IL NOSTRO CODICE DI CONDOTTA DATA DI PUBBLICAZIONE: OTTOBRE 2024 INDICE Introduzione: Un messaggio dal ceo 1 Il nostro Codice di condotta Linee guida per il comportamento etico 3 Valori personali 3 Le vostre responsabilità 4 Responsabilità aggiuntive di supervisori e manager di Avient 4 Risolvere questioni e segnalare situazioni di non conformità 5 Linea di assistenza telefonica sull’etica 5 Non ritorsione 6 Applicazione del codice di condotta 6 Violazioni del codice 6 Rispetto per tutti 7 Diversità e inclusione 8 Discriminazione o molestie 8 Rapporti di lavoro 9 Abuso di sostanze 10 Sicurezza fisica e violenza sul luogo di lavoro 10 Onestà sul lavoro Informazioni, dati e documenti accurati 12 Integrità contabile 12 Comunicazioni aziendali 14 Tutela e uso dei beni 14 Informazioni proprietarie e riservate, idee e proprietà intellettuale 15 Privacy, informazioni personali e protezione dei dati 16 Uso di internet e delle e-mail 16 Social media e social networking 17 Sicurezza informatica, licenze software e copyright 17 Insider trading e informazioni privilegiate 18 Contributi/attività per partiti politici e contributi ad organizzazioni di beneficenza 19 Indagini e inchieste governative 19 Integrità nella nostra attività Trattamento equo 21 Corruzione e mazzette 21 Agenti e consulenti 22 Concorrenza 22 Omaggi e ospitalità 23 Conflitti di interessi 24 Autonegoziazioni 25 Commercio internazionale 25 Riciclaggio di denaro 25 Responsabilità sociale dell’azienda Sostenibilità 27 Sicurezza, salute e ambiente 28 Sicurezza di prodotti e servizi 29 Rispetto dei diritti umani 29 Un impegno condiviso 29 Risorse e informazioni di contatto Le nostre politiche 30 Contatti interni 30 Linea di assistenza telefonica sull’etica 30 Un messaggio dal ceo Cari membri del team Avient, le nostre decisioni aziendali hanno implicazioni di vasta portata nel mondo complesso e interconnesso di oggi. CODICE DI CONDOTTA | 23 INDICE INTRODUZIONE IL NOSTRO CODICE DI CONDOTTA RISPETTO PER TUTTI ONESTÀ SUL LAVORO INTEGRITÀ NELLA NOSTRA ATTIVITÀ RESPONSABILITÀ SOCIALE DELL’AZIENDA RISORSE Conflitti di interessi È importante che tutti i dipendenti di Avient abbiano degli interessi al di fuori del luogo di lavoro.

NOSSO CÓDIGO DE CONDUTA DATA DE EMISSÃO: OUTUBRO DE 2024 SUMÁRIO Introdução: Mensagem do CEO 1 Nosso Código de Conduta Orientações para comportamento ético 3 Valores pessoais 3 Suas responsabilidades 4 Responsabilidades adicionais de supervisores e gerentes da Avient 4 Solução de dúvidas e comunicação de situações de não conformidade 5 Linha direta de ética 5 Nenhuma retaliação 6 Aplicação do Código de Conduta 6 Violações do Código 6 Respeito por todos Diversidade e inclusão 8 Discriminação ou assédio 8 Relacionamentos no local de trabalho 9 Abuso de substância 10 Segurança física e violência no local de trabalho 10 Honestidade no trabalho Informações, dados e registros precisos 12 Integridade da contabilidade 12 Comunicações da empresa 14 Proteção e uso de ativos 14 Informações exclusivas e confidenciais, ideias e propriedade intelectual 15 Privacidade, informações pessoais e proteção de dados 16 Uso de internet e e-mail 16 Mídias sociais e redes sociais 17 Segurança do computador, licenciamento de software e direitos autorais 17 Informações privilegiadas e transações com informações privilegiadas 18 Contribuições/atividades políticas e contribuições para caridade 19 Investigações e consultas do governo 19 Integridade em nossos negócios Negociação justa 21 Suborno e propinas 21 Agentes ou consultores 22 Concorrência 22 Presentes e hospitalidade 23 Conflitos de interesses 24 Autonegociação 25 Comércio internacional 25 Lavagem de dinheiro 25 Responsabilidade social corporativa Sustentabilidade 27 Segurança, saúde e meio ambiente 28 Segurança de produtos e serviços 29 Respeito pelos direitos humanos 29 Um compromisso compartilhado 29 Recursos e informações de contato Nossas políticas 30 Contatos internos 30 Linha direta de ética 30 Mensagem do CEO Prezada equipe da Avient, As decisões da nossa empresa têm implicações de longo alcance no mundo complexo e interconectado de hoje. CÓDIGO DE CONDUTA | 23 SUMÁRIO INTRODUÇÃO NOSSO CÓDIGO DE CONDUTA RESPEITO POR TODOS HONESTIDADE NO TRABALHO INTEGRIDADE EM NOSSOS NEGÓCIOS RESPONSABILIDADE SOCIAL CORPORATIVA RECURSOS Conflitos de interesses É importante que todos os colaboradores da Avient tenham interesses fora do local de trabalho.

ONZE GEDRAGSCODE UITGEGEVEN: OKTOBER 2024 INHOUDSOPGAVE Inleiding: Een Bericht van de CEO 1 Onze gedragscode Richtlijnen voor ethisch gedrag 3 Persoonlijke waarden 3 Uw verantwoordelijkheden 4 Bijkomende verantwoordelijkheden voor supervisors en managers van Avient 4 Vragen oplossen en het melden van niet in overeenstemming zijnde situaties 5 Ethiekhotline 5 Geen vergelding 6 Toepassing van de Gedragscode 6 Overtredingen van de code 6 Respect voor iedereen Diversiteit en inclusie 8 Discriminatie of pesterijen 8 Relaties op de werkplek 9 Drugmisbruik 10 Fysieke beveiliging en geweld op de werkplek 10 Eerlijkheid op het werk Nauwkeurige informatie, gegevens en dossiers 12 Boekhoudkundige integriteit 12 Bedrijfscommunicatie 14 Beveiliging en gebruik van middelen 14 Eigendomsrechtelijke en vertrouwelijke informatie, ideeën en intellectueel eigendom 15 Privacy, persoonsgegevens en gagevensbescherming 16 Gebruik van internet en e-mail 16 Sociale media en sociale netwerken 17 Computerbeveiliging, softwarelicenties en copyrights 17 Handel met voorkennis 18 Politieke bijdragen/activiteiten en liefdadigheidsbijdragen 19 Overheidsonderzoeken en vragen 19 Integriteit in ons zakendoen Eerlijk Handelen 21 Omkoping en smeergeld 21 Vertegenwoordigers en consulenten 22 Concurrentie 22 Geschenken en gastvrijheid 23 Belangenverstrengeling 24 Zelf Handelen 25 Internationale handel 25 Witwassen 25 Sociale verantwoordelijkheid van het bedrijf Duurzaamheid 27 Veiligheid, gezondheid en milieu 28 Product-en dienstveiligheid 29 Respecteren van mensenrechten 29 Een gedeelde toewijding 29 Hulpbronnen en contactinformatie Ons beleid 30 Interne contacten 30 Ethiekhotline 30 Een Bericht van de CEO Beste Avient-team, Onze bedrijfsbeslissingen hebben verstrekkende implicaties in de complexe en onderling verbonden wereld van vandaag. GEDRAGSCODE | 23 INHOUDSOPGAVE INLEIDING ONZE GEDRAGSCODE RESPECT VOOR IEDEREEN EERLIJKHEID OP HET WERK INTEGRITEIT IN ONS ZAKENDOEN SOCIALE VERANTWOORDELIJKHEID VAN HET BEDRIJF HULPBRONNEN Belangenverstrengeling Het is belangrijk dat alle medewerkers van Avient interesses hebben buiten de werkplek om.

NOTRE CODE DE CONDUITE ÉMISE LE : OCTOBRE 2024 TABLE DES MATIÈRES Introduction: Un message du président-directeur général 1 Notre Code de conduite Directives pour un comportement éthique 3 Valeurs personnelles 3 Vos responsabilités 4 Responsabilités supplémentaires des superviseurs et managers d’Avient 4 Résoudre les questions et signaler les situations de non- conformité 5 Ligne d’assistance liée à l’éthique 5 Non-represailles 6 Application du code de conduite 6 Violations du code 6 Respect pour tous Diversite et inclusion 8 Discrimination ou harcèlement 8 Relations sur le lieu de travail 9 La toxicomanie/l’alcoolisme 10 Sécurité physique et violence sur le lieu de travail 10 Honnêteté au travail Exactitude des informations, données et archives 12 Intégrité comptable 12 Communications de la société 14 Protection et utilisation des actifs 14 Informations exclusives et confidentielles ; idées et propriété intellectuelle 15 Protection de la sphère privée, des informations et données personnelles 16 Utilisation d’internet et des courriers électroniques 16 Médias sociaux et réseaux sociaux 17 Sécurité informatique, licences logicielles et copyrights 17 Délit d’initié 18 Contributions/activités politiques et contributions caritatives 19 Enquêtes et demandes de renseignements du gouvernement 19 Intégrité dans notre activité Traitement equitable 21 Corruption et pots-de-vin 21 Agents et consultants 22 Concurrence 22 Cadeaux et marques d’hospitalite 23 Conflits d’intérêts 24 Transactions intéressées 25 Commerce international 25 Blanchiment d’argent 25 Responsabilité sociale d’entreprise Durabilite 27 Sécurité, sante et environnement 28 Sécurité des produits et des services 29 Respect des droits de l’homme 29 Un engagement partage 29 Ressources et coordonnées Nos politiques 30 Contacts internes 30 Ligne d’assistance liée à l’éthique 30 Un message du président-directeur général Chère équipe d’avient, Les décisions de notre entreprise ont des implications considérables dans le monde complexe et interconnecté actuel. CODE DE CONDUITE | 23 TABLE DES MATIÈRES INTRODUCTION NOTRE CODE DE CONDUITE RESPECT POUR TOUS HONNÊTETÉ AU TRAVAIL INTÉGRITÉ DANS NOTRE ACTIVITÉ RESPONSABILITÉ SOCIALE D’ENTREPRISE RESSOURCES Conflits d’intérêts Il est important que tous les collaborateurs d’Avient aient des intérêts en dehors du lieu de travail.

UNSER VERHALTENSKODEX VERÖFFENTLICHT: OKTOBER 2024 INHALTSANGABE Einleitung: Eine Mitteilung des CEO 1 Unser Verhaltenskodex Richtlinien für ethisches Verhalten 3 Persönliche Werte 3 Ihre Verantwortlichkeiten 4 Zusätzliche Pflichten von Vorgesetzten und Managern bei Avient 4 Fragen klären und Situationen mangelnder Compliance melden 5 Ethikhotline 5 Keine Vergeltungmaßnahmen 6 Anwendung des Verhaltenskodex 6 Verstöße gegen den Kodex 6 Respekt für alle Diversität und Inklusion 8 Diskriminierung oder Belästigung 8 Beziehungen am Arbeitsplatz 9 Drogenmissbrauch 10 Physische Sicherheit und Gewalt am Arbeitsplatz 10 Ehrlichkeit bei der Arbeit Korrekte Informationen, Daten und Aufzeichnungen 12 Integrität der Buchführung 12 Unternehmenskommunikationen 14 Schutz und Verwendung von Vermögenswerten 14 Unternehmenseigene und vertrauliche Informationen, Ideen und geistiges Eigentum 15 Privatsphäre, Personenbezogene Daten und Datenschutz 16 Verwendung von Internet und E-Mail 16 Soziale Medien und Soziale Netwerke 17 Computersicherheit, Softwarelizenzierung und Urhberrechte 17 Insiderinformationen und- handel 18 Politische Spended/ Aktivitäten und gemeinnützige Spenden 19 Ermittlungen und Anfragen der Regierung 19 Integrität in unserem Geschäft Ehrliche Handlungsweise 21 Bestechung und Kickbacks 21 Beauftragte und Berater 22 Wettbewerb 22 Geschenke und Bewirtung 23 Interessenkonflikte 24 Selbstkontrahierung 25 Internationaler Handel 25 Geldwäsche 25 Soziale Verantwortung des Unternehmens Nachhaltigkeit 27 Sicherheit, Gesundheit und die Umwelt 28 Produkt-und Dienstleistungssicherheit 29 Achtung der Menschenrechte 29 Eine gemeinsame Selbstverpflichtung 29 Ressourcen und Kontaktinformationen Unsere Richtlinien 30 Interne Kontakte 30 Ethikhotline 30 Eine Mitteilung des CEO Liebes Avient-Team, die Entscheidungen, die wir als Unternehmen treffen, haben in der heutigen komplexen und vernetzten Welt weitreichende Folgen. VERHALTENSKODEX | 23 INHALTSANGABE EINLEITUNG UNSER VERHALTENSKODEX RESPEKT FÜR ALLE EHRLICHKEIT BEI DER ARBEIT INTEGRITÄT IN UNSEREM GESCHÄFT SOZIALE VERANTWORTUNG DES UNTERNEHMENS RESSOURCEN Interessenkonflikte Es ist wichtig, dass alle Avient-Mitarbeiter Interessen außerhalb des Arbeitsplatzes haben.

NUESTRO CÓDIGO DE CONDUCTA FECHA DE PUBLICACIÓN: OCTUBRE DE 2024 ÍNDICE Introducción: Mensaje del director ejecutivo 1 Nuestro Código de conducta Lineamientos para el comportamiento ético 3 Valores personales 3 Sus responsabilidades 4 Responsabilidades adicionales para supervisores y gerentes de Avient 4 Cómo responder preguntas y denunciar situaciones de incumplimiento 5 Línea directa de ética 5 Política antirrepresalias 6 Aplicación del Código de conducta 6 Transgresiones del Código 6 Respeto por todos Diversidad e inclusión 8 Discriminación o acoso 8 Relaciones en el lugar de trabajo 9 Abuso de sustancias 10 Seguridad física y violencia en el lugar de trabajo 10 Honestidad en el trabajo Precisión de la Información, los datos y los registros 12 Integridad en la contabilidad 12 Comunicaciones de la empresa 14 Resguardo y uso de los activos 14 Información de propiedad exclusiva y confidencial, ideas y propiedad intelectual 15 Protección de la privacidad, la información personal y los datos 16 Uso de internet y correo electrónico 16 Medios y redes sociales 17 Seguridad informática, licencias de software y derechos de autor 17 Información privilegiada y tráfico de información 18 Contribuciones/Actividades políticas y contribuciones benéficas 19 Investigaciones y consultas del gobierno 19 Integridad en nuestro negocio Trato justo 21 Sobornos y coimas 21 Agentes y consultores 22 Competencia 22 Regalos y atenciones 23 Conflictos de intereses 24 Actuar en provecho propio 25 Comercio internacional 25 Lavado de dinero 25 Responsabilidad social corporativa Sostenibilidad 27 Seguridad, salud y medioambiente 28 Seguridad de los productos y servicios 29 Respeto por los derechos humanos 29 Compromiso compartido 29 Recursos e información de contacto Nuestras políticas 30 Contactos internos 30 Línea directa de ética 30 Mensaje del director ejecutivo Estimado equipo de Avient: Las decisiones que tomamos en nuestra empresa impactan de manera significativa en el mundo actual, cada vez más complejo e interconectado. CÓDIGO DE CONDUCTA | 23 ÍNDICE INTRODUCCIÓN NUESTRO CÓDIGO DE CONDUCTA RESPETO POR TODOS HONESTIDAD EN EL TRABAJO INTEGRIDAD EN NUESTRO NEGOCIO RESPONSABILIDAD SOCIAL CORPORATIVA RECURSOS Conflictos de intereses Es importante que todos los asociados de Avient tengan intereses fuera del lugar de trabajo.

23. Buyer hereby acknowledge and confirms that the execution of the contract with Seller and the performance thereunder does not constitute an agreement of continuous supply (keizokuteki kyokyu keiyaku) or provide Buyer with such status to obtain continuous supply thereunder. 23.

On October 11, 2011 and October 23, 2012, PolyOne’s Board of Directors increased the common shares repurchase authorization by an additional 5.3 million and 13.2 million, respectively. POLYONE CORPORATION 23 Globalization allows us to service our customers with consistency wherever their operations might be around the world. On October 11, 2011, PolyOne’s Board of Directors increased the common share repurchase authorization amount by 5.3 million and on October 23, 2012 increased the authorization an additional 13.2 million.

If you do business in other countries or with people from other countries, or you travel internationally, consult with Avient’s Legal department for guidance. 23 HOME | TOC Corporate Social Responsibility 24 HOME | TOC Sustainability Associates, customers and suppliers are not the only stakeholders in Avient.

2025 Proxy Statement Table of Contents Page Letter to Shareholders i Notice of 2025 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 2 Advance Voting Methods 2 Voting During the Annual Meeting 3 Questions 3 Our Purpose and Strategic Framework 4 People 4 Products 5 Planet 5 Performance 6 Our Director Nominees and Committee Membership 6 Summary of Director Nominee Skills, Experience and Background 7 Governance Highlights 8 PROPOSAL 1—Election of Twelve Director Nominees to Our Board of Directors 10 PROPOSAL 2—Approval, on an Advisory Basis, of Named Executive Officer Compensation 23 PROPOSAL 3—Ratification of the Appointment of Ernst & Young LLP ("EY") as Our Independent Registered Public Accountant 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 37 Board Tenure 37 2024 Non-Employee Director Compensation 38 Non-Employee Director Compensation Highlights 38 Non-Employee Director Retainer and Meeting Fees 38 2024 Non-Employee Director Compensation Table 39 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 45 What We Pay and Why: Elements of Compensation 47 Other Aspects of Our Compensation Programs 54 Executive Compensation 59 2024 Summary Compensation Table 59 2024 Grants of Plan-Based Awards 62 Outstanding Equity Awards at 2024 Fiscal Year-End 64 2024 Option Exercises and Stock Vested 65 2024 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 76 Risk Assessment of the Compensation Programs 76 Compensation Committee Report 76 Miscellaneous Provisions 77 Appendix A 80 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. As described more fully in the “Compensation Discussion and Analysis” section of this proxy statement, the Compensation Committee of our Board has structured our executive compensation program to achieve the following key objectives: Objective How Our Executive Compensation Program Achieves this Objective Pay-For-Performance Setting a significant portion of each Named Executive Officer’s total compensation in the form of variable compensation that is earned when pre-established financial performance goals are achieved Align Executive Compensation with Shareholders’ Interests Focusing incentive programs on the critical performance measures that determine Avient’s overall success and reward executives for the attainment of short-term results, balanced with the need for sustainable long-term success Attract, Motivate and Retain Management Competing effectively to attract, motivate and retain a management team that leads in setting and achieving the overall goals and objectives of Avient ADVISORY VOTE PROXY STATEMENT 2025 | Annual Meeting of Shareholders 23 We urge shareholders to read the “Compensation Discussion and Analysis” section of this proxy statement, which describes in more detail how our executive compensation policies and procedures operate and are designed to achieve our compensation objectives. OWNERSHIP OF AVIENT SHARES PROXY STATEMENT 2025 | Annual Meeting of Shareholders 41 The following table shows information relating to all persons who are 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 (as of the dates indicated in the footnotes to the table): Name 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 11.3% (1) Based on information contained in a Schedule 13G/A filed by BlackRock, Inc. with the SEC on January 23, 2024.