NOTICE OF ANNUAL MEETING OF SHAREHOLDERS

Items of Business

Our Board recommends you vote (1) FOR the election of the four nominees for directors named in this Proxy Statement, (2) FOR the compensation of named executive officers, (3) FOR the ratification of our independent auditors, and (4) FOR the approval of an amendment to our amended and restated certificate of incorporation allowing for officer exculpation consistent with Delaware law.

Your vote is important to us. You may vote via the Internet or by telephone, or if you requested to receive printed proxy materials, by signing, dating and returning your proxy card. If you are voting via the Internet or by telephone, your vote must be received by 11:59 p.m., Eastern Daylight Time, on Wednesday, May 22, 2024. For specific voting instructions, please refer to the information provided in this Proxy Statement, together with your proxy card or the voting instructions you receive by e-mail or that are provided via the Internet. If you received only a Notice of Internet Availability of Proxy Materials (“Notice of Internet Availability”) but you want a paper copy of the proxy materials to vote by mail, the Notice of Internet Availability includes instructions on how to request a paper copy of the proxy materials.

Whether or not you plan to attend the Annual Meeting online, we encourage you to promptly vote and submit your proxy via the Internet, by telephone or mail in advance of the meeting.

By order of the Board of Directors,

Alexander Dimitrief

Secretary

TABLE OF CONTENTS

Proxy Statement Summary

Annual Meeting of Shareholders

PROXY STATEMENT SUMMARY

Annual Meeting of Shareholders

		Time and Date		Thursday, May 23, 2024 at 9:00 a.m., Eastern Daylight Time.
		Place		The Annual Meeting will be a virtual meeting held online at www.virtualshareholdermeeting.com/SHC2024 via a live audio webcast. Please see “Virtual Annual Meeting” on the following page for additional information.
		Record Date		March 28, 2024
		Voting		Only shareholders of record at the close of business on the Record Date are entitled to receive notice of, and vote at, the Annual Meeting. Each share of common stock is entitled to one vote on each director nominee and one vote on each of the proposals.
		Attendance		Shareholders and their duly appointed proxies may attend the meeting.

Proposals and Board Recommendations

		1

Proxy Statement Summary

Information on Director Nominees

Information on Director Nominees

Information as of March 28, 2024 about the four nominees for Class I directors is set forth below. The Nominating and Corporate Governance (NCG) Committee reviewed the attributes and contributions of each of the nominees (without Dr. Wheadon’s involvement in the review and discussion of his attributes or contributions) and the Board recommends that shareholders vote FOR the election of each of these nominees.

Virtual Annual Meeting

Our Annual Meeting will be held exclusively online in a virtual format through a live audio webcast. You are entitled to participate in the Annual Meeting if you were a shareholder as of the close of business on March 28, 2024, the record date, or hold a valid proxy for the meeting.

To be admitted to the Annual Meeting at www.virtualshareholdermeeting.com/SHC2024, you must enter the 16-digit control number found next to the label “Control Number” on your Notice of Internet Availability, proxy card, or the voting instructions you receive by email. Shareholders may vote their shares electronically during the Annual Meeting through the virtual meeting platform; for more information on how to vote your shares, please see “Questions and Answers About the Proxy Statement and Our 2024 Annual Meeting of Shareholders” on page 75.

We are committed to ensuring that shareholders who attend our virtual Annual Meeting are afforded the same rights and opportunities to participate as shareholders receive at in-person meetings. Shareholders will be able to submit questions to Sotera Health’s management and directors during the Annual Meeting through the virtual meeting platform and we will answer as many properly submitted questions as possible.

The Annual Meeting webcast will begin promptly at 9:00 a.m., Eastern Daylight Time, on May 23, 2024. Online access and check-in will begin approximately 15 minutes prior to the 9:00 a.m. start time. We encourage you to access the meeting prior to the start time to allow ample time for check-in procedures. If you encounter any difficulties accessing the virtual meeting during check-in or during the meeting, please call 844-986-0822 (US) or 303-562-9302 (International). If there are any technical issues in convening or hosting the meeting, we plan to promptly post information to our investor relations website, https://investors.soterahealth.com/, including information on when the meeting will be reconvened.

Shareholder Engagement – 2023

SHAREHOLDER ENGAGEMENT – 2023

Shareholder feedback is a valuable input that we incorporate into Board, committee and management discussions. Our executive ESG Committee, which reports to our Chief Executive Officer (“CEO”) and provides regular reports to the NCG Committee, seeks opportunities to connect with our investors to discuss current and ongoing corporate responsibility trends and hear their views about governance policies and practices. In 2023, we reached out to institutional shareholders representing over 60% of shares not held by affiliates to solicit their feedback and to address shareholder questions. An external consultant also provides input on these discussions. Members of our executive ESG Committee participated in most of these meetings with institutional investors and the Chairs of the NCG and LDC Committees separately attended two of these meetings. These governance engagements are in addition to the discussions that our senior leadership and investor relations teams regularly have with institutional and other shareholders regarding governance and numerous other issues, which includes quarterly outreach to our largest shareholders after we release our earnings reports.

The following table highlights key themes that shareholders raised about governance matters during our engagement and how management and the Board address these issues. Shareholder feedback is shared with the NCG Committee and the Board.

Shareholder Engagement – 2023

		5

Board Composition, Nominations Process and Director Qualifications

Board Composition

BOARD COMPOSITION, NOMINATIONS PROCESS AND DIRECTOR QUALIFICATIONS

Board Composition

Our Board of Directors represents the interests of our shareholders and oversees our business and affairs. Our Board currently consists of eleven members, six of whom were members of the board of managers (“Board of Managers”) of our predecessor company, Sotera Health Topco Parent, L.P. (“Topco Parent”). In connection with our initial public offering (“IPO”) in November 2020, Topco Parent distributed shares of Sotera Health common stock to its partners, including investment funds and entities affiliated with Warburg Pincus LLC (“Warburg Pincus”) and GTCR, LLC (“GTCR” and, together with Warburg Pincus, the “Sponsors”). The Company, our Sponsors and certain holders of our common stock also entered into a stockholders agreement (the “Stockholders Agreement”) pursuant to which our Sponsors are entitled to designate certain numbers of our directors, who are reviewed by the NCG Committee, until such time as the Sponsors’ holdings of our common stock is reduced below particular thresholds. Six of our eleven directors were designated by our Sponsors. Warburg Pincus designated Mr. Chen, Mr. Knauss and Mr. Neary and is currently entitled to designate one additional director for election to our Board. GTCR designated Mr. Cunningham, Mr. Donnini and Mr. Mihas.

The four current members of Class I will stand for election at our Annual Meeting. Our directors hold office until their successors have been elected and qualified or until the earlier of their resignation or removal. The following table provides summary information, as of March 28, 2024, about the four nominees for election at our Annual Meeting and our other directors. Additional information about each director’s background and experience can be found in the sections “Board Skills, Experience and Attributes,” “Board Diversity” and “Proposal 1 — Election of Directors.”

Board Composition, Nominations Process and Director Qualifications

Board Skills, Experience and Attributes

Board Skills, Experience and Attributes

Our Board comprises a group of individuals with diverse skills, experience and attributes, which provides us with a wide range of perspectives and judgment necessary to guide our strategies, monitor their execution and advance the interests of our shareholders. As described in further detail in “Director Nominee Criteria and Process,” our NCG Committee regularly evaluates the composition of our Board. The table below summarizes several of the key characteristics of each of our directors relevant to their Board service. The table is intended as a high-level summary and not an exhaustive list of each director’s skills or contributions to our Board.

Name

Healthcare/ MedTech

Finance

International

Legal/ Regulatory

Technology & Science

Corporate Responsibility

C-Suite/ Operations

Cybersecurity

ERM

Strategy

Service on Other Public Company Boards

Ruoxi Chen

—

Sean L. Cunningham

1

David A. Donnini

1

Karen A. Flynn

1

Ann R. Klee

1

Robert B. Knauss

—

Constantine S. Mihas

1

James C. Neary

1

Michael B. Petras, Jr.

—

Vincent K. Petrella

2

David E. Wheadon

1

As further described in “Director Nominee Criteria and Process,” all directors and director nominees must demonstrate integrity, strength of character and judgment, and have extensive business experience, specific areas of expertise and the ability to devote adequate time and effort to Board responsibilities. Additional information regarding the skills, experience and attributes of each of the four nominees for election as a director at the Annual Meeting, and for each of the continuing members of our Board, is included in directors’ individual biographies on the following pages.

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Board Composition, Nominations Process and Director Qualifications

Board Diversity

Board Diversity

Our Board composition reflects our commitment to diversity. Of the eleven current directors on our Board, two have self-identified as women, one has self-identified as Asian, one has self-identified as African American or Black, one has self-identified as a member of the LGBTQ+ community, and our directors range in age from 40 to 70. We are committed to achieving a mix of Board members that represents a diversity of skills, experience and backgrounds, including with respect to age, gender identity, sexual orientation, race, ethnicity, education, cultural background and professional experience. In furtherance of this commitment, in 2022, the Board adopted amendments to the charter of the NCG Committee and the Corporate Governance Guidelines to include an explicit commitment to include candidates with the aforementioned diversity characteristics on slates of potential nominees to fill new positions on the Board.

Board Composition, Nominations Process and Director Qualifications

Board Diversity

The following Board Diversity Matrix presents our Board diversity statistics in accordance with Nasdaq Listing Rule 5606, as self-disclosed by our directors. Each of the categories listed in the below table has the meaning as it is used in Nasdaq Listing Rule 5605(f).

Director Nominee Criteria and Process

The NCG Committee is responsible for identifying and screening candidates, for developing and recommending candidates to the Board, for evaluating candidates recommended or nominated by shareholders (including nominees designated by our Sponsors), for recommending to the Board all nominees for election to the Board at the annual meeting of shareholders, and for recommending any other action with respect to candidates nominated by shareholders. The NCG Committee’s recommendations must be consistent with our organizational documents and applicable law, as well as the Company’s obligations under our Stockholders Agreement. See “Board Composition” and “Certain Sponsor Rights” on pages 6 and 17, respectively. In evaluating candidates, the Board seeks individuals of high integrity and good judgment who have a record of accomplishment in their chosen fields, and who display the independence of mind and strength of character to effectively represent the best interests of all shareholders and provide practical insights and diverse perspectives. In addition, as described above in “Board Diversity,” the NCG Committee’s charter and our Corporate Governance Guidelines include an explicit commitment to include diverse candidates on slates of potential nominees to fill new positions on the Board.

Our NCG Committee reviews with our Board, on an annual basis, the independence, skills, experience and background of Board members, and the experience, skills and background of the Board as a whole, in determining whether to recommend incumbent directors for reelection. In identifying potential new candidates for Board membership, the NCG Committee considers recommendations from directors, shareholders, management, and from time to time it will engage executive search firms to assist in the identification of qualified candidates.

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Board Composition, Nominations Process and Director Qualifications

Director Nominee Criteria and Process

Once potential director candidates are identified, the NCG Committee begins an extensive evaluation process. The evaluation and selection of qualified directors involves the consideration of many factors, including the needs of our Board at that time. In addition to those qualifications necessary to meet the requirements of our organizational documents, applicable U.S. legal, regulatory and Nasdaq listing requirements, and the Company’s obligations under our Stockholders Agreement, the NCG Committee and Board consider the following with respect to each potential director nominee:

Shareholder Nominations for Directors

The NCG Committee will consider potential director candidates recommended by shareholders in accordance with the procedures set forth in our Corporate Governance Guidelines, organizational documents, our Stockholders Agreement and applicable law. As part of this responsibility, the NCG Committee conducts, subject to applicable law, inquiries into the background and qualifications of any candidate for the Board. The NCG Committee also oversees the nomination of director candidates by shareholders in accordance with our organizational documents, our Stockholders Agreement and applicable law.

Our amended and restated bylaws provide advance notice procedures for shareholders seeking to nominate candidates for election as directors at our annual meeting of shareholders. Any shareholder nomination must comply with the requirements set forth in our amended and restated bylaws and should be sent in writing to our Secretary at Sotera Health Company, 9100 South Hills Blvd, Suite 300, Broadview Heights, Ohio 44147. To be considered timely, the Secretary must receive a shareholder’s notice not earlier than the opening of business 120 days before, and not later than the close of business 90 days before, the first anniversary of the date of the preceding year’s annual meeting of shareholders. If no annual meeting was held in the previous year, or if the date of the applicable annual meeting has been changed by more than 30 days from the date of the previous year’s annual meeting, then the Secretary must receive a shareholder’s notice, in order to be considered timely, not earlier than the opening of business 120 days before the date of such annual meeting, and not later than the close of business on the later of (i) 90 days prior to the date of such annual meeting; and (ii) the 10th day following the day on which public announcement of the date of such annual meeting was first made. No such nominations were made for the Board’s consideration this year.

Proposal 1: Election of Directors

Nominees for Election as Class I Directors

PROPOSAL 1: ELECTION OF DIRECTORS

Our Board currently comprises eleven directors, divided into three classes, each of whose members serve for staggered three-year terms. Each class consists, as nearly as possible, of one-third of the total number of directors.

The members of the classes are divided as follows:

Upon the expiration of the terms of a class of directors, directors in that class will be eligible to be elected for new three-year terms at the annual meeting of shareholders in the year in which their term expires. In accordance with our Corporate Governance Guidelines, when the election of directors at the Annual Meeting is uncontested, a director nominee must receive more votes cast “FOR” than “AGAINST” her or his election to be elected.

Our amended and restated certificate of incorporation does not provide for cumulative voting in the election of directors, which means that the holders of a majority of the outstanding shares of common stock (i.e., our Sponsors) can elect all the directors standing for election and the holders of the remaining shares are not able to elect any directors.

Nominees for Election as Class I Directors

At the Annual Meeting, the shareholders will vote to elect four Class I director nominees to serve until the 2027 Annual Meeting of Shareholders and until their successors are duly elected and qualified. On the recommendation of the NCG Committee, our Board has unanimously nominated Constantine S. Mihas, James C. Neary, Michael B. Petras, Jr., and David E. Wheadon, M.D. for election to our Board. If any of the director nominees becomes unable or unwilling to serve, proxies may be voted for the election of another candidate as shall be designated by our Board or the Board may decrease the size of the Board.

The following biographical information regarding each director includes the primary individual experience, qualifications, attributes and skills and a brief statement of those aspects of our directors’ backgrounds that led us to conclude that each director should continue to serve as a member of our Board.

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Proposal 1: Election of Directors

Nominees for Election as Class I Directors

Proposal 1: Election of Directors

Nominees for Election as Class I Directors

		13

Proposal 1: Election of Directors

Directors Continuing in Office

Directors Continuing in Office

Seven directors are serving for terms that will continue after the Annual Meeting until the 2025 or 2026 Annual Meetings of Shareholders. The following brief biographical descriptions provide information regarding these directors’ individual experience, qualifications, attributes and skills and a brief statement of those aspects of our directors’ backgrounds that led us to conclude that they should serve as directors.

Class II Directors (Terms Expire at 2025 Annual Meeting)

Proposal 1: Election of Directors

Directors Continuing in Office

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Proposal 1: Election of Directors

Directors Continuing in Office

Class III Directors (Terms Expire at 2026 Annual Meeting)

Corporate Governance

Structure and Role of the Board of Directors

CORPORATE GOVERNANCE

Structure and Role of the Board

Board Structure and Leadership

In accordance with our amended and restated certificate of incorporation, and as the Delaware General Corporation Law (“DGCL”) permits, our Board is divided into three classes, a structure that has been in place since our IPO. While the Board believes this structure continues to be in the best interests of the Company and our shareholders at this time, the NCG Committee annually considers the Board’s classified structure and will make recommendations to the Board with respect thereto as the NCG Committee deems appropriate.

Our Corporate Governance Guidelines provide that the Chair of our Board may be an officer of the Company. It is presently the Company’s policy that the positions of the Chair and the CEO be held by the same person except in unusual circumstances. The principal duty of the Chair is to lead and oversee the Board. Mr. Petras has served as our CEO since June 2016. He served as chairman of the Board of Managers of Topco Parent from January 2019 through November 2020 and has been Chairman of the Board since October 2020. The Board believes that combining the Chair and CEO roles is currently the most effective leadership structure because of Mr. Petras’ extensive knowledge of and experience in the Company’s operations, his knowledge of the industries we serve and his collaborative working and leadership style.

If the Chair is also the CEO, the independent directors may, but are not required to, select a lead director. We do not currently have a lead director. The Board believes that its function to monitor the performance of senior management is fulfilled by the presence of independent directors of stature who have substantive knowledge of the Company’s business. Pursuant to our Corporate Governance Guidelines, our independent directors are required to meet at least two times per year without the Chair and CEO or other members of management present. In view of our independent directors’ open and active communications, at this time the Board believes its current leadership structure is appropriate.

The NCG Committee annually considers the Board’s leadership structure, including the combined Chair and CEO roles and whether to appoint a lead director, and makes recommendations to the Board with respect thereto as the NCG Committee deems appropriate.

Certain Sponsor Rights

Our Stockholders Agreement provides that Warburg Pincus is entitled to designate up to:

At present, Warburg Pincus holds 74.69% of the shares of our common stock that Warburg Pincus held immediately following our IPO.

Our Stockholders Agreement also provides that GTCR is entitled to designate up to:

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Corporate Governance

Certain Sponsor Rights

At present, GTCR holds 74.69% of the shares of our common stock that GTCR held immediately following our IPO.

Our amended and restated certificate of incorporation provides that only our Board may change the authorized number of directors, subject to the rights of any holders of any series of our preferred stock, provided that, without the consent of Warburg Pincus or GTCR, the authorized number of directors may not exceed eleven as long either Warburg Pincus or GTCR is entitled to designate at least one director. Any additional directorships resulting from an increase in the number of directors are to be distributed among the three classes of directors so that, as nearly as possible, each class will consist of one-third of the directors. This classification of our Board may have the effect of delaying or preventing changes in our control or management.

Subject to restrictions under applicable law or the Nasdaq listing rules, our Stockholders Agreement also provides that Warburg Pincus and GTCR are each entitled to representation on each Board committee proportionate to the number of directors they are entitled to designate on our Board. Consistent with Nasdaq’s heightened independence standards for audit committees, however, no Sponsor-designated director sits on our Audit Committee. In addition, Warburg Pincus is entitled to appoint the Chair of our Leadership Development and Compensation Committee (the “LDC Committee”) for so long as Warburg Pincus has the right to designate at least one director for election to our Board. See “Stockholders Agreement” on page 71 for additional information about our Stockholders Agreement.

Our amended and restated certificate of incorporation provides that our directors may be removed only for cause by the affirmative vote of the holders of at least 75% of the votes that all our shareholders would be entitled to cast in an annual election of directors, provided that for so long as either Warburg Pincus or GTCR collectively hold at least a majority of our outstanding capital stock, a director designated by Warburg Pincus or GTCR may be removed with or without cause only by the affirmative vote of the holders of a majority of our outstanding capital stock and with the consent of Warburg Pincus or GTCR, respectively.

In late February 2024, the Delaware Court of Chancery issued a decision that invalidated certain provisions of a stockholder agreement between another company and the controlling stockholder of that company on the grounds that that those provisions violated Section 141(a) of the DGCL. While the stockholder agreement at issue contains some similarities to our Stockholders Agreement, our overall governance arrangements also differ in significant respects from those at issue in the Chancery Court’s decision. The decision remains subject to appeal to the Delaware Supreme Court, and we will continue to monitor how Delaware law in this area evolves.

Director Independence

Our Board, together with the NCG Committee and the Company’s legal counsel, conducts an annual review of the independence of each director. Based on information the directors provided concerning their backgrounds, employment and affiliations, including family relationships, our Board has determined that none of our directors and director nominees has any relationships that would interfere with her or his exercise of independent judgment in carrying out the responsibilities of a director and that, with the exception of Mr. Petras, all the directors and director nominees are “independent” under the listing standards of the Nasdaq stock exchange. In making these determinations, the Board considered the current and prior relationships that each director and director nominee has with our Company and all other facts and circumstances the Board deemed relevant in determining their independence, including their beneficial ownership of our capital stock and any transactions between them and the Company, as further described in the section titled “Certain Relationships and Related Party Transactions.”

The Sponsors beneficially own shares representing a majority of the outstanding shares of our common stock. As a result, we are considered a “controlled company” under the Nasdaq rules and therefore may elect not to comply with certain Nasdaq corporate governance standards, including the requirements that

Corporate Governance

Director Independence

Although we qualify as a “controlled company,” we do not currently rely on the exemptions for controlled companies and intend to continue to comply with all corporate governance requirements under the Nasdaq corporate governance standards for non-controlled companies.

Board Role in Risk Oversight

Our Board is responsible for overseeing senior management’s management of enterprise risks, including assessing senior management’s processes for identifying and mitigating enterprise risks. This oversight is carried out at the level of the full Board and through its five committees.

An important element of the Board’s oversight involves regular interaction with senior management. The Board receives regular reports throughout the year from senior management, including from leaders in each of our three business units, to ensure the Board is well informed of risk exposures related to our strategy and operations, including regarding environmental, health and safety, sustainability, quality, legal, financial reporting, reputational and human capital management risks. In addition, the Board has tasked each of its committees with the following risk-related responsibilities, described in more detail in the section entitled “Committees of the Board of Directors.”

Primary Areas of Risk Oversight

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Corporate Governance

Board Meetings and Attendance

Board Meetings and Attendance

All directors are expected to attend all meetings of the Board, all meetings of the committees of the Board on which they serve and our annual meeting of shareholders. The Board met six times in 2023 and each director attended at least 75% of the aggregate number of meetings of the Board and the committees on which he or she served during the period in which he or she was a director or committee member, with the average attendance at meetings of the Board and its standing committees exceeding 98 percent. All directors attended the 2023 Annual Meeting of Shareholders.

Executive Sessions

Executive sessions are typically scheduled with the Chairman at the beginning of each regular Board meeting and among only the directors immediately after each regular Board meeting. Throughout 2023, directors met in regular executive sessions, both with the Chairman and without the Chairman or any other member of management present. The Audit, NCG and LDC Committees also all met in executive sessions without members of management present. The Audit Committee also held regularly scheduled private sessions with our Chief Financial Officer, internal audit leadership and external auditors. The LDC Committee held regularly scheduled private sessions with our Chief Human Resources Officer and Exequity, LLP (“Exequity”), an independent compensation consultant that reports directly to the LDC Committee.

Committees of the Board of Directors

We have an Audit Committee, a Leadership Development and Compensation Committee, a Nominating and Governance Committee, an EO Litigation Committee and a Nordion Pricing Committee. The composition and responsibilities of each of the committees of our Board are described below. The NCG Committee is responsible for reviewing committee membership and making recommendations to the Board regarding committee composition, consistent with the Company’s organizational documents, our Stockholders Agreement and applicable law. Members serve on committees until their resignation or until our Board determines otherwise. Our Board may change the membership of committees or establish other committees as it deems necessary or appropriate from time to time. Most recently, in October 2022, at the recommendation of the NCG Committee, the Board formed the EO Litigation Committee.

Audit Committee

The Audit Committee’s main purposes are to oversee our accounting and financial reporting processes, our relationship with our independent auditors, our compliance with legal and regulatory requirements and our policies and procedures with respect to risk assessment and risk management.

In carrying out these purposes, the Audit Committee:

Corporate Governance

Committees of the Board of Directors

The Audit Committee met five times in 2023. The current members of the Committee are Mr. Petrella (chair), Ms. Flynn (who was appointed to the Audit Committee in February 2024), Ms. Klee and Dr. Wheadon. Each member of the Committee is “independent” as defined under the Nasdaq rules and Rule 10A-3 of the Exchange Act. Our Board has determined that each member of the Audit Committee is financially literate and that Mr. Petrella is a financial expert.

Our Audit Committee operates under a written charter, which is available on our Investor Relations website at https://investors.soterahealth.com/.

Leadership Development and Compensation Committee

The main purposes of the LDC Committee are to oversee the compensation of our directors and employees, including our CEO and other executive officers, and to oversee management development and succession planning and related matters.

In carrying out these duties, the LDC Committee:

The LDC Committee met five times in 2023. The members of the LDC Committee are Mr. Neary (chair) and Mr. Mihas. Both are “independent” as defined under the Nasdaq rules.

Our LDC Committee operates under a written charter, which is available on our Investor Relations website at https://investors.soterahealth.com/.

Nominating and Corporate Governance Committee

The NCG Committee’s main purposes are to identify and evaluate individuals qualified to become Board members consistent with criteria the Board approved, to recommend for the Board’s approval the slate of nominees for proposal to shareholders for election to the Board, to develop and recommend to the Board for approval a set of Corporate Governance Guidelines, to lead the annual review of the performance of the Board and each of its standing committees,

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Corporate Governance

Committees of the Board of Directors

and to oversee our program related to corporate responsibility and sustainability, including ESG initiatives. In carrying out these purposes, the NCG Committee:

The NCG Committee met four times in 2023. The members of the NCG Committee are Ms. Klee (chair), Mr. Chen, Mr. Cunningham, Mr. Donnini and Dr. Wheadon. Each member of the Committee is “independent” as defined under the Nasdaq rules.

Our NCG Committee operates under a written charter, which is available on our Investor Relations website at https://investors.soterahealth.com/.

EO Litigation Committee

The EO Litigation Committee was formed in October 2022 to oversee the Company’s management of litigation involving EO. The Committee monitors litigation developments, oversees our overall litigation strategy and reports to and makes recommendations to the Board as may be warranted. The EO Litigation Committee met 18 times in 2023. The members of the EO Litigation Committee are Mr. Cunningham, Ms. Klee, Mr. Knauss and Mr. Petrella.

Nordion Pricing Committee

The Nordion Pricing Committee oversees matters related to Nordion’s pricing that implicate sensitive or confidential customer information. The main purpose of this Committee is to prevent confidential information relating to Nordion’s customers from being shared with individuals involved in the day-to-day operations of Sterigenics. The Nordion Pricing Committee met three times in 2023. The members of the Nordion Pricing Committee are Mr. Chen, Mr. Cunningham, Ms. Flynn (who was appointed to the Nordion Pricing Committee in February 2024) and Mr. Petrella.

Corporate Governance Policies and Practices

Corporate Governance Guidelines

The NCG Committee is responsible for reviewing our Corporate Governance Guidelines annually and recommending amendments to the Board as the NCG Committee deems necessary or appropriate for the Board to discharge its responsibilities more effectively. In December 2023, the Board approved amendments to the Corporate Governance Guidelines to reduce the number of other public company boards on which the CEO may serve from two to one, to limit other directors to serving on the boards of no more than three other public companies and to reinforce the Company’s commitment to majority voting by requiring any director in an uncontested election who does not receive a majority of the votes cast to tender her or his resignation to the Board (which is then to consider the offer based on the relevant facts and circumstances).

The full text of our Corporate Governance Guidelines is accessible on our investor relations website at https://investors.soterahealth.com/.

Corporate Governance

Board and Committee Self-Evaluations

Board and Committee Self-Evaluations

The Board and each standing committee conduct annual self-evaluations. Consistent with its charter, the NCG Committee led the Board self-evaluation process and oversaw the annual evaluation of the performance of each standing committee. The Chair of the NCG Committee reports to the Board conclusions about the effectiveness and performance of the Board and makes recommendations to the Chair and/or the Board regarding proposed changes considered appropriate for the Board’s consideration.

Code of Business Conduct and Ethics

Our Board has adopted procedures and policies to comply with the Sarbanes-Oxley Act of 2002 and the rules adopted by the SEC and the Nasdaq, including a global code of conduct applicable to all employees, including our CEO, Chief Financial Officer (“CFO”) and other executive and senior financial officers and all persons performing similar functions. Our global code of conduct is available on our website. We intend to disclose any amendments to the code, or any waivers of its requirements, on our website to the extent required by the applicable U.S. federal securities laws and the corporate governance rules of the Nasdaq.

Promoting Integrity

Integrity is one of our core values. We expect the highest standards of integrity from our employees when dealing with customers, suppliers, regulators and each other. If employees do not feel comfortable or are otherwise unable to raise with their manager questions or concerns regarding ethics, compliance with laws, regulations or policies or workplace culture, employees are expected and encouraged to promptly report those questions or concerns on our Global Ethics Line, which is available 24 hours a day, 7 days a week to every employee worldwide. Live telephonic assistance is available via a tollfree number with operators available in multiple languages. Reports may also be made via electronic submission through our Global Ethics Line web portal. All reporters have the option of remaining anonymous to the extent permitted by local laws and regulations.

Calls to our Global Ethics Line are received by a third-party vendor that promptly reports the issue(s) to our internal investigations team. Pursuant to our whistleblower policy, general reports received via our Global Ethics Line are transmitted to an internal review team from the legal department, Human Resources or internal audit. Reports relating to potential fraud or errors in the preparation or reporting of the Company’s financial condition are referred to an internal review team composed of at least the General Counsel, CFO and another member of the Company’s disclosure committee. Any reports raising a potentially material issue are promptly shared with the Chair of the Audit Committee. Our General Counsel also reports to the Audit Committee at least quarterly regarding any significant issues raised through the Global Ethics Line.

Our whistleblower policy prohibits retaliation against anyone who raises a question or concern or assists in the subsequent investigation of a question or concern.

Communications with the Board

Any interested parties wishing to communicate with, or otherwise make their concerns known directly to the Board, a Board committee, or to individual directors regarding matters related to the duties and responsibilities of the Board may do so by addressing such communications or concerns to board@soterahealth.com. The Secretary reviews all communications sent to the Board and relays inquiries relating to the functions of the Board or a Board committee to the Board, a board committee or to individual directors as may be appropriate. The Secretary will not relay inquiries unrelated to the duties and responsibilities of the Board or its committees, including complaints, solicitations, advertisements, resumes or other employment inquiries, service or product inquiries, or materials that are threatening or illegal.

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Non-Employee Director Compensation

2023 Non-Employee Director Compensation Table

NON-EMPLOYEE DIRECTOR COMPENSATION

2023 Non-Employee Director Compensation Table

The following table sets forth information regarding the compensation earned by or paid to each person who served as a non-employee director of our Board during 2023. We reimburse directors for reasonable out-of-pocket expenses incurred in connection with their service to the Board and covered such expenses in 2023. Mr. Petras, our Chairman and CEO, receives no compensation for his service as a director and is not included in this table. The compensation Mr. Petras received as CEO is presented in the Summary Compensation Table.

Non-Employee Director Compensation Policy

Our Board adopted a compensation policy for non-employee directors that became effective in connection with our IPO. Pursuant to this policy, non-employee directors receive the compensation described below. Our non-employee director compensation policy may be amended by our Board from time to time.

Cash Compensation

Each non-employee director is entitled to receive an annual cash retainer of $75,000 as remuneration for service to the Company, with an additional $7,500 for service on the Audit Committee (or, in the case of the chair of the Committee, $25,000), an additional $5,000 for service on the LDC Committee (or, in the case of the chair of the Committee, $20,000), and an additional $2,500 for service on the NCG Committee (or, in the case of the chair of the Committee, $15,000). There is no additional compensation for service on the EO Litigation or Nordion Pricing Committees. The annual cash retainer is paid on a quarterly basis, pro-rated for any non-employee director whose service (or whose service in any of the additional capacities described above) begins or ends amid a calendar year.

Non-Employee Director Compensation

Non-Employee Director Compensation Policy

Equity Compensation

Each non-employee director is entitled to receive an annual grant of restricted stock units (“RSUs”) under the Sotera Health Company 2020 Omnibus Incentive Plan with a target value of $225,000. The RSUs are time-based and vest in full on the earlier of (i) the first anniversary of the date of grant, and (ii) the date immediately prior to the Company’s next regular annual meeting of shareholders, in each case, subject to the director’s continued service through such date. Annual grants of RSUs are generally made on the day immediately after our regular annual meeting of shareholders to non-employee directors who are serving on our Board on such date.

Expenses

We reimburse our non-employee directors for all reasonable out-of-pocket expenses incurred in connection with their service on our Board, including attendance at meetings of the Board, the board of directors of any of our subsidiaries and any committees thereof, in accordance with the terms of our amended and restated bylaws and our expense reimbursement policy, as in effect from time to time.

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Proposal 2: Advisory Vote to Approve Named Executive Officer Compensation

PROPOSAL 2: ADVISORY VOTE TO APPROVE NAMED EXECUTIVE OFFICER COMPENSATION

In accordance with Section 14A of the Securities Exchange Act of 1934, we are asking shareholders to approve, on an advisory basis, the compensation of our Named Executive Officers as reported in this Proxy Statement. While this vote (commonly referred to as a “say-on-pay” vote) is non-binding, we and our Board of Directors value the opinions of our shareholders and will consider the outcome of this vote when making future compensation decisions.

We encourage shareholders to review the Compensation Discussion and Analysis, beginning on page 27, as well as the Summary Compensation Table and other related tables, notes and narrative. For the reasons detailed in the Compensation Discussion and Analysis, our executive compensation program aligns the interests of our executive officers and our shareholders by linking a significant portion of our executives’ compensation to Sotera Health’s performance and providing a competitive level of compensation designed to recruit, retain and motivate executives who are critical to Sotera Health’s long-term success.

We are asking our shareholders to approve, on an advisory, non-binding basis, the following resolution:

Resolved, that the shareholders of Sotera Health Company approve, on an advisory basis, the compensation of the Company’s Named Executive Officers as disclosed pursuant to the compensation disclosure rules of the Securities and Exchange Commission, including the Compensation Discussion and Analysis, the Summary Compensation Table, the other compensation tables and related notes and narrative in this Proxy Statement for the 2024 Annual Meeting of Shareholders.

At the 2022 Annual Meeting of Shareholders, the shareholders approved the Board’s proposal to seek advisory approvals of the compensation of our Named Executive Officers on an annual basis. Accordingly, the next advisory approval of executive compensation will occur at the 2025 Annual Meeting of Shareholders.

Compensation Discussion and Analysis

Overview

COMPENSATION DISCUSSION AND ANALYSIS

Overview

This Compensation Discussion and Analysis describes the Company’s executive compensation program and provides an overview of our executive compensation-related policies, practices and decisions for 2023. Our “Named Executive Officers,” or “NEOs,” as of December 31, 2023, are listed below:

Executive Transitions in 2023

On June 26, 2023, the Company hired Jonathan Lyons as our Chief Financial Officer. Mr. Lyons was selected by the Board based on his extensive expertise in leading multiple finance disciplines in complex and global businesses across healthcare and industrial sectors. His wide variety of leadership roles and his deep knowledge of corporate finance and capital markets will be an asset to the Sotera Health team. In connection with the commencement of his employment, Mr. Lyons entered into an offer letter and restrictive covenants agreement with the Company. Effective upon the hiring of Mr. Lyons, Mr. Biehl, who was serving as our Interim CFO, stepped down as Interim CFO and, following a brief transition period, left the organization on August 4, 2023. Mr. Biehl did not receive any severance upon his departure.

2023 Executive Compensation Highlights

Our executive compensation program is designed to align the interests of our executives with the interests of our shareholders and is guided by three core principles:

The following summarizes the LDC Committee’s key actions with respect to our 2023 executive compensation program and demonstrates the program’s focus on the three principles described above.

2023 Annual Incentive Plan (AIP) Payouts. The Company’s 2023 performance produced payouts under our Annual Incentive Plan (“AIP”) at 85% of target for overall Company performance and at 91% of target for Sterigenics performance.

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Compensation Discussion and Analysis

2023 Executive Compensation Highlights

Executive payouts are based on the achievement of the financial performance goals and individual performance, including the extent to which the executive demonstrates our core values. See “Annual Incentive Plan (AIP)” on page 35 for more information.

Annual Long-Term Equity Incentive Awards. In March 2023, we granted awards under our annual equity award cycle. Except for Mr. Dimitrief, who received equity grants when he became our General Counsel in November 2022, and Mr. Biehl, due to the interim nature of his appointment, each NEO we employed as of March 2023 received a long-term equity incentive award comprised of stock options and time-based RSUs. Consistent with our compensation philosophy, we use equity incentive compensation to incentivize long-term value creation and align our executives’ interests with those of our shareholders. The LDC Committee also uses equity incentive compensation to attract and retain talent.

New Compensation Arrangements. Pursuant to the terms of his offer letter, Mr. Lyons receives an annual base salary of $475,000 and his target annual bonus opportunity under the Company’s AIP is equal to 70% of his annual base salary. Mr. Lyons’ annual long-term equity incentive award target grant date fair value is $1,200,000, which for 2023 was prorated to his start date and comprised of RSUs and stock options, each with a target grant date fair value of $300,000. To compensate Mr. Lyons for the value of cash and equity incentive awards forfeited with his former employer, he received a one-time lump sum cash award of $200,000, payable on the first payroll date in July 2023, and an equity replacement award of RSUs with a target grant date fair value of $1,000,000. All equity awards vest in equal installments over a three-year period from date of grant. For additional details on Mr. Lyons’ compensation and employment arrangements, see “Compensation Elements for 2023” on page 34 and “Employment Agreements” on page 47.

2023 Say-On-Pay Engagement and Response

We regularly engage in shareholder outreach and, prior to 2023, discussions with shareholders regarding our executive pay program had generally reflected stockholders’ overall satisfaction with the program. Based on this positive feedback, we maintained the same basic approach to executive compensation program design and pay positioning in the years following our IPO, including the design and positioning of our pay program in 2023.

Shortly before our 2023 Annual Meeting of Shareholders, Glass Lewis recommended that shareholders vote for our say-on-pay proposal. In contrast, Institutional Shareholder Services (“ISS”) recommended that shareholders vote against our say-on-pay proposal on the grounds that the long-term incentive grants to our NEOs and one-time incentive grants to certain of our NEOs were entirely time-vesting. Our 2023 say-on-pay proposal was supported by 85.7% of shares voted. We believe that our ability to obtain 85.7% stockholder support despite ISS’s negative recommendation indicates that a significant majority of our stockholders supports our overall executive compensation program.

Despite this strong overall shareholder support, we remained disappointed by ISS’s position and, as part of our shareholder engagement program, endeavored to better understand potential concerns with our executive pay program and ways that our shareholders believed we could improve the program. The LDC Committee and Board similarly viewed ISS’s input as an opportunity to reexamine our executive compensation program and to engage in continuing conversations with our stockholders and other stakeholders on executive compensation. As detailed at pages 4-5, we met with 12 of our largest shareholders representing 48% of our total outstanding shares held by non-affiliates to engage on governance topics, including our executive pay program. After careful consideration of shareholder input following the 2023 say-on-pay vote, the LDC Committee approved prospective compensation design modifications and is considering several additional program changes to address the feedback that we have received from our shareholders. The table below sets forth an overview of the feedback we heard on our executive compensation program during shareholder engagement sessions following the 2023 say-on-pay vote and the actions we have taken and are considering taking in response.

Compensation Discussion and Analysis

2023 Say-On-Pay Engagement and Response

2023 Business Performance Highlights

2023 was another good year for the Company. On a consolidated basis, we grew revenue by 4.5%. Sterigenics, our largest reporting segment, delivered 6.5% revenue growth, completed four capacity expansion projects and made significant progress on numerous EO emissions control enhancements across its United States facilities. These enhancements are industry-leading and underscore our overarching commitment to ensure safe, best-in-class, operations for our employees, customers and the communities in which we operate. Our Nordion segment continued to navigate unprecedented geopolitical uncertainty and adeptly managed third-party Cobalt-60 harvest supply schedules to deliver 4.4% revenue growth from the prior year. Finally, Nelson Labs achieved significant growth via its technical consulting team during the year. Following its 2021 acquisition, RCA continues to deliver strong revenue growth as it provides customers with world-class regulatory consulting for FDA and global regulatory submissions.

2023 Target Total Direct Compensation

Our NEOs’ 2023 target total compensation was consistent with our pay for performance philosophy and focused on variable compensation that was aligned with the Company’s overall performance and the Company’s stock performance. The chart below shows that 89% of the CEO’s 2023 compensation was performance-based with a significant portion (76%) tied to the future performance of the Company. For our other NEOs, 75% of their 2023 target total compensation was performance-based, with a significant portion (60%) tied to the future performance of the Company. The variable elements of our 2023 compensation program included (i) our Annual Incentive Plan, which is our annual cash incentive award program, and (ii) Long-Term Equity Incentive Program, which in 2023 was comprised of stock options and RSUs.

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Compensation Discussion and Analysis

2023 Say-On-Pay Engagement and Response

CEO Target Total Compensation Mix

Non-CEO NEOs Average Total Compensation Mix⁽¹⁾

Compensation Philosophy and Program

Our executive compensation program is guided by three principles: (i) paying for performance; (ii) driving achievement of the Company’s annual and long-term business performance goals; and (iii) paying competitively to attract, retain and motivate top talent. These principles guide our program’s design, pay levels, and approach to total rewards. Our executive compensation program comprises three elements: base salary, short-term annual cash incentive compensation and long-term equity incentive compensation. Our NEOs are eligible to participate in the standard health and welfare benefit plans offered to our other employees; a non-qualified deferred compensation plan for which the Company has not to-date provided matching, further described on page 40; and, upon certain qualifying terminations of employment, severance payments (as described beginning on page 50).

Compensation Discussion and Analysis

Compensation Philosophy and Program

We endeavor to incorporate best practices and good corporate governance policies and procedures throughout our executive compensation program. These compensation practices and governance policies include:

First Compensation Principle: Paying for Performance

Executive compensation, including merit increases and annual incentive payouts, is determined primarily by Company performance and individual performance. An individual’s annual performance can positively or negatively impact that individual’s merit base pay increase. Earned values under our AIP are directly tied to Company-wide and business unit success. Demonstrating the link between pay and performance, while we delivered both revenue and EBITDA growth in 2023, we fell short of our target, which resulted in an AIP payout at 85% of target for overall Company performance. Equity incentive compensation further aligns NEOs’ compensation with long-term Company performance. Stock options are valuable only to the extent the stock price increases from the grant date, and the performance of our stock drives, by definition, the value of RSUs and restricted stock.

Second Compensation Principle: Driving Achievement of Short- and Long-Term Business Performance Goals

We believe it is important to reward achievement of annual and long-term business goals and we structure our performance-based compensation accordingly. We maintain an Annual Incentive Plan, pursuant to which the LDC Committee sets performance targets to motivate NEOs to achieve our short-term financial and operational objectives, ensuring accountability for progress towards longer-term strategic goals. Under our AIP, NEOs receive annual cash incentive opportunities tied to the achievement of both target annual EBITDA performance metrics set for the Company (and, in Mr. Rutz’s case, for the Sterigenics business and the Company) and individual performance factors, which include individual performance against Company values, which are foundational to our Company’s culture, including our corporate responsibility initiatives. See “Annual Incentive Plan (AIP)” on page 35 for additional detail about our annual performance assessment process.

While we believe incentivizing the achievement of annual business goals is critical, we strive to reward an appropriate balance of annual and long-term financial and strategic business results. Our pay mix is designed to deliver over 50% of NEOs’ target total compensation in the form of equity awards linked to the value of our stock. We use equity awards to incentivize and reward long-term value creation and align our executives’ interests with those of our shareholders. In connection with our IPO in November 2020, the NEOs with the Company at that time (Mr. Petras and Mr. Rutz) received long-term equity incentive awards consisting of stock option awards and time-based RSUs, which vest over a four-year term beginning on the first anniversary of the grant date (the “IPO Equity Awards”). No additional long-term equity awards were granted in 2021 to recipients of the IPO Equity Awards. In 2022, we commenced an annual equity award cycle and each

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Compensation Discussion and Analysis

Compensation Philosophy and Program

NEO we employed in March 2022 received a long-term equity incentive award comprising stock option awards and time-based RSUs. We continued with our annual equity award cycle in 2023, making a long-term equity incentive award grant comprised of stock option awards and time-based RSUs to each NEO we employed in March 2023 (except for Mr. Dimitrief and Mr. Biehl) and a prorated long-term equity incentive award grant to Mr. Lyons following the commencement of his employment. Our policies and practices regarding stock option and RSU grants, including the timing of grants and the determination of the exercise price, are further described beginning on page 37. The stock ownership guidelines we adopted to further align the interests of our senior executive team, executive officers and directors with those of our shareholders are further described on page 41.

Third Compensation Principle: Paying Competitively to Attract and Retain Top Talent

Our compensation program is designed to attract, retain and motivate high-performing executives critical to the Company’s short- and long-term success. As described in more detail below, we seek to ensure the overall level of total compensation for our executive officers is reasonable in relation to, and competitive with, the compensation similarly situated peer leaders in our industry pay, subject to variation for individual factors such as experience, performance, duties, scope of responsibility, prior contributions and future potential contributions to our business. With the assistance of our independent compensation consultant, the LDC Committee monitors market trends, including the prevalence of compensation delivery mechanisms, and adjusts the design and operation of our executive compensation program periodically as the LDC Committee deems appropriate, including to achieve our executive retention objectives. We believe our current compensation program, in particular our equity incentive program, provides high retentive value for the members of our leadership team who are critical to the Company’s success. From time to time, we have included cash bonuses and one-time equity awards in the total compensation of our executives to attract and retain talent, as further discussed herein and in previously filed Proxy Statements.

Compensation-Setting Process

The Role of the LDC Committee

The LDC Committee establishes our compensation philosophy and annually reviews and approves our executive compensation program. The Committee reviews and approves each NEO’s base salary, target and earned annual cash incentive awards and recommends to the full Board for approval the type and target value of each NEO’s long-term equity incentive award. The Board (without the CEO’s participation) also reviews and approves each element of our CEO’s compensation.

The LDC Committee is authorized to retain independent advisors to assist the LDC Committee in carrying out its responsibilities and, in 2021, 2022, and 2023, the Committee retained Exequity to review and provide input on our executive compensation program. At least annually, the Committee reviews with Exequity the executive compensation program, including incentive compensation plans and arrangements, to: (i) ensure the elements of our compensation program are based on appropriate measures, goals and targets for our industry and our business objectives; (ii) ensure our program is achieving its intended purpose of incentivizing achievement of short-and long-term business goals, as well as attracting and retaining executive talent; and (iii) determine whether any changes to our compensation program are advisable.

The Role of our CEO and Management

The LDC Committee works with members of management, including our CEO and Chief Human Resources Officer (“CHRO”), to determine the compensation of our NEOs and other executives. Management further works with the Committee annually to recommend the structure of our AIP, to develop AIP performance metrics, including threshold, target and maximum performance levels, and to evaluate actual Company performance against selected measures.

Additionally, the CEO makes recommendations to the Committee regarding the compensation of the other NEOs and other executives. At the beginning of each year, our CEO reviews our NEOs’ and other executives’ prior year’s performance and makes recommendations to the LDC Committee for each element of such executives’ compensation (other than his own),

Compensation Discussion and Analysis

Compensation-Setting Process

including any salary adjustments, adjustments to AIP target as a percentage of salary for the current year, actual AIP payout for the previous year, and target grant date value of long-term equity awards. The CEO’s compensation recommendations are based on his performance evaluation of each executive, the Company’s performance in the preceding year, and data provided by the LDC Committee’s compensation consultant concerning compensation practices among the Company’s compensation peer group. The LDC Committee considers the CEO’s recommendations when making executive compensation decisions, but the LDC Committee (and the Board, with respect to equity awards and CEO compensation) retains full discretion to set all compensation for our NEOs. For further discussion of the annual performance management process, see “Compensation Elements for 2023 — Annual Incentive Plan (AIP).”

The Role of the Compensation Consultant

The LDC Committee has engaged Exequity as its independent compensation consultant. Although Exequity periodically meets with the CEO and CHRO to gather information and provide advice about management proposals to the Committee, Exequity reports directly to the LDC Committee and not to management. Pursuant to its charter, the LDC Committee makes all determinations regarding the terms of the Company’s engagement with Exequity, including the services Exequity provides to the Company and the fees paid for those services. The Committee retains the prerogative to replace its compensation consultant or hire additional advisors at any time. At the invitation of the LDC Committee, representatives of Exequity attend meetings of the LDC Committee. The Committee also communicates with Exequity outside of meetings as needed.

The nature and scope of services that Exequity provided in 2023 included the following:

Competitive Positioning

Consistent with our goal of providing competitive compensation to attract and retain executives, the LDC Committee reviews market data on executive compensation levels and practices drawn from a group of peer companies similar to the Company in industry focus, revenue and market capitalization. While the Committee does not specifically target any particular percentile for any element of an NEO’s compensation, it does consider as a reference point the market median for each element of an NEO’s compensation.

The LDC Committee assessed our 2022 compensation peer group for 2023 compensation decisions, based on a review by Exequity, and no changes were made at that time. The 2022 peer group consisted of companies that we identified as serving with the Company for executive talent, business competitors, and companies referenced in the executive pay benchmarking processes disclosed by such talent and business competitors. In identifying candidates for the peer group, in consultation with Exequity, the LDC Committee reviewed companies that generally operated within the following industry segments: Health Care Equipment, Life Sciences Tools and Services, Health Care Supplies, Biotechnology and Pharmaceuticals, and Health Care Technology. When assessing potential peers with these characteristics, the LDC Committee further considered the relative sizes of those peer candidates in relation to the Company. The LDC Committee generally sought to include peer candidates with annual revenues of 0.5x –4.0x the Company’s revenues and a total enterprise value of 0.2x – 3x the Company’s total enterprise value. The LDC Committee also reviewed peer candidates’ EBITDA relative to the Company’s as an indicator of each company’s scale and performance.

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Compensation Discussion and Analysis

Compensation-Setting Process

The compensation peer group used for 2023 compensation decisions consisted of the following companies:

Changes to the Peer Group for 2024 Compensation Decisions

In 2023, the LDC Committee reassessed the peer group for 2024 compensation decisions and approved several changes. Abiomed, Inc. was removed due to its acquisition and Catalent, Inc. and Charles River Laboratories International, Inc. were removed due to their size relative to the Company. In considering potential additions for the 2024 peer group, the LDC Committee reviewed companies within the aforementioned industry segments with annual revenues and total enterprise value of between 0.4x and 2.5x of the Company’s annual revenues and total enterprise value. The LDC Committee also reviewed peer candidates’ EBITDA relative to the Company’s as an indicator of each company’s scale and performance. Based on this analysis, Maravai LifeSciences Holdings, Inc. was added to the peer group.

2023 Compensation Decisions

The factors described in the table below informed the Committee’s decisions in setting 2023 executive compensation as further described below. Specifically, in determining our non-CEO NEOs’ 2023 total target compensation, and recommending to the Board the CEO’s total target compensation and NEOs’ long-term equity incentive compensation, the Committee considered:

The LDC Committee did not assign a particular weighting to any of these factors. Rather, the Committee considered this information in light of their experience and knowledge of the Company, the competitive market in which the Company operates, their knowledge of each NEO and business judgment.

Compensation Elements for 2023

Base Salary

To maintain competitiveness and internal pay equity, we provide each NEO with a base salary. This compensation component constitutes a stable element of compensation while other compensation elements are variable. As described above, when setting base salaries, the LDC Committee considers a multitude of factors, including market practice, individual performance, Company performance, any change in the executive’s position within our business, the scope of his or her responsibilities and any changes thereto.

Compensation Discussion and Analysis

Compensation Elements for 2023

Base salary increases are not guaranteed or automatic. In March 2023, based on the factors described above in “2023 Compensation Decisions,” the LDC Committee approved a base salary increase for Mr. Rutz, effective April 3, 2023. After reviewing competitive market data provided by Exequity and in consideration of his individual performance, Mr. Rutz’s salary was increased to $470,000 from $450,000.

The Committee approved the base salary for Mr. Lyons in June 2023, in connection with his joining the Company as CFO. The base salaries of our NEOs for 2022 (as applicable) and 2023 were as follows:

Annual Incentive Plan (AIP)

Our AIP is designed to reward high performance, ensure employees are aligned with our mission, values and priorities and provide market competitive rewards. Our executive officers (including our NEOs, other than Mr. Biehl) are eligible to participate in our AIP. The LDC Committee administers the AIP with respect to our NEOs by approving annual performance metrics, including threshold, target and maximum performance levels, establishing performance targets as a percentage of base salary for each NEO, and evaluating actual Company performance against selected measures.

The annual cash incentive opportunities set for our NEOs under our 2023 Annual Incentive Plan were tied to (i) the Company’s achievement of financial performance goals (and Sterigenics’ financial performance goals, in Mr. Rutz’s case) approved by the LDC Committee at the beginning of the applicable performance period, and (ii) individual performance. There is no AIP payout if the Company does not (or, in the case of Mr. Rutz, the Company and Sterigenics do not) achieve threshold performance for the financial performance metric.

The target financial metrics for the Company and Sterigenics for our 2023 AIP are included in the below table. Our 2023 AIP financial performance metric for the Company (“Company AIP Metric”) was based on our non-GAAP financial measure, Adjusted EBITDA. The 2023 Company AIP Metric was calculated in a manner consistent with the calculation of Adjusted EBITDA as reported in the Company’s Form 10-K for the year ended December 31, 2023, subject to adjustments as deemed appropriate by the LDC Committee. Our 2023 AIP financial performance metric for Sterigenics (“Sterigenics AIP Metric”) was based on Sterigenics Segment Income. The 2023 Sterigenics AIP Metric was calculated in a manner consistent with the calculation of Sterigenics Segment Income as reported in the Company’s Form 10-K for the year ended December 31, 2023. AIP performance between threshold, target and maximum goals is determined based on linear interpolation.

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Compensation Discussion and Analysis

Compensation Elements for 2023

Target levels of performance were based on the Company’s beginning-of-year business plan, and were consistent with external guidance. The targets were deemed by the LDC Committee to be challenging but attainable with excellent performance. The ranges of performance from threshold to target were developed as a function of the variability of Company-wide and Sterigenics Adjusted EBITDA, and are generally consistent with ranges employed by companies in our industry and in the general market with respect to EBITDA goals.

The 2023 target bonus opportunities for Mr. Petras, Mr. Lyons, Mr. Rutz and Mr. Dimitrief were, respectively, 125%, 70%, 60%, and 50% of their base salaries. Individual bonus payouts for Mr. Petras, Mr. Lyons and Mr. Dimitrief were determined by Company performance (80% of award) and individual performance (20% of award). Mr. Rutz’s bonus was determined by the performance of both the Company and Sterigenics (80% of award, with Sterigenics performance having a 75% weighting and Company performance a 25% weighting) and his individual performance (20% of award).

In determining annual incentive payouts payable for the achievement of financial performance goals, following the close of the fiscal year, the LDC Committee considered actual Company and Sterigenics performance against the financial performance metrics set forth in the table above. The LDC Committee assessed the Company AIP Metric to account for any extraordinary, unusual, or non-recurring events during the performance period, and no such adjustments were made. The LDC Committee also assessed and then adjusted the Sterigenics AIP Metric to account for the removal of corporate costs allocated to the Sterigenics segment. The results for our 2023 Company AIP Metric and Sterigenics AIP Metric were $528.0 million and $391.7 million, respectively. The 2023 financial performance goals set forth under our Annual Incentive Plan for overall Company performance and for Sterigenics performance were achieved at 85% of target and 91% of target, respectively.

The following table details the Company’s and Sterigenics’ Adjusted EBITDA performance in relation to the pre-established goals, as well as the related payout factors resulting from 2023 performance:

When determining the amount payable to NEOs for the achievement of individual goals, the LDC Committee considers the recommendation of the CEO regarding the other NEOs’ individual performance. All NEOs participate in the Company’s

Compensation Discussion and Analysis

Compensation Elements for 2023

annual performance management process. At the beginning of the year, in consultation with the CEO, each executive sets individual and business unit or functional goals as part of performance planning. At the end of the year, performance is assessed based both on the executive’s achievement of his set goals and the extent to which that executive demonstrated throughout the year the Company’s core values of safety, customer focus, people, integrity and excellence. The assessment of executive performance against the Company’s values, which are fundamental to our Company’s culture, and to our corporate responsibility initiatives, is a key component of each individual’s annual performance evaluation. The Committee believes the fact that all employees that participate in our AIP are annually evaluated for the extent to which their work embodies our values is a key part of mitigating our overall compensation risk.

Mr. Petras evaluated the performances of Mr. Lyons, Mr. Rutz and Mr. Dimitrief and made a recommendation to the LDC Committee regarding the level of individual performance each executive achieved relative to his set goals and the embodiment of our values. The Board evaluated Mr. Petras’ performance and considered the CEO’s recommendation regarding the individual achievement levels of the other NEOs. Based on performance related to their 2023 goals, Mr. Dimitrief received 110% of his individual performance target as a result of his exceptional leadership of our legal and government affairs teams. Mr. Petras also received 110% of his individual performance target, and Mr. Rutz received 100% of his individual performance target. Mr. Lyons received 100% of his individual performance target prorated to his start date in 2023. The following table provides further detail about the 2023 annual bonus opportunity and payout under our AIP for each NEO:

Long-Term Equity Incentive Compensation

Consistent with our compensation philosophy, we use equity incentive compensation to incentivize long-term value creation and align our executives’ interests with those of our shareholders. The LDC Committee also uses equity incentive compensation to attract and retain talent. In 2023, we granted the following types of equity awards to our named executive officers:

2023 Annual Equity Awards. As described above, in “2023 Compensation Decisions,” in March 2023, the LDC Committee recommended long-term equity incentive awards to each NEO we employed as of March 2023 (except for Mr. Dimitrief and Mr. Biehl) considering, among other things, the executive’s 2022 performance and contributions to the Company’s key short- and long-term strategic goals, the executive’s experience, skills and expected future contributions, and peer group data (the “March 2023 Annual Equity Awards”). The Board, upon the recommendation of the LDC Committee approved the March 2023 Annual Equity Awards for the non-CEO NEOs and, without the involvement of the CEO, approved the CEO’s March 2023 Annual Equity Award.

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Compensation Discussion and Analysis

Compensation Elements for 2023

The target long-term incentive mix for the March 2023 Annual Equity Awards was 50% stock options and 50% RSUs. As explained above, the LDC Committee continues to believe that a combination of stock options and RSUs tightly aligns executives’ incentive opportunities with the creation of shareholder value. Stock options provide value only to the extent that stock price rises, and RSUs help bolster the retention attributes of the program, which are critical in Sotera Health’s continued environment of challenging and variable operating conditions. Also as noted above, the LDC Committee takes the input of shareholders seriously, and consistent with feedback provided by shareholders following the 2023 say-on-pay vote, is considering the mix of our LTI vehicles and the possibility of incorporating performance metrics in future LTI awards. This consideration includes an assessment of the possibility of adding a range of potential financial objectives and relative TSR.

Upon the commencement of his service in June 2023, Mr. Lyons became eligible to participate in the long-term equity incentive program with a target long-term incentive mix of 50% stock options and 50% RSUs, consistent with our overarching pay philosophy and the awards of other top executives. His 2023 Annual Equity Award target value was prorated from the start of his service on June 26, 2023. Beginning in 2024, Mr. Lyons will participate in our annual long-term equity award grant cycle on the same schedule as the other NEOs.

The table below indicates the target value of the executive’s 2023 Annual Equity Award.

Replacement Equity Award. On August 7, 2023, in connection with his joining the Company and appointment as Chief Financial Officer, Mr. Lyons was granted an equity award of RSUs with a grant date fair value of $1,000,000 that replaced foregone long-term incentives from his prior employer. The award will vest in substantially equal yearly installments on each of the first three anniversaries of the date of grant, subject to his continued employment in good standing with the Company through each applicable vesting date.

The following sections further describe the equity incentive compensation awarded to our NEOs under the Sotera Health Company 2020 Omnibus Incentive Plan (“2020 Incentive Plan”) in 2023.

Calculation of Equity Awards

When granting equity awards, we use formulas to calculate the number of RSUs and stock options to be granted to our employees based on the target value of the award. When granting RSUs, we determine the number of shares of stock to be granted by dividing the target award value by the closing sales price on the date of grant as quoted on the Nasdaq stock exchange (the “Fair Market Value”). When granting stock options, we divide the target value by the product of a specified multiplier and the Fair Market Value of our common stock. The specified multiplier is calculated as the product of the fair value of the option award as computed using the Black-Scholes Option Pricing Model prior to the grant date and the Fair Market Value of our common stock.

Stock Options

The Committee believes stock option awards are an appropriate long-term incentive vehicle because they offer an immediate link between shareholder value creation and executive rewards, and because share price needs to rise for the option holder to receive any value from the award. As such, options directly tie executives’ realizable pay opportunities to the creation of shareholder value.

Compensation Discussion and Analysis

Compensation Elements for 2023

The 2023 Annual Equity Awards were comprised of approximately 50% stock options to purchase shares of our common stock. The table below shows the number of stock options granted to Mr. Petras and Mr. Rutz on March 6, 2023 and to Mr. Lyons on August 7, 2023. The options granted as 2023 Annual Equity Awards vest in equal annual installments over a three-year vesting period. Continued service of the executive during the vesting period is generally required. The option awards have a contractual term of 10 years.

The exercise price of each option award granted in 2023 is the closing share price of our common stock on the date the stock options were granted. Please refer to “Potential Payments Upon Termination or Change in Control” on page 50 for more information regarding the post-employment treatment of each NEO’s unvested option awards. For a description of grant date fair values related to stock options granted to our NEOs in 2023, and related valuation assumptions, see note 4 to the Summary Compensation Table.

Restricted Stock Units

RSUs enhance the linkage between shareholder value creation and executive rewards and the value of an RSU is directly tied to our stock price. In addition, RSUs are a powerful retention incentive vehicle and are therefore especially critical to a company like Sotera that faces unique operating challenges and volatility. Each RSU represents the right to receive one share of our common stock.

The 2023 Annual Equity Awards were comprised of approximately 50% RSUs. The table below shows the number of RSUs granted to Mr. Petras and Mr. Rutz on March 6, 2023 and to Mr. Lyons on August 7, 2023. The RSUs granted as 2023 Annual Equity Awards vest in equal annual installments over a three-year period beginning on the first anniversary of the date of grant. Continued service of the executive during the vesting period is generally required.

Mr. Lyons’ replacement equity award granted in August 2023 was comprised of 100% RSUs. The LDC Committee chose to deliver this replacement value 100% in the form of RSUs due to the inability to directly replace the pay-for-performance attributes of Mr. Lyon’s forfeited awards from his previous employer, and to maximize the retentive power of the award. The table below shows the number of replacement RSUs granted to Mr. Lyons in August, 2023. Mr. Lyons’ replacement RSUs vest in equal annual installments over a three-year period beginning on the first anniversary of the date of grant. Continued service of the executive during the vesting period is generally required.

Please refer to “Potential Payments Upon Termination or Change in Control” on page 50 for more information regarding the post-employment treatment of each NEO’s unvested equity awards.

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Compensation Discussion and Analysis

Compensation Elements for 2023

Retirement Plans

To offer competitive total rewards that align with practices among our talent competitors, we maintain a tax-qualified 401(k) savings plan (the “401(k) Plan”), in which all U.S. employees, including our NEOs, are eligible to participate. The 401(k) Plan allows participants to contribute up to 100% of their pay on a pre-tax basis (or on a post-tax basis, with respect to elective Roth deferrals) into individual retirement accounts, subject to the maximum annual limits set by the Internal Revenue Service. We have historically made annual contributions to employee 401(k) accounts of up to 4.5% of an employee’s contributions to the 401(k) Plan. In 2023, we contributed up to $14,850 per employee. Participants are immediately fully vested in both their own contributions and our contributions to the 401(k) Plan.

Additionally, we maintain a non-qualified deferred compensation plan (the “Supplemental Retirement Benefit Plan”) under which a select group of management and highly compensated employees, including all our NEOs, are permitted to supplement contributions made under the 401(k) Plan by deferring up to 50% of their bonus or salary. Although permitted by the Supplemental Retirement Plan, we have not previously provided matching employer contributions under this plan. Participants in the Supplemental Retirement Benefit Plan are permitted to elect to invest their accounts in the same investment options as are available under the 401(k) Plan. Distributions from the Supplemental Retirement Benefit Plan will be made on the earlier of (i) the Participant’s termination of employment with us, or (ii) a specified date at least two years from the time of deferral selected by the Participant at the time of deferral.

Contributions to our Supplemental Retirement Benefit Plan are described beginning on page 46 in the Non-Qualified Deferred Compensation Table. Of our NEOs, only Mr. Rutz participates in the Supplemental Retirement Benefit Plan.

Other Benefits and Perquisites

Our NEOs are eligible to participate in the same employee benefits generally available to all full-time employees on the same basis as these benefits are generally made available to all other Company employees. The LDC Committee believes these benefits are competitive with similar arrangements among our talent competitors, and thereby help support the recruitment and retention of critical executive talent. These benefits include medical and dental insurance, life insurance, and short- and long-term disability insurance. In 2023, the Company provided paid executive physical examinations for Mr. Petras and Mr. Rutz. Please see page 43 and note 6 to “All Other Compensation” in the Summary Compensation Table for details regarding the value of these perquisites.

Other Compensation Policies and Practices

Employment Arrangements

Although our NEOs are employed “at-will” and their employment can be terminated at any time for any reason with or without cause, the Company is party to employment agreements with Mr. Petras and Mr. Rutz, and offer letters and restrictive covenants agreements with Mr. Biehl, Mr. Dimitrief and Mr. Lyons. The employment agreements with Mr. Petras and Mr. Rutz and the offer letter with Mr. Lyons contain severance provisions, and the employment agreement with Mr. Petras contains “double-trigger” change in control provisions for the vesting of any portion of Mr. Petras’ unvested IPO Equity Award and any future equity awards in the event Mr. Petras is terminated without cause or resigns for good reason within 1 year following a change in control. The LDC Committee believes severance provisions assist us in attracting and retaining executive talent and that change in control provisions are appropriate to help ensure continuity of management during a potential change in control.

Additional detail regarding each NEO’s employment arrangements is provided in the sections “Employment Agreements” on page 47, and “Potential Payments Upon Termination or Change in Control” on page 50.

Policy Regarding Prohibition on Hedging and Pledging

We have adopted an Insider Trading Policy which provides that insiders, including executive officers and members of our Board, all employees at the Company’s global headquarters at 9100 South Hills Blvd, Suite 300, Broadview Heights, Ohio

Compensation Discussion and Analysis

Other Compensation Policies and Practices

and others reasonably expected to have access to material non-public information, are prohibited from entering into hedging or monetization transactions with respect to our securities, including zero-cost collars, equity swaps, exchange funds and forward sale contracts; holding our securities in a margin account; pledging our securities as collateral for a loan, unless approved in advance; short selling our securities; and engaging in any transaction in publicly traded options in our securities, including puts or calls or other derivative securities.

Stock Ownership Guidelines

To further align the interests of our senior executive team, executive officers and directors with those of our shareholders, in March 2021, the LDC Committee adopted stock ownership guidelines. Within five years of becoming subject to the guidelines, our senior executive team is expected to hold Company stock valued at the following multiple of their annual base salary: five-times annual base salary for our CEO and two-times annual base salary for each of our other NEOs and other members of the senior executive team. Our non-employee directors are expected to hold Company stock valued at five-times their annual cash retainer within five years of becoming subject to the guidelines. Consistent with typical practices, we count shares underlying RSUs and shares of unvested restricted stock which are subject to time-based vesting requirements as owned shares for purposes of these guidelines but do not count shares underlying stock options or shares of unvested restricted stock which are subject to performance-based vesting requirements as owned shares. The Committee monitors compliance with these guidelines on an annual basis.

Mr. Petras, Mr. Dimitrief, Mr. Rutz, Mr. Chen, Mr. Cunningham, Mr. Donnini, Mr. Mihas, Mr. Neary, Ms. Klee, Mr. Knauss and Mr. Petrella complied with our stock ownership guidelines as of March 31, 2023, and Mr. Lyons and Dr. Wheadon complied as of August 7, 2023. Our other non-employee directors are on track to meet the ownership guidelines within the time required. Mr. Biehl was not expected to comply with the guidelines due to the interim nature of his appointment.

Clawback Policy

In September 2023, the LDC Committee approved a new Policy for the Recovery of Erroneously Awarded Compensation (the “Clawback Policy”) to comply with the final clawback rules adopted by the SEC under Section 10D and Rule 10D-1 of the Securities Exchange Act of 1934, as amended, and the associated listing standards of the Nasdaq. Effective October 2, 2023, the Company is required to claw back erroneously awarded incentive-based compensation from current and former executive officers of the Company (“Covered Officers”) if the Company is required to prepare an accounting restatement. The recovery of such compensation under the Clawback Policy applies regardless of whether a Covered Officer engaged in misconduct or otherwise caused or contributed to the requirement of an accounting restatement. The LDC and Audit Committees will oversee the administration of the Clawback Policy. The foregoing summary of the Clawback Policy does not purport to be complete and is qualified in its entirety by reference to the full text of the Clawback Policy, which may be found at Exhibit 97 of the Company’s Annual Report on Form 10-K for the year ended December 31, 2023.

Compensation Risk Considerations

In consultation with Exequity, the LDC Committee has reviewed our compensation program to assess whether it presents risks that are reasonably likely to have a material adverse effect on the Company. In particular, the Committee has reviewed and considered our compensation policies and practices, including our mix of short- versus long-term incentives; cash- versus stock-based awards; stock ownership guidelines; assessment of individual performance against Company values; and the independent Board oversight of our compensation program. Based on this review, the Committee agreed with Exequity’s assessment that the compensation program does not present risks that are reasonably likely to have a material adverse effect on the Company. Our LDC Committee conducts this assessment annually.

Policies and Practices Regarding Equity Awards

The Company does not grant equity awards when in possession of material non-public information. Generally, our broad-based equity awards will be granted at approximately the same time each year following our release of full-year financial results. When equity grants are approved outside of our regular annual cycle (for example, in connection with a new hire, promotion or retention incentive), grants are made following the release of our next quarterly financial results. Stock options are granted only with an exercise price equal to the closing price of the Company’s stock on the date of grant.

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Compensation Discussion and Analysis

Other Compensation Policies and Practices

Deductibility of Compensation

Prior to the effectiveness of the Tax Cuts and Jobs Act of 2017 (the “Tax Act”), Section 162(m) of the Internal Revenue Code (“Section 162(m)”) imposed an annual deduction limit of $1 million on the amount of compensation paid to both the chief executive officer and certain other named executive officers. The deduction limit did not apply to performance-based compensation satisfying the requirements of Section 162(m). Effective in fiscal year 2018, the Tax Act eliminated the Section 162(m) provisions exempting performance-based compensation from the $1 million deduction limit for compensation granted or materially modified after November 2, 2017. While the LDC Committee will take into account the tax and accounting implications (including with respect to the expected lack of deductibility under the revised Section 162(m)) when making compensation decisions, it reserves the right to make compensation decisions based on other factors if the LDC Committee determines it is in its best interests to do so and as a result, some of the compensation paid to our NEOs may not be deductible.

Accounting for Stock-Based Compensation

We account for stock-based payments, including payments under our 2020 Incentive Plan, in accordance with FASB ASC Topic 718, “Stock Compensation.”

Compensation Committee Interlocks and Insider Participation

None of the members of our LDC Committee is or has been an officer or employee of our Company. None of our executive officers currently serves, or in the past year has served, as a member of the board of directors or compensation committee (or other board committee performing equivalent functions) of any entity that has one or more executive officers serving on our Board or LDC Committee.

Compensation Committee Report

The Leadership Development and Compensation Committee of the Board has reviewed and discussed with management the Company’s Compensation Discussion and Analysis. Based on this review and discussion, the Leadership Development and Compensation Committee has recommended to the Board that the Compensation Discussion and Analysis be included in this Proxy Statement and incorporated into the Company’s Annual Report on Form 10-K for the year ended December 31, 2023.

Respectfully submitted,

The Leadership Development and Compensation Committee

James C. Neary, Chair

Constantine S. Mihas

Compensation Tables

Summary Compensation Table

COMPENSATION TABLES

Summary Compensation Table

The following table presents summary information regarding the total compensation that was awarded to, earned by or paid to our Named Executive Officers during the years ended December 31, 2021, December 31, 2022 and December 31, 2023:

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Compensation Tables

Summary Compensation Table

Grants of Plan-Based Awards

The following table sets forth information regarding plan-based awards granted to each of our NEOs during the fiscal year ended December 31, 2023. Each RSU and stock option award was granted under our 2020 Incentive Plan. Mr. Biehl was not granted any plan-based awards in 2023.