2025 NOTICE OF ANNUAL MEETING OF STOCKHOLDERS AND PROXY STATEMENT

INNOSPEC INC. 8310 South Valley Highway, Suite 350, Englewood, CO 80112

NOTICE OF 2025 ANNUAL MEETING OF STOCKHOLDERS

Stockholders may also transact any other business properly brought before the meeting. At this time, the Board of Directors knows of no other proposals or matters to be presented.

On behalf of the Board of Directors:

David B. Jones
Senior Vice President, General Counsel,
Chief Compliance Officer, and Corporate Secretary
March 26, 2025

PROXY STATEMENT

INFORMATION ABOUT THE 2025 ANNUAL MEETING OF STOCKHOLDERS AND VOTING AT THE MEETING

 

Why did you send me the Notice Regarding the Availability of Proxy Materials?

We sent you the Notice Regarding the Availability of Proxy Materials (the “Notice”) because the Board of Directors (the “Board”) of Innospec Inc. (“Innospec” or the “Company”) is soliciting your proxy to vote at the 2025 Annual Meeting of Stockholders, which will be held on Friday, May 9, 2025 at 10.00 a.m. Central Time, at The Westin and The Woodlands, 2 Waterway Square Place, The Woodlands, Houston TX 77380 .

This Proxy Statement summarizes the information you need to vote at the Annual Meeting. You do not need to attend the Annual Meeting to vote your stock. Alternatively, you may simply vote by telephone, over the internet, or, if you have requested written proxy materials, by completing, signing and returning the accompanying proxy card.

Innospec intends to commence distribution of the Notice to stockholders on or about March 27, 2025.

What proposals will be voted on at the Annual Meeting of Stockholders?

You are being asked to consider and vote on three proposals at the Annual Meeting. The following is a summary of the proposals and the voting recommendations of the Board with respect to each proposal:

Are proxy materials available on the internet?

Yes. This Proxy Statement, and the proxy card, for the Annual Meeting and our 2024 Annual Report on Form 10-K are available at www.envisionreports.com/iosp for stockholders of record and www.edocumentview.com/iosp for beneficial owners.

Who is entitled to vote at the meeting?

March 14, 2025 is the record date for the Annual Meeting. If you owned Innospec Common Stock at the close of business on March 14, 2025, you are entitled to vote. On this record date, we had 25,119,542 shares of our Common Stock outstanding and entitled to vote at the Annual Meeting. Our Common Stock is our only class of voting stock.

How many votes do I have?

You have one vote for each share of Common Stock that you owned at the close of business on the March 14, 2025 record date. Your Notice indicates the number of shares of Common Stock you are entitled to vote.

What is the difference between holding stock as a stockholder of record and as a beneficial owner?

Although many stockholders are the record holders of their stock, others hold their stock beneficially, which means it is held through a stockbroker, bank or other nominee rather than directly in the stockholder’s own name. As summarized below, there are some differences between stock held of record and stock owned beneficially.

Stockholder of Record

If your shares of Common Stock are registered directly in your name with our transfer agent, Computershare, you are considered, with respect to those shares, the stockholder of record and the Notice is being sent to you directly at your address of record. As the stockholder of record, you have the right to grant your voting proxy directly to Innospec by voting by telephone or via the internet, or, if you have requested written materials, by signing, dating and returning your proxy card to Innospec. Alternatively, you may vote in person at the Annual Meeting. For more information on voting by telephone or via the internet see the description below under the heading “Information about the 2025 Annual Meeting of Stockholders and Voting at the Meeting - May I vote by telephone or via the internet?”.

Beneficial Owner

If your Common Stock is held in a stock brokerage account or by a bank or other nominee, you are considered the beneficial owner of stock held in “street name” and our proxy materials are being forwarded to you by your broker or nominee who is considered the stockholder of record with respect to those shares. As the beneficial owner, you have the right to direct your broker or nominee on how to vote your stock and are also invited to attend the Annual Meeting. However, since you are not the stockholder of record, you may only vote these shares at the Annual Meeting if you follow the instructions described below under the heading “Information about the 2025 Annual Meeting of Stockholders and Voting at the Meeting - How do I attend and vote at the Annual Meeting?”.

Your broker or nominee has provided a voting instruction card for you to use in directing your broker or nominee as to how to vote your stock. You may also vote by telephone or via the internet by following your broker or other nominee’s directions as described below under the heading “Information about the 2025 Annual Meeting of Stockholders and Voting at the Meeting - May I vote by telephone or via the internet?”.

How do I vote by proxy if I am a stockholder of record?

If you are a stockholder of record and you request a physical proxy card and properly fill in such proxy card and it is completed and received by us (and not revoked) prior to the Annual Meeting, or you vote by internet or telephone, your “proxy” (i.e., one of the individuals named on your proxy card) will vote your stock as you have directed. If you sign the proxy card (including by electronic signature in the case of internet or telephonic voting), but do not make specific voting choices, the person holding your proxy will vote your stock as recommended by the Board as follows:

“FOR” the election of three Class III Directors;

“FOR” the approval, on an advisory basis, of the Company’s executive compensation; and

“FOR” the ratification of the appointment of the Company’s independent registered public accounting firm.

If any other matter is presented at the Annual Meeting, your vote will be cast in accordance with the best judgment of the individuals named on your proxy card. As of the date of this Proxy Statement, we know of no such other matters that need to be acted on at the Annual Meeting.

How do I give voting instructions if I am a beneficial owner?

If you are a beneficial owner of stock, your broker will communicate with you directly and ask you how you want your stock to be voted. If you give the broker voting instructions, the broker will vote your stock as you direct. If you do not give the broker voting instructions, one of two things can happen, depending on the type of proposal in question. Brokers have discretionary power to vote your stock with respect to “routine” matters, but they do not have discretionary power to vote your stock on “non-routine” matters. Brokers holding stock beneficially owned by their clients do not have the ability to cast votes with respect to the election and ratification of directors or executive compensation unless they have received instructions from the beneficial owner of the stock because these are considered “non-routine” matters. It is therefore important that you provide voting instructions to your broker if your shares of Common Stock are held beneficially through a broker so that your vote with respect to directors and executive compensation, and any other matter treated as “non-routine”, is counted.

May I vote by telephone or via the internet?

Yes, you may vote by telephone or via the internet up until 11:59 P.M. Eastern Time the day before the Annual Meeting date. We encourage you to do so because your vote will be tabulated faster than if you mailed it. Please note the following depending on whether you are a stockholder of record or a beneficial owner whose shares are held by a bank or broker in “street name”:

If you are a stockholder of record, you may vote electronically through the internet at www.envisionreports.com/iosp or by telephone Toll Free 1-800-652-8683 within the U.S.A., U.S. Territories and Canada. Be sure to have your control number, which appears on your Notice or proxy card, with you when you vote.

If you are a beneficial owner and hold your stock in “street name”, you may vote electronically through the internet at www.proxyvote.com and you should contact your bank or broker to determine whether you will be able to vote by telephone. Be sure to have your control number, which appears on your Notice or proxy card, with you when you vote.

Whether or not you plan to attend the Annual Meeting, we urge you to vote. Doing so by returning the proxy card or voting by telephone or via the internet will not affect your ultimate right to attend and vote at the meeting.

May I revoke my proxy?

Yes. If you change your mind after you vote, you may revoke your proxy by following any of the procedures described below. To revoke your proxy:

•Send in another signed proxy with a later date or resubmit your vote by telephone or the internet;

•Send a letter revoking your proxy to Mr. David B. Jones, Senior Vice President, General Counsel, Chief Compliance Officer and Corporate Secretary at Innospec Inc., 8310 South Valley Highway, Suite 350, Englewood, CO 80112; or

•Attend the Annual Meeting and vote in accordance with the instructions described below.

If you wish to revoke your proxy, you must do so sufficiently in advance to permit the necessary examination and tabulation of the subsequent proxy or revocation before the vote is taken.

How do I attend and vote at the 2025 Annual Meeting?

If you are a stockholder of record, you may attend the meeting and vote your shares in person. If you choose to do so, please bring your Notice, or proxy card showing your control number and proof of identification.

If you are the beneficial owner of stock held in “street name”, you may vote your shares in person only if you obtain a signed proxy from the stockholder of record giving you the right to vote the stock. To do so, you must bring to the 2025 Annual Meeting of Stockholders proof of identification, an account statement or letter from the broker, bank or other nominee indicating that you are the owner of the stock and a signed proxy from the stockholder of record giving you the right to vote the stock. The account statement or letter must show that you were the beneficial owner of the stock on the Record Date.

Even if you plan to attend the 2025 Annual Meeting of Stockholders in person, Innospec recommends that you vote your stock in advance by internet or telephone, or by returning the accompanying proxy card, as described above, so that your vote will be counted if you later decide not to attend the 2025 Annual Meeting of Stockholders.

Is a stockholder list available for examination?

For 10 days prior to the Annual Meeting, a complete list of stockholders of record entitled to vote at the Annual Meeting will be available for examination by any stockholder for any purpose relevant to the Annual Meeting. Stockholders may view the list at Innospec’s corporate headquarters at 8310 South Valley Highway, Suite 350, Englewood, CO 80112 during office hours and showing their control number and photo identification. The stockholders list will also be available during the Annual Meeting.

What votes need to be present to hold the Annual Meeting?

To have a quorum for our Annual Meeting, the holders of a majority of the shares of Common Stock outstanding and entitled to vote need to be present or represented by proxy. Abstentions and broker “non-votes” are treated as present and entitled to vote and are counted in determining whether we have a quorum.

What vote is required to approve each proposal?

*While directors are elected by a plurality vote, we have a “majority vote” director resignation policy in place, as described on page 32.

**As Proposal 2 is an advisory vote, there is no specified vote requirement for approval. Innospec will consider that the affirmative vote of the majority of the stock present or represented by proxy and entitled to vote on such proposal reflects the advice of the stockholders.

How are votes counted?

*If you “withhold” authority to vote with respect to one or more nominees for Innospec Director, your vote will have no effect on the election of such nominees.

**While directors are elected by a plurality vote, we have a “majority vote” director resignation policy in place, as described on page 32.

If you sign (including electronic confirmations in the case of internet or telephone voting) your proxy card with no instructions on how to vote, your stock will be voted in accordance with the recommendations of the Board. If you sign (including electronic confirmation in the case of internet or telephone voting) your broker voting instruction card with no instructions on how to vote, your stock will be voted in the broker’s discretion only with respect to “routine” matters, but will not be voted with respect to “non-routine” matters. As described in “Information about the 2025 Annual Meeting of Stockholders and Voting at the Meeting—How do I give voting instructions if I am a beneficial owner?”, election of directors and executive compensation are considered “non-routine” matters. We will appoint one or more inspectors of election to count votes cast by proxy.

What is the effect of broker non-votes and abstentions?

A broker “non-vote” occurs when a broker holding stock for a beneficial owner does not or cannot vote on a particular proposal because the broker does not have discretionary voting power for that particular proposal and has not received instructions from the beneficial owner.

Common Stock owned by stockholders electing to abstain from voting with respect to any proposal will be counted towards the presence of a quorum. Common Stock beneficially owned and voted by the beneficiary through a broker will be counted towards the presence of a quorum, even if there are broker non-votes with respect to some proposals, as long as the broker votes on at least one “non-routine” proposal.

Abstentions and instructions to withhold votes with respect to any nominee for director election (which uses a plurality standard) will result in those nominees receiving fewer votes but will not count as votes “against” the nominee. Broker non-votes will not be considered present and entitled to vote with respect to elections of directors and therefore will have no direct effect on the outcome of the election of directors. Abstentions will be treated as present and entitled to vote with respect to Proposals 2 and 3 and, therefore, will have the effect of votes “against” these proposals. Broker non-votes will have no direct effect on the outcome of these proposals.

What happens if the Annual Meeting is adjourned or postponed?

Your proxy will still be effective and will be voted at the rescheduled Annual Meeting. You will still be able to change or revoke your proxy until it is voted.

Where can I find the voting results?

Final voting results will be disclosed in a Form 8-K to be filed with the U.S. Securities and Exchange Commission (“SEC”) within four business days after the 2025 Annual Meeting of Stockholders. If official results are not available at that time, we will provide preliminary voting results in the Form 8-K and will provide the final results in an amendment to the Form 8-K as soon as they become available. You can find the Form 8-K on our website at www.innospec.com.

Will Innospec’s independent accountants attend the Annual Meeting?

A representative of PricewaterhouseCoopers LLP (“PwC”), our current independent registered public accounting firm, will be available by telephone at the Annual Meeting to answer questions and will have an opportunity to make a statement if such representative wishes.

Do Directors attend the Annual Meeting?

Our Corporate Governance Guidelines provide that Directors are expected to attend our annual meetings of stockholders and any special meetings of stockholders called by Innospec to consider extraordinary business transactions. Unless they are unable to do so as a result of special circumstances, Directors are encouraged to attend all other special meetings of stockholders called by Innospec. All our Directors then in office attended the 2024 Annual Meeting of Stockholders that was held on May 10, 2024.

Whom should I call if I have any questions?

If you have any questions about the Annual Meeting, voting or directions to attend the Annual Meeting, please contact Mr. David B. Jones, Innospec’s Senior Vice President, General Counsel, Chief Compliance Officer and Corporate Secretary.

CORPORATE GOVERNANCE

Corporate Governance Highlights

We are committed to good corporate governance, which promotes the long-term interests of our stakeholders, strengthens Board and management accountability, and helps build public trust in the Company. The Corporate Governance section below describes our governance framework, which includes the following highlights:

Our Corporate Governance Framework

Corporate Governance Principles

Innospec places the strongest emphasis on high standards of Corporate Governance. We have policies to guide all our employees, Directors and third-party representatives and provide extensive training to help ensure that we operate to these standards throughout the Company. Through its Nominating, Corporate Governance and Sustainability Committee, the Board evaluates our corporate governance policies and practices, which form our corporate governance framework, against evolving best practices as benchmarks for assessing that we follow appropriate standards when conducting our business.

One of the cornerstones of our Corporate Governance is transparency. Accordingly, you will find the following key policies and procedures on our website.

Corporate Governance Guidelines

Our Board believes that adherence to sound corporate governance policies and practices is important so that the Company is governed and managed with the highest standards of responsibility, ethics and integrity and by taking into account the interests of all stakeholders. We have adopted a set of Corporate Governance Guidelines intended to reflect a set of core values that provide the foundation for our governance and management systems and our interactions with others.

Our Corporate Governance Guidelines address key governance matters, including, but not limited to:

•Selection and composition of the Board;

•Director orientation and continuing education;

•Board membership criteria and selection process;

•Board operations, including the size of the Board, Board independence and Board committee structure;

•Director responsibilities;

•Executive sessions of non-employee Directors;

•Performance evaluations of the Board, Committees of the Board and individual Directors;

•Director compensation;

•Director access to management and outside advisors;

•Management succession;

•Resignation policy in uncontested Director elections; and

•Limits on Board members serving on other public company boards.

The Board believes that corporate governance is an evolving process and generally reviews the Corporate Governance Guidelines every two years and updates them when appropriate. A current copy of the Corporate Governance Guidelines can be found on our website under the heading Corporate Governance at www.innospec.com/about-us/corporate-governance, or by writing to Mr. David B. Jones, Senior Vice President, General Counsel, Chief Compliance Officer and Corporate Secretary at Innospec Inc., 8310 South Valley Highway, Suite 350, Englewood, CO 80112.

Innospec’s Leadership Structure

The Board believes that the roles of Chairman of the Board (a non-executive position) and Chief Executive Officer should remain separate to enable the Board to provide effective guidance to management and promote oversight and accountability of management. This separation preserves the distinction between the management and oversight functions, maintaining the responsibility of management to help develop corporate strategy and the responsibility of the Board to review and provide input on corporate strategy.

To fulfill the role, the Chairman of the Board, among other things, creates and maintains an effective working relationship between the Board and the Company’s management; provides the CEO with on-going direction as to current Board needs, interests, views and expectations; and directs the Board agenda to the matters of greatest importance to Innospec.

The Board’s Role in Risk Management

The Board’s role in risk oversight and management is consistent with our leadership structure, with the CEO and other members of senior management having responsibility for assessing and managing the Company’s risk exposure, and the Board and its committees providing oversight in connection with these efforts. Risk management is an integral part of Board and committee deliberations throughout the year. During 2024, the Senior Vice President, Corporate Development and Investor Relations, presented a summary of key risks facing the Company so the Board could discuss and assess such risks and the management of them on a timely and on-going basis.

The Global IT Director presents his information technology and cyber security update to the Board in person at least annually.

In fiscal 2024, each of our Directors completed our Code of Business Ethics on-line compliance training program that we require our employees to complete. In addition, in fiscal 2024, as part of our risk oversight of our information technology systems and risk mitigation efforts, employee training on cyber security risks was required of all Innospec Directors and employees who have access to our information technology resources.

NCC Group (“NCC”) performs periodic cyber security reviews. NCC reports its findings directly to the Board.

Risk oversight – Who is responsible?

•monitors and evaluates how management operates the Company

•considers updates received from management regarding quarterly performance

•works with management on the corporate strategy

•discusses risks related to the Company’s business strategy at periodic strategic planning meetings and at other meetings as appropriate

•oversees risks related to environmental, social and governance matters

•reviews quarterly assessment of the primary operational and regulatory risks facing the Company, their relative magnitude and management’s plan for mitigating and responding to these risks, including cyber security risk as needed; and

•reviews insurance coverage to assess whether it is adequate.

•considers the adequacy of steps taken by management to monitor and control the Company’s major financial risk exposures

•is responsible for reviewing the Company’s policies and practices with respect to financial risk assessment and the integrity of the accounting policies, financial reporting and disclosure practices of Innospec; and

•oversees the performance of the Company’s systems of internal accounting and financial control.

•provides oversight to review compensation risk and to assess that all of the Company’s executive compensation and incentive programs are competitive, closely related to the achievement of corporate objectives and aligned with long-term interests of the stockholders. The Company has determined that there are currently no risks arising from its compensation policies and practices that are reasonably likely to have a material adverse effect on the Company.

 

•oversees the development of and recommends to the Board a framework of corporate governance policies and procedures and a robust compliance program

•takes a leadership role in shaping and communicating matters of corporate governance and business ethics to the Board and the Company

•monitors and periodically reports to the Board on the compliance status across the Innospec Group

•monitors and discusses the work of the Executive Team ESG Steering Group and reports matters to the full Board which has oversight for environmental, social and governance risk; and

•nominates new directors and considers diversity, skills required for the Board to meet its obligations and various other stakeholder expectations.

Director Independence

The Board, after considering all relevant facts and circumstances of which it is aware, including those matters set out below under “Family Relationships” and “Related Person Transactions and Relationships”, has determined that all of its non-employee members are independent, within the meaning of the Nasdaq Marketplace Rule 5605(a)(2) applicable on the date of this Proxy Statement.

We have also adopted our own standards for director independence that can be found in our Director Independence Policy on our website at www.innospec.com/about-us/corporate-governance.

Family Relationships

No immediate family relationship exists between any of our Directors or Executive Officers and any other Directors or Executive Officers.

Transactions and Relationships

Other than the director and executive compensation arrangements discussed in this Proxy Statement and the transaction described below, there have been no transactions since January 1, 2024, to which we have been or will be a participant, in which the amount involved exceeded or will exceed $120,000, and in which any of our directors, executive officers or holders of more than 5% of any class of our voting stock, or any member of the immediate family of, or person sharing the household with, any of these individuals, had or will have a direct or indirect material interest.

The Company has retained and continues to retain Smith, Gambrell & Russell, LLP, a law firm with which Mr. Robert I. Paller is Of Counsel. Mr. Paller was a non-executive Director of the Company from November 1, 2009 until he retired from the Board on May 10, 2024. From January 1, 2024 to May 10, 2024, the Company paid Smith, Gambrell & Russell, LLP, $242,256 in fees for services provided during the period.

Related Person Transactions Approval Policy

Pursuant to our Code of Conduct, all senior officers must disclose to the Board any material transaction or relationship that could reasonably be expected to give rise to a conflict of interest. The Code of Conduct also states that no employee may seek to obtain special treatment from Innospec for family members, friends or for businesses in which family members or friends have an interest. During the year ended December 31, 2024, the Company did not make any charitable contributions to any charity on which any Director serves as an executive officer.

Executive Sessions of Independent Non-Employee Directors

Executive sessions of independent non-employee Directors are led by the Chairman. An executive session is held in conjunction with each regularly scheduled Board meeting and other sessions may be called by the Chairman at his discretion or at the request of the Board. There were four executive sessions of independent non-employee Directors during fiscal year 2024.

The Board will continue to monitor the standards for director independence established under applicable law or Nasdaq listing requirements and will maintain the Company’s Corporate Governance Guidelines to be consistent with those standards.

Identifying and Evaluating Nominees for Director

The Nominating, Corporate Governance and Sustainability Committee uses a variety of methods for identifying and evaluating nominees for Director. The Nominating, Corporate Governance and Sustainability Committee considers each person’s judgment, experience, independence, understanding of our business or other related industries and such factors as the committee determines relevant in light of the needs of the Board and the Company. The Nominating, Corporate Governance and Sustainability Committee reviews the skills and attributes of Board members within the context of the current make-up of the full Board and regularly assesses the appropriate size of the Board and whether vacancies on the Board are expected due to retirement or otherwise.

In the event that vacancies are anticipated, or otherwise arise, the Nominating, Corporate Governance and Sustainability Committee considers potential candidates for Director. Candidates may come to the attention of the Nominating, Corporate Governance and Sustainability Committee through current Board members, stockholders or other persons. In addition, during 2019, 2020 and 2021 the Nominating, Corporate Governance and Sustainability Committee retained a professional search firm to assist in identifying and evaluating potential candidates for nomination at the Annual Meeting. In line with our Board Diversity Policy, the Board considers diversity in the nominating process, along with other criteria, for potential Director candidates and specifically requests that females and minority candidates are included in every Director search pool. The recruitment specification for new Directors concentrates on candidates who are seasoned executive officers, with significant relevant experience, both at board level and within relevant industries.

The Director candidates are evaluated at regular or special meetings of the Nominating, Corporate Governance and Sustainability Committee and may be considered at any time during the year. The nominees for election at this year’s Annual Meeting of Stockholders were approved for nomination by the Board upon the recommendation of the Nominating, Corporate Governance and Sustainability Committee.

Our Director recruitment process is as follows:

The policy of the Nominating, Corporate Governance and Sustainability Committee is to consider properly submitted stockholder nominations for election to the Board. In order for any candidate to be considered by the Nominating, Corporate Governance and Sustainability Committee, and if nominated, included in the Proxy Statement, such recommendation should be received no later than the deadline for submission of stockholder proposals. See “Stockholders’ Proposals for the 2026 Annual Meeting of Stockholders”. Recommendations should be sent to the Corporate Secretary and should specify the nominee’s name, qualification for Board membership and any other information required by the Company’s Bylaws. All properly submitted stockholder nominations for Director candidates received by the Corporate Secretary will be submitted to the Nominating, Corporate Governance and Sustainability Committee for review and consideration. The Nominating, Corporate Governance and Sustainability Committee will consider stockholder recommendations for Director candidates, but the Nominating, Corporate Governance and Sustainability Committee has no obligation to recommend such candidates. Assuming appropriate biographical and background information (including qualifications) is provided for Director candidates recommended by stockholders, the Nominating, Corporate Governance and Sustainability Committee will use the same process to evaluate Director nominees recommended by stockholders as it does to evaluate nominees identified by other sources.

Director On-Boarding and Continuing Education

Overview:

The Board and management conduct orientation for new Directors to become familiar with, amongst other things, Innospec’s business operations, strategies, financial matters, ethics, fiduciary duties, corporate governance and all other Company policies. It is the responsibility of management and the Nominating, Corporate Governance and Sustainability Committee to advise Directors about continuing education opportunities, which they are encouraged to pursue. The Legal and Compliance Department provides training to the Board at least annually and the Chief Compliance Officer regularly updates the Nominating, Corporate Governance and Sustainability Committee and full Board on evolving law and practices and stockholder expectations.

Orientation:

When new Directors join the Board, they participate in a comprehensive on-boarding program to learn about our industry, business, strategies, and policies. Our on-boarding program includes provision of reading material regarding director duties and responsibilities, meetings with division heads and senior executives to discuss our businesses, strategy, operations and our corporate functions such as finance, information technology, research and development, and legal and compliance. New Directors also meet with the executives and staff supporting the Committees on which they sit and are provided with information and training specific to the Board Committee(s) they are appointed to. In addition, every Director must complete induction training on compliance within two weeks of being appointed and a more in-depth training once they have been in office for six months.

Continuing education:

For continued education regarding our business and industry, at least annually, we provide presentations by internal and external experts during our regular Board meetings on topics such as, industry trends, risks facing the industry and the Company, corporate governance trends and key topics, and stakeholder expectations with particular focus on the implications and impact on the Company. In 2024, the Board received training on D&O, Property and Casualty insurance, Environmental, Social and Governance (ESG) issues and evolving practices.

Meetings and Attendance

In 2024, the full Board met four times, the Audit Committee met four times, the Compensation Committee met four times, and the Nominating, Corporate Governance and Sustainability Committee met four times. There were four Non-Employee Director meetings at which no members of management were present. Directors are expected to attend all Board Meetings and meetings of Committees on which they serve. During the year ended December 31, 2024, each of the Directors attended, in person, by telephone or video call, all the meetings of the Board and meetings of Committees of the Board on which he or she served that were held while he or she was a member. Directors are also expected to attend all meetings of stockholders. All of the Directors attended the 2024 Annual Meeting of Stockholders.

Limitation on Other Board and Audit Committee Positions

The Board has adopted restrictions on the number of outside boards on which Directors may serve that are consistent with market standards and regulatory requirements, including limits on executive officers of publicly- traded companies. So that Directors are able to dedicate sufficient time to Innospec’s Board, the Board established the following limits on our Directors serving on publicly-traded company boards and audit committees:

Any Board member wishing to join the board of another publicly-traded company is required to first notify the Chair of the Nominating, Corporate Governance and Sustainability Committee, the Chairman of the Board, and Innospec’s General Counsel and Chief Compliance Officer prior to joining such other board or agreeing to be nominated or serve on a director slate at such other board. The Chair of the Nominating, Corporate Governance and Sustainability Committee and General Counsel and Chief Compliance Officer will review the proposed board membership to confirm compliance with applicable laws and policies. Potential conflicts of interest, if any, will be referred to the Chairman of the Board for review.

Throughout the year, the Nominating, Corporate Governance and Sustainability Committee monitors the service of our Directors on boards and board committees of other companies, to assess the potential impact of holding multiple positions on the individual Director’s ability to devote sufficient time and attention to his or her duties as a Director of Innospec.

Code of Conduct

The Board has adopted a Code of Conduct, violations of which may be reported to the Chair of the Nominating, Corporate Governance and Sustainability Committee or the Corporate Secretary. This Code of Conduct is intended to promote, among other things, honest and ethical conduct, full and accurate reporting and compliance with applicable laws and regulations. A copy of the Code of Conduct is available on our website under “Corporate Governance” at: www.innospec.com/about-us/corporate-governance.

Supplier Code of Conduct

Innospec believes that honest and transparent business conduct is vital and is committed to ethical business practices and actively enforcing compliance with all applicable laws, regulations and rules. We have therefore adopted a Supplier Code of Conduct, pursuant to which our suppliers are required to comply with all applicable laws, rules and regulations, including those related to business integrity, human rights and safety, health and the environment. Innospec engages EcoVadis to conduct corporate social responsibility risk assessments of key suppliers and those operating out of high-risk locations. Among other things, EcoVadis assessments allow us to evaluate supplier policies and actions taken by the supplier and to identify further actions required to enforce compliance with internationally recognized human rights standards and fair labor practices. In 2021, Innospec extended the scope of its EcoVadis assessment program from raw material suppliers to also include non-raw material suppliers. Since December 2018, all new raw materials suppliers, regardless of location, are also required to undergo an EcoVadis assessment if the Company forecasts that its annual expenditures to such supplier will be above minimum value thresholds designated by the Company.

We also have an internal protocol to support our review of, and response to, concerns raised regarding our supply chain. Innospec may invoke sanctions against suppliers, up to and including termination of the business relationship, if they violate modern slavery laws.

A copy of the Supplier Code of Conduct is available on our website under “Supplier Relations” at: https://innospec.com/about-us/supplier-relations/.

Raising Issues and Reporting Violations

Innospec’s employees, customers, suppliers and other stakeholders play a critical role in establishing, promoting and upholding a culture of compliance. An integral part of that culture is the creation of an environment in which concerns regarding unlawful, fraudulent or unethical matters may be raised without fear of retaliation. Innospec’s employees, customers, suppliers and other stakeholders may report concerns via several mechanisms which are outlined in our Reporting Corporate Governance Concerns Policy (for employees) and Third-Party Notice (for customers, suppliers and other stakeholders) and include a whistleblowing hotline, EthicsPoint. A copy of our Reporting Corporate Governance Concerns Third-Party Notice can be found on our website under “Corporate Governance” at: www.innospec.com/about-us/corporate-governance.

No Retaliation on Reporting Issues or Violations

Our Reporting Corporate Governance Concerns Policy states that Innospec will not retaliate against any person who acts in good faith to report Concerns or helps to investigate or resolve Concerns, including individuals who make reports, conduct investigations, are interviewed as witnesses or provide evidence. Innospec will not tolerate any form of retaliation against any person who reports or helps to investigate or resolve Concerns. Any employee who displays retaliatory behaviors may be subject to disciplinary action, up to and including termination of employment. Any customer, supplier or other stakeholder who displays these behaviors may have their contract or relationship with Innospec terminated.

Stock Trading Policy

We have adopted a Stock Trading Policy that provides restrictions on, and guidelines for, trading Company securities, or the securities of any other company while in possession of material non-public information. The Stock Trading Policy applies to all of our officers, directors, employees, contractors and agents. We believe the Stock Trading Policy is reasonably designed to promote compliance with insider trading laws, rules and regulations, and applicable listing standards. In addition, it is the policy of the Company to comply with all applicable securities laws and regulations. A copy of our Stock Trading Policy is filed with our Annual Report on Form 10-K.

Anti-Hedging Policy

Our Stock Trading Policy contains an anti-hedging provision that prohibits directors, officers and employees from hedging any stock, share or other securities issued by Innospec (including through the use of financial instruments, such as prepaid variable forward contracts, equity swaps, collars and exchange funds) or otherwise engage in transactions that hedge or offset, or are designed to hedge or offset, any decrease in the market value of any stock, share or other securities issued by the Company.

Anti-Pledging Policy

Our Stock Trading Policy contains a provision that prohibits directors, officers and employees from holding any stock, share or other securities issued by the Company in a margin account, or from otherwise pledging such securities as collateral for a loan, unless the person obtains approval in advance from the Nominating, Corporate Governance and Sustainability Committee. No approval will be granted unless that person clearly demonstrates the financial capacity to repay the loan (which must not constitute margin debt) without resorting to the pledged securities (pledges arising from certain types of hedging transactions are governed by the anti-hedging policy described above).

Copies of Code of Conduct, Corporate Governance Guidelines and Committee Charters

Copies of our Code of Conduct, Corporate Governance Guidelines and each of the Board Committee charters can be accessed via the Company’s website under “Corporate Governance” at: https://innospec.com/about-us/corporate-governance. The Company intends to disclose on this section of its website any amendments to, or waivers from, its Code of Conduct that are required to be publicly disclosed pursuant to the rules of the SEC or Nasdaq.

Communications with Our Board

Any stockholder and other interested person who may desire to contact the Chairman or any of the Directors of Innospec may do so via the following e-mail address: contact.board@innospecinc.com, or by writing to them at Innospec Inc., 8310 South Valley Highway, Suite 350, Englewood, CO 80112. The Corporate Secretary or the Assistant General Counsel will review communications received electronically and forward them to the addressee of the communication. The Corporate Secretary will review the communications received by mail or courier and forward to the appropriate addressee.

Board Committees

The Board maintains the following committees to assist it in discharging its oversight responsibilities. The Board has determined that each member of the following committees is an independent director. The current membership of each committee is:

 

*In the case of Mr. Landless, the Board made this determination based on Mr. Landless’ qualification as a chartered management accountant and his previous experience as Group Finance Director of Bodycote plc. and before that, Finance Director of Courtaulds Coatings (Holdings) Limited. He also had direct experience as Chair and member of the Audit Committee of Luxfer Holdings plc. as well as Audit Committee Chair of Renold plc.

In the case of Ms. Arnold, the Board made this determination based on Ms. Arnold’s qualifications and previous experience as Chief Financial Officer of Houghton International, Chief Financial Officer of Physiotherapy Associates and Chief Financial Officer of Tyco Flow Control and before that Chief Financial Officer of GE Silicones General Electric. Ms. Arnold also has experience as Audit Committee Chair at FreightCar America Inc.

**The Audit Committee comprised at least three members at all times during 2024, as required by our Audit Committee Charter.

Key Responsibilities:

•identify individuals qualified to become Board members consistent with criteria approved by the Board

•recommend to the Board the persons to be nominated by the Board for election as Directors at the Annual Meeting

•develop and recommend to the Board a set of corporate governance and compliance principles

•oversee the self-evaluation of the Nominating, Corporate Governance and Sustainability Committee, the self-evaluation of the Board and management’s evaluation of the Board

•monitor the Company’s continued compliance with Company policies and applicable rules and regulations by reviewing reports from the Legal Compliance Department that cover training, results of audits and policy updates

•monitor the work of the Legal Compliance Department in establishing observance of Innospec’s governance principles; and

•help shape the corporate governance policy of the Company by promoting legal compliance by the Company.

•Act as the Board’s conduit in environmental and social matters by interfacing with the Executive Team ESG Steering Group regarding communication and reporting plans and risk and otherwise helping the Board in its promotion of environmental and social factors and the satisfaction of associated obligations.

•The Nominating, Corporate Governance and Sustainability Committee operates under a written Nominating, Corporate Governance and Sustainability Committee Charter that governs its duties and standards of performance. A current copy of the Nominating, Corporate Governance and Sustainability Committee Charter is available on our website under “Corporate Governance”: https://innospec.com/about-us/corporate-governance/.

Nominating,
Corporate
Governance and Sustainability
Committee

Current Members:

Claudia P. Poccia (Chair)
Since: Member since July 2019, Chair since May 2020

David F. Landless
Since: May 2020

Elizabeth K. Arnold
Since: February 2025

Leslie J. Parrette:
Since: January 2022

Independence:
All current members of
the Nominating,
Corporate Governance, and Sustainability
Committee
are independent.

Board and Committee Self-Evaluations

Each year, the Nominating, Corporate Governance and Sustainability Committee oversees the Board, Committee and Director self-evaluation process.

The annual evaluation process is as follows:

Stockholder Engagement

In 2024 Innospec participated in five investor conferences and two non-deal-roadshows. This included multiple engagements with the majority of our largest active stockholders, representing in the aggregate more than one-third of our outstanding stock, during the year. Where beneficial, we continued to leverage virtual meeting tools.

The Company was represented by a minimum of two, and often three of the senior executives comprising the CEO, CFO and Senior Vice President, Corporate Development and Investor Relations. During the year, several updated versions of our investor presentation were produced covering business performance, strategy and financial management of the Company. Concurrent with each update, the presentation was uploaded to the Company’s website so that all investors had access to the same information.

The Company’s senior management team also engaged with investors and analysts in the period soon after the release of quarterly results to discuss those quarterly results.

Along with business performance, market conditions, capital allocation plans and strategy, other issues were discussed as raised by investors.

SUSTAINABILITY

Our Strategic Approach to Sustainability

As a global specialty chemical company, Innospec understands that the way we conduct our business is essential to the long-term success of Innospec. Our sustainability strategy is broken down into three key areas: Environmental, Social and Governance. We focus our actions in areas where we can have the most impact on the long-term future of our business. We believe this approach reflects our stakeholders’ priorities and demonstrates our commitment to striving to grow our business in what we believe to be a sustainable and socially responsible manner.

Sustainability Governance

Innospec’s sustainability governance structure features standalone sustainability teams for each of our businesses reporting into an Executive Sustainability Steering Group. The Executive Sustainability Steering Group comprises our CEO and senior business leaders and is responsible for developing, resourcing and making decisions on Innospec’s sustainability strategy, targets and objectives. This group meets and reports, on a quarterly basis, directly to our Board’s Nominating, Corporate Governance and Sustainability Committee who have oversight of sustainability strategy, objectives and progress. In addition to this, the full Board is briefed annually on our sustainability progress, strategy, and future direction. Our VP Global Regulatory Compliance and Sustainability, is responsible for leading Innospec’s sustainability strategy, implementation and continued execution. Our dedicated sustainability teams for our three business units, focus on specific issues relevant to their customers and markets.

Sustainability Performance Highlights from our 2024 Sustainability Report

Working towards the UN Sustainable Development Goals

Innospec recognizes that the private sector plays an important role in advancing the United Nations Sustainable Development Goals (“SDGs”) which address the world’s most pressing economic, social and environmental challenges. In 2024, we conducted a review of our activities, mapping them against the SDGs and found that we directly contribute to 14 of the goals. Of these we have identified five that align most closely to our operations; Quality Education, Affordable and Clean Energy, Decent Work and Economic Growth, Responsible Consumption and Production, and Life on Land. The UN SDGs have been used to guide our materiality assessment and the evolution of our Sustainability strategy and agenda. We will continue to evolve our existing sustainability initiatives to maximize our contribution.

Corporate Social Responsibility Reporting

As part of Innospec’s ongoing commitment to being open and transparent around our performance, our latest 2023 Sustainability Report was independently assessed to a moderate level of assurance, to the globally recognized AccountAbility’s AA1000 Assurance Standard 2018.

The 2023 Sustainability Report, along with further information on our Sustainability program and performance, is available at https://innospecsustainability.com, but does not constitute part of, and is not incorporated by reference into, this Proxy Statement.

HUMAN CAPITAL MANAGEMENT

Core Values & Culture

Our core values are:

Responsible Growth: Financial stability and growth are essential to maintain our goal of making a positive contribution towards a more sustainable future. Generating economic benefits for our employees, stockholders, and local communities — encouraging ongoing innovation in our product portfolio alongside excellent customer service, financial stability and responsible growth, will allow our business to be competitive and sustainable.

Caring for People: We strive to create a safe and caring culture where our employees are supported and encouraged to make positive contributions. Our continued success depends on keeping people safe, promoting a healthy lifestyle, protecting human rights, improving education, training and maintaining good relations with our neighbors.

Conserving & Protecting the Environment: We aim to use resources as efficiently as practicable and minimizing the impact of our operations on the environment. We look to supply safe, sustainable products, designed to meet the needs of society now and in the future while minimizing their environmental impact.

Leading by Example: We understand that honest, ethical and transparent conduct is vital to our success and reputation. Every employee plays an essential part in complying with local and national laws, rules and regulations. We uphold a high standard of corporate and business integrity across all of our activities.

At Innospec, we encourage our people to aspire to a culture that is:

Confident

We know what is expected of us and take responsibility for our own workload. We assume responsibility for making decisions and are flexible in our dealings with people. We take additional responsibility to meet customer needs and enhance performance.

Informed

We take pride in being good at what we do and actively seek to enhance our knowledge and skills to help improve performance. We use our expertise co-operatively to meet customer needs and enhance our performance. We respect each other and listen carefully to understand others’ points of view.

Clear

As an organization, we are open and transparent. We encourage and welcome feedback and we support people to deal with any unwelcome messages.

Innovative

Our people are forward thinking and inspired. We enjoy challenges and encourage new ideas. We seek continual improvement, and care about treating people well through periods of change.

Dynamic

We are performance driven, enthusiastic and quick to respond. We set clear targets and objectives and take satisfaction in achieving them. We want to be part of a successful team and business, and we make decisions quickly and implement them.

Employee Engagement

Attracting Talent. We believe our hardworking team of employees is our greatest asset. We employ approximately 2,450 people across 22 countries, and we believe that the skills, commitment and enthusiasm of our employees helps us to deliver long-term growth for investors.

In addition to our Company wide performance incentive plans, we encourage our employees to share in the long-term success of our Company with incentive programs, such as our Global Sharesave plan. This plan gives employees the opportunity to participate in a savings plan linked to an option to buy shares in Innospec at a discount and, therefore, benefit from any growth in the share price over the savings period. We also provide a range of other benefits in line with the market practice in each location we operate in, including insurance and pension arrangements.

Performance Management Framework. We conduct an annual performance management process across the organization. Together with their line managers, employees agree upon annual objectives, and, at the end of the year, review with their line manager their performance against those objectives and their overall performance. The results of each annual performance review affect performance bonus amounts, pay, adjustment and career advancement decisions.

Senior Leadership Communications and Transparency. We actively seek opportunities for regular engagement and communication by our CEO and other Senior Executives with our broader employee population. Communications are through a variety of means including written communications, webcasts and conference calls. For example, we hold a CEO Call at least once a year, during which the CEO and CFO discuss current issues and developments in the business, including a Q&A session answering questions raised by employees. The CEO Call is accessible to all employees across the Company. In addition to the CEO Calls, each financial quarter, following the quarterly financial results announcement, the CEO and CFO provide a written review of the financial results to all employees.

Diversity and Inclusion

Innospec aims to attract and retain the best people by making employment decisions that are based on merit, performance, ability, and contribution to the Company. As part of our Global HR Policies, our diversity and equal opportunities policy means that current and prospective employees receive equal opportunities irrespective of sex or gender (including pregnancy, childbirth and pregnancy-related conditions), gender identity or expression, genetic information, marital status, sexual orientation, race, color, ethnic or national origin, age, disability, religion, creed or belief or any other characteristic protected by applicable local legislation.

Health and Safety

Objectives. We prioritize the safety of employees, communities and everyone involved in the manufacture, use or disposal of our products. We set high standards for process and occupational safety, which is managed by our network of Safety, Health and Environment (“SHE”) professionals throughout the business. SHE is a top priority for Innospec with our three core objectives being:

Leadership. The Company periodically reviews the Corporate SHE structure and organization so that we have the optimum resources and correct approach. We strive to embed SHE in our culture by having leadership that comes from executive management. Our Responsible Care Executive Committee (known as RESPECT) comprises members of the senior leadership team and is led by the CEO. RESPECT is responsible for setting the group’s SHE policies and objectives across the global business. It also monitors ongoing performance in these areas throughout the year. Through this structure, we have established a strong culture of safety within our organization. The RESPECT committee reports to the Board and conducts a major review of objectives and performance annually alongside quarterly interim reviews.

Training. Training is an essential part of our health and safety strategy. To minimize the risk of accident or injury, we give our employees the information they need, delivered effectively and at the appropriate time. Our ongoing training programs demonstrate our commitment to targeting zero accidents, making sure that safety is always front of mind and that we continually raise standards.

Every year, employees across our sites take part in a variety of site-specific training courses to enable them to be competent and safe in their roles.

A copy of the Company’s Safety, Health and Environment Policy can be found on the “Sustainability” section of the Company’s website at https://innospecsustainability.com, but does not constitute part of, and is not incorporated by reference into, this Proxy Statement.

Development and Training

As an organization, we are committed to making Innospec a great company to work for and we invest, as appropriate, in the development of our employees to meet this ambition.

Our employees are offered both internal and external training, where appropriate, to support their continued development and to meet the needs of our business. Where relevant, we support our employees’ ongoing professional training and development to encourage their progression within our business.

The Board is also actively involved in reviewing and approving executive compensation, selections and succession plans so that we have leadership in place with the requisite skills and experience to deliver results the right way. The CEO periodically provides the Board with an assessment of each Senior Executive that has the potential to be a successor for the CEO position, as well as perspectives on potential candidates for other senior management positions.

Further information on our human capital management initiatives is available in our annual Environmental, Social & Governance Report, available online in the “Sustainability” section of the Company’s website at https://innospecsustainability.com, but does not constitute part of, and is not incorporated by reference into, this Proxy Statement.

PROPOSAL 1 – ELECTION OF THREE CLASS III DIRECTORS

(Item 1 on the Proxy Card)

The first proposal to be voted on at the meeting is the election of three Class III Directors. The directors elected at this meeting will serve until the 2028 Annual Meeting of Stockholders. The Board has nominated Mr. David F. Landless, Mr. Lawrence J. Padfield and Mr. Patrick S. Williams, current Class III Directors, whose terms expire at the upcoming Annual Meeting of Stockholders, for election to the Board.

The below chart includes this year’s nominees included in Proposal 1, along with their age, tenure, principal occupation and committee membership:

If a nominee becomes unable or unwilling to accept nomination or election, the Board will either select a substitute nominee or reduce the size of the Board. If you have submitted a proxy and a substitute nominee is selected, your shares will be voted for the election of the substitute nominee.

The Board has no reason to believe that any nominee would be unable or unwilling to serve if elected.

According to the Bylaws and Corporate Governance Guidelines, the Nominating, Corporate Governance and Sustainability Committee recommended to the Board that the Board submit the Class III Directors to the vote of stockholders. The above-named nominees will be elected to the Board on a plurality of the votes of the shares present or represented by proxy at the meeting and entitled to vote.

Our “Majority Vote” Director Resignation Policy

According to the procedure set out in our Corporate Governance Guidelines, in an uncontested election, any nominee for director (including an incumbent director) who receives a greater number of votes “withheld” from his or her election than votes “for” such election, the nominee must offer his or her resignation promptly to the Board following certification of the stockholder vote. Upon receipt of the resignation, the Nominating, Corporate Governance and Sustainability Committee will consider the resignation offer and recommend to the Board whether to accept it. The Board will act on the Nominating, Corporate Governance and Sustainability Committee’s recommendation within 120 days following certification of the stockholder vote. The Nominating, Corporate Governance and Sustainability Committee and the Board may consider any factors they deem relevant in deciding whether to accept a director’s resignation. Thereafter, the Company will promptly disclose the Board’s decision whether to accept the director’s resignation offer (and the reasons for rejecting the resignation offer, if applicable) in a Current Report on Form 8-K furnished to the SEC. This resignation policy does not apply to contested director elections.

INFORMATION ABOUT THE INNOSPEC INC. BOARD

Innospec believes that having an independent, active, and engaged Board is key to our success. We also believe that new perspectives and ideas are critical to a forward-looking and strategic Board. Our goal is to seek a balance between new points of view and the valuable experience and knowledge that longer-serving directors bring to the boardroom. We believe that we have assembled a Board with varied backgrounds, experiences and viewpoints who understand our markets, customers and employees. The Board seeks a mix of directors with qualities that result in a well-rounded, diverse Board that thinks critically and also functions effectively by reaching informed decisions. Our Directors have a diversity of experience and a variety of skills, education, qualifications and viewpoints that strengthen the Board’s ability to carry out its oversight role of the Company and effectively represent the interests of stockholders.

Since 2020 and as at the date of this Proxy Statement:

•Both new Directors are independent

•Both new Directors are diverse

Current Board and Committee fast facts:

Board Skills Matrix

The table below is a summary of the range of attributes and experiences that each Director currently in office brings to our Board. As it is a summary, it is not intended to be a complete description of all of the skills and attributes that each of our Board members possesses.

Additional information about the background, business experience and other matters of each nominee and director who will continue in office following the Annual Meeting of Stockholders, as well as a description of how each individual’s experience qualifies him or her to serve as a director of the Company is provided under the heading “Director Biographies” beginning on page 35.

Director Biographies

The following is biographical and other information about our current Directors, including the nominees for election at the Annual Meeting.

Class I Directors

Ms. Poccia is CEO of Grace De Monaco, a wholly owned subsidiary of The Princess Grace Foundation-USA. Grace de Monaco is the first global luxury brand for good and all revenues from the sale of Grace de Monaco products support emerging artists in theater, dance, and film through The Princess Grace Awards program. She continues to serve as CEO of DragonflySage, a strategic consultancy she founded to advise luxury lifestyle and beauty brands, since 2018, and has over 30 years’ experience in the beauty industry. Ms. Poccia also co-founded IdeavationLabs LLC, a beauty incubation platform company, where she served as CEO from 2020- 2021. Previously, Ms. Poccia was the Chief Marketing Officer and Head of International Business Development of bareMinerals for Shiseido Americas Company, a beauty company, having previously served as President/CEO of Gurwitch Products from 2011 to 2015. Prior to that, Ms. Poccia was Global President, Beauty for Avon Products Inc. from 2009 to 2011, having joined them in 2005 as President for the U.S. beauty business. From 1994 to 2005, Ms. Poccia worked for Estee Lauder Companies Inc., in a number of senior executive and business roles including President of Stila Cosmetics and VP of Business Development for the Estee Lauder brand. Her early career included seven years at Avon Products Inc., where she held a number of roles in sales. Ms. Poccia has been Chairman of Luxie Holdings Inc., a beauty products company since May 2019, a Board member of Fashion Group International, a non-profit organization focusing on the fashion industry, since 2018 and is also a board member of Blue Mistral, LLC. Ms. Poccia is recognized as a leader in the beauty industry and was named one of the Top 50 Most Influential People in Beauty by Beauty Inc. She has been the recipient of several awards in the industry including the Cosmetic Executive Women Achiever Award and Women’s Wear Daily Beauty Biz Award for Innovative Marketer.

Key Attributes, Experience and Skills:

Ms. Poccia has an in-depth knowledge of the international personal care industry, particularly the beauty sector and has held several senior positions during her career. She brings industry knowledge and marketing expertise to the Company.

For additional detail see our Board Skills Matrix on page 33.

Ms. Arnold has served as an independent Director of FreightCar America, Inc., a railroad freight car manufacturer and parts supplier, since 2019, serves as its audit committee chairperson and serves on the nominating and corporate governance committee and compensation committee. From October 2014 to 2019, Ms. Arnold served as the Senior Vice President, Chief Financial Officer and Treasurer of Houghton International, a specialty chemical company with international operations where she also had responsibility for the information technology department,. From October 2012 to April 2014, Ms. Arnold served as the Chief Financial Officer of Physiotherapy Associates where she also had responsibility for the information technology department. Prior to that, Ms. Arnold served as the Chief Financial Officer of Tyco Flow Control from April 2010 to September 2012, having previously served as the Vice President, Corporate Financial Planning & Analysis at Tyco International. Earlier in her career, Ms. Arnold served in numerous roles, including executive leadership positions, for GE, a global high-tech industrial company with products and services ranging from aircraft engines, power generation and oil and gas production to medical imaging.

Key Attributes, Experience and Skills:

Ms. Arnold has an in-depth knowledge of the chemical industry and has held several senior management positions during her career. She brings industry knowledge and financial expertise and experience in information technology, including cyber security, to the Company.

For additional detail, see our Board Skills Matrix on page 33.

Class II Directors

Mr. Blackmore serves as Non-Executive Chairman of the Company. Mr. Blackmore was most recently the Senior Vice President, Marketing and Product Supply for Sinclair Oil Corporation, one of the largest independent oil companies in the U.S. Sinclair recently merged with Holly Frontier of Dallas, TX, which is now known as HF Sinclair Corporation. Mr. Blackmore served on its board of directors until his retirement in 2009, having previously held a number of senior marketing roles within that company. He was also Chairman of Sinclair Marketing Inc., which is Sinclair Oil Corporation’s convenience store business. Before joining Sinclair in 1995, Mr. Blackmore was with Kerr- McGee Refining Corporation for twenty-six years, progressing through a variety of accounting, marketing and general management positions, ultimately serving as General Manager, Branded Marketing for three years. Mr. Blackmore has a Bachelor of Science degree in Business Administration from Panhandle State University in Oklahoma.

Key Attributes, Experience and Skills:

Mr. Blackmore has an in-depth knowledge of the chemical industry, particularly the oil sector and has held several senior positions during his career. He brings industry knowledge, financial and marketing expertise to the Company.

For additional detail, see our Board Skills Matrix on page 33.

Mr. Parrette is currently the President of One Page Thinking, a data visualization company he founded in 2003. For more than 20 years, he has served as General Counsel and Chief Compliance Officer for several public companies in domestic and international markets across a variety of industries, including energy trading, electric and gas utilities, natural gas pipelines, aluminum manufacturing, and electrical product distribution. In 2005, he joined Novelis Inc., a subsidiary of Hindalco Industries Ltd., an aluminum rolling and recycling company serving as Senior Vice President, General Counsel, Compliance Officer, and Corporate Secretary until 2020. Prior to this, in 2000, Mr. Parrette joined Aquila, Inc., an international electricity and natural gas utility company, as Senior Vice President, General Counsel, and Secretary. In 1992, he joined Blackwell Sanders, LLP as a Senior Partner and Chair of the law firm’s International Committee. He is a member of the Nominating, Corporate Governance and Sustainability Committee and the Compensation Committee. Mr. Parrette has a Bachelor of Arts degree in Sociology from Harvard College and a J.D. degree from Harvard Law School.

Key Attributes, Experience and Skills:

Mr. Parrette brings significant legal, compliance and governance expertise to the Board, which is invaluable in a heavily regulated industry in which the Company operates.

For additional detail, see our Board Skills Matrix on page 33.

Class III Directors

Mr. Landless was the Group Finance Director for Bodycote plc, a U.K. listed company, which provides thermal processing services globally for a wide range of industries including aerospace, automotive, oil and gas and construction, for over 17 years until December 2016. From March 2013 to June 2022, he was a Non-Executive Director for Luxfer Holdings plc; a NYSE listed global materials technology company, and was their Audit Committee Chair until May 2019, when he was appointed Chairman of the Board, which role he relinquished in March 2022 In January 2017, he was appointed a Non-Executive Director of Renold plc, a U.K. listed global manufacturer of specialist industrial chain and machinery transmissions and also was a member of and chaired their Audit Committee until August 2021, from which date he became Chairman of the Board. He is also a Non-Executive Director of Ausurus Group Ltd the holding company of European Metal Recycling (EMR), a large private scrap metal recycling company and was appointed to this role in June 2017. Mr. Landless’ early career includes fourteen years with Courtaulds plc, where he held a number of finance roles, ultimately serving as the Finance Director of Courtaulds Coatings (Holdings) Limited from 1997 to 1999. Mr. Landless is a Chartered Management Accountant and has a Bachelor of Science degree in Management Sciences from the University of Manchester Institute of Science and Technology in the U.K.

Key Attributes, Experience and Skills:

Mr. Landless brings significant financial expertise and knowledge of financial reporting with his wealth of experience as a Finance Director and as a Non-Executive Director during his career to date. Mr. Landless also has substantial international experience in the chemicals, paint and engineering sectors.

For additional detail, see our Board Skills Matrix on page 33.

Mr. Padfield was a principal and Executive Vice President of Blackline Partners LLC, a closely held private equity and midstream logistics and terminal development company, where he served from 2014 to 2019. He continues to hold the position as the Board Chairman of CAP Technologies, a private U.S. company that has developed and markets a ground-breaking technology for cleaning and coating wire, rebar and plate steel, a position he has held since 2018. Prior to forming Blackline Partners, Mr. Padfield was a founding partner and Vice President of U.S. Development Group LLC, an industry leading biofuel and crude oil terminal development company. Mr. Padfield’s early career includes eighteen years at Shell Oil Company where he held a number of roles in marketing, engineering and product supply, ultimately serving as the Business Development and Acquisitions Manager for their terminal and pipeline business. Mr. Padfield has a degree in Civil Engineering from the University of Missouri.

Key Attributes, Experience and Skills:

Mr. Padfield has almost thirty years’ experience in the oil and gas logistics industry, commercial marketing and business development, and his wealth of knowledge in this sector is a valuable resource to the Company.

For additional detail, see our Board Skills Matrix on page 33.

Mr. Williams has served as President and Chief Executive Officer of the Company since his appointment to this position on April 2, 2009 and as a Director of the Company since May 11, 2009. Prior to holding this position, Mr. Williams was Executive Vice President and President, Fuel Specialties of the Company from 2005 to 2009 and in addition assumed responsibility for the global Performance Chemicals business in 2008. He held a number of senior management and sales leadership positions in Innospec Fuel Specialties LLC, including acting as the Chief Executive Officer of this business from 2004 to 2009. Before joining the predecessor company of Innospec Fuel Specialties LLC, Starreon Corporation, in 1993, Mr. Williams established a number of businesses and currently holds equity positions in a small exploration and oil production company and a real estate business. Since February 2020, Mr. Williams has served as a Non-Executive Director of AdvanSix Inc., and as a member of its Compensation and Leadership Development Committee and Chair of the Nominating and Corporate Governance Committee.

Key Attributes, Experience and Skills:

As the only management representative on the Board, Mr. Williams provides an insider’s perspective in Board discussions about the business and strategic direction of the Company. Mr. Williams has particular experience in the Fuel Specialties, Performance Chemicals and Oilfield Specialties businesses, and brings a wealth of knowledge to the Company.

For additional detail, see our Board Skills Matrix on page 33.

DIRECTOR COMPENSATION

Elements of Director Compensation:

In 2024, the non-employee director’s compensation was generally a flat annual fee based on the following arrangement:

Annual Retainer:

•An annual retainer of $175,000, paid quarterly, to the Chairman of the Board.

•An annual retainer of $90,000, paid quarterly, for all other NEDs.

Additional Annual Retainers for Board Committee duties as follows:

•An additional annual retainer of $14,000, paid quarterly, for the Chair of the Compensation Committee.

•An additional annual retainer of $20,000, paid quarterly, for the Chair of the Audit Committee.

•An additional annual retainer of $11,000, paid quarterly, for the Chair of the Nominating, Corporate Governance and Sustainability Committee.

•An additional annual retainer of $5,000, paid quarterly, to the members of the Audit Committee.

•No additional daily fees for attendance at Board or Committee meetings or calls, except as provided below.

In addition to the compensation arrangements described above:

•NEDs may receive an additional daily fee of $2,000 for additional days provided at the specific request of the CEO.

•Each NED is entitled to reimbursement for any reasonable out-of-pocket expenses incurred in connection with travel to and from, and attendance at, meetings of the Board or its Committees and related activities.

Annual Equity grant:

•Each NED also receives an annual grant of equity under the Innospec Inc. Long-Term Incentive Omnibus Plan (the “Omnibus Plan”) in February of each year, equal to $97,500, based on the closing stock price for Company stock on the date prior to grant. In February 2024, such awards were equity awards in the form of restricted stock units granted at zero cost. Restricted stock units vest after three years.

•The value of the restricted stock units for the Directors included in the “Director Compensation” table, under the column headed “Stock Awards”; the table discloses the grant date fair value of full value awards made under the Omnibus Plan. The value of the restricted stock units is determined using the number of stock awarded and the grant date fair value for each stock awarded are calculated using the Black-Scholes model, with reference to the underlying stock price, volatility of the Company’s stock price, risk free rate and expected dividend yield. For full value awards with additional characteristics, such as vesting criteria linked to stock market indices or stock price performance, a Monte Carlo simulation is used to model the range of potential outcomes. For further information on the assumptions underlying these grant date fair values refer to Note 18 of the Consolidated Financial Statements contained in the Company’s Annual Report on Form 10-K for the year ended December 31, 2024.

Director Stock Ownership Guidelines

The Compensation Committee has determined that there should be a minimum stockholding requirement for the NEDs. All NEDs are required to acquire and hold stock valued at the equivalent of two times their annual retainer. These stock ownership levels must be reached within five years of appointment. At the end of 2024, the stockholding for all the NEDs was greater than 200% of the annual retainer.

DIRECTOR COMPENSATION FOR FISCAL 2024

The number of unexercised options and unvested full value equity awards outstanding as of February 15, 2025 for each NED is detailed in the table below:

WHO OWNS OUR STOCK? INFORMATION ABOUT OUR COMMON STOCK OWNERSHIP

The table “Stock Ownership of Directors and Executive Officers as of February 15, 2025, sets out information with regard to the Directors of the Company, our Executive Officers who are named in the “Summary Compensation Table” which appears later in this Proxy Statement (“Named Executive Officers” or “NEOs”), and all current Directors and Executive Officers of the Company as a group.

The table “Beneficial Owners at Fiscal Year-End 2024” sets out certain information with respect to the beneficial ownership of the Company’s Common Stock as of December 31, 2024 by holders of more than 5% of the Company’s outstanding Common Stock.

As of December 31, 2024, excluding treasury stock, there were 25,117,922 shares of Common Stock outstanding. To the knowledge of the Company, each stockholder listed in the tables below has sole voting and investment power with respect to the stock indicated as beneficially owned, unless otherwise indicated in a footnote. Unless otherwise indicated, the business address of each person is the Company’s corporate address.

STOCK OWNERSHIP OF DIRECTORS AND EXECUTIVE OFFICERS AS OF FEBRUARY 15, 2025

The following table sets out the amount of our Common Stock beneficially owned by each of the Directors, the CEO, the CFO and the other NEOs of the Company:

Footnotes to “Stock Ownership” table:

(*)Less than 1%

(1)In the case of Mr. Blackmore this figure includes shares held by ‘The Milton & Janet Blackmore Trust’

(2)The “Right to Acquire” column in the table represents the number of shares subject to options exercisable or restricted stock units subject to vesting, both within 60 days following February 15, 2025

PRINCIPAL BENEFICIAL OWNERS AT FISCAL YEAR END 2024

This table lists all entities that are beneficial owner of more than 5% of Innospec Inc. common stock:

Based on a review of filings with the SEC, the Company is unaware of other holders of more than 5% of the outstanding shares of Innospec Inc. Common Stock.

Notes:

(1)According to a Schedule 13G/A dated January 22, 2024, BlackRock, Inc. has sole voting power over 3,933,028 shares and sole dispositive power over 3,974,345 shares.

(2)According to a Schedule 13G/A dated February 13, 2024, The Vanguard Group has shared voting power over 41,965 shares, sole dispositive power over 2,885,671 shares, shared dispositive power over 68,222 shares and beneficially holds 2,953,893 shares.

(3)According to a Schedule 13G/A dated January 10, 2024 and filed jointly on behalf of Allspring Global Investments Holdings, LLC, Allspring Global Investments, LLC and Allspring Funds Management, LLC, Allspring Global Investments Holdings, LLC has sole voting power over 2,190,515 shares, sole dispositive power over 2,337,644 shares, and beneficially held shares of 2,337,6442. Allspring Global Investments, LLC has sole voting power over 529,931 shares, sole dispositive power over 2,335,589 shares and beneficially owns 2,335,589 shares and Allspring Funds Management, LLC has sole voting power over 1,660,584 shares, sole dispositive power over 2,055 shares, and beneficially owns 1,1,662639 shares.

(4)According to a Schedule 13G/A dated February 12, 2025, Wasatch Advisors LP has sole voting power over 1,200,102 shares and sole dispositive power over 1,580,115 shares.

Delinquent Section 16(a) Reports

Section 16(a) of the Exchange Act requires our executive officers, directors and “beneficial owners” of more than 10% of our common stock to file stock ownership reports of changes in ownership with the SEC. Based upon a review of those reports and written representations from the reporting persons, we believe that each of the Company’s officers, Directors and beneficial owners of more than 10% of the Common Stock complied with all Section 16(a) filing requirements applicable to them during fiscal 2024, except that one Form 4 for David Jones, for a sale of shares on March 1, was filed one day late, on March 6, 2024 due to administrative error, and Form 4’s for each of Corbin Barnes and Trey Griffin for sales of shares on November 18, 2024, were filed late on January 30, 2025 due to administrative error.

Equity Compensation Plans

The following table summarizes information, as of December 31, 2024, relating to our current equity compensation plans approved by security holders, pursuant to which grants of options, full value options, restricted stock, restricted stock units or other rights to acquire stock have been granted from time to time under the Company Stock Option Plan (“CSOP”), Performance Related Stock Option Plan (“PRSOP”), Non-Executive Directors Stock Option Plan (“NEDSOP”) and Omnibus Plan.

The CSOP, PRSOP and the NEDSOP expired in May 2018 and no further options were granted under these plans after that date, although outstanding options granted under such plans remain exercisable until their respective expiration dates. Options and full value awards were granted under the Omnibus Plan. This plan provides for options exercisable for Common Stock and full value awards, such as restricted stock units and performance stock units that are settled in Common Stock, as well as cash incentive awards, which are payable in cash based on stock price.

We do not have any equity compensation plans that have not been approved by stockholders. Additional information about the CSOP, PRSOP and Omnibus Plan can be found in the Compensation Discussion and Analysis section of this Proxy Statement.

PROPOSAL 2 – ADVISORY APPROVAL OF INNOSPEC INC.’S EXECUTIVE COMPENSATION

(Item 2 on the Proxy Card)

Section 14A of the Exchange Act enables our stockholders to vote to approve, on an advisory (non-binding) basis, the compensation of our Named Executive Officers (NEOs), as disclosed in this Proxy Statement including the Compensation Discussion and Analysis, the Compensation Tables and related material, in accordance with the compensation disclosure rules of the SEC. In accordance with Section 14A of the Exchange Act, we are offering to our stockholders a non-binding, advisory vote on 2024 compensation for the NEOs, including the compensation of our CEO.

We believe that our executive compensation programs are structured in the best manner possible to support the Company and our business objectives. We are asking our stockholders to indicate their support for our NEO compensation as described in the Compensation Discussion and Analysis section and the compensation tables and related narrative disclosure. This proposal, commonly known as a “say-on-pay” proposal, gives our stockholders the opportunity to express their views on our NEOs’ compensation. This vote is not intended to address any specific item of compensation, but rather the overall compensation of our NEOs and the philosophy, policies and practices described in this Proxy Statement. Accordingly, we will ask our stockholders to vote “FOR” the following resolution at the Annual General Meeting:

“RESOLVED, that the compensation paid to the Company’s Named Executive Officers, as disclosed pursuant to the compensation disclosure rules of the SEC, including the Compensation Discussion and Analysis, compensation tables and related material disclosed in this Proxy Statement is hereby APPROVED.”

As an advisory vote, this proposal is not binding upon the Company. However, the Board will consider that the stockholders have approved executive compensation on an advisory basis if this proposal receives the affirmative vote of a majority of the votes present or represented by proxy. The Compensation Committee values the opinions that stockholders express through their votes and will consider the outcome of the vote when making future compensation decisions.

PROPOSAL 3 – RATIFICATION OF THE APPOINTMENT OF THE COMPANY’S INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM

(Item 3 on the Proxy Card)

The Board is seeking ratification of the appointment of PwC at the Annual Meeting in respect of the 2025 fiscal year.

The Audit Committee has appointed the accounting firm PwC to serve as the Company’s independent registered public accounting firm with respect to the 2025 fiscal year, to audit the consolidated financial statements of the Company for the fiscal year ending December 31, 2025 and to perform other appropriate audit related services. PwC has served as the Company’s independent registered public accounting firm since May 24, 2019.

Principal Accountant Fees and Services

Aggregate fees for professional services rendered to the Company by PwC and other global PwC member firms for the fiscal years 2024 and 2023 were:

Note 1:The aggregate fees included in Audit fees are fees billed for the fiscal years for the audits of the consolidated financial statements of the Company, statutory and subsidiary audits, and review of documents filed with the SEC. The aggregate fees included in each of the other categories are fees billed in the respective fiscal years.

Audit Committee Pre-Approval Policies and Procedures

The Audit Committee pre-approves all audit and permitted non-audit services provided by the Company’s independent registered public accounting firm. The Audit Committee may delegate pre-approval authority to the Audit Committee Chairman, provided all such delegated pre-approval decisions are reported to the Audit Committee at its next regularly scheduled meeting. General pre-approval of certain audit, audit-related and tax services, which are detailed as to type of service, is granted by the Audit Committee at each quarterly meeting. The Audit Committee subsequently reviews fees that are paid for such pre-approved services. Specific pre-approval is required for all other services that are requested of our independent registered public accounting firm. These requests are reviewed quarterly, and the status of all such requests and services is reviewed with the Audit Committee.

In fiscal years 2024 and 2023, the Company did not make any payments to its independent registered public accounting firm for which the de minimis exception was used.

AUDIT COMMITTEE REPORT

The Board has adopted a written Audit Committee Charter. As part of fulfilling its responsibilities, the Audit Committee:

1.held meetings with the Company’s Business Assurance function and the independent registered public accounting firm, both in the presence of management and privately to discuss the overall scope and plans for the respective audits, the results of the audits, the evaluations of the Company’s internal controls and the overall quality of the Company’s final reports;

2.reviewed and discussed the audited consolidated financial statements for fiscal year 2024 with management and the independent registered public accounting firm;

3.discussed with the independent registered public accounting firm the matters required to be discussed by the applicable requirements of the Public Company Accounting Oversight Board and the SEC; and

4.received the written disclosure and the letter required by applicable requirements of the Public Company Accounting Oversight Board Rule regarding the independent accountant’s communications with the Audit Committee concerning independence, and discussed that firm’s independence with representatives of that firm. The Audit Committee has also considered whether PwC’s provision of non-audit services to the Company is compatible with its independence.

Based upon these reviews and discussions, the Audit Committee has recommended to the Board, and the Board has approved, that the Company’s audited consolidated financial statements be included in the Company’s Annual Report on Form 10-K for the fiscal year ended December 31, 2024 and filed with the SEC.

No portion of this Audit Committee Report shall be deemed to be incorporated by reference into any filing under the Securities Act of 1933, as amended (the “Securities Act”), or Securities Exchange Act of 1934, as amended (the “Exchange Act”), through any general statement incorporating by reference in its entirety this Proxy Statement in which this report appears, except to the extent that the Company specifically incorporates this report or a portion of it by reference. In addition, this report shall not be deemed to be filed under either the Securities Act or the Exchange Act.

The foregoing report has been approved by all members of the Audit Committee.

DAVID F. LANDLESS, Chair
MILTON C. BLACKMORE
ELIZABETH K. ARNOLD

INFORMATION ABOUT OUR EXECUTIVE OFFICERS

Mr. Cleminson serves as Executive Vice President and CFO to the Company, having joined the Company in February 2002. Prior to this appointment, Mr. Cleminson was Financial Controller for the Fuel Specialties and Performance Chemicals business units within the Company. He joined the Company from BASF plc. where, between 1999 and 2002, he served as Financial Controller of their Superabsorbents division. Previously, he worked as an accountant in private practice since 1989.

In May 2022, Mr. Cleminson was appointed as a Non-Executive Director to the Board of Surface Transforms plc, which is a UK listed manufacturer of carbon ceramic brake discs. He chairs their Audit Committee and is a member of their Renumeration and Nomination Committee.

As previously disclosed, Dr. Boon will be retiring from his position effective March 31, 2025. Dr. Boon was appointed as Chief Operating Officer effective November 2015. In this role, Dr. Boon has direct responsibility for the global Fuel Specialties business as well as an overseeing role with our global Performance Chemicals and Oilfield Specialties businesses and has a key role in the strategic development of Innospec. Prior to this appointment, Dr. Boon was the Executive Vice President, Business Operations from June 2009 and was responsible for all our businesses in Europe, Middle East and Africa (EMEA). Dr. Boon joined the Company in 1997 and has held various senior management positions covering most operational aspects of the business. He has over 30 years international experience in the specialty chemicals industry and previously held positions with Ciba Geigy and FMC in the U.S. and Europe. He has a PhD in Chemistry from Leicester University.

Mr. Griffin joined the Company in January 2005 and was appointed to the role of Senior Vice President, Human Resources in May 2021. Prior to this, he spent 4 years as Vice President, Human Resources for the Americas, having previously been Vice President, Operations for the Fuel Specialties business in the Americas. Before joining Innospec, he spent 15 years with Hewlett-Packard and Agilent Technologies working in a range of marketing and sales management roles. Mr. Griffin has a Bachelor of Science in Electrical Engineering from Colorado State University.

Dr. McRobbie serves as Senior Vice President and Chief Technology Officer of the Company, having joined the Company in January 2002. Between 1989 and 2001, he was Technical Director of A H Marks and Company Limited, a privately owned U.K. chemical company operating in agrochemical and specialty chemical markets. Prior to this, he worked in senior research and manufacturing roles for Seal Sands Chemical Co. Limited (a wholly owned subsidiary of the Hexcel Corporation based in California) and BTP plc. (now part of Clariant).