 |
| Intangible assets, net | **57656** | 36360 |
| Bank owned life insurance | **317733** | 272657 |
| Other assets | **399910** | 392522 |
| &nbsp;&nbsp;&nbsp; **Total assets** | $**15995121** | $13786666 |
| ***Liabilities and stockholders' equity*** |  |  |
| Demand (noninterest bearing) | $**3800209** | $3446068 |
| Savings, interest-bearing checking and money market | **8206539** | 6658188 |
| Time | **1492445** | 1442505 |
| &nbsp;&nbsp;&nbsp; Total deposits | $**13499193** | $11546761 |
| Short-term borrowings | **148069** | 162942 |
| Long-term debt | **43176** | 29644 |
| Subordinated debt, net | **24509** | 121201 |
| Junior subordinated debt | **111668** | 101196 |
| Other liabilities | **272290** | 298781 |
| &nbsp;&nbsp;&nbsp; Total liabilities | $**14098905** | $12260525 |
| Total stockholders' equity | $**1896216** | $1526141 |
| &nbsp;&nbsp;&nbsp; **Total liabilities and stockholders' equity** | $**15995121** | $13786666 |

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| | | | | |
|:---|:---|:---|:---|:---|
| **NBT Bancorp Inc. and Subsidiaries** | | | | |
| **Consolidated Statements of Income** | | | | |
| (unaudited, in thousands except per share data) |  |  |  |  |
|  | **Three Months Ended** | **Three Months Ended** | **Twelve Months Ended** | **Twelve Months Ended** |
|  | **December 31,** | **December 31,** | **December 31,** | **December 31,** |
|  | **2025** | **2024** | **2025** | **2024** |
| ***Interest, fee and dividend income*** |  |  |  |  |
| Interest and fees on loans | $**166046** | $141103 | $**632311** | $552846 |
| Securities available for sale | **13081** | 8773 | **47015** | 31274 |
| Securities held to maturity | **4398** | 4931 | **18777** | 20466 |
| Other | **5019** | 2930 | **12889** | 7084 |
| &nbsp;&nbsp;&nbsp; Total interest, fee and dividend income | $**188544** | $157737 | $**710992** | $611670 |
| ***Interest expense*** |  |  |  |  |
| Deposits | $**49426** | $46815 | $**192334** | $186948 |
| Short-term borrowings | **915** | 918 | **3643** | 8669 |
| Long-term debt | **451** | 293 | **1463** | 1166 |
| Subordinated debt | **505** | 1816 | **4875** | 7232 |
| Junior subordinated debt | **1807** | 1790 | **7131** | 7533 |
| &nbsp;&nbsp;&nbsp; Total interest expense | $**53104** | $51632 | $**209446** | $211548 |
| Net interest income | $**135440** | $106105 | $**501546** | $400122 |
| Provision for loan losses | $**3765** | $2209 | $**19232** | $19607 |
| Provision for loan losses - acquisition day 1 non-PCD | **-** | - | **13022** | - |
| Total provision for loan losses | $**3765** | $2209 | $**32254** | $19607 |
| &nbsp;&nbsp;&nbsp; Net interest income after provision for loan losses | $**131675** | $103896 | $**469292** | $380515 |
| ***Noninterest income*** |  |  |  |  |
| Service charges on deposit accounts | $**5146** | $4411 | $**19067** | $17087 |
| Card services income | **6205** | 5652 | **23988** | 22331 |
| Retirement plan administration fees | **14104** | 12924 | **61585** | 56587 |
| Wealth management | **12028** | 10842 | **44755** | 41641 |
| Insurance services | **3917** | 3883 | **18035** | 17032 |
| Bank owned life insurance income | **3576** | 2271 | **12393** | 8325 |
| Net securities gains | **142** | 222 | **148** | 2789 |
| Other | **4586** | 2221 | **15522** | 11032 |
| &nbsp;&nbsp;&nbsp; Total noninterest income | $**49704** | $42426 | $**195493** | $176824 |
| ***Noninterest expense*** |  |  |  |  |
| Salaries and employee benefits | $**65993** | $61749 | $**257478** | $232487 |
| Technology and data services | **11803** | 10220 | **44025** | 39139 |
| Occupancy | **9267** | 7786 | **36385** | 31309 |
| Professional fees and outside services | **5826** | 4843 | **21740** | 19132 |
| Amortization of intangible assets | **3362** | 2080 | **11944** | 8443 |
| Reserve for unfunded loan commitments | **(100)** | (125) | **1375** | (705) |
| Acquisition expenses | **-** | 988 | **19526** | 1531 |
| Other | **15537** | 13234 | **52868** | 46545 |
| &nbsp;&nbsp;&nbsp; Total noninterest expense | $**111688** | $100775 | $**445341** | $377881 |
| Income before income tax expense | $**69691** | $45547 | $**219444** | $179458 |
| Income tax expense | **14182** | 9542 | **50209** | 38817 |
| &nbsp;&nbsp;&nbsp; **Net income** | $**55509** | $36005 | $**169235** | $140641 |
| ***Earnings Per Share*** |  |  |  |  |
| Basic | $1.06 | $0.76 | $3.34 | $2.98 |
| Diluted | $1.06 | $0.76 | $3.33 | $2.97 |

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| | | | | | |
|:---|:---|:---|:---|:---|:---|
| **NBT Bancorp Inc. and Subsidiaries** | | | | | |
| **Quarterly Consolidated Statements of Income** | **Quarterly Consolidated Statements of Income** | | | | |
| (unaudited, in thousands except per share data) | (unaudited, in thousands except per share data) |  |  |  |  |
|  | **2025** | **2025** | **2025** | **2025** | **2024** |
|  | **4th Q** | **3rd Q** | **2nd Q** | **1st Q** | **4th Q** |
| ***Interest, fee and dividend income*** |  |  |  |  |  |
| Interest and fees on loans | $**166046** | $169301 | $158912 | $138052 | $141103 |
| Securities available for sale | **13081** | 12063 | 11609 | 10262 | 8773 |
| Securities held to maturity | **4398** | 4595 | 4870 | 4914 | 4931 |
| Other | **5019** | 4508 | 2186 | 1176 | 2930 |
| &nbsp;&nbsp;&nbsp; Total interest, fee and dividend income | $**188544** | $190467 | $177577 | $154404 | $157737 |
| ***Interest expense*** |  |  |  |  |  |
| Deposits | $**49426** | $52101 | $48219 | $42588 | $46815 |
| Short-term borrowings | **915** | 816 | 1046 | 866 | 918 |
| Long-term debt | **451** | 450 | 296 | 266 | 293 |
| Subordinated debt | **505** | 547 | 2001 | 1822 | 1816 |
| Junior subordinated debt | **1807** | 1890 | 1795 | 1639 | 1790 |
| &nbsp;&nbsp;&nbsp; Total interest expense | $**53104** | $55804 | $53357 | $47181 | $51632 |
| Net interest income | $**135440** | $134663 | $124220 | $107223 | $106105 |
| Provision for loan losses | $**3765** | $3100 | $4813 | $7554 | $2209 |
| Provision for loan losses - acquisition day 1 non-PCD | **-** | - | 13022 | - | - |
| Total provision for loan losses | $**3765** | $3100 | $17835 | $7554 | $2209 |
| &nbsp;&nbsp;&nbsp; Net interest income after provision for loan losses | $**131675** | $131563 | $106385 | $99669 | $103896 |
| ***Noninterest income*** |  |  |  |  |  |
| Service charges on deposit accounts | $**5146** | $5100 | $4578 | $4243 | $4411 |
| Card services income | **6205** | 6389 | 6077 | 5317 | 5652 |
| Retirement plan administration fees | **14104** | 15913 | 15710 | 15858 | 12924 |
| Wealth management | **12028** | 11103 | 10678 | 10946 | 10842 |
| Insurance services | **3917** | 5260 | 4097 | 4761 | 3883 |
| Bank owned life insurance income | **3576** | 3240 | 2180 | 3397 | 2271 |
| Net securities gains (losses) | **142** | (2) | 112 | (104) | 222 |
| Other | **4586** | 4402 | 3500 | 3034 | 2221 |
| &nbsp;&nbsp;&nbsp; Total noninterest income | $**49704** | $51405 | $46932 | $47452 | $42426 |
| ***Noninterest expense*** |  |  |  |  |  |
| Salaries and employee benefits | $**65993** | $66636 | $64155 | $60694 | $61749 |
| Technology and data services | **11803** | 11180 | 10804 | 10238 | 10220 |
| Occupancy | **9267** | 9053 | 9038 | 9027 | 7786 |
| Professional fees and outside services | **5826** | 5941 | 5021 | 4952 | 4843 |
| Amortization of intangible assets | **3362** | 3429 | 3042 | 2111 | 2080 |
| Reserve for unfunded loan commitments | **(100)** | (317) | 1702 | 90 | (125) |
| Acquisition expenses | **-** | 1125 | 17180 | 1221 | 988 |
| Other | **15537** | 14096 | 11668 | 11567 | 13234 |
| &nbsp;&nbsp;&nbsp; Total noninterest expense | $**111688** | $111143 | $122610 | $99900 | $100775 |
| Income before income tax expense | $**69691** | $71825 | $30707 | $47221 | $45547 |
| Income tax expense | **14182** | 17354 | 8197 | 10476 | 9542 |
| &nbsp;&nbsp;&nbsp; **Net income** | $**55509** | $54471 | $22510 | $36745 | $36005 |
| ***Earnings Per Share*** |  |  |  |  |  |
| Basic | $1.06 | $1.04 | $0.45 | $0.78 | $0.76 |
| Diluted | $1.06 | $1.03 | $0.44 | $0.77 | $0.76 |

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| | | | | | | | | | | |
|:---|:---|:---|:---|:---|:---|:---|:---|:---|:---|:---|
| **NBT Bancorp Inc. and Subsidiaries** | **NBT Bancorp Inc. and Subsidiaries** | | | | | | | | | |
| **Average Quarterly Balance Sheets** | **Average Quarterly Balance Sheets** | | | | | | | | | |
| (unaudited, dollars in thousands) | (unaudited, dollars in thousands) |  |  |  |  |  |  |  |  |  |
|  | **Average Balance** | **Yield /** <br> **Rates** | **Average Balance** | **Yield / Rates** | **Average Balance** | **Yield / Rates** | **Average Balance** | **Yield / Rates** | **Average Balance** | **Yield / Rates** |
|  | **Q4 - 2025** | **Q4 - 2025** | **Q3 - 2025** | **Q3 - 2025** | **Q2 - 2025** | **Q2 - 2025** | **Q1 - 2025** | **Q1 - 2025** | **Q4 - 2024** | **Q4 - 2024** |
| ***Assets*** |  |  |  |  |  |  |  |  |  |  |
| Short-term interest-bearing accounts | $**450719** | 3.93<br>**%** | $338919 | 4.60% | $146640 | 4.61% | $63198 | 4.51% | $184988 | 5.27% |
| Securities taxable<sup>(1)</sup> | **2513465** | 2.55<br>**%** | 2464271 | 2.46% | 2486349 | 2.40% | 2402772 | 2.30% | 2317034 | 2.10% |
| Securities tax-exempt<sup>(1)(5)</sup> | **194638** | 3.48<br>**%** | 196728 | 3.48% | 221328 | 3.65% | 220210 | 3.60% | 211493 | 3.46% |
| FRB and FHLB stock | **44632** | 4.95<br>**%** | 42790 | 5.37% | 39176 | 5.12% | 33469 | 5.73% | 33261 | 5.75% |
| Loans<sup>(1)(6)</sup> | **11564950** | 5.70<br>**%** | 11600816 | 5.80% | 11064920 | 5.77% | 9981487 | 5.62% | 9957879 | 5.65% |
| &nbsp;&nbsp;&nbsp; Total interest-earning assets | $**14768404** | 5.08<br>**%** | $14643524 | 5.18% | $13958413 | 5.12% | $12701136 | 4.95% | $12704655 | 4.96% |
| Other assets | **1317791** |  | 1344775 |  | 1242690 |  | 1088069 |  | 1093419 |  |
| **Total assets** | $**16086195** |  | $15988299 |  | $15201103 |  | $13789205 |  | $13798074 |  |
| ***Liabilities and stockholders' equity*** | ***Liabilities and stockholders' equity*** |  |  |  |  |  |  |  |  |  |
| Money market deposits | $**4222137** | 2.78<br>**%** | $4077741 | 3.01% | $3808024 | 3.00% | $3496552 | 3.04% | $3504937 | 3.27% |
| Interest-bearing checking deposits | **2094105** | 1.14<br>**%** | 2059009 | 1.10% | 1902392 | 0.98% | 1682265 | 0.84% | 1664960 | 0.91% |
| Savings deposits | **1919032** | 0.42<br>**%** | 1947627 | 0.43% | 1852027 | 0.35% | 1571673 | 0.05% | 1561703 | 0.05% |
| Time deposits | **1533062** | 3.05<br>**%** | 1633647 | 3.26% | 1600908 | 3.37% | 1450846 | 3.55% | 1446798 | 3.85% |
| &nbsp;&nbsp;&nbsp; Total interest-bearing deposits | $**9768336** | 2.01<br>**%** | $9718024 | 2.13% | $9163351 | 2.11% | $8201336 | 2.11% | $8178398 | 2.28% |
| Federal funds purchased | **-** | **-** | - | **-** | 14231 | 4.51% | 2278 | 4.45% | - | - |
| Repurchase agreements | **137832** | 2.63<br>**%** | 123573 | 2.62% | 89957 | 2.52% | 107496 | 2.87% | 116408 | 3.13% |
| Short-term borrowings | **-** | **-** | 11 | 4.61% | 27845 | 4.62% | 7033 | 4.61% | 174 | 4.57% |
| Long-term debt | **44216** | 4.05<br>**%** | 44802 | 3.98% | 30705 | 3.87% | 27674 | 3.90% | 29657 | 3.93% |
| Subordinated debt, net | **24338** | 8.23<br>**%** | 27085 | 8.01% | 134684 | 5.96% | 121331 | 6.09% | 120967 | 5.97% |
| Junior subordinated debt | **111654** | 6.42<br>**%** | 111629 | 6.72% | 107948 | 6.67% | 101196 | 6.57% | 101196 | 7.04% |
| &nbsp;&nbsp;&nbsp; Total interest-bearing liabilities | $**10086376** | 2.09<br>**%** | $10025124 | 2.21% | $9568721 | 2.24% | $8568344 | 2.23% | $8546800 | 2.40% |
| Demand deposits | **3848626** |  | 3849288 |  | 3634517 |  | 3385080 |  | 3438194 |  |
| Other liabilities | **287158** |  | 292294 |  | 285357 |  | 296983 |  | 295292 |  |
| Stockholders' equity | **1864035** |  | 1821593 |  | 1712508 |  | 1538798 |  | 1517788 |  |
| **Total liabilities and stockholders' equity** | $**16086195** |  | $15988299 |  | $15201103 |  | $13789205 |  | $13798074 |  |
| Interest rate spread |  | 2.99<br>**%** |  | 2.97% |  | 2.88% |  | 2.72% |  | 2.56% |
| Net interest margin (FTE)<sup>(1)</sup> |  | 3.65<br>**%** |  | 3.66% |  | 3.59% |  | 3.44% |  | 3.34% |
| Total cost of deposits | $**13616962** | 1.44<br>**%** | $13567312 | 1.52% | $12797868 | 1.51% | $11586416 | 1.49% | $11616592 | 1.60% |
| Total cost of funds | **13935002** | 1.51<br>**%** | 13874412 | 1.60% | 13203238 | 1.62% | 11953424 | 1.60% | 11984994 | 1.71% |

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| | | | | | | |
|:---|:---|:---|:---|:---|:---|:---|
| **NBT Bancorp Inc. and Subsidiaries** | | | | | | |
| **Average Year-to-Date Balance Sheets** | | | | | | |
| (unaudited, dollars in thousands) |  |  |  |  |  |  |
|  | **Average** |  | **Yield/** | **Average** |  | **Yield/** |
|  | **Balance** | **Interest** | **Rates** | **Balance** | **Interest** | **Rates** |
| **Twelve Months Ended December 31,** | **2025** | **2025** | **2025** | **2024** | **2024** | **2024** |
| ***Assets*** |  |  |  |  |  |  |
| Short-term interest-bearing accounts | $**251174** | $**10779** | 4.29<br>**%** | $86213 | $4412 | 5.12% |
| Securities taxable<sup>(1)</sup> | **2467011** | **59944** | 2.43<br>**%** | 2285725 | 45588 | 1.99% |
| Securities tax-exempt<sup>(1)(5)</sup> | **208125** | **7403** | 3.56<br>**%** | 221273 | 7788 | 3.52% |
| FRB and FHLB stock | **40055** | **2110** | 5.27<br>**%** | 37789 | 2672 | 7.07% |
| Loans<sup>(1)(6)</sup> | **11058882** | **633222** | 5.73<br>**%** | 9818064 | 553784 | 5.64% |
| &nbsp;&nbsp;&nbsp; Total interest-earning assets | $**14025247** | $**713458** | 5.09<br>**%** | $12449064 | $614244 | 4.93% |
| Other assets | **1249225** |  |  | 1071455 |  |  |
| **Total assets** | $**15274472** |  |  | $13520519 |  |  |
| ***Liabilities and stockholders' equity*** |  |  |  |  |  |  |
| Money market deposits | $**3903585** | $**115197** | 2.95<br>**%** | $3308433 | $116982 | 3.54% |
| Interest-bearing checking deposits | **1935912** | **19840** | 1.02<br>**%** | 1617456 | 13442 | 0.83% |
| Savings deposits | **1823884** | **5942** | 0.33<br>**%** | 1580517 | 734 | 0.05% |
| Time deposits | **1555058** | **51355** | 3.30<br>**%** | 1408410 | 55790 | 3.96% |
| &nbsp;&nbsp;&nbsp; Total interest-bearing deposits | $**9218439** | $**192334** | 2.09<br>**%** | $7914816 | $186948 | 2.36% |
| Federal funds purchased | **4110** | **185** | 4.50<br>**%** | 13016 | 721 | 5.54% |
| Repurchase agreements | **114822** | **3057** | 2.66<br>**%** | 95879 | 2255 | 2.35% |
| Short-term borrowings | **8679** | **401** | 4.62<br>**%** | 103963 | 5693 | 5.48% |
| Long-term debt | **36916** | **1463** | 3.96<br>**%** | 29715 | 1166 | 3.92% |
| Subordinated debt, net | **76458** | **4875** | 6.38<br>**%** | 120420 | 7232 | 6.01% |
| Junior subordinated debt | **108145** | **7131** | 6.59<br>**%** | 101196 | 7533 | 7.44% |
| &nbsp;&nbsp;&nbsp; Total interest-bearing liabilities | $**9567569** | $**209446** | 2.19<br>**%** | $8379005 | $211548 | 2.52% |
| Demand deposits | **3681113** |  |  | 3377352 |  |  |
| Other liabilities | **290426** |  |  | 295301 |  |  |
| Stockholders' equity | **1735364** |  |  | 1468861 |  |  |
| **Total liabilities and stockholders' equity** | $**15274472** |  |  | $13520519 |  |  |
| &nbsp;&nbsp;&nbsp; Net interest income (FTE)<sup>(1)</sup> |  | $**504012** |  |  | $402696 |  |
| Interest rate spread |  |  | 2.90<br>**%** |  |  | 2.41% |
| Net interest margin (FTE)<sup>(1)</sup> |  |  | 3.59<br>**%** |  |  | 3.23% |
| Taxable equivalent adjustment |  | $**2466** |  |  | $2574 |  |
| Net interest income |  | $**501546** |  |  | $400122 |  |
| Total cost of deposits | $**12899552** | $**192334** | 1.49<br>**%** | $11292168 | $186948 | 1.66% |
| Total cost of funds | **13248682** | **209446** | 1.58<br>**%** | 11756357 | 211548 | 1.80% |

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<sup>(1)</sup> The following tables provide the Non-GAAP reconciliations for the Non-GAAP measures contained in this release:

---

| | | | | | | | | | | |
|:---|:---|:---|:---|:---|:---|:---|:---|:---|:---|:---|
| **Non-GAAP measures** | | | | | | | | | | |
| (unaudited, dollars in thousands except per share data) | (unaudited, dollars in thousands except per share data) | (unaudited, dollars in thousands except per share data) |  |  |  |  |  |  |  |  |
|  | **2025** | **2025** | **2025** | **2025** | **2025** | **2025** | **2025** | **2025** | **2024** | **2024** |
|  | **4th Q** | **4th Q** | **3rd Q** | **3rd Q** | **2nd Q** | **2nd Q** | **1st Q** | **1st Q** | **4th Q** | **4th Q** |
| ***Operating net income*** |  |  |  |  |  |  |  |  |  |  |
| Net income | **$** | **55509** | $| 54471 | $| 22510 | $| 36745 | $| 36005 |
| Acquisition expenses |  | **-** |  | 1125 |  | 17180 |  | 1221 |  | 988 |
| Acquisition-related provision for credit losses |  | **-** |  | - |  | 13022 |  | - |  | - |
| Acquisition-related reserve for unfunded loan commitments |  | **-** |  | - |  | 532 |  | - |  | - |
| Securities (gains) losses |  | **(142)** |  | 2 |  | (112) |  | 104 |  | (222) |
| Adjustments to net income | **$** | **(142)** | $| 1127 | $| 30622 | $| 1325 | $| 766 |
| Adjustments to net income (net of tax) | **$** | **(113)** | $| 851 | $| 22413 | $| 1020 | $| 604 |
| Operating net income | **$** | **55396** | $| 55322 | $| 44923 | $| 37765 | $| 36609 |
| Operating diluted earnings per share | **$** | 1.05 | $| 1.05 | $| 0.88 | $| 0.80 | $| 0.77 |
|  | **12 Months Ended December 31,**  | **12 Months Ended December 31,**  | **12 Months Ended December 31,**  | **12 Months Ended December 31,**  |  |  |  |  |  |  |
|  | **2025** | **2025** | **2024** | **2024** |  |  |  |  |  |  |
| ***Operating net income*** |  |  |  |  |  |  |  |  |  |  |
| Net income | **$** | **169235** | $| 140641 |  |  |  |  |  |  |
| Acquisition expenses |  | **19526** |  | 1531 |  |  |  |  |  |  |
| Acquisition-related provision for credit losses |  | **13022** |  | - |  |  |  |  |  |  |
| Acquisition-related reserve for unfunded loan commitments |  | **532** |  | - |  |  |  |  |  |  |
| Securities (gains) |  | **(148)** |  | (2789) |  |  |  |  |  |  |
| Adjustments to net income | **$** | **32932** | $| (1258) |  |  |  |  |  |  |
| Adjustments to net income (net of tax) | **$** | **25295** | $| (984) |  |  |  |  |  |  |
| Operating net income | **$** | **194530** | $| 139657 |  |  |  |  |  |  |
| Operating diluted earnings per share | **$** | 3.82 | $ | 2.94 |  |  |  |  |  |  |
|  | **2025** | **2025** | **2025** | **2025** | **2025** | **2025** | **2025** | **2025** | **2024** | **2024** |
|  | **4th Q** | **4th Q** | **3rd Q** | **3rd Q** | **2nd Q** | **2nd Q** | **1st Q** | **1st Q** | **4th Q** | **4th Q** |
| ***FTE adjustment*** |  |  |  |  |  |  |  |  |  |  |
| Net interest income | **$** | **135440** | $| 134663 | $| 124220 | $| 107223 | $| 106105 |
| Add: FTE adjustment |  | **581** |  | 594 |  | 655 |  | 636 |  | 619 |
| Net interest income (FTE) | **$** | **136021** | $| 135257 | $| 124875 | $| 107859 | $| 106724 |
| Average earning assets | **$** | **14768404** | $| 14643524 | $| 13958413 | $| 12701136 | $| 12704655 |
| Net interest margin (FTE)<sup>(3)</sup> |  | 3.65<br>**%** |  | 3.66% |  | 3.59% |  | 3.44% |  | 3.34% |
|  |  | **12 Months Ended December 31,&nbsp;&nbsp;&nbsp;&nbsp;**  | **12 Months Ended December 31,&nbsp;&nbsp;&nbsp;&nbsp;**  | **12 Months Ended December 31,&nbsp;&nbsp;&nbsp;&nbsp;**  |  |  |  |  |  |  |
|  |  | **2025** |  | **2024** |  |  |  |  |  |  |
| ***FTE adjustment*** |  |  |  |  |  |  |  |  |  |  |
| Net interest income | **$** | **501546** | $| 400122 |  |  |  |  |  |  |
| Add: FTE adjustment |  | **2466** |  | 2574 |  |  |  |  |  |  |
| Net interest income (FTE) | **$** | **504012** | $| 402696 |  |  |  |  |  |  |
| Average earning assets | **$** | **14025247** | $| 12449064 |  |  |  |  |  |  |
| Net interest margin (FTE) |  | 3.59<br>**%** |  | 3.23% |  |  |  |  |  |  |
| Interest income for tax-exempt securities and loans have been adjusted to an FTE basis using the statutory Federal income tax rate of 21%. | Interest income for tax-exempt securities and loans have been adjusted to an FTE basis using the statutory Federal income tax rate of 21%. | Interest income for tax-exempt securities and loans have been adjusted to an FTE basis using the statutory Federal income tax rate of 21%. | Interest income for tax-exempt securities and loans have been adjusted to an FTE basis using the statutory Federal income tax rate of 21%. | Interest income for tax-exempt securities and loans have been adjusted to an FTE basis using the statutory Federal income tax rate of 21%. | Interest income for tax-exempt securities and loans have been adjusted to an FTE basis using the statutory Federal income tax rate of 21%. | Interest income for tax-exempt securities and loans have been adjusted to an FTE basis using the statutory Federal income tax rate of 21%. | Interest income for tax-exempt securities and loans have been adjusted to an FTE basis using the statutory Federal income tax rate of 21%. | Interest income for tax-exempt securities and loans have been adjusted to an FTE basis using the statutory Federal income tax rate of 21%. | Interest income for tax-exempt securities and loans have been adjusted to an FTE basis using the statutory Federal income tax rate of 21%. | Interest income for tax-exempt securities and loans have been adjusted to an FTE basis using the statutory Federal income tax rate of 21%. |

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<sup>(1)</sup> The following tables provide the Non-GAAP reconciliations for the Non-GAAP measures contained in this release:

---

| | | | | | |
|:---|:---|:---|:---|:---|:---|
| **Non-GAAP measures (continued)** | | | | | |
| (unaudited, dollars in thousands) |  |  |  |  |  |
|  | **2025** | **2025** | **2025** | **2025** | **2024** |
|  | **4th Q** | **3rd Q** | **2nd Q** | **1st Q** | **4th Q** |
| ***Tangible equity to tangible assets*** |  |  |  |  |  |
| Total equity | $**1896216** | $1853146 | $1805166 | $1565775 | $1526141 |
| Intangible assets | **510934** | 515090 | 518519 | 396912 | 399023 |
| Total assets | $**15995121** | $16112584 | $16014781 | $13864251 | $13786666 |
| Tangible equity to tangible assets | 8.95<br>**%** | 8.58% | 8.30% | 8.68% | 8.42% |
|  | **2025** | **2025** | **2025** | **2025** | **2024** |
|  | **4th Q** | **3rd Q** | **2nd Q** | **1st Q** | **4th Q** |
| ***Return on average tangible common equity*** | ***Return on average tangible common equity*** |  |  |  |  |
| Net income | $**55509** | $54471 | $22510 | $36745 | $36005 |
| Amortization of intangible assets (net of tax) | **2522** | 2572 | 2282 | 1583 | 1560 |
| Net income, excluding intangibles amortization | $**58031** | $57043 | $24792 | $38328 | $37565 |
| Average stockholders' equity | $**1864035** | $1821593 | $1712508 | $1538798 | $1517788 |
| Less: average goodwill and other intangibles | **513728** | 517271 | 471159 | 398233 | 399139 |
| Average tangible common equity | $**1350307** | $1304322 | $1241349 | $1140565 | $1118649 |
| Return on average tangible common equity<sup>(3)</sup> | 17.05<br>**%** | 17.35% | 8.01% | 13.63% | 13.36% |
|  | **12 Months Ended December 31,**  | **12 Months Ended December 31,**  |  |  |  |
|  | **2025** | **2024** |  |  |  |
| ***Return on average tangible common equity*** | ***Return on average tangible common equity*** |  |  |  |  |
| Net income | $**169235** | $140641 |  |  |  |
| Amortization of intangible assets (net of tax) | **8958** | 6332 |  |  |  |
| Net income, excluding intangibles amortization | $**178193** | $146973 |  |  |  |
| Average stockholders' equity | $**1735364** | $1468861 |  |  |  |
| Less: average goodwill and other intangibles | **475530** | 399989 |  |  |  |
| Average tangible common equity | $**1259834** | $1068872 |  |  |  |
| Return on average tangible common equity | 14.14<br>**%** | 13.75% |  |  |  |

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<sup>(2)</sup> Non-GAAP measure - Stockholders' equity less goodwill and intangible assets divided by common shares outstanding.

<sup>(3)</sup> Annualized.

<sup>(4)</sup> Total past due loans, defined as loans 30 days or more past due and in an accrual status.

<sup>(5)</sup> Securities are shown at average amortized cost.

<sup>(6)</sup> For purposes of these computations, nonaccrual loans and loans held for sale are included in the average loan balances outstanding.

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