UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

SCHEDULE 14A

(Rule 14A – 101)

Proxy Statement Pursuant to Section 14(a) of the

Securities Exchange Act of 1934

Filed by the Registrant  ☒                             Filed by a Party other than the Registrant  ☐

Check the appropriate box:

ONE Gas, Inc.

(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):

MISSION

We deliver natural gas for a better tomorrow.

VISION

To be a premier natural gas distribution company creating exceptional value for our stakeholders.

STRATEGY

Becoming ONE:

CORE VALUES

April [__], 2018

Dear Shareholder:

You are cordially invited to attend the Annual Meeting of Shareholders of ONE Gas, Inc., which will be held at 9:00 a.m. Central Daylight Time on Thursday, May 24, 2018, at our company headquarters at ONE Gas, Inc., First Place Tower, 15 E. Fifth Street, 2^nd Floor, Tulsa, Oklahoma 74103.

The matters to be considered and voted on at the meeting are set forth in the attached Notice of Annual Meeting of Shareholders and are described in the attached proxy statement. A copy of our 2017 annual report to shareholders is also enclosed. A report on our 2017 performance will be presented at the meeting.

We look forward to greeting as many of our shareholders as possible at the annual meeting. We know, however, that most of our shareholders will be unable to attend. Therefore, proxies are being solicited so that each shareholder has an opportunity to vote by proxy. You can authorize a proxy over the Internet or by telephone. Instructions for using these convenient services are included in the proxy statement and on the proxy card. Of course, if you prefer, you may vote by mail by signing, dating and returning the enclosed proxy card in the enclosed postage-paid envelope.

If your shares are held by a broker, bank or other holder of record, unless you provide your broker, bank or other holder of record with your instructions on how to vote your shares, your shares will not be voted in the election of directors or in certain other important proposals as described in the accompanying proxy statement. Consequently, please provide your voting instructions to your broker, bank or other holder of record in a timely manner in order to ensure that your shares will be voted.

YOUR VOTE IS IMPORTANT – Regardless of the number of shares you own, your vote is important. I urge you to submit your proxy as soon as possible so that you can be sure your shares will be voted.

Thank you for your investment in ONE Gas and for your continued support.

Sincerely,

JOHN W. GIBSON

Chairman of the Board

ONE GAS, INC. NOTICE OF 2018 ANNUAL MEETING OF SHAREHOLDERS

PROXY STATEMENT

This proxy statement describes important issues affecting our company and is furnished in connection with the solicitation of proxies by our Board for use at our 2018 Annual Meeting of Shareholders to be held at the time and place set forth in the accompanying notice.

Unless we otherwise indicate or unless the context indicates otherwise, all references in this proxy statement to “ONE Gas”, “we,” “our,” “us,” the “company” or similar references mean ONE Gas, Inc. and its subsidiaries, references to “ONEOK” mean ONEOK, Inc. and its subsidiaries, and references to the “Board” or “Board of Directors” mean the Board of Directors of ONE Gas, Inc.

For more than 100 years, our business has delivered natural gas to our customers. We will continue to focus on operating safely and responsibly, while creating shareholder value.

SAFETY AND HEALTH

The safety of our employees, our customers and the communities where we operate is at the forefront of each business decision we make. By monitoring the integrity of our assets and promoting the safety and health of our employees, customers and communities, we are investing in the long-term sustainability of our businesses.

A substantial part of our workforce is comprised of operations specialists who work regularly in the field. We continuously assess the risks our employees face in their jobs, and we work to mitigate those risks through training, appropriate engineering controls, work procedures and other preventive safety and health programs. Reducing incidents and improving our safety incident rates is important, but we are not focused only on statistics. Low incident rates alone cannot prevent a large-scale incident, which is why we continue to focus on enhancing our preventive safety programs, such as near-miss reporting, vehicle-safety monitoring, risk assessment and others.

2017 Safety and Health Performance Updates and Highlights

ENVIRONMENTAL PERFORMANCE

2017 Environmental Updates and Highlights

COMMUNITY INVESTMENT

We are committed to being active members of the communities where we operate. Investing in the areas where we have operations and where our employees live and work is not only the right thing to do–it’s smart business. By contributing financially and through volunteer work, we can help build stronger communities and create a better environment for our employees, our customers and the general public.

We accomplish this in a number of ways, including grants from the ONE Gas Foundation, corporate sponsorships to nonprofit organizations and community volunteer efforts. Primary focus areas for our community investments are education, health and human services, arts and culture, environmental stewardship and community enrichment. We give priority consideration to educational programs and to health and human services organizations, particularly those with programs that help people become self-sufficient.

2017 Community Investment Updates and Highlights

POLITICAL ADVOCACY AND CONTRIBUTIONS

We actively participate in the political process through the lobbying efforts of our government relations department, involvement in multiple business and industry trade organizations, and through the ONE Gas, Inc. Employee Political Action Committee (the “ONE Gas PAC”). In 2017, ONE Gas employees and members of the ONE Gas Board contributed approximately $76,557 to the ONE Gas PAC. During 2017, the ONE Gas PAC contributed approximately $38,900 to candidates for political office and other political action committees.

As a company, we do not contribute corporate funds to political candidates, political action committees or so-called 501(c)(4) social welfare organizations. Employee and director contributions to the ONE Gas PAC are used to support candidates seeking federal or state offices who support the interests of the energy industry and business. A steering committee made up of senior management representatives and a contributions committee made up of employees from across our operating areas oversee all ONE Gas PAC contributions to political candidates.

VOTING

Only shareholders of record at the close of business on March 26, 2018, are entitled to receive notice of and to vote at the annual meeting. As of that date, [                    ] shares of our common stock were outstanding. Each outstanding share entitles the holder to one vote on each matter submitted to a vote of shareholders at the meeting. No other class of our stock is entitled to vote on matters to come before the meeting.

Shareholders of record may vote in person or by proxy at the annual meeting. All properly submitted proxies received prior to the commencement of voting at the annual meeting will be voted in accordance with the voting instructions contained on the proxy. Shares for which signed proxies are properly submitted without voting instructions will be voted:

While we know of no other matters that are likely to be brought before the meeting, in the event any other business properly comes before the meeting, proxies will be voted in the discretion of the persons named in the proxy. The persons named as proxies were designated by our Board.

To vote shares held “in street name” through a bank, broker or other holder of record, a shareholder must provide voting instructions to his or her bank, broker or other holder of record. Brokerage firms, banks and other holders of record are required to request voting instructions for shares they hold on behalf of their customers and others. We encourage you to provide instructions to your bank, broker or other holder of record on how to vote your shares. If your shares are held “in street name,” to be able to vote those shares in person at the annual meeting, you must obtain a legal proxy, executed in your favor, from the holder of record of those shares as of the close of business on March 26, 2018.

The rules of the NYSE determine whether proposals presented at shareholder meetings are routine or non-routine. If a proposal is routine, a broker or other entity holding shares for an owner in street name may vote for the proposal without receiving voting instructions from the owner under certain circumstances. If a proposal is non-routine, the broker or other entity may vote on the proposal only if the owner has provided voting instructions. A “broker non-vote” occurs when the broker or other entity is unable to vote on a proposal because the proposal is non-routine and the owner does not provide any voting instructions. Under the rules of the NYSE, Proposals 1, 3, 4 and 5 are considered to be non-routine, and Proposal 2 is considered to be routine. Accordingly, if you do not provide voting instructions to your brokerage firm or other entity holding your shares, your brokerage firm or other entity holding your shares will not be permitted under the rules of the NYSE to vote your shares on Proposals 1, 3, 4 and 5 and will be permitted under the rules of the NYSE to vote your shares on Proposal 2 at its discretion.

Please provide your voting instructions to your broker, bank or other holder of record so that your shares may be voted.

Representatives of our stock transfer agent, EQ Shareholder Services, a division of Equiniti Trust Company, will be responsible for tabulating and certifying the votes cast at the annual meeting.

QUORUM

The holders of a majority of the shares entitled to vote at the annual meeting, present in person or by proxy, constitute a quorum for the transaction of business at the annual meeting. In determining whether we have a quorum, we count abstentions and broker non-votes as present.

If a quorum is not present at the scheduled time of the meeting, the shareholders who are present in person or by proxy may adjourn the meeting until a quorum is present. If the time and place of the adjourned meeting are announced at the time the adjournment is taken, no other notice will be given. However, if the adjournment is for more than 30 days, or if a new record date is set for the adjourned meeting, a notice will be given to each shareholder entitled to receive notice of, and to vote at, the meeting.

MATTERS TO BE VOTED UPON

At the annual meeting, the following matters will be voted upon:

VOTES REQUIRED

Proposal 1 — Election of three Class I Directors. Our bylaws provide for majority voting for directors in uncontested elections. We expect that the election of directors at our 2018 annual meeting will be uncontested. Under the majority voting standard, to be elected a nominee must receive a number of “For” votes that exceeds 50 percent of the votes cast with respect to that director’s election. Abstentions and broker non-votes, if any, do not count as votes cast with respect to the election of directors.

Our corporate governance guidelines require that if an uncontested nominee for director does not receive more “For” than “Against” votes, he or she must promptly tender his or her resignation to our Board. The Board (excluding the director who tendered the resignation) will then evaluate the resignation in light of the best interests of our company and our shareholders in determining whether to accept or reject the resignation, or whether other action should be taken. The Board will announce publicly its decision regarding any tendered resignation.

Proposal 2 — Ratification of Selection of PricewaterhouseCoopers LLP as our Independent Registered Public Accounting Firm for the Year ending December 31, 2018. In accordance with our bylaws, approval of this proposal requires the affirmative vote of a majority of the voting power of the shareholders present in person or by proxy and entitled to vote on this proposal at the meeting. Abstentions will have the same effect as votes against this proposal.

Proposal 3 — Advisory Vote on Executive Compensation. In accordance with our bylaws, approval of the proposal to approve our executive compensation requires the affirmative vote of a majority of the voting power of the shareholders present in person or by proxy and entitled to vote on this proposal at the meeting. Abstentions will have the same effect as votes against this proposal and broker non-votes do not count as entitled to vote for purposes of determining the outcome of the vote on this proposal. The vote on this proposal is advisory and non-binding on the company and our Board.

Proposal 4 — Approval of the ONE Gas, Inc. Amended and Restated Equity Compensation Plan (2018). In accordance with our bylaws, approval of the proposal to amend and restate the ONE Gas, Inc. Equity Compensation Plan requires the affirmative vote of a majority of the voting power of the shareholders present in person or by proxy and entitled to vote on this proposal at the meeting. Abstentions will have the same effect as votes against this proposal and broker non-votes do not count as votes cast and have no effect on the vote for purposes of determining the outcome of the vote on this proposal.

Proposal 5 — Approval of the amended and restated Certificate of Incorporation to eliminate the classified structure of our Board, provide for the annual election of directors and allow shareholder removal of directors with or without cause. In accordance with our Certificate of Incorporation, approval of the proposal to amend and restate our Certificate of Incorporation to eliminate the classified structure of our Board, provide for the annual election of directors and allow shareholder removal of directors with or without cause requires the affirmative vote of at least eighty percent (80%) of the shares of our common stock outstanding as of the record date. Abstentions, the failure of a shareholder to vote, and broker non-votes will have the effect of a vote against the proposal.

REVOKING A PROXY

Any shareholder may revoke his or her proxy at any time before it is voted at the meeting by (1) notifying our corporate secretary in writing (the mailing address of our corporate secretary is Corporate Secretary, ONE Gas, Inc., 15 East Fifth Street, Tulsa, Oklahoma 74103), (2) authorizing a later proxy via the Internet or by telephone, (3) returning a later dated proxy card, or (4) voting at the meeting in person. A shareholder’s presence without voting at the annual meeting will not automatically revoke a previously delivered proxy and any revocation during the meeting will not affect votes previously taken.

If your shares are held in a brokerage account or by a bank or other holder of record, you may revoke any voting instructions you may have previously provided in accordance with the revocation instructions provided by the broker, bank or other holder of record.

PROXY SOLICITATION

Solicitation of proxies will be primarily by mail and telephone. We have engaged Morrow Sodali LLC, 470 West Avenue, Stamford, Connecticut 06902, to solicit proxies for a fee of $11,000 plus out-of-pocket expenses. In addition, certain of our officers, directors and employees may solicit proxies on our behalf in person or by mail, telephone, fax or email, for which such persons will receive no additional compensation. We will pay all costs of soliciting proxies. We will also reimburse brokerage firms, banks and other custodians, nominees and fiduciaries for their reasonable expenses for forwarding proxy materials to our shareholders.

Our Board and management are committed to maintaining strong corporate governance practices that allocate rights and responsibilities among our Board, management and our stakeholders in a manner that benefits the long-term interests of our stakeholders. Our corporate governance practices are designed not just to satisfy regulatory and stock exchange requirements but also to provide for effective oversight and management of our company.

Our Corporate Governance Committee engages in a regular process of reviewing our corporate governance practices, including comparing our practices with those recommended by various corporate governance authorities, the expectations of our stakeholders and the practices of other leading public companies. Our Corporate Governance Committee also regularly reviews our corporate governance practices in light of proposed and adopted laws and regulations, including the rules of the Securities and Exchange Commission and the rules and listing standards of the NYSE.

CORPORATE GOVERNANCE GUIDELINES

Our Board has adopted corporate governance guidelines that address key areas of our corporate governance, including: director qualification standards, including the requirement that a majority of our directors be “independent” under the applicable independence requirements of the NYSE; director responsibilities; director access to management; director compensation; management succession; evaluation of the performance of our Board; and the structure and operation of our Board. Our Board periodically reviews our corporate governance guidelines and may revise the guidelines from time to time as conditions warrant. The full text of our corporate governance guidelines is published on and may be printed from our website at www.ONEGas.com and is also available from our corporate secretary upon request.

CODE OF BUSINESS CONDUCT AND ETHICS

Our Board has adopted a code of business conduct and ethics that applies to our directors, officers (including our principal executive and financial officers, controller and other persons performing similar functions) and all other employees. We require all directors, officers and employees to adhere to our code of business conduct and ethics in addressing the legal and ethical issues encountered in conducting their work for our company. Our code of business conduct and ethics requires that our directors, officers and employees avoid conflicts of interest, comply with all applicable laws and other legal requirements, conduct business in an honest and ethical manner and otherwise act with integrity and in our company’s best interests. All directors, officers and employees are required to report any conduct that they believe to be an actual or apparent violation of our code of business conduct and ethics.

The full text of our code of business conduct and ethics is published on and may be printed from our website at www.ONEGas.com and is also available from our corporate secretary upon request. We intend to disclose on our website any future amendments to, or waivers from, our code of business conduct and ethics, as required by the rules of the Securities and Exchange Commission and the NYSE.

DIRECTOR INDEPENDENCE

Our corporate governance guidelines provide that a majority of our Board of Directors will be “independent” under the applicable independence requirements of the NYSE. These guidelines and the rules of the NYSE provide that, in qualifying a director as “independent,” the Board must make an affirmative determination that the director has no material relationship with our company, either directly or as a partner, shareholder or officer of an organization that has a relationship with our company. In making this determination with respect to each director serving on the Executive Compensation Committee, under the rules of the NYSE, the Board is required to consider all factors specifically relevant to determine whether the director has a relationship to our company which is material to that director’s ability to be independent from management in connection with the duties of a member of that committee.

Our Board of Directors has also adopted director independence guidelines that specify the types of relationships the Board has determined to be categorically immaterial. Directors who meet these standards are considered to be “independent.” The full text of our director independence guidelines is published on and may be printed from our website at www.ONEGas.com and is also available from our corporate secretary upon request.

Our Board has determined affirmatively that members Robert E. Evans, Michael G. Hutchinson, Pattye L. Moore, Eduardo A. Rodriguez and Douglas H. Yaeger have no material relationship with our company, and each qualifies as “independent” under our corporate governance guidelines, our director independence guidelines and the rules of the NYSE. In determining whether certain of our directors qualify as “independent” under our director independence guidelines, our Board considered the receipt by certain directors or their immediate family members (or entities of which they are members, directors, partners, executive officers, or counsel) of natural gas service from us at regulated rates on terms generally available to all of our customers (and, in the case of an entity, in an amount that is less than the greater of $1 million or 2 percent of the entity’s gross revenue for its last fiscal year). In each case, the Board determined these relationships to be in the ordinary course of business at regulated rates or on substantially the same terms available to non-affiliated third parties and to be immaterial in amounts to both our company and the director.

BOARD LEADERSHIP STRUCTURE

During 2017, our Board was led by John W. Gibson, who was the Chairman of the Board, and Eduardo A. Rodriguez, who was both our lead independent director and the chair of the Corporate Governance Committee. In addition, our Audit Committee and Executive Compensation Committee are each led by a chair and vice chair, each of whom is an independent director.

LEAD INDEPENDENT DIRECTOR

Our corporate governance guidelines vest the lead independent director who, under these guidelines, is also chair of our Corporate Governance Committee, with various key responsibilities. The guidelines provide that the lead independent director shall serve for a term of three to five years as determined by the Board, and that the duties of the lead independent director include but are not limited to:

In addition, the lead independent director has the authority to call meetings of the independent directors and, if requested by major shareholders, will be reasonably available for consultation and direct communication with such shareholders. The Lead Independent Director may also perform duties otherwise assigned to the Chairman of the Board, as set forth above, when the offices of the Chairman of the Board and the CEO are combined.

SUCCESSION PLANNING

A key responsibility of the CEO and the Board is ensuring that an effective process is in place to provide continuity of leadership over the long term at all levels in our company. Each year, succession-planning reviews are held at every significant organizational level of the company, culminating in a full review of senior leadership talent by our independent directors. During this review, the CEO, the Chairman of the Board and the independent directors discuss future candidates for senior leadership positions, succession timing for those positions and development plans for the highest-potential candidates. This process ensures continuity of leadership over the long term, and it forms the basis on which our company makes ongoing leadership assignments. It is a key success factor in managing the long-term planning and investment lead times of our business.

In addition, the CEO maintains in place at all times, and reviews with the non-management directors, a confidential plan for the timely and efficient transfer of responsibilities in the event of an emergency or sudden incapacitation or departure of the CEO.

OUR BOARD AND CORPORATE STRATEGY

Our Board is actively involved in overseeing, reviewing and guiding our corporate strategy. Our Board formally reviews our company’s business strategy, including the risks and opportunities facing our company and its business, at an annual strategic planning session. Our Board regularly discusses corporate strategy throughout the year with management formally as well as informally and during executive sessions of the Board as appropriate. As discussed in “Risk Oversight” below, our Board views risk management and oversight as an integral part of our strategic planning process, including mapping key risks to our corporate strategy and seeking to manage and mitigate risk. Our Board also views its own composition as a critical component to effective strategic oversight. Accordingly, our Board and relevant Board committees consider our business strategy and the company’s regulatory, geographic and market environments when assessing board composition, director succession, executive compensation and other matters of importance.

SHAREHOLDER ENGAGEMENT

Our Board believes that accountability to shareholders is a mark of good corporate governance and that regular shareholder engagement is important to our company’s success. Our company frequently engages with shareholders on a variety of topics, with particular focus on matters relating to our company’s publicly disclosed strategy and financial performance. Our company also engages with shareholders to discuss matters relating to governance, compensation, safety, environmental and other current and emerging issues that the Board and our management understand are important to our shareholders. In addition to this direct engagement, our company also maintains a number of complementary mechanisms that allow our shareholders to effectively communicate to our Board, including:

RISK OVERSIGHT

We have integrated a comprehensive Enterprise Risk Management (“ERM”) process as part of strategy setting and driving performance throughout the organization, which includes identifying, aggregating, monitoring, measuring, assessing and managing risks that could affect our ability to fulfill our business objectives or execute our corporate strategy. These risks generally relate to strategic, operational, financial, regulatory compliance and human resources issues. Our ERM approach is overseen by our Chief Financial Officer and is designed to enable our Board to establish a mutual understanding with management of the effectiveness of our risk-management practices and capabilities, to review our risk exposure and to elevate certain key risks for discussion at the Board level. Management and our Board believe that risk management is an integral part of our annual strategic planning process, which addresses, among other things, the risks and opportunities facing our company.

Not all risks can be dealt with in the same way. Some risks may be easily perceived and controllable, and other risks are unknown; some risks can be avoided or mitigated by particular behavior, and some risks are unavoidable as a practical matter. For some risks, the potential adverse impact would be minor and, as a matter of business judgment, it may not be appropriate to allocate significant resources to avoid the adverse impact. In other cases, the adverse impact could be significant, and it is prudent to expend resources to seek to avoid or mitigate the potential adverse impact. In some cases, a higher degree of risk may be acceptable because of a greater perceived potential for reward. Management is responsible for identifying risks and controls related to our significant business activities; mapping the risks to our corporate strategy; and developing programs and recommendations to determine the sufficiency of risk identification, the balance of potential risk to potential reward and the appropriate manner in which to control and mitigate risk.

The Board implements its risk oversight responsibilities by having management provide periodic briefing and informational sessions on the significant voluntary and involuntary risks that our company faces and how our company is seeking to control and mitigate those risks. In some cases, as with risks relating to significant acquisitions, risk oversight is addressed as part of the full Board’s engagement with the CEO and management.

The Board annually reviews a management assessment of the various operational and regulatory risks facing our company, their relative magnitude and management’s plan for mitigating these risks. The Board also reviews risks related to our company’s business strategy at its annual strategic planning meeting and at other meetings as appropriate.

In certain cases, a Board committee is responsible for oversight of specific risk topics. For example, the Audit Committee oversees risk issues associated with our overall financial reporting and disclosure process and legal compliance, as well as reviewing policies and procedures on risk-control assessment and accounting risk exposure, including our companywide risk control activities. The Audit Committee meets with our executive officers and meets with our Director–Audit Services, as well as with our independent registered public accounting firm, in separate executive sessions at each of its in-person meetings during the year, at which time risk issues are discussed regularly.

In addition, our Executive Compensation Committee oversees risks related to our compensation program, as discussed in greater detail elsewhere in this proxy statement, and our Corporate Governance Committee oversees risks related to our governance practices and policies.

BOARD AND COMMITTEE MEMBERSHIP

Our business, property and affairs are managed under the direction of our Board. Members of our Board are kept informed of our business through discussions with our CEO and other officers, by reviewing materials provided to them periodically and in connection with Board and committee meetings, and by participating in meetings of the Board and its committees.

During 2017, the Board held seven regular meetings (four in-person and three telephonic meetings) and no special meetings. All of our incumbent directors who served on the Board during 2017 attended all of the meetings of the Board and Board committees on which they served.

Our corporate governance guidelines provide that members of our Board are expected to attend our Annual Meeting of Shareholders. All members of the Board attended the 2017 Annual Meeting of Shareholders.

The Board has four standing committees: the Audit Committee, the Executive Compensation Committee, the Corporate Governance Committee and the Executive Committee. The table below provides the current membership of our Board and each of our Board committees. Our Board has

determined affirmatively that each member of our Audit Committee, Executive Compensation Committee and Corporate Governance Committee is “independent” under our corporate governance guidelines, our director independence guidelines and the rules of the NYSE.

Our Board has adopted written charters for each of its Audit, Executive Compensation, Corporate Governance and Executive Committees. Copies of the charters of each of these committees are available on and may be printed from our website at http://www.onegas.com/en/About/Governance/CommitteesCharters.aspx. Copies are also available from our corporate secretary upon request. The responsibilities of our Board committees are summarized below. From time to time the Board, in its discretion, may form other committees.

DIRECTOR NOMINATIONS

Our corporate governance guidelines provide that the Board is responsible for nominating candidates for Board membership and for the delegation of the screening process to the Corporate Governance Committee of the Board. This committee, with recommendations and input from our Chairman of the Board, CEO and the directors, evaluates the qualifications of each director candidate and assesses the appropriate mix of skills, qualifications and characteristics required of Board members in the context of the perceived needs of the Board at a given point in time. The Corporate Governance Committee is responsible for recommending to the full Board candidates for nomination by the Board for election as members of our Board.

Our corporate governance guidelines provide that candidates for nomination by the Board must be committed to devote the time and effort necessary to be productive members of the Board and that, in nominating candidates, the Board will endeavor to establish director diversity in personal background, race, gender, age and nationality. The guidelines also provide that the Board will seek to maintain a mix that includes, but is not limited to, the following areas of core competency: accounting and finance; investment banking; business judgment; management; industry knowledge; crisis response; international business; leadership; strategic vision; law; and corporate relations.

The Corporate Governance Committee’s charter provides that it has the responsibility, in consultation with the Chairman of the Board and CEO, to search for, recruit, screen, interview and recommend to the Board candidates for the position of director as necessary to fill vacancies on the Board or the additional needs of the Board and to consider management and shareholder recommendations for candidates for nomination by the Board. In carrying out this responsibility, the Corporate Governance Committee evaluates the qualifications and performance of incumbent directors and determines whether to recommend them for re-election to the Board. In addition, this committee determines, as necessary, the portfolio of skills, experience, diversity, perspective and background required for the effective functioning of the Board considering our business strategy and our regulatory, geographic and market environments.

Our corporate governance guidelines contain a policy regarding the Corporate Governance Committee’s consideration of prospective director candidates recommended by shareholders for nomination by our Board. Under this policy, and in accordance with our bylaws, any shareholder who wishes to recommend a prospective candidate for nomination by our Board for election at our 2019 annual meeting should send a letter of recommendation to our corporate secretary at our principal executive offices by no later than December 5, 2018. The letter should include the name, address and number of shares owned by the recommending shareholder (including, if the recommending shareholder is not a shareholder of record, proof of ownership of the type referred to in Rule 14a-8(b)(2) of the proxy rules of the Securities and Exchange Commission), the prospective candidate’s name and address, a description of the prospective candidate’s background, qualifications and relationships, if any, with our company and all other information necessary for our Board to determine whether the prospective candidate meets the independence standards under the rules of the NYSE and our director independence guidelines. A signed statement from the prospective candidate should accompany the letter of recommendation indicating that he or she consents to being considered as a nominee of the Board and that, if nominated by the Board and elected by the shareholders, he or she will serve as a director. The Corporate Governance Committee will evaluate prospective candidates recommended by shareholders for nomination by our Board in light of the various factors set forth above.

Neither the Corporate Governance Committee, the Board, nor our company itself discriminates in any way against prospective candidates for nomination by the Board on the basis of age, sex, race, religion, or other personal characteristics. There are no differences in the manner in which the Corporate Governance Committee or the Board evaluates prospective candidates based on whether the prospective candidate is recommended by a shareholder or by the Corporate Governance Committee, provided that the recommending shareholder furnishes to our company a letter of recommendation containing the information described above along with the signed statement of the prospective candidate referred to above.

In addition to having the ability to recommend prospective candidates for nomination by our Board, under our bylaws, shareholders may themselves nominate candidates for election at an annual meeting of shareholders. Any shareholder who desires to nominate candidates for election as directors at our 2019 annual meeting must follow the procedures set forth in our bylaws. Under these procedures, notice of a shareholder nomination for the election of a director must be received by our corporate secretary at our principal executive offices not less than 120 calendar days before the first anniversary of the date that our proxy statement was released to shareholders in connection with our 2018 Annual Meeting of Shareholders (i.e., notice must be received no later than December 5, 2018). If the date of the 2019 annual meeting is more than 30 days from the first anniversary date of the 2018 meeting, our corporate secretary must receive notice of a shareholder nomination by the close of business on the tenth day following the earlier of (i) the day on which notice of the date of the meeting is mailed to shareholders or (ii) the day on which public announcement of the meeting date is made. In accordance with our bylaws, a shareholder notice must contain certain information about the candidate the shareholder desires to nominate for election as a director, including: (a) the name, age, business address and

residence address of such person; (b) the principal occupation or employment of such person; (c) the class or series and number of our shares that are owned beneficially or of record by such person and any affiliates or associates of such person; (d) the name of each nominee holder of our shares owned beneficially but not of record by such person or any affiliates or associates of such person, and the number of our shares held by each such nominee holder; (e) whether and the extent to which any derivative instrument, swap, option, warrant, short interest, hedge or profit interest or other transaction has been entered into by or on behalf of such person, or any affiliates or associates of such person, with respect to our shares; (f) whether and the extent to which any other transaction, agreement, arrangement or understanding (including any short position or any borrowing or lending of our shares) has been made by or on behalf of such person, or any affiliates or associates of such person, the effect or intent of any of the foregoing being to mitigate loss to, or to manage risk or benefit of stock price changes for, such person, or any affiliates or associates of such person, or to increase or decrease the voting power or pecuniary or economic interest of such person, or any affiliates or associates of such person, with respect to our shares; (g) such person’s written and executed representation and agreement (in the form provided by the corporate secretary upon written request) that such person (1) is not and will not become a party to any agreement, arrangement or understanding with, and has not given any commitment or assurance to, any person or entity as to how such person, if elected as a director of the company, will act or vote on any issue or question, (2) is not and will not become a party to any agreement, arrangement or understanding with any person or entity other than the company with respect to any direct or indirect compensation, reimbursement or indemnification in connection with service or action as a director of the company that has not been disclosed to the company in such representation and agreement and (3) in such person’s individual capacity, would be in compliance, if elected as a director of the company, and, if elected as a director, will comply with, all applicable publicly disclosed confidentiality, corporate governance, conflict of interest, Regulation FD, code of conduct and ethics, and stock ownership and trading policies and guidelines of the company; (h) such person’s completed written questionnaire with respect to the background and qualification of such individual and the background of any other person or entity on whose behalf, directly or indirectly, the nomination is being made (which form of questionnaire shall be promptly provided by the corporate secretary to the requesting shareholder upon written request) and (i) all other information relating to such person that would be required to be disclosed in connection with a solicitation of proxies for the election of such person as a director, or would be otherwise required to be disclosed in connection with such solicitation, in each case pursuant to Regulation 14A under the Securities Exchange Act of 1934, as amended (including without limitation such person’s written consent to being named in the proxy statement as a nominee and to serving as a director if elected).

In addition, as to the shareholder giving the notice and the beneficial owner, if any, on whose behalf the nomination is made, the notice must set forth: (a) the name and address, as they appear on the company’s books, of such shareholder, and the name and address of such beneficial owner, if any, and any other shareholders known by such shareholder to be supporting such nominee(s); (b) the class and number of our shares that are owned beneficially and of record by such person and any affiliates or associates of such person; (c) the name of each nominee holder of our shares owned beneficially but not of record by such person or any affiliates or associates of such person, and the number of such shares held by each such nominee holder; (d) whether and the extent to which any derivative instrument, swap, option, warrant, short interest, hedge or profit interest or other transaction has been entered into by or on behalf of such person, or any affiliates or associates of such person, with respect to our shares; (e) whether and the extent to which any other transaction, agreement, arrangement or understanding (including any short position or any borrowing or lending of our shares) has been made by or on behalf of such person, or any affiliates or associates of such person, the effect or intent of any of the foregoing being to mitigate loss to, or to manage risk or benefit of stock price changes for, such person, or any affiliates or associates of such person, or to increase or decrease the voting power or pecuniary or economic interest of such person, or any affiliates or associates of such person, with respect to our shares; (f) a representation that the shareholder giving notice intends to appear in person or by proxy at the annual meeting or special meeting to nominate the persons named in its notice; (g) a description of all agreements, arrangements and understandings between such person or any affiliate or associate of such person, and any other person or persons (including their names) in connection with the nomination by such shareholder; and (h) all other information that would be required to be disclosed by such person as a participant in a solicitation of proxies for the election of directors in a contested election, or would be otherwise required to be disclosed in connection with such solicitation, in each case pursuant to Regulation 14A under the Securities Exchange Act of 1934, as amended. This information must be supplemented by such shareholder and beneficial owner, if any, not later than ten (10) days after the record date for the meeting to disclose all such information as of the record date.

At the request of the company, each proposed nominee must submit to the corporate secretary such other information as the company may reasonably require, including such information as may be necessary or appropriate in determining the eligibility of such proposed nominee to serve as an independent director of the company or that could be material to a reasonable shareholder’s understanding of the independence, or lack thereof, of such nominee.

DIRECTOR COMPENSATION

The Executive Compensation Committee’s independent compensation consultant, Meridian, annually advises the Executive Compensation Committee on matters related to non-management director compensation including competitive market data for the company’s peer group. The Executive Compensation Committee reviews and discusses the director compensation information provided by Meridian and makes a recommendation to the full Board with respect to non-management director compensation. The Executive Compensation Committee’s philosophy with respect to non-management director compensation is to target at or below the market median. The components of non-management director compensation include an annual cash retainer, additional annual cash retainer for the Chairman of the Board, the chairs of the Audit, Executive Compensation and Corporate Governance Committees and an annual stock retainer. No separate per meeting fees are paid to the non-management directors.

For 2017, the Committee recommended, and the full Board approved, that compensation paid to each of our non-management directors remain the same as 2016. Compensation for each of our non-management directors for their service on our Board is paid on an annual meeting date basis. For the period of May 26, 2016, through May 24, 2017, and for the period of May 25, 2017, through May 23, 2018, compensation consisted of an annual cash retainer of $70,000 and a stock retainer valued at $90,000. The chairs of our Audit and Executive Compensation Committees received an additional annual cash retainer of $15,000, and our lead independent director, who is also chair of our Corporate Governance Committee, received an additional annual cash retainer of $25,000. Our Chairman of the Board received an additional annual cash retainer of $75,000 for his service.

Based on the market information provided by Meridian in December 2017 indicating that our non-management director compensation was significantly below market median compared to our peers, coupled with the decision of the Executive Compensation Committee to consider non-management director compensation on a three-year basis, the Executive Compensation Committee recommended and the full Board approved non-management director compensation on a three-year cycle, beginning on the day of the annual meeting of shareholders in 2018 (May 24, 2018) through the day before the annual meeting of shareholders the following year (May 22, 2019), consisting of a $15,000 increase in the annual cash retainer, a $20,000 increase in the stock retainer, a $5,000 increase in the cash retainer for the chair of the Corporate Governance Committee/lead independent director and a $10,000 increase in the cash retainer for the Chairman of the Board. Non-management director compensation will next be considered in 2020.

All directors are reimbursed for reasonable expenses incurred in connection with attendance at Board and committee meetings.

The CEO, as the sole management director, receives no compensation for his service as a director.

Our Board has established minimum share ownership guidelines for members of our Board. The guidelines provide that within five years after joining the Board, each non-management director will own shares of the company’s common stock having a value, at a minimum, of five times the annual cash retainer for service on the Board (excluding annual retainers for service as a chair of a Board committee or for service as Chairman of the Board) as established from time to time by the Board. Shares that count toward this ownership guideline include shares owned outright in the director’s name, shares held in trust for the director’s benefit or the benefit of the director’s immediate family, and phantom shares held in the director’s account under any company deferred compensation plan for non-employee directors or any similar plan or arrangement. Shares that do not count toward this ownership guideline include unexercised stock options and shares of restricted stock for which restrictions have not yet lapsed (unvested restricted stock). A non-management director will not be allowed to sell shares of the company’s common stock (using established pre-clearance procedures) unless such director’s holdings of the company’s common stock meet the established minimum ownership guideline. Because we became a stand-alone, publicly traded company on January 31, 2014, under the guidelines our directors have five years from this date to satisfy individual share ownership requirements. However, all current directors have satisfied the minimum share ownership guidelines.

The following table sets forth the compensation paid to our non-management directors in 2017:

Director Compensation for 2017

COMPENSATION COMMITTEE INTERLOCKS AND INSIDER PARTICIPATION

During 2017, Messrs. Evans, Hutchinson, Rodriguez and Yaeger and Ms. Moore served on our Executive Compensation Committee. No member of the Executive Compensation Committee was an officer or employee of the company or its subsidiary during 2017, and no member of this committee was formerly an officer of the company or its subsidiary. In addition, during 2017, none of our executive officers served as a member of a compensation committee or Board of any other entity of which any member of our Board was an executive officer.

During 2017, Ms. Moore served as the Vice Chair of the ONEOK Executive Compensation Committee, and Mr. Rodriguez served as a member of the ONEOK Executive Compensation Committee.

EXECUTIVE SESSIONS OF THE BOARD

The non-management members of our Board meet in regularly scheduled executive sessions without any members of management present. Our Chairman of the Board presides during the non-management executive sessions of the Board. During 2017, the non-management members of our Board met in executive session during each of the four regular in-person meetings of the Board held during the year. We intend to continue this practice of regularly scheduled meetings of the non-management members of our Board.

Our corporate governance guidelines provide that our lead independent director, who is the chair of our Corporate Governance Committee, presides as the chair at executive session meetings of the independent members of our Board. Our corporate governance guidelines provide that the independent members of the Board shall meet in executive session without management or non-independent directors present in connection with each regularly scheduled in-person meeting of the Board and at such other times as the independent directors deem necessary or appropriate. The independent members of the Board met four times during the year.

COMMUNICATIONS WITH DIRECTORS

Our Board believes that it is management’s role to speak for our company. Directors refer all inquiries regarding our company from institutional investors, analysts, the news media, customers or suppliers to our CEO or his designee. Our Board also believes that any communications between members of the Board and interested parties, including stakeholders, should be conducted with the knowledge of our CEO. Interested parties, including stakeholders, may contact one or more members of our Board, including non-management directors and non-management directors as a group, by writing to the director or directors in care of our corporate secretary at our principal executive offices. A communication received from an interested party or shareholder will be forwarded promptly to the director or directors to whom the communication is addressed. A copy of the communication also will be provided to our CEO. We will not, however, forward sales or marketing materials, materials that are abusive, threatening or otherwise inappropriate, or correspondence not clearly identified as interested party or shareholder correspondence.

COMPLAINT PROCEDURES

Our Board has adopted procedures for the receipt, retention and treatment of complaints regarding accounting, internal accounting controls, or auditing matters and complaints or concerns under our code of business conduct and ethics. These procedures allow for the confidential and anonymous submission by employees of concerns regarding questionable accounting or auditing matters and matters arising under our code of business conduct and ethics. The full text of these procedures, known as our whistleblower policy, is published on and may be printed from our website at www.ONEGas.com and is also available from our corporate secretary upon request.

ELECTION BY MAJORITY VOTE

In accordance with our bylaws, the Board currently has seven members, three of whose terms will expire at the 2018 annual meeting. Directors are divided into three classes and are elected for staggered terms of three years, each with a term of office of one of the three classes of directors expiring each year. After this election, the terms of Class I, II and III will expire in 2021, 2019 and 2020, respectively. Each director will hold office for the term to which he or she is elected or until his or her successor is duly elected and qualified.

If shareholders approve the Board’s proposal to amend and restate our Certificate of Incorporation to eliminate our classified board structure and provide for the annual election of directors, as more fully described under “Proposal 5—Approval of the Amended and Restated Certificate of Incorporation to Eliminate the Classified Structure of our Board, Provide for the Annual Election of Directors and Allow Shareholder Removal of Directors with or without Cause,” then the term of all directors, including those elected at this annual meeting will end at the 2019 annual meeting. Thereafter, all directors will be elected for one-year terms.

Our bylaws provide that, in the case of uncontested elections (i.e., elections where the number of nominees is the same as the number of directors to be elected), director nominees are elected by the vote of a majority of the votes cast with respect to that nominee. Abstentions and broker non-votes with respect to the election of a director do not count as votes cast. Our corporate governance guidelines provide that any uncontested nominee for director who fails to receive the requisite majority vote at an annual or special meeting held for the purpose of electing directors where the election is uncontested must, promptly following certification of the shareholder vote, tender his or her resignation to the Board. The Board (excluding the director who tendered the resignation) will evaluate any such resignation in light of the best interests of the company and our shareholders in determining whether to accept or reject the resignation, or whether other action should be taken. In reaching its decision, the Board may consider any factors it deems relevant, including the director’s qualifications, the director’s past and expected future contributions to the company, the overall composition of the Board and whether accepting the tendered resignation would cause the company to fail to comply with any applicable rule or regulation (including the NYSE listing requirements and the federal securities laws). The Board will act on the tendered resignation and publicly disclose its decision and rationale within 90 days following certification of the shareholder vote.

If no directors receive the requisite majority vote at an annual or special meeting held for the purpose of electing directors where the election is uncontested, then, pursuant to our corporate governance guidelines, the incumbent Board will, within 180 days after the certification of the shareholder vote, nominate a new slate of directors and hold a special meeting for the purpose of electing those nominees. In this circumstance, the incumbent Board will continue to serve until new directors are elected and qualified.

The persons named in the accompanying proxy card intend to vote such proxy in favor of the election of each of the nominees named below, who are all currently directors, unless the proxy provides for a vote against the director. Although the Board has no reason to believe that the nominees will be unable to serve as directors, if a nominee withdraws or otherwise becomes unavailable to serve, the persons named as proxies will vote for any substitute nominee designated by the Board, unless contrary instructions are given on the proxy. Except for these nominees, no other person has been recommended to our Board as a potential nominee or otherwise nominated for election as a director.

BOARD QUALIFICATIONS

Our corporate governance guidelines provide that our Corporate Governance Committee will evaluate the qualifications of each director candidate and assess the appropriate mix of skills and characteristics required of Board members in the context of the perceived needs of the Board at a given point in time. Each director also is expected to:

In addition, our corporate governance guidelines provide that, in nominating candidates, the Board will endeavor to establish director diversity in personal background, race, gender, age and nationality, and to maintain a mix that includes, but is not limited to, the following areas of core competency: accounting and finance; investment banking; business judgment; management; industry knowledge; crisis response; international business; leadership; strategic vision; law; and corporate relations.

Your Board believes that each member of our Board possesses the necessary integrity, skills and qualifications to serve on our Board and that their individual and collective skills and qualifications provide them with the ability to engage management and each other in a constructive and collaborative fashion and, when necessary and appropriate, challenge management in the execution of our business operations and strategy.

Certain information with respect to the three Class I nominees for election at the annual meeting, as well as each of the other directors, is set forth below, including their names, ages, a brief description of their recent business experience, including present occupations and employment, certain directorships that each person holds and the year in which each person became a director of the company. The three nominees for Class I directors currently serve as directors of the company.

John W. Gibson, Chairman of the Board, Pattye L. Moore, Chair of the Executive Compensation Committee and Douglas H. Yaeger, Vice Chair of the Executive Compensation Committee have been nominated for re-election as Class I directors for a three-year term expiring in 2021. Ms. Moore and Messrs. Gibson and Yaeger are not being proposed for election pursuant to any agreement or understanding between Ms. Moore and Messrs. Gibson and Yaeger and the company or any other person(s).

YOUR BOARD UNANIMOUSLY RECOMMENDS A VOTE FOR EACH NOMINEE.

DIRECTOR NOMINEES FOR CLASS I DIRECTORS

Set forth below is certain information with respect to each nominee for election as a director, each of whom is a current director.

CLASS II DIRECTORS (CONTINUING DIRECTORS NOT UP FOR RE-ELECTION AT THE ANNUAL MEETING)

Set forth below is certain information with respect to each Class II director, each of whom is a current director.

CLASS III DIRECTORS (CONTINUING DIRECTORS NOT UP FOR RE-ELECTION AT THE ANNUAL MEETING)

Set forth below is certain information with respect to each Class III director, each of whom is a current director.

There are no arrangements or understandings between any of our directors and any other persons pursuant to which he or she is continuing to serve as a director of the company.

There are no family relationships between or among any of our directors and executive officers.