Okamžitě po odchodu si zapsat čas, místo a zúčastněné strany, zápis podepsat, opatřit datem a předat právnímu oddělení společnosti Avient. ✓ Před uskutečněním obchodu s konkurentem se poradit s právním oddělením společnosti Avient.

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. James Assistant General Counsel and Assistant Secretary Important Notice Regarding the Availability of Proxy Materials for the Annual Meeting of Shareholders to be held on May 16, 2024: The Company's Notice of 2024 Annual Meeting of Shareholders, Proxy Statement, and 2023 Annual Report on Form 10-K are available online at www.proxyvote.com. ii PROXY STATEMENT We are providing the enclosed proxy materials to you in connection with the solicitation by the Board of Directors (the “Board”) of Avient Corporation ("Avient," "Avient Corporation," or the “Company”) of proxies to be voted at the Annual Meeting of Shareholders to be held on Thursday, May 16, 2024 (the “Annual Meeting”), and at any adjournments or postponements thereof. REVOKING A PROXY If you are a shareholder of record, you may revoke your proxy before it is voted by: (i) sending a written notice to our Secretary bearing a later date than the previously delivered proxy, stating that you revoke your proxy; (ii) mailing a completed and signed proxy card bearing a later date than the previously delivered proxy; (iii) voting by telephone or internet at a later date than the previously delivered proxy; or (iv) participating in the Annual Meeting and voting electronically online during the Annual Meeting.

POLYONE CORPORATION12 PART II ITEM 5. The Base Rate is a fluctuating rate equal to the greater of (i) the Federal Funds Rate plus one-half percent, (ii) the prevailing LIBOR Rate plus one percent, and (iii) the prevailing Prime Rate. Off-Balance Sheet Arrangements We have no material off-balance sheet arrangements as defined in Item 303(a)(4)(ii) of Regulation S-K.

He also served as Executive Director, Mergers and Acquisitions of CIBC World Markets (an investment bank in the domestic and international equity and debt capital markets) from 2006 to 2008. 15 AVIENT CORPORATION PART II ITEM 5. The amendment also aligned and reduced the interest rates per annum, which now are either (i) Adjusted Term SOFR (as defined in the Term Loan Amendment) plus 2.50%, or (ii) a Base Rate (as defined in the Term Loan Amendment) plus 1.50%. The amendment also aligned and reduced the interest rates per annum, which now are either (i) Adjusted Term SOFR (as defined in the Term Loan Amendment) plus 2.50%, or (ii) a Base Rate (as defined in the Term Loan Amendment) plus 1.50%.

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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. James Assistant General Counsel and Assistant Secretary Important Notice Regarding the Availability of Proxy Materials for the Annual Meeting of Shareholders to be held on May 16, 2024: The Company's Notice of 2024 Annual Meeting of Shareholders, Proxy Statement, and 2023 Annual Report on Form 10-K are available online at www.proxyvote.com. ii PROXY STATEMENT We are providing the enclosed proxy materials to you in connection with the solicitation by the Board of Directors (the “Board”) of Avient Corporation ("Avient," "Avient Corporation," or the “Company”) of proxies to be voted at the Annual Meeting of Shareholders to be held on Thursday, May 16, 2024 (the “Annual Meeting”), and at any adjournments or postponements thereof. REVOKING A PROXY If you are a shareholder of record, you may revoke your proxy before it is voted by: (i) sending a written notice to our Secretary bearing a later date than the previously delivered proxy, stating that you revoke your proxy; (ii) mailing a completed and signed proxy card bearing a later date than the previously delivered proxy; (iii) voting by telephone or internet at a later date than the previously delivered proxy; or (iv) participating in the Annual Meeting and voting electronically online during the Annual Meeting.

The Operating Council is responsible for oversight of the Sustainability Council, whose charter provides that its ultimate goal is to drive sustainable performance aligned with Avient’s mission and its 4P Strategy, with a focus on Product and Planet. ii. Initiative category & Initiative type Energy efficiency in production processes Electrification Estimated annual CO2e savings (metric tonnes CO2e) 823 Scope(s) Scope 1 Avient CDP Climate Change Questionnaire 2021 Tuesday, August 3, 2021 44 Voluntary/Mandatory Voluntary Annual monetary savings (unit currency – as specified in C0.4) 2,807 Investment required (unit currency – as specified in C0.4) 0 Payback period 4-10 years Estimated lifetime of the initiative 3-5 years Comment Replacement of LPG Gas forktruck with Electric Lithium Ion battery driven forktruck.

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Vice President Human Resources, Alcoa Electrical & Electronic Solutions (a business unit of Alcoa Inc. specializing in the design, development and production of electrical and electronic distribution systems) from 2003 to 2009. 15 AVIENT CORPORATION PART II ITEM 5. For a discussion of changes from fiscal year 2019 to fiscal year 2020, refer to Management’s Discussion and Analysis of Financial Condition and Results of Operations in Part II, Item 7 of our Annual Report on Form 10-K for the year ended December 31, 2020, filed with the SEC on February 25, 2021. The Base Rate is a fluctuating rate equal to the greater of (i) the Federal Funds Rate plus one- half percent, (ii) the prevailing LIBOR Rate plus one percent, and (iii) the prevailing Prime Rate.

Outras Questões Fornecemos nesta Declaração de Privacidade outras informações sobre: (i) websites e serviços de terceiros, (ii) revisões desta Declaração de Privacidade. 11.