Who We Are Personal Values INTEG R IT Y R E S P EC T H O N E S T Y Core Values COLLAB O R A T IO N E X C E LL EN CE IN N OVAT I O N HOME | Contents | Message from the CEO | Who We Are | People | Products | Planet | Performance | Goals & Metrics | Indices Sustainability Report | 2019 7 https://responsiblecare.americanchemistry.com https://endplasticwaste.org/about/ https://www.avient.com What We Do: Material Science Avient’s vision is to create specialized and sustainable material solutions that transform customer challenges into opportunities, bringing new products to life for a better world. HOME | Contents | Message from the CEO | Who We Are | People | Products | Planet | Performance | Goals & Metrics | Indices Sustainability Report | 2019 36 https://www.greatplacetowork.com P R O D U C T S HOME | Contents | Message from the CEO | Who We Are | People | Products | Planet | Performance | Goals & Metrics | Indices Sustainability Report | 2019 37 Innovation: The Lifeblood of a Specialty Organization Innovation is the lifeblood of any specialty company. HOME | Contents | Message from the CEO | Who We Are | People | Products | Planet | Performance | Goals & Metrics | Indices Sustainability Report | 2019 76 P E R F O R M A N C E HOME | Contents | Message from the CEO | Who We Are | People | Products | Planet | Performance | Goals & Metrics | Indices Sustainability Report | 2019 77Sustainability Report | 2019 77 Packaging Consumer Healthcare Performance Overview The fourth “P” of our sustainability cornerstones is Performance.

Comprehensive overview of Avient technologies for applications within the B&C industry

Shanghai, China (c) 56. c) There are two manufacturing plants located in Shanghai, China. D o ll a r ($ ) M il li o n s 2017 2018 2019 2020 2021 2022 $85 FROM PRODUCTS INTRODUCED IN THE LAST 5 YEARS 33% of specialty sales Revenue from Sustainable Solutions* 2016–2022 Lightweighting Eco-conscious Recycle Solutions VOC Reduction Sustainable Infrastructure Human Health & Safety Reduced Energy Use Biopolymers * Avient Sustainable Solutions definitions aligned with FTC 2012 Guide for the Use of Environmental Marketing Claims (“Green Guides”) (1) 2020 is Pro Forma to include full year of the Clariant Color business (2) 2022 is Pro Forma for the acquisition of APM and the divestiture of Distribution 2016 2017 2018 2019 2020PF(1) 2021 2022PF(2) $790M $550M $405M $455M $340M $915M $1,175M Vitality Index 11% Or gan ic C AG R Investment in Innovation HOME | Contents | Message from the CEO | About Us | People | Products | Planet | Per formance | Metrics | IndexHOME | Contents | Message from the CEO | About Us | People | Sustainability Report | 2022 42 Reducing Carbon Footprint What is carbon footprint?

Ethics Hotline: https://www.Avient.com/company/policies-and-governance/ethics-hotline Telephone Ethics Hotline Number: 1-877-228-5410 https://www.Avient.com/company/policies-and-governance/ethics-hotline North America Global Headquarters Avon Lake, United States 33587 Walker Road Avon Lake, OH, United States 44012 Toll Free: +1 866 765 9663 Phone: +1 440 930 1000 Fax: +440 930 3064 Asia Pacific Regional Headquarters Shanghai, China 2F, Block C 200 Jinsu Road Pudong, 201206 Shanghai, China Telephone: +86 (0) 21 6028 4888 Fax: +86 (0) 21 6028 4999 South America Regional Headquarters Sao Paulo, Brazil Av.

Shanghai, China (c) 54. c) There are two manufacturing plants located in Shanghai, China. HOME | Contents | Message from the CEO | About Us | People | Products | Planet | Per formance | Metrics | Index Sustainability Report | 2023 91 https://www.avient.com/sites/default/files/2022-03/Sustainability%20ESG%20Disclosures_Global%20Chemical%20Mgt%20Policy.pdf https://www.avient.com/sites/default/files/2024-03/AS-FILED%20EF20024640%20Avient%20Corp%20ARS.pdf Task Force on Climate-related Financial Disclosures (TCFD) Index Recommended Disclosure Avient Disclosures Governance Describe the board’s oversight of climate-related risks and opportunities Message from the Governance and Corporate Responsibility Committee Page 4 Planet—Climate Change Page 53 Avient 2023 Proxy Statement Pages 30–31, 34 CDP Climate Change Response—C1.1b Describe management’s role in assessing and managing climate-related risks and opportunities Message from Avient's VP of Sustainability Page 16 People—Environmental, Health & Safety Page 18 Planet—Climate Change Page 53 CDP Climate Change Response—C1.2, C1.2a Strategy Describe the climate-related risks and opportunities the organization has identified over the short, medium, and long term CDP Climate Change Response—C2.1, C2.2C, C2.3a, C2.4a Describe the impact of climate-related risks and opportunities on the organization’s businesses, strategy, and financial planning CDP Climate Change Response—C2.5, C2.6 Describe the resilience of the organization’s strategy, taking into consideration different climate-related scenarios, including a 2°C or lower scenario CDP Climate Change Response—C3.1a, C3.1g Risk Management Describe the organization’s processes for identifying and assessing climate-related risks Planet—Climate Change Page 53 CDP Climate Change Response—C2.2, C2.2a, C2.2b Describe the organization’s processes for managing climate-related risks Planet—Climate Change Page 53 CDP Climate Change Response—C2.2, C2.2d Describe how processes for identifying, assessing and managing climate-related risks are integrated into the organization’s overall risk management Planet—Climate Change Page 53 CDP Climate Change Response—C2.2, C3.1c Metrics & Targets Disclose the metrics used by the organization to assess climate-related risks and opportunities in line with its strategy and risk management process Planet—Climate Change Page 53 CDP Climate Change Response—C6.1, C6.2, C6.3, C6.5 Disclose Scope 1, Scope 2 and, if appropriate, Scope 3 greenhouse gas emissions and the related risks Metrics—Planet Data and Metrics Page 77 Planet—Climate Change Page 53 CDP Climate Change Response—C6.1, C6.2, C6.3, C6.5 Describe the targets used by the organization to manage climate-related risks and opportunities and performance against targets Metrics—Planet Data and Metrics Page 77 2030 Sustainability Goals Page 7 CDP Climate Change Response—C4 HOME | Contents | Message from the CEO | About Us | People | Products | Planet | Per formance | Metrics | Index Sustainability Report | 2023 92 https://www.avient.com/sites/default/files/2024-03/2024%20Proxy%20Statement_March.pdf https://www.avient.com/company/sustainability/sustainability-report/reporting/cdp-climate-change-report https://www.avient.com/company/sustainability/sustainability-report/reporting/cdp-climate-change-report https://www.avient.com/company/sustainability/sustainability-report/reporting/cdp-climate-change-report https://www.avient.com/company/sustainability/sustainability-report/reporting/cdp-climate-change-report https://www.avient.com/company/sustainability/sustainability-report/reporting/cdp-climate-change-report https://www.avient.com/company/sustainability/sustainability-report/reporting/cdp-climate-change-report https://www.avient.com/company/sustainability/sustainability-report/reporting/cdp-climate-change-report https://www.avient.com/company/sustainability/sustainability-report/reporting/cdp-climate-change-report https://www.avient.com/company/sustainability/sustainability-report/reporting/cdp-climate-change-report https://www.avient.com/company/sustainability/sustainability-report/reporting/cdp-climate-change-report https://www.avient.com/company/sustainability/sustainability-report/reporting/cdp-climate-change-report TCFD Climate Scenario Risks & Opportunities Matrix *For full disclosure of the results as aligned with TCFD guidance, refer to CDP Climate Change Report.

Shanghai, China (c) 54. c) There are two manufacturing plants located in Shanghai, China. HOME | Contents | Message from the CEO | About Us | People | Products | Planet | Per formance | Metrics | Index Sustainability Report | 2023 91 https://www.avient.com/sites/default/files/2022-03/Sustainability%20ESG%20Disclosures_Global%20Chemical%20Mgt%20Policy.pdf https://www.avient.com/sites/default/files/2024-03/AS-FILED%20EF20024640%20Avient%20Corp%20ARS.pdf Task Force on Climate-related Financial Disclosures (TCFD) Index Recommended Disclosure Avient Disclosures Governance Describe the board’s oversight of climate-related risks and opportunities Message from the Governance and Corporate Responsibility Committee Page 4 Planet—Climate Change Page 53 Avient 2023 Proxy Statement Pages 30–31, 34 CDP Climate Change Response—C1.1b Describe management’s role in assessing and managing climate-related risks and opportunities Message from Avient's VP of Sustainability Page 16 People—Environmental, Health & Safety Page 18 Planet—Climate Change Page 53 CDP Climate Change Response—C1.2, C1.2a Strategy Describe the climate-related risks and opportunities the organization has identified over the short, medium, and long term CDP Climate Change Response—C2.1, C2.2C, C2.3a, C2.4a Describe the impact of climate-related risks and opportunities on the organization’s businesses, strategy, and financial planning CDP Climate Change Response—C2.5, C2.6 Describe the resilience of the organization’s strategy, taking into consideration different climate-related scenarios, including a 2°C or lower scenario CDP Climate Change Response—C3.1a, C3.1g Risk Management Describe the organization’s processes for identifying and assessing climate-related risks Planet—Climate Change Page 53 CDP Climate Change Response—C2.2, C2.2a, C2.2b Describe the organization’s processes for managing climate-related risks Planet—Climate Change Page 53 CDP Climate Change Response—C2.2, C2.2d Describe how processes for identifying, assessing and managing climate-related risks are integrated into the organization’s overall risk management Planet—Climate Change Page 53 CDP Climate Change Response—C2.2, C3.1c Metrics & Targets Disclose the metrics used by the organization to assess climate-related risks and opportunities in line with its strategy and risk management process Planet—Climate Change Page 53 CDP Climate Change Response—C6.1, C6.2, C6.3, C6.5 Disclose Scope 1, Scope 2 and, if appropriate, Scope 3 greenhouse gas emissions and the related risks Metrics—Planet Data and Metrics Page 77 Planet—Climate Change Page 53 CDP Climate Change Response—C6.1, C6.2, C6.3, C6.5 Describe the targets used by the organization to manage climate-related risks and opportunities and performance against targets Metrics—Planet Data and Metrics Page 77 2030 Sustainability Goals Page 7 CDP Climate Change Response—C4 HOME | Contents | Message from the CEO | About Us | People | Products | Planet | Per formance | Metrics | Index Sustainability Report | 2023 92 https://www.avient.com/sites/default/files/2024-03/2024%20Proxy%20Statement_March.pdf https://www.avient.com/company/sustainability/sustainability-report/reporting/cdp-climate-change-report https://www.avient.com/company/sustainability/sustainability-report/reporting/cdp-climate-change-report https://www.avient.com/company/sustainability/sustainability-report/reporting/cdp-climate-change-report https://www.avient.com/company/sustainability/sustainability-report/reporting/cdp-climate-change-report https://www.avient.com/company/sustainability/sustainability-report/reporting/cdp-climate-change-report https://www.avient.com/company/sustainability/sustainability-report/reporting/cdp-climate-change-report https://www.avient.com/company/sustainability/sustainability-report/reporting/cdp-climate-change-report https://www.avient.com/company/sustainability/sustainability-report/reporting/cdp-climate-change-report https://www.avient.com/company/sustainability/sustainability-report/reporting/cdp-climate-change-report https://www.avient.com/company/sustainability/sustainability-report/reporting/cdp-climate-change-report https://www.avient.com/company/sustainability/sustainability-report/reporting/cdp-climate-change-report TCFD Climate Scenario Risks & Opportunities Matrix *For full disclosure of the results as aligned with TCFD guidance, refer to CDP Climate Change Report.

HOME | Contents | Message from the CEO | Who We Are | People | Products | Planet | Performance | Metrics | Index Sustainability Report | 2020 37 https://www.greatplacetowork.com https://www.newsweek.com/americas-most-responsible-companies-2021 https://www.newsweek.com/americas-most-responsible-companies-2021 https://www.greatplacetowork.com https://www.newsweek.com/americas-most-responsible-companies-2021 P R O D U C T S HOME | Contents | Message from the CEO | Who We Are | People | Products | Planet | Performance | Metrics | Index Sustainability Report | 2020 38 How Our Products Enable Sustainability Avient defines our Sustainability Portfolio in the eight ways in which we help our customers meet their innovation and sustainability goals through material science. HOME | Contents | Message from the CEO | Who We Are | People | Products | Planet | Performance | Metrics | Index Sustainability Report | 2020 72 P E R F O R M A N C E HOME | Contents | Message from the CEO | Who We Are | People | Products | Planet | Performance | Metrics | Index Sustainability Report | 2020 73Sustainability Report | 2020 73 Performance Overview The fourth “P” of our sustainability cornerstones is Performance. Who We Are—Revenue by Geography and End Market Sustainability Accounting Standards Board (SASB) Chemicals Standard Index HOME | Contents | Message from the CEO | Who We Are | People | Products | Planet | Performance | Metrics | Index Sustainability Report | 2020 98 Task Force on Climate-related Financial Disclosures (TCFD) Index Recommended Disclosure Avient Disclosures Governance Describe the board’s oversight of climate-related risks and opportunities Message from the Governance and Corporate Responsibility Committee Planet—Climate Change 2020 CDP Climate Change Response—C1.1b Describe management’s role in assessing and managing climate-related risks and opportunities People—Management Approach EH&S Planet—Protecting Our Planet; Climate Change 2020 CDP Climate Change Response—C1.2, C1.2a Strategy Describe the climate-related risks and opportunities the organization has identified over the short, medium, and long term 2020 CDP Climate Change Response—C2.1, C2.2C, C2.3a, C2.4a Describe the impact of climate-related risks and opportunities on the organization’s businesses, strategy, and financial planning 2020 CDP Climate Change Response—C2.5, C2.6 Describe the resilience of the organization’s strategy, taking into consideration different climate-related scenarios, including a 2°C or lower scenario 2020 CDP Climate Change Response—C3.1a, C3.1g Risk Management Describe the organization’s processes for identifying and assessing climate-related risks Planet—Climate Change 2020 CDP Climate Change Response—C2.2, C2.2a, C2.2b Describe the organization’s processes for managing climate-related risks Planet—Climate Change 2020 Climate Change Response—C2.2, C2.2d Describe how processes for identifying, assessing and managing climate-related risks are integrated into the organization’s overall risk management Planet—Climate Change 2020 CDP Climate Change Response—C2.2, C3.1c Metrics & Targets Disclose the metrics used by the organization to assess climate-related risks and opportunities in line with its strategy and risk management process Planet—Climate Change 2020 CDP Climate Change Response—C6.1, C6.2, C6.3, C6.5 Disclose Scope 1, Scope 2 and, if appropriate, Scope 3 greenhouse gas emissions and the related risks Metrics and Index—People and Planet Data and Metrics Planet—Climate Change 2020 CDP Climate Change Response—C6.1, C6.2, C6.3, C6.5 Describe the targets used by the organization to manage climate-related risks and opportunities and performance against targets Metrics and Index—People and Planet Data and Metrics 2030 Sustainability Goals 2020 CDP Climate Change Response—C4 HOME | Contents | Message from the CEO | Who We Are | People | Products | Planet | Performance | Metrics | Index Sustainability Report | 2020 99 Reconciliation of Non-GAAP Financial Measures Reconciliation of Non-GAAP Financial Measures (Unaudited) (Dollars in millions, except for per share data) 1 Below is a reconciliation of non-GAAP financial measures to their most directly comparable financial measures calculated and presented in accordance with GAAP.

Saluran langsung Etika https://www.Avient.com/company/policies-and-governance/ethics-hotline Nomor Telepon Saluran Langsung Etika: 1-877-228-5410 https://www.Avient.com/company/policies-and-governance/ethics-hotline Amerika Utara Kantor Pusat Global Avon Lake, Amerika Serikat 33587 Walker Road Avon Lake, OH, Amerika Serikat 44012 Nomor Bebas Pulsa: +1 866 765 9663 Nomor Telepon: +1 440 930 1000 Faks: +1 440 930 3064 Asia Pasifik Kantor Pusat Regional Shanghai, Tiongkok 2F, Block C 200 Jinsu Road Pudong, 201206 Shanghai, Tiongkok Telepon: +86 (0) 21 6028 4888 Faks: +86 (0) 21 6028 4999 Amerika Selatan Kantor Pusat Regional Sao Paulo, Brasil Av.

+1-866-765-9663 Телефон: +1-440-930-1000 Факс: +1-440 930 3064 Азиатско-Тихоокеанский регион Региональный офис в Шанхае, Китай 2F, Block C 200 Jinsu Road Pudong, 201206 Shanghai, China Телефон: +86 (0) 21 6028 4888 Факс: +86 (0) 21 6028 4999 Южная Америка Региональный офис в Сан-Паулу, Бразилия Av.

Línea directa de ética: https://www.Avient.com/company/policies-and-governance/ethics-hotline Número de teléfono de la línea directa de ética: 1-877-228-5410 https://www.Avient.com/company/policies-and-governance/ethics-hotline Norteamérica Sede central global de Avon Lake, Estados Unidos 33587 Walker Road Avon Lake, OH, Estados Unidos 44012 Número gratuito: +1 866 765 9663 Teléfono: +1 440 930 1000 Fax: +1 440 930 3064 Asia Pacífico Sede central regional de Shanghái, China 2F, Block C 200 Jinsu Road Pudong, 201206 Shanghái, China Teléfono: +86 (0) 21 6028 4888 Fax: +86 (0) 21 6028 4999 Sudamérica Sede central regional de San Pablo, Brasil Av.