To attend and participate in the Annual Meeting, you will need the 16-digit control number included on your proxy card and/or voting instruction card. You will need the 16-digit control number included on your proxy card and/or voting instruction card. PROXY SUMMARY 16 PROXY STATEMENT 2023 | Annual Meeting of Shareholders PROPOSAL 1 — ELECTION OF TWELVE DIRECTOR NOMINEES TO OUR BOARD OF DIRECTORS Our Board currently consists of 12 Directors.

Jakékoliv podobné akce by měly být předem zkontrolovány právním oddělením společnosti Avient. 16.

El Departamento Jurídico de Avient debe revisar cualquiera de estos programas antes de su implementación. 16.

Minden ilyen programot az Avient jogi osztályának felül kell vizsgálnia annak bevezetése előtt. 16.

Een dergelijk programma moet door de Juridische Afdeling van Avient worden beoordeeld voordat deze wordt geïmplementeerd. 16.

Programas desse tipo devem ser analisados pelo Departamento Jurídico da Avient antes de ser implementado. 16.

V I S I O N PolyOne Corporation 4 To be the world’s premier provider of specialized polymer materials, services and solutions C O R E V A L U E S P E R S O N A L V A L U E S Honesty IntegrityRespect Operational Excellence Commercial Excellence Specialization Globalization Collaboration ExcellenceInnovation To be the world’s premier provider of specialized polymer materials, services and solutions S A F E T Y F I R S T PolyOne Corporation 5 Injuries per 100 Workers Spartech Acquisition 1.3 1.1 1.1 0.85 0.65 0.57 0.54 0.97 0.84 0.74 0.74 0.69 0.51 0.56 2006 2007 2008 2009 2010 2011 2012 2013 2014 2015 2016 2017 2018 2019 C O M M O D I T Y T O S P E C I A L T Y T R A N S F O R M A T I O N PolyOne Corporation 6 • Volume driven, commodity production • Heavily tied to cyclical end markets • Performance largely dependent on non- controlling joint ventures • Shift to value-based selling & an innovative culture • New leadership team appointed • Implementation of four pillar strategy • Investment in commercial training and innovation • Faster growing, high margin focus • Accelerated growth with world class vitality index • Significant commercial resource additions • Expanded margins with specialty focus • Acquired strategic, bolt-on companies to expand technology offerings and improve geographic breadth Volume Value Transformation The Future 2006 - 2013 2013 – 20192000-2005 2006 - 2013 • Landmark portfolio transformation creates specialty growth company • Sustainability / mega- trends drive above market growth 2020 and Beyond PolyOne Corporation 7 P O L Y O N E 2 0 1 9 R E V E N U E | $ 2 . 9 B I L L I O N Segment End Market Geography Transportation 15% Healthcare 15% Industrial 14% Packaging 13% Consumer 12% Wire & Cable 11% Building & Construction 6% Electrical & Electronics 6% Textiles 5% Appliance 3% Color Additives & Inks 34% Distribution 41% Specialty Engineered Materials 25% United States 54% Europe 19% Asia 11% Latin America 11% Canada 5% P R O O F O F P E RFO RMAN CE C O N S E C U T I V E Y E A R S 10 A D J U S T E D E P S E X P A N S I O N PolyOne Corporation 8 $1.69 $1.51 S U S T A I N A B L E P A T H T O D O U B L E - D I G I T E P S G R O W T H PolyOne Corporation 9 P E O P L E P R O D U C T S P L A N E T P E R F O R M A N C E Double digit annual EPS growth Expand specialty portfolio with strategic acquisitions Innovate and develop new technologies and services Repurchase 600K-1M shares annually Increase commercial resources 5-7% annually Double acquired company margins Enhance efficiencies through Lean Six Sigma and commercial excellence 531 710 1,042 130 164 208 504 663 880 2014 2018 2019E PF* R&D / Technical Marketing Sales PolyOne Corporation 10 + 34% + 26% + 32% E X P A N S I O N O F COMMERCIAL RESOURCES D R I V I N G G R O W T H $2.9 $2.9 $3.5 2015 2016 2017 2018 2019E PF Total + 9% Organic + 5% Revenue in Billions Total + 10% Organic + 7%+ 47% + 27% + 33% $4.0 $3.2 2019E PF* * 2019E Pro Forma for PP&S Divestiture and Clariant Masterbatch business Lead Specialists T H E E V O L V I N G C U S T O M E R R E L A T I O N S H I P PolyOne Corporation 11 Expanded Path Traditional Path Strategic Accounts/ Field Sales Business Development Customer Service Web and Social Media Inside Sales PolyOne Corporation 12 Investments in digital and dedicated inside sales to improve customer experience 110% increase in leads (from 6,000 to 12,700) driven by website, phone, and online chat EXPANDED PATH A D D I N G C U S T O M E R T O U C H P O I N T S 4 33 2014 2019 Inside sellers $11M $87M 2014 2019 Inside sales/digital revenue A L I G N I N G W I T H T R E N D S F O R G R O W T H T R A N S P O R T A T I O N P A C K A G I N G H E A L T H C A R E C O N S U M E R PolyOne Corporation 13 Facilitate alternative energy solutions Light- weighting Reduce packaging materials Improve recyclability Reduce spread of infection R E V E N U E F R O M S U S T A I N A B L E S O L U T I O N S PolyOne Corporation 14 2016 2017 2018 2019 Lightweighting Reduced Material Requirements Improved Recyclability Renewable Energy Applications Eco-conscious Bio-derived Content Reduced Energy Use VOC Reduction $275M $325M $355M $410M 14% Total Annual Growth 9% Organic Annual Growth I N N O V A T I O N PolyOne Corporation 15 Customization 55% M&A 30% Innovation Pipeline 15% Innovation comes from Research & Development Spend ($ millions) Vitality Index % of sales from products launched last 5 years 12% 37% 2006 2019 $20 $51 2006 2019 Transformational Opportunity for Growth Through M&A Adjacent Opportunity for Growth Through New Product Pipeline Core Customization 3 H O R I Z O N S O F D E V E L O P M E N T PolyOne Corporation 16 Incremental development from existing base of technology New development adjacent to current technology New technology development outside of and with our current base Service adjacent markets and customers Create new markets, target new customer needs Service existing markets and customers Market Technical I N N O V A T I O N Non-Halogen Flame Retardants Barrier Technologies Fiber Colorants Advanced Composites Thermoplastic Elastomers Gordon Composites/ Polystrand – Composites GLS – Thermoplastic Elastomers ColorMatrix – Liquid Color & Additives PlastiComp Fiber-Line I N N O V A T I O N S P O T L I G H T : C O M P O S I T E S PolyOne Corporation 17 C O M P O S I T E M A T E R I A L S Glass Carbon Aramid Thermosets Thermoplastics PolymersFibers PolyOne Corporation 18 Focused End Markets • Wire & Cable / Electrical • Consumer • Transportation • Industrial C O M P O S I T E S P O R T F O L I O D I V E R S E C A P A B I L I T I E S A N D S O L U T I O N S S E R V I N G M A N U F A C T U R E R S A N D O E M S PolyOne Corporation 19 LFT Tapes Laminates/Panels Shapes Pultrusion Engineered Fibers P O L Y O N E A P P L I C A T I O N S I N F I B E R O P T I C C A B L E S PolyOne Corporation 20 1.

Such litigation may have an adverse impact on the Combined Company’s business and results of operations or may cause disruptions to the Combined Company’s operations. 16 POLYONE CORPORATION ITEM 1B. Following is a summary of sales and long-lived assets based on the geographic areas where the sales originated and where the assets are located: (In millions) 2012 2011 2010 Net sales: United States $ 1,833.8 $ 1,756.5 $ 1,666.4 Europe 501.3 506.0 467.4 Canada 257.0 259.9 222.9 Asia 221.2 196.3 190.8 Mexico 103.2 91.3 59.1 South America 37.5 42.2 1.6 Other 38.6 11.3 13.7 Long-lived assets: United States $ 262.6 $ 258.2 $ 237.8 Europe 82.2 86.9 88.3 Canada 5.7 5.9 5.5 Asia 45.1 39.3 38.5 South America 8.4 4.6 1.6 Other 3.5 2.7 2.7 Note 16 — COMMON SHARE DATA Weighted-average shares used in computing net income per share is as follows: (In millions) 2012 2011 2010 Weighted-average shares — basic: 89.1 92.2 93.1 Plus dilutive impact of stock options and share-based awards 0.7 2.1 2.9 Weighted-average shares — diluted: 89.8 94.3 96.0 Basic net income per common share is computed as net income available to common shareholders divided by the weighted average basic shares outstanding. The information regarding Section 16(a) beneficial ownership reporting compliance is incorporated by reference to the material under the heading “Section 16(a) Beneficial Ownership Reporting Compliance” in the 2013 Proxy Statement.

Pineville, NC 16. On May 16, 2016, we announced that we would increase our share buyback by 7.3 million to 10.0 million. The information regarding Section 16(a) beneficial ownership reporting compliance is incorporated by reference to the material under the heading “Section 16(a) Beneficial Ownership Reporting Compliance” in the 2018 Proxy Statement.

我们的《行为准则》 发布日期：2024 年 10 月 目录 介绍 : 首席执行官寄语 1 我们的《行为准则》 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 尊重所有人 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 工作诚实 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 我们企业的诚信 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 企业社会责任 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 资源和联系信息 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》 | 16 目录 介绍 我们的《行为准则》 尊重所有人 工作诚实 我们企业的诚信 企业社会责任 资源和联系信息 http://《全球隐私与数据保护政策》 http://《全球隐私与数据保护政策》 社交媒体和社交网络 Avient 认为社交媒体和社交网络可能对专业有价值。 我们将童工定义为 16 岁以下的任何人，如当地法 律比我们的政策更为严格，我们将遵守更为严格的当地法律。