SEACOR Marine Holdings Inc.

12121 Wickchester Lane

Suite 500

Houston, TX 77079

Notice of 2023 Annual Meeting

And

Proxy Statement

SEACOR Marine Holdings Inc.

12121 Wickchester Lane

Suite 500

Houston, TX 77079

April 20, 2023

Dear Stockholder:

You are cordially invited to attend the 2023 Annual Meeting of Stockholders (the “Annual Meeting”) of SEACOR Marine Holdings Inc. (the “Company”) on Tuesday, June 6, 2023, at 9:00 a.m. (EDT). The Annual Meeting will be a completely “virtual meeting,” held via a live audio webcast at www.proxydocs.com/SMHI. All holders of record of the Company’s outstanding Common Stock at the close of business on April 17, 2023, will be entitled to vote at the Annual Meeting. Your virtual attendance at the 2023 Annual Meeting affords you the same rights and opportunities to participate as you would have at an in-person annual meeting, including the ability to vote and submit questions electronically prior to and during the meeting. We believe the virtual Annual Meeting format will enhance stockholder access and encourage participation and communication with our Board of Directors and Management.

Directors, officers and other representatives of the Company are expected to be available at the virtual Annual Meeting and they will be pleased to answer any questions you may have.

Whether or not you expect to attend the Annual Meeting and regardless of the number of shares of the Company’s Common Stock you own, you are encouraged to carefully read the enclosed Proxy Statement and the Company’s Annual Report to Stockholders on Form 10-K for the fiscal year ended December 31, 2022 (the “2022 Annual Report”). You may vote your shares over the Internet at www.proxypush.com/SMHI or via the toll-free telephone number included herein. If you received a paper copy of a proxy or voting instruction card by mail, you may instead submit your proxy or voting instruction card for the Annual Meeting by completing, signing, dating and returning your proxy or voting instruction card in the pre-addressed envelope provided. Submitting a vote before the Annual Meeting will not preclude you from voting your shares at the virtual Annual Meeting should you decide to join the webcast.

We hope that you will be able to attend the virtual Annual Meeting.

For the Board of Directors,

Andrew R. Morse

Non-Executive Chairman of the Board

SEACOR Marine Holdings Inc.

12121 Wickchester Lane

Suite 500

Houston, TX 77079

April 20, 2023

To Our Stockholders:

The 2023 Annual Meeting of Stockholders (the “Annual Meeting”) of SEACOR Marine Holdings Inc. (the “Company”) will be held on Tuesday, June 6, 2023, at 9:00 a.m. (EDT), exclusively online via a live audio webcast at www.proxydocs.com/SMHI, for the following purposes:

Only holders of record of the Company’s Common Stock at the close of business on April 17, 2023, will be entitled to notice of and to vote at the virtual Annual Meeting. See the “Solicitation of Proxies, Voting and Revocation” section of the accompanying Proxy Statement for the place where the list of stockholders may be examined. The accompanying Proxy Statement is being first sent to stockholders on or about May 4, 2023.

Your vote is very important! Whether or not you plan to attend the virtual Annual Meeting, you are encouraged to read the enclosed Proxy Statement and 2022 Annual Report carefully and submit your proxy or voting instructions promptly so that your shares of the Company’s Common Stock may be represented at the Annual Meeting. You may vote your shares over the Internet at www.proxypush.com/SMHI, by phoning the toll-free telephone number on the voting instruction card, or by completing, signing, dating and returning the enclosed proxy card. If you attend the virtual Annual Meeting by webcast, you may revoke your proxy and vote your shares electronically at the virtual meeting. See “Attending the Annual Meeting Virtually” and “Voting and Quorum” in the accompanying Proxy Statement for additional instructions and information on voting.

For the Board of Directors,

Andrew H. Everett II

Senior Vice President,

General Counsel and Secretary

TABLE OF CONTENTS

SEACOR Marine Holdings Inc.

12121 Wickchester Lane

Suite 500

Houston, TX 77079

Notice of 2023 Annual Meeting

And

Proxy Statement

SOLICITATION OF PROXIES, VOTING AND REVOCATION

Voting and Quorum

A list of the Company’s stockholders as of the close of business on April 17, 2023 (the “Record Date”) will be available for examination by any stockholder, for purposes germane to the virtual Annual Meeting, during ordinary business hours for the ten-day period prior to the date of the Annual Meeting, at the offices of the Company, 12121 Wickchester Lane, Suite 500, Houston, Texas 77079.

Only record holders of our common stock, $0.01 par value per share (“Common Stock”), as of the Record Date will be entitled to vote at the Annual Meeting. Our authorized capital stock currently consists of 60,000,000 shares of Common Stock. At the close of business on the Record Date, there were 27,096,812 shares of Common Stock outstanding and entitled to vote. Each stockholder of record is entitled to one vote for each share held on the Record Date on all matters that may properly come before the Annual Meeting. There are no dissenter or appraisal rights relating to the matters to be acted upon at the Annual Meeting.

Stockholders are requested to vote in one of the following ways:

We recommend that you vote by phone, Internet, or proxy even if you plan to virtually attend the Annual Meeting.

Shares of Common Stock represented by properly executed proxy cards or voted by telephone or Internet that are received by the Company and not subsequently revoked will be voted at the Annual Meeting in accordance with the instructions contained therein or if no instructions are contained in the proxy, as described below under “Proxy Cards.”

A quorum for the transaction of business at the Annual Meeting requires the holders of record of a majority in voting power of the then issued and outstanding shares of all classes and series of stock of the Company entitled to vote at the meeting, in person or by proxy.

For Proposal 1 (Election of Directors), election of the director nominees to the board of directors of the Company (the “Board”) requires the affirmative vote of a plurality of the shares of Common Stock present virtually or represented by proxy at the Annual Meeting and entitled to vote, which means that the five nominees receiving the most “for” votes will be elected. Because there are only five director nominees named in this Proxy Statement, votes withheld from any nominee will have no effect on the outcome of the election of directors. Votes may not be cast “against” the election of a nominee. Abstentions and “broker non-votes” (as described below) are not counted for purposes of the election of directors and will not affect the outcome of such election. Our stockholders do not have cumulative voting rights for the election of directors.

Matters to be considered at the meeting other than the election of directors require the vote of the holders of a majority in voting power of the shares entitled to vote present at the meeting in person or by proxy.

For Proposal 2 (Say on Pay) and Proposal 4 (Ratification of the Appointment of Independent Registered Public Accounting Firm), stockholders may vote in favor of or against the proposal or may abstain from voting.

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With respect to Proposal 3 (Say on Frequency), stockholders are being given the opportunity to choose among four options (holding the Say on Pay vote every year, every other year, every three years, or abstaining). The frequency option (every year, every other year, or every three years) receiving the vote of holders of a majority in voting power of the shares entitled to vote present in person or by proxy will be the frequency that stockholders approve. In the event that no option receives a majority based on this voting standard, we will consider the option that receives the most votes to be the option selected by our stockholders.

Because abstentions are treated as both “present” and “entitled to vote” on a matter, abstaining has the same effect as a vote “against” the proposal. For a discussion of the treatment of “broker non-votes,” see “Shares Held in Street Name.”

Because your votes on Proposal 2 (Say on Pay) and Proposal 3 (Say on Frequency) are advisory in nature, the results will not be binding on the Company, the Board, or the Compensation Committee. However, the Board and the Compensation Committee will review and consider the voting results when making future decisions regarding executive compensation and regarding the frequency of the advisory vote on executive compensation.

The below table summarizes the voting requirements to elect directors and to approve each of the other proposals in the Proxy Statement.

Shares Held in Street Name

If you hold your shares in “street name” as of the close of business on the Record Date, you may gain access to the meeting by following the instructions in the voting instruction card provided by your broker, bank or other nominee. You may not vote your shares electronically at the Annual Meeting unless you receive a valid proxy from your brokerage firm, bank, broker dealer or other nominee holder.

A “broker non-vote” occurs when a nominee holding shares for a beneficial owner does not vote on a particular proposal because the nominee does not have discretionary voting power with respect to that item and has not received instructions from the beneficial owner. On routine matters, brokers have the discretion to vote shares held in “street name” – a term that means the shares are held in the name of the broker on behalf of its customer, the beneficial owner. If your shares are held in “street name” by a broker and you wish to vote on the proposal to elect the directors (Proposal 1), the advisory vote to approve named executive officer compensation (Proposal 2), the advisory vote to approve the frequency of advisory votes to approve named executive officer compensation (Proposal 3), or to act upon any other non-routine business that may properly come before the Annual Meeting, you should provide instructions to your broker. Under the rules of the New York Stock Exchange (the “NYSE”), if you do not provide your broker with instructions, your broker generally will only have the authority to vote on the ratification of the appointment of Grant Thornton LLP, as the Company’s independent registered public accounting firm (Proposal 4). All other matters at the Annual Meeting are expected to be non-routine and therefore brokers will not be entitled to vote on a beneficial

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owner’s behalf without voting instructions or discretionary authority on such matters. Because broker non-votes are outstanding shares that are not entitled to vote on non-routine matters, they will have no effect on the outcomes of Proposal 2 and Proposal 3.

Proxy Cards

If you sign and return your proxy card but do not specify how your shares of Common Stock are to be voted, they will be voted: FOR election as a director of each of the nominees named under “Proposal No. 1 – Election of Directors” in this Proxy Statement and listed under Item 1 of the enclosed proxy card; FOR “Proposal No. 2 – Advisory Vote to Approve Named Executive Officer Compensation” in this Proxy Statement and listed under Item 2 of the enclosed proxy card; “EVERY YEAR” for “Proposal No. 3 – Advisory Vote to Approve the Frequency of Advisory Votes to Approve Named Executive Officer Compensation” in this Proxy Statement and listed under Item 3 of the enclosed proxy card; and FOR “Proposal No. 4 – Ratification of the Appointment of Independent Registered Public Accounting Firm” in this Proxy Statement and listed under Item 4 of the enclosed proxy card. If other matters are properly presented at the Annual Meeting for consideration, the persons named in the proxy will have the discretion to vote on those matters for the stockholder.

As a matter of policy, proxy cards, ballots and voting tabulations that identify individual stockholders are kept confidential by the Company. Such documents are made available only to the inspector of election and personnel associated with processing proxies and tabulating votes at the Annual Meeting. The votes of individual stockholders will not be disclosed except as may be required by applicable law.

Attending the Annual Meeting Virtually

The Annual Meeting will be a completely virtual meeting of stockholders conducted exclusively by a live audio webcast. Only record or beneficial owners of Common Stock as of the Record Date may attend the Annual Meeting, vote their shares and submit online questions.

In order to attend the Annual Meeting, you must register at www.proxydocs.com/SMHI. Upon completing your registration, you will receive further instructions via email, including a unique link that will allow you access to the Annual Meeting and to vote and submit questions during the Annual Meeting. As part of the registration process, you must enter the control number located on your proxy card, or voting instruction card. If you are a beneficial owner of shares registered in the name of a broker, bank or other nominee, you will also need to provide the registered name on your account and the name of your broker, bank or other nominee as part of the registration process.

The Annual Meeting will begin promptly at 9:00 a.m. (EDT), with online check-in beginning at 8:45 a.m. (EDT). Stockholders must use the unique link emailed to them upon completing their registration to access the Annual Meeting.

If you wish to submit a question for the Annual Meeting, you may do so in advance of the meeting at www.proxydocs.com/SMHI or at any point during the Annual Meeting (until the floor is closed to questions).

Revocation of Proxies

A stockholder who so desires may revoke his, her, or its proxy at any time before it is exercised at the Annual Meeting by: (i) providing written notice to the Secretary of the Company; (ii) duly executing a proxy card bearing a date subsequent to that of a previously furnished proxy card; (iii) entering new instructions by Internet or telephone; or (iv) attending the webcast of the Annual Meeting and voting virtually. Attendance at the Annual Meeting will not in itself constitute a revocation of a previously furnished proxy. Stockholders who attend the Annual Meeting need not revoke their proxy (if previously furnished) to vote virtually at the meeting. The Company encourages stockholders that plan to join the Annual Meeting to vote by phone or Internet or to submit a valid proxy card and vote their shares prior to the Annual Meeting. Even after you have voted electronically through the Internet or by telephone or submitted your proxy card, you may change your

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vote at any time before the proxy is exercised at the Annual Meeting by joining the webcast. See “Attending the Annual Meeting Virtually” above. If you hold your shares in “street name” and want to revoke your proxy, you will need to follow the instructions of your broker to revoke or change your previous vote.

Important Notice Regarding the Availability of Proxy Materials for the Annual Meeting to be Held on June 6, 2023

This Proxy Statement and the enclosed proxy card, the Notice of Annual Meeting, and the Company’s 2022 Annual Report are available on the Internet at https://ir.seacormarine.com/financial-information/annual-reports-and-proxy-statements.

Solicitation Expenses

The Company will bear the costs of solicitation of proxies for the Annual Meeting. In addition to solicitation by mail, directors, officers and employees of the Company may solicit proxies from stockholders by telephone, electronic or facsimile transmission, personal interview or other means.

The Company has requested brokers, bankers and other nominees who hold voting stock of the Company to forward proxy solicitation materials to their customers and such nominees will be reimbursed for their reasonable out-of-pocket expenses.

We have retained D.F. King & Co., Inc. to aid in the solicitation of proxies. The fees of D.F. King & Co., Inc. are $8,500 plus reimbursement of its reasonable out-of-pocket costs. If you have questions about the Annual Meeting or need additional copies of this Proxy Statement or additional proxy cards, please contact our proxy solicitation agent as follows:

D.F. King & Co., Inc.

48 Wall Street, 22nd Floor

New York, NY 10005

Banks and Brokerage Firms, please call (212) 269-5550.

Stockholders, please call (800) 769-7666.

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CORPORATE GOVERNANCE

Board Leadership Structure

The Board believes that there is no single organizational model that would be most effective in all circumstances and that it is in the best interests of the Company and its stockholders for the Board to retain the authority to modify its leadership structure to best address the Company’s circumstances from time to time.

The Board believes that the most effective leadership structure for the Company at the present time is to maintain the separate positions of Non-Executive Chairman and Chief Executive Officer. Separating these positions allows the Chief Executive Officer to focus on the full-time job of running the Company’s business, while allowing the Non-Executive Chairman to lead the Board in its fundamental role of providing advice to and independent oversight of management. The Board believes this structure recognizes the time, effort, and energy that the Chief Executive Officer is required to devote to his position in the current business environment, as well as the commitment required to serve as the Company’s Non-Executive Chairman, particularly as the Board’s oversight responsibilities continue to grow and demand more time and attention. The Board also believes that separating the Non-Executive Chairman and Chief Executive Officer positions provides enhanced independent leadership and oversight for the Company, management and the Board.

In addition to the role that the Non-Executive Chairman has with regard to the Board, the chairperson of each of the three independent key committees of the Board (Audit Committee, Compensation Committee and Nominating and Corporate Governance Committee) and each individual director is responsible for helping ensure that meeting agendas are appropriate and that sufficient time and information are available to address issues that the directors believe are significant and warrant their attention. Each director has the opportunity and ability to request agenda items, information, and additional meetings of the Board or of the independent directors.

The Board has adopted significant processes designed to support the Board’s capacity for objective judgment, including executive sessions of the independent directors at Board meetings at which no employees are present, independent evaluation of, and communication with, members of senior management, and rigorous self-evaluation of the Board, its committees, and its leadership. These and other critical governance processes are reflected in the Corporate Governance Guidelines and the various Committee Charters that are available on the Company’s website at www.seacormarine.com by navigating to “Investors,” and clicking “Corporate Governance.” The Company’s website and the information contained therein or connected thereto shall not be deemed to be incorporated into this Proxy Statement. The Board has also provided mechanisms for stockholders to communicate in writing with the Non-Executive Chairman of the Board, with the non-management and/or independent directors, and with the full Board on matters of significance. These processes are outlined below under “Communications with the Board or Independent Directors.”

Board of Directors and Director Independence

The business and affairs of the Company are managed under the direction of the Board. The Company’s Third Amended and Restated By-Laws (the “By-Laws”) provide that the Board will consist of not less than five and not more than twelve directors. Currently, the Board is composed of five directors.

During 2022, the Board held five meetings. The Board also acted pursuant to unanimous written consent on nine other occasions. Each of the current directors attended at least 75% of the combined total meetings of the full Board and the committees on which they served during 2022. We encourage members of our Board to attend our Annual Meeting of Stockholders. All members of our Board attended the 2022 annual meeting of stockholders and plan to virtually attend the 2023 Annual Meeting.

Our Board consults with legal counsel to ensure that the Board’s independence determinations are consistent with all relevant securities and other laws and regulations regarding director independence, including the requirements of the New York Stock Exchange. To assist in the Board’s independence determinations, each director completed materials designed to identify any relationships that could affect the director’s independence. In addition, through discussions among our directors, a subjective analysis of independence is undertaken by the Nominating and Corporate Governance Committee. Our Board is currently composed of a majority of independent directors,

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with the Board having made the affirmative determination that each of Messrs. Andrew R. Morse and R. Christopher Regan, and Ms. Julie Persily, is independent as such term is defined by the applicable rules and regulations of the NYSE. Additionally, each of these directors meets the categorical standards for independence established by the Board (the “SEACOR Marine Categorical Standards”). A copy of the SEACOR Marine Categorical Standards is available on the Company’s website at www.seacormarine.com by navigating to “Investors,” and clicking “Corporate Governance” (entitled “Director Independence Standards”).

The schedule of Board meetings is made available to directors in advance along with the agenda for each meeting so that they may review and request changes. Directors also have unrestricted access to management at all times and regularly communicate informally with management on an assortment of topics. The Company’s Chief Executive Officer hosts a monthly conference call with the directors and other senior management to discuss recent business developments and other matters.

Carlyle Board Rights

On October 5, 2022, the Company and certain funds affiliated with The Carlyle Group Inc. (“Carlyle,” and such investors, the “Carlyle Investors”) entered into two agreements pursuant to which the Company issued the Carlyle Investors (i) $90.0 million in aggregate principal amount of the Company’s 8.0% / 9.5% Senior PIK Toggle Notes due 2026 (the “Guaranteed Notes”) and (ii) $35.0 million aggregate principal amount of the Company’s 4.25% Convertible Senior Notes due 2026 (the “New Convertible Notes”) in exchange for all $125.0 million in aggregate principal amount of the Company’s existing convertible notes (the “Old Convertible Notes”) (the “Exchange Transaction”). The New Convertible Notes were issued pursuant to the Exchange Agreement (Convertible Notes) among the Company, as issuer, and the Carlyle Investors (the “Convertible Notes Exchange Agreement”).

Consistent with the requirements of the documents governing the Old Convertible Notes, the Convertible Notes Exchange Agreement requires the Company to use reasonable best efforts, subject to its directors’ fiduciary duties, to cause a person designated by Carlyle (if Carlyle so chooses) to be appointed as a director on the Board, if Carlyle, solely as a result of the conversion of the Convertible Notes for shares of our Common Stock, collectively owns or continues to own (or would own upon conversion), 10.0% or more of our outstanding shares of Common Stock on a fully diluted basis (the “Board Appointment Right”). The Board Appointment Right was previously contained in the note purchase agreement (“Note Purchase Agreement”) and the investment agreement (the “Investment Agreement”), by and between the Company and Carlyle in connection with the issuance of the Old Convertible Notes.

During 2017 and the beginning of 2018, Ferris Hussein served on the Board as the director designated by Carlyle until April 17, 2018, when he resigned. Since Mr. Hussein’s resignation from the Board, Carlyle has determined not to exercise its right to designate a director. Carlyle was also provided a right to appoint a board observer under certain circumstances. A representative of Carlyle observes meetings of the Board pursuant to Carlyle’s observer rights under the Convertible Notes Exchange Agreement. This observation right will terminate at the time Carlyle owns less than the lesser of (i) $50.0 million in aggregate principal amount of New Convertible Notes and Guaranteed Notes and (ii) New Convertible Notes and Guaranteed Notes and warrants representing 5.0% of the Common Stock outstanding on a fully diluted basis, assuming the conversion of all such New Convertible Notes held by Carlyle and the exercise of the warrants. Carlyle has exercised this observer right with respect to most board meetings during 2022 and we expect they will continue to do so as long as they maintain that right under the Convertible Notes Exchange Agreement.

Executive Sessions

Directors meet at regularly scheduled executive sessions without any members of management present to discuss issues relating to management performance and any other issue that may involve a potential conflict of interest with management. Executive sessions are generally presided over by the Company’s Non-Executive Chairman, Mr. Morse, who is responsible for:

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Committees of the Board of Directors

The Board has established the following committees, each of which operates under a written charter that is available on the Company’s website at www.seacormarine.com by navigating to “Investors,” and clicking “Corporate Governance.”

Audit Committee

The Audit Committee is composed of three members: Messrs. Morse and Regan, and Ms. Persily, all of whom served since the last annual meeting of stockholders and continue to serve on the Audit Committee. Mr. Morse is the Audit Committee Chairman. The Board has determined that Mr. Morse is an “audit committee financial expert” for purposes of the rules of the Securities and Exchange Commission (“SEC”). In reaching this determination, the Board considered, among other things, Mr. Morse’s over 25 years of experience as an investment banker, in addition to his other experience that is described below. In addition, the Board determined that each member of the Audit Committee is financially literate, as required under the NYSE standards, and is considered independent, as defined by the rules of the NYSE applicable to Audit Committee members, Section 10A(m)(3) of the Securities Exchange Act of 1934, as amended (the “Exchange Act”), and in accordance with the SEACOR Marine Categorical Standards. The Audit Committee is expected to meet at least quarterly. The Audit Committee met four times during 2022 and acted pursuant to unanimous written consent on two other occasions.

Committee Function. The Audit Committee assists the Board in fulfilling its responsibility to oversee, among other things:

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The Audit Committee’s role is one of oversight. Management is responsible for preparing the Company’s financial statements and the independent registered public accounting firm is responsible for auditing those financial statements. Management has more time, knowledge and detailed information about the Company than do Audit Committee members. Consequently, in carrying out its oversight responsibilities, the Audit Committee will not provide any expert or special assurance as to the Company’s financial statements or any professional certification as to the independent registered public accounting firm’s work.

Compensation Committee

The Compensation Committee is composed of three members: Messrs. Regan and Morse, and Ms. Persily, all of whom served since the last annual meeting of stockholders and continue to serve on the Compensation Committee. Mr. Regan is the Compensation Committee Chairman. The Board has determined that each member of the Compensation Committee is independent, as defined by the rules of the NYSE applicable to Compensation Committee members and in accordance with the SEACOR Marine Categorical Standards. The Compensation Committee met four times during 2022 and acted pursuant to unanimous written consent on one other occasion.

Committee Function. Pursuant to its charter, the Compensation Committee is primarily responsible for, among other things:

The Chairman of the Compensation Committee sets the agenda for the meetings of the Compensation Committee with the input from the Company’s executive management. Members of executive management may also attend meetings, if requested. At each meeting, the Compensation Committee has the opportunity to meet in executive session. When the Compensation Committee acts without the approval of the full Board, the Chairman of the Compensation Committee reports the Compensation Committee’s actions regarding compensation to the full Board. The Compensation Committee has the sole authority to retain, obtain the advice of, and terminate, any compensation consultants, independent legal counsel or other advisors to assist the Compensation Committee in its discharge of its duties and responsibilities, including the evaluation of director or executive officer compensation.

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Compensation Committee Interlocks and Insider Participation. None of the current members of the Compensation Committee is or ever was an officer or employee of the Company. During 2022, none of the Company’s executive officers served as a director or member of the compensation committee of any other entity whose executive officers serve on the Board or the Compensation Committee.

Nominating and Corporate Governance Committee

The Nominating and Corporate Governance Committee is composed of three members: Messrs. Regan and Morse, and Ms. Persily, all of whom served since the last annual meeting of stockholders and continue to serve on the Nominating and Corporate Governance Committee. Mr. Regan is the Nominating and Corporate Governance Committee Chairman. The Board has determined that each member of the Nominating and Governance Committee is independent, as defined by the rules of the NYSE and in accordance with the SEACOR Marine Categorical Standards. The Nominating and Corporate Governance Committee met four times during 2022.

Committee Function. The Nominating and Corporate Governance Committee assists the Board with:

Selection of Nominees for the Board of Directors. To fulfill its responsibility to recruit and recommend to the full Board nominees for election as directors, the Nominating and Corporate Governance Committee reviews the composition of the full Board at least annually to determine the qualifications and areas of expertise needed to further enhance the composition of the Board and works with management in attracting candidates with those qualifications.

In identifying new director candidates, the Nominating and Corporate Governance Committee seeks advice and names of candidates from Nominating and Corporate Governance Committee members, other members of the Board, members of management and other public and private sources. The Nominating and Corporate Governance Committee, in formulating its recommendation of candidates to the Board, considers each candidate’s personal qualifications and how such personal qualifications effectively address the then-perceived current needs of the Board. The minimum qualifications and criteria for membership on the Board include the following:

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The Nominating and Corporate Governance Committee also considers the diversity of the Board as well as potential candidates as to business experiences, educational and professional backgrounds and gender, race and ethnicity in recruiting and recommending candidates for election.

After the Nominating and Corporate Governance Committee completes its evaluation, it presents its recommendations to the Board for consideration and approval. The Nominating and Corporate Governance Committee has the power to retain outside counsel, director search and recruitment consultants or other experts and will receive from the Company adequate funding, as determined by the Nominating and Corporate Governance Committee, for payment of reasonable compensation to such advisors.

Having evaluated the Board candidates set forth below under Proposal No. 1 pursuant to these processes and criteria, the Nominating and Corporate Governance Committee recommended, and the Board determined to nominate, each of the persons named below for election.

Stockholder Recommendations. The Nominating and Corporate Governance Committee will consider director candidates suggested by the Company’s stockholders provided that the recommendations are made in accordance with the same procedures required under the By-Laws for nomination of directors by stockholders. For instance, stockholder nominations must comply with the notice provisions described under “Stockholder Proposals for the 2024 Annual Meeting” below. Stockholder nominations that comply with these procedures and that meet the criteria outlined therein will receive the same consideration that the Nominating and Corporate Governance Committee’s nominees receive. The Company will report any material change to this procedure in an appropriate filing with the SEC and will make any such changes available promptly on the “SEC Filings” section of the Company’s website at www.seacormarine.com.

Communications with the Board or Independent Directors

Stockholders or interested parties who wish to communicate with the Board, the Non-Executive Chairman and/or independent directors, may do so by writing in care of the Company’s Corporate Secretary, indicating by title or name to whom correspondence should be directed. Correspondence should be sent to: SEACOR Marine Holdings Inc., Attn: Corporate Secretary, 12121 Wickchester Lane, Suite 500, Houston, Texas 77079. The independent directors have established procedures for handling communications from stockholders of the Company and directed the Corporate Secretary to act as their agent in processing any communications received. All communications that relate to matters that are within the scope of the responsibilities of the Board and its committees will be forwarded to the Non-Executive Chairman and independent directors. Communications that relate to matters that are within the responsibility of one of the Board committees will be forwarded to the chairperson of the appropriate committee. Communications that relate to ordinary business matters that are not within the scope of the Board’s responsibilities will be sent to the appropriate executive. Solicitations, junk mail and obviously frivolous or inappropriate communications will not be forwarded, but will be made available to any director who wishes to review them.

The Audit Committee has established procedures for (i) the receipt, retention, and treatment of complaints, reports and concerns regarding accounting, internal accounting controls, or auditing matters and (ii) the confidential, anonymous submission of complaints, reports and concerns by employees regarding questionable accounting or auditing matters. These procedures are available on the Company’s website, at www.seacormarine.com by navigating to “Investors,” and clicking “Corporate Governance” (entitled “Procedures for Addressing Complaints”). Such complaints, reports or concerns may be communicated to the Company’s General Counsel or the Chairman of the Audit Committee through a toll-free hotline at +1 (844) 359-7729 or through an internet based reporting tool

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provided by NAVEX Global (www.seacormarine.ethicspoint.com), each of which ensures that the communications are made on an anonymous and confidential basis. Complaints received are logged by the General Counsel, communicated to the Chairman of the Audit Committee and then investigated by the General Counsel under the supervision of the Audit Committee, unless the Audit Committee determines a different approach is required. These procedures permit the retention of counsel, accountants and consultants to help with such investigations. In accordance with Section 806 of the Sarbanes-Oxley Act of 2002, as amended (the “Sarbanes-Oxley Act”), these procedures prohibit the Company from retaliating against any person who, in good faith, submits an accounting or auditing complaint, report or concern or provides assistance in the investigation or resolution of such matters.

Risk Oversight

The Company’s business, financial condition, results of operations, cash flows and prospects can be adversely affected by risk. The management of risk is central to the success of the Company and requires the involvement of the Board, officers, employees, and internal and independent auditors, all of whom are entrusted to develop a balanced and prudent approach to risk.

The Company has developed and implemented operational controls designed to identify and mitigate risk associated with its financial decisions, operations, legal compliance, business development, changing business conditions, cybersecurity and information technology systems. The Chief Executive Officer, with the assistance of the Chief Financial Officer, Chief Accounting Officer, General Counsel, Executive Vice Presidents, Senior Vice Presidents, other key officers and external legal counsel, is responsible for, among other risk management measures:

The Board has reviewed and evaluated, and expects to routinely review and evaluate, the Company’s risk profile to ensure that the measures implemented by the Company are adequate to execute and implement the Company’s strategic objectives. Issues related to risk are regularly discussed by the Chief Executive Officer and the rest of the senior management team with members of the Board both through informal communications, such as e-mail, telephone conference and in-person meetings, and during formal Board meetings. Senior management makes formal presentations to the Board regarding risk management issues at least once per year. Our Non-Executive Chairman and certain other Board members are intimately familiar with the risks associated with the types of assets managed and owned by the Company and routinely engage in dialogue with the Chief Executive Officer and appropriate members of senior management regarding such risks. In addition, when the Board reviews particular transactions and initiatives that require Board approval, or that otherwise merit Board involvement, the Board generally includes related risk analysis and mitigation plans among the matters addressed with management. The Board also oversees cybersecurity risks. See “Cybersecurity Risk Management” below for additional information regarding the Company’s cybersecurity risk management program.

The Audit Committee, together with senior management, works to respond to recommendations from internal and external auditors and supervisory authorities regarding the Company’s compliance with internal controls and disclosure controls and procedures, and other factors that could interfere with the Company’s reporting obligations, as well as the successful implementation of the Company’s strategic plan. The Audit Committee also reviews the adequacy of the Company’s risk management policies and procedures and meets privately with Company employees and the General Counsel to consider recommendations regarding policies related to risk management. In addition, senior management works closely with the General Counsel to facilitate compliance with foreign and domestic laws and regulations. The General Counsel also reports to the Board on Company programs and initiatives that educate employees on these laws, regulations and any updates thereto, and facilitates the Company’s compliance therewith.

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The Compensation Committee oversees the Company’s compensation programs and oversees and evaluates risks relating to its compensation programs and human capital management more generally. The General Counsel keeps the Compensation Committee updated on matters relating to retention of key employees, employee satisfaction, team member diversity and related matters.

The Nominating and Corporate Governance Committee oversees the Company’s ESG program and sustainability initiatives, including the Company’s Sustainability Council. See “ESG and Sustainability Council” below for additional information regarding the Company’s sustainability initiatives, including the publication of the Sustainability Council’s Inaugural Sustainability Report.

The Board believes that senior management’s significant involvement in risk management and mitigation, combined with Board, Audit Committee and Nominating and Corporate Governance Committee oversight, enables the Company to properly and comprehensively assess risk from both an enterprise-wide and divisional perspective, thereby managing and observing the most substantive risks at each level within the Company.

Cybersecurity Risk Management

Senior management meets periodically with our Board to assess cybersecurity risks and to evaluate the status of our cybersecurity efforts. These efforts are led by our director of technology, who reports directly to our Chief Financial Officer. To address cyber risks, the Company maintains a global set of security policies and standards and regularly evaluates response readiness, disaster recovery or business continuity considerations. In addition, all employees receive annual cybersecurity and phishing training. Our cybersecurity team also consults with industry peers and engages third parties as needed to assess areas of risk as well as the overall maturity of our cybersecurity program.

Corporate Governance Guidelines and Code of Business Conduct and Ethics

The Board has adopted a set of Corporate Governance Guidelines, a Code of Business Conduct and Ethics and a Supplemental Code of Ethics. A copy of each of these documents, along with the charters of each of the committees described above, is available on the Company’s website at www.seacormarine.com by navigating to “Investors,” and clicking “Corporate Governance,” and is also available to stockholders in print without charge upon written request to the Company’s Investor Relations Department, 12121 Wickchester Lane, Suite 500, Houston, Texas 77079.

The Corporate Governance Guidelines address areas such as director responsibilities and qualifications, director compensation, management succession, board committees and annual self-evaluation. The Code of Business Conduct and Ethics is applicable to the Company’s directors, officers and employees and the Supplemental Code of Ethics is applicable to the Company’s Chairman, the Company’s Chief Executive Officer, the Chief Financial Officer and other senior financial officers. The Company will disclose future amendments to, or waivers from, certain provisions of the Supplemental Code of Ethics on its website within two business days following the date of such amendment or waiver.

ESG and Sustainability Council

The Company’s ESG program and sustainability initiatives are overseen by its Sustainability Council, which was formed in September, 2020. The Sustainability Council is an internal committee that reports to the Nominating and Corporate Governance Committee and includes senior executives, operational heads, and safety and health, compliance, and human resources professionals, all led by the Company’s Chief Executive Officer. The Sustainability Council collaborates and drives initiatives on all matters related to sustainability, as well as environmental, social and governance practices, including, but not limited to environmental protection, clean energy technology, social responsibility, stakeholder engagement, health and safety, and community empowerment. Together with the Nominating and Corporate Governance Committee, the Sustainability Council helps establish ESG and sustainability goals and integrate them into strategic and tactical business activities across the Company to contribute to risk management and long-term value for all stakeholders.

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On December 13, 2021, the Sustainability Council published its Inaugural Sustainability Report documenting the Company’s recent achievements in three areas: commitment to employees, environmental impact, and responsibility as a global citizen. The Company is aligning its operations with the following principles and ESG frameworks: the United Nations Sustainable Development Goals, the Paris Agreement, the Sustainable Accounting Standards Board (Oil & Gas – Services Standard metrics), the Task Force on Climate-Related Financial Disclosures, the Global Reporting Initiative, and the United Nations Global Compact – Sustainable Ocean Principles.

Environmental Sustainability: We recognize and are preparing for the dual challenges of the energy transition and climate change. Our Company is continually adapting its business to adjust to the changing landscape and has increased its focus on reducing fuel consumption and carbon emissions, supporting alternative energy sources and using new technologies to increase the sustainability of our operations and reduce environmental impacts. We are leveraging technology to move the sector forward towards more environmentally friendly processes, leaning into hybrid power solutions and other technologies. We are a pioneer in the use of hybrid power technology, a solution that reduces fuel consumption and emissions by up to 20%, and as of December 31, 2022 we have equipped six of our twenty-one owned platform supply vessels (“PSVs”) with hybrid battery power systems, and anticipate equipping one additional PSV with a hybrid battery power system in 2023. We own and operate the only hybrid well stimulation vessel in operation in the world, which reflects our continued commitment to investment in green technology solutions. As an industry leader, we are committed to complying with the International Maritime Organization (“IMO”) 2020 Sulphur cap and lowering emissions overall, and we are encouraged by the IMO 2030 targets. We continue to evaluate and improve our operational efficiencies across our organization to abide by the IMO 2020 Sulphur cap, and we are working towards IMO’s target of cutting carbon dioxide (CO₂) emissions by at least 50% by 2050, compared to 2008 levels, with carbon intensity reduced 40% by 2030. We are also ensuring 100% compliance with emissions-related regulatory demands, and we are reducing the emissions intensity of air pollutants like nitrogen oxides and sulphur oxides generated by our fleet to work towards IMO goals of at least a 50% reduction by 2050.

We are also committed to improving ocean health through pollution prevention and ballast water management, and are reducing the amount of waste produced by our operations to minimize our environmental impact. Our vessels are in full compliance with all laws and regulations with respect to oil spill prevention, and are fully compliant with the current IMO Ballast Water Management Convention (“IMO BWM Convention”). Since 2020, we have been focused on, and continue to explore, initiatives to reduce waste both in our shoreside operations and on board our vessels, including initiatives on reducing water consumption, plastic waste, lubricant waste, cleaning product waste, office and paper waste, food waste and vessel recycling. The initiatives span our entire business.

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PROPOSAL NO. 1 ELECTION OF DIRECTORS

The Board has nominated the people listed below for election as directors, each to serve until the next annual meeting of stockholders or until his or her successor is duly elected and qualified. Although not anticipated, if any of the nominees becomes unavailable for any reason, the Board in its discretion may designate a substitute nominee. If a stockholder has filled out the accompanying proxy card, that stockholder’s vote will be cast for the substitute nominee.

The following table sets forth information with respect to each nominee for election as a director as of the date of this Proxy Statement:

Standing Director Nominees

Andrew R. Morse has been a member of the Board since his appointment in May 2017 and has served as Non-Executive Chairman of the Board since June 2021. Mr. Morse served on the SEACOR Holdings board of directors from June 1998 to May 2017. Mr. Morse has been a managing director and senior portfolio manager of Morse, Towey and White, a wealth management unit of High Tower Advisors Inc., a Chicago-based firm of investment advisors since July 31, 2010. In addition, Mr. Morse served on the board of directors and on the audit committee of High Tower Advisors Inc. from July 31, 2010, until January 2018. Mr. Morse was a managing director and senior portfolio manager of UBS Financial Services, Inc., from October 2001 until July 2010. Mr. Morse was senior vice president-investments of Salomon Smith Barney Inc. of New York, an investment banking firm, and Smith Barney Inc., its predecessor, from March 1993 to October 2001. Mr. Morse sits on numerous philanthropic boards and is treasurer of the American Committee of the Weizmann Institute of Science. Mr. Morse served as a director of Seabulk International, Inc., both before and following its merger with SEACOR Holdings in July 2005 until March 2006. In December 2015, Mr. Morse became a member of the board of managers of KGP Realty, a private residential property management company.

We believe that Mr. Morse’s deep experience in wealth management and corporate finance provides a valuable resource to the Board, the Audit Committee, the Compensation Committee and the Nominating and Corporate Governance Committee. Mr. Morse’s finance experience through advising high net worth individuals and investment entities adds a valuable perspective to the Board. In addition, foreign governments have sought his experience on international corporate finance with respect to issues such as complex energy crisis management and other significant matters of public policy related to our business.

John Gellert has served as the Company’s President and Chief Executive Officer and as a member of the Board since June 1, 2017. Prior to the spin-off of the Company from SEACOR Holdings on June 1, 2017 (the “Spin-off”), Mr. Gellert served as the co-chief operating officer of SEACOR Holdings since February 23, 2015, and president of SEACOR Holdings’ Offshore Marine Services segment since July 2005. Mr. Gellert also held various financial, analytical, chartering and marketing roles with SEACOR Holdings since June 1992. Mr. Gellert is an officer and director of certain Company subsidiaries. Mr. Gellert serves as president and a member of the executive committee of International Support Vessel Owners Association, a

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member of the board of directors of Offshore Marine Service Association, an ex-officio member of the executive committee of National Ocean Industries Association, and a member of executive council at Cohesive Capital Management, L.P. Mr. Gellert graduated from Harvard College.

We believe that as the Company’s Chief Executive Officer, Mr. Gellert provides valuable insight to the Board on the Company’s day-to-day operations. In addition, Mr. Gellert’s long tenure with the Company allows him to provide valuable insight to the Board about the competitive dynamics of our industry.

R. Christopher Regan has been a member of the Board since his appointment in May 2017. Mr. Regan served on the SEACOR Holdings board of directors from September 7, 2005 to May 2017. Mr. Regan is co-founder and, since March 2002, managing director, of The Chartis Group, a management consultancy group offering strategic, operational, risk management, governance and compliance advice to U.S. healthcare providers, suppliers and payers. Prior to co-founding The Chartis Group in 2001, Mr. Regan served from March 2001 to December 2001 as president of H-Works, a healthcare management consulting firm and a division of The Advisory Board Company. From January 2000 through December 2000, Mr. Regan served as senior vice president of Channelpoint, Inc., a healthcare information services company. Mr. Regan also serves as a trustee of Hamilton College.

We believe that Mr. Regan’s experience providing advice regarding business valuations, risk management, financial governance and compliance adds to the Board’s breadth of experience. This knowledge also provides significant value to the Audit Committee, the Compensation Committee and the Nominating and Corporate Governance Committee.

Julie Persily has been a member of the Board since April 27, 2018. Since 2013, Ms. Persily has served on the board of directors of Investcorp Credit Management BDC, Inc., a NASDAQ listed business development company that invests in middle market companies, as a member of its audit and nominating committees and as chair of its compensation and valuation committees. Since 2017, Ms. Persily has served on the board of directors of Runway Growth Finance Corp., a NASDAQ listed business development company that provides secured loans to early-stage growth and venture-backed companies in the U.S., and as a member of its audit and nominating and corporate governance committees and chair of its compensation committee. Ms. Persily has a deep breadth of experience in the finance and capital market industries, having held various roles at Citigroup for nearly 10 years, including serving as the co-head of Citigroup’s leveraged finance group for over two years and head of acquisition finance prior thereto. Ms. Persily also formerly served as co-head of Leveraged Finance and Capital Markets at Nomura Securities. Ms. Persily holds a BA in Economics and Psychology from Columbia College and an MBA in Finance and Accounting from Columbia Business School.

We believe Ms. Persily’s experience and relationships in the financial sector, as well as her knowledge and understanding of corporate governance matters, adds to the Board’s deep bench of experience, and serves as an asset to the Audit Committee, the Compensation Committee and the Nominating and Corporate Governance Committee.

Alfredo Miguel Bejos has been a member of the Board since June 11, 2019. Mr. Miguel has been president and chief executive officer of Proyectos Globales de Energía y Servicios CME, S.A. de C.V. (“CME”) since 2012 and executive president of Helicópteros Bell de México, S. de R.L. de C.V. since 2009. Mr. Miguel has extensive finance experience having held various positions in the finance area of Banco Santander Mexico from 2000 until 2002. Mr. Miguel has served as an independent member of several boards of directors, including current memberships on the boards of the airline Volaris and Pure Leasing, positions which he has held since 2006. Mr. Miguel is also a member of the Customer Advisory Panel at Bell Helicopter, a leading company in helicopter manufacturing. Mr. Miguel holds a BA from Universidad Iberoamericana.

We believe that Mr. Miguel’s industry experience, specifically his extensive experience in the maritime aspects of the international energy and infrastructure sector, as well as his broad knowledge gained from serving on multiple boards of directors in the transportation industry will add a diverse perspective to the Board.

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Voting

Directors will be elected by a plurality of the votes cast virtually or by proxy at the Annual Meeting. If you do not wish your shares to be voted for any particular nominee, please identify any nominee for whom you “withhold authority” to vote on the enclosed proxy card.

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SECURITY OWNERSHIP OF CERTAIN BENEFICIAL OWNERS

The following table sets forth information regarding beneficial ownership of the Company’s Common Stock by all persons (including any “group” as that term is defined in Section 13(d)(3) of the Exchange Act) who were known by the Company to be the beneficial owners of more than 5.0% of the outstanding Common Stock as of April 3, 2023, other than the Company’s executive officers and directors. As of April 3, 2023, 27,096,812 shares of the Common Stock were issued and outstanding.

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SECURITY OWNERSHIP OF MANAGEMENT AND DIRECTORS

The following table sets forth information regarding beneficial ownership of our Common Stock by: (i) each current director of the Company; (ii) each named executive officer of the Company (referred to as a “Named Executive Officer” or “NEO” throughout this Proxy Statement); and (iii) all current directors and executive officers of the Company as a group. Except where otherwise indicated in the footnotes to the table, all beneficial ownership information set forth below is as of April 3, 2023. As of April 3, 2023, 27,096,812 shares of Common Stock were issued and outstanding.

* Represents less than 1.0%

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COMPENSATION OF DIRECTORS

The Compensation Committee, in consultation with the Nominating and Corporate Governance Committee, when appropriate, evaluates the status of Board compensation in relation to comparable U.S. companies (in terms of size, business sector, etc.) and reports findings and recommendations to the Board, including recommendations for approval of changes to compensation. Directors who are also employees of the Company receive no remuneration by reason of such directorship and are not compensated for attending meetings of the Board or standing committees thereof.

Non-employee directors are paid an annual cash retainer of $75,000 and such directors are also eligible to participate in the SEACOR Marine Holdings Inc. 2022 Equity Incentive Plan (the “2022 Plan”) that is administered by the Compensation Committee. Upon the recommendation of the Compensation Committee, beginning in June of 2022, the Board made adjustments to non-employee director compensation to increase the annual cash retainer from $50,000 to $75,000, and all equity grants made to non-employee directors in 2022 were comprised of grants of restricted shares of Common Stock subject to a 1-year vesting period. In 2021 and other prior years, non-employee directors received a portion of their annual equity grants in the form of immediately vested unrestricted shares of Common Stock.

Historically, annual equity awards are granted to non-employee directors in June of each year. To account for the significant volatility in the Company’s stock price, particularly during 2020, 2021 and 2022, in a way that was equitable to both directors and stockholders alike, for purposes of calculating the number of restricted shares of Common Stock granted to the non-employee directors, the Compensation Committee determined it was appropriate to use a trailing 60-day volume weighted average closing price (“VWAP”) of the Company’s stock price for purposes of calculating the number of restricted stock awards to be granted. A trailing 60-day VWAP of the Company’s stock price was also used for the purpose of calculating the number of restricted shares granted to NEOs in March 2022. Because the Company’s closing stock price on the grant date had increased above the trailing 60-day VWAP of the Company’s stock price used for purposes of the calculation of restricted stock awards to non-employee directors, the number of restricted shares of Common Stock granted to the non-employee directors in respect of their 2022 annual equity grant ended up being higher than it would have been had the closing price on the grant date been used. Use of a trailing 60-day VWAP is intended to smooth out volatility. understanding that, for any given year, the calculation of the number of restricted stock awards may be higher or lower than it would have been had the closing price on the grant date been used.

On June 9, 2022, upon the recommendation of the Compensation Committee, including with respect to the methodology described above for the calculation of the number of equity awards granted, the Board granted each non-employee director an annual equity award with a grant date fair value of $96,332, comprised of 10,885 restricted shares of Common Stock. As Non-Executive Chairman, Mr. Morse was granted an annual equity award with a grant date fair value of $43,604, comprised of 4,927 restricted shares of Common Stock. In addition, the Board determined that each non-employee director serving on a committee of the Board be compensated for such service as follows: (i) each committee member of the Audit Committee was granted an annual equity award with a grant date fair value of $10,903, comprised of 1,232 restricted shares of Common Stock (with the exception of Mr. Morse, who was granted an annual equity award with a grant date fair value of $21,806, comprised of 2,464 restricted shares of Common Stock as the chairperson of the Audit Committee), (ii) each committee member of the Compensation Committee was granted an annual equity award with a grant date fair value of $10,903, comprised of 1,232 restricted shares of Common Stock (with the exception of Mr. Regan, who was granted an annual equity award with a grant date fair value of $21,806, comprised of 2,464 restricted shares of Common Stock as the chairperson of the Compensation Committee) and (iii) each committee member of the Nominating and Corporate Governance Committee was granted an annual equity award with a grant date fair value of $5,452, comprised of unrestricted 616 shares of Common Stock (with the exception of Mr. Regan, who was granted an annual equity award with a grant date fair value of $10,903, comprised of 1,232 restricted shares of Common Stock as the chairperson of the Nominating and Corporate Governance Committee). The restricted shares of Common Stock vest after one year.

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NON-EMPLOYEE DIRECTOR COMPENSATION TABLE

The following table shows the compensation of the Company’s non-employee directors for the year ended December 31, 2022. Mr. Gellert does not receive any compensation for his service on the Board.

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EXECUTIVE COMPENSATION

Currently, the Company is a “smaller reporting company” under applicable rules and regulations of the SEC and as such, is exempt from certain executive compensation disclosures otherwise required by Item 402 of Regulation S-K (including the disclosure required to be provided pursuant to a “Compensation, Discussion & Analysis”). In accordance with these rules and regulations, we are providing certain information related to the Company’s 2022 compensation decisions that should be read in conjunction with the compensation tables provided later in this Proxy Statement. This discussion and the compensation tables that follow set forth the compensation of the following “Named Executive Officers” or “NEOs” of the Company:

Compensation Actions in Connection with the Spin-off

In connection with the Spin-off, the compensation committee of SEACOR Holdings took certain actions during 2017 to appropriately address the impact of the Spin-off on SEACOR Holdings’ outstanding equity awards. In general, outstanding stock options to acquire shares of SEACOR Holdings’ Common Stock were adjusted to preserve the aggregate intrinsic value of such stock options pre- and post-Spin-off. In addition, the compensation committee of SEACOR Holdings approved the vesting of SEACOR stock options and SEACOR restricted stock awards held by employees of the Company and individuals who joined the Company following the Spin-off. Other than Messrs. Everett and Rossmiller, who were not employees at the time, each of the Named Executive Officers received 1.007 restricted shares of the Company’s Common Stock for every restricted share of SEACOR Holdings’ Common Stock held as of the record date for the Spin-off.

Summary of 2022 Compensation Elements

Following the Spin-off, the Company’s Compensation Committee took certain actions and made certain compensation-related decisions that were based on the compensation philosophies and arrangements in place at SEACOR Holdings that the Compensation Committee felt were also appropriate for the Company’s executive officers. For example, the Board adopted the 2017 Equity Incentive Plan (the “2017 Plan”) for the purpose of granting equity-based compensation awards. The Board has since adopted the 2020 Plan and 2022 Plan, each subject to the approval of the Company’s stockholders. The 2020 Plan was approved by the Company’s stockholders at the 2020 annual meeting of stockholders and the 2022 Plan was approved by the Company’s stockholders at the 2022 annual meeting of stockholders. The 2017 Plan, the 2020 Plan and the 2022 Plan are collectively referred to herein as the “SEACOR Marine Equity Incentive Plans.” The Compensation Committee also implemented the following executive compensation practices:

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Executive Compensation Philosophy and Objectives

The Compensation Committee’s compensation philosophy is that subjective consideration of the different elements of performance is necessary to provide the flexibility to make appropriate compensation decisions without solely relying on the use of formulas or benchmarking. Consequently, the Compensation Committee believes it is in the Company’s best interest to conduct its own research regarding executive compensation, which includes a review of executive compensation at companies with similar business lines to that of the Company and a review of compensation at other entities that compete with the Company to employ executives with skills and specialties similar to those possessed by the Company’s executives.

Market Information

The Compensation Committee reviews reports on executive compensation trends issued by respected publications, and compiles compensation information through Equilar, proxy statements, compensation-related public disclosures, industry trade journals and other sources. The companies with similar lines of operating business considered in connection with the Compensation Committee’s compensation analysis include Archrock, Inc., Bristow Group Inc., Dril-Quip, Inc., Forum Energy Technologies, Inc., Gulf Island Fabrication, Inc., Helix Energy Solutions Group, Inc., Newpark Resources, Inc., Oil States International, Inc., RPC, Inc., TETRA Technologies, Inc. and Tidewater Inc. The Compensation Committee does not target any particular percentile or comparative level of compensation for executive officers. It does, however, assess the general competitiveness of proposed compensation levels in relation to the compensation paid by peer companies.

Independent Compensation Consultant

Pursuant to its charter, the Compensation Committee is authorized to retain and terminate any compensation consultant, as well as any independent legal, financial or other advisors, as it deems necessary. For fiscal year 2022, the Compensation Committee elected to continue to retain Lyons Benenson as its independent compensation consultant. Lyons Benenson has acted as an independent compensation consultant to the Compensation Committee since 2017 and has assisted the Compensation Committee by providing research and analyses related to peer company data and related market practices as they pertain to executive compensation.

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Prior to the retention of Lyons Benenson, the Compensation Committee evaluated Lyons Benenson’s independence from management, taking into consideration all relevant factors, including the six independence factors specified in the NYSE listing rules and applicable SEC requirements. The Compensation Committee concluded that Lyons Benenson is independent and that its work for the Compensation Committee does not raise any conflicts of interest.

Elements of 2022 Compensation

Annual Base Salary

The annual base salaries paid to the Named Executive Officers reflect the experience and skill required for executing the Company’s business strategy and overseeing its day-to-day operations. During 2021 the Compensation Committee, in consultation with Lyons Benenson, the Compensation Committee’s independent compensation consultant, conducted a review of the current cash compensation of the executives. In connection with such review, effective January 1, 2022, the Compensation Committee approved the increase of the base salaries of each of Messrs. Gellert, Llorca, Everett and Rossmiller to $600,000, $375,000, $325,000 and $325,000, respectively. There were no other changes to bases salaries of the Named Executive Officers during 2022.

Annual Bonus

The Compensation Committee continues to review the compensation practices employed by comparable companies in order to assist it in enhancing the design of an annual bonus program. Given the continued volatility in the Company’s stock price as well as commodity prices supporting the Company’s business, it was not realistic for the Compensation Committee to meaningfully design a formulaic annual bonus program for 2022. Following the end of 2022, the Compensation Committee determined that it was appropriate to award cash bonuses to the Named Executive Officers in respect of 2022 performance, after taking into consideration the following factors: (i) the individual contributions of the Named Executive Officers during 2022, including with respect to strategic initiatives, and (ii) the need to retain the Named Executive Officers given their collective industry knowledge and historical knowledge of the Company generally. After taking these factors into account, in early 2023 the Compensation Committee approved the payment of cash bonuses as follows: $600,000, $500,000, $400,000 and $350,000 for each of Mr. Gellert, Mr. Llorca, Mr. Everett and Mr. Rossmiller, respectively. 60% of such cash bonuses was paid in April 2023, and 20% of such cash bonuses will be paid in the first quarter of 2024 and 2025, respectively, subject in each case to the continued employment of the Named Executive Officer. In the event that an NEO’s employment is terminated without “cause” or an NEO resigns for “good reason” or upon the occurrence of a “change in control” (as such terms are defined in the applicable NEO’s employment agreement), then any unpaid portion of the 2022 annual cash bonus will be paid out in connection with such event.

Long-term Incentives

The SEACOR Marine Equity Incentive Plans authorize the Compensation Committee to provide equity-based or other incentive-based compensation for the purpose of attracting and retaining the Company and its affiliates’ directors, employees and certain consultants, and providing those directors, employees and consultants with incentive opportunities and rewards for superior performance. The types of awards under the SEACOR Marine Equity Incentive Plans may include stock options, stock appreciation rights, restricted stock and restricted stock units, performance awards and other stock-based awards.

The Compensation Committee established an equity-based compensation program for the Company in order to align the interests of senior employees with the Company’s long-term growth. In general, equity grants are made on dates previously established by the Compensation Committee and the Company does not time the release of non-public information for the purpose of affecting the value of equity awards.

In March 2022, the Compensation Committee approved restricted stock and PRSU awards to the Named Executive Officers. The Compensation Committee introduced PRSUs to its long-term equity program

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in 2019 in order to better align the Named Executive Officers’ interests with the Company’s stock price by tying the vesting of such awards directly to stock price appreciation, and the Compensation Committee continued this practice in 2022.

The restricted stock awards vest ratably over three years beginning on March 4, 2023, subject to continued employment on each applicable vesting date, subject to exceptions for certain involuntary terminations. The PRSUs consist of five equal tranches, each of which will be earned if and when the closing price of one share of Common Stock equals or exceeds the specified stock price performance goal for such tranche for 60 consecutive trading days during the three-year performance period beginning on the grant date, provided that any earned PRSUs will not vest and be settled until the third anniversary of the grant date. In order for earned PRSUs to vest and be settled, the executive must remain employed by the Company on the third anniversary of the grant date, subject to exceptions for certain involuntary termination events that occur prior to the vesting date. The specified stock price performance goals for each tranche are $5.02, $5.72, $6.45, $7.19 and $7.88, respectively. The Compensation Committee did not approve any other equity awards to the Named Executive Officers during 2022.

Pursuant to the applicable award agreements, the restricted stock and PRSU awards vest subject to the executive’s continued employment with the Company on the applicable vesting date, subject to accelerated vesting upon the executive’s death or qualified retirement or upon termination by the Company without “cause” (including for disability). Upon any such acceleration event, PRSUs that have been earned with respect to the stock price goal(s) will be settled on the third anniversary of the grant date, without regard to the executive’s employment with the Company as of such date.

The grant date fair value of the restricted stock and PRSU awards granted to each Named Executive Officer in 2022 is set forth in the table below:

In determining the applicable target value of restricted stock and PRSU awards, the Compensation Committee considered, among other factors, prior-year Company and individual performance, employee retention and incentives, and volatility in the Company’s stock price and the impact this volatility has on the tangible value of the NEOs’ equity awards. Given the significant volatility in the Company’s stock price in the months prior to the expected grant date of the 2022 awards, the Compensation Committee determined that it would be appropriate to use a 60-day volume weighted average closing price (“VWAP”) of the Company’s stock price for purposes of calculating the number of restricted stock and PRSU awards granted. On the day the March 2022 awards were granted, the closing price of our common stock was $5.88, and the 60-day VWAP was $4.33. Given the Compensation Committee had previously decided to use a 60-day VWAP, the Compensation Committee determined it would not be appropriate to change its methodology based on the increased price on the grant date, because the Compensation Committee’s intent when it determined to use a 60-day VWAP was to smooth out potential stock price volatility. The grant date fair values of the Restricted Shares and PRSUs reflect the fact that the number of awards granted was based on a lower stock price (therefore yielding a greater number of Restricted Shares and PRSUs than would have otherwise been granted had the closing stock price on the grant date been used), and this number of shares is then multiplied by the closing stock price on the grant date (or otherwise incorporated into the Monte Carlo simulation with respect to the PRSUs), in order to calculate the grant date fair value from a financial reporting perspective. However, it is important to note that the grant date fair values reported in this proxy statement do not necessarily correlate to the value realized by the NEOs, because the value ultimately realized from these awards will be based on (i) satisfaction of the underlying vesting conditions and (ii) the Company’s stock price when such awards vest.

On February 9, 2022, the PRSUs granted in 2019 were forfeited and terminated upon determination of the Compensation Committee that none of the stock price performance goals were capable of being

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satisfied for the required 60 consecutive trading days prior to the last day of the three-year performance period.

On February 8, 2023, the PRSUs granted in 2020 were forfeited and terminated upon determination of the Compensation Committee that none of the stock price performance goals were capable of being satisfied for the required 60 consecutive trading days prior to the last day of the three-year performance period.

Stock Ownership Guidelines

The Compensation Committee has adopted Stock Ownership Guidelines (the “Guidelines”) for executive officers at the Senior Vice President level or higher. Each executive officer subject to the Guidelines is expected to hold Company stock, including unvested restricted shares, with a value equal to a multiple of his or her annual base salary, as follows:

Neither unvested PRSUs nor options count toward satisfaction of the Guidelines. Officers subject to the Guidelines are expected to comply within five years from the date the individual is named to a participating position. As of March 1, 2023, all NEOs have met the stock ownership requirements.

Clawback Policy

The award agreements applicable to any stock options, restricted stock and PRSU awards granted to the Named Executive Officers in years 2017 through 2022 provide that the shares of Common Stock underlying such awards are subject to recoupment under any existing clawback policy or any clawback policy that the Company is required to adopt pursuant to the listing standards of any national securities exchange or association on which the Company’s securities are listed or as is otherwise required by the Dodd-Frank Wall Street Reform and Consumer Protection Act or other Applicable Laws. We intend to adopt a Clawback Policy, as will be required by the new NYSE rules, prior to the deadline set forth in the adopting release.

Policy Against Pledging and Hedging Company Securities

The Company has adopted policies restricting hedging and pledging of Company securities by our directors, senior officers and employees. The Board has designated Andrew H. Everett II, Senior Vice President, General Counsel and Secretary as the Company’s compliance officer (the “Compliance Officer”). The Compliance Officer, along with other members of the compliance committee designated by the Board (the “Compliance Committee”), will review and either approve or prohibit all proposed trades of Common Stock by directors and executive officers and trades by specified employees outside of trading windows in accordance with the Company’s Insider Trading and Tipping Procedures and Guidelines.

Certain forms of hedging or monetization transactions allow directors, executive officers, employees, and members of the households and dependents of such persons (“Covered Persons”) to continue to own covered securities, but without the full risks and rewards of ownership. When that occurs, Covered Persons may no longer have the same objectives as the Company’s other stockholders. Therefore, Covered Persons are prohibited from engaging in such transactions. Any person wishing to enter into such an arrangement must first pre-clear the proposed transaction with the Compliance Committee. Any request for pre-clearance of a hedging or similar arrangement must be submitted to the Compliance Officer at least two weeks prior to the proposed execution of documents evidencing the proposed transaction and must set forth a justification for the proposed transaction.

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Retirement Plans

The Company’s eligible U.S.-based employees may participate in the SEACOR Marine 401(k) Plan, a Company sponsored defined contribution plan (“SEACOR Marine 401(k) Plan”). From January 1, 2022 until June 30, 2022, the Company matched employee contributions to the SEACOR Marine 401(k) Plan in the amount of 100% of the first 1.0% of an employee’s salary that the employee contributed to the SEACOR Marine 401(k) Plan, and 50% of the next 4% of the employee’s salary that the employee contributed to the SEACOR Marine 401(k) Plan, for a total match of 3% of such employee’s salary. From and after July 1, 2022, the Company matched employee contributions to the SEACOR Marine 401(k) Plan in the amount of 100% of the first 2.0% of an employee’s salary that the employee contributed to the SEACOR Marine 401(k) Plan, and 50% of the next 4% of the employee’s salary that the employee contributed to the SEACOR Marine 401(k) Plan, for a total match of 4% of such employee’s salary.

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COMPENSATION TABLES

SUMMARY COMPENSATION TABLE

The following table sets forth certain compensation information for the Company’s Named Executive Officers in respect of the fiscal years ended December 31, 2022 and 2021:

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OUTSTANDING EQUITY AWARDS AT FISCAL YEAR-END (2022)

The following table sets forth certain information with respect to outstanding equity awards at December 31, 2022, held by the Named Executive Officers.

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EMPLOYMENT CONTRACTS/TERMINATION OF EMPLOYMENT/CHANGE OF CONTROL

In connection with a review of the Company’s executive compensation arrangements, the Compensation Committee approved executive employment agreements for each of Messrs. Gellert, Llorca, Everett and Rossmiller (the “Executive Employment Agreements”), which agreements were executed and became effective on November 5, 2019.

The Executive Employment Agreements set forth the then-current base salary of each of Messrs. Gellert, Llorca, Everett and Rossmiller, and provides that each of them will have a target annual bonus opportunity equal to 100% of the executive’s base salary as in effect from time to time. During 2022, the Compensation Committee, in consultation with Lyons Benenson, the Compensation Committee’s independent compensation consultant, conducted a review of the current cash compensation of the executives. In connection with such review, effective January 1, 2022, the Compensation Committee approved the increase of the base salaries of each of Messrs. Gellert, Llorca, Everett and Rossmiller to $600,000, $375,000, $325,000 and $325,000, respectively.

Upon a termination of employment by the Company without “Cause” or resignation by the executive for “Good Reason” (as such terms are defined in the Executive Employment Agreements) (each, a “Qualifying Termination”), each executive will be eligible to receive the following severance benefits: (i) a lump sum payment equal to a multiple of the executive’s base salary (2.0x for Mr. Gellert, 1.75x for Mr. Llorca and 1.5x for Messrs. Everett and Rossmiller); (ii) a lump sum amount equal to the average annual cash incentive bonus paid to the executive in respect of the last three calendar years prior to the year in which the executive’s termination of employment occurred (based solely on amounts paid in respect of 2019 and beyond); (iii) a pro-rated annual bonus payable in respect of the year in which the termination occurs, based on actual achievement of the applicable performance goals, and pro-rated based on the number of days the executive was employed by the Company during the calendar year in which the termination occurs; (iv) a lump sum cash payment based on the employer portion of the monthly cost of maintaining health benefits for the executive and his eligible dependents for a period of time following the executive’s termination of employment (24 months for Mr. Gellert, 21 months for Mr. Llorca and 18 months for Messrs. Everett and Rossmiller); and (v) immediate vesting of the unvested portion of certain equity awards, and an extended exercise period for the executive’s outstanding stock options.

If a Qualifying Termination occurs within two years following a “Change in Control” (as such term is defined in the Executive Employment Agreement), the executive will be eligible to receive the same benefits described above, except that the bonus amount described in subsection (ii) will be no less than the executive’s target annual bonus for the year in which the termination occurs.

The executives’ receipt of the severance benefits described above are subject to the executive’s execution and non-revocation of an effective release of claims. The Executive Employment Agreements also provide for certain non-competition, non-solicitation and non-disparagement provisions that apply following a termination of employment. These benefits are in addition to benefits available generally to salaried employees, such as distributions under the Company’s 401(k) savings plan, disability benefits and accrued vacation pay.

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POTENTIAL PAYMENTS UPON DEATH, DISABILITY, QUALIFIED RETIREMENT, TERMINATION WITHOUT CAUSE OR IN CONNECTION WITH A CHANGE OF CONTROL

The following table sets forth the potential payments and the acceleration of stock options, restricted stock and PRSUs upon the termination of employment of the employee, or the occurrence of a “change-in-control,” in each case, as of December 31, 2022.

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Equity Compensation Plan Information

The following table sets forth information regarding the Company’s equity compensation plans as of December 31, 2022.

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RELATED PARTY TRANSACTIONS

Related Party Transactions Policy

The Company has established a written policy for the review and approval or ratification of transactions with Related Parties (the “Related Party Transactions Policy”) to assist it in reviewing transactions that exceed the thresholds for disclosure established under Item 404(a) of Regulation S-K promulgated by the SEC (“Related Party Transactions”) involving the Company and its subsidiaries and Related Parties (as defined below). Examples include, among other things, sales, purchases or transfers of real or personal property, use of property or equipment by lease or otherwise, services received or furnished, borrowing or lending (including guarantees), and employment by the Company of an immediate family member of a Related Party or a change in the material terms or conditions of employment of such an individual.

The Related Party Transactions Policy supplements the Company’s other conflict of interest policies set forth in the Company’s Corporate Governance Guidelines, its Code of Business Conduct and Ethics and its other internal procedures. A summary description of the Related Party Transactions Policy is set forth below.

For purposes of the Related Party Transactions Policy, a “Related Party” includes the Company’s directors, director nominees and members of management since the beginning of the Company’s last fiscal year, beneficial owners of 5.0% or more of any class of the Company’s voting securities and members of their respective Immediate Family (as defined in the Related Party Transactions Policy), as well as the Company’s affiliates, investees, trusts for the benefit of employees and other parties with which the Company may deal if one party can control or significantly influence the management or operating policies of the Company.

The Related Party Transactions Policy provides that Related Party Transactions must be approved or ratified by Audit Committee. The Board has delegated to the Audit Committee the review and, when appropriate, approval or ratification of Related Party Transactions. Upon the presentation of a proposed Related Party Transaction, the Related Party is excused from participation and voting on the matter. In approving, ratifying or rejecting a Transaction, the Audit Committee will consider such information as it deems important to conclude if the transaction is fair and reasonable to the Company.

Whether a Related Party’s interest in a Related Party Transaction is material or not will depend on all facts and circumstances, including whether a reasonable investor would consider the Related Party’s interest in the Related Party Transaction important, together with all other available information, in deciding whether to buy, sell or hold the Company’s securities. In administering this policy, the Board or the relevant committee will be entitled (but not required) to rely upon such determinations of materiality by the Company’s management.

The following factors are taken into consideration in determining whether to approve or ratify a Related Party Transaction with a Related Party:

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The following arrangements will not generally give rise to Related Party Transactions with a Related Party for purposes of the Related Party Transactions Policy given their nature, size and/or degree of significance to the Company:

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CERTAIN RELATIONSHIPS AND RELATED TRANSACTIONS

Exchange Transaction with Carlyle

On October 5, 2022, the Company and certain funds affiliated with The Carlyle Group Inc. (the “Carlyle Investors”) entered into two agreements pursuant to which the Company issued the Carlyle Investors (i) $90.0 million in aggregate principal amount of the Company’s 8.0% / 9.5% Senior PIK Toggle Notes due 2026 (the “Guaranteed Notes”) and (ii) $35.0 million aggregate principal amount of the Company’s 4.25% Convertible Senior Notes due 2026 (the “New Convertible Notes”) in exchange for all $125.0 million in aggregate principal amount of the Company’s convertible senior notes due 2023 (the “Old Convertible Notes”) outstanding (the “Exchange Transaction”). The New Convertible Notes were issued pursuant to the Exchange Agreement (Convertible Notes) among the Company, as issuer, and the Carlyle Investors (the “Convertible Notes Exchange Agreement”).

Consistent with the requirements of the documents governing the Old Convertible Notes, the Convertible Notes Exchange Agreement requires the Company to use reasonable best efforts, subject to its directors’ fiduciary duties, to cause a person designated by Carlyle (if Carlyle so chooses) to be appointed as a director on the Board, if Carlyle, solely as a result of the conversion of the Convertible Notes for shares of our Common Stock, collectively owns or continues to own (or would own upon conversion), 10.0% or more of our outstanding shares of Common Stock on a fully diluted basis (the “Board Appointment Right”). The Board Appointment Right was previously contained in the note purchase agreement (“Note Purchase Agreement”) and the investment agreement (the “Investment Agreement”), by and between the Company and Carlyle in connection with the issuance of the Old Convertible Notes.

During 2017 and the beginning of 2018, Ferris Hussein served on the Board as the director designated by Carlyle until April 17, 2018, when he resigned. Since Mr. Hussein’s resignation from the Board, Carlyle has determined not to exercise its right to designate a director. Carlyle was also provided a right to appoint a board observer under certain circumstances. A representative of Carlyle observes meetings of the Board pursuant to Carlyle’s observer rights under the Convertible Notes Exchange Agreement. This observation right will terminate at the time Carlyle owns less than the lesser of (i) $50.0 million in aggregate principal amount of New Convertible Notes and Guaranteed Notes and (ii) New Convertible Notes and Guaranteed Notes and warrants representing 5.0% of the Common Stock outstanding on a fully diluted basis, assuming the conversion of all such New Convertible Notes held by Carlyle and the exercise of the warrants. Carlyle has exercised this observer right with respect to most board meetings during 2022 and we expect they will continue to do so as long as they maintain that right under the Convertible Notes Exchange Agreement.

During 2022, Carlyle did not exercise any warrants. During 2021 and 2020, Carlyle exercised 48,809 and 83,367 warrants, respectively. As of December 31, 2022, Carlyle had 1,439,483 outstanding warrants.

Transactions with CME.

Mr. Alfredo Miguel Bejos, a Director of the Company, currently serves as President and Chief Executive Officer of Proyectos Globales de Energía y Servicios CME, S.A. de C.V. (“CME”). In accordance with the Related Transaction Policy, the Audit Committee has adopted guidelines for addressing ongoing CME-related transactions.

Prior to the consummation of the Framework Agreement Transactions described below, the Company participated in a variety of joint ventures with CME, including Mantenimiento Express Maritimo, S.A.P.I. de C.V. (“MexMar”), Offshore Vessels Holding, S.A.P.I. de C.V. (“OVH”) and SEACOR Marlin LLC. The joint venture agreements for each of these joint ventures were negotiated at arms-length in the ordinary course of business. Each of MexMar, OVH and SEACOR Marlin LLC was a joint venture company that was 49% owned by a wholly-owned subsidiary of the Company and 51% owned by subsidiaries of CME.

On September 29, 2022, the Company and certain of its subsidiaries, on the one hand, and Operadora de Transportes Marítimos, S.A. de C.V. (“OTM”), CME Drillship Holdings DAC (“CME Ireland”), and OVH, on the other hand, entered into the Framework Agreement (the “Framework Agreement”). OTM and

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CME Ireland are affiliates of CME. Prior to the closing of the Framework Agreement Transactions, the Company owned 49% of each of MexMar and OVH through SEACOR Marine International LLC, a wholly-owned subsidiary of the Company (“SEACOR Marine International”), and the remaining 51% ownership interests were held by OTM. The Company also owned a minority interest in SEACOR Marlin LLC, the owner of the PSV SEACOR Marlin, and the remaining ownership interests of SEACOR Marlin were held by MexMar. The Framework Agreement provided for, among other things, (i) the sale by the Company of all of the outstanding equity interests of SEACOR Marine International to OTM for a purchase price of $66 million, (ii) the sale by the Company of the SEACOR DAVIS anchor handling towing supply vessel to CME Ireland in exchange for the remaining equity interests in SEACOR Marlin LLC, such that SEACOR Marlin LLC would become a wholly-owned subsidiary of the Company, (iii) the transfer of a hybrid battery system from OVH to the Company as repayment in full of a certain vessel loan agreement by the Company to its former joint venture, and (iv) entry into a bareboat charter agreement between SEACOR Marlin LLC and MexMar (collectively, the “Framework Agreement Transactions”). Each of the Framework Agreement Transactions was consummated on September 29, 2022. As a result of the Framework Agreement Transactions, the Company no longer owns any equity interest in either of MexMar or OVH, and the Company owns all of the equity interests in SEACOR Marlin LLC, which owns the PSV SEACOR Marlin.

In connection with the closing of the Framework Agreement Transactions, on September 29, 2022, SEACOR Marine Capital Inc., a wholly-owned subsidiary of the Company (“SEACOR Marine Capital”) purchased all of the outstanding loans under the Second Amended and Restated Term Loan Credit Facility Agreement, made as of July 8, 2022, by and among MexMar, as the borrower, DNB Capital LLC and The Governor and Company of the Bank of Ireland, each as lenders, and DNB Bank ASA, New York Branch, as facility agent (as amended from time to time, the “MexMar Original Facility Agreement”) for an aggregate amount of $28.8 million, representing par value of the loan. The purchase was funded using proceeds received from the Framework Agreement Transactions. On the same date the facility was amended pursuant to a Third Amended and Restated Facility Agreement (“MexMar Third A&R Facility Agreement”) to, among other things, (i) provide for the prepayment by MexMar of approximately $8.8 million of the outstanding loan amount, to reduce the outstanding principal on the loan to $20.0 million, (ii) modify the definition of “Change of Control,” (iii) modify the maturity date from January 23, 2025 to September 30, 2023, (iv) decrease the minimum cash requirement from $10.0 million to $2.5 million, (v) modify the interest margin from 4.7% to 5.0% and (vi) modify the principal repayment profile to reflect four quarterly installments of $5.0 million to repay the loan by the maturity date. All collateral and security arrangements remain in place from the MexMar Original Facility Agreement, including a first priority mortgage on 13 offshore support vessels owned by MexMar. As a result, SEACOR Marine Capital is the sole lender to MexMar under the MexMar Third A&R Facility Agreement and expects that the loan will be repaid in full by September 30, 2023.

Each of the Framework Agreement Transactions and the transactions entered into in connection with the MexMar Third A&R Facility Agreement (the “MexMar Facility Agreement Transactions”) were subject to the oversight of, and received advance approval from, the Audit Committee as related party transactions subject to the Company’s Related Party Transaction Policy. Mr. Miguel recused himself from the Audit Committee and the Board deliberations with respect to the Framework Agreement Transactions and the Mexmar Facility Agreement Transactions. The Board received a third-party fairness opinion with respect to the Framework Agreement Transactions.

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PROPOSAL NO. 2 ADVISORY VOTE TO APPROVE NAMED EXECUTIVE OFFICER COMPENSATION (“SAY ON PAY”)

Pursuant to the Dodd-Frank Wall Street Reform and Consumer Protection Act of 2010 and Section 14A of the Exchange Act, we are providing our stockholders the opportunity to vote to approve, on an advisory, non-binding basis, the compensation of our Named Executive Officers, as disclosed in this Proxy Statement in accordance with the SEC’s rules. This proposal, which is commonly referred to as “Say on Pay,” gives stockholders the opportunity, on an advisory basis, to approve or vote against Named Executive Officer compensation, or abstain from voting with respect to such proposal.

Our executive compensation program is designed to enhance stockholder value by focusing on performance factors that align with our strategic objects; attract, motivate and retain highly-qualified executives committed to the Company’s long-term success; and provide competitive salaries relative to their peers. To that end, we provide a program of cash and equity-based awards to promote executive continuity, to align the interests of the Company’s executives with those of our stockholders and to reward executives for superior performance.

We urge stockholders to read the “Executive Compensation” section of this Proxy Statement beginning on page 23, which describes the Company’s executive compensation programs and the decisions made by the Compensation Committee and the Board with respect to the year ending December 31, 2022.

The Board is asking stockholders to approve the following advisory resolution at the Annual Meeting:

“RESOLVED, that the compensation paid to the Company’s Named Executive Officers, as disclosed pursuant to Item 402 of Regulation S-K in the Company’s Proxy Statement, including the Executive Compensation, compensation tables and narrative discussion contained therein, is hereby approved.”

Because the vote on this proposal is advisory in nature, it will not affect any compensation already paid or awarded to any Named Executive Officer and will not be binding on or overrule any decisions of the Company, the Board or the Compensation Committee; it will not create or imply any change to the fiduciary duties of, or create or imply any additional duties for, the Company, the Board or the Compensation Committee; and it will not restrict or limit the ability of stockholders to make proposals for inclusion in proxy materials related to executive compensation. Although non-binding, the Board and the Compensation Committee will review and consider the voting results in their entirety when making future decisions regarding our executive compensation program.

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PROPOSAL NO. 3: ADVISORY VOTE TO APPROVE THE FREQUENCY OF ADVISORY VOTES TO APPROVE NAMED EXECUTIVE OFFICER COMPENSATION (“SAY ON FREQUENCY”)

Section 14A of the Exchange Act requires us to submit a non-binding, advisory vote, commonly known as a “say-on-frequency” proposal, to stockholders at least once every six years to determine whether non-binding, advisory votes to approve the compensation of our Named Executive Officers, like Proposal 2 (a “Say on Pay” vote), should be held once every year, every other year or every three years. Unless the Board determines otherwise, the next say on frequency vote (following the Annual Meeting) will occur at the annual meeting of stockholders held in 2029. After careful consideration, the Board and the Compensation Committee have determined that holding a Say on Pay vote “every year” would be the most appropriate policy for the Company because it will allow stockholders to provide current input on our policies and practices for compensation of our Named Executive Officers as disclosed in our proxy statement each year. The Board and the Compensation Committee believe that holding a Say on Pay vote every year is consistent with our efforts to engage in an ongoing dialogue with our stockholders on executive compensation and corporate governance matters.

The advisory vote on the frequency of future advisory votes on executive compensation is advisory in nature, and therefore not binding on the Board or the Compensation Committee. We recognize that stockholders may have different views as to what is an appropriate frequency for advisory Say on Pay votes, and we look forward to hearing from our stockholders as to their preferences. The Board and the Compensation Committee will carefully consider the outcome of the vote; however, when considering the frequency of future Say on Pay votes, the Board may decide that it is in the Company’s best interests and in the best interests of our stockholders to hold Say on Pay votes more or less frequently than the frequency receiving the votes cast by our stockholders.

Stockholders may cast a vote, on an advisory basis, on the preferred frequency option by selecting the option of every year, every other year, every three years or abstaining from the vote, when voting in response to the resolution set forth below. Stockholders are not voting to approve or disapprove the Board’s recommendation.

The Board is asking stockholders to approve the following advisory resolution at the Annual Meeting:

“RESOLVED, that the stockholders determine, on an advisory basis, whether the preferred frequency of an advisory vote to approve the compensation of the Company’s Named Executive Officers as disclosed in the Company’s Proxy Statement should be held every year, every other year, or every three years.”

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PROPOSAL NO. 4: RATIFICATION OF APPOINTMENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM

The Board recommends that stockholders ratify the appointment of Grant Thornton LLP (“Grant Thornton”), independent registered public accounting firm to audit the accounts of the Company and its subsidiaries for the fiscal year ending December 31, 2023. The appointment of Grant Thornton was recommended to the Board by its Audit Committee.

Grant Thornton has been the Company’s independent registered public accounting firm since June 12, 2017, and the Audit Committee believes that the continued retention of Grant Thornton as the Company’s independent registered public accounting firm is in the best interest of the Company and its stockholders.

Representatives of Grant Thornton will be virtually present at the Annual Meeting. They will have an opportunity to make a statement if they desire to do so and will be available to respond to stockholder questions after the conclusion of the Annual Meeting.

The affirmative vote of the holders of a majority in voting power of the Common Stock represented virtually or by proxy and entitled to vote at the Annual Meeting is required to ratify the appointment of Grant Thornton.

Independent Registered Public Accounting Firm Fee Information

Fees for professional services provided by Grant Thornton LLP for the years ended December 31 were as follows:

Audit Fees represent fees for professional services provided in connection with the audit of the Company’s financial statements, review of the Company’s quarterly financial statements, and services provided in connection with other statutory or regulatory filings. Audit-Related Fees represent fees for professional services provided in consulting on interpretations and application of FASB pronouncements and SEC regulations. Tax Fees represent fees for services in connection with the preparation and filing of tax returns in jurisdictions outside the United States. All Other Fees primarily include labor law certification services provided to the Company’s foreign subsidiaries in accordance with local requirements.

The Audit Committee has determined that the provision of the services described above is compatible with maintaining the independence of our independent registered public accountants. All services described in the foregoing table were approved in conformity with the Audit Committee’s pre-approval process.

Pre-approval Policy for Services of Independent Registered Public Accounting Firm. The Audit Committee’s policy is to pre-approve all audit services, audit-related services and other services permitted by law provided by the independent registered public accounting firm. In accordance with that policy, the Audit Committee annually reviews and approves a list of specific services and categories of services, including audit, audit related, tax, and other permitted services, for the current or upcoming fiscal year, subject to specified terms and cost levels. Any service not included in the approved list of services or any modification to previously approved services, including changes in fees, must be specifically pre-approved by the Audit Committee. Where proposed additions or modifications relate to tax and all other non-audit services to be provided by the independent registered public accounting firm, the Audit Committee may delegate the

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responsibility of pre-approval to the chairperson of the Audit Committee. To ensure prompt handling of unforeseeable or unexpected matters that arise between Audit Committee meetings, the Audit Committee has delegated authority to its chairperson, and/or to such other members of the Audit Committee that the chairperson may designate, to review and, if appropriate, approve in advance, any request by the independent registered public accounting firm to provide tax and/or all other non-audit services.

Audit Committee Report

In connection with the Company’s consolidated financial statements for the year ended December 31, 2022, the Audit Committee has:

Based on the review and discussions with the Company’s management and the independent registered public accounting firm, as set forth above, the Audit Committee recommended to the Board that the audited financial statements be included in the Company’s 2022 Annual Report, for filing with the SEC.

The foregoing report is respectfully submitted by the members of the Audit Committee at the time of the recommendation.

Andrew R. Morse

R. Christopher Regan

Julie Persily

The foregoing report shall not be deemed incorporated by reference by any general statement or reference to this Proxy Statement into any filing under the Securities Act of 1933, as amended (the “Securities Act”) or under the Exchange Act, except to the extent that the Company specifically incorporates this information by reference, and shall not otherwise be deemed filed under those Acts.

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OTHER MATTERS

Other Actions at the Annual Meeting

The Board does not intend to present any other matter at the Annual Meeting. The Board has not been informed that any other person intends to present any other matter for action at the Annual Meeting. If any other matters properly come before the Annual Meeting, the persons named in the accompanying proxy intend to vote the proxies in accordance with their best judgment.

ANNUAL REPORT

A copy of the Company’s 2022 Annual Report accompanies this Proxy Statement and should be read in conjunction herewith.

STOCKHOLDER NOMINATION OF DIRECTORS

The By-Laws establish an advance notice procedure with regard to the nomination (other than by or at the direction of the Board or a committee thereof) of candidates for election as directors (the “Nomination Procedure”). Only persons who are nominated by the Board, a committee appointed by the Board, or by a stockholder who has complied with the nomination procedures set forth in the By-Laws and provided timely written notice to the Secretary of the Company prior to the meeting at which directors are to be elected, are eligible for election as directors of the Company. To be timely, a stockholder’s notice must be delivered or mailed to and received by the Secretary of the Company at the Company’s principal executive offices not earlier than the close of business on the one hundred fiftieth (150th) day nor later than the close of business on the one hundred twentieth (120th) day prior to the first anniversary date of the previous year’s annual meeting of stockholders (or if there was no such prior annual meeting, not earlier than the close of business on the one hundred fiftieth (150th) day nor later than the one hundred twentieth (120th) day prior to the date which represents the second Tuesday in May of the current year); provided, however, that in the event that the date of the annual meeting is more than twenty-five (25) days before or after such anniversary date, then, to be considered timely, notice by the stockholders must be received not later than the close of business on the tenth (10th) day following the date on which public announcement of the date of such meeting is first made by the Company. The notice must contain (A) as to each person whom the stockholder proposes to nominate for election as a director (i) all information relating to such person that is required to be disclosed in solicitations of proxies for election of directors in an election contest, or is otherwise required, in each case pursuant to and in accordance with Regulation 14A under the Exchange Act and (ii) such person’s written consent to being named in the proxy statement as a nominee and to serving as a director if elected; (B) as to any other business that the stockholder proposes to bring before the annual meeting, (i) a brief description of the business desired to be transacted, (ii) the text of the proposal or business (including the text of any resolutions proposed for consideration and, in the event that such business includes a proposal to amend the By-Laws, the language of the proposed amendment), (iii) the reasons for conducting such business at the meeting and (iv) any material interest of such stockholder in such business; and (C) as to the stockholder giving the notice on whose behalf the nomination or proposal is made (i) the name and address, as they appear on the Company’s most recent stockholder lists, of the stockholder proposing such proposal, (ii) the class and number of shares of capital stock of the Company which are beneficially owned by the stockholder, (iii) a description of any agreement, arrangement or understanding with respect to the nomination or other proposal between or among such stockholder, any affiliate or associate, and any others acting in concert with any of the foregoing, (iv) a description of any agreement, arrangement or understanding (including any derivative or short positions, profit interests, options, warrants, stock appreciation or similar rights, hedging transactions, and borrowed or loaned shares) that has been entered into as of the date of the stockholder’s notice by, or on behalf of, such stockholder, the effect or intent of which is to mitigate loss to, manage risk or benefit of share price changes for, or increase or decrease the voting power of, such stockholder, with respect to shares of stock of the Company, (v) a representation that the stockholder is a holder of record of stock of the Company entitled to vote at such meeting and intends to appear virtually or by proxy at the meeting to propose such business or nomination, and (vi) a representation whether the stockholder intends or is part of a group which intends (a) to deliver a proxy statement and/or form of proxy to holders of at least the percentage of the Company’s

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outstanding capital stock required to approve or adopt the proposal or elect the nominee or (b) otherwise to solicit proxies from stockholders in support of such proposal or nomination. Any stockholder who desires to propose any matter at an annual meeting of stockholders shall, in addition to the aforementioned requirements described in clauses (A) through (C), comply in all material respects with the content and procedural requirements of Rule 14a-8 of Regulation 14A under the Exchange Act, irrespective of whether the Company is then subject to such rule or said act. The presiding officer of the meeting may refuse to acknowledge nomination of any person not made in compliance with the Nomination Procedure.

Although the By-Laws do not empower the Board with the right to approve or disapprove of stockholder nominations for the election of directors or any other business properly brought by the Company’s stockholders at any annual or special meeting, the foregoing Nomination Procedure may nevertheless have the effect of (i) precluding a nomination for the election of directors or precluding the transaction of business at a particular meeting if the proper procedures are not followed, or (ii) deterring a third party from conducting a solicitation of proxies or contest to elect his or its own slate of director nominees or otherwise attempting to obtain control of the Company.

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STOCKHOLDER PROPOSALS FOR THE 2024 ANNUAL MEETING

Proposals that stockholders believe should be voted upon at the Company’s annual meeting of stockholders may be eligible for inclusion in the Company’s Proxy Statement. In accordance with the provisions of Rule 14a-8 under the Exchange Act, Stockholder proposals for the 2024 annual meeting of stockholders must be received by the Company on or before January 5, 2024, to be eligible for inclusion in the proxy statement and proxy card relating to the 2023 annual meeting of stockholders, unless the Company determines to hold the meeting more than 30 days before or after the anniversary of the 2023 meeting. Under those circumstances, the Company will issue a public announcement as soon as it determines the meeting date and stockholder proposals will need to be submitted within a reasonable time before the Company expects to print the proxy. Any such proposals should be sent via registered, certified or express mail to: Corporate Secretary, SEACOR Marine Holdings Inc., 12121 Wickchester Lane, Suite 500, Houston, Texas 77079.

As a separate and distinct matter from proposals under Rule 14a-8, in accordance with Article I, Section 3 of the By-Laws of the Company, in order for business to be properly brought before the next annual meeting by a stockholder, such stockholder must deliver to the Company timely notice thereof. To be timely, a stockholder’s notice must be delivered or mailed to and received by the Corporate Secretary at the principal executive offices of the Company, not earlier than the close of business on the one hundred fiftieth (150th) day nor later than the close of business on the one hundred twentieth (120th) day prior to the first anniversary date of the previous year’s annual meeting (or if there was no such prior annual meeting, not earlier than the close of business on the one hundred fiftieth (150th) day nor later than the one hundred twentieth (120th) day prior to the date which represents the second Tuesday in May of the current year); provided, however, that in the event that the date of the annual meeting is more than twenty-five (25) days before or after such anniversary date, then, to be considered timely, notice by the stockholders must be received not later than the close of business on the tenth (10th) day following the date on which public announcement of the date of such meeting is first made by the Company. In no event shall the public announcement of an adjournment or postponement of an annual meeting commence a new time period (or extend any time period) for the giving of a stockholder’s notice as described above.

The SEC permits a single set of annual reports and proxy statements to be sent to any household at which two or more stockholders reside if they appear to be members of the same family. Each stockholder continues to receive a separate proxy card. This procedure, referred to as “householding,” reduces the volume of duplicate information stockholders receive and reduces mailing and printing expenses. A number of brokerage firms have instituted householding.

As a result, if a stockholder holds shares through a broker and resides at an address at which two or more stockholders reside, that stockholder will likely be receiving only one annual report and proxy statement unless any stockholder at that address has given the broker contrary instructions. However, if any such stockholder residing at such an address wishes to receive a separate annual report or proxy statement in the future, or if any such stockholder that elected to continue to receive separate annual reports or proxy statements wishes to receive a single annual report or proxy statement in the future, that stockholder should contact their broker or send a request to the Secretary at the Company’s principal executive offices. The Company will deliver, promptly upon written or oral request to the Secretary, a separate copy of the 2022 Annual Report and this Proxy Statement to a stockholder at a shared address to which a single copy of the documents was delivered.

For the Board of Directors,

Andrew H. Everett II

Senior Vice President

General Counsel and Secretary

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IMPORTANT VOTING INFORMATION

Your broker is not permitted to vote on your behalf on the election of directors and other matters to be considered at the Annual Meeting (except on ratification of the selection of Grant Thornton LLP as auditors for 2022), unless you provide specific instructions by completing and returning the voting instruction card. For your vote to be counted, you now must communicate your voting decisions to your broker, bank or other financial institution before the date of the Annual Meeting.

Your Participation in Voting the Shares You Own is Important

Voting your shares is important to ensure that you have a say in the governance of your company and to fulfill the objectives of the majority voting standard that we apply in the election of directors. Please review the proxy materials and follow the instructions on the proxy card or voting instruction card to vote your shares. We hope you will exercise your rights and fully participate as a stockholder in our Company’s future.

More Information is Available

If you have any questions about the proxy voting process, please contact the broker, bank or other financial institution where you hold your shares. The SEC also has a website (www.sec.gov/spotlight/proxymatters.shtml) with more information about your rights as a stockholder. Additionally, you may contact our Investor Relations Department at InvestorRelations@seacormarine.com.

50

MARINE
P.O. BOX 8016, CARY, NC 27512-9903
YOUR VOTE IS IMPORTANT! PLEASE VOTE BY:
INTERNET
Go To: www.proxypush.com/SMHI
Cast your vote online
Have your Proxy Card ready
Follow the simple instructions to record your vote
PHONE Call 1-866-859-2198
Use any touch-tone telephone
Have your Proxy Card ready
Follow the simple recorded instructions
MAIL
Mark, sign and date your Proxy Card
Fold and return your Proxy Card in the postage-paid envelope provided
You must register to attend the meeting online and/or participate at www.proxydocs.com/SMHI
SEACOR Marine Holdings Inc.
Annual Meeting of Stockholders
For Stockholders of record as of April 17, 2023
TIME: Tuesday, June 6, 2023 9:00 AM, Eastern Time
PLACE: Annual Meeting to be held via a live audio webcast on the Internet - please visit www.proxydocs.com/SMHI for more details.
This proxy is being solicited on behalf of the Board of Directors
The undersigned hereby appoints Jesús Llorca and Andrew H. Everett II (the “Named Proxies”), 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 common stock of SEACOR Marine Holdings 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.
THE SHARES REPRESENTED BY THIS PROXY WILL BE VOTED AS DIRECTED OR, IF NO DIRECTION IS GIVEN, SHARES WILL BE VOTED IDENTICAL TO THE BOARD OF DIRECTORS’ RECOMMENDATION. This proxy, when properly executed, will be voted in the manner directed herein. In their discretion, the Named Proxies are authorized to vote upon such other matters that may properly come before the meeting or any adjournment or postponement thereof.
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 (on the reverse side) and return this card.
PLEASE BE SURE TO SIGN AND DATE THIS PROXY CARD AND MARK ON THE REVERSE SIDE

SEACOR Marine Holdings Inc.
Annual Meeting of Stockholders
Please make your marks like this: X
THE BOARD OF DIRECTORS RECOMMENDS A VOTE FOR ON EACH OF THE NOMINEES LISTED IN PROPOSAL 1, FOR ON PROPOSALS 2 AND 4, AND 1 YR ON PROPOSAL 3
PROPOSALS YOUR VOTE BOARD OF DIRECTORS RECOMMENDS
1. Election of Directors
FOR WITHHOLD
1.01 Andrew R. Morse FOR
1.02 John Gellert FOR
1.03 R. Christopher Regan FOR
1.04 Julie Persily FOR
1.05 Alfredo Miguel Bejos FOR
FOR AGAINST ABSTAIN
2. Advisory vote to approve Named Executive Officer compensation (Say on Pay) FOR
1YR 2YR 3YR ABSTAIN
3. Advisory vote to approve the frequency of advisory votes to approve Named Executive Officer compensation (Say on Frequency)
FOR AGAINST ABSTAIN
4. Ratification of the appointment of Grant Thornton LLP as SEACOR Marine Holdings Inc.’s independent registered public accounting firm for the fiscal year ending December 31, 2023 FOR
NOTE: The Named Proxies are authorized to vote upon such other matters that may properly come before the meeting or any adjournment or postponement thereof.
You must register to attend the meeting online and/or participate at www.proxydocs.com/SMHI
Authorized Signatures - Must be completed for your instructions to be executed.
Please sign exactly as your name(s) appears on your account. If held in joint tenancy, all persons should sign. Trustees, administrators, etc., should include title and authority. Corporations should provide full name of corporation and title of authorized officer signing the Proxy/Vote Form.
Signature (and Title if applicable) Date Signature (if held jointly) Date