Noord-Amerika Wereldwijd hoofdkantoor Avon Lake, Verenigde Staten 33587 Walker Road Avon Lake, OH, Verenigde Staten 44012 Gratis: +1-866-765-9663 Telefoon: +1-440-930-1000 Fax: +440 930 3064 Azië-Pacific Regionaal hoofdkantoor Shanghai, China 2F, blok C 200 Jinsu Road Pudong, 201206 Shanghai, China Telefoon: +86 (0) 21 6028 4888 Fax: +86 (0) 21 6028 4999 Zuid-Amerika Regionaal hoofdkantoor Sao Paulo, Brazilië Av.

Avient is evolving to its next phase as an innovator of materials solutions to help our customers succeed, while enabling a sustainable world Key messages Our primary focus is on organic revenue growth and margin expansion ► intersect secular trends and high growth markets with our technologies ► catalyze growth in our core build businesses in high growth markets ► hybridization Our strategy is enabled and driven by our focus on (a) portfolio prioritization, (b) amplifying innovation, (c) digital for operational excellence and growth, and (d) leadership, talent and culture for the Avient of the future Copyright © . 2024 7 Avient at a glance

Sustainability Report | 2020 37 P R O D U C T S 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.  Sustainability Report | 2020 72 P E R F O R M A N C E 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 Sustainability Report | 2020 98 Task Force on Climate-related Financial Disclosures (TCFD) Index Recommended Disclosure Avient Disclosures 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 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 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.

Who We Are Personal Values INTEG IT Y R SP ECT H O N E S T Y Core Values COLLABO IO E X C LL ENCE INNOVATION Sustainability Report | 2019 7 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. Sustainability Report | 2019 36 https://www.greatplacetowork.com P R O D U C T S Sustainability Report | 2019 37 Innovation: The Lifeblood of a Specialty Organization Innovation is the lifeblood of any specialty company. Sustainability Report | 2019 76 P E R F O R M A N C E Sustainability Report | 2019 77Sustainability Report | 2019 77 Packaging Consumer Performance Overview The fourth “P” of our sustainability cornerstones is Performance.

Who We Are Personal Values INTEG IT Y R SP ECT H O N E S T Y Core Values COLLABO IO E X C LL ENCE INNOVATION Sustainability Report | 2019 7 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. Sustainability Report | 2019 36 https://www.greatplacetowork.com P R O D U C T S Sustainability Report | 2019 37 Innovation: The Lifeblood of a Specialty Organization Innovation is the lifeblood of any specialty company. Sustainability Report | 2019 76 P E R F O R M A N C E Sustainability Report | 2019 77Sustainability Report | 2019 77 Packaging Consumer Performance Overview The fourth “P” of our sustainability cornerstones is Performance.

Phoenix, Arizona (c) 31. c) There are two manufacturing plants located in Phoenix, Arizona. AVIENT.COM V IE C A U L R 2021

Bắc Mỹ Trụ sở chính Avon Lake, Hoa Kỳ 33587 Walker Road Avon Lake, OH, Hoa Kỳ 44012 Số điện thoại miễn phí: +1 866 765 9663 Điện thoại: +1 440 930 1000 Fax: +1 440 930 3064 Châu Á Thái Bình Dương Trụ sở Khu vực Thượng Hải, Trung Quốc 2F, Block C 200 Đường Jinsu Phố Đông, 201206 Thượng Hải, Trung Quốc Điện thoại: +86 (0) 21 6028 4888 Fax: +86 (0) 21 6028 4999 Nam Mỹ Trụ sở Khu vực Sao Paulo, Brazil Av.

Shanghai, China (c) 56. c) There are two manufacturing plants located in Shanghai, China. About Us—Revenue by Geography and End Market Page 14 HOME | Contents | Message from the CEO | About Us | People | Products | Planet | Performance | Metrics | Index Sustainability Report | 2022 100 Recommended Disclosure Avient Disclosures 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 59 Avient 2023 Proxy Statement Pages 47–49, 51 2022 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 17 People—Management Approach EH&S Page 19 Planet—Climate Change Page 59 2022 CDP Climate Change Response—C1.2, C1.2a Describe the climate-related risks and opportunities the organization has identified over the short, medium, and long term 2022 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 2022 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 2022 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 59 2022 CDP Climate Change Response—C2.2, C2.2a, C2.2b Describe the organization’s processes for managing climate-related risks Planet—Climate Change Page 59 2022 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 2022 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 2022 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—People and Planet Data and Metrics Pages 84–85 2022 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—People and Planet Data and Metrics Pages 84–85 2030 Sustainability Goals Page 7 2022 CDP Climate Change Response—C4 Task Force on Climate-related Financial Disclosures (TCFD) Index HOME | Contents | Message from the CEO | About Us | People | Products | Planet | Performance | Metrics | Index Sustainability Report | 2022 101 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 | Performance | Metrics | Index Sustainability Report | 2023 91 Task Force on Climate-related Financial Disclosures (TCFD) Index Recommended Disclosure Avient Disclosures 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 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 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 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 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 2030 Sustainability Goals Page 7 CDP Climate Change Response—C4 HOME | Contents | Message from the CEO | About Us | People | Products | Planet | Performance | Metrics | Index Sustainability Report | 2023 92 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 | Performance | Metrics | Index Sustainability Report | 2023 91 Task Force on Climate-related Financial Disclosures (TCFD) Index Recommended Disclosure Avient Disclosures 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 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 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 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 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 2030 Sustainability Goals Page 7 CDP Climate Change Response—C4 HOME | Contents | Message from the CEO | About Us | People | Products | Planet | Performance | Metrics | Index Sustainability Report | 2023 92 TCFD Climate Scenario Risks & Opportunities Matrix *For full disclosure of the results as aligned with TCFD guidance, refer to CDP Climate Change Report.