SEC Form DEF 14A filed by Nine Energy Service Inc.

NOTICE OF 2025 ANNUAL MEETING OF STOCKHOLDERS

To Be Held on May 2, 2025

The 2025 Annual Meeting of Stockholders (the “Annual Meeting”) of Nine Energy Service, Inc. (the “Company,” “we” and “our”) will be held at 8:00 a.m., Central Time, on May 2, 2025, at 2001 Kirby Drive, Suite 200, Houston, Texas 77019, for the following purposes:

1.  To elect two Class I directors to serve until the Company’s 2028 Annual Meeting of Stockholders or until their respective successors are elected and qualified;

2.  To ratify the appointment of PricewaterhouseCoopers LLP as our independent registered public accounting firm for the fiscal year ending December 31, 2025;

3.  To approve, on an advisory basis, the compensation of our named executive officers (“say-on-pay”);

4.  To approve the Third Amendment to the Nine Energy Service, Inc. 2011 Stock Incentive Plan; and

5.  To transact such other business as may properly come before the Annual Meeting or any adjournment or postponement thereof.

The Board of Directors of the Company (the “Board”) recommends you vote (i) “FOR” the election of each of the nominees named in the accompanying proxy statement to the Board, (ii) “FOR” the ratification of the appointment of PricewaterhouseCoopers LLP as our independent registered public accounting firm for the fiscal year ending December 31, 2025, (iii) “FOR” the approval, on an advisory basis, of the compensation of our named executive officers and (iv) “FOR” the approval of the Third Amendment to the Nine Energy Service, Inc. 2011 Stock Incentive Plan.

The Board has fixed March 3, 2025 as the record date for determining stockholders entitled to receive notice of, and to vote at, the Annual Meeting or any adjournment or postponement thereof. Only stockholders of record at the close of business on that date will be entitled to notice of, and to vote at, the Annual Meeting or any adjournment or postponement thereof. The Annual Meeting will begin promptly at 8:00 a.m., Central Time. Check-in will begin at 7:45 a.m., Central Time, and you should allow ample time for the check-in procedures.

Your vote is very important. Regardless of whether you plan to attend the Annual Meeting, we hope you will vote as soon as possible in advance of the Annual Meeting by one of the methods described in the accompanying proxy statement.

By Order of the Board of Directors

Ann G. Fox

President, Chief Executive Officer and Director

Houston, Texas

March 6, 2025

TABLE OF CONTENTS

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PROXY STATEMENT

FOR

2025 ANNUAL MEETING OF STOCKHOLDERS

OF

NINE ENERGY SERVICE, INC.

To Be Held on May 2, 2025 at 8:00 a.m., Central Time

GENERAL INFORMATION

This proxy statement (this “Proxy Statement”) contains information related to the 2025 Annual Meeting of Stockholders (the “Annual Meeting”) of Nine Energy Service, Inc. (either individually or together with its subsidiaries, as the context requires, the “Company,” “Nine,” “we,” “us” and “our”).

On or about March 20, 2025, we will send you a Notice of Internet Availability of Proxy Materials, which will provide instructions on how to view our proxy materials over the Internet and, if desired, request a full set of printed materials by mail. The Securities and Exchange Commission (the “SEC”) permits companies to send such a notice instead of a full printed set of proxy materials. We believe this process expedites the delivery of proxy materials, ensures that proxy materials remain easily accessible to our stockholders, saves costs and reduces the environmental impact of the Annual Meeting.

Meeting Date and Location

The Annual Meeting will be held at 8:00 a.m., Central Time, on May 2, 2025, at our principal executive offices, located at 2001 Kirby Drive, Suite 200, Houston, Texas, 77019.

Cameras, recording devices and other electronic devices are prohibited at the meeting.

Outstanding Securities; Record Date

Only holders of record of our common stock, par value $0.01 per share, at the close of business on March 3, 2025, the record date, will be entitled to notice of, and to vote at, the Annual Meeting. On that date, we had 42,348,643 shares of common stock outstanding and entitled to vote. Each share of our common stock is entitled to one vote for each director nominee and one vote for each other item to be voted on at the Annual Meeting.

Proxy Voting

Shares that are properly voted via the Internet or by telephone or for which proxy cards are properly executed and returned will be voted at the Annual Meeting in accordance with the directions given or, in the absence of directions, will be voted in accordance with the recommendations of the Company’s Board of Directors (the “Board” or the “Board of Directors”) as follows: (i) “FOR” the election of each of the nominees named herein to the Board as a Class I director, (ii) “FOR” the ratification of the appointment of PricewaterhouseCoopers LLP as our independent registered public accounting firm for the fiscal year ending December 31, 2025, (iii) “FOR” the approval, on an advisory basis, of the compensation of our Named Executive Officers (as defined in “Executive and Director Compensation”) as described in this Proxy Statement (“say-on-pay”) and (iv) “FOR” the approval of the Third Amendment (the “Amendment”) to the Nine Energy Service, Inc. 2011 Stock Incentive Plan (as amended and restated effective February 28, 2017, as further amended effective March 5, 2021 and as further amended effective March 6, 2023, the “Stock Plan”). It is not expected that any additional matters will be brought before the Annual Meeting, but if other matters are properly presented, the persons named as proxies in the proxy card or their substitutes will vote in their discretion on such matters.

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Cautionary Note Regarding Forward-Looking Statements

This Proxy Statement contains forward-looking statements that are subject to a number of risks and uncertainties, many of which are beyond our control. All statements, other than statements of historical fact, regarding our strategy, future operations, financial position, estimated revenues and losses, projected costs, prospects, plans, and objectives of management are forward-looking statements. When used in this Proxy Statement, the words “could,” “believe,” “anticipate,” “intend,” “estimate,” “expect,” “may,” “continue,” “predict,” “potential,” “project,” and similar expressions are intended to identify forward-looking statements, although not all forward-looking statements contain such identifying words.

All forward-looking statements speak only as of the date of this Proxy Statement; we disclaim any obligation to update these statements unless required by law, and we caution you not to place undue reliance on them. Although we believe that our plans, intentions, and expectations reflected in or suggested by the forward-looking statements we make in this Proxy Statement are reasonable, we can give no assurance that these plans, intentions, or expectations will be achieved.

We disclose important known factors that could cause our actual results to differ materially from our expectations under “Risk Factors” in Item 1A of Part I in our Annual Report for the fiscal year ended December 31, 2024. These factors, some of which are beyond our control, include the following: the level of capital spending and well completions by the onshore oil and natural gas industry, which may be affected by geopolitical and economic developments in the U.S. and globally, including conflicts, instability, acts of war or terrorism in oil producing countries or regions, particularly Russia, the Middle East, South America and Africa, as well as actions by members of the Organization of the Petroleum Exporting Countries and other oil exporting nations; general economic conditions and inflation, particularly, cost inflation with labor or materials; equipment and supply chain constraints; the effects of tariffs and other trade measures on the Company’s business; the Company’s ability to attract and retain key employees, technical personnel and other skilled and qualified workers; the Company’s ability to maintain existing prices or implement price increases on our products and services; pricing pressures, reduced sales, or reduced market share as a result of intense competition in the markets for the Company’s dissolvable plug products; conditions inherent in the oilfield services industry, such as equipment defects, liabilities arising from accidents or damage involving our fleet of trucks or other equipment, explosions and uncontrollable flows of gas or well fluids, and loss of well control; the Company’s ability to implement and commercialize new technologies, services and tools; the Company’s ability to grow its completion tool business domestically and internationally; the adequacy of the Company’s capital resources and liquidity, including the ability to meet its debt obligations; the Company’s ability to manage capital expenditures; the Company’s ability to accurately predict customer demand, including that of its international customers; the loss of, or interruption or delay in operations by, one or more significant customers, including certain of the Company’s customers outside of the United States; the loss of or interruption in operations of one or more key suppliers; the incurrence of significant costs and liabilities resulting from litigation; cybersecurity risks; and changes in laws or regulations regarding issues of health, safety and protection of the environment.

Additional risks or uncertainties that are not currently known to us, that we currently deem to be immaterial, or that could apply to any company could also materially adversely affect our business, financial condition, or future results.

These cautionary statements qualify all forward-looking statements attributable to us or persons acting on our behalf.

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QUESTIONS AND ANSWERS ABOUT THE ANNUAL MEETING

What Is the Purpose of the Annual Meeting?

At the Annual Meeting, our stockholders will consider and vote upon the following matters:

We will also consider and vote upon any other business that is properly presented at the Annual Meeting (or any adjournments or postponements thereof).

How Does the Board of Directors Recommend That I Vote?

The Board unanimously recommends that our stockholders vote:

Who Is Entitled to Vote at the Annual Meeting?

Only stockholders at the close of business on March 3, 2025, the record date, are entitled to attend the Annual Meeting in person. Seating is limited, and admission to the Annual Meeting will be on a first-come, first-served basis.

Stockholders of Record. If your shares are registered directly in your name with Equiniti Trust Company, LLC, our transfer agent, you are considered, with respect to those shares, the stockholder of record. As the stockholder of record, you have the right to grant your voting proxy directly or to vote in person at the Annual Meeting. If you own common stock directly in the Company as of the record date, your name will be on a list and you will be able to gain entry to the Annual Meeting with a government-issued photo identification, such as a driver’s license, state-issued ID card or passport.

Street Name Stockholders. If your shares are held in a stock brokerage account or through a bank, broker or other nominee, you are considered the beneficial owner of shares held in “street name” (that is, shares held in the name of your broker, bank or other nominee) and your broker, bank or other nominee is considered the stockholder of record. As the beneficial owner, you have the right to direct your bank, broker or other nominee how to vote and are also invited to attend the Annual Meeting. However, since you are not the stockholder of record, you may not vote these shares in person at the Annual Meeting unless you obtained a signed legal proxy from the stockholder of record giving you the right to vote the shares.

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Entities. If you are the representative of an entity that owns common stock of the Company, you must present a government-issued photo identification, evidence that the entity has authorized you to act as its representative at the Annual Meeting and, if the entity is a street name stockholder, proof of the entity’s beneficial stock ownership as of the record date. Each entity that owns common stock of the Company may appoint only one representative to attend on its behalf.

Non-Stockholders. If you are not a stockholder of the Company and are not the representative of an entity that owns common stock of the Company, you will be entitled to admission only if you are a proxy holder attending in lieu of a stockholder of the Company. To gain entry, you must present a government-issued photo identification and either a valid proxy from a stockholder of record authorizing you to vote the stockholder’s shares or, if you are a proxy holder for a street name stockholder, a valid legal proxy from the record holder or the bank, broker or other nominee that holds shares on behalf of the street name stockholder and, if the legal proxy does not name you, proof that you are the street name stockholder’s valid proxy holder. Only one proxy holder may attend on behalf of a stockholder of the Company.

How Many Votes Can I Cast?

You are entitled to one vote for each share of our common stock you owned on the record date on each matter presented at the Annual Meeting.

How Do I Vote My Shares?

Stockholders of Record. If you are a stockholder of record, you may vote your shares or submit a proxy to have your shares voted by one of the following methods:

Street Name Stockholders. If your shares are held in “street name” (that is, in the name of your broker, bank or other nominee), you are considered the beneficial owner of shares held in “street name” (or the “street name stockholder”) and have the right to direct the stockholder of record how to vote by following one of the following methods:

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Can I Revoke My Proxy or Change My Vote?

Stockholders of Record. If you are a stockholder of record, you may revoke your proxy or change your vote at any time before your shares are voted at the Annual Meeting by delivering to the Secretary of the Company a written notice of revocation or a duly executed proxy (via the Internet or telephone or by returning a proxy card) bearing a later date or by attending the Annual Meeting and voting in person. Attending the Annual Meeting will not automatically revoke your proxy unless you vote again during the Annual Meeting or specifically request that your prior proxy be revoked.

Street Name Stockholders. If your shares are held in “street name” and you wish to change any of your previously provided voting instructions, you must follow the procedures on the voting instruction form provided to you by your broker, bank or other nominee.

Will My Shares Be Voted if I Do Not Provide My Proxy or Voting Instructions?

Stockholders of Record. If you are a stockholder of record, your shares will not be voted if you do not provide a proxy (via the Internet or telephone or by signing and returning a proxy card). Proxy cards that are signed and returned, but do not include voting instructions, will be voted by the proxy holders as recommended by the Board of Directors.

Street Name Stockholders. If your shares are held in “street name” and you do not provide voting instructions to your broker, bank or other nominee in advance of the Annual Meeting, your shares may be voted under certain circumstances. New York Stock Exchange (“NYSE”) rules provide that the organization that holds your shares may generally vote on “routine” proposals, such as the ratification of the selection of the independent registered public accounting firm. Where a proposal is not “routine,” an organization that has not received instructions from its clients does not have discretion to vote its clients’ uninstructed shares on that proposal, and the unvoted shares are referred to as “broker non-votes.” The other proposals to be considered at the Annual Meeting, including the election of directors and the approval of the Amendment to the Stock Plan, are considered non-routine matters, and therefore brokers, banks and other nominees cannot exercise discretionary authority regarding those proposals for beneficial owners who have not returned instructions to them.

What Is a Quorum?

A majority of the issued and outstanding shares of our common stock entitled to vote, present in person or represented by proxy at the Annual Meeting, constitutes a quorum for the transaction of business at the Annual Meeting. Abstentions, withheld votes and broker non-votes will be included in determining the presence of a quorum at the Annual Meeting.

What Vote Is Required to Elect Directors?

Directors are elected by a “plurality” voting standard, which means that the two nominees for director who receive the greatest number of votes cast at the Annual Meeting will be elected as directors. Cumulative voting is not permitted in the election of directors. You may vote “for” or “withhold” authority to vote for each of the nominees for the Board. Because the two nominees for director who receive the greatest number of votes cast at the Annual Meeting will be elected as directors and because “withhold” votes and broker non-votes are not considered votes cast for the foregoing purpose, “withhold” votes and broker non-votes will not affect the outcome of the voting on director elections.

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What Vote Is Required to Ratify the Appointment of PricewaterhouseCoopers LLP as the Company’s Independent Registered Public Accounting Firm for the Fiscal Year Ending December 31, 2025?

Approval of the proposal to ratify the appointment of PricewaterhouseCoopers LLP as our independent registered public accounting firm for the fiscal year ending December 31, 2025 requires the affirmative vote of the holders of the majority of the shares of common stock present in person or represented by proxy at the Annual Meeting and entitled to vote on the matter. You may vote “for” or “against” this proposal, or you may abstain from voting on this proposal. Abstentions will be counted as present in person or represented by proxy and entitled to vote and, thus, will have the same effect as votes against this proposal. We believe this proposal is a “routine” matter, and as a result, we do not expect there to be any broker non-votes for this proposal.

What Vote Is Required to Approve, on an Advisory Basis, the Compensation of Our Named Executive Officers?

Approval, on an advisory basis, of the compensation of our Named Executive Officers as described in this Proxy Statement requires the affirmative vote of the holders of the majority of the shares of common stock present in person or represented by proxy at the Annual Meeting and entitled to vote on the matter. You may vote “for” or “against” this proposal, or you may abstain from voting on this proposal. Abstentions will be counted as present in person or represented by proxy and entitled to vote and, thus, will have the same effect as votes against this proposal. Broker non-votes will not affect the outcome of the vote on this proposal. Although this advisory vote to approve the compensation of our Named Executive Officers is non-binding, the Nominating, Governance and Compensation Committee of the Board (the “Nominating, Governance and Compensation Committee”) will review and consider the voting results when making future decisions regarding our executive compensation program.

What Vote Is Required to Approve the Amendment to the Stock Plan?

Approval of the Amendment to the Stock Plan requires the affirmative vote of the majority of the votes cast by the stockholders present in person or represented by proxy at the Annual Meeting and entitled to vote thereon. You may vote “for” or “against” this proposal, or you may abstain from voting on this proposal. Abstentions and broker non-votes are not considered votes cast for the foregoing purpose and will have no effect on the vote for this proposal.

Whom Should I Contact with Questions about the Proxy Materials or the Annual Meeting?

If you have any questions about the proxy materials or the Annual Meeting, please contact Nine Energy Service, Inc. at 2001 Kirby Drive, Suite 200, Houston, Texas 77019, Attn: Secretary or by email at [email protected].

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DIRECTORS AND EXECUTIVE OFFICERS

Board Structure and Composition

Pursuant to the Company’s Corporate Governance Guidelines, the Nominating, Governance and Compensation Committee is responsible for periodically reviewing the advisability or need for any changes in the number and composition of the Board. In the first quarter of 2025, after careful consideration of, among other things, the Company’s strategic priorities, the Nominating, Governance and Compensation Committee recommended the Board be reduced from eight to six members. In addition, the Nominating, Governance and Compensation Committee and the Board unanimously determined that new directors and perspectives would be beneficial to the Company.

Consistent therewith, on February 28, 2025, Ernie L. Danner, Curtis F. Harrell and Andrew L. Waite resigned as directors, effective as of the end of such date, and the Board appointed Julie A. Peffer and Richard A. Burnett as directors to fill two of those vacancies, with Ms. Peffer’s service to begin on March 1, 2025 and Mr. Burnett’s service to begin on May 3, 2025. Also on February 28, 2025, the Board elected Scott E. Schwinger as Chairman of the Board, effective March 1, 2025, to replace Mr. Danner. In addition to such changes in the Board’s composition, it is currently expected that Gary L. Thomas will resign from the Board on May 2, 2025, Mark E. Baldwin will resign from the Board on August 1, 2025 and a new director will be appointed to the Board later this year.

Pursuant to the Company’s certificate of incorporation, the Board of Directors is divided into three classes of directors, with each class as nearly equal in number as possible, serving staggered three-year terms, such that only one class of directors are elected in each year. To maintain balanced classes, Ms. Peffer has been assigned to Class I, and Mr. Burnett has been assigned to Class II (effective upon him joining the Board on May 3, 2025).

As of the date of this Proxy Statement, the members of the Board are as follows: (i) Darryl K. Willis and Ms. Peffer as Class I directors; (ii) Messrs. Schwinger and Thomas as Class II directors and (iii) Ann G. Fox and Mr. Baldwin as Class III directors.

As of May 3, 2025, assuming our stockholders elect the nominees of the Board as set forth in “Proposal 1—Election of Directors” below, the members of the Board will be as listed below.

⁽¹⁾  Ages as of March 6, 2025.

⁽²⁾  Member of the Nominating, Governance and Compensation Committee.

⁽³⁾  Member of the Audit Committee.

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Board Background

The below table lists certain attributes about the backgrounds of the members of the Board, as of May 3, 2025, assuming our stockholders elect the nominees of the Board as set forth in “Proposal 1—Election of Directors” below.

Years on the Board			9				8				12				<1				<1			6
Age			48				60				71				51				58			55
Gender			F				M				M				M				F			M
Racially/Ethnically Diverse																						✓

Director Resigning After the Annual Meeting

Executive Officers

Certain information about our executive officers, including their ages as of March 6, 2025, is set forth below.

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Ann G. Fox’s biographical information is set forth under “—Board Composition and Structure” above.

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CORPORATE GOVERNANCE

Board Leadership

The Board is responsible for oversight of the Company and management. The Chairman of the Board is selected by the Board and the current Chairman is Scott E. Schwinger, who is a non-employee director. Mr. Schwinger presides at all meetings of the Board, including executive sessions of the non-employee directors, subject to extraordinary circumstances. The current Chairman of the Board is not an employee of the Company.

The Board has the flexibility to determine whether the roles of Chairman of the Board and Chief Executive Officer should be combined or separate. The offices of Chairman of the Board and Chief Executive Officer are currently separated, meaning the positions of the Chairman of the Board and the Chief Executive Officer are not held by the same person. The Board views this separation as a means to allow the Board to fulfill its role in risk oversight through a collaborative, yet independent, interaction with Company management.

Director Independence

As a public company, we are required to comply with the rules of the NYSE and are subject to the rules and regulations of the SEC, including the Sarbanes-Oxley Act of 2002. The NYSE rules require listed companies to have a board of directors with at least a majority of independent directors. Additionally, each of the Audit Committee of the Board (the “Audit Committee”) and Nominating, Governance and Compensation Committee are required to be comprised solely of independent directors, as that term is defined by the applicable rules and regulations of the SEC and the NYSE. Rather than adopting its own categorical standards, each year the Board assesses director independence on a case-by-case basis, in each case consistent with the applicable rules and regulations of the SEC and the NYSE.

After reviewing all relationships each director may have directly and indirectly with the Company and its management, the Board has affirmatively determined that each of Messrs. Baldwin, Burnett, Schwinger, Thomas and Willis and Ms. Peffer has no material relationships with the Company and, therefore, is “independent” as defined under the applicable NYSE rules and guidance. In addition, the Board previously determined that Messrs. Danner, Harrell and Waite, each of whom served on the Board through February 28, 2025, had no material relationship with the Company and was “independent” as defined under the applicable NYSE rules and guidance. Ms. Fox, our President and Chief Executive Officer, is not considered to be “independent” because of her employment position with the Company.

In addition, each of Messrs. Baldwin, Burnett, Thomas and Willis and Ms. Peffer have been affirmatively determined by the Board to be independent under SEC rules and NYSE listing standards for the purposes of Audit Committee service, and the Board previously affirmatively determined that Mr. Harrell was independent under SEC rules and NYSE listing standards for the purposes of Audit Committee service. Moreover, each of Messrs. Schwinger, Thomas and Willis have been affirmatively determined by the Board to be independent under SEC rules and NYSE listing standards for the purposes of Nominating, Governance and Compensation Committee service, and the Board previously affirmatively determined that Mr. Harrell was independent under SEC rules and NYSE listing standards for the purposes of Nominating, Governance and Compensation Committee service.

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

Risk Oversight

The Board believes that risk management is an integral part of setting and implementing our business strategy, which includes, among other things, identifying and assessing the risks and opportunities facing the Company. It is management’s responsibility to manage the Company’s risk exposure and potential impact of the many risks that are associated with our business and a primary function of the Board is to assist and oversee management in this effort. The Board, as a whole and also at the committee level, has oversight responsibility.

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The Board’s committees assist the Board in fulfilling its oversight responsibilities with respect to risks within its areas of responsibilities, as further discussed below. We believe the Board’s role in risk oversight is consistent with the Company’s leadership structure (as discussed under the heading “—Board Leadership”), with the CEO and other members of senior management having direct responsibility for risk management, and the remaining directors involved in providing oversight of management’s efforts to reduce, mitigate or eliminate the risks that we face.

The primary means by which the Board and its designated committees oversees our risk management structure and policies is through its regular communications with management and our internal audit department. In connection with the quarterly Board meetings, the full Board (or the appropriate Committee in the case of risks that are under the purview of a particular Committee) receives regular reports from members of senior management on areas of material risk to the Company, including operational, financial, legal and regulatory, cybersecurity, and strategic risks. The Chair of each of the Committees will discuss and review significant matters with management outside of the quarterly Board meetings as needed. When a Committee receives a separate report or the Chairman has separate discussions, the Committee Chairman may discuss that report with the full Board.

As part of its charter, the Audit Committee is responsible for reviewing and discussing our policies with respect to risk assessment and risk management generally, and also specifically with respect to financial reporting, internal controls and accounting matters, legal, tax and regulatory compliance and the internal audit function. The Audit Committee is responsible for ensuring that an effective risk assessment process is in place, and quarterly reports are made to the Audit Committee on material risks facing the Company. Upon request, both the full Board and Audit Committee may receive reports from those executive officers who are deemed responsible for particular risks due to being in a position that makes them most likely to be able to impact the effects of such risks. The Audit Committee also oversees our internal audit department, which is responsible for monitoring the Company’s adherence to our significant corporate policies and internal controls. In addition, the Board has assigned oversight of cybersecurity risk management to the Audit Committee. Please refer to Item 1C. Cybersecurity in Part I of the Company’s Annual Report on Form 10-K for the fiscal year ended December 31, 2024 for additional information regarding the Board’s and the Audit Committee’s roles in cybersecurity risk oversight.

The Nominating, Governance and Compensation Committee assists the Board in fulfilling its oversight responsibilities with respect to the management of risks arising from our compensation and benefits policies and programs. The Nominating, Governance and Compensation Committee also assists the Board in fulfilling its oversight responsibilities with respect to the management of risks associated with corporate governance, Board organization, membership and structure and succession planning for our Chief Executive Officer and other members of senior management.

Oversight of Strategy

Oversight of the Company’s business strategy and strategic planning is a key responsibility of the Board. The Board believes that overseeing and monitoring strategy is a continuous process and takes a multilayered approach in exercising its duties. The Board is committed to oversight of the Company’s business strategy and strategic planning, including work embedded in the Board committees, regular Board meetings and a dedicated meeting each year to focus on strategy. This ongoing effort enables the Board to focus on Company performance over the short, intermediate and long term, as well as the quality of operations. In addition to financial and operational performance, non-financial measures, including sustainability goals, are discussed regularly by the Board and Board committees.

While the Board and its committees oversee strategic planning, Company management is charged with executing the business strategy. To monitor performance against the Company’s strategic goals, the Board receives regular updates and actively engages in dialogue with our Company’s senior leaders. The Board’s oversight and management’s execution of business strategy are viewed with a long-term mindset and a focus on assessing both opportunities for and potential risks to the Company.

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ESG Strategy

In 2024, the Company achieved several key milestones that reinforce its commitment to long-term sustainability, including the following:

In 2025, the Board is focused on building on its 2024 successes related to the key priorities that will drive further reductions in emissions and optimize resource use and enhance its ESG data management systems.

Board Meetings

The Board meets regularly during the year and holds special meetings and acts by unanimous written consent whenever circumstances require. During 2024, there were seven meetings of the Board. All incumbent directors attended at least 75% of such aggregate meetings of the Board and any committees on which they served occurring during 2024. Directors are encouraged to attend the Company’s annual meetings of stockholders, and each director then-serving attended the Company’s 2024 Annual Meeting of Stockholders.

Board Committees

The Board has established two standing committees: the Audit Committee and the Nominating, Governance and Compensation Committee, each of which is comprised entirely of directors who meet the applicable independence requirements of the NYSE rules and SEC rules applicable to such committee membership. These Committees keep the Board informed of their actions and provide assistance to the Board in fulfilling its oversight responsibility to stockholders. The table below provides current Committee membership information as well as meeting information for the last fiscal year. Mr. Harrell, who resigned from the Board on February 28, 2025, served on the Audit Committee and the Nominating, Governance and Compensation Committee during the last fiscal year and in 2025 until his resignation from the Board.

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The functions performed by, and the duties of, the Audit Committee and the Nominating, Governance and Compensation Committee, which are set forth in more detail in their charters, are summarized below. The charters of these Committee are posted on the Company’s website at www.nineenergyservice.com under the heading “Investors” and the subheading “Corporate Governance.”

Audit Committee

The Audit Committee, which is a separately-designated standing committee established in accordance with Section 3(a)(58)(A) of the Securities Exchange Act of 1934, as amended (the “Exchange Act”), currently consists of Messrs. Baldwin (Chair), Thomas and Willis, each of whom the Board has affirmatively determined meets the independence standards under the SEC rules and the NYSE listing standards applicable to members of audit committees. Mr. Burnett and Ms. Peffer have been appointed to the Audit Committee, effective as of May 3, 2025 and March 7, 2025, respectively. The Board has affirmatively determined that Ms. Peffer and Mr. Burnett meet the independence standards under the SEC rules and the NYSE listing standards applicable to members of audit committees. Mr. Harrell, who resigned from the Board on February 28, 2025, served on the Audit Committee during the last fiscal year and in 2025 until his resignation from the Board, and the Board had previously affirmatively determined that he meets the independence standards under the SEC rules and the NYSE listing standards applicable to members of audit committees. The Board has also determined (or previously determined, in the case of Mr. Harrell) that Messrs. Baldwin, Burnett, Harrell, Thomas and Willis and Ms. Peffer are each financially literate, as required by the NYSE listing standards, and satisfy the definition of “audit committee financial expert,” as set forth in Item 407(d) of Regulation S-K promulgated under the Securities Act of 1933, as amended (the “Securities Act”).

Mr. Baldwin currently serves as the Chair of the Audit Committee. Upon Mr. Baldwin’s expected resignation from the Board on August 1, 2025, Mr. Burnett is expected to become the Chair of the Audit Committee.

The Audit Committee oversees, reviews, acts on and reports on various auditing and accounting matters to the Board, including: the selection of our independent accountants, the scope of our annual audits, fees to be paid to the independent accountants, the performance of our independent accountants and our accounting practices. In addition, the Audit Committee oversees our compliance programs relating to legal and regulatory requirements.

Under the Audit Committee’s charter, the primary function of the Audit Committee is to assist the Board in fulfilling its oversight responsibilities as to, among other duties: (1) the quality, integrity and reliability of the Company’s financial statements; (2) the Company’s compliance with legal, tax and regulatory requirements; (3) the Company’s compliance with the Company’s Corporate Code of Business Conduct and Ethics and Financial Code of Ethics; (4) qualifications, independence and performance of the independent registered public accounting firm engaged for the purpose of preparing or issuing an audit report on the Company’s financial statements; (5) effectiveness and performance of the Company’s internal audit function; and (6) effectiveness and performance of the Company’s system of internal controls regarding finance, accounting, legal compliance and ethics.

Nominating, Governance and Compensation Committee

The Nominating, Governance and Compensation Committee currently consists of Messrs. Schwinger, Thomas and Willis (Chair), each of whom the Board has affirmatively determined is independent under SEC

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rules and NYSE listing standards. Mr. Harrell, who resigned from the Board on February 28, 2025, served on the Nominating, Governance and Compensation Committee during the last fiscal year and in 2025 until his resignation from the Board, and the Board had previously affirmatively determined that he is independent under SEC rules and NYSE listing standards.

This Committee identifies, evaluates and recommends qualified nominees to serve on the Board; develops and oversees our internal corporate governance processes; and maintains a management succession plan. This Committee also oversees the process by which salaries, incentives and other forms of compensation for officers and other employees are established and administers our incentive compensation plan.

The Nominating, Governance and Compensation Committee has the authority to engage a compensation consultant at any time if it determines that it would be appropriate to consider the recommendations of an independent outside source. During 2024, the Nominating, Governance and Compensation Committee chose to engage Compensation Advisory Partners, an independent compensation consultant, who reviewed both our executive compensation program and our non-executive director compensation program for 2024 and produced year-end compensation reports for the Nominating, Governance and Compensation Committee in the second quarter of 2024. These reports were utilized by the Nominating, Governance and Compensation Committee when making certain salary, incentive and year-end compensation decisions for the executives and the non-executive directors for 2024.

The Nominating, Governance and Compensation Committee has the authority to delegate to its Chair, any one of its members, or any subcommittee it may form, the responsibility and authority for any particular matter, as it deems appropriate from time to time under the circumstances. No executive officer except the Chief Executive Officer has input into the Nominating, Governance and Compensation Committee’s decisions regarding specific compensation awarded to members of executive management.

Director Nominations

The Nominating, Governance and Compensation Committee considers candidates for director who are recommended by its members, by other Board members, by stockholders, and by management. To assist it in identifying director candidates, the Nominating, Governance and Compensation Committee is also authorized to retain, at the expense of the Company, third party search firms and legal, accounting, or other advisors, including for purposes of performing background reviews of potential candidates.

Director Tenure and Composition

The Board does not have a mandatory retirement age or term limits for directors. We believe our stockholders benefit from continuity of directors. To ensure the Board continues to generate new ideas and operate effectively, the Nominating, Governance and Compensation Committee discusses individual Board member performance and takes steps as necessary regarding continuing director tenure. The Nominating, Governance and Compensation Committee considers each director’s age and length of tenure when considering Board composition and seeks to maintain a balance of experience and continuity, along with fresh perspectives.

Among the qualifications and skills of a candidate considered important by the Nominating, Governance and Compensation Committee are:

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Communications with the Board

The Board welcomes communications from our stockholders and other interested parties. Stockholders and any other interested parties may send communications to the Board, any committee of the Board, the Chairman of the Board or to any director in particular, by writing to:

Nine Energy Service, Inc.

2001 Kirby Drive, Suite 200

Houston, Texas 77019

Attn: General Counsel

Stockholders and any other interested parties should mark the envelope containing each communication as “Stockholder Communication with Directors” and clearly identify the intended recipient(s) of the communication.

Our General Counsel will review each communication received from stockholders and other interested parties and will forward the communications, as expeditiously as reasonably practicable, to the addressees if: (1) the communication complies with the requirements of any applicable policy adopted by the Board relating to the subject matter of the communication and (2) the communication falls within the scope of matters generally considered by the Board.

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EXECUTIVE AND DIRECTOR COMPENSATION

The tables and narrative disclosure below provide compensation disclosure that satisfies the requirements applicable to smaller reporting companies, as defined in Regulation S-K promulgated under the Securities Act. As a smaller reporting company, we are required to provide a Summary Compensation Table, an Outstanding Equity Awards at Fiscal Year End Table, a Director Compensation Table and limited narrative disclosures.

Overview

In this section, we provide disclosure relating to the compensation of our Named Executive Officers during 2024. The tables and narrative disclosure below provide compensation information for the following executive officers (collectively, our “Named Executive Officers”):

The compensation of our Named Executive Officers consists of a base salary, annual cash bonus opportunities, long-term incentive compensation in the form of equity awards and other benefits, as described below. Our Named Executive Officers are also eligible to receive certain payments and benefits upon a termination of employment under certain circumstances in accordance with the terms of their employment agreements.

Role of Compensation Consultants in 2024 Compensation Decisions

The Nominating, Governance and Compensation Committee, in overseeing the compensation of our non-employee directors and our executive compensation program, employs several analytic tools and considers information from multiple resources. Subject to Board approval in certain circumstances, the Nominating, Governance and Compensation Committee has the sole authority to make final decisions with respect to our executive compensation program, and the Nominating, Governance and Compensation Committee is not obligated to utilize the input of other parties.

The Nominating, Governance and Compensation Committee has the authority to engage a compensation consultant at any time if the Nominating, Governance and Compensation Committee determines that it would be appropriate to consider the recommendations of an independent, outside source. During 2024, the Nominating, Governance and Compensation Committee continued its engagement of Compensation Advisory Partners (“CAP”), an independent compensation consultant. CAP reviewed both our executive compensation program and our non-executive director compensation program for 2024 and produced compensation reports for the Nominating, Governance and Compensation Committee over the course of 2024. These reports were utilized by the Nominating, Governance and Compensation Committee when making certain compensation decisions for the executives and the non-executive directors for 2024.

CAP also provided the Nominating, Governance and Compensation Committee with recommendations and advice during the process of selecting an appropriate peer group for 2024 compensation purposes. The Nominating, Governance and Compensation Committee informed CAP that its general criteria for selecting a peer group consisted of:

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In May 2024, the Nominating, Governance and Compensation Committee and CAP determined that an appropriate peer group should consist of the following 13 peer companies that are most statistically related to us with a similar revenue size:

The above peer group is used by the Nominating, Governance and Compensation Committee for purposes of making decisions regarding base salaries, bonus targets and metrics and long-term incentive award benchmarking.

Stock Ownership Guidelines

We maintain stock ownership guidelines applicable to our senior executives, including our Named Executive Officers, and all non-employee directors of the Company. The stock ownership guidelines are intended to encourage significant ownership of the Company’s common stock by the individuals covered by the policy and to align the personal interests of such covered persons with the interests of our stockholders.

Our stock ownership guidelines, as originally adopted on March 6, 2019, required that our senior executives and non-employee directors own a minimum number of shares of the Company’s common stock, based on a multiple of his or her base salary or cash retainer alone. On January 12, 2024, after a review of the guidelines with CAP to ensure competitiveness, particularly in light of the extreme volatility in the Company’s common stock price, the Board amended our stock ownership guidelines to include fixed share alternatives, as set forth in the table below and with the fixed number of shares generally determined by multiplying the person’s base salary

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or cash retainer by the applicable multiple and dividing by the last reported sale price of the Company’s common stock on the NYSE on March 6, 2019 (the date on which the guidelines were originally adopted).

Compliance with our stock ownership guidelines is reviewed annually. Taking into account the applicable time to meet the above ownership requirements, the minimum number of qualifying shares of our common stock held by each covered person will generally be calculated on the first trading day of the applicable calendar year based on the closing price of our common stock on the preceding trading day.

Clawback Policy

We have adopted a clawback policy effective as of November 3, 2023 that complies with the NYSE’s new clawback rules promulgated under Section 10D of the Exchange Act and the rules promulgated thereunder. In the event the Company is required to prepare an accounting restatement of its financial statements due to the Company’s material noncompliance with any such financial reporting requirement, the clawback policy requires that covered executives must reimburse the Company, or forfeit, any excess incentive-based compensation received by such covered executive during the three completed fiscal years immediately preceding the date on which the Company is required to prepare the restatement. Executives covered by the clawback policy are current and former executive officers, as determined by the Nominating, Governance and Compensation Committee in accordance with Section 10D of the Exchange Act and the NYSE listing standards. Incentive-based compensation subject to the clawback policy includes any cash or equity compensation that is granted, earned or vested based wholly or in part on the attainment of a financial reporting measure. The amount subject to recovery is the excess of the incentive-based compensation received based on the erroneous data over the incentive-based compensation that would have been received had it been based on the restated results. The clawback policy will only apply to incentive-based compensation received on or after October 2, 2023.

Equity Award Grant Practices

The Company does not currently grant new awards of stock options, stock appreciation rights or similar option-like instruments. Accordingly, the Company does not have a specific policy or practice on the timing of such awards in relation to the disclosure of material nonpublic information by the Company. In the event the Company determines to grant such awards in the future, the Board and the Nominating, Governance and Compensation Committee will evaluate the appropriate steps to take in relation to the foregoing.

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Summary Compensation Table

The following table summarizes the compensation paid to our Named Executive Officers for the fiscal years ended December 31, 2024 and 2023.

Narrative Disclosure to Summary Compensation Table

Base Salary

Ms. Fox’s and Messrs. Crombie’s, Sirkes’ and Moore’s annualized base salaries for 2024 were $700,000, $510,000, $440,000 and $410,000, respectively, at the beginning of 2024, and then each NEO’s base salary increased by 5% effective March 10, 2024. Following such increase, Ms. Fox’s and Messrs. Crombie’s, Sirkes’ and Moore’s annualized base salaries were $735,000, $535,000, $462,000 and $430,500, respectively. Please see “Narrative Disclosure to Summary Compensation Table—Employment Agreements” below for more information regarding our Named Executive Officers’ Employment Agreements. Also, please see the section entitled “Additional Narrative Disclosure—Potential Payments upon Termination or Change In Control” below for more details regarding the severance benefits provided to our Named Executive Officers under the Employment Agreements.

Quarterly Cash Incentive Bonus Program

We maintain a quarterly cash incentive bonus program, pursuant to which our Named Executive Officers are eligible to receive performance-based bonuses based on achievement with respect to certain financial performance targets and potential cash bonuses determined by the Nominating, Governance and Compensation Committee.

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Performance goals and related targets for the first, second, third and fourth quarters of 2024, each based on Adjusted EBITDA targets by service line and certain safety metrics, were established on January 12, 2024, April 25, 2024, August 1, 2024, and October 30, 2024, respectively. On April 25, 2024, it was determined that the relevant performance goals for the first quarter of 2024 were achieved at varying levels by service line. On August 1, 2024, it was determined that the relevant performance goals for the second quarter of 2024 were achieved at varying levels by service line. On October 22, 2024, it was determined that the relevant performance goals for the third quarter of 2024 were achieved at varying levels by service line. On February 4, 2025, it was determined that the relevant performance goals for the fourth quarter of 2024 were achieved at varying levels for our Named Executive Officers.

As a result, the Nominating, Governance and Compensation Committee approved the payment of three quarterly bonuses for 2024, under the quarterly cash incentive bonus program for each of the Company’s executive officers and certain other employees. The aggregate quarterly bonus payments to our Named Executive Officers consisted of the following amounts for 2024:

Employment Agreements

All of our Named Executive Officers have entered into employment agreements with the Company and the Employer. Ms. Fox entered into an amended and restated employment agreement on August 28, 2018, and Messrs. Crombie and Moore entered into amended and restated employment agreements on November 20, 2018. Mr. Sirkes entered into an employment agreement on March 31, 2020 in connection with his promotion to our Senior Vice President and Chief Financial Officer. We refer to the employment agreements herein collectively as the “Employment Agreements.”

The Employment Agreements provide for a three-year initial term with automatic renewals for additional one-year periods unless either the applicable Named Executive Officer or the Employer gives written notice of non-renewal at least 60 days prior to the expiration of the then-current initial term or renewal term.

The Employment Agreements provide for initial annualized base salaries and initial annual bonus opportunities under the Company’s cash incentive bonus program based on the achievement of certain performance targets established by the Board or the Nominating, Governance and Compensation Committee. Please see “Narrative Disclosure to Summary Compensation Table—Base Salary” and “Narrative Disclosure to Summary Compensation Table—Quarterly Cash Incentive Bonus Program” above for a discussion of our Named Executive Officers’ base salaries and the Company’s cash incentive bonus program, respectively. In addition, pursuant to the Employment Agreements, our Named Executive Officers are eligible to receive annual equity compensation awards pursuant to the Stock Plan on such terms and conditions as determined by the Board or a committee thereof. While employed under the Employment Agreements, the executives are eligible for certain additional benefits, including reimbursement of reasonable business expenses, paid vacation, and participation in the Company’s benefit plans or programs.

The Employment Agreements provide for certain severance benefits upon a resignation by the applicable executive for “good reason” or upon a termination by the Employer without “cause.” Please see the section entitled “Additional Narrative Disclosure—Potential Payments upon Termination or Change in Control” below for more details regarding the severance benefits provided to our Named Executive Officers under the Employment Agreements.

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The Employment Agreements also contain certain restrictive covenants, including provisions that create restrictions, with certain limitations, on our Named Executive Officers competing with the Company and its affiliates, soliciting any customers, or soliciting or hiring Company employees or inducing them to terminate their employment. These restrictions are generally intended to apply during the term of our Named Executive Officers’ employment with the Company and for the one-year period following termination of employment.

The Stock Plan

The Stock Plan is a long-term incentive plan pursuant to which awards, including stock options, stock appreciation rights, restricted stock, performance awards, restricted stock units, bonus stock, dividend equivalents, other stock-based awards and cash awards, may be granted to certain employees and other service providers of the Company and its subsidiaries. We provide grants of equity-based awards and long-term cash-based awards to our employees (including our Named Executive Officers) and our non-employee directors pursuant to our Stock Plan in order to align their interests with those of our stockholders.

2022 Performance Cash Awards

On May 3, 2022, our Named Executive Officers, were granted performance-based cash awards, which vest upon the Nominating, Governance and Compensation Committee’s certification of the level of achievement of certain performance goals, based on relative total shareholder return, subject to the continued service of our Named Executive Officers through the date of such certification. The awards are divided into three equal tranches, each of which is eligible to vest over a one-year performance period such that the award would be fully vested after three years if all of the performance metrics are satisfied. Payout of the award ranges from 0% to 200% of the target value. No amounts were earned with respect to the second tranche of the performance-based cash awards for the performance period beginning on May 1, 2023 and ending on April 30, 2024. The grant date target value of the full award, payout percentage and payment in respect of the 2022 Tranche II Performance Cash Award for each Named Executive Officer is as follows:

2023 Performance Cash Awards

On May 9, 2023, our Named Executive Officers were granted performance-based cash awards, which vest upon the Nominating, Governance and Compensation Committee’s certification of the level of achievement of certain performance goals, based on relative total shareholder return, subject to the continued service of our Named Executive Officers through the date of such certification. The awards are divided into three equal tranches, each of which is eligible to vest over a one-year performance period such that the award would be fully vested after three years if all of the performance metrics are satisfied. Payout of the award ranges from 0% to 200% of the target value. No amounts were earned with respect to the first tranche of the performance-based cash awards for the performance period beginning on May 1, 2023 and ending on April 30, 2024. The grant date target value of the performance-based cash awards for each Named Executive Officer is as follows:

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2024 Restricted Stock Awards

In addition, on May 7, 2024, our Named Executive Officers were granted time-based restricted stock awards, which vest in three substantially equal installments on each of the first three anniversaries of the grant date, subject to the continued service of the Named Executive Officer through each applicable vesting date.

2024 Time-Based Cash Awards

On May 7, 2024, our Named Executive Officers were granted time-based cash awards, which vest in two equal installments on each of the six-month anniversary of the grant date and the 12-month anniversary of the grant date, subject to the continued service of the Named Executive Officer through each applicable vesting date.

Other Compensation Elements

We offer participation in broad-based retirement, health and welfare plans to all of our employees. We currently maintain a retirement plan intended to provide benefits under Section 401(k) of the Code. Under the 401(k) plan, eligible employees, including our Named Executive Officers, are allowed to contribute portions of their base compensation to a tax-qualified retirement account. See “Additional Narrative Disclosure—Retirement Benefits” for more information. In addition, minimal perquisites have historically been provided to our Named Executive Officers, including, for Mr. Crombie, reimbursement for the lease of a vehicle.

Outstanding Equity Awards at 2024 Fiscal Year-End

The following table reflects information regarding outstanding equity and equity-based awards held by our Named Executive Officers as of December 31, 2024.

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Additional Narrative Disclosure

Retirement Benefits

We have not maintained, and do not currently maintain, a defined benefit pension plan or nonqualified deferred compensation plan. We currently maintain a retirement plan intended to provide benefits under Section 401(k) of the Code where employees, including our Named Executive Officers, are allowed to contribute portions of their base compensation to a tax-qualified retirement account. Beginning January 1, 2024, the Company began providing matching contributions equal to 100% of elective deferrals up to 3% of eligible compensation and 50% of elective deferrals from 3% to a maximum of 5% of eligible compensation, subject to the applicable contribution limits. Matching contributions are immediately fully vested. However, no matching contributions are being paid during 2025 per an amendment to the retirement plan.

Potential Payments upon Termination or Change in Control

The Employment Agreements provide for potential severance benefits in connection with certain terminations of employment. The Employment Agreements provide that, in the event a Named Executive Officer’s employment terminates by reason of his or her death or “disability” (as defined in “Additional Narrative Disclosure—Applicable Definitions” below), then, provided that the applicable executive (or, if applicable, his or her estate) timely executes and does not revoke a release in a form acceptable to the Employer and abides by the restrictive covenants included in his or her Employment Agreement, a prorated portion of the applicable executive’s outstanding equity-based awards will become immediately vested on the date of such termination (determined based on target performance for awards then subject to a performance condition). Outstanding stock options that have become vested as of the date of such termination (determined after giving effect to the foregoing sentence) will remain exercisable through the earlier of one year after the date of such termination or the original expiration date of such stock options.

The Employment Agreements also provide that, if a Named Executive Officer’s employment is terminated (i) by the Employer without “cause,” including upon the expiration of the then-existing initial term or renewal term, as applicable, as a result of the Employer’s non-renewal of the term of his or her Employment Agreement, or (ii) by the applicable executive for “good reason” (each, a “Qualifying Termination”), then, provided that the applicable executive timely executes and does not revoke a release in a form acceptable to the Employer and abides by the restrictive covenants included in his or her Employment Agreement, the applicable executive will be eligible to receive:

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In the event a Named Executive Officer experiences a Qualifying Termination or his or her employment terminates by reason of his or her death or disability, in each case, within the 24-month period immediately following a “corporate change” (as defined in the Stock Plan), then the applicable executive will be eligible to receive the payments and benefits described above, except that: (i) the applicable executive’s Severance Multiple will be increased from two to three in the case of Ms. Fox, from one and one-half to two and one-half in the case of Mr. Crombie and from one to two in the case of Messrs. Sirkes and Moore; and (ii) all outstanding equity awards held by the applicable executive on the date of such Qualifying Termination will become immediately fully vested (determined based on target performance for awards then subject to performance requirements). Outstanding stock options that have become vested as of the date of such termination (determined after giving effect to the foregoing sentence) will remain exercisable through the earlier of one year after the date of such termination or the original expiration date of such stock options.

Applicable Definitions

The Employment Agreements provide that “cause” generally means that the applicable executive has: (i) engaged in gross negligence or willful misconduct in the performance of his or her duties; (ii) willfully breached any material provision of his or her Employment Agreement, any other written agreement between the Company and the applicable executive or any of the Company’s corporate policies or codes of conduct; (iii) willfully engaged in conduct that is injurious to the Company; or (iv) committed or been convicted of, pleaded no contest to or received deferred adjudication with respect to a felony or any crime or misdemeanor involving fraud, dishonesty or moral turpitude that results in material harm to the Company. In addition, the Employment Agreements provide that certain notice and cure provisions must be satisfied in order for a termination of employment for cause to be effective.

The Employment Agreements provide that “good reason” generally means: (i) a material diminution in the applicable executive’s base salary, other than as part of a decrease of up to 10% of the base salaries of all executive officers; (ii) the involuntary relocation of the applicable executive’s principal place of employment by more than 75 miles from his or her principal place of employment as of the effective date of his or her Employment Agreement; (iii) a material diminution in the applicable executive’s authority, duties or responsibilities, including a removal of the executive from the positions set forth in his or her Employment Agreement; (iv) the assignment of duties or responsibilities that are materially inconsistent with the authority, duties or responsibilities of the applicable executive’s responsibilities as set forth in his or her Employment Agreement; or (v) in the case of Ms. Fox, the Company’s failure to nominate her for re-election to the Board and to use reasonable efforts to have her re-elected in connection with any election of directors upon the expiration of Ms. Fox’s then-current term on the Board. In addition, the Employment Agreements provide that certain notice and cure provisions must be satisfied in order for a termination of employment for good reason to be effective.

Generally, a disability will exist under the Employment Agreements if the applicable executive is unable to perform his or her duties or fulfill his or her obligations under the applicable executive’s Employment Agreement by reason of any physical or mental impairment for a continuous period of not less than three months.

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The Stock Plan generally provides that a “corporate change” will occur if: (i) the Company is not the surviving entity in any merger, consolidation or other business combination or reorganization (or survives only as a subsidiary); (ii) the Company sells, leases, or exchanges or agrees to sell, lease, or exchange substantially all of its assets to any other person or entity; (iii) the Company is to be dissolved and liquidated; (iv) any person or entity acquires or gains ownership or control (including, voting power) of more than 50% of the outstanding shares of the Company’s voting stock; or (v) as a result of or in connection with a contested election of directors of the Company, the persons who were directors of the Company before such election shall cease to constitute a majority of the Board.

Director Compensation

We maintain compensation guidelines for our non-employee directors (the “Non-Employee Director Compensation Guidelines”). Under the Non-Employee Director Compensation Guidelines, our non-employee directors are generally eligible to receive compensation for services they provide to us consisting of retainers and equity compensation as described below.

Each non-employee director is eligible to receive the following for their service on the Board pursuant to the Non-Employee Director Compensation Guidelines:

In addition to cash compensation, our non-employee directors are eligible to receive annual equity-based compensation consisting of restricted stock awards under the Stock Plan. The grant date fair value of the restricted stock awards granted to our non-employee directors in May 2024 pursuant to the Stock Plan, as computed in accordance with FASB ASC Topic 718, is reflected in the table below. Generally, the forfeiture restrictions applicable to the restricted stock awards lapse on the one-year anniversary of the date of grant of such awards. The restricted stock awards granted to our non-employee directors are subject to the terms and conditions of the Stock Plan and the award agreements pursuant to which such awards are granted. Each non-employee director is also reimbursed for travel and miscellaneous expenses to attend meetings and activities of the Board or its committees.

On May 9, 2023, the non-employee members of the Board were granted cash awards in the following amounts, which vested on May 9, 2024: Mr. Danner – $123,313 and Messrs. D. Baldwin, M. Baldwin, Harrell, Schwinger, Thomas, Waite and Willis – $82,201. As these awards vested and were paid during 2024, they are reflected in the table below.

Additionally, on May 7, 2024, our non-employee directors received restricted stock grants, which, except as described below with respect to Messrs. Danner, Harrell and Waite, will vest on May 7, 2025, subject to each non-employee director’s continued service on the board through the vesting date, as follows: Mr. Danner – 72,116 shares; Messrs. Baldwin, Harrell, Schwinger, Thomas, Waite and Willis – 48,077 shares each.

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On February 28, 2025, Messrs. Danner, Harrell and Waite resigned from the Board, effective as of the end of such date. In connection with such resignations, the Board approved the accelerated vesting, effective as of February 28, 2025, of their outstanding restricted stock awards granted in 2024.

Ms. Fox, as an employee of the Company, does not receive compensation for her service on the Board.

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SECURITIES AUTHORIZED FOR ISSUANCE UNDER EQUITY COMPENSATION PLANS

The following table summarizes information about our equity compensation plans as of December 31, 2024:

Our only equity compensation plan is the Stock Plan. See “Proposal 4—Approval of the Third Amendment to the Stock Plan” for a detailed description of the terms of the Stock Plan.

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PROPOSAL 1 — ELECTION OF DIRECTORS

The Board is currently comprised of six members. Our directors are divided into three classes, designated as Class I, Class II and Class III, serving staggered three-year terms, with two members in each class. At each annual meeting of stockholders, directors will be elected to succeed the class of directors whose terms have expired.

As of the date of this Proxy Statement, Ms. Peffer and Mr. Willis are assigned to Class I and are standing for election at the Annual Meeting. Messrs. Schwinger and Thomas are assigned to Class II, which Class stands for election at our 2026 Annual Meeting of Stockholders, and Ms. Fox and Mr. Baldwin are assigned to Class III, which Class stands for election at our 2027 Annual Meeting of Directors. Mr. Burnett, who will join the Board on May 3, 2025, will join Class II and stand for election at our 2026 Annual Meeting of Directors.

The Board, based on the recommendation of the Nominating, Governance and Compensation Committee, proposed that the following two nominees be elected as Class I directors at the Annual Meeting, each of whom if elected will hold office until our 2028 Annual Meeting of Stockholders and her or his successor shall have been elected and qualified, unless ended earlier due to her or his death, resignation or removal from office:

Each of the nominees is currently a director of the Company, with Ms. Peffer having served on the Board since March 1, 2025 and Mr. Willis having served on the Board since August 2018. Ms. Peffer was identified by the Nominating, Governance and Compensation Committee as a potential board candidate through NYSE Board Service, which is a complimentary service for NYSE-listed companies looking to refresh their boards. In evaluating the nominees for the Board of Directors, the Board and the Nominating, Governance and Compensation Committee took into account the qualities they seek for directors, as discussed above under “Corporate Governance,” and the directors’ individual qualifications, skills, and background that enable the directors to effectively and productively contribute to the Board’s oversight of the Company. These individual qualifications and skills are included below in each nominee’s biography, which is contained in the “Directors and Executive Officers” section above.

Each of the nominees has indicated her or his willingness to continue to serve as a member of the Board if re-elected. If, however, any of them should be unwilling or unable to serve (a contingency that the Board does not expect to occur), the Board may decrease the size of the Board or may designate substitute nominees, and the proxies will be voted in favor of any such substitute nominees.

Vote Required

Directors are elected by a “plurality” voting standard, which means that the two nominees for director who receive the greatest number of votes cast at the Annual Meeting will be elected as directors. You may vote “for” or “withhold” authority to vote for each of the nominees for the Board. Because the two nominees for director who receive the greatest number of votes cast at the Annual Meeting will be elected as directors and because “withhold” votes and broker non-votes are not considered votes cast for the foregoing purpose, “withhold” votes and broker non-votes will not affect the outcome of the voting on director elections.

Recommendation

THE BOARD OF DIRECTORS UNANIMOUSLY RECOMMENDS A VOTE “FOR” EACH NOMINEE.

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PROPOSAL 2 — RATIFICATION OF THE APPOINTMENT OF PRICEWATERHOUSECOOPERS LLP

Under the rules and regulations of the SEC and NYSE, the Audit Committee is directly responsible for the appointment, compensation, retention, and oversight of our independent registered public accounting firm. In addition, the Audit Committee oversees the work of our independent registered public accounting firm, considers the independence of such accounting firm and participates in the selection of such firm’s lead engagement partner. The Audit Committee has appointed and, as a matter of good corporate governance, is requesting ratification by our stockholders of the appointment of, PricewaterhouseCoopers LLP (“PwC”) to serve as our independent registered public accounting firm for the fiscal year ending December 31, 2025.

The Audit Committee considered a number of factors in determining whether to re-engage PwC as the Company’s independent registered public accounting firm, including the length of time the firm has served in this role, the firm’s professional qualifications and resources, the firm’s past performance, and the firm’s capabilities in handling the breadth and complexity of our business, as well as the potential impact of changing independent auditors. PwC has served as our or our predecessor’s independent registered public accounting firm since 2011.

The Board of Directors and the Audit Committee believe that the continued retention of PwC as the Company’s independent registered public accounting firm is in the best interests of the Company and its stockholders. If our stockholders do not ratify the selection of PwC, the Audit Committee may reconsider its selection of PwC as our independent registered public accounting firm for the fiscal year ending December 31, 2025, but the Audit Committee may also elect to retain PwC. In addition, if our stockholders ratify the selection of PwC as independent registered public accounting firm, the Audit Committee may nevertheless periodically request proposals from the major registered public accounting firms and as a result of such process may select PwC or another registered public accounting firm as our independent auditors.

Representatives of PwC are expected to attend the Annual Meeting and will have an opportunity to make a statement and to respond to appropriate questions from stockholders.

Audit and Other Fees

The table below sets forth the aggregate fees billed by PwC, the Company’s independent registered public accounting firm, for the last two fiscal years (in millions):

The Audit Committee or Chairman of the Audit Committee, as applicable, approved or pre-approved 100% of the services described in the table set forth above for the years ended December 31, 2024 and 2023. The Audit Committee has adopted a pre-approval policy under which the Audit Committee approves in advance all audit and non-audit services to be performed by our independent auditors. The Chairman of the Audit Committee has the authority to grant pre-approvals, provided such approvals are presented to the Audit Committee at a subsequent meeting. In determining whether to pre-approve a service to be performed by the Company’s independent auditors, the Audit Committee or Chairman of the Audit Committee, as applicable, considers

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whether such service is consistent with applicable SEC and Public Company Accounting Oversight Board (“PCAOB”) rules and guidance with respect to auditor independence.

Vote Required

Approval of this Proposal 2 requires the affirmative vote of the holders of the majority of the shares of common stock present in person or represented by proxy at the Annual Meeting and entitled to vote on the matter. You may vote “for” or “against” this proposal, or you may abstain from voting on this proposal. Abstentions will have the same effect as votes against this proposal. We believe this proposal is a “routine” matter, and as a result, we do not expect there to be any broker non-votes for this proposal.

Recommendation

THE BOARD OF DIRECTORS UNANIMOUSLY RECOMMENDS A VOTE “FOR” RATIFICATION OF THE APPOINTMENT OF PWC AS OUR INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM FOR THE FISCAL YEAR ENDING DECEMBER 31, 2025.

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PROPOSAL 3 — ADVISORY VOTE TO APPROVE NAMED EXECUTIVE OFFICER COMPENSATION

Pursuant to Section 14A of the Exchange Act, we are providing our stockholders with the opportunity to express their views on the compensation of our Named Executive Officers by casting a non-binding advisory vote on a resolution to approve the compensation of our Named Executive Officers as disclosed in “Executive and Director Compensation.” This vote is not intended to address any specific element of compensation, but instead is intended to address the overall compensation of our Named Executive Officers as disclosed in this Proxy Statement.

We believe that our executive compensation program is effective and aligned with the long-term interests of our stockholders and that the total compensation packages provided to our Named Executive Officers are reasonable in the aggregate. Accordingly, the Board invites you to review carefully the “Executive and Director Compensation” section of this Proxy Statement and cast a vote in favor of the compensation paid to our Named Executive Officers, as disclosed in such section, and adopt the following resolution:

“RESOLVED, that the stockholders approve the compensation of the Company’s named executive officers, as disclosed in the Company’s proxy statement for the 2025 Annual Meeting of Stockholders pursuant to Item 402 of Regulation S-K.”

The Board recognizes that executive compensation is an important matter for stockholders and values the opinions of our stockholders. As such, while this vote on the compensation of our Named Executive Officers is non-binding and solely advisory in nature, the Board and the Nominating, Governance and Compensation Committee will review and consider the voting results when making future decisions regarding our executive compensation program. Currently, we expect the next “say-on-pay” advisory vote will occur at our 2026 Annual Meeting of Stockholders.

Vote Required

Approval, on an advisory basis, of this Proposal 3 requires the affirmative vote of the holders of the majority of the shares of common stock present in person or represented by proxy at the Annual Meeting and entitled to vote thereon. You may vote “for” or “against” this proposal, or you may abstain from voting on this proposal. Abstentions will have the same effect as votes against this proposal. Broker non-votes will not affect the outcome of the vote on this proposal.

Recommendation

THE BOARD OF DIRECTORS UNANIMOUSLY RECOMMENDS A VOTE “FOR” THE APPROVAL, ON AN ADVISORY BASIS, OF THE COMPENSATION OF OUR NAMED EXECUTIVE OFFICERS AS DESCRIBED IN THIS PROXY STATEMENT.

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PROPOSAL 4 — APPROVAL OF THE THIRD AMENDMENT TO THE STOCK PLAN

Overview

At the Annual Meeting, our stockholders will be asked to approve the Third Amendment (the “Amendment” or the “Third Amendment”) to the Nine Energy Service, Inc. 2011 Stock Incentive Plan, as amended and restated effective February 28, 2017, as further amended effective March 5, 2021 and as further amended effective March 6, 2023, which we refer to herein as the “Stock Plan,” which Amendment would:

The following summary of the material terms of the Stock Plan, as amended to reflect the Amendment, is qualified by reference to the full text of (i) the Stock Plan, a copy of which is incorporated by reference to Exhibit 10.10 of the Company’s Registration Statement on Form S-1 filed on May 2, 2017, (ii) the First Amendment, which is included as Annex A to the Proxy Statement filed on March 8, 2021 (the “First Amendment”), (iii) the Second Amendment, which is included as Annex A to the Proxy Statement filed on March 8, 2023 (the “Second Amendment”), and (iv) the Third Amendment, which is included with this Proxy Statement as Annex A.

Background

The use of stock- and cash-based awards under the Stock Plan has been a key component of our compensation program since its original adoption. Our stockholders originally approved the Stock Plan prior to our initial public offering. The Company believes approval of the Amendment will give the Company flexibility to make grants of stock and stock-based awards under the Stock Plan over the next several years in amounts determined appropriate by the Board or the Nominating, Governance and Compensation Committee, which administers the Stock Plan. This timeline is an estimate, and our expected equity grant practices are subject to change in the future. Our equity grant practices could be affected by, among other things, the future price of our common stock, the number of employees employed, including potential new hires, the equity award grant practices and amounts of our peer companies and other competitors, and general industry or market practices. As of February 28, 2025, the closing market price of our common stock was $1.09 per share, as reported on the NYSE, and the Company had 28,464 shares of common stock that remained available for issuance pursuant to awards granted under the Stock Plan.

The Amendment will allow the Company to continue to grant equity and equity-based compensation awards to its employees and directors by increasing the number of shares of the Company’s outstanding common stock available under the Stock Plan by 3,900,000 shares. As of February 28, 2025, the total number of shares of the Company’s outstanding common stock was 42,348,643 (excluding shares held in treasury). If the Amendment is approved, the potential dilution from outstanding awards and shares available for future awards under the Stock Plan would be approximately 13.3%. This percentage is calculated on a fully diluted basis by dividing the total shares underlying outstanding equity awards as of February 28, 2025 plus the shares available for future awards under the Stock Plan (together, the numerator) by the total shares of common stock outstanding as of February 28, 2025 plus the number of shares in the numerator. Please see “—Description of the Stock Plan—Shares subject to the Stock Plan and limitations on awards to individual participants” for additional information regarding the number of additional shares being requested under the Amendment. The Company’s three-year average burn rate as of December 31, 2024 was 2.84%. This percentage is calculated by dividing the total shares underlying equity awards granted in a year by the weighted average shares outstanding during the year.

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The Amendment will not be implemented unless approved by our stockholders. If the Amendment is not approved by stockholders, the Stock Plan will remain in effect in its present form, and it is anticipated that the Company will continue to grant awards thereunder until the share reserve under the Stock Plan is exhausted.

Key Features of the Stock Plan

Description of the Stock Plan

A summary description of the material features of the Stock Plan, as amended to reflect the Amendment, is set forth below. The following summary does not purport to be a complete description of all the provisions of the Stock Plan and is qualified in its entirety by reference to the full text of (i) the Stock Plan, a copy of which is incorporated by reference to Exhibit 10.10 of the Company’s Registration Statement on Form S-1 filed on May 2, 2017, (ii) the First Amendment, which is included as Annex A to the Proxy Statement filed on March 8, 2021, (iii) the Second Amendment, which is included as Annex A to the Proxy Statement filed on March 8, 2023 and (iv) the Third Amendment, which is included with this Proxy Statement as Annex A.

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Purpose of the Stock Plan

The purpose of the Stock Plan is to provide a means through which the Company and its affiliates may attract and retain able persons to serve as directors, consultants or employees of the Company and its affiliates and to provide a means whereby those individuals upon whom the responsibilities of the successful administration and management of the Company rest, and whose present and potential contributions to the Company are of importance, can acquire and maintain stock ownership or other awards, thereby strengthening their concern for the welfare of the Company and its affiliates and their desire to remain employed by, or continue providing services to, the Company and its affiliates. A further purpose of the Stock Plan is to provide such individuals with additional incentive and reward opportunities designed to enhance the profitable growth of the Company and its affiliates. The Company seeks to achieve the Stock Plan’s purpose primarily by providing grants of a variety of awards (collectively referred to as “awards”), including, but not limited to, the following:

The Stock Plan, in part, is intended to qualify under the provisions of Section 422 of the Internal Revenue Code of 1986, as amended (the “Code”), which governs ISOs. The Stock Plan is not subject to the provisions of the Employee Retirement Income Security Act of 1974, as amended. If the Amendment is approved by our stockholders, the term of the Stock Plan will be extended to 10 years following the date of such approval. If the Amendment is approved by our stockholders, then no awards may be granted under the Stock Plan after 10 years from May 2, 2025. The Stock Plan shall remain in effect until all awards granted under the Stock Plan have been exercised, satisfied, forfeited or expired.

Administration

The Stock Plan is administered by a committee of directors selected by our Board, which is currently the Nominating, Governance and Compensation Committee (the “Committee”). The Committee has the power to determine to whom and when awards will be granted, determine the amount of awards (measured in cash or in shares of our common stock), prescribe and interpret the terms and provisions of each award agreement (the terms of which may vary), accelerate the vesting or exercisability of an award, delegate duties under the Stock Plan and execute all other responsibilities permitted or required under the Stock Plan. Subject to the constraints of applicable law, the Committee may from time to time, in its sole discretion, delegate to our Chief Executive Officer the administration (or interpretation of any provision) of the Stock Plan and the right to grant awards under the Stock Plan. The Committee may revoke any such delegation at any time, and may put any conditions

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and restrictions on the powers that may be exercised by the Chief Executive Officer upon such delegation as the Committee determines in its sole discretion.

Shares Subject to the Stock Plan and Limitations on Awards to Individual Participants

If approved by our stockholders, the Amendment will increase the number of shares of our common stock that may be issued under the Stock Plan by 3,900,000 shares. If the Amendment is approved by our stockholders, the aggregate maximum number of shares of our common stock that may be issued under the Stock Plan, and the aggregate maximum number of shares of common stock that may be issued under the Stock Plan through ISOs, will not exceed 3,928,464 shares of the Company’s common stock, subject to adjustment in a manner consistent with the Stock Plan. Shares will be deemed to have been issued under the Stock Plan only to the extent actually issued and delivered pursuant to an award. To the extent that an award lapses or the rights of its holder terminate, any shares of common stock subject to such award will again be available for the grant of an award under the Stock Plan. Shares issued under the Stock Plan that are subject to options or stock appreciation rights will not again be available for issuance if such shares are (i) shares tendered, withheld or surrendered in payment of the exercise or purchase price of such option or stock appreciation right or taxes relating to such option or stock appreciation right, (ii) shares that were not issued or delivered as a result of the net settlement or net exercise of such option or stock appreciation right or (iii) shares repurchased on the open market with the proceeds of an option’s exercise price.

Eligible Individuals

All employees, directors and consultants of the Company or any of its affiliates are eligible to receive awards under the Stock Plan. Eligible employees, directors and consultants who receive an award under the Stock Plan are referred to as “participants.” As of March 1, 2025, there were four executive officers, approximately 66 other employees, five non-employee directors and no consultants who would be eligible to participate in the Stock Plan.

Types of Awards

Options and SARs. The Stock Plan provides for two types of options: incentive stock options and non-statutory stock options. The Committee is authorized to grant options to eligible participants (which in the case of incentive stock options are only individuals who are employed by us or one of our subsidiaries at the time of grant) subject to the terms and conditions set forth below.

The exercise price per share of common stock will be determined by the Committee. However, the exercise price per share of common stock will not be less than the fair market value of a share of common stock on the date of the grant of such option regardless of whether such option is an incentive stock option or a non-statutory stock option. Further, the exercise price of any incentive stock option granted to an employee who possesses more than 10% of the total combined voting power of all classes of the Company’s common stock or of any of our subsidiaries within the meaning of Section 422(b)(6) of the Code, must be at least 110% of the fair market value of a share of common stock at the time such option is granted. The exercise price or portion thereof will be paid in full in the manner prescribed by the Committee.

The Committee determines the term of each option; provided, however, that no option may be exercisable after the expiration of 10 years from the date of grant, and any incentive stock option granted to an employee who possesses more than 10% of the total combined voting power of all classes of our common stock or of any of our subsidiaries within the meaning of Section 422(b)(6) of the Code must not be exercisable after the expiration of five years from the date of grant. The Committee also determines the time at which an option may be exercised in whole or in part (subject to the restrictions on exercisability described above), and the method by which (and the form, including cash or shares of common stock or any combination thereof having a fair market value on the exercise date equal to the relevant exercise price, in which) payment of the exercise price with respect thereto may be made or deemed to have been made. Each incentive stock option is not transferable other than by will or the laws of descent and distribution and is exercisable during the holder’s lifetime only by the holder or the holder’s guardian or legal representative.

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The Committee, in its sole discretion, may grant SARs in connection with options. SARs granted in connection with incentive stock options are exercisable only when the fair market value of our common stock exceeds the exercise price specified under the option. Option agreements may contain such other terms as determined by the Committee. The Committee is authorized to amend outstanding option agreements from time to time in any manner not inconsistent with the terms of the Stock Plan, including acceleration of the time at which the option, or a portion thereof, may be exercised, provided that unless otherwise provided for in the Stock Plan, no such amendment that materially reduces the rights of a participant may be made without such participant’s consent.

Except in connection with adjustments for certain subdivisions or consolidations of our common stock or the payment of a stock dividend as described below, without stockholder approval, the Committee cannot amend an option agreement to decrease the exercise price of the option or SARs granted in connection with the option (or otherwise grant a new option or SAR in substitution for, or upon the cancellation of, any previously granted option or SAR that has the effect of reducing the exercise price thereof).

Stock Appreciation Rights. A SAR is the right to receive a share of our common stock, or an amount in cash equal to the excess of the fair market value of one share of our common stock on the date of exercise over the grant price of the SAR, as determined by the Committee. The exercise price of a share of common stock subject to the SAR shall be determined by the Committee, but in no event shall that exercise price be less than the fair market value of our common stock on the date of grant. The Committee will have the discretion to determine other terms and conditions of a SAR award.

Restricted Stock Awards. The Committee is authorized to grant restricted stock awards to eligible participants. Pursuant to a restricted stock award, shares of common stock will be issued or delivered to the holder without any cash payment to the Company, except to the extent otherwise provided by the Committee or required by law; provided, however, that the shares will be subject to certain restrictions on the disposition thereof and certain obligations to forfeit the shares to the Company as may be determined in the discretion of the Committee. The restrictions on disposition and the forfeiture restrictions may lapse based upon: the Company’s attainment of specific performance measures established by the Committee, the holder’s continued employment with the Company or its affiliates or continued service as a consultant or director for a specified time, the occurrence of any event or the satisfaction of any other condition specified by the Committee, or a combination of these factors.

The Company retains custody of the shares of common stock issued pursuant to a restricted stock award until the disposition and forfeiture restrictions lapse. The holder may not sell, transfer, pledge, exchange, hypothecate, or otherwise dispose of the shares until the expiration of the restriction period. However, upon the issuance to the holder of shares of common stock pursuant to a restricted stock award, except for the foregoing restrictions or as otherwise provided by the Committee in the terms of a restricted stock agreement, the holder will have all the rights of a stockholder with respect to the shares, including the right to vote the shares and to receive all dividends and other distributions paid with respect to the shares. Restricted stock award agreements may contain such other terms as determined by the Committee.

Performance Awards. The Committee may, in its sole discretion, grant performance awards under the Stock Plan that may be paid in cash, shares of common stock, or a combination thereof as determined by the Committee. At the time of the grant, the Committee will establish the maximum number of shares of common stock subject to, or the maximum value of, each performance award and the performance period over which the performance applicable to the award will be measured. A performance award will terminate if the recipient’s employment or service as a consultant to or director for the Company and its affiliates terminates during the applicable performance period, except as otherwise determined by the Committee.

The receipt of cash or shares of common stock pursuant to a performance award will be contingent upon satisfaction by the Company, or any affiliate, business unit, division or department, of performance measures established by the Committee. Following the end of the performance period, the Committee will determine the

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amount payable to the holder of the performance award, based on the achievement of the performance measures for such performance period. Payment may be made in cash, shares of common stock or a combination thereof, as determined by the Committee. The payment will be made in a lump sum or in installments as prescribed by the Committee. If a performance award covering shares of common stock is to be paid in cash, then the payment will be based on the fair market value of such stock on the payment date or such other date as may be specified by the Committee. Performance award agreements may contain such other terms as determined by the Committee.

Restricted Stock Units. RSUs are rights to receive common stock, cash, or a combination of both at the end of a specified period. The Committee may subject RSUs to restrictions (which may include a risk of forfeiture) as specified in the RSU award agreement, and such restrictions may lapse at such times determined by the Committee. RSUs may be settled by delivery of common stock, cash equal to the fair market value of the specified number of shares of common stock covered by the RSUs, or any combination thereof determined by the Committee at the date of grant or thereafter. Dividend equivalents on the specified number of shares of common stock covered by RSUs may be paid on a current, deferred or contingent basis, as determined by the Committee on or following the date of grant.

Bonus Stock Awards. The Committee is authorized to grant bonus stock awards under the Stock Plan. Bonus stock awards are unrestricted shares of common stock that are subject to such terms and conditions as the Committee may determine. The Committee determines the purchase price, if any, for bonus stock awards.

Dividend Equivalents. Dividend equivalents entitle a participant to receive cash, common stock, other awards or other property equal in value to dividends paid with respect to a specified number of shares of our common stock, or other periodic payments at the discretion of the Committee. Dividend equivalents may be granted on a free-standing basis or in connection with another award (other than a restricted stock award or a bonus stock award). Any dividend or dividend equivalent credited with respect to an award (except for dividends paid following the grant of an award of unrestricted (i.e., fully vested) shares of Common Stock) shall be subject to restrictions and a risk of forfeiture to the same extent as the award with respect to which such Common Stock or other property has been distributed and shall not be delivered unless and until such award has vested and been earned.

Other Stock-Based Awards. Other stock-based awards are awards denominated or payable in, valued in whole or in part by reference to, or otherwise based on or related to, the value of the Company’s common stock. The Committee will determine the terms and conditions of such other stock-based awards.

Cash Awards. Cash awards may be granted on a free-standing basis, as an element of or a supplement to, or in lieu of any other award. Cash awards will be in such amounts and subject to such other terms as the Committee in its discretion determines to be appropriate.

Substitute Awards. Awards may be granted in substitution or exchange for any other award granted under the Stock Plan or under another equity incentive plan or any other right of an eligible person to receive payment from us. Awards may also be granted under the Stock Plan in substitution for similar awards held for individuals who become participants as a result of a merger, consolidation or acquisition of another entity by or with us or one of our affiliates.

Adjustments

The Stock Plan provides that if the Company effects a subdivision or consolidation, or a payment of a stock dividend without receipt of consideration, on the shares of common stock subject to an award, the number of shares subject to the award, and the purchase price thereunder (if applicable) are proportionately adjusted. If the Company recapitalizes, reclassifies or otherwise changes its capital structure, outstanding awards will be adjusted so that the award will thereafter cover the number and class of shares to which the holder would have been entitled if he or she had been the holder of record of the shares covered by such award immediately prior to the

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recapitalization, reclassification or other change in the Company’s capital structure. Further, the aggregate number of shares available under the Stock Plan and the individual award limitations may also be appropriately adjusted by the Committee.

Corporate Change

The Stock Plan does not provide for the automatic acceleration of vesting of outstanding awards upon a Corporate Change solely with respect to the occurrence of the Corporate Change unless the successor company fails to assume or substitute the awards in connection with that Corporate Change, unless otherwise provided in an award agreement or any applicable employment agreement, or similar agreement. In addition, the Committee may accelerate the vesting and exercise of outstanding awards (other than solely as a result of a Corporate Change if awards are assumed or substituted), cancel outstanding awards and make payments in respect thereof in cash or adjust the outstanding awards as appropriate to reflect the Corporate Change. Generally, the Stock Plan provides that a Corporate Change occurs if: (i) the Company is not the surviving entity in any merger, consolidation or other business combination or reorganization (or survives only as a subsidiary of an entity); (ii) the Company sells, leases or exchanges or agree to sell, lease or exchange all or substantially all of its assets; (iii) the Company is dissolved and liquidated; (iv) any person, entity or group acquires or gains ownership or control of more than 50% of the outstanding shares of the Company’s voting stock; or (v) after a contested election of directors, the persons who were directors before such election cease to constitute a majority of our board of directors.

Amendment and Termination of the Stock Plan

The Board in its discretion may terminate the Stock Plan at any time with respect to any shares of common stock for which awards have not been granted. The Board also has the right to alter or amend the Stock Plan or any part thereof from time to time; provided that no change in the Stock Plan may be made that would materially impair the rights of a participant without the consent of the participant. In addition, the Board may not, without approval of our stockholders, amend the Stock Plan to increase the aggregate maximum number of shares common stock that may be issued under the Stock Plan, increase the aggregate maximum number of shares of common stock that may be issued under the Stock Plan through incentive stock options, change the class of individuals eligible to receive awards under the Stock Plan or amend or delete the restrictions on the repricing of options.

No Dividends or Dividend Equivalents on Unvested Awards

Any dividend or dividend equivalent credited with respect to an award (except for dividends paid following the grant of an award of unrestricted (i.e., fully vested) shares of Common Stock) shall be subject to restrictions and a risk of forfeiture to the same extent as the award with respect to which such Common Stock or other property has been distributed and shall not be delivered unless and until such award has vested and been earned.

Transferability of Awards

Awards granted under the Stock Plan (other than incentive stock options, which are subject to special rules described above) may not be transferred other than (i) by will or the laws of descent and distribution, (ii) pursuant to a qualified domestic relations order as defined by the Code or Title I of the Employee Retirement Income Security Act of 1974, as amended, or (iii) with the consent of the Committee.

Clawback

Awards granted under the Stock Plan are subject to any written clawback policies that the Company, with the approval of the Board or an authorized committee thereof, may adopt, including any policy adopted to conform to the Dodd-Frank Wall Street Reform and Consumer Protection Act of 2010 and rules promulgated thereunder by the Securities and Exchange Commission and that the Company determines should apply to such

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Awards. Any such policy may subject Awards granted under the Stock Plan and amounts paid or realized with respect to Awards to reduction, cancelation, forfeiture or recoupment if certain specified events or wrongful conduct occur, including an accounting restatement due to the Company’s material noncompliance with financial reporting regulations or other events or wrongful conduct specified in any such clawback policy.

Federal Income Tax Consequences

The following discussion is for general information only and is intended to briefly summarize the United States federal income tax consequences to participants arising from participation in the Stock Plan. This description is based on current law, which is subject to change (possibly retroactively). The tax treatment of a participant in the Stock Plan may vary depending on his or her particular situation and may, therefore, be subject to special rules not discussed below. No attempt has been made to discuss any potential foreign, state, or local tax consequences. In addition, options and SARs with an exercise price less than the fair market value of shares of our common stock on the date of grant, SARs payable in cash, RSUs, and certain other awards that may be granted pursuant to the Stock Plan, could be subject to additional taxes unless they are designed to comply with certain restrictions set forth in Section 409A of the Code and guidance promulgated thereunder.

Tax Consequences to Participants

Non-statutory Options. In general, no federal income tax is imposed on a participant upon the grant of a non-statutory option such as those under the Stock Plan and the Company is not entitled to a tax deduction by reason of such a grant. Generally, upon the exercise of a non-statutory option, the participant will be treated as receiving compensation taxable as ordinary income in the year of exercise in an amount equal to the excess of the fair market value of the shares on the date of exercise over the exercise price paid for such shares. Upon the exercise of a non-statutory option, and subject to the application of Section 162(m) of the Code as discussed below, the Company may claim a deduction for compensation paid at the same time and in the same amount as compensation income is recognized to the participant assuming any federal income tax reporting requirements are satisfied. Upon a subsequent disposition of the shares received upon exercise of a non-statutory option, any appreciation after the date of exercise will generally qualify as capital gain.

Incentive Stock Options. Incentive stock options, or ISOs, are intended to constitute “incentive stock options” within the meaning of Section 422 of the Code. ISOs are subject to special federal income tax treatment. No federal income tax is imposed on the participant upon the grant or the exercise of an ISO if the participant does not dispose of the shares acquired pursuant to the exercise within the two-year period beginning on the date the ISO was granted or within the one-year period beginning on the date the ISO was exercised (collectively, the “holding period”). In such event, the Company would not be entitled to any deduction for federal income tax purposes in connection with the grant or exercise of the option or the disposition of the shares so acquired. With respect to an ISO, the difference between the fair market value of the stock on the date of exercise and the exercise price must be included in the participant’s alternative minimum taxable income. However, if the participant exercises an ISO and disposes of the shares received in the same year and the amount realized is less than the fair market value of the shares on the date of exercise, the amount included in alternative minimum taxable income will not exceed the amount realized over the adjusted basis of the shares.

Upon disposition of the shares received upon exercise of an ISO after the holding period, any appreciation of the shares above the exercise price will generally constitute capital gain. If a participant disposes of shares acquired pursuant to his or her exercise of an ISO prior to the end of the holding period, the participant will be treated as having received, at the time of disposition, compensation taxable as ordinary income. In such event, and subject to the application of Section 162(m) of the Code as discussed below, the Company may claim a deduction for compensation paid at the same time and in the same amount as compensation is treated as received by the participant. The amount treated as compensation is the excess of the fair market value of the shares at the time of exercise (or in the case of a sale in which a loss would be recognized, the amount realized on the sale if less) over the exercise price, and any amount realized in excess of the fair market value of the shares at the time of exercise would be treated as short-term or long-term capital gain, depending on the holding period of the shares.

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RSUs, Restricted Stock and Other Stock- or Cash-Based Awards. A participant will recognize ordinary compensation income upon receipt of cash pursuant to a cash award or, if earlier, at the time the cash is otherwise made available for the participant to draw upon. Individuals will not have taxable income at the time of grant of an RSU, but rather, will generally recognize ordinary compensation income at the time he or she receives cash or shares of common stock, as applicable, in settlement of the RSU in an amount equal to the cash or the fair market value of the shares of the Company common stock received.

A recipient of a restricted stock award or an award of unrestricted shares of common stock (i.e., bonus stock awards) generally will be subject to tax at ordinary income tax rates on the fair market value of the shares of common stock when received, reduced by any amount paid by the recipient; however, if the shares of common stock are not transferable and are subject to a substantial risk of forfeiture when received, a participant will recognize ordinary compensation income in an amount equal to the fair market value of the shares of common stock (i) when the shares of common stock first become transferable and are no longer subject to a substantial risk of forfeiture, in cases where a participant does not make a valid election under Section 83(b) of the Code, or (ii) when the award is received, in cases where a participant makes a valid election under Section 83(b) of the Code. If a Section 83(b) election is made and the shares of common stock are subsequently forfeited, the recipient will not be allowed to take a deduction for the value of the forfeited shares of common stock. If a Section 83(b) election has not been made, any dividends received with respect to a restricted stock award that are subject at that time to a risk of forfeiture or restrictions on transfer generally will be treated as compensation that is taxable as ordinary income to the recipient; otherwise the dividends will be taxed as dividends.

A participant who is an employee will be subject to withholding for federal, and generally for state and local, income taxes at the time he or she recognizes income under the rules described above. The tax basis in the shares of common stock received by a participant will equal the amount recognized by the participant as compensation income under the rules described in the preceding paragraph, and the participant’s capital gains holding period in those shares of the Company common stock will commence on the later of the date the shares of the Company common stock are received or the restrictions lapse. Subject to the application of Section 162(m) of the Code, the Company will be entitled to a deduction for federal income tax purposes that corresponds as to timing and amount with the compensation income recognized by a participant under the foregoing rules.

Tax Consequences to the Company

Reasonable Compensation. In order for the amounts described above to be deductible by the Company or a subsidiary, as applicable, such amounts must constitute reasonable compensation for services rendered or to be rendered and must be ordinary and necessary business expenses.

Golden Parachute Payments. The ability of the Company (or, if applicable, the ability of one of its subsidiaries) to obtain a deduction for future payments under the Stock Plan could also be limited by the golden parachute rules of Section 280G of the Code, which prevent the deductibility of certain “excess parachute payments” (within the meaning of Section 280G of the Code) made in connection with a change in control.

Compensation of Covered Employees. The ability of the Company (or, if applicable, the ability of one of its subsidiaries) to obtain a deduction for amounts paid under the Stock Plan could be limited by Section 162(m) of the Code. Section 162(m) of the Code limits the Company’s ability to deduct compensation, for federal income tax purposes, paid during any year to a “covered employee” (within the meaning of Section 162(m) of the Code) in excess of $1,000,000.

New Plan Benefits

The future awards, if any, that will be made to eligible individuals under the Stock Plan are subject to the discretion of the Board and the Nominating, Governance and Compensation Committee, and thus we cannot currently determine the benefits or number of shares subject to awards that may be granted to participants in the future under the Stock Plan. Therefore, the New Plan Benefits Table is not provided.

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Vote Required

Approval of this Proposal 4 requires the affirmative vote of the majority of the votes cast by the stockholders present in person or represented by proxy at the Annual Meeting and entitled to vote thereon. You may vote “for” or “against” this proposal, or you may abstain from voting on this proposal. Abstentions and broker non-votes are not considered votes cast for the foregoing purpose and will have no effect on the vote for this proposal.

Recommendation

THE BOARD OF DIRECTORS UNANIMOUSLY RECOMMENDS A VOTE “FOR” THE APPROVAL OF THE THIRD AMENDMENT TO THE STOCK PLAN.

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AUDIT COMMITTEE REPORT

The following report of the Audit Committee does not constitute soliciting material and should not be deemed filed or incorporated by reference into any future filings under the Securities Act or the Exchange Act, except to the extent we specifically incorporate this report by reference.

In connection with the preparation of the audited consolidated financial statements included in our Annual Report on Form 10-K for the year ended December 31, 2024:

Based on the review and discussions noted above, the Audit Committee recommended to the Board that the audited consolidated financial statements for the year ended December 31, 2024 be included in the Company’s Annual Report on Form 10-K for filing with the SEC.

The Audit Committee of the Board of Directors

Mark E. Baldwin

Gary L. Thomas

Darryl K. Willis

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BENEFICIAL OWNERSHIP OF SHARES

The following table sets forth certain information regarding the beneficial ownership of our common stock as of March 3, 2025 (except as otherwise indicated) by (i) each of our Named Executive Officers, (ii) each of our directors (including our nominees), (iii) all of our directors and executive officers as a group, and (iv) each person known to us to beneficially own more than 5% of our outstanding common stock (a “5% Stockholder”). Except as otherwise indicated, the persons or entities listed below have sole voting and investment power with respect to all shares of our common stock beneficially owned by them, except to the extent this power may be shared with a spouse.

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CERTAIN RELATIONSHIPS AND RELATED PERSON TRANSACTIONS

The Board has adopted a written related person transactions policy, under which a “Related Person Transaction” is defined pursuant to Item 404 of Regulation S-K. Pursuant to this policy, the Audit Committee expects to review all material facts of all Related Person Transactions and either approve or disapprove entry into the Related Person Transaction, subject to certain limited exceptions.

In determining whether to approve or disapprove entry into a Related Person Transaction, the Audit Committee expects to take into account, among other factors, the following: (i) whether the Related Person Transaction is on terms no less favorable than terms generally available to an unaffiliated third-party under the same or similar circumstances and (ii) the extent of the Related Person’s interest in the transaction. Further, the policy requires that all Related Person Transactions required to be disclosed in our filings with the SEC be so disclosed in accordance with applicable laws, rules and regulations.

The Company leases office space, yard facilities, and equipment and purchases building maintenance and repair services from entities owned by Mr. Crombie, an executive officer of the Company. Total lease expense and building maintenance and repair expense associated with these entities was $1.0 million and $1.3 million for the years ended December 31, 2024 and 2023, respectively. The Company also purchased $3.0 million and $2.9 million of products and services for the years ended December 31, 2024 and 2023, respectively, from an entity in which Mr. Crombie is a limited partner. There were outstanding payables due to these entities of $0.3 million and $0.2 million at December 31, 2024 and 2023, respectively.

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EXPENSES OF SOLICITATION

The accompanying proxy is solicited by and on behalf of the Board, and the cost of such solicitation will be borne by the Company, including the cost of the preparation, assembly, printing, mailing and posting of the Proxy Materials and any additional information furnished to our stockholders in connection with the Annual Meeting. Broadridge Financial Solutions will distribute proxy materials to beneficial owners of common stock held on the record date by such persons on behalf of banks, brokers and other nominees. AST Financial will distribute proxy materials to registered shareholders and will also provide voting and tabulation services for the Annual Meeting. We also have retained D.F. King & Co., Inc. (“D.F. King”) to aid in the distribution of Proxy Materials. D.F. King may also solicit proxies by personal interview, mail, telephone and electronic communication. For these services, we will pay D.F. King a fee of approximately $10,500 and reimburse it for certain expenses. Solicitations also may be made by personal interview, mail, telephone, and electronic communications by directors, officers, and other employees of the Company. These persons will not receive any additional compensation for assisting in the solicitation but may be reimbursed for reasonable out-of-pocket expenses in connection therewith.

OTHER MATTERS

As of the date of this Proxy Statement there are no other matters that we intend to present, or have reason to believe others will present, at the Annual Meeting. If, however, other matters properly come before the Annual Meeting, the accompanying proxy authorizes the persons named as proxies or their substitutes to vote on such matters as they determine appropriate.

PROPOSALS OF STOCKHOLDERS

To be considered for inclusion in the proxy statement and proxy card for the 2026 Annual Meeting of Stockholders of the Company (the “2026 Annual Meeting”), proposals of stockholders must be submitted in writing to the Company’s Secretary, at the address of our principal executive offices (see page 1 of this Proxy Statement), and must contain the information required by, and otherwise comply with, Rule 14a-8 under the Exchange Act. Generally, such proposals are due 120 days before the anniversary of the date we release our proxy materials for the prior year; however, if the date of the annual meeting has been changed by more than 30 days from the date of the previous year’s meeting, then the deadline is a reasonable time before we begin to print and send our proxy materials. We currently expect to hold the 2026 Annual Meeting within 30 days of May 2, 2026. Therefore, we have determined that Rule 14a-8 shareholder proposals must be received by the Company at its principal executive offices no later than November 20, 2025 unless otherwise announced by the Company prior to the 2026 Annual Meeting. The submission of a stockholder proposal does not guarantee that it will be included in our proxy statement.

In addition, our Bylaws contain advance notice procedures applicable to stockholders desiring to nominate a person as a director or propose business to be considered by stockholders at an annual meeting of stockholders, other than pursuant to Rule 14a-8 under the Exchange Act. These advance notice provisions require that, among other things, stockholders give timely written notice to the Company’s Secretary regarding such nominations or proposals and provide the information and satisfy the other requirements set forth in our Bylaws. To be timely, a stockholder who intends to present nominations or proposals at the 2026 Annual Meeting other than pursuant to Rule 14a-8 must provide the information set forth in our Bylaws to the Company’s Secretary no earlier than the close of business January 2, 2026 and no later than the close of business February 1, 2026. However, if we hold the 2026 Annual Meeting more than 30 days before or after the anniversary of this Annual Meeting date, then the information must be received not earlier than the close of business on the 120th day prior to the 2026 Annual Meeting date and not later than the close of business of (i) the 90th day prior to the 2026 Annual Meeting date or (ii) the tenth day after public disclosure of the 2026 Annual Meeting date, whichever is later. If a stockholder fails to meet these deadlines and fails to satisfy the requirements of Rule 14a-4 under the Securities Exchange Act of 1934, we may exercise discretionary voting authority under proxies we solicit to vote on any such proposal as we determine appropriate. In addition, to comply with the universal proxy rules, stockholders who

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intend to solicit proxies in support of director nominees other than the Company’s nominees must satisfy the requirements set forth in Rule 14a-19 of the Exchange Act, including providing notice to the Company that sets forth the information required by Rule 14a-19 under the Exchange Act. Such notice must be postmarked or transmitted electronically to the Company at its principal executive office no later March 3, 2026 (assuming the date of the 2026 Annual Meeting has not been changed by more than 30 days from the anniversary date of this Annual Meeting). If the date of the 2026 Annual Meeting is changed by more than 30 days from the anniversary date of this Annual Meeting, then notice must be provided by the later of 60 days prior to the date of the 2026 Annual Meeting or the tenth day following the day on which public announcement of the date of the 2026 Annual Meeting of shareholders is first made by the Company.

We reserve the right to reject, rule out of order, or take other appropriate action with respect to any nomination or proposal that does not comply with these and other applicable requirements set forth in our Bylaws and the applicable rules and regulations of the SEC.

HOUSEHOLDING; AVAILABILITY OF ANNUAL REPORT AND PROXY STATEMENT

We are providing our notice of the Annual Meeting (the “Notice”), access to this Proxy Statement and our annual report to security holders for the year ended December 31, 2024 (the “2024 Annual Report”) via the “Notice and Access” method. For those stockholders who request paper copies of the foregoing documents and share the same last name and address, they may receive one copy of the Notice, Proxy Statement and 2024 Annual Report, unless we receive contrary instructions from any stockholder at that address. This practice, known as “householding,” is designed to reduce the volume of duplicate information and reduce printing and postage costs. Each street name stockholder receiving this Proxy Statement by mail will continue to receive a separate voting instruction form.

If you would like an additional copy of the 2024 Annual Report or this Proxy Statement, these documents are available in digital form for download or review by visiting our website at https://investor.nineenergyservice.com. Alternatively, we will promptly send a copy of these documents to you without charge upon request by mail to Investor Relations, Nine Energy Service, Inc., 2001 Kirby Drive, Suite 200, Houston, Texas 77019, or by calling 281-730-5113. If you would like to revoke your consent to householding and in the future receive your own set of proxy materials (or your own Notice of Internet Availability of Proxy Materials, as applicable), or if your household is currently receiving multiple copies of the same items and you would like in the future to receive only a single copy at your address, please contact us by mail at Investor Relations, Nine Energy Service, Inc., 2001 Kirby Drive, Suite 200, Houston, Texas 77019, or by calling 281-730-5113.

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Annex A

THIRD AMENDMENT TO THE

NINE ENERGY SERVICE, INC.

2011 STOCK INCENTIVE PLAN

THIS THIRD AMENDMENT (this “Amendment”) to the Nine Energy Service, Inc. 2011 Stock Incentive Plan, as amended and restated effective February 28, 2017, as further amended effective March 5, 2021, and as further amended March 6, 2023 (the “Plan”), is effective February 28, 2025, subject to approval by the Company’s stockholders (the “Effective Date”).

W I T N E S S E T H:

WHEREAS, Nine Energy Service, Inc., a Delaware corporation (the “Company”), previously adopted the Plan pursuant to which the Company is authorized to grant equity and equity-based incentive awards to certain employees and other service providers of the Company and its subsidiaries;

WHEREAS, Paragraph XVII of the Plan provides that the Board of Directors of the Company (the “Board”) may amend the Plan from time to time, including to extend the duration of the Plan and to increase the aggregate maximum number of shares that may be issued under the Plan with the approval of the Company’s stockholders;

WHEREAS, the Board desires to amend the plan to (i) increase the aggregate maximum number of shares common stock, par value $0.01 per share, of the Company available for issuance under the Plan by 3,900,000 shares and (ii) extend the duration of the Plan as set forth herein, subject to the approval of the Company’s stockholders; and

WHEREAS, the Board has determined that it is desirable and in the best interests of the Company to amend the Plan in the manner contemplated hereby, subject to approval by the Company’s stockholders at the Company’s upcoming annual meeting to be held on May 2, 2025 (the “Annual Meeting”).

NOW, THEREFORE, the Plan shall be amended as follows, effective as of the Effective Date:

“Third Amendment Effective Date” means May 2, 2025.

“No further Awards may be granted under the Plan after 10 years from the Third Amendment Effective Date.”

“Subject to adjustment in the same manner as provided in Paragraph XVI with respect to shares of Common Stock subject to Options then outstanding, the aggregate maximum number of shares of Common Stock that may be issued under the Plan, and the aggregate maximum number of shares of Common Stock that may be issued under the Plan through Incentive Stock Options, from and after the Third Amendment Effective Date shall not exceed 3,928,464 shares of Common Stock.”

A-1

[Signature Page Follows]

A-2

IN WITNESS WHEREOF, the Company has caused the execution of this Third Amendment by its duly authorized officer, effective as of the Effective Date.

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ANNUAl meeTiNG of sTocKholDeRs of NiNe eNeRGY seRvice, Page iNc. may 2, 2025 PRoXY voTiNG iNsTRUcTioNs iNTeRNeT—Access “www.voteproxy.com” and follow the on-screen instructions or scan the QR code with your smartphone. Have your proxy card available when you access the web page. TelePhoNe—Call toll-free 1-800-PRoXies (1-800-776-9437) in the United States or 1-201-299-4446 from foreign countries from any touch-tone telephone and follow the instructions. Have your proxy card available when you call. Vote online/phone until 11:59 PM EST the day before the meeting. comPANY NUmBeR mAil—Sign, date and mail your proxy card in the envelope provided as soon as possible. iN PeRsoN—You may vote your shares in person by attending AccoUNT NUmBeR the Annual Meeting. Go GReeN—e-Consent makes it easy to go paperless. With e-Consent, you can quickly access your proxy material, statements and other eligible documents online, while reducing costs, clutter and paper waste. Enroll today via https://equiniti.com/us/ast-access to enjoy online access. NoTice of iNTeRNeT AvAilABiliTY of PRoXY mATeRiAl: The Notice of Meeting, annual report, proxy statement and proxy card are available at—https://investor.nineenergyservice.com Please detach along perforated line and mail in the envelope provided IF you are not voting via telephone or the Internet. 0230303000000001000 7 050225 The BoARD of DiRecToRs RecommeNDs A voTe “foR” elecTioN of These NomiNees foR DiRecToR iN PRoPosAl 1, A voTe “foR” PRoPosAl 2, A voTe “foR” PRoPosAl 3 AND A voTe “foR” ê¢PRoPosAlê¢4. PleAse siGN, DATe AND ReTURN PRomPTlY iN The eNcloseD eNveloPe. PleAse mARK YoUR voTe iN BlUe oR BlAcK iNK As shoWN heRe x 1. Election of Class I Directors FOR AGAINST ABSTAIN 2. Ratification of the appointment of PricewaterhouseCoopers LLP as the independent registered public accounting firm of the Company NomiNees: for the fiscal year ending December 31, 2025 FOR ALL NOMINEES O Darryl K. Willis FOR AGAINST ABSTAIN O Julie A. Peffer 3. Approval, on an advisory basis, of the compensation of our named WITHHOLD AUTHORITY FOR ALL NOMINEES executive officers FOR ALL EXCEPT FOR AGAINST ABSTAIN (See instructions below) 4. Approval, of the Third Amendment to the 2011 Stock incentive Plan This proxy, when properly executed, will be voted in the manner directed herein. if no direction is made, this proxy will be voted in the manner recommended by the Board of Directors as stated herein as appropriate. in their discretion, the Named Proxies are authorized to vote upon such other matters that may properly come before the Annual meeting or any adjournment or postponement thereof. INSTRUCTIONS:and To withhold fill in the authority circle next to vote to each for any nominee individual you wish nominee(s), to withhold, mark as “FOR shown ALL here: EXCEPT”MARKꢓX” HERE IF YOU PLAN TO ATTEND THE MEETING. To indicate change your the new address address on your in the account, address please space check above. thePlease box at note right and that changes this method. to the registered name(s) on the account may not be submitted via Signature of StockholderDateSignature of StockholderDateNote: title Please as such. sign exactly If the signer as your is a name corporation, or names please appear sign on full this corporate Proxy. When name shares by duly are authorized held jointly, officer, each giving holder full should title as sign. such.WhenIf signer signing is a as partnership, executor, please administrator, sign in attorney, partnership trustee name or by guardian, authorized please person. give full

0 NINE ENERGY SERVICE, INC. Proxy for Annual meeting of stockholders on may 2, 2025 This Proxy is solicited on Behalf of the Board of Directors.The undersigned hereby appoints Ann G. Fox and Theodore R. Moore, and each or either of them, as the true and lawful attorneys of the undersigned, with full power of substitution and revocation, and authorizes them, and each of them, to vote all the shares of capital stock of Nine Energy Service, Inc. which the undersigned is entitled to vote at said meeting and any adjournment thereof upon the matters specified and upon such other matters as may be properly brought before the meeting or any adjournment thereof, conferring authority upon such true and lawful attorneys to vote in their discretion on such other matters as may properly come before the meeting and revoking any proxy heretofore given. You are encouraged to specify your choice by marking the appropriate box (see ReveRse siDe) but you need not mark any box if you wish to vote in accordance with the Board of Directors’ recommendation. The Named Proxies cannot vote your shares unless you sign and return this card. (continued and to be signed on the reverse side) 1.1 14475