SCHEDULE 14A

(Rule 14a-101)

INFORMATION REQUIRED IN PROXY STATEMENT

SCHEDULE 14A INFORMATION

Proxy Statement Pursuant to Section 14(a) of the Securities

Exchange Act of 1934 (Amendment No.    )

Filed by the Registrant    ☒

Filed by a Party other than the Registrant    ☐

Check the appropriate box:

UNITIL CORPORATION

(Name of Registrant as Specified in Its Charter)

(Name of Person(s) Filing Proxy Statement, if Other Than the Registrant)

Payment of Filing Fee (Check the appropriate box):

☒    No fee required.

☐    Fee computed on table below per Exchange Act Rules 14a-6(i)(1) and 0-11.

☐    Fee paid previously with preliminary materials.

☐    Check box if any part of the fee is offset as provided by Exchange Act Rule 0-11(a)(2) and identify the filing for which the offsetting fee was paid previously. Identify the previous filing by registration statement number, or the form or schedule and the date of its filing.

Unitil Corporation

2021 Proxy Statement

Notice of Annual Meeting of Shareholders

Annual Meeting    ◆    Wednesday, April 28, 2021

11:30 a.m. EDT

Hampton, New Hampshire

March 25, 2021

Dear Fellow Shareholder,

I am pleased to invite you to the Unitil Corporation Annual Meeting of Shareholders to be held on Wednesday, April 28, 2021, at 11:30 a.m. Eastern time, at our corporate headquarters, 6 Liberty Lane West, Hampton, New Hampshire, as well as online via live webcast.

This year, we are asking shareholders to vote on the election of three directors, and on the ratification of the selection of independent registered public accountants. Also this year, shareholders will be presented with an advisory vote on executive compensation.

Your vote is very important. I encourage you to vote to ensure that your voice is represented at the meeting, and to play a part in our future. The enclosed proxy materials provide important information to assist you with your voting decisions, as well as details regarding how to participate in the Annual Meeting online via live webcast, and instructions to submit your vote.

I would like to thank you for choosing to invest in Unitil Corporation. Our Vision, Mission and Values reflect our deep commitment to our shareholders, customers, employees, local communities and partners. We provide more than just electricity and gas services and products. Energy for life is the statement we use to describe this commitment.

On behalf of the Board of Directors and management of Unitil Corporation, thank you for your continued support and confidence in 2021.

Sincerely,

Thomas P. Meissner, Jr.

Chairman of the Board,

Chief Executive Officer and

President

NOTICE OF ANNUAL MEETING OF SHAREHOLDERS

The Unitil Corporation (the “Company”) 2021 Annual Meeting of Shareholders will be held at the office of the Company, 6 Liberty Lane West, Hampton, New Hampshire, as well as online via live webcast, on Wednesday, April 28, 2021, at 11:30 a.m. Eastern time for the following purposes:

The Board of Directors set February 19, 2021, as the date for determining holders of record of common stock who are entitled to notice of and to vote at the meeting or at any adjournments or postponements of the meeting. The Board of Directors has directed the Company to prepare this notice, the accompanying proxy statement, and the accompanying annual report, and to send them to you.

If you plan to attend the online live webcast, please review and follow the registration instructions outlined in the Information About the Annual Meeting section of this proxy statement.

By Order of the Board of Directors,

Sandra L. Whitney

Corporate Secretary

YOUR VOTE IS IMPORTANT

Your vote is important. To ensure a quorum is present at the Annual Meeting of Shareholders, please be sure your shares are represented at the meeting.

You may vote in one of the following ways:

ATTENDING THE ANNUAL MEETING OF SHAREHOLDERS

Please see the Notice below.

All shareholders may attend the Annual Meeting of Shareholders. However, to ensure that the meeting remains orderly and secure, you must follow certain procedures for admittance whether in person or online.

Attending in Person

Shareholders of record will need to provide their name and government-issued picture identification. Beneficial owners will need to provide a copy of an account statement from the bank, broker or nominee holding the shares as proof of ownership as of the Record Date, as well as government-issued picture identification.

We fully recognize that the ongoing COVID-19 pandemic continues to create a challenging environment for everyone. The health and safety of our employees and the public at large is of primary importance. If you should elect to attend the Annual Meeting in person, you will be expected to:

Attending Online via Live Webcast

The Annual Meeting will begin promptly at 11:30 a.m. Eastern time. You will need the following information for online check-in:

Please allow at least 10 minutes to complete the online check-in process before the meeting begins.

Your Control Number

If you are a shareholder of record, your unique Control Number can be found on your proxy card in the shaded box. No advance registration is required.

If you are a beneficial holder, which means that you hold your shares through an intermediary, such as a bank, broker or other nominee, you must register in advance to request a Control Number, which will be assigned to you by our transfer agent, Computershare. Advance registration must completed by 5:00 p.m., Eastern time, on Thursday, April 22.

Additional information about the Annual Meeting webcast, including detailed advance registration instructions and how to join the meeting, is outlined in the Information About the Annual Meeting section of this Proxy Statement, as well as on our website at unitil.com/investors.

TABLE OF CONTENTS

PROXY STATEMENT

Unitil Corporation

6 Liberty Lane West

Hampton, NH 03842-1720

March 25, 2021

PROXY STATEMENT

Unitil Corporation (“Unitil” or the “Company”) is providing this proxy statement and the accompanying annual report (which includes the Company’s Annual Report on Form 10-K for fiscal year 2020) to shareholders in connection with our 2021 Annual Meeting of Shareholders (the “Annual Meeting”). Unitil’s Board of Directors (the “Board”) is soliciting your designation of a proxy to vote your shares at the Annual Meeting. As a shareholder of Unitil, you are invited to the Annual Meeting, as well as entitled and requested to vote (if you are a shareholder of record) or to provide voting instructions (if you beneficially own your shares in street name) on the proposals described in this proxy statement. This proxy statement provides information to assist you in voting your shares or in providing voting instructions with respect to your shares.

Unitil has the following subsidiaries, which are referred to throughout this proxy statement: Fitchburg Gas and Electric Light Company (“Fitchburg”); Granite State Gas Transmission, Inc. (“Granite”); Northern Utilities, Inc. (“Northern”); Unitil Energy Systems, Inc. (“Unitil Energy”); Unitil Power Corp.; Unitil Realty Corp.; Unitil Resources, Inc.; and Unitil Service Corp.

We may also refer to Unitil as “we” or “our” or “us” throughout this proxy statement.

Date, Time and Place

The Annual Meeting will be held on Wednesday, April 28, 2021, at 11:30 a.m. Eastern time, both at our corporate office, 6 Liberty Lane West, Hampton, New Hampshire 03842-1720, as well as online via live webcast.

Online Live Webcast

We are very pleased to offer the option to attend this year’s Annual Meeting online via live webcast. Online attendance will allow you to participate in the Annual Meeting, vote your shares electronically at the meeting, and submit your questions prior to and during the meeting.

Please review carefully the important information concerning the online live webcast outlined below.

1

To participate in the Annual Meeting webcast, you will need the following information:

Website: www.meetingcenter.io/295795918

Your Unique Control Number

Meeting Password:    UTL2021

The Annual Meeting webcast will begin promptly at 11:30 a.m., Eastern Time, on Wednesday, April 28, 2021. We encourage you to access the meeting at least 10 minutes prior to the start time to allow enough time to complete the check-in process.

If you need technical assistance, it will be available online when you check in as well as during the webcast.

If you are a shareholder of record, which means you hold your shares through an account with our transfer agent, Computershare, your Control Number can be found in the shaded box on the proxy card that we mailed to you.

If you are a beneficial holder, which means that you hold your shares through an intermediary, such as a bank, broker or other nominee, you must register in advance to request a Control Number, which will be assigned to you by our transfer agent, Computershare. Advance registration must be completed by 5:00 p.m., Eastern time, on Thursday, April 22. Please follow the instructions below for advance registration.

If you have any questions with regard to whether you are a shareholder of record or a beneficial holder, please contact us toll-free at 800-999-6501 or via email at InvestorRelations@unitil.com.

2

If you are a beneficial holder, you must register in advance to attend the Annual Meeting webcast.

Advance Registration Procedure:

Requests for registration should be directed to our transfer agent, Computershare, in one of the following ways:

By email:

Forward the email from your broker, or attach an image of your legal proxy, to legalproxy@computershare.com

By mail:

Computershare

Unitil Corporation Legal Proxy

P.O. Box 43001

Providence, RI 02940-3001

We strongly encourage you to submit your request for registration via email if at all possible to make sure your request is received before the deadline on April 22, 2021.

3

Questions will be addressed during the Question and Answer Session, which will be announced by the meeting operator at the appropriate time.

All submitted questions will be monitored and communicated to the Chairman of the Board and shareholder attendees by a member of management. We will, however, observe the purpose of the Meeting and will not address questions or comments that are:

If you have any questions with regard to the Annual Meeting live webcast or any information presented above please contact us toll-free at 800-999-6501 or via email at InvestorRelations@unitil.com.

Anticipated Mailing Date

We anticipate first mailing definitive copies of this proxy statement, the accompanying proxy card, and the accompanying annual report to shareholders on or about March 25, 2021.

MEETING SUMMARY

This year, we are seeking your vote on the following proposals:

4

QUORUM & REQUIRED VOTE

A majority of the outstanding shares of common stock entitled to vote at the Annual Meeting must be present in person (physically or online via live webcast) or represented by proxy to conduct the Annual Meeting. This is referred to as a quorum.

If a quorum is present, the nominees standing for election as a Director will be elected by a plurality of the votes cast by the shareholders. Votes withheld and broker non-votes will not be counted toward the achievement of a plurality. Additional information concerning the election of directors appears in the sections entitled Corporate Governance – Resignation Policy and Proposal 1 – Election of Directors. With respect to all other matters that may come before the Annual Meeting, action on a matter is approved if the votes cast favoring the action exceed the votes cast opposing the action. Therefore, abstentions and broker non-votes will have no effect on the other matters. Representatives of our transfer agent will count the votes and certify the results.

VOTING RIGHTS AND PROCEDURES

As an owner of Unitil common stock, it is your legal right to vote (or to provide voting instructions) on all matters to be considered at a shareholder meeting. We hope you will exercise your legal right and fully participate as a shareholder in the Annual Meeting. You may cast one vote for each share of common stock that you own on all matters presented at the Annual Meeting.

The Board has selected and approved Thomas P. Meissner, Jr. and Robert B. Hevert as proxies for the Annual Meeting to vote your shares in the manner that you specify on the proxy card or via the Internet, or if you do not give any specification on your proxy card or submitted proxy with respect to a matter, FOR such matter. Your designation of a proxy will not affect your right to attend the Annual Meeting and vote at the meeting.

5

Record Holders

If your shares of common stock were registered directly in your name with our transfer agent as of the Record Date, then you are considered a shareholder of record of the shares (a “Record Holder”) and we have sent the proxy materials and the accompanying proxy card directly to you.

Beneficial Holders

If your shares of common stock were registered in the name of a bank, broker or other nominee as of the Record Date, then you are considered a beneficial owner (“Beneficial Holder”) of the shares that are registered in street name and your bank, broker or other nominee has sent this proxy statement and voting instructions to you. As a Beneficial Holder, your shares may be voted even if voting instructions are not provided.

Brokerage firms have the authority under New York Stock Exchange rules to vote shares for which their customers do not provide voting instructions on routine matters. The ratification of the selection of our independent registered public accounting firm, Deloitte & Touche LLP, for fiscal year 2021 is considered a routine matter. When a proposal is not routine and the brokerage firm has not received voting instructions from its customers, the brokerage firm cannot vote the shares on that proposal. Those shares are considered “broker non-votes.” Please note that, under New York Stock Exchange rules, this means that brokers may not vote your shares on Proposals 1 and 3 at the 2021 Annual Meeting if you have not given specific instructions as to how to vote to the broker. Please be sure to give specific voting instructions to your broker so that your vote can be counted.

6

A MESSAGE FROM TOM MEISSNER, CHAIRMAN AND CEO

By any measure, 2020 proved to be a challenging year for our Company, our shareholders, our customers, and our employees. The year began with the warmest winter heating season in decades, negatively impacting our natural gas sales and earnings. As the calendar turned to spring, we found ourselves in the grip of a worldwide health emergency not witnessed in over a century. Efforts to contain the COVID-19 pandemic led to the lockdown of our economy, plunging our nation into a deep recession. Ensuring the health and safety of our employees required immediate and extensive operational changes, all while continuing to deliver safe and reliable service to our customers.

Faced with these challenges, we persevered and achieved solid results both operationally and financially.

We implemented our investment plan, which included grid modernization projects, infrastructure replacement, and customer growth initiatives, and we remained focused on our commitment to sustainability. We delivered exceptional service to customers, achieving our highest customer satisfaction ratings ever. We continued our exceptional track record in gas pipeline safety, achieving our best emergency response performance ever. Above all, we kept our employees, our greatest asset, safe throughout a challenging year.

Equally important, we advanced our strategic priorities. We continue to prepare for the future with the alignment of our strategies with the goals and aspirations of our stakeholders, as well as with our sustainability and corporate responsibility priorities. Decarbonized energy solutions for the energy, heating and transportation sectors continue to create new policy goals and initiatives in our region, as well as new opportunities, as we move toward lower carbon alternatives. Our Vision is to transform the way people meet their evolving energy needs to create a clean and sustainable future. We fully support the transition to clean energy and believe this is the best way to position our Company for true sustainability and long-term success.

While much attention has been directed toward carbon reduction, other important industry drivers like public safety, grid resiliency and cyber security remain at the forefront of our efforts as well. Working to ensure the core elements of our business, including safety, reliability and top-tier customer service, remain sustainable is an important focus for our Company and a critical factor for our future success. As a provider of essential services, we power the daily lives of our customers and communities even under the most difficult circumstances. Never before has the idea of energy for life been more meaningful.

As we begin 2021, I have confidence that the initiatives and actions we are taking now to achieve both our Mission and our Vision will shape the successes of tomorrow, and I’m very happy you are here to share in our journey.

March 25, 2021

7

ACTING ON OUR VALUES

Our RISE values are the guiding principles behind our actions, but they are only as good as they are meaningful and measurable. Continued focus on the importance of these values will drive our commitment to deliver ‘energy for life’ and the achievement of our Vision of a clean and sustainable future for all of our stakeholders.

8

On March 11, 2021, we announced that Laurence M. Brock will retire as senior vice president of the Company on July 1, 2021.

In 2020, Mr. Brock was instrumental in the smooth transition of Robert B. Hevert to senior vice president, chief financial officer and treasurer of the Company, as well as the transition of Daniel J. Hurstak to chief accounting officer and controller of the Company. Mr. Brock will continue to contribute to the ongoing continuity of Unitil’s financial leadership until his retirement.

Additional information concerning Mr. Brock’s background and employment history with us can be found in the Management Information Table on the follow page.

9

The table below shows Executive Officers’ biographical information as of the date of this proxy statement, including the Named Executive Officers.

MANAGEMENT INFORMATION TABLE

10

The following table sets forth information on the beneficial ownership of our common stock as of the Record Date, by (i) each person known to us to be the beneficial owner of more than five percent of our common stock, (ii) each Director and nominee for Director, (iii) each executive officer named in the Summary Compensation Table in the section entitled Compensation - Compensation of Named Executive Officers (the “Named Executive Officers”) and (iv) all Directors and executive officers of Unitil as a group. Except as otherwise indicated, to our knowledge, the beneficial owners listed have sole voting and sole dispositive power with respect to the shares beneficially owned by them. The address of each of Unitil’s Directors and executive officers is c/o Unitil Corporation, 6 Liberty Lane West, Hampton, New Hampshire 03842-1720.

BENEFICIAL OWNERSHIP

11

NOTES:

12

SECTION 16(a) BENEFICIAL OWNERSHIP REPORTING COMPLIANCE

Section 16(a) of the Securities Exchange Act of 1934 (“Exchange Act”) requires our executive officers, Directors, and persons who beneficially own more than ten percent of a registered class of our equity securities to file certain reports of ownership and changes in share ownership with the Securities and Exchange Commission (“SEC”) and the New York Stock Exchange (“NYSE”). Based upon our review of such forms that were filed in 2020, and written representations from certain reporting persons that such forms were not required to be filed by those persons for the reporting year 2020, we believe that all filing requirements applicable to our officers and Directors during 2020 and through March 2021, were met.

13

Unitil’s Board and management are committed to comprehensive and effective corporate governance practices. The Board believes that good corporate governance is the key to our long-term success, and the foundation to ensuring that the Company is operated in the best interest of shareholders and all other stakeholders. Accordingly, the Board has unconditionally adopted Corporate Governance Guidelines and Policies of the Board (the “Guidelines”), as described below, to assist Directors in the pursuit of superior Board function, effectiveness, communication and transparency in the governance of the Company. The Board and management believe that the ethical character, integrity and principles of the Board and senior management remain the most important safeguards of good corporate governance. Our RISE values require that solid governance practices are intrinsic to our Company culture, and are critical to long-term value creation and, ultimately, the sustainability of the Company.

The Guidelines represent the current view of the Board on governance and should not be viewed as rigid restraints. We will continue to monitor new developments and regulations, as well as emerging issues concerning corporate governance and financial disclosure, and will adopt changes and new policies, as appropriate. These Guidelines are reviewed regularly and are subject to modification from time to time by the Board. The Guidelines are available for review on the Corporate Governance page of the Investor Relations section of our website at unitil.com/investors, and are available in print to any shareholder or other interested party free of charge upon request to the Corporate Secretary at 1-800-999-6501 or at the address listed in the section entitled Information about the Annual Meeting.

ROLE OF THE BOARD   The Board is elected by the shareholders to oversee the long-term health and overall success of our business and to ensure our ongoing financial strength. The Board serves as the Company’s ultimate decision-making body on all matters, except for those reserved for or shared with the shareholders or committees of the Board. In the pursuit of excellence in corporate governance, all members of the Board are expected to adhere to a set of core values and our Code of Ethics, without exception.

DIRECTOR INDEPENDENCE

Our Guidelines stipulate that a majority of the members of the Board, and all members of the Audit, Compensation, and Nominating and Governance Committees, must be independent (as defined in Section 303A.02 of the NYSE Listed Company Manual—Corporate Governance Standards). As a listed

14

company on the NYSE, we must adhere to the independence standards set forth by the NYSE, and the Board has formally adopted independence criteria corresponding to the NYSE rules for director independence. The NYSE Listed Company Manual includes additional independence requirements for Audit Committee and Compensation Committee members. In addition, Rule 10A-3 of the Securities Exchange Act of 1934 (the “Exchange Act”) includes additional independence requirements for Audit Committee members.

Our Corporate Governance Guidelines, as well as the NYSE independence standards, require that the Board annually affirm the independent status of non-employee or “outside” Directors. The Board makes this affirmation annually in January, and based on its last comprehensive review on January 27, 2021, the Board determined at that time, with the exceptions of Mr. Meissner and Mr. Collin, all of the current Board members are independent.

RISK OVERSIGHT

The Board is responsible for the oversight of management, the development of Company policy and strategy, and the ongoing assessment of the Company’s operational effectiveness and financial strength, which includes the oversight of risk. The Board’s ultimate goals are to ensure that Unitil continues as a successful and sustainable business, to optimize financial returns in light of the business risks, to increase shareholder value over time, and to protect the interests of all stakeholders.

We have a formal Enterprise Risk Management (“ERM”) program which has been in place since 2014. The Board has definitive oversight responsibility for the ERM program in accordance with its fiduciary duty. Management provides the Board with a formal report annually, as well as with quarterly status updates, and any other updates as needed, which could include the identification of a new risk, or a change in risk

15

velocity or mitigation strategy. The Board also receives a quarterly presentation on a specific risk topic selected from the ERM program for greater depth of understanding of the selected risk.

The ERM program is a foundation for risk management that is relevant, sustainable and scalable. The ERM program is designed to identify potential risks, and to manage risks within our risk appetite in order to sustain operations and achieve business and strategic objectives. In building the ERM program, the potential risks relating to our business were defined using a comprehensive set of risk disclosures which are described in Part I, Item 1A. Risk Factors of our 2020 Annual Report on Form 10-K filed with the SEC on February 2, 2021.

In its oversight role, the Board is supported by the Risk and Compliance Committee (the “RCC”), a multi-function management committee created to provide recommendations on systems, policies and processes to achieve objectives, mitigate risk and ensure compliance. The RCC, chaired by Mr. Hevert, works with Mr. Meissner to evaluate and provide direction with respect to risk identification and assessment, risk management and mitigation, and the specific guidelines and policies governing the process. The RCC also works directly with functional managers on emerging risks and mitigation plans. The RCC provides quarterly reports on the status of the ERM program to the Board, as well as an annual report at the strategic planning meeting.

Like all companies, we face a variety of risks, both internal and external, and many factors work simultaneously to affect our overall business risk. The Board recognizes that our business risk is not static, and that it is not possible to mitigate all risk and uncertainty. The Board works within a climate of respect and candor, fostering a culture of open dialog between Board members and senior management, which includes comprehensive knowledge of Unitil’s many elements of risk. Overall, the Board believes that a systematic and proactive approach to properly oversee risk management has been defined and enhanced by the ERM program, which will continue to evolve through ongoing review and assessment of the existing and emerging risks facing the Company.

16

BOARD SUCCESSION PLAN

The Board is engaged in ongoing succession planning, which is led by the Nominating and Governance Committee. The Board Succession Plan addresses upcoming retirements, committee membership and rotation, class balancing, skill set requirements and gaps, and planning for unforeseen events. The Board Succession Plan is also directly linked to both new director recruitment actions and diversity goals.

17

RETIREMENT POLICY

No Director may be nominated as a candidate for re-election as part of the slate of Directors that we propose, nor may any person be nominated as a candidate for election, after he or she has reached age 75. Directors are not, however, subject to specific term limits. Due to the complexity of the utility industry, we value the insight that a Director is able to develop over a period of time. The Board believes that tenure provides an enhanced contribution to the Board, including the benefits of valuable experience and familiarity, which is in the best interest of shareholders.

DIRECTORS’ STOCK OWNERSHIP AND RETENTION POLICY

The Board believes that its members should own a significant number of shares of our common stock to properly align their interests with those of our shareholders. All non-employee Directors must own shares of common stock in the equivalent value of three times the current annual cash retainer for Board service. Shares of restricted stock and restricted stock units (“RSUs”) are counted towards this total. The ownership requirement is calculated annually on January 1, and as of January 1, 2021, the ownership requirement is currently $195,000 in value. Mr. Collin, Ms. Crutchfield, Mr. Godfrey, Mr. Green, Mr. Moulton, and Mr. Whiteley meet the stock ownership requirement. Any new Director who joins the Board has four years from the date of first election to the Board by shareholders to accumulate the required number of shares of common stock, which currently applies to Mr. Brown, who has served on the Board for one year, as well as Ms. Foster and Ms. Vogel, both of whom have served on the Board for two years and are standing for re-election at the Annual Meeting. Additionally, all members of the Board are required to hold all forms of equity received from the Company until retirement or other separation from the Company. For Board members, this includes all forms of equity received as part of the annual retainer for Board service. The Board, in its sole discretion, may approve a waiver to this policy as circumstances may warrant. To date, no such waivers have been proposed or approved.

RESIGNATION POLICY

A Director is required to tender his or her resignation if he or she receives a “withhold” vote greater than 50% of the shares voted at the annual meeting of shareholders in an uncontested election. If an incumbent Director fails to receive the required vote for re-election, the Nominating and Governance Committee will act on an expedited basis to determine whether to recommend the acceptance of the Director’s resignation and will submit such recommendation for prompt consideration by the Board. The Director whose resignation is under consideration shall abstain from participating in any decision regarding that resignation. The Nominating and Governance Committee and the Board may consider any factors they deem relevant in deciding whether to accept a Director’s resignation.

The Board nominates for election or re-election to the Board only candidates who agree to tender, promptly following the annual meeting at which they face election or re-election as Director, irrevocable resignations that will be effective upon (i) the failure to receive the required vote at the annual meeting at which they face re-election and (ii) Board acceptance of such resignation. In addition, the Board fills board

18

seat vacancies and new directorships only with candidates who agree to tender, promptly following their appointment to the Board, the same form of resignation tendered by other Directors in accordance with this policy. All candidates proposed for election or re-election at the Annual Meeting have agreed in writing to abide by this policy.

MEETING ATTENDANCE

Directors are expected to make a determined effort to attend all meetings of the Board and applicable committees upon which they serve. In 2020, the Board held five meetings, and its committees held a total of 35 meetings, collectively. No Director attended less than 75% of the aggregate number of meetings of the Board and applicable committees. In 2020, for the second year in a row, perfect attendance was achieved with all Directors attending 100% of the meetings held in 2020. Directors are encouraged to attend the Annual Meeting, although there is no formal requirement to attend. In 2020, due to the restrictions of the COVID-19 pandemic and the inherent danger of group gatherings, the Annual Meeting was abbreviated to address formal business only, and one Director was in attendance.

EXECUTIVE SESSIONS

Non-employee members of the Board have the opportunity to meet in executive session, without members of management present, either prior to the start or following the adjournment of each Board and committee meeting. During 2020, the Board met in executive session on four occasions. Mr. Green, the Lead Director, presided at all four meetings.

CODE OF ETHICS

Our Code of Ethics (the “Code of Ethics”) is a statement of our high standards for ethical behavior, legal compliance and financial disclosure, and is applicable to all of our Directors, officers and employees. The Board unanimously approved the Code of Ethics in 2004, and along with all management personnel, annually affirms understanding of, and agreement and compliance with, the Code of Ethics. The Nominating and Governance Committee reviews the Code of Ethics annually for any required or desirable revisions. Should the Board adopt any changes to, or waivers of, the Code of Ethics, those changes or waivers will be promptly disclosed and posted on our website at the address noted below. To date, there have been no changes to or waivers requested or granted with regard to the Code of Ethics. A copy of the Code of Ethics can be viewed on our website at unitil.com/investors.

MANAGEMENT SUCCESSION PLANNING

Effective executive leadership is critical to our success. The Board oversees the senior management succession planning process to ensure that effective plans are in place for succession of the CEO, as well as other senior management positions. The succession plan addresses contingencies for retirement,

19

resignation, death, disability, or other untimely departure of the CEO and/or other members of senior management for a smooth transition on both an interim and long-term basis. In 2019, the management succession plan was evaluated for gaps and other risk factors. As a result of that evaluation, in 2020, the management succession plan was expanded and developed further to include middle management and other key positions, including long-serving employees nearing retirement. The management succession plan is an ongoing and fluid process that is reviewed and updated regularly to address both immediate needs and long-term goals. Also in 2020, in light of the COVID-19 pandemic, management established a Crisis Succession Plan for key officers to establish clear succession protocol in the event of an emergency. The Crisis Succession Plan is a stand-alone plan and does not replace or reduce ongoing management succession planning efforts.

EXECUTIVE COMPENSATION RECOVERY POLICY

In the event we are required to prepare an accounting restatement of our financial statements due to the material noncompliance with any financial reporting requirement under the securities laws, we shall be entitled to recover any excess performance-based compensation received by any current or former covered executive during the three-year period immediately preceding the date on which we are required to prepare an accounting restatement. To the extent allowed by applicable law and the listing standards of the New York Stock Exchange, we may seek to recover any such excess performance-based compensation at the direction of the Compensation Committee after consideration of the costs and benefits of doing so, and as approved by Board.

“Performance-based compensation” includes all annual incentives and long-term incentives (whether in cash, in equity, or otherwise) with performance features based on Unitil’s or a group’s performance, the award or size of the award of which was contingent upon such performance.   The policy does not apply to restatements that the Board determines are required or permitted under generally accepted accounting principles in connection with the adoption or implementation of a new accounting standard or caused by our decision to change one or more accounting practices as permitted by applicable law.

20

EXECUTIVE STOCK OWNERSHIP POLICY

All Named Executive Officers are required to own shares of our common stock in the equivalent value of a multiple of base salary. All shares of our common stock that are owned directly or beneficially, shares of restricted stock that are awarded, whether vested or unvested, as well any shares of Unitil common stock held in the Tax Deferred Savings and Investment Plan will be counted towards the required total. Any newly appointed Named Executive Officer will have four years from the date of appointment to obtain the required shares of stock. The required equivalent value for all Named Executive Officers will be recalculated annually on January 1. Any executive officer who may regress into a shortfall position as a result of the January 1 recalculation after expiration of the initial phase-in period will have until December 31 of that calendar year to meet the new required equivalent value. As of the date of this proxy statement, all current Named Executive Officers have met the stock ownership requirement, with the exception of Mr. Hevert. Mr. Hevert was appointed Senior Vice President, Chief Financial Officer and Treasurer of the Company in July 2020, and he will have until July 2024 to meet the ownership requirement.

EXECUTIVE STOCK RETENTION POLICY

The Board believes that our executive officers should own a significant number of shares of our common stock to properly align their interests with those of the shareholders. All Named Executive Officers are required to hold all forms of equity received as compensation until retirement or other separation from the Company. The Board, in its sole discretion, may approve a waiver to this policy as circumstances may warrant. To date, no such waivers have been proposed or approved.

PROHIBITION ON HEDGING AND/OR PLEDGING COMPANY STOCK POLICY

All members of our Board and our executive officers are prohibited from engaging in short sales or engaging in any hedging transaction with respect to our common stock, as well as engaging in any transactions that result in pledging, or using as collateral, shares of our common stock in order to secure personal loans or other obligations, including any shares that may be a margin account.

COMMUNICATION WITH THE BOARD

Shareholders and other interested parties who desire to communicate with the Board, a committee of the Board, the non-management or independent Directors as a group, or an individual member of the Board may do so in writing by sending a letter c/o Corporate Secretary, Unitil Corporation, 6 Liberty Lane West, Hampton, New Hampshire 03842-1720 or via email to whitney@unitil.com. The Corporate Secretary will screen all correspondence for security purposes, and will also determine whether the communication relates to business matters that are relevant to us. If the correspondence meets these standards, it will be promptly forwarded to the appropriate Director(s).

21

NOMINATIONS

The Nominating and Governance Committee is responsible for recommending to the Board the slate of Director nominees for election by our shareholders. The Board reviews and, as appropriate, approves all Director nominees to be presented to our shareholders for election. As provided in Article III of our Bylaws, any vacancy occurring in the Board, whether due to the death, resignation or other inability to serve of any Director previously elected may be filled by the affirmative vote of a majority of the remaining Directors.

General Nomination Process

The Nominating and Governance Committee determines the required selection criteria and qualifications of Director nominees based upon the needs of the Company at the time nominees are considered. See also the section entitled Qualifications and Skills of Directors below. Director candidates will be selected based on input from Directors, executive officers, and if the Committee deems appropriate, a third-party search firm. Minimum criteria for Director nominees are set forth below, as well as in the Corporate Governance Guidelines. A candidate must possess the ability to apply good business judgment and must be in a position to properly exercise his or her duties of loyalty and care. Candidates with potential conflicts of interest will be identified and disqualified, as appropriate. In addition, the Committee will consider criteria including independence, proven leadership capabilities, business experience, areas of expertise, and factors relating to the composition of the Board, such as size, structure, and diversity. The Board seeks to include diversity of backgrounds, perspectives, experience and skills among its members. The Committee will consider these criteria for nominees identified by the Committee, by other Directors, by shareholders, or through another source. When current Board members are considered for nomination for reelection, the Committee also takes into consideration their prior Board contributions, performance, and meeting attendance records.

The Committee makes a preliminary assessment of each proposed nominee based upon his or her resume and biographical information, an indication of his or her willingness to serve and other background information. This information is evaluated against the criteria set forth above as well as our specific needs at the time. Based upon a preliminary assessment of the candidate(s), those who appear best suited to meet our needs may be invited to participate in a series of interviews, which are used for further evaluation. On the basis of information collected during this process, the Committee determines which nominee(s) to recommend to the Board for approval to submit for election at the next annual meeting of shareholders, or to fill vacancies on the Board that occur between shareholder meetings. The Committee uses the same process for evaluating all nominees, regardless of the source of the nomination. The Board may elect, at its discretion, to participate in an additional round(s) of interviews with one or all candidate(s) recommended by the Committee.

The Committee’s dedicated actions and well-planned process resulted in the addition of four outstanding and highly qualified Board members in the past two years, all of whom have varied and extensive experience in numerous important areas that have proven to enhance the Board’s strong skill set and diversity goals. The Board is dedicated to the importance of diversity in all respects, including professional experience, unique skill sets, age, and gender for sustainability in the long-term and ongoing value creation for our shareholders.

22

Shareholder Nominations

Shareholders who wish to recommend a nominee for consideration by the Committee may do so by sending the following information to the Committee c/o the Corporate Secretary at the address listed in the section entitled Corporate Governance – Governance Policies of the Board—Communication with the Board: (1) the name of the candidate with brief biographical information and his or her resume; (2) contact information for the candidate and a document evidencing the candidate’s willingness to serve as a Director if elected; and (3) a signed statement as to the submitting shareholder’s current status as a shareholder and proof of ownership of the number of shares currently held.

23

The Board believes there are general qualifications that all Directors must exhibit, and other qualifications, attributes, skills and experience that should be represented on the Board as a whole, but not necessarily by each Director.

Qualifications Required of All Directors

The Board requires that each Director be a person of high integrity and superior ethical character with a proven record of leadership and accomplishment in his or her chosen field. Each Director must demonstrate innovative and independent thinking, understand complex principles of business, finance, and utility regulation, and demonstrate familiarity with and respect for corporate governance requirements and practices. Directors must also comply unequivocally with the Code of Ethics, and be free of conflicts or potential conflicts of interest, and a sufficient number of Directors must meet the requirements of independence as set forth by the NYSE, as appropriate. Directors must be willing and able to dedicate the proper amount of time and effort to service on the Board as necessary to fulfill his or her responsibilities as a Director, and must not serve on more than two public company boards if currently holding a position of chief executive officer or an equivalent position, or on more than three public company boards if serving in an alternate role, or if retired.

Qualifications, Attributes, Skills and Experience to be Represented on the Board

The Board has identified certain qualifications, skills, experience and background that it believes are important to be represented on the Board. The Nominating and Governance Committee is charged with the

24

The Skills Matrix Summary outlines certain essential key qualifications and experience that the Board believes should be represented on the Board for optimal oversight of our business and the effective exercise of its fiduciary duty to shareholders. Directors standing for re-election are also evaluated by the Committee for recommendation to the Board using a set procedure based on the expectations of Board members, which is provided to all members of the Board and reviewed annually. The evaluation includes contribution to the Board and committees served upon; unique skills, expertise and attributes; attendance and preparedness; and willingness to continue serving. Overall continuity and chemistry of the Board are also considerations, as well as factors relating to the composition of the Board, such as size and structure, and the diversity of backgrounds, perspectives, experience and skills among its members. Tenure on the Board is considered to be a uniquely valuable qualification in the highly regulated utility industry.

The Nominating and Governance Committee periodically reviews and, as needed, updates, the Skills Matrix. This generally involves a self-evaluation by each Board member concerning what they perceive to be their own primary and secondary skills within the Skills Matrix. This helps to ensure the Skills Matrix is current and relevant, and also defines the Board’s strongest skill sets, which are currently C-Suite experience, financial expertise, strategic planning, and utility operations and regulation.

BOARD DIVERSITY

TRANSACTIONS WITH RELATED PERSONS

The Audit Committee is responsible for reviewing and approving, as appropriate, all Related Person Transactions (as defined below), in accordance with its charter (the “Audit Committee Charter”). As a result, the Committee has adopted procedures for such review and approval and included such procedures in our

25

Corporate Governance Guidelines. We had no Related Person Transactions requiring disclosure in 2020, and there are no Related Person Transactions requiring disclosure currently proposed for 2021. “Related Person” and “Related Person Transaction” are defined in Item 404(a) of SEC Regulation S-K.

Transactions between Unitil or one or more of its subsidiaries and one or more Related Person may present risks or conflicts of interest or the appearance of conflicts of interest. Our Code of Ethics generally requires all employees, officers and Directors to avoid engagement in activities or relationships that conflict, or would be perceived to conflict, with our interests or adversely affect our reputation. It is understood, however, that certain relationships or transactions may arise that would be deemed acceptable and appropriate upon full disclosure of the transaction, following review and approval to ensure there is a legitimate business reason for the transaction and that the terms of the transaction are no less favorable to us than could be obtained from an unrelated person.

In connection with the review and approval or ratification, if appropriate, of any Related Person Transaction, the Audit Committee will consider whether the transaction will compromise our professional standards included in its Code of Ethics. In the case of any Related Person Transaction involving an outside Director or nominee for Director, the Committee will also consider whether the transaction will compromise the Director’s status as an independent Director as prescribed in the NYSE Listed Company Manual, Section 303A, Independent Directors. The procedures followed by the Committee to evaluate transactions with Related Persons are also available in the Corporate Governance portion of the Investor Relations section of our website at unitil.com/investors.

SECTION 16(a) BENEFICIAL OWNERSHIP REPORTING COMPLIANCE

The subsection entitled Section 16(a) Beneficial Ownership Reporting Compliance within the Share Ownership section of this proxy statement is incorporated herein by reference.

26

Sustainability is central to our Mission and Vision. It is fully embedded in our key initiatives and strategies, our leadership development and workforce planning, our RISE values (Respect, Integrity, Stewardship and Excellence) and the tone at the top. We believe continued focus on our Mission, Vision, values and goals, and managing the critical success factors outlined in our strategic plan will ensure ongoing profitability and long-lasting growth for the benefit of our customers, employees, investors, and all stakeholders.

Our Approach to Sustainability

Our approach to corporate sustainability reflects a broad set of objectives including superior customer service, affordable rates, service to our communities, environmental stewardship, a steadfast commitment to safety, and the growth and well-being of our employees. Our values state clearly that sustainability initiatives are fundamental to and firmly rooted in our culture. This top-to-bottom emphasis on the very nature of sustainability assures long term benefits and value creation, and reflects our commitment to our corporate responsibilities to our investors, employees, customers, and society at large.

Sustainability Practices and Priorities

We have defined four key areas we believe will be central to the utility industry as the transition to a sustainable future continues. By looking closely at each area, we have identified practices and priorities that demonstrate our commitment to sustainability in support of our stakeholders while simultaneously illustrating our corporate culture in action.

27

Sustainability and Strategic Planning

Sustainability is a central element of our strategic planning process. We consider the landscape of the energy industry, our role in that space today, and what we see as our role going forward in the annual development of our plan. We have identified key areas of focus within both our Mission and Vision, and setting and achieving milestones in each Mission focus area while also creating new initiatives closely aligned with our Vision will position us for success today and for years to come.

Mission Focus

Vision Focus

28

Diversity and Inclusion   Diversity, equity, and inclusion are integral to our culture. In early 2021, our Human Resources and Sustainability teams undertook a 21-day learning challenge focused on racial equity. The materials and topics for this learning challenge were curated by the New Hampshire Businesses for Social Responsibility organization. The culmination of this learning challenge was to create an action plan that reflects our commitment to work for racial equity and social justice. The first components of our action plan are to expand this important conversation to all employees to begin a dialogue and create awareness, foster a culture of support, a safe pathway of communication to leadership, and actively pursue change through policy and programs. We understand that meaningful action starts with understanding the visible and non-visible ways that racism impacts our region and our industry. We are committed to cultivating and preserving a culture of inclusion and connectedness.

29

As we transform our business to meet the needs of future generations, we are fully committed to the environmental, social and governance priorities that matter most to our investors and other stakeholders.

Corporate Sustainability and Responsibility Report

30

The Board has the following standing committees: Audit Committee; Compensation Committee; Executive Committee; and Nominating and Governance Committee. The tables below provide a summary of each committee with respect to membership and primary responsibilities.

Audit Committee

 NOTES:

The Audit Committee is a separately-designated standing audit committee established in accordance with section 3(a)(58)(A) of the Exchange Act. Each member of the Committee is financially literate, knowledgeable and qualified to review financial statements. The Committee operates under a written charter, which it reviews annually, and adopts amendments, if necessary, to reflect changes governing financial reporting and accounting requirements or its responsibilities. The Audit Committee Report, which appears in the section entitled Audit Matters, more fully describes the activities and responsibilities of the Committee.

31

Compensation Committee

 NOTES:

The Compensation Committee operates under a written charter, which it reviews annually and, as appropriate, amends to reflect changes in its responsibilities. The specific activities and responsibilities of the Committee are described in greater detail in the section entitled Compensation Committee Operations.

Executive Committee

The Executive Committee operates under a written charter, which it reviews annually and, as appropriate, amends to reflect changes in its responsibilities. Committee membership includes the Chairman of the Board, the lead director, and the chairs of the Audit, Compensation, and Nominating and Governance Committees of the Board, as well as any additional Board members appointed at the discretion of the Board.

32

Nominating & Governance Committee

 NOTES:

The Nominating and Governance Committee operates under a written charter, which it reviews annually and, as appropriate, amends to reflect changes in its responsibilities.

All Committees

The existence and activities of all committees of the Board do not alter the traditional roles and responsibilities of Unitil’s management. All committees may delegate authority to individuals or subcommittees when they deem appropriate, subject to applicable laws, rules or regulations. However, in delegating authority, a committee shall not be absolved from the responsibilities designated under the terms of its respective charter. All committees shall undertake any other action or exercise such other powers, authority, duties and responsibilities as necessary or appropriate to the discharge of the duties and responsibilities set forth in their respective charters or our Bylaws, or otherwise required by the listing standards of the NYSE or other applicable laws, rules or regulations, or as shall otherwise be determined by or assigned by the Board.

The charters for each of the standing committees are available in the Corporate Governance section of the Investor Relations section of our website at unitil.com/investors, or in print to any shareholder or other interested party, free of charge upon request to the Office of the Secretary, Unitil Corporation, 6 Liberty Lane West, Hampton, NH 03842-1720; or to InvestorRelations@unitil.com; or by calling toll free 800-999-6501.

33

AUDIT COMMITTEE REPORT

The following report is submitted by the Audit Committee with respect to Unitil’s audited financial statements for the fiscal year ended December 31, 2020.

In discharging its oversight responsibility regarding the audit process, the Audit Committee has discussed with Deloitte & Touche LLP (“Deloitte”), the Company’s independent registered public accounting firm for the fiscal year ended December 31, 2020, the matters required to be discussed by the statement on Auditing Standards No. 61, as amended (AICPA, Professional Standards, Volume 1, AU Section 380), as adopted by the Public Company Accounting Oversight Board in Rule 3200T. In addition, the Committee has received the written disclosures and the letter from Deloitte required by applicable requirements of the Public Company Accounting Oversight Board regarding Deloitte’s communications with the Committee concerning independence and has discussed with Deloitte the firm’s independence with respect to Unitil.

During 2020, the Audit Committee members received Unitil’s quarterly financial information for review and comment prior to the filing of each of Unitil’s Forms 10-Q with the SEC. In fulfilling its responsibilities relating to the financial statements, the Committee also reviewed and discussed Unitil’s significant accounting policies and the audited financial statements for the fiscal year ended December 31, 2020, with management and Deloitte. Based on the review and discussions with management and Deloitte, the Committee recommended to the Board that the audited financial statements be included in Unitil’s Annual Report on Form 10-K for fiscal year ended December 31, 2020, for filing with the SEC.

Audit Committee Members

Suzanne Foster, Edward F. Godfrey, Michael B. Green (chair), Justine Vogel and David A. Whiteley

34

PRINCIPAL ACCOUNTANT FEES & SERVICES

The following table presents fees for professional services rendered by Deloitte, Unitil’s independent registered public accounting firm, for the fiscal years ended December 31, 2020, and December 31, 2019.

Audit Fees

In 2020 and 2019, this category includes fees incurred for professional services rendered by Deloitte for reviewing the quarterly financial statements included in our Quarterly Reports on Form 10-Q, auditing our annual financial statements included in our Annual Report on Form 10-K, and auditing our internal control over financial reporting.

Audit-Related Fees

In 2020, Deloitte did not perform any audit-related services. In 2019, this category includes fees incurred of approximately $30,000 for professional services rendered by Deloitte in connection with registration statements we filed with the Securities and Exchange Commission.

Tax Fees

In 2020 and 2019, Deloitte did not perform any tax services.

All Other Fees

In 2020 and 2019, Deloitte did not perform any services that are not included in the above categories.

AUDIT COMMITTEE PRE-APPROVAL POLICY

The Audit Committee has a formal policy concerning approval of audit and non-audit services to be provided by the independent registered public accounting firm engaged to audit our consolidated financial statements. The policy requires that all services to be provided by the independent registered public accounting firm, including audit services and permitted audit-related and non-audit services, must be pre-approved by the Committee. The Committee pre-approved all audit, audit-related, tax and all other services provided by Deloitte during fiscal 2020 and 2019.

35

COMPENSATION COMMITTEE OPERATIONS

The Compensation Committee is appointed annually by the Board and is responsible for oversight of the executive compensation program. The Committee has overall authority to establish goals and objectives and to interpret the terms of our compensation policies, including base salary, incentive compensation, equity compensation, and all benefits programs. The Committee discharges its oversight responsibilities by carrying out the specific functions and exercising the authority provided in its charter (the “Compensation Committee Charter”). See the section entitled Compensation - Compensation of Named Executive Officers - Compensation of Directors for information on the Nominating and Governance Committee’s work regarding Directors’ compensation.

The Committee has the authority to delegate some of its responsibilities to individuals or subcommittees of the Committee’s choice, subject to applicable laws, rules or regulations. However, such delegation does not absolve the Committee from the responsibilities that it bears under the terms of the Compensation Committee Charter.

The Committee has the authority to invite executive officers, members of management or other guests to attend its meetings, to perform research, or to provide relevant information or recommendations. In 2020, at the Committee’s request, the CEO and the Vice President of People, Shared Services and Organizational Effectiveness served the Committee in a consultative capacity, providing data and analytical support, as well as management perspective and recommendations relative to employee compensation and benefits, including executive compensation.

The Committee also has the authority to retain or obtain the advice of outside counsel, compensation consultants or other advisors to advise the Committee as it deems necessary. The Committee is directly responsible for the appointment, retention terms (including compensation), and oversight of the work of any adviser it retains. Prior to retaining or obtaining advice from an adviser, the Committee will consider factors relevant to the adviser’s independence from management to the extent required by the NYSE listing standards.

The Committee has periodically engaged a compensation consultant, Willis Towers Watson (“Willis Towers”), to provide compensation study data, including data from selected peer companies and compensation marketplace survey analysis, as well as to provide various recommendations based on study findings and industry trends for the Committee’s consideration. Willis Towers is engaged by and reports directly to the Compensation Committee. Willis Towers receives compensation only for services related to executive compensation, employee benefits and general compensation matters, and neither it nor any affiliated company provides any other services to us or our subsidiaries.

In October 2020, the Compensation Committee engaged Willis Towers to conduct a review of our Executive Stock Ownership Policy compared to competitive market practices for similar utility companies. The Committee requested the review in order to assess this policy with regard to the alignment with

36

competitive market practice in the context of holding requirements, time to achieve and level of long-term incentive compensation provided under the long-term incentive plan. The Committee elected to take no action with regard to the Executive Stock Ownership Policy, but may consider engagement of Willis Towers for further evaluation of long-term incentive compensation in 2021.

See the section entitled Compensation - Compensation Discussion and Analysis for additional information on the comprehensive compensation analysis prepared by Willis Towers in 2019 and the Committee’s work in 2019 regarding compensation-related matters for the 2020 compensation year.

In 2020, we incurred total expenses of $22,186 for services rendered by Willis Towers. The services were approved by the Compensation Committee as part of the Willis Towers 2020 engagement.

In addition, we requested and received information from Willis Towers to assist the Committee in determining whether its work raised any conflict of interest. Based on the responses provided by Willis Towers in its completed Conflict of Interest Questionnaire, there were no conflicts of interest in 2020.

COMPENSATION COMMITTEE INTERLOCKS & INSIDER PARTICIPATION

The current members of the Compensation Committee are not current or former officers or employees of Unitil. No member of the Committee has any relationship requiring disclosure under Item 404 of Regulation S-K, Transactions with Related Persons. In addition, none of our executive officers serve on the board of directors or compensation committee of another company where an executive officer of the other company also serves on the Board or Compensation Committee.

RISK AND BROAD-BASED COMPENSATION PROGRAMS

We believe the risks that may arise from our compensation policies and practices, which include, but are limited to, the annual incentive award performance metrics, variable and non-variable pay mix, and limited non-performance payouts are not likely to have a material adverse effect on us because of multiple factors that work together.

37

COMPENSATION DISCUSSION AND ANALYSIS

2020 PERFORMANCE REVIEW

Challenges:   As a Company, 2020 was one of the most challenging years we have ever faced. Our financial results in 2020 were significantly impacted by two atypical circumstances - the exceptionally warm winter heating season and the financial impact of the COVID-19 pandemic. At year end, we delivered 2020 earnings of $2.15 per share compared to $2.971 per share in 2019. We estimate that the negative financial impact of the warmer-than-normal winter was approximately $3.1 million, or $0.20 per share, and the negative financial impact of the COVID-19 pandemic was approximately $1.4 million, or $0.09 per share. Although these were not the financial results we had hoped for, we remain financially strong with a robust pipeline of future investment opportunities, and the foundational elements of our business - the safe, reliable and affordable delivery of electricity and natural gas to our customers – remain strong.

Successes:

While 2020 presented us with significant challenges on many levels, we accomplished noteworthy operational successes that are a testament to our resiliency and commitment to continued execution of the fundamentals of our business for sustained growth over the long term. A summary of some of these successes is below.

Customer Service

Safety

38

Employee Satisfaction

Sustainability

Infrastructure Investments

In addition to the operational successes noted above, we also continued to advance our long-term strategic planning efforts, specifically in the areas of Customer Choices, Advancing the Grid, Smart Heating and Transportation Solutions, and Future of Natural Gas. And we continued our unbroken record of annual dividend payments since Unitil common stock began trading on the open market in 1984 with an annualized dividend of $1.50 per share in 2020. On January 27, 2021, the Board of Directors voted to increase the 2021 annualized dividend to $1.52 per share.

EXECUTIVE COMPENSATION POLICIES

EXECUTIVE COMPENSATION RECOVERY POLICY

In the event we are required to prepare an accounting restatement of our financial statements due to the material noncompliance with any financial reporting requirement under the securities laws, we are entitled to recover any excess performance-based compensation² received by any current or former covered executive during the three-year period immediately preceding the date on which we are required to prepare an accounting restatement. To the extent allowed by applicable law and the listing standards of the New York Stock Exchange, we may seek to recover any such excess performance-based compensation at the direction of the Compensation Committee after consideration of the costs and benefits of doing so, and as approved by Board.

39

EXECUTIVE STOCK OWNERSHIP POLICY

appointment to obtain the required shares of stock. Additional information concerning the current share ownership of our Directors and officers can be found in the section entitled Share Ownership —Beneficial Ownership.

EXECUTIVE STOCK RETENTION POLICY

The Board believes that our executive officers should own a significant number of shares of our common stock to properly align their interests with those of our shareholders. All Named Executive Officers are required to hold all forms of equity received as compensation until retirement or other separation from the Company. The Board, in its sole discretion, may approve a waiver to this policy as circumstances may warrant. To date, no such waivers have been proposed or approved.

PROHIBITION ON HEDGING AND/OR PLEDGING COMPANY STOCK POLICY

All members of the Board and the executive officers are prohibited from engaging in short sales or engaging in any hedging transaction with respect to Unitil common stock, as well as engaging in any transactions that result in pledging, or using as collateral, shares of Unitil common stock in order to secure personal loans or other obligations, including any shares that may be held in a margin account.

Compensation Philosophy and Administration

40

(ii) provides appropriate rewards for the fulfillment of strong operational and financial performance and (iii) provides appropriate rewards for practicing our core values and principles, which creates lasting value for our shareholders and other stakeholders.

The Compensation Committee utilizes a set of guiding principles in the design and implementation of the Company’s executive compensation program, which are outlined above. The primary goal of the guiding principles is to ensure consistency and fairness in all aspects of the Committee’s oversight of compensation policy. Additional information concerning the processes and operational procedures followed by the Committee can be found in the section entitled Compensation—Compensation Committee Operations.

Compensation Policy & Process

The principal objective of our executive compensation program is to attract, motivate, retain and reward highly qualified employees who are committed to the achievement of solid financial performance, outstanding service to customers, and excellence in the management of our assets. It is our belief that a strong sense of teamwork and shared responsibility are vital to achieving strong performance. Our incentive compensation reflects and supports this philosophy with an appropriate balance of financial and operational goals that apply to the entire management team. See the section entitled Compensation - Compensation Discussion and Analysis - Elements of Compensation for a discussion of the specific goals set, and results achieved, for 2020. We also believe that retention of talented and dedicated key executives will help ensure continued focus on the achievement of long-term growth in shareholder value and overall sustainability, which in turn will provide significant benefits to all of our stakeholders, including shareholders, customers and employees.

41

Compensation Policy – What We Do and What We Don’t Do

The Compensation Committee continuously strives to make improvements to our executive compensation policies. Below is a summary of what we do and what we do not do with respect to executive compensation, the totality of which the Committee and the Board believe aligns with the long-term interests of our shareholders as well as with today’s commonly accepted best practices in the market.

* The Committee defines “annual compensation” in its Guiding Principles as “base salary, cash incentive and equity compensation.”

Compensation Decisions for 2020

In 2019, the Committee engaged Willis Towers to conduct a comprehensive review and assessment of senior management compensation, including CEO, CFO, and other Named Executive Officers’ compensation, non-union employee compensation, employee benefits, and Directors’ compensation (the “2019 Compensation Analysis” or the “Analysis”) in the context of market practices and our Compensation Philosophy. The Committee requested Willis Towers provide an assessment of current levels of competitive compensation and broad-based benefit programs to use as a tool to assist the Committee with its decisions concerning 2020 compensation.

The Committee’s standard practice is to engage a compensation consultant to prepare a comprehensive study of all elements of compensation approximately every five years, with updates on executive compensation annually or as needed. The last comprehensive analysis was performed in 2014.

42

2019 Compensation Analysis - Summary

Compensation Data from Published Compensation Surveys

Compensation data from published compensation surveys focused on comparably sized organizations in the utility sector and general industry sector (for “cross industry” positions)⁴. Published survey data were size-adjusted based on revenue, employee regression and/or scope parameters. Because the surveys are confidential, the specific data selected by Willis Towers did not indicate survey participants by company name.

43

Compensation Data from Proxy Filings

Compensation data was also extracted from the 2019 Peer Group proxy filings. The Compensation Committee used this data to analyze only the CEO’s and CFO’s compensation, with the objective of ensuring that CEO and CFO total compensation was reasonable, competitive and consistent with pay practices at peer companies.

Methodology: Published Surveys

Methodology: Peer Group Proxy Filings

44

Salary Administration

Our Salary Administration Policy has three objectives:

The Salary Administration Policy includes three important components:

Job Description Every employee of the Company has a job description that represents his or her position within the Company. All job descriptions are written using a requisite format describing the position purpose, principal accountabilities, competencies, challenges, decision making authority, qualifications, and scope and quantitative dimensions.   Job Evaluation We use a variety of published salary sources and survey data to assist in the review and evaluation of non-executive, non-union job descriptions in order to confirm reasonable and appropriate base compensation for each position. See also the section entitled Compensation - Base Salary below. This practice provides for internal equity between comparable positions as well as external comparability with other companies. The end result of the job evaluation process is that each job is assigned a pay grade that translates into a salary range. Executive level positions (including the Named Executive Officers) are reviewed and evaluated independently by Willis Towers.

45

Market Analysis & Salary Range

Each year we participate in numerous salary market studies to ensure that the competitiveness of base salaries is maintained. We adjust the salary ranges each year based upon the results of these surveys to ensure that we maintain our salary ranges at the median market level. Historically, the salary ranges are adjusted by approximately 2% annually based on market survey data. The midpoint of the base salary range is set at the median level of the broad-based published compensation survey group when compared to similar positions at comparable companies. The minimum in the salary range is determined by multiplying the midpoint by 80%, and the maximum is determined by multiplying the midpoint by 120%. In general, the salary range minimum is commonly the lowest amount we will pay a new employee in the job, with the aim of employees reaching the midpoint of the range within five years. The midpoint is where we strive to pay fully trained, fully competent employees. The midpoint to maximum range is where high-performing employees and long-term employees tend to be paid. Exceptions are occasionally made based on experience, skills, education, and other factors.

Base Salary

We set base salary ranges for every job grade and position based upon salary survey data provided by Willis Towers and in accordance with the Salary Administration Policy described above. In relation to each Named Executive Officer, base salary is set within the salary range based upon individual experience, skills, and education, as well as performance relative to individual annual goals. This process is used for both executive and non-executive positions.

Incentive Compensation – Cash Incentive

We set annual target cash incentive awards equal to the median of the broad-based published compensation survey group for the executive officers’ target cash incentive awards at other comparable companies based on data provided by Willis Towers. The Committee also used information from the proxy statements of our peer group, at the 25^th percentile target, as a secondary source to set the CEO’s and CFO’s annual target cash incentive award. We have developed a “balanced score card” approach to setting goals for the annual incentive awards, which includes certain goals from the Strategic Plan that represent success in financial results, electric reliability, gas safety, customer service and distribution cost per customer. The Compensation Committee approves the quantitative goals, also referred to as performance metrics, for these awards annually. See the section entitled Compensation - Compensation Discussion and Analysis— Elements of Compensation for a discussion of the balanced score card.

Incentive Compensation – Equity Compensation

We grant shares of restricted stock to executive participants in the Stock Plan annually. The size of the annual restricted stock award is based upon our achievement of the key performance metrics, which are selected from the Strategic Plan and approved by the Compensation Committee. Each participant’s target award is based on market data for the median of the broad-based published compensation survey group size grant at peer group and other comparable companies, as calculated using data provided by Willis Towers. The Compensation Committee also uses information from the proxy statements of our peer group,

46

at the 25^th percentile target, as a secondary source to set the CEO’s and CFO’s target restricted stock award. The shares of restricted stock vest over a period of four years, and all Named Executive Officers are required to hold all forms of equity, vested or unvested, received as compensation until retirement or other separation from Unitil. The Board, in its sole discretion, may approve a waiver to this policy as circumstances may warrant. However, to date, no such waiver has been requested or granted.

CEO Pay Ratio

Summary

As required by the Dodd-Frank Wall Street Reform and Consumer Protection Act of 2010 (the “Dodd-Frank Act”), the Securities and Exchange Commission adopted a rule requiring annual disclosure of the ratio of the median employee’s annual total compensation to the total annual compensation of the principal executive officer. Our principal executive officer is Mr. Meissner (the “CEO”).

We believe the compensation program and salary administration policy should be consistent and internally equitable to motivate all employees to perform in ways that enhance shareholder value. We also believe that our compensation philosophy and processes yield an equitable result for all employees, which is reflected in the resulting ratio.

Methodology

To reasonably identify the median employee, we prepared a list of all active employees (excluding the CEO) as of December 31, 2020. The list included part-time employees. As of December 31, 2020, we employed 512 people of which 347 were non-union employees and 165 were union employees covered by a collective bargaining agreement.

Next, we extracted the taxable wages number reported in Box 1 of the 2020 Form W-2 from our payroll records for each employee, excluding the CEO. We did not annualize wages and salaries for those employees that were not employed for the full year of 2020. The median employee was then identified. Once identified, we calculated the median employee’s total annual compensation in the same manner as the “Total Compensation” shown for the CEO in the Summary Compensation Table in the section entitled Compensation – Compensation of Named Executive Officers.

47

Results

The table below shows the information used for the calculation of the ratio of the estimated annual total compensation of the median employee identified using the methodology described above to the annual total compensation of Mr. Meissner as calculated for the Summary Compensation Table.

NOTES :

48

governance-related policies. The Compensation Committee remains committed to this objective. Details on all compensation and governance-related policies are outlined in the section of this proxy statement entitled Corporate Governance.

Our 2021 say-on-pay proposal is included in this proxy statement as Proposal 3: Approval, on an Advisory Basis, of the Compensation of the Company’s Named Executive Officers.

49

ELEMENTS OF COMPENSATION

Base Salary

Every employee is paid a base salary. The purpose of base salary is to reward employees for the expertise and value they bring to their jobs. Base salary is determined according to our salary policy, which assigns each position a grade and a corresponding salary range. We set salary ranges for every position based upon comparative salary data provided by Willis Towers. The midpoint of the salary range is set at the median level of the broad-based published compensation survey group when compared to similar positions at comparable companies. The minimum parameter in the salary range is determined by multiplying the midpoint by 80%, and the maximum parameter is determined by multiplying the midpoint by 120%. The salary range is then used to manage each employee’s salary, which is based on merit, within the range. For each employee (including Named Executive Officers), base salary is set within the salary range based upon individual performance relative to individual annual goals. The elements of individual performance differ depending on the individual position, but generally include: quality of work; successful completion of established goals; ability to initiate creative solutions; adaptability to change; and impact on our overall performance. The salaries of all employees (including the Named Executive Officers) are reviewed annually, as well as at the time of a promotion or change in responsibilities.

of our competitive compensation guiding principles, which is to ensure that employees are paid at or near the market median of the broad-based published compensation survey group. Merit increases may also be adjusted by the Compensation Committee to reflect the market value of a job when compared to similar positions at other companies within our peer group, as recommended by Willis Towers.

The process followed to determine base salary increases for the Named Executive Officers begins with an annual summary and evaluation of Unitil’s overall performance provided to the Board by the CEO, which generally occurs in mid-January. The Compensation Committee and the Executive Committee meet jointly in executive session to discuss the evaluation of our overall performance, as well as to discuss the CEO’s performance in relation to our performance for the year, taking into account both the quantitative and qualitative aspects of the performance of both the CEO and Unitil as a whole. The Compensation Committee uses the feedback gained in the joint meeting along with the market competitive salary information previously described to determine an appropriate base salary increase for the CEO based on both merit and market conditions. The CEO provides a recommendation to the Compensation Committee for base salary increases for the other Named Executive Officers. The Compensation Committee then reviews and recommends the

50

base salaries of all of the Named Executive Officers to the full Board for discussion and approval. The Committee’s recommendations are based on the performance evaluations and market information for each of the Named Executive Officers. For 2020, each Named Executive Officer received the base salary increase percentage set forth opposite his or her name in the table above. Ms. Vaughan’s negative 2020 salary increase reflects only her salary for the period of employment prior to resignation in 2020, which was January 1 – March 16, 2020.

Incentive Compensation

Management Incentive Plan

The Unitil Corporation Management Incentive Plan (the “Management Incentive Plan”) provides annual cash incentive payments based upon the attainment of specified goals selected from the Strategic Plan. The Compensation Committee selects participants in the plan and establishes their individual target awards. All

For the annual incentive awards, annual quantitative performance goals are established by the Compensation Committee. These goals, which relate to key performance metrics selected from the Strategic Plan, are the same for all employees (including executive officers) to ensure that employees are focused on common bottom-line business, customer service, and operational results. These goals are discussed below in the subsection entitled Incentive Compensation Performance Metrics and Goals. Under the Management Incentive Plan, executive officers receive a cash award if the quantitative goals that are set by the Committee are met. Each executive officer’s Management Incentive Plan target award is established as a percentage of base salary based on the market median of the broad-based published compensation survey group for his or her position when compared to other comparable companies, calculated using data provided by Willis Towers. The Committee also used information from the proxy statements of our peer group, at the 25^th percentile target, as a secondary source to set the CEO’s and CFO’s Management Incentive Plan target award. The table above shows the Management Incentive Plan target awards for 2020 as a percentage of base salary for the Named Executive Officers.

Actual awards may be less than or greater than the target awards depending upon actual results achieved. In addition, the Committee has the authority to increase or decrease the annual incentive award under our incentive plans, including the Management Incentive Plan, and restricted stock awards under the Stock Plan. The Committee also has the authority to decide to pay no award when one would otherwise be paid. The Committee has in the past exercised its discretion to both increase and decrease award payments when

51

such calculation did not properly balance the interests of employees and shareholders, but chose not to do so from 2013 through 2019. With regard to the award for 2020 results, the Committee exercised its authority to adjust the award. For additional information on the Committee’s decision to adjust the award, please see the subsection entitled Incentive Compensation Performance Metrics and Goals.

Second Amended and Restated 2003 Stock Plan    

value over the long term. The details of the stock ownership and retention requirements are discussed in greater detail below.

Generally, in late January or early February of each year, the Committee approves annual awards of restricted stock to current executive officers and employee participants in the Stock Plan based upon the attainment of a set of specified goals as discussed above. As with the annual cash incentive awards, target awards are established for each participant that generally vary based upon the job grade level of each participant’s position in accordance with survey data provided by Willis Towers. Each executive officer’s target restricted stock award is set by the Committee based upon recommendations from Willis Towers, with the goal of granting a target award with a value equal to the market median of the broad-based published compensation survey group at the time of grant, which translates to the Stock Plan target award value being set as the job grade salary range midpoint.

52

reduces both the dilutive effect of the Stock Plan by granting fewer shares than would otherwise be granted, and the volatility of the Company’s stock in the market by eliminating stock sales that would otherwise be completed to pay personal income taxes. The net restricted stock award provides a market competitive award while minimizing both dilution and volatility.

Stock Ownership and Holding Requirement for Executive Officers

own shares of Unitil common stock in the equivalent value of a multiple of base salary. All shares of Unitil common stock that are owned directly or beneficially, shares of restricted stock that are awarded, whether vested or unvested, as well any shares of stock held in the Unitil Stock Fund of the Tax Deferred Savings and Investment Plan will be counted towards the required total. Any newly appointed Named Executive Officer will have four years from the date of appointment to obtain the required shares of stock. The required equivalent value for all Named Executive Officers is recalculated annually on January 1. As of the date of this proxy statement, all Named Executive Officers have met the ownership requirement, with the exception of Mr. Hevert, who began his employment with us on July 23, 2020. Mr. Hevert will have until July 2024 to meet the share ownership requirement.

All Named Executive Officers are also required to hold all forms of equity received as compensation until retirement or other separation from the Company. The Board, in its sole discretion, may approve a waiver to this policy as circumstances may warrant. To date, no such waivers have been proposed or approved.

53

Additional information concerning the share ownership of Named Executive Officers can be found in the section of this proxy statement entitled Share Ownership - Beneficial Ownership.

Incentive Compensation Performance Metrics and Goals

We have two compensation plans in which the Named Executive Officers participate where performance metrics and goals are integrally and directly linked to the compensation awarded—the Management Incentive Plan and the Stock Plan. The performance metrics and goals are also directly linked to the Strategic Plan.

Selecting the Performance Metrics and Setting the Goals

Performance metrics and goals are recommended by management annually as part of the strategic planning process. In the Strategic Plan, performance metrics and goals are aligned with the strategies defined for the coming year. The Strategic Plan includes suggested targets for each performance metric, which are reviewed and approved by the Board each year. The Compensation Committee then selects the key performance metrics to be applied to the Management Incentive Plan and the Stock Plan.

		When selecting the key performance metrics, the Committee considers a number of factors, including the appropriate mix of financial, operations, and customer-centric metrics, as well as the obligation to meet the various state public utility regulatory requirements to include a certain percentage of operations and customer-focused metrics. The Committee also reviews prior years’ goals and results to ensure stretch goals are set, and may also consider recommendations from Willis Towers when selecting the optimal combination for the coming year. The Committee believes that a prudently set and balanced mix of key performance metrics provides the opportunity, and the incentive, for all employees to contribute to our measurements of success.

54

The table below shows the performance metrics selected and goals set by the Committee for the

2020 annual incentive awards under our incentive plans, including the Management Incentive Plan and the Stock Plan, as well as the performance results calculated for 2020.

2020 PERFORMANCE METRICS, GOALS AND RESULTS