UNITIL CORP
For the period ended Dec 31, 2025. Filed Feb 9, 2026.
View on SEC.govAbout this filing
A company's yearly report to the SEC, with audited financial statements. It is the fullest account a company gives of its business, its finances and the risks it sees.
FY2025 · Filed Feb 9, 2026
UTL$55.93-0.4%Stored close · as of Nov 10, 2026
Extracted filing text, with the paragraph anchors used by the comparison.
See the whole filing, with its images and exhibitsContents
Item 15. Exhibits and Financial Statement Schedules
(a) (1) and (2)—LIST OF FINANCIAL STATEMENTS AND FINANCIAL STATEMENT SCHEDULES
The following financial statements are included herein under Part II, Item 8, Financial Statements and Supplementary Data:
Consolidated Statements of Changes in Common Stock Equity for the years ended December 31, 2025, 2024 and 2023
Notes to Consolidated Financial Statements
All other schedules for which provision is made in the applicable accounting regulation of the Securities and Exchange Commission are not required under the related instructions, are not applicable, or information required is included in the financial statements or notes thereto and, therefore, have been omitted.
(3)—LIST OF EXHIBITS
| Exhibit Number | Description of Exhibit | Reference (1) |
| 2.1 (9) | Stock Purchase Agreement among Unitil Corporation, PHC Utilities, Inc., and Hearthstone Utilities, Inc. (d/b/a Hope Companies, Inc.) dated July 8, 2024 | Exhibit 2.1 to Form 8-K for July 8, 2024 (SEC File No. 1-8858) |
| 2.2 (9) | Stock Purchase Agreement between Unitil Corporation and Avangrid Enterprises, Inc. dated March 31, 2025 | Exhibit 2.1 to Form 8-K for March 31, 2025 (SEC File No. 1-8858) |
| 2.3 (7)(8) | Purchase and Sale Agreement between Unitil Corporation and Aquarion Water Authority, and, solely with respect to Section 9.25 and Section 9.26 thereof, South Central Connecticut Regional Water Authority. | Exhibit 2.1 to Form 8-K for May 6, 2025 (SEC File No. 1-8858) |
| 2.4 | Amendment No. 1 to Purchase and Sale Agreement, dated as of January 23, 2026, by and among Unitil Corporation, Aquarion Water Authority and South Central Connecticut Regional Water Authority. | Exhibit 2.1 to Form 8-K for January 23, 2026 (SEC File No. 1-8858) |
| 3.1 (P) | Articles of Incorporation of Unitil Corporation. | Exhibit 3.1 to Form S-14 Registration Statement No. 2-93769 dated October 12, 1984 |
| 3.2 (P) | Articles of Amendment to the Articles of Incorporation of Unitil Corporation filed on March 4, 1992. | Exhibit 3.2 to Form 10-K for 1991 (SEC File No. 1-8858) |
| 3.3 | Articles of Amendment to the Articles of Incorporation of Unitil Corporation filed on September 23, 2008. | Exhibit 3.3 to Form S-3/A Registration Statement No. 333-152823 dated November 25, 2008 |
| 3.4 | Articles of Amendment to the Articles of Incorporation of Unitil Corporation filed on April 27, 2011. | Exhibit 4.4 to Post-Effective Amendment No. 1 to Form S-3 Registration Statement No. 333-168394, dated January 28, 2014 |
| Exhibit Number | Description of Exhibit | Reference (1) |
|---|---|---|
| 3.5 | Fourth Amended and Restated By-Laws of Unitil Corporation. | Exhibit 3.1 to Form 8-K dated April 29, 2020 (SEC File No. 1-8858) |
| 4.1 | Twelfth Supplemental Indenture of Unitil Energy Systems, Inc., successor to Concord Electric Company, dated as of December 2, 2002, amending and restating the Concord Electric Company Indenture of Mortgage and Deed of Trust dated as of July 15, 1958. | Exhibit 4.1 to Form 10-K for 2002 (SEC File No. 1-8858) |
| 4.2 | Fitchburg Note Agreement dated January 15, 1999 for the 7.37% Notes due January 15, 2029. | Exhibit 4.25 to Form 10-K for 1999 (SEC File No. 1-8858) |
| 4.3 | Fitchburg Note Agreement dated June 1, 2001 for the 7.98% Notes due June 1, 2031. | Exhibit 4.6 to Form 10-Q for June 30, 2001 (SEC File No. 1-8858) |
| 4.4 | Fitchburg Note Agreement dated December 21, 2005 for the 5.90% Notes due December 15, 2030. | (2) |
| 4.5 | Thirteenth Supplemental Indenture of Unitil Energy Systems, Inc., dated as of September 26, 2006. | (2) |
| 4.6 | Northern Utilities Note Purchase Agreement, dated as of December 3, 2008, for the 6.95% Senior Notes, Series A due December 3, 2018 and the 7.72% Senior Notes, Series B due December 3, 2038. | Exhibit 4.1 to Form 8-K dated December 3, 2008 (SEC File No. 1-8858) |
| 4.7 | Fourteenth Supplemental Indenture of Unitil Energy Systems, Inc., dated as of March 2, 2010. | Exhibit 4.4 to Form 8-K dated March 2, 2010 (SEC File No. 1-8858) |
| 4.8 | Northern Utilities form of Note Purchase Agreement, dated as of October 15, 2014, for the 4.42% Senior Notes, due October 15, 2044. | Exhibit 4.1 to Form 8-K dated October 15, 2014 (SEC File No. 1-8858) |
| 4.9 | Northern Utilities form of Note issued pursuant to the Note Purchase Agreement, dated as of October 15, 2014, for the 4.42% Senior Notes, due October 15, 2044. | Exhibit 4.2 to Form 8-K dated October 15, 2014 (SEC File No. 1-8858) |
| 4.10 | Note Purchase Agreement dated August 1, 2016 by and among Unitil Corporation and the several purchasers named therein for the 3.70% Senior Notes, Series 2016, due August 1, 2026. | Exhibit 4.1 to Form 8-K dated August 1, 2016 (SEC File No. 1-8858) |
| 4.11 | 3.70% Senior Note, Series 2016, dated as of August 1, 2016 purchased by Metropolitan Life Insurance Company in the principal amount of $11,200,000. | Exhibit 4.2 to Form 8-K dated August 1, 2016 (SEC File No. 1-8858) |
| 4.12 | 3.70% Senior Note, Series 2016, dated as of August 1, 2016 purchased by Lincoln Benefit Life Company in the principal amount of $4,000,000. | Exhibit 4.3 to Form 8-K dated August 1, 2016 (SEC File No. 1-8858) |
| 4.13 | 3.70% Senior Note, Series 2016, dated as of August 1, 2016 purchased by Lincoln Benefit Life Company in the principal amount of $3,800,000. | Exhibit 4.4 to Form 8-K dated August 1, 2016 (SEC File No. 1-8858) |
| Exhibit Number | Description of Exhibit | Reference (1) |
| 4.14 | 3.70% Senior Note, Series 2016, dated as of August 1, 2016 purchased by Lincoln Benefit Life Company in the principal amount of $1,000,000. | Exhibit 4.5 to Form 8-K dated August 1, 2016 (SEC File No. 1-8858) |
| 4.15 | 3.70% Senior Note, Series 2016, dated as of August 1, 2016 purchased by United of Omaha Life Insurance Company in the principal amount of $5,000,000. | Exhibit 4.6 to Form 8-K dated August 1, 2016 (SEC File No. 1-8858) |
| 4.16 | 3.70% Senior Note, Series 2016, dated as of August 1, 2016 purchased by United of Omaha Life Insurance Company in the principal amount of $3,000,000. | Exhibit 4.7 to Form 8-K dated August 1, 2016 (SEC File No. 1-8858) |
| 4.17 | 3.70% Senior Note, Series 2016, dated as of August 1, 2016 purchased by Companion Life Insurance Company in the principal amount of $2,000,000. | Exhibit 4.8 to Form 8-K dated August 1, 2016 (SEC File No. 1-8858) |
| 4.18 | Note Purchase Agreement dated July 14, 2017 by and among Northern Utilities, Inc. and the several purchasers named therein for the 3.52% Senior Notes, Series 2017A, due November 1, 2027 and the 4.32% Senior Notes, Series 2017B, due November 1, 2047. | Exhibit 4.1 to Form 8-K dated July 14, 2017 (SEC File No. 1-8858) |
| 4.19 | Note Purchase Agreement dated July 14, 2017 by and among Fitchburg Gas and Electric Light Company and the several purchasers named therein for the 3.52% Senior Notes, Series 2017A, due November 1, 2027 and the 4.32% Senior Notes, Series 2017B, due November 1, 2047. | Exhibit 4.2 to Form 8-K dated July 14, 2017 (SEC File No. 1-8858) |
| 4.20 | Note Purchase Agreement dated July 14, 2017 by and among Granite State Gas Transmission, Inc. and the several purchasers named therein for the 3.72% Senior Notes, Series 2017A, due November 1, 2027. | Exhibit 4.3 to Form 8-K dated July 14, 2017 (SEC File No. 1-8858) |
| 4.21 (4) | 3.52% Senior Note, Series 2017A, due November 1, 2027, issued by Northern Utilities, Inc. to Great-West Life & Annuity Insurance Company. | Exhibit 4.2 to Form 8-K dated November 1, 2017 (SEC File No. 1-8858) |
| 4.22 (4) | 4.32% Senior Note, Series 2017B, due November 1, 2047, issued by Northern Utilities, Inc. to The Canada Life Insurance Company of Canada. | Exhibit 4.3 to Form 8-K dated November 1, 2017 (SEC File No. 1-8858) |
| 4.23 (4) | 3.52% Senior Note, Series 2017A, due November 1, 2027, issued by Fitchburg Gas and Electric Light Company to Great-West Life & Annuity Insurance Company. | Exhibit 4.5 to Form 8-K dated November 1, 2017 (SEC File No. 1-8858) |
| 4.24 (4) | 4.32% Senior Note, Series 2017B, due November 1, 2047, issued by Fitchburg Gas and Electric Light Company to The Great-West Life Assurance Company. | Exhibit 4.6 to Form 8-K dated November 1, 2017 (SEC File No. 1-8858) |
| 4.25 (4) | 3.72% Senior Note, Series 2017A, due November 1, 2027, issued by Granite State Gas Transmission, Inc. to Thrivent Financial for Lutherans. | Exhibit 4.8 to Form 8-K dated November 1, 2017 (SEC File No. 1-8858) |
| 4.26 | Bond Purchase Agreement dated November 30, 2018 by and among Unitil Energy Systems, Inc. and the several purchasers named therein for the $30,000,000 aggregate principal amount of first mortgage bonds, Series Q, due November 30, 2048. | Exhibit 4.1 to Form 8-K dated November 30, 2018 (SEC File No. 1-8858) |
| Exhibit Number | Description of Exhibit | Reference (1) |
| 4.27 | Fifteenth Supplemental Indenture dated November 29, 2018 by and between Unitil Energy Systems, Inc. and U.S. Bank National Association (as trustee). | Exhibit 4.2 to Form 8-K dated November 30, 2018 (SEC File No. 1-8858) |
| 4.28 (4) | First Mortgage Bond, Series Q, 4.18%, due November 30, 2048, issued by Unitil Energy Systems, Inc. to United of Omaha Life Insurance Company. | Exhibit 4.3 to Form 8-K dated November 30, 2018 (SEC File No. 1-8858) |
| 4.29 | Note Purchase Agreement dated September 12, 2019 by and among Northern Utilities, Inc. and the several purchasers named therein. | Exhibit 4.1 to Form 8-K dated September 12, 2019 (SEC File No. 1-8858) |
| 4.30 (4) | 4.04% Senior Note, Series 2019, due September 12, 2049, issued by Northern Utilities, Inc. to Pacific Life Insurance Company. | Exhibit 4.2 to Form 8-K dated September 12, 2019 (SEC File No. 1-8858) |
| 4.31 | Note Purchase Agreement dated December 18, 2019 by and among Unitil Corporation and the several purchasers named therein. | Exhibit 4.1 to Form 8-K dated December 18, 2019 (SEC File No. 1-8858) |
| 4.32 (4) | 3.43% Senior Note, Series 2019, due December 18, 2029, issued by Unitil Corporation to CHIMEFISH & CO, as nominee for American Equity Investment Life Insurance Company. | Exhibit 4.2 to Form 8-K dated December 18, 2019 (SEC File No. 1-8858) |
| 4.33 | Note Purchase Agreement dated September 15, 2020 by and among Northern Utilities, Inc. and the several purchasers named therein. | Exhibit 4.1 to Form 8-K dated September 15, 2020 (SEC File No. 1-8858) |
| 4.34 (4) | 3.78% Senior Note, Series 2020, due September 15, 2040, issued by Northern Utilities, Inc. to Metropolitan Life Insurance Company. | Exhibit 4.2 to Form 8-K dated September 15, 2020 (SEC File No. 1-8858) |
| 4.35 | Note Purchase Agreement dated September 15, 2020 by and among Fitchburg Gas and Electric Light Company and the several purchasers named therein. | Exhibit 4.3 to Form 8-K dated September 15, 2020 (SEC File No. 1-8858) |
| 4.36 (4) | 3.78% Senior Note, Series 2020A, due September 15, 2040, issued by Fitchburg Gas and Electric Light Company to Brighthouse Life Insurance Company of NY. | Exhibit 4.4 to Form 8-K dated September 15, 2020 (SEC File No. 1-8858) |
| 4.37 | Bond Purchase Agreement dated September 15, 2020 by and among Unitil Energy Systems, Inc., U.S. Bank National Association (as trustee), and the several purchasers named therein. | Exhibit 4.5 to Form 8-K dated September 15, 2020 (SEC File No. 1-8858) |
| 4.38 | Sixteenth Supplemental Indenture dated September 15, 2020 by and between Unitil Energy Systems, Inc. and U.S. Bank National Association (as trustee). | Exhibit 4.6 to Form 8-K dated September 15, 2020 (SEC File No. 1-8858) |
| 4.39 (4) | First Mortgage Bond, Series R, 3.58%, due September 15, 2040, issued by Unitil Energy Systems, Inc. to CUDD and CO (as nominee for Symetra Life Insurance Company). | Exhibit 4.7 to Form 8-K dated September 15, 2020 (SEC File No. 1-8858) |
| Exhibit Number | Description of Exhibit | Reference (1) |
| 4.40 (5) | Bond Purchase Agreement dated August 21, 2024 by and among Unitil Energy Systems, Inc., U.S. Bank Trust Company, National Association (as trustee) and the several purchasers named therein. | Exhibit 4.11 to Form 8-K for August 21, 2024 (SEC File No. 1-8858) |
| 4.41 | Seventeenth Supplemental Indenture dated August 21, 2024 by and between Unitil Energy Systems, Inc. and U.S. Bank Trust Company, National Association (as trustee) | Exhibit 4.12 to Form 8-K for August 21, 2024 (SEC File No. 1-8858) |
| 4.42 (4) | First Mortgage Bond, Series S, 5.69%, due August 21, 2054, issued by Unitil Energy Systems, Inc. to Metlife Reinsurance Company of Hamilton, Ltd. | Exhibit 4.13 to Form 8-K for August 21, 2024 (SEC File No. 1-8858) |
| 4.43 (5) | Note Purchase Agreement dated July 6, 2023 by and among Fitchburg Gas and Electric Light Company and the several purchasers named therein. | Exhibit 4.1 to Form 8-K dated July 6, 2023 (SEC File No. 1-8858) |
| 4.44 (4) | 5.70% Senior Note, Series 2023A, due July 2, 2033, issued by Fitchburg Gas and Electric Light Company to MetLife Reinsurance Company of Hamilton, Ltd. | Exhibit 4.2 to Form 8-K dated July 6, 2023 (SEC File No. 1-8858) |
| 4.45 (4) | 5.96% Senior Note, Series 2023B, due July 2, 2053, issued by Fitchburg Gas and Electric Light Company to Mutual of Omaha Insurance Company | Exhibit 4.3 to Form 8-K dated July 6, 2023 (SEC File No. 1-8858) |
| 4.46 (5) | Note Purchase Agreement dated August 21, 2024 by and among Unitil Corporation and the several purchasers named therein. | Exhibit 4.1 to Form 8-K for August 21, 2024 (SEC File No. 1-8858) |
| 4.47 (4) | 5.99% Senior Note, Series 2024, due August 21, 2034, issued by Unitil Corporation to Metropolitan Tower Life Insurance Company | Exhibit 4.2 to Form 8-K for August 21, 2024 (SEC File No. 1-8858) |
| 4.48 (5) | Note Purchase Agreement dated August 21, 2024 by and among Northern Utilities, Inc. and the several purchasers named therein. | Exhibit 4.3 to Form 8-K for August 21, 2024 (SEC File No. 1-8858) |
| 4.49 (4) | 5.54% Senior Note, Series 2024A, due August 21, 2034, issued by Northern Utilities, Inc. to Metropolitan Life Insurance Company | Exhibit 4.4 to Form 8-K for August 21, 2024 (SEC File No. 1-8858) |
| 4.50 (4) | 5.74% Senior Note, Series 2024B, due August 21, 2039, issued by Northern Utilities, Inc.to Modern Woodmen of America. | Exhibit 4.5 to Form 8-K for August 21, 2024 (SEC File No. 1-8858) |
| 4.51 (5) | Note Purchase Agreement dated August 21, 2024 by and among Fitchburg Gas and Electric Light Company and the several purchasers named therein | Exhibit 4.6 to Form 8-K for August 21, 2024 (SEC File No. 1-8858) |
| 4.52 (4) | 5.54% Senior Note, Series 2024A, due August 21, 2034, issued by Fitchburg Gas and Electric Light Company to Metlife Reinsurance Company of Hamilton, Ltd. | Exhibit 4.7 to Form 8-K for August 21, 2024 (SEC File No. 1-8858) |
| 4.53 (4) | 5.99% Senior Note, Series 2024B, due August 21, 2044, issued by Fitchburg Gas and Electric Light Company to Metlife Reinsurance Company of Hamilton, Ltd. | Exhibit 4.8 to Form 8-K for August 21, 2024 (SEC File No. 1-8858) |
| Exhibit Number | Description of Exhibit | Reference (1) |
| 4.54 (5) | Note Purchase Agreement dated August 21, 2024 by and among Granite State Gas Transmission, Inc. and the several purchasers named therein. | Exhibit 4.9 to Form 8-K for August 21, 2024 (SEC File No. 1-8858) |
| 4.55 (4) | 5.74% Senior Note, Series 2024, due August 21, 2034, issued by Granite State Gas Transmission, Inc. to Metropolitan Life Insurance Company | Exhibit 4.10 to Form 8-K for August 21, 2024 (SEC File No. 1-8858) |
| 4.56 | Amended and Restated Note issued to Bank of America, N.A. | Exhibit 4.2 to Form 8-K dated July 25, 2018 (SEC File No. 1-8858) |
| 4.57 | Loan Agreement dated December 18, 2020 between Unitil Realty Corp. and TD Bank, N.A. | Exhibit 4.48 to Form 10-K for 2020 (SEC File No. 1-8858) |
| 4.58 | Mortgage and Security Agreement dated December 18, 2020 between Unitil Realty Corp. and TD Bank, N.A. | Exhibit 4.49 to Form 10-K for 2020 (SEC File No. 1-8858) |
| 4.59 | Mortgage Loan Note dated December 18, 2020 issued to TD Bank, N.A. | Exhibit 4.50 to Form 10-K for 2020 (SEC File No. 1-8858) |
| 4.61 (5) | Third Amended and Restated Credit Agreement dated September 29, 2022 among Unitil Corporation, Bank of America, N.A., as administrative agent, and the Lenders | Exhibit 4.1 to Form 8-K dated September 29, 2022 (SEC File No. 1-8858) |
| 4.62 | First Amendment to Third Amended and Restated Credit Agreement between Unitil and Bank of America, N.A., as administrative agent, dated July 18, 2024 | Exhibit 4.1 to Form 8-K for July 18, 2024 (SEC File No. 1-8858) |
| 4.63 | Second Amended and Restated Note issued to Citizens Bank, N.A. | Exhibit 4.2 to Form 8-K dated September 29, 2022 (SEC File No. 1-8858) |
| 4.64 | Second Amended and Restated Note issued to TD Bank, N.A. | Exhibit 4.3 to Form 8-K dated September 29, 2022 (SEC File No. 1-8858) |
| 4.65 (5) | Second Amendment to Third Amended and Restated Credit Agreement dated January 29, 2025 among Unitil Corporation; Bank of America, N.A., as administrative agent; and Bank of America, N.A., Citizens Bank, N.A., and TD Bank, N.A. | Exhibit 4.1 to Form 8-K dated January 29, 2025 (SEC File No. 1-8858) |
| 4.66 | Third Amended and Restated Note issued to Citizens Bank, N.A. | Exhibit 4.2 to Form 8-K dated January 29, 2025 (SEC File No. 1-8858) |
| 4.67 | Third Amended and Restated Note issued to TD Bank, N.A. | Exhibit 4.3 to Form 8-K dated January 29, 2025 (SEC File No. 1-8858) |
| 4.68 (5)(8) | Note Purchase Agreement dated July 8, 2025 by and among Bangor Natural Gas Company and the several purchasers named therein. | Exhibit 4.1 to Form 8-K for July 8, 2025 (SEC File No. 1-8858) |
| Exhibit Number | Description of Exhibit | Reference (1) |
| 4.69 | 5.70% Senior Note, Series 2025A, due July 8, 2030, issued by Bangor Natural Gas Company to CoBank, ACB. | Exhibit 4.2 to Form 8-K for July 8, 2025 (SEC File No. 1-8858) |
| 4.70 | 6.31% Senior Note, Series 2025B, due July 8, 2035, issued by Bangor Natural Gas Company to United of Omaha Life Insurance Company. | Exhibit 4.3 to Form 8-K for July 8, 2025 (SEC File No. 1-8858) |
| 4.71 (5) | Credit Agreement dated October 31, 2025 among Unitil Corporation, The Bank of Nova Scotia, as agent, and The Bank of Nova Scotia, as lender | Exhibit 4.1 to Form 8-K for October 31, 2025 (SEC File No. 1-8858) |
| 10.1 (3) | Amended and Restated Form of Severance Agreement between the Company and the persons listed at the end of such Agreement. | Exhibit 10.2 to Form 8-K dated June 19, 2008 (SEC File No. 1-8858) |
| 10.2 (3) | Amended and Restated Form of Severance Agreement between the Company and the persons listed at the end of such Agreement. | Exhibit 10.3 to Form 8-K dated June 19, 2008 (SEC File No. 1-8858) |
| 10.3 (3) | Amended and Restated Form of Severance Agreement (Three-Year Term). | Exhibit 10.1 to Form 8-K dated July 25, 2018 (SEC File No. 1-8858) |
| 10.4 (3) | Amended and Restated Form of Severance Agreement (Two-Year Term). | Exhibit 10.2 to Form 8-K dated July 25, 2018 (SEC File No. 1-8858) |
| 10.5 (3) | Amended and Restated Form of Severance Agreement (Two-Year Term; Non Pension). | Exhibit 10.3 to Form 8-K dated July 25, 2018 (SEC File No. 1-8858) |
| 10.6 (3) | Severance Agreement dated March 23, 2020, between the Company and Daniel J. Hurstak. | Exhibit 10.1 to Form 8-K dated March 19, 2020 (SEC File No. 1-8858) |
| 10.7 (3) | Severance Agreement dated July 29, 2020, between the Company and Robert B. Hevert. | Exhibit 10.1 to Form 8-K dated July 29, 2020 (SEC File No. 1-8858) |
| 10.8 (3) | Amended and Restated Unitil Corporation Supplemental Executive Retirement Plan effective as of December 31, 2016. | Exhibit 10.1 to Form 10-Q for March 31, 2017 (SEC File No. 1-8858) |
| 10.9 (3) | Amended and Restated Supplemental Executive Retirement Plan. | Exhibit 10.5 to Form 8-K dated July 25, 2018 (SEC File No. 1-8858) |
| 10.10 (3) | Unitil Corporation Deferred Compensation Plan. | Exhibit 10.6 to Form 8-K dated July 25, 2018 (SEC File No. 1-8858) |
| 10.11 (3) | Unitil Corporation Management Incentive Plan (amended and restated as of June 5, 2013). | Exhibit 10.2 to Form 8-K dated June 5, 2013 (SEC File No. 1-8858) |
| Exhibit Number | Description of Exhibit | Reference (1) |
| 10.12 (3) | Unitil Corporation Second Amended and Restated 2003 Stock Plan. | Appendix 1 to the Proxy Statement filed on Schedule 14A dated March 13, 2012 (SEC File No. 1-8858) |
| 10.13 (3) | Unitil Corporation Third Amended and Restated 2003 Stock Plan. | Exhibit 10.1 to Form 10-Q for March 31, 2024 (SEC File No. 1-8858) |
| 10.14 (3) | Form of Restricted Stock Unit Agreement under the Unitil Corporation Second Amended and Restated 2003 Stock Plan. | Exhibit 4.7 to Form S-8 Registration Statement No. 333-184849 dated November 9, 2012 |
| 10.15 (3) | Form of Restricted Stock Agreement under the Unitil Corporation Second Amended and Restated 2003 Stock Plan. | Exhibit 4.8 to Form S-8 Registration Statement No. 333-184849 dated November 9, 2012 |
| 10.16 (3) | Unitil Corporation Tax Deferred Savings and Investment Plan, as amended and restated effective as of January 1, 2021. | Exhibit 10.15 to Form 10-K for 2021 (SEC File No. 1-8858) |
| 10.17 (3) | Unitil Corporation Tax Deferred Savings and Investment Plan Trust Agreement. | Exhibit 4.2 to Form S-8 Registration Statement No. 333-234391 dated October 31, 2019 |
| 10.18 (3) | Unitil Corporation Incentive Plan (amended and restated as of January 26, 2015). | Exhibit 10.1 to Form 10-Q for March 31, 2015 (SEC File No. 1-8858) |
| 10.19 (3) | Employment Agreement between Unitil Corporation and Thomas P. Meissner, Jr. | Exhibit 10.1 to Form 8-K for May 1, 2024 (SEC File No. 1-8858) |
| 10.20 (3) | Unitil Corporation - Compensation of Directors effective as of January 1, 2025 | Exhibit 10.23 to Form 10-K for 2024 (SEC File No. 1-8858) |
| 10.21 | Underwriting Agreement dated August 4, 2021 among Unitil Corporation, on the one hand, and RBC Capital Markets, LLC and BofA Securities, Inc., on the other hand, for themselves and as representatives of the several underwriters named therein. | Exhibit 1.1 to Form 8-K dated August 3, 2021 (File No. 1-8858) |
| 10.22 (3) | Form of Restricted Stock Agreement (Time Vesting) | Exhibit 10.1 to Form 8-K dated January 24, 2023 (SEC File No. 1-8858) |
| 10.23 (3) | Form of Restricted Stock Agreement (Performance Vesting) | Exhibit 10.2 to Form 8-K dated January 24, 2023 (SEC File No. 1-8858) |
| 10.24 (5) | Transition Services Agreement dated January 31, 2025 between Bangor Natural Gas Company and Hearthstone Holdings, Inc. (d/b/a Hope Utilities, Inc.), acknowledged by Unitil Corporation | Exhibit 10.2 to Form 8-K dated January 29, 2025 (SEC File No. 1-8858) |
| 10.25 | Guaranty between Unitil Corporation and Avangrid Networks, Inc., dated March 31. 2025 | Exhibit 10.3 to Form 10-Q for March 31, 2025 (SEC File No. 1-8858) |
| Exhibit Number | Description of Exhibit | Reference (1) |
| 10.26 (6) | Debt Commitment Letter between Unitil Corporation and The Bank of Nova Scotia, dated March 31, 2025 | Exhibit 10.4 to Form 10-Q for March 31, 2015 (SEC File No. 1-8858) |
| 10.27 | Distribution Agreement, dated June 3, 2025, by and among Unitil Corporation, Janney Montgomery Scott LLC and Scotia Capital (USA) Inc. (each as agent and/or forward seller) and Janney Montgomery Scott LLC and The Bank of Nova Scotia (each as forward purchaser). | Exhibit 10.1 to Form 8-K for June 3, 2025 (SEC File No. 1-8858) |
| 10.28 | Underwriting Agreement, August 14, 2025, by and among Unitil Corporation and Wells Fargo Securities, LLC, Scotia Capital (USA) Inc. and Janney Montgomery Scott LLC. | Exhibit 1.1 to Form 8-K for August 14, 2025 (SEC File No. 1-8858) |
| 10.29 (5) | Transition Services Agreement dated October 31, 2025 between Maine Natural Gas Company and Avangrid Service Company, as consented to and acknowledged by Unitil Corporation | Exhibit 10.2 to Form 8-K for October 31, 2025 (SEC File No. 1-8858) |
| 19.1 | Unitil Corporation Corporate Governance Guidelines and Policies of the Board of Directors (includes the Registrant’s insider trading policies and procedures) | Exhibit 19.1 to Form 10-K for 2023 (SEC File No. 1-8858) |
| 21.1 | Statement Re: Subsidiaries of Registrant. | Filed herewith |
| 23.1 | Consent of Independent Registered Public Accounting Firm. | Filed herewith |
| 31.1 | Certification of Chief Executive Officer Pursuant to Rule 13a-14 of the Exchange Act, as Adopted Pursuant to Section 302 of the Sarbanes-Oxley Act of 2002. | Filed herewith |
| 31.2 | Certification of Chief Financial Officer Pursuant to Rule 13a-14 of the Exchange Act, as Adopted Pursuant to Section 302 of the Sarbanes-Oxley Act of 2002. | Filed herewith |
| 31.3 | Certification of Chief Accounting Officer Pursuant to Rule 13a-14 of the Exchange Act, as Adopted Pursuant to Section 302 of the Sarbanes-Oxley Act of 2002. | Filed herewith |
| 32.1 | Certifications of Chief Executive Officer, Chief Financial Officer and Chief Accounting Officer Pursuant to 18 U.S.C. Section 1350, as Adopted Pursuant to Section 906 of the Sarbanes-Oxley Act of 2002. | Filed herewith |
| 99.1 | Unitil Corporation Press Release Dated February 9, 2026 Announcing Earnings For the Year Ended December 31, 2025. | Furnished herewith |
| 101.INS | Inline XBRL Instance Document – The instance document does not appear in the Interactive Data File because its XBRL tags are embedded within the Inline XBRL document. | Filed herewith |
| Exhibit Number | Description of Exhibit | Reference (1) |
| 101.SCH | Inline XBRL Taxonomy Extension Schema With Embedded Linkbase Documents. | Filed herewith |
| 104 | Cover Page Interactive Data File – The cover page interactive data file does not appear in the interactive data file because its XBRL tags are embedded within the inline XBRL document. | Filed herewith |
(1) The exhibits referred to in this column by specific designations and dates have heretofore been filed with or furnished to the Securities and Exchange Commission under such designations and are hereby incorporated by reference.
(2) In accordance with Item 601(b)(4)(iii)(A) of Regulation S-K, the instrument defining the debt of the Registrant and its subsidiary, described above, has been omitted but will be furnished to the Commission upon request.
(3) These exhibits represent a management contract or compensatory plan.
(4) This Note or Bond (each, an “Instrument”) is substantially identical in all material respects to other Instruments that are otherwise required to be filed as exhibits, except as to the registered payee of such Instrument, the identifying number of such Instrument, and the principal amount of such Instrument. In accordance with instruction no. 2 to Item 601 of Regulation S-K, the registrant has filed a copy of only one of such Instruments, with a schedule identifying the other Instruments omitted and setting forth the material details in which such Instruments differ from the Instrument that was filed. The registrant acknowledges that the Securities and Exchange Commission may at any time in its discretion require filing of copies of any Instruments so omitted.
(5) In accordance with Item 601(a)(5) of Regulation S-K, this exhibit omits certain of its schedules and exhibits. This exhibit’s table of contents, or the cover page of its omitted schedules and exhibits, includes a brief description of the subject matter of all of its omitted schedules and exhibits. The Registrant acknowledges that it must provide a copy of any omitted schedules or exhibits to the Securities and Exchange Commission or its staff upon request.
(6) In accordance with Item 601(a)(5) of Regulation S-K, this exhibit omits certain of its schedules and exhibits. These schedules and exhibits consist of Annex I to Exhibit B (Interest), which describes the interest rates applicable to the loan facility. The Registrant acknowledges that it must provide a copy of any omitted schedules or exhibits to the Securities and Exchange Commission or its staff upon request.
(7) Certain schedules and exhibits to the Purchase and Sale Agreement have been omitted pursuant to Item 601(a)(5) of Regulation S-K. These schedules and exhibits consist of (i) the Seller Disclosure Schedule (as such term is defined in the Purchase and Sale Agreement) and (ii) the Operating Agreement (as such term is defined in the Purchase and Sale Agreement). Unitil Corporation hereby undertakes to furnish supplementally copies of any of the omitted schedules and exhibits upon request by the Securities and Exchange Commission or its staff.
(8) Certain information has been excluded from this exhibit pursuant to Item 601(b)(2)(ii) of Regulation S-K.
(9) Certain schedules and exhibits to the Stock Purchase Agreement have been omitted pursuant to Item 601(a)(5) of Regulation S-K. These schedules and exhibits consist of (i) the Disclosure Schedules (as such term is defined in the Stock Purchase Agreement), (ii) the Transition Services Agreement (as such term is defined in the Stock Purchase Agreement), (iii) the Allocation Schedule (as such term is defined in the Stock Purchase Agreement), and (iv) the Target Working Capital (as such term is defined in the Stock Purchase Agreement). Unitil Corporation hereby undertakes to furnish supplementally copies of any of the omitted schedules and exhibits upon request by the Securities and Exchange Commission or its staff.
(P) Paper exhibit.
(P)
The text of this filing, as the company filed it with the SEC, without its images or exhibits. This is not investment advice.