W przypadku prowadzenia działalności w innych krajach albo współpracy z osobami z innych krajów bądź podróży zagranicznych należy skonsultować się z działem prawnym Avient celem uzyskania wskazówek dotyczących sposobu postępowania. 23 Spis treści Społeczna odpowiedzialność biznesu 24 Spis treści Zrównoważony rozwój Pracownicy, klienci i dostawcy nie są jedynymi interesariuszami Avient.

Se fate affari in altri Paesi o con persone di altri Paesi, o se fate viaggi internazionali, consultate l’Ufficio Legale di Avient per assistenza. 23 Indice Responsabilità sociale dell’azienda 24 Indice Sostenibilità I dipendenti, i clienti e i fornitori non sono gli unici soggetti interessati di Avient.

Ha más országokkal, más országban élőkkel folytat üzletet, vagy nemzetközi útra készül, tanácsért forduljon az Avient jogi osztályához. 23 Tartalomjegyzék Társadalmi felelősségvállalás 24 Tartalomjegyzék Fenntarthatóság Nem csak a munkatársak, a vevők és a szállítók az Avient kizárólagos érdekelt felei.

Als u zaken doet in andere landen of met mensen van andere landen, of als u internationaal reist, raadpleeg dan de Juridische afdeling van Avient voor richtlijnen. 23 Inhoudsopgave Sociale verantwoordelijkheid van het bedrijf 24 Inhoudsopgave Duurzaamheid Medewerkers, klanten en leveranciers zijn niet de enige belanghebbenden in Avient.

Se você fizer negócios em outros países ou com pessoas de outros países, ou viajar internacionalmente, consulte o departamento jurídico da Avient para obter orientação. 23 Sumário Responsabilidade social corporativa 24 Sumário Sustentabilidade Colaboradores, clientes e fornecedores não são as únicas partes interessadas da Avient.

Diğer ülkelerle veya diğer ülkelerden gelen insanlarla ticaret yapıyorsanız veya uluslararası seyahatlerde bulunuyorsanız yardım almak için Avient’in Hukuk departmanına başvurun. 23 İçindekiler Kurumsal Sosyal Sorumluluk 24 İçindekiler Sürdürülebilirlik Çalışanlar, müşteriler ve tedarikçiler Avient’in tek paydaşları değildir.

2024 Proxy Statement PROXY STATEMENT 2024 NOTICE OF 2024 ANNUAL MEETING OF SHAREHOLDERS AND PROXY STATEMENT TABLE OF CONTENTS Letter to Shareholders i Notice of 2024 Annual Meeting of Shareholders ii Record Date ii Voting Matters and Vote Recommendations ii Proxy Statement 1 Proxy Summary 1 Voting and Meeting Information 1 Attendance and Participation 1 Who is Eligible to Vote 1 Advance Voting Methods 2 Voting During the Annual Meeting 2 Questions 3 Company Operating Performance 3 Our Company Culture 3 The 4Ps of Sustainability at Avient 4 Impact of our Performance on Named Executive Officer 2023 Compensation 8 Our Director Nominees and Committee Membership 10 Summary of Director Nominee Skills, Experience and Background 12 Governance Highlights 14 Proposal 1 - Election of Twelve Director Nominees to Our Board of Directors 16 Proposal 2 - Approval, on an Advisory Basis, of Named Executive Officer Compensation 23 Proposal 3 - Ratification of the Appointment of Ernst & Young LLP as Our Independent Registered Public Accounting Firm for the Fiscal Year Ending December 31, 2024 25 Independent Registered Public Accountant Services and Related Fee Arrangements 25 Report of the Audit Committee 26 Corporate Governance 28 Director Independence 28 Board Leadership Structure 29 Majority Voting for Directors 29 Board Oversight of Risk 29 Board Oversight of ESG and Sustainability Matters 30 Code of Ethics, Code of Conduct, and Corporate Governance Guidelines 31 Related Person Transactions 31 Communication with the Board 32 Board and Committees 32 Board Refreshment and Diversity 37 2023 Non-Employee Director Compensation 38 Non-Employee Director Compensation Highlights 38 Non-Employee Director Retainer and Meeting Fees 38 2023 Non-Employee Director Compensation Table 39 Option Awards Outstanding and Fully Vested Deferred Shares 40 Ownership of Avient Shares 41 Beneficial Ownership of Our Common Shares 41 Stock Ownership Guidelines for Non-Employee Directors 42 Compensation Discussion and Analysis 43 Executive Summary 43 Executive Compensation Philosophy and Objectives 46 What We Pay and Why: Elements of Compensation 48 Other Aspects of our Compensation Programs 54 Executive Compensation 59 2023 Summary Compensation Table 59 2023 Grants of Plan-Based Awards 62 Outstanding Equity Awards at 2023 Fiscal Year-End 64 2023 Option Exercises and Stock Vested 65 2023 Non Qualified Deferred Compensation 65 Potential Payments Upon Termination or Change of Control 66 CEO Pay Ratio Disclosure 71 Pay Versus Performance Disclosure 72 Compensation Committee Interlocks and Insider Participation 75 Risk Assessment of the Compensation Programs 75 Compensation Committee Report 76 Miscellaneous Provisions 77 Internet Availability of Proxy Materials 77 Voting at the Meeting 77 Revoking a Proxy 78 Shareholder Proposals 78 Proxy Solicitation 79 Householding of Proxy Materials 79 Appendix A A-1 In this proxy statement, statements that are not reported financial results or other historical information are “forward-looking statements” within the meaning of the Private Securities Litigation Reform Act of 1995. We believe you should vote “FOR” our Named Executive Officer compensation program and approve the following resolution because the compensation actually earned by our Named Executive Officers for our ADVISORY VOTE PROXY STATEMENT 2024 | Annual Meeting of Shareholders 23 2023 performance was aligned with our pay-for-performance objectives, our Company’s performance and shareholder interests: “RESOLVED, that the compensation paid to Avient’s Named Executive Officers, as disclosed pursuant to Item 402 of Regulation S-K, including the Compensation Discussion and Analysis, compensation tables and related narrative discussion, is hereby APPROVED.” OWNERSHIP OF AVIENT SHARES PROXY STATEMENT 2024 | Annual Meeting of Shareholders 41 The following table shows information relating to all persons who, as of February 28, 2024, were known by us to beneficially own more than five percent of our outstanding common shares based on information provided in Schedule 13Gs and 13Ds filed with the SEC: Name and Address Number of Common Shares % of Class(3) BlackRock, Inc. 50 Hudson Yards New York, New York 10001(1) 11,172,204 12.2% The Vanguard Group 100 Vanguard Boulevard Malvern, Pennsylvania 19355(2) 10,368,900 11.4% (1) Based on information contained in a Schedule 13G/A filed by BlackRock, Inc. with the SEC on January 23, 2024.

Jeddah, Saudi Arabia Shenzhen, China (1) 23. On October 11, 2011 and October 23, 2012, we further announced that our Board of Directors had increased the common shares repurchase authorization by an additional 5.3 million and 13.2 million, respectively. incorporated by reference to Exhibit 2.1 to the Company’s Current Report on Form 8-K filed March 3, 2011, SEC File No. 1-16091) 2.2† Agreement and Plan of Merger, dated October 23, 2012, by and among PolyOne Corporation, 2012 RedHawk, Inc., 2012 RedHawk, LLC and Spartech Corporation (Incorporated by reference to Exhibit 2.1 to PolyOne Corporation’s current report on Form 8-K filed on October 24, 2012, SEC File No. 1-16091) 2.3† Asset Purchase Agreement, dated as of March 25, 2013, by and between PolyOne Corporation and Mexichem Specialty Resins Inc.

2022 Proxy Statement TABLE OF CONTENTS Message from our CEO i Notice of 2022 Annual Meeting of Shareholders ii Record Date ii Voting Matters and Vote Recommendations ii Proxy Statement 1 Proxy Summary 1 Voting and Meeting Information 1 Attendance and Participation 1 Who is Eligible to Vote 1 Advance Voting Methods 2 Voting During the Annual Meeting 2 Questions 3 Company Operating Performance 3 Our Company Culture 4 The 4Ps of Sustainability at Avient 4 Impact of our Performance on Named Executive Officer 2021 Compensation 9 Our Director Nominees and Committee Membership 11 Summary of Director Nominee Skills, Experience and Background 12 Governance Highlights 13 Proposal 1 - Election of Twelve Director Nominees to Our Board of Directors 16 Proposal 2 - Advisory Vote to Approve Named Executive Officer Compensation 23 Proposal 3 - Ratification of the Appointment of Ernst & Young LLP as Our Independent Registered Public Accounting Firm for the Fiscal Year Ending December 31, 2022 25 Independent Registered Public Accountant Services and Related Fee Arrangements 25 Report of the Audit Committee 26 Corporate Governance 28 Director Independence 28 Lead Director 29 Board Leadership Structure 29 Majority Voting for Directors 29 Board Oversight of Risk 29 Board Oversight of ESG and Sustainability Matters 30 Code of Ethics, Code of Conduct and Corporate Governance Guidelines 31 Related Person Transactions 31 Communication with Board 32 Board and Committees 32 Board Refreshment and Diversity 36 2021 Non-Employee Director Compensation 38 Non-Employee Director Compensation Highlights 38 Non-Employee Director Retainer and Meeting Fees 38 2021 Non-Employee Director Compensation Table 39 Option Awards Outstanding and Fully Vested Deferred Shares 40 Ownership of Avient Shares 41 Beneficial Ownership of Our Common Shares 41 Stock Ownership Guidelines for Non-Employee Directors 42 Compensation Discussion and Analysis 43 Executive Summary 43 Executive Compensation Philosophy and Objectives 46 What We Pay and Why: Elements of Compensation 49 Other Aspects of our Compensation Programs 55 Executive Compensation 59 2021 Summary Compensation Table 59 2021 Grants of Plan-Based Awards 61 Outstanding Equity Awards at 2021 Fiscal Year-End 63 2021 Option Exercises and Stock Vested 64 2021 Non Qualified Deferred Compensation 64 Potential Payments Upon Termination or Change of Control 65 CEO Pay Ratio Disclosure 70 Compensation Committee Interlock and Insider Participation 70 Risk Assessment of the Compensation Programs 71 Compensation Committee Report 71 Miscellaneous Provisions 72 Voting at the Meeting 72 Revoking a Proxy 72 Shareholder Proposals 73 Proxy Solicitation 73 Appendix A A-1 i MESSAGE FROM OUR CEO March 29, 2022 Dear Fellow Shareholder: We have decided to hold the Annual Meeting virtually because doing so enables greater shareholder attendance and participation from any location around the world, and reduces the cost and environmental impact of the Annual Meeting. Director since: 2011 Age: 60 Current Public Company Directorships: • Anzu Special Acquisition Corp I Former Directorships: • Ashland • Carpenter • Valvoline ADVISORY VOTE PROXY STATEMENT 2022 | Annual Meeting of Shareholders 23 PROPOSAL 2 — ADVISORY VOTE TO APPROVE NAMED EXECUTIVE OFFICER COMPENSATION As required under the Dodd-Frank Wall Street Reform and Consumer Protection Act and Section 14A of the Securities Exchange Act of 1934 (the “Exchange Act”), our Board is submitting a “Say on Pay” proposal for shareholder consideration.

Wulfsohn 90,000 110,000 200,000 NON-EMPLOYEE DIRECTOR COMPENSATION 23 Fees Earned or Paid in Cash (column (a)) Non-employee Directors may defer payment of all or a portion of their $90,000 annual cash retainer (payable in quarterly installments in arrears), as well as meeting and committee chairperson fees into the Deferred Compensation Plan. McAlindon(2) 22,109 - 22,109 23 Directors and executive officers as a group 1,110,196 271,492(4) 1,381,688 (1) Except as otherwise stated in the following notes, beneficial ownership of the shares held by each individual consists of sole voting power and sole investment power, or of voting power and investment power that is shared with the spouse or other immediate family member of the individual or with certain trusts.