2021 CDP Climate Change Response—C6.1, C6.2, C6.3, C6.5 Planet—Climate Change Page 59 2022 CDP Climate Change Response—C6.1, C6.2, C6.3, C6.5

Row 1 Scope 2, location-based We are reporting a Scope 2, location-based figure Scope 2, market-based We are reporting a Scope 2, market-based figure Comment C6.3 (C6.3) What were your organization’s gross global Scope 2 emissions in metric tons CO2e? Total gross generation (MWh) inside chemicals sector boundary Generation that is consumed (MWh) inside chemicals sector boundary Electricity 2,904 2,904 Heat 0 0 Steam 0 0 Cooling 0 0 C8.2e (C8.2e) Provide details on the electricity, heat, steam, and/or cooling amounts that were accounted for at a zero emission factor in the market-based Scope 2 figure reported in C6.3. Verification/assurance status Avient CDP Climate Change Questionnaire 2021 Tuesday, August 3, 2021 77 Scope 1 No third-party verification or assurance Scope 2 (location-based or market-based) No third-party verification or assurance Scope 3 No third-party verification or assurance C10.2 (C10.2) Do you verify any climate-related information reported in your CDP disclosure other than the emissions figures reported in C6.1, C6.3, and C6.5?

Row 1 Scope 2, location-based We are reporting a Scope 2, location-based figure Scope 2, market-based We are reporting a Scope 2, market-based figure Comment C6.3 (C6.3) What were your organization’s gross global Scope 2 emissions in metric tons CO2e? Scope 3 category Scope 3: Fuel and energy-related activities (not included in Scopes 1 or 2) Verification or assurance cycle in place Annual process Avient CDP Climate Change Questionnaire 2022 Friday, July 29, 2022 107 Status in the current reporting year Complete Type of verification or assurance Limited assurance Attach the statement AvientRY 2021 CDP Verification Opinion Declaration_07-26-22r.pdf Page/section reference 1 - GHG Emissions Statement Relevant standard ISO14064-3 Proportion of reported emissions verified (%) 17.5 C10.2 (C10.2) Do you verify any climate-related information reported in your CDP disclosure other than the emissions figures reported in C6.1, C6.3, and C6.5?

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.

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 | Goals & Metrics | Indices Sustainability Report | 2019 107 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—Energy, Greenhouse Gas (GHG) Emissions and Climate Change 2019 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 2019 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 2019 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 2019 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 2019 CDP Climate Change Response—C3.1a, C3.1g Risk Management Describe the organization’s processes for identifying and assessing climate-related risks Planet—Energy, Greenhouse Gas (GHG) Emissions and Climate Change 2019 CDP Climate Change Response—C2.2, C2.2a, C2.2b Describe the organization’s processes for managing climate-related risks Planet—Energy, Greenhouse Gas (GHG) Emissions and Climate Change 2019 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—Energy, Greenhouse Gas (GHG) Emissions and Climate Change 2019 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—Energy, Greenhouse Gas (GHG) Emissions and Climate Change 2019 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 Planet—Energy, Greenhouse Gas (GHG) Emissions and Climate Change 2019 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 Planet—Energy, Greenhouse Gas (GHG) Emissions and Climate Change Goals & Metrics—Sustainability Goals 2019 CDP Climate Change Response—C4 HOME | Contents | Message from the CEO | Who We Are | People | Products | Planet | Performance | Goals & Metrics | Indices Sustainability Report | 2019 108 We define EBITDA as earnings before interest (net of interest income), taxes, depreciation and amortization.

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 | Goals & Metrics | Indices Sustainability Report | 2019 107 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—Energy, Greenhouse Gas (GHG) Emissions and Climate Change 2019 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 2019 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 2019 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 2019 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 2019 CDP Climate Change Response—C3.1a, C3.1g Risk Management Describe the organization’s processes for identifying and assessing climate-related risks Planet—Energy, Greenhouse Gas (GHG) Emissions and Climate Change 2019 CDP Climate Change Response—C2.2, C2.2a, C2.2b Describe the organization’s processes for managing climate-related risks Planet—Energy, Greenhouse Gas (GHG) Emissions and Climate Change 2019 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—Energy, Greenhouse Gas (GHG) Emissions and Climate Change 2019 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—Energy, Greenhouse Gas (GHG) Emissions and Climate Change 2019 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 Planet—Energy, Greenhouse Gas (GHG) Emissions and Climate Change 2019 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 Planet—Energy, Greenhouse Gas (GHG) Emissions and Climate Change Goals & Metrics—Sustainability Goals 2019 CDP Climate Change Response—C4 HOME | Contents | Message from the CEO | Who We Are | People | Products | Planet | Performance | Goals & Metrics | Indices Sustainability Report | 2019 108 We define EBITDA as earnings before interest (net of interest income), taxes, depreciation and amortization.

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.