Fostering imagination • Enabling creative exploration • Focus on customers’ sustainability • Driving long-term revenue growth ColorWorks Avient Corporation 21 • Rapid customer response • Immediate color measurement and quotation • Fast track product development to “now” • Specialized labs for fast sample delivery • Optimized formulations leveraging cost effective raw materials C U S T O M E R - F O C U S E D C O L O R F O R M U L A T I O N Avient Corporation 22 InstaColr CycleWorks A D V A N C I N G T H E C I R C U L A R E C O N O M Y • Laboratory mimics real-world circular recycling in a research environment • Conducts chemistry testing to improve plastics recycling for customers • Screening and evaluation of additive and colorant systems during recycling • Collaboration platform for customers and value chain partners Avient Corporation 23 Avient Corporation 24 Michael Garratt and Walter Ripple Our Sustainability Promise As the world’s premier provider of specialized polymer materials, services and solutions, Avient is committed to meeting the needs of the present without compromising future generations’ ability to meet their needs.

Người giám sát của mình hoặc bất kỳ quản lý nào của Avient; • Nhân viên phụ trách về Đạo đức Doanh nghiệp qua email tại địa chỉ ethics.officer@avient.com • Trưởng phòng Pháp chế của Avient qua email tại địa chỉ legal.officer@avient.com • Bất kỳ nhân viên nào của phòng Pháp chế • Đường dây nóng về Đạo đức của Avient Đường dây nóng về Đạo đức của Av ient Đường dây nóng về đạo đức có sẵn trên toàn cầu với 20 ngôn ngữ, hoạt động 24 giờ một ngày, 7 ngày một tuần, qua điện thoại và qua trang web.

ADVISORY VOTE 24 PROXY STATEMENT 2024 | Annual Meeting of Shareholders PROPOSAL 3 — RATIFICATION OF THE APPOINTMENT OF ERNST & YOUNG LLP ("EY") AS OUR INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM FOR THE FISCAL YEAR ENDING DECEMBER 31, 2024 The Audit Committee has appointed EY as our independent registered public accounting firm to audit our consolidated financial statements for the fiscal year ending December 31, 2024. Beggs, the stock awards reflect RSUs that were granted in recognition of her appointment as Senior Vice President, Chief Financial Officer on August 24, 2020, and which vested on August 24, 2023.

多語種道德熱線每週 7 天、每天 24 小時面向全球 開通，您可以在網上舉報，或撥打電話進行舉報。 內部聯繫方式 — 道德與合規資源 如需更多有關本準則或公司之期望的資訊，請直接聯繫下列資源： • 您的主管或 Avient 的任何經理 • 您的人力資源代表或人力資源部 • 企業道德官員 • 法務部的任何職員 • 具有相關專業知識的職能部門（例如企業財務部、內部審計部、採購部） 如有以下情況，請致電或使用道德熱線： • 您需要建議或有疑問 • 您希望報告問題或顧慮 • 您已報告問題或顧慮，但不滿意 • 你不確定從哪裡獲取資訊 • 您覺得本準則列出的某個資源不便於您使用 道德熱線面向全球，每週 7 天、每天 24 小時以超過 20 種語言提供服務。

发布日期：2024 年 10 月 目录 介绍 : 首席执行官寄语 1 道德行为指南 3 个人价值观 3 您的责任 4 Avient 主管和经理的其他责任 4 解决问题和举报违规情况 5 道德热线 5 禁止打击报复 6 《行为准则》的适用范围 6 违反本准则的行为 6 多元和包容 8 歧视或骚扰 8 工作场所关系 9 物质滥用 10 人身安全和 工作场所暴力 10 准确的信息、数据和记录 12 会计诚信 12 公司通讯 14 资产的保护和使用 14 专有和机密信息、 创意和知识产权 15 隐私、个人信息和数据保护 16 互联网和电子邮件的使用 16 社交媒体和社交网络 17 计算机安全、软件许可和版权 17 内幕信息和内幕交易 18 政治献金/活动和慈善捐赠 19 政府调查和询查 19 公平交易 21 贿赂和回扣 21 代理人和顾问 22 竞争 22 礼品和招待 23 利益冲突 24 假公济私 25 国际贸易 25 洗钱 25 可持续性 27 安全、健康和环境 28 产品和服务的安全 29 尊重人权 29 共同的承诺 29 我们的政策 30 内部联系方式 30 道德热线 30 首席执行官寄语 各位 Avient 团队成员： 在当今错综复杂、互联互通的世界中，我们公司的决策影响深远。 行为准则》 | 24 mailto:https://secure.ethicspoint.com/domain/media/en/gui/49178/index.html?

Etyki 5 Zakaz podejmowania działań odwetowych 6 Stosowanie kodeksu postępowania 6 Naruszenia postanowień kodeksu 6 Szacunek dla wszystkich Równość szans 8 Dyskryminacja albo nękanie 8 Relacje w miejscu pracy 9 Nadużywanie substancji psychoaktywnych 10 Bezpieczeństwo i przemoc w miejscu pracy 10 Dokładne informacje, dane i dokumenty 12 Uczciwość księgowa 12 Komunikacja spółki 14 Ochrona i korzystanie z aktywów 14 Informacje zastrzeżone i poufne, pomysły i własność intelektualna 15 Prywatność, dane osobowe i ochrona danych 16 Informacje o korzystaniu z internetu i poczty elektronicznej 16 Media i portale społecznościowe 17 Bezpieczeństwo komputerów, licencjonowane oprogramowanie i prawa autorskie 17 Informacje wewnętrzne oraz obrót papierami wartościowymi na podstawie informacji poufnych 18 Datki na cele polityczne/ charytatywne oraz działalność polityczna 19 Czynności wyjaśniające prowadzone przez organy rządowe i zapytania ze strony organów rządowych 19 Uczciwość w działalności biznesowej Uczciwe prowadzenie działalności handlowej 21 Łapówki i nielegalne prowizje 21 Agenci i konsultanci 22 Konkurencja 22 Upominki oraz przejawy gościnności 23 Konflikty interesów 24 Wykorzystanie informacji poufnych 25 Handel międzynarodowy 25 Pranie pieniędzy 25 Społeczna odpowiedzialność biznesu Zrównoważony rozwój 27 Bezpieczeństwo, zdrowie i ekologia 28 Bezpieczeństwo produktów i usług 29 Przestrzeganie praw człowieka 29 Wspólne zobowiązanie 29 Dane kontaktowe 30 Nasze zasady 30 Osoby do kontaktu wewnątrz spółki 30 Infolinia ds. etyki 30 Przesłanie od dyrektora generalnego Drodzy członkowie zespołu Avient, Decyzje naszej firmy mają daleko idące konsekwencje w dzisiejszym złożonym i wzajemnie powiązanym świecie. KODEKS POSTĘPOWANIA | 24 NASZ KODEKS SZACUNEK DLA UCZCIWOŚĆ W DZIAŁALNOŚCI SPOŁECZNA ODPOWIEDZIALNOŚĆ Wykorzystanie informacji poufnych Możliwości biznesowe, o których pracownik dowie się podczas pracy na rzecz avient na podstawie należących do spółki informacji i mienia oraz zajmowanego w niej stanowiska, są własnością avient.

As of December 31, 2022, Avient employed approximately 9,700 people, 34% of which were located in the U.S. and Canada, 35% were located in Europe, Middle East, and Africa, 24% were located in Asia, and 7% were located in Latin America. 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 24 PROXY STATEMENT 2023 | Annual Meeting of Shareholders 2022 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.” Beggs joined the Company on August 24, 2020, after the grant date for these awards, and therefore did not participate in the 2020-2022 Long-Term Incentive Program. 70 PROXY STATEMENT 2023 | Annual Meeting of Shareholders 2020 – 2022 Cash-Settled Performance Units—Performance Measure: Adjusted EPS* Performance Periods Weighting Threshold Target Maximum Result Payout % January 1, 2020 – December 31, 2020 25% $1.76 $1.83 $1.96 $1.90 158% January 1, 2021 – December 31, 2021 25% $1.83 $1.98 $2.27 $3.05 200% January 1, 2022 – December 31, 2022 25% $1.66 $1.89 $2.36 $2.93 200% January 1, 2020 – December 31, 2022 25% $5.25 $5.70 $6.59 $7.88 200% Total Attainment 189% * All financial measures (performance measures and results) reported in the table above were calculated with adjustments for acquisitions, divestitures and special items (as noted on Appendix A) pursuant to the terms of the program and as approved by the Compensation Committee.

Portage, 14.Donora, Plants) 18.Pune, India Wisconsin (4) (6) Pennsylvania (4) 19.Pamplona, Spain 16.Ripon, Wisconsin (4) Cape Girardeau, 20.Bangkok, Thailand 17.Salisbury, Missouri (1) (4) 21.Pudong (Shanghai), Maryland (4) 15.Ramos Arizpe, China 18.Sheboygan Falls, Mexico (4) 22.Jeddah, Wisconsin (4) (15 Manufacturing Saudi Arabia (5) 19.Stamford, Plants) Shenzhen, China (1) Connecticut (4) 23.Tianjin, China 20.Warsaw, Indiana (4) 24.Novo Hamburgo, 21.Wichita, Kansas (4) Brazil 22.Grandby, Canada (4) 25.Berea, Ohio Ramos Arizpe, 26.Richland Hills, Texas Mexico (4) 27.Bethel, Connecticut (22 Manufacturing 28.Barberton, Ohio Plants) 29.Knowsley, United Kingdom 30.Eindhoven, Netherlands 31.Suzhou, China 32.Shanghai, China 33.Itupeva, Brazil 34.Odkarby, Finland Manitowoc, Wisconsin (1) (4) (34 Manufacturing Plants) (1) Facility is not included in manufacturing plants total as it is also included as part of another segment. (2) There are two manufacturing plants located at Suzhou, China. (3) Facility is not included in manufacturing plants total as it is a design center/lab. (4) Facility added in connection with the acquisition of Spartech on March 13, 2013. (5) Facility added in connection with the JE.A. 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 as of September 30, 2011, among PolyOne Corporation, 2011 ColorNewton Inc., ColorMatrix Group, Inc., and Audax ColorMatrix Holdings, LLC (Incorporated by reference to Exhibit 2.1 to PolyOne Corporation’s current report on Form 8-K filed on October 5, 2011, SEC File No. 1-16091). 2.3† 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) 2.4† Asset Purchase Agreement, dated as of March 25, 2013, by and between PolyOne Corporation and Mexichem Specialty Resins Inc. incorporated by reference to Exhibit 2.1 to the Company’s Current Report on Form 8-K filed March 27, 2013, SEC File No. 1-16091) 3.1 Articles of Incorporation (incorporated by reference to Exhibit 3(i) to the Company’s Annual Report on Form 10-K for the fiscal year ended December 31, 2000, SEC File No. 1-16091) 3.2 Amendment to the Second Article of the Articles of Incorporation, as filed with the Ohio Secretary of State, November 25, 2003 (incorporated by reference to Exhibit 3.1a to the Company’s Annual Report on Form 10-K for the fiscal year ended December 31, 2003, SEC File No. 1-16091) 3.3 Regulations (incorporated by reference to Exhibit 3.1 to the Company’s Current Report on Form 8-K filed on July 17, 2009, SEC File No. 1-16091) 4.1 Indenture, dated as of December 1, 1995, between the Company and NBD Bank, as trustee (incorporated by reference to Exhibit 4.3 to The Geon Company’s Annual Report on Form 10-K for the fiscal year ended December 31, 1996, SEC File No. 1-11804) 4.2 Indenture, dated as of September 24, 2010, between the Company and Wells Fargo Bank, N.A., as Trustee (incorporated by reference to Exhibit 4.1 to the Company’s Quarterly Report on Form 10-Q for the quarter ended September 30, 2010, SEC File No. 1-16091) 4.3 First Supplemental Indenture, dated as of September 24, 2010, between the Company and Wells Fargo Bank, N.A., as Trustee (incorporated by reference to Exhibit 4.2 to the Company’s Quarterly Report Form 10-Q for the quarter ended September 30, 2010, SEC File No. 1-16091) 4.4 Indenture, dated February 28, 2013, between PolyOne Corporation and Wells Fargo Bank, National Association, as trustee (incorporated by reference to Exhibit 4.1 to the Company’s Current Report on Form 8-K filed on March 5, 2013, SEC File No. 1-16091) 10.1 Amended and Restated Credit Agreement, dated March 1, 2013, among the Company, PolyOne Canada and certain other subsidiaries of the Company, Wells Fargo Capital Finance, LLC, as administrative agent, Bank of America, N.A. and U.S.

Remi de 10.Shenzhen, China 9.Lehigh, Canada 8.Muncie, Indiana Napierville, 11.Birmingham, Pennsylvania (8 Distribution 9.Newark, New Quebec, Canada Alabama 10.Vonore, Facilities) Jersey 11.Dongguan, China Shanghai, China (3) Tennessee 10.Paulding, Ohio 12.Lockport, New (11 Manufacturing 11.Toluca, Mexico 11.Pleasant Hill, Iowa York Plants) 12.Assesse, Belgium 12.Portage, 13.Ramos Arizpe, 13.Cergy, France Wisconsin Mexico 14.Tossiat, France 13.Ripon, Wisconsin (13 Manufacturing 15.Gyor, Hungary 14.Salisbury, Plants) 16.Kutno, Poland Maryland 17.Pune, India 15.Sheboygan Falls, 18.Pamplona, Spain Wisconsin 19.Bangkok, Thailand 16.Stamford, 20.Pudong Connecticut (Shanghai), 17.Wichita, Kansas China 18.Granby, 21.Jeddah, Saudi Quebec, Canada Arabia Maryland Heights, Shenzhen, China (1) Missouri (3) 22.Tianjin, China (18 Manufacturing 23.Novo Hamburgo, Plants) Brazil 24.Berea, Ohio 25.Richland Hills, Texas 26.Bethel, Connecticut 27.Barberton, Ohio 28.Knowsley, United Kingdom 29.Eindhoven, Netherlands 30.Suzhou, China 31.Shanghai, China 32.Itupeva, Brazil 33.Odkarby, Finland Manitowoc, Wisconsin (1) (33 Manufacturing Plants) (1) Facility is not included in manufacturing plants total as it is also included as part of another segment. (2) There are two manufacturing plants located at Suzhou, China. (3) Facility is not included in manufacturing plants total as it is a design center/lab. 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 as of September 30, 2011, among PolyOne Corporation, 2011 ColorNewton Inc., ColorMatrix Group, Inc., and Audax ColorMatrix Holdings, LLC (Incorporated by reference to Exhibit 2.1 to PolyOne Corporation’s current report on Form 8-K filed on October 5, 2011, SEC File 2.3† 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) 2.4† Asset Purchase Agreement, dated as of March 25, 2013, by and between PolyOne Corporation and Mexichem Specialty Resins Inc. incorporated by reference to Exhibit 2.1 to the Company’s Current Report on Form 8-K filed March 27, 2013, SEC File No. 1-16091) 3.1 Articles of Incorporation (incorporated by reference to Exhibit 3(i) to the Company’s Annual Report on Form 10-K for the fiscal year ended December 31, 2000, SEC File No. 1-16091) 3.2 Amendment to the Second Article of the Articles of Incorporation, as filed with the Ohio Secretary of State, November 25, 2003 (incorporated by reference to Exhibit 3.1a to the Company’s Annual Report on Form 10-K for the fiscal year ended December 31, 2003, SEC File No. 1-16091) 3.3 Regulations (incorporated by reference to Exhibit 3.1 to the Company’s Current Report on Form 8-K filed on July 17, 2009, SEC File No. 1-16091) 4.1 Indenture, dated as of December 1, 1995, between the Company and NBD Bank, as trustee (incorporated by reference to Exhibit 4.3 to The Geon Company’s Annual Report on Form 10-K for the fiscal year ended December 31, 1996, SEC File No. 1-11804) 4.2 Indenture, dated as of September 24, 2010, between the Company and Wells Fargo Bank, N.A., as Trustee (incorporated by reference to Exhibit 4.1 to the Company’s Quarterly Report on Form 10-Q for the quarter ended September 30, 2010, SEC File No. 1-16091) 4.3 First Supplemental Indenture, dated as of September 24, 2010, between the Company and Wells Fargo Bank, N.A., as Trustee (incorporated by reference to Exhibit 4.2 to the Company’s Quarterly Report Form 10-Q for the quarter ended September 30, 2010, SEC File No. 1-16091) 4.4 Indenture, dated February 28, 2013, between PolyOne Corporation and Wells Fargo Bank, National Association, as trustee (incorporated by reference to Exhibit 4.1 to the Company’s Current Report on Form 8-K filed on March 5, 2013, SEC File No. 1-16091) 10.1 Amended and Restated Credit Agreement, dated March 1, 2013, among the Company, PolyOne Canada and certain other subsidiaries of the Company, Wells Fargo Capital Finance, LLC, as administrative agent, Bank of America, N.A. and U.S.

The data importer shall specifically inform the data Updated 08/04/2022 24 exporter in writing of any intended changes to that list through the addition or replacement of sub- processors at least thirty (30) days in advance, thereby giving the data exporter sufficient time to be able to object to such changes prior to the engagement of the sub- processor(s).