HOME | Contents | Message from the CEO | About Us | People | Products | Planet | Per formance | Metrics | Index Sustainability Report | 2023 82 https://www.avient.com/sites/default/files/2024-03/2024%20Proxy%20Statement_March.pdf https://www.avient.com/investors/governance https://www.avient.com/sites/default/files/2024-03/2024%20Proxy%20Statement_March.pdf https://www.avient.com/company/policies-and-governance/code-conduct https://www.avient.com/investors/governance https://www.avient.com/sites/default/files/2024-03/AS-FILED%20EF20024640%20Avient%20Corp%20ARS.pdf https://www.avient.com/sites/default/files/2024-03/2024%20Proxy%20Statement_March.pdf https://www.avient.com/sites/default/files/2024-03/2024%20Proxy%20Statement_March.pdf https://www.avient.com/sites/default/files/2024-03/2024%20Proxy%20Statement_March.pdf https://www.avient.com/sites/default/files/2024-03/2024%20Proxy%20Statement_March.pdf https://www.avient.com/sites/default/files/2024-03/AS-FILED%20EF20024640%20Avient%20Corp%20ARS.pdf GRI Standard Disclosure Title Avient Disclosures General Disclosures Reporting Practice 102–52 Reporting cycle At minimum, biennial 102–53 Contact point for questions regarding the report https://www.avient.com/contact-us-now 102–54 Claims of reporting in accordance with the GRI standards This report has been prepared in accordance with the GRI Standards: Core Option Economic Topic Disclosures GRI 201: Economic 103-1, 2 and 3 Management approach—GRI 103 Performance—Performance Overview Page 66 201–1 Direct economic value generated and distributed Avient 2023 Annual Report—Form 10-K Pages 19–20 201–2 Financial implications and other risks and opportunities due to climate change Avient 2023 Annual Report—Form 10-K Page 9–10 Performance—Enterprise Risk Management Page 70 Planet—Climate Change, Energy and Greenhouse Gas (GHG) Emissions Page 53 201-3 Defined benefit plan obligations and other retirement plans Avient 2023 Annual Report—Form 10-K Pages 25 & 42 GRI 205: Anti-Corruption 103-1, 2 and 3 Management approach—GRI 103 Performance—The Highest Ethical Standards Page 68 Avient Code of Conduct 205–1 Operations assessed for risks related to corruption Products—Supplier Collaboration Page 48 Performance—The Highest Ethical Standards; Enterprise Risk Management Pages 68, 70 Avient Code of Conduct https://www.avient.com/investors/governance 205–2 Communication and training about anti-corruption policies and procedures Performance—The Highest Ethical Standards Page 68 Avient Code of Conduct https://www.avient.com/investors/governance 205–3 Confirmed incidents of corruption and actions taken There were no incidents of corruption in 2023. Environmental Topic Disclosures GRI 301: Materials 301–1 Materials used by weight or volume About Avient—What We Do: Materials Science Page 12 Avient 2023 Annual Report—Form 10-K Page 3 301–2 Recycled input materials used Products—How Our Products Enable Sustainability Page 40 301–3 Reclaimed products and their packaging materials Products—How Our Products Enable Sustainability Page 40 HOME | Contents | Message from the CEO | About Us | People | Products | Planet | Per formance | Metrics | Index Sustainability Report | 2023 83 https://www.avient.com/contact-us-now https://www.avient.com/sites/default/files/2024-03/AS-FILED%20EF20024640%20Avient%20Corp%20ARS.pdf https://www.avient.com/sites/default/files/2024-03/AS-FILED%20EF20024640%20Avient%20Corp%20ARS.pdf https://www.avient.com/sites/default/files/2024-03/AS-FILED%20EF20024640%20Avient%20Corp%20ARS.pdf https://www.avient.com/company/policies-and-governance/code-conduct https://www.avient.com/company/policies-and-governance/code-conduct https://www.avient.com/investors/governance https://www.avient.com/company/policies-and-governance/code-conduct https://www.avient.com/investors/governance https://www.avient.com/company/policies-and-governance/code-conduct https://www.avient.com/investors/governance https://www.avient.com/company/policies-and-governance/code-conduct https://www.avient.com/sites/default/files/2024-03/AS-FILED%20EF20024640%20Avient%20Corp%20ARS.pdf GRI Standard Disclosure Title Avient Disclosures Environmental Topic Disclosures GRI 302: Energy 103–1, 2 and 3 Management approach—GRI 103 Planet—Protecting Our Planet; Climate Change Pages 52–53 https://www.avient.com/company/sustainability/planet/environmental-stewardship 302–1 Energy consumption within the organization Planet—Protecting Our Planet; Climate Change Pages 52–53 Metrics—Planet Data and Metrics Page 76 302–2 Energy consumption outside of the organization Planet—Protecting Our Planet; Climate Change Pages 52–53 Metrics—Planet Data and Metrics Page 76 302–3 Energy intensity Metrics—Planet Data and Metrics Page 76 Our energy intensity evaluates all energy usage within the organization. 302–4 Reduction of energy consumption Planet—Protecting Our Planet; Climate Change Pages 52–53 Metrics—Planet Data and Metrics Page 76 302–5 Reductions in energy requirements of products and ser vices Products—How Our Products Enable Sustainability Page 40 Metrics—Planet Data and Metrics Page 76 GRI 303: Water and Effluents 303–1 Interactions with water as a shared resource Planet—Water Stewardship Pages 60 https://www.avient.com/company/sustainability/planet/environmental-stewardship 303–3 Water withdrawal Planet—Water Stewardship Pages 60 Metrics—Planet Data and Metrics Page 78 GRI 305: Emissions 103–1, 2 and 3 Management approach—GRI 103 Planet—Protecting Our Planet; Climate Change Pages 52, 53-54 Metrics—Planet Data and Metrics Page 77 305–1 Direct (Scope 1) GHG emissions Planet—Protecting Our Planet; Climate Change Pages 52, 53-54 Metrics—Planet Data and Metrics Page 77 305–2 Energy indirect (Scope 2) GHG emissions Planet—Protecting Our Planet; Climate Change Pages 52, 53-54 Metrics—Planet Data and Metrics Page 77 305–3 Other indirect (Scope 3) GHG emissions Planet—Protecting Our Planet; Climate Change Pages 52, 53-54 Metrics—Planet Data and Metrics Page 77 305–4 GHG emissions intensity Planet—Protecting Our Planet; Climate Change Pages 52, 53-54 Metrics—Planet Data and Metrics Page 77 305–5 Reduction of GHG emissions Planet—Protecting Our Planet; Climate Change Pages 52, 53-54 Metrics—Planet Data and Metrics Page 77 305–7 Nitrogen oxides (NOX), sulfur oxides (SOX), and other significant air emissions Planet—Conventional Air Emissions Page 61 Metrics—Planet Data and Metrics Page 77 HOME | Contents | Message from the CEO | About Us | People | Products | Planet | Per formance | Metrics | Index Sustainability Report | 2023 84 https://www.avient.com/company/sustainability/planet/environmental-stewardship https://www.avient.com/company/sustainability/planet/environmental-stewardship GRI Standard Disclosure Title Avient Disclosures Environmental Topic Disclosures GRI 306: Waste 103–1, 2 and 3 Management approach—GRI 103 Planet—Waste: All Sections Pages 57-58 https://www.avient.com/company/sustainability/planet/environmental-stewardship 306–1 Waste generation and significant waste-related impacts Planet—Waste: All Sections Pages 57-58 306–2 Management of significant waste-related impacts Planet—Waste: All Sections Pages 57-58 306–3 Waste generated Planet—Waste: All Sections Pages 57-58 Metrics—Planet Data and Metrics Page 77 306–4 Waste diverted from disposal Planet—Waste: All Sections Pages 57-58 Metrics—Planet Data and Metrics Page 77 306–5 Waste directed to disposal Planet—Waste: All Sections Pages 57-58 Metrics—Planet Data and Metrics Page 77 GRI 307: Environmental Compliance 103–1, 2 and 3 Management approach—GRI 103 People—Environmental, Health & Safety Page 18 Products—Product Stewardship Page 45 Planet—Protecting Our Planet Page 52 Avient 2023 Annual Report—Form 10-K Pages 6–7 https://www.avient.com/company/sustainability/planet/environmental-stewardship 307–1 Non-compliance with environmental laws and regulations Products—Product Stewardship Page 45 Avient 2023 Annual Report—Form 10-K Pages 6–7 GRI 308: Supplier Environmental Assessment 103–1, 2 and 3 Management approach—GRI 103 Products—Product Stewardship Page 45 Avient Supplier Code of Conduct 308–1 New suppliers that were screened using environmental criteria Products—Product Stewardship Page 45 308–2 Negative environmental impacts in the supply chain and actions taken Products—Product Stewardship Page 45 Social Topic Disclosures GRI 401: Employment 103–1, 2 and 3 Management approach—GRI 103 People—Training and Development; Diversity & Inclusion Pages 23, 24 401–1 New employee hires and employee turnover People—Workforce Demographics Page 28 We hired 988 new associates in 2023 401–2 Benefits provided to full-time employees that are not provided to temporar y or part-time employees People—Associate Benefits / Awards and Recognition Program; Health and Wellness Pages 27, 30 401–3 Parental leave People—Health and Wellness Page 30 HOME | Contents | Message from the CEO | About Us | People | Products | Planet | Per formance | Metrics | Index Sustainability Report | 2023 85 https://www.avient.com/company/sustainability/planet/environmental-stewardship https://www.avient.com/sites/default/files/2024-03/AS-FILED%20EF20024640%20Avient%20Corp%20ARS.pdf https://www.avient.com/company/sustainability/planet/environmental-stewardship https://www.avient.com/sites/default/files/2024-03/AS-FILED%20EF20024640%20Avient%20Corp%20ARS.pdf https://www.avient.com/company/policies-and-governance-0/supplier-code-conduct GRI Standard Disclosure Title Avient Disclosures Social Topic Disclosures GRI 403: Occupational Health & Safety 103–1, 2 and 3 Management approach—GRI 103 People—Environmental, Health & Safety Page 18 Avient 2023 Annual Report—Form 10-K Pages 5–7 Avient’s Human Rights Policy https://www.avient.com/company/sustainability/planet/environmental-stewardship 403–1 Occupational health and safety management system People—Environmental, Health & Safety Page 18 Avient 2023 Annual Report—Form 10-K Pages 5–7 People—Occupational Safety & Health Page 20 https://www.avient.com/company/sustainability/planet/environmental-stewardship 403–2 Hazard identification, risk assessment, and incident investigation People—Environmental, Health & Safety Page 18 https://www.avient.com/company/sustainability/planet/environmental-stewardship 403–3 Occupational health ser vices People—Occupational Safety & Health Page 20 403–4 Worker participation, consultation, and communication on occupational health and safety People—Environmental, Health & Safety Page 18 https://www.avient.com/company/sustainability/planet/environmental-stewardship 403–5 Worker training on occupational health and safety People—Environmental, Health & Safety; People—Training and Development Pages 18, 23 403–6 Promotion of worker health People—Occupational Safety & Health; Health and Wellness Pages 20, 30 403–7 Prevention and mitigation of occupational health and safety impacts directly linked by business relationships People—Environmental, Health & Safety Page 18 Products—Product Stewardship; Products—Supplier Collaboration Pages 45, 48 Avient 2023 Annual Report—Form 10-K Pages 5–7 https://www.avient.com/company/sustainability/planet/environmental-stewardship 403–8 Workers covered by an occupational health and safety management system People—Environmental, Health & Safety Page 18 Avient 2023 Annual Report—Form 10-K Pages 5–7 403–9 Work-related injuries People—Environmental, Health & Safety Page 18 Avient 2023 Annual Report—Form 10-K Pages 5–7 Metrics—Planet Data and Metrics Page 76 403–10 Work-related ill health People—Environmental, Health & Safety Page 18 Avient 2023 Annual Report—Form 10-K Pages 5–7 Metrics—Planet Data and Metrics Page 76 GRI 404: Training & Education 10–1, 2 and 3 Management approach—GRI 103 People—Training and Development Page 23 404–1 Average hours of training per year per employee People—Training and Development; Career Training and Performance Feedback Pages 23, 31 In 2023, associates received 197,471 hours of training through a variety of deliver y methods.

HOME | Contents | Message from the CEO | About Us | People | Products | Planet | Per formance | Metrics | Index Sustainability Report | 2023 82 https://www.avient.com/sites/default/files/2024-03/2024%20Proxy%20Statement_March.pdf https://www.avient.com/investors/governance https://www.avient.com/sites/default/files/2024-03/2024%20Proxy%20Statement_March.pdf https://www.avient.com/company/policies-and-governance/code-conduct https://www.avient.com/investors/governance https://www.avient.com/sites/default/files/2024-03/AS-FILED%20EF20024640%20Avient%20Corp%20ARS.pdf https://www.avient.com/sites/default/files/2024-03/2024%20Proxy%20Statement_March.pdf https://www.avient.com/sites/default/files/2024-03/2024%20Proxy%20Statement_March.pdf https://www.avient.com/sites/default/files/2024-03/2024%20Proxy%20Statement_March.pdf https://www.avient.com/sites/default/files/2024-03/2024%20Proxy%20Statement_March.pdf https://www.avient.com/sites/default/files/2024-03/AS-FILED%20EF20024640%20Avient%20Corp%20ARS.pdf GRI Standard Disclosure Title Avient Disclosures General Disclosures Reporting Practice 102–52 Reporting cycle At minimum, biennial 102–53 Contact point for questions regarding the report https://www.avient.com/contact-us-now 102–54 Claims of reporting in accordance with the GRI standards This report has been prepared in accordance with the GRI Standards: Core Option Economic Topic Disclosures GRI 201: Economic 103-1, 2 and 3 Management approach—GRI 103 Performance—Performance Overview Page 66 201–1 Direct economic value generated and distributed Avient 2023 Annual Report—Form 10-K Pages 19–20 201–2 Financial implications and other risks and opportunities due to climate change Avient 2023 Annual Report—Form 10-K Page 9–10 Performance—Enterprise Risk Management Page 70 Planet—Climate Change, Energy and Greenhouse Gas (GHG) Emissions Page 53 201-3 Defined benefit plan obligations and other retirement plans Avient 2023 Annual Report—Form 10-K Pages 25 & 42 GRI 205: Anti-Corruption 103-1, 2 and 3 Management approach—GRI 103 Performance—The Highest Ethical Standards Page 68 Avient Code of Conduct 205–1 Operations assessed for risks related to corruption Products—Supplier Collaboration Page 48 Performance—The Highest Ethical Standards; Enterprise Risk Management Pages 68, 70 Avient Code of Conduct https://www.avient.com/investors/governance 205–2 Communication and training about anti-corruption policies and procedures Performance—The Highest Ethical Standards Page 68 Avient Code of Conduct https://www.avient.com/investors/governance 205–3 Confirmed incidents of corruption and actions taken There were no incidents of corruption in 2023. Environmental Topic Disclosures GRI 301: Materials 301–1 Materials used by weight or volume About Avient—What We Do: Materials Science Page 12 Avient 2023 Annual Report—Form 10-K Page 3 301–2 Recycled input materials used Products—How Our Products Enable Sustainability Page 40 301–3 Reclaimed products and their packaging materials Products—How Our Products Enable Sustainability Page 40 HOME | Contents | Message from the CEO | About Us | People | Products | Planet | Per formance | Metrics | Index Sustainability Report | 2023 83 https://www.avient.com/contact-us-now https://www.avient.com/sites/default/files/2024-03/AS-FILED%20EF20024640%20Avient%20Corp%20ARS.pdf https://www.avient.com/sites/default/files/2024-03/AS-FILED%20EF20024640%20Avient%20Corp%20ARS.pdf https://www.avient.com/sites/default/files/2024-03/AS-FILED%20EF20024640%20Avient%20Corp%20ARS.pdf https://www.avient.com/company/policies-and-governance/code-conduct https://www.avient.com/company/policies-and-governance/code-conduct https://www.avient.com/investors/governance https://www.avient.com/company/policies-and-governance/code-conduct https://www.avient.com/investors/governance https://www.avient.com/company/policies-and-governance/code-conduct https://www.avient.com/investors/governance https://www.avient.com/company/policies-and-governance/code-conduct https://www.avient.com/sites/default/files/2024-03/AS-FILED%20EF20024640%20Avient%20Corp%20ARS.pdf GRI Standard Disclosure Title Avient Disclosures Environmental Topic Disclosures GRI 302: Energy 103–1, 2 and 3 Management approach—GRI 103 Planet—Protecting Our Planet; Climate Change Pages 52–53 https://www.avient.com/company/sustainability/planet/environmental-stewardship 302–1 Energy consumption within the organization Planet—Protecting Our Planet; Climate Change Pages 52–53 Metrics—Planet Data and Metrics Page 76 302–2 Energy consumption outside of the organization Planet—Protecting Our Planet; Climate Change Pages 52–53 Metrics—Planet Data and Metrics Page 76 302–3 Energy intensity Metrics—Planet Data and Metrics Page 76 Our energy intensity evaluates all energy usage within the organization. 302–4 Reduction of energy consumption Planet—Protecting Our Planet; Climate Change Pages 52–53 Metrics—Planet Data and Metrics Page 76 302–5 Reductions in energy requirements of products and ser vices Products—How Our Products Enable Sustainability Page 40 Metrics—Planet Data and Metrics Page 76 GRI 303: Water and Effluents 303–1 Interactions with water as a shared resource Planet—Water Stewardship Pages 60 https://www.avient.com/company/sustainability/planet/environmental-stewardship 303–3 Water withdrawal Planet—Water Stewardship Pages 60 Metrics—Planet Data and Metrics Page 78 GRI 305: Emissions 103–1, 2 and 3 Management approach—GRI 103 Planet—Protecting Our Planet; Climate Change Pages 52, 53-54 Metrics—Planet Data and Metrics Page 77 305–1 Direct (Scope 1) GHG emissions Planet—Protecting Our Planet; Climate Change Pages 52, 53-54 Metrics—Planet Data and Metrics Page 77 305–2 Energy indirect (Scope 2) GHG emissions Planet—Protecting Our Planet; Climate Change Pages 52, 53-54 Metrics—Planet Data and Metrics Page 77 305–3 Other indirect (Scope 3) GHG emissions Planet—Protecting Our Planet; Climate Change Pages 52, 53-54 Metrics—Planet Data and Metrics Page 77 305–4 GHG emissions intensity Planet—Protecting Our Planet; Climate Change Pages 52, 53-54 Metrics—Planet Data and Metrics Page 77 305–5 Reduction of GHG emissions Planet—Protecting Our Planet; Climate Change Pages 52, 53-54 Metrics—Planet Data and Metrics Page 77 305–7 Nitrogen oxides (NOX), sulfur oxides (SOX), and other significant air emissions Planet—Conventional Air Emissions Page 61 Metrics—Planet Data and Metrics Page 77 HOME | Contents | Message from the CEO | About Us | People | Products | Planet | Per formance | Metrics | Index Sustainability Report | 2023 84 https://www.avient.com/company/sustainability/planet/environmental-stewardship https://www.avient.com/company/sustainability/planet/environmental-stewardship GRI Standard Disclosure Title Avient Disclosures Environmental Topic Disclosures GRI 306: Waste 103–1, 2 and 3 Management approach—GRI 103 Planet—Waste: All Sections Pages 57-58 https://www.avient.com/company/sustainability/planet/environmental-stewardship 306–1 Waste generation and significant waste-related impacts Planet—Waste: All Sections Pages 57-58 306–2 Management of significant waste-related impacts Planet—Waste: All Sections Pages 57-58 306–3 Waste generated Planet—Waste: All Sections Pages 57-58 Metrics—Planet Data and Metrics Page 77 306–4 Waste diverted from disposal Planet—Waste: All Sections Pages 57-58 Metrics—Planet Data and Metrics Page 77 306–5 Waste directed to disposal Planet—Waste: All Sections Pages 57-58 Metrics—Planet Data and Metrics Page 77 GRI 307: Environmental Compliance 103–1, 2 and 3 Management approach—GRI 103 People—Environmental, Health & Safety Page 18 Products—Product Stewardship Page 45 Planet—Protecting Our Planet Page 52 Avient 2023 Annual Report—Form 10-K Pages 6–7 https://www.avient.com/company/sustainability/planet/environmental-stewardship 307–1 Non-compliance with environmental laws and regulations Products—Product Stewardship Page 45 Avient 2023 Annual Report—Form 10-K Pages 6–7 GRI 308: Supplier Environmental Assessment 103–1, 2 and 3 Management approach—GRI 103 Products—Product Stewardship Page 45 Avient Supplier Code of Conduct 308–1 New suppliers that were screened using environmental criteria Products—Product Stewardship Page 45 308–2 Negative environmental impacts in the supply chain and actions taken Products—Product Stewardship Page 45 Social Topic Disclosures GRI 401: Employment 103–1, 2 and 3 Management approach—GRI 103 People—Training and Development; Diversity & Inclusion Pages 23, 24 401–1 New employee hires and employee turnover People—Workforce Demographics Page 28 We hired 988 new associates in 2023 401–2 Benefits provided to full-time employees that are not provided to temporar y or part-time employees People—Associate Benefits / Awards and Recognition Program; Health and Wellness Pages 27, 30 401–3 Parental leave People—Health and Wellness Page 30 HOME | Contents | Message from the CEO | About Us | People | Products | Planet | Per formance | Metrics | Index Sustainability Report | 2023 85 https://www.avient.com/company/sustainability/planet/environmental-stewardship https://www.avient.com/sites/default/files/2024-03/AS-FILED%20EF20024640%20Avient%20Corp%20ARS.pdf https://www.avient.com/company/sustainability/planet/environmental-stewardship https://www.avient.com/sites/default/files/2024-03/AS-FILED%20EF20024640%20Avient%20Corp%20ARS.pdf https://www.avient.com/company/policies-and-governance-0/supplier-code-conduct GRI Standard Disclosure Title Avient Disclosures Social Topic Disclosures GRI 403: Occupational Health & Safety 103–1, 2 and 3 Management approach—GRI 103 People—Environmental, Health & Safety Page 18 Avient 2023 Annual Report—Form 10-K Pages 5–7 Avient’s Human Rights Policy https://www.avient.com/company/sustainability/planet/environmental-stewardship 403–1 Occupational health and safety management system People—Environmental, Health & Safety Page 18 Avient 2023 Annual Report—Form 10-K Pages 5–7 People—Occupational Safety & Health Page 20 https://www.avient.com/company/sustainability/planet/environmental-stewardship 403–2 Hazard identification, risk assessment, and incident investigation People—Environmental, Health & Safety Page 18 https://www.avient.com/company/sustainability/planet/environmental-stewardship 403–3 Occupational health ser vices People—Occupational Safety & Health Page 20 403–4 Worker participation, consultation, and communication on occupational health and safety People—Environmental, Health & Safety Page 18 https://www.avient.com/company/sustainability/planet/environmental-stewardship 403–5 Worker training on occupational health and safety People—Environmental, Health & Safety; People—Training and Development Pages 18, 23 403–6 Promotion of worker health People—Occupational Safety & Health; Health and Wellness Pages 20, 30 403–7 Prevention and mitigation of occupational health and safety impacts directly linked by business relationships People—Environmental, Health & Safety Page 18 Products—Product Stewardship; Products—Supplier Collaboration Pages 45, 48 Avient 2023 Annual Report—Form 10-K Pages 5–7 https://www.avient.com/company/sustainability/planet/environmental-stewardship 403–8 Workers covered by an occupational health and safety management system People—Environmental, Health & Safety Page 18 Avient 2023 Annual Report—Form 10-K Pages 5–7 403–9 Work-related injuries People—Environmental, Health & Safety Page 18 Avient 2023 Annual Report—Form 10-K Pages 5–7 Metrics—Planet Data and Metrics Page 76 403–10 Work-related ill health People—Environmental, Health & Safety Page 18 Avient 2023 Annual Report—Form 10-K Pages 5–7 Metrics—Planet Data and Metrics Page 76 GRI 404: Training & Education 10–1, 2 and 3 Management approach—GRI 103 People—Training and Development Page 23 404–1 Average hours of training per year per employee People—Training and Development; Career Training and Performance Feedback Pages 23, 31 In 2023, associates received 197,471 hours of training through a variety of deliver y methods.

Among other responsibilities, the Non-Executive Chairman of the Board: ◦ Chairs executive sessions of the non-employee Directors and provides feedback and perspective to the CEO regarding discussions at these sessions; ◦ Reviews information as appropriate prior to it being sent to the Board; ◦ Approves meeting agendas for the Board; ◦ Approves meeting schedules to assure that there is sufficient time for discussion of all agenda items; ◦ Serves as a liaison and facilitates communications between the CEO and other members of the Board; ◦ Advises the CEO as to the quality, quantity and timeliness of the flow of information from management to the Board and regarding the effectiveness of Board meetings; ◦ Interviews all Board candidates and provides the Governance and Corporate Responsibility Committee with recommendations on each candidate; ◦ Maintains close contact with the Chair of each standing committee and assists in ensuring communications between each committee and the Board; ◦ Considers the retention of advisers and consultants who report directly to the Board; ◦ Chairs Board meetings; ◦ Has the authority to call meetings of the independent Directors; ◦ If requested by major shareholders, ensures that he or she is available for consultation and direct communication; and ◦ Performs various other duties as may from time to time be determined by the Board. The Consultant regularly attends Compensation Committee meetings, maintains regular contact with the CORPORATE GOVERNANCE PROXY STATEMENT 2025 | Annual Meeting of Shareholders 34 Compensation Committee, and interacts with management to gather the data needed to prepare reports for Compensation Committee review. If you hold your shares through a bank, broker or other nominee, you must follow the instructions found on your voting instruction card, or contact your bank, broker or other nominee in order to revoke your previously delivered proxy, or participate in the Annual Meeting and vote electronically online during the Annual Meeting.

HOME | Contents | Message from the CEO | About Us | People | Products | Planet | Per formance | Metrics | Index Sustainability Report | 2023 82 https://www.avient.com/sites/default/files/2024-03/2024%20Proxy%20Statement_March.pdf https://www.avient.com/investors/governance https://www.avient.com/sites/default/files/2024-03/2024%20Proxy%20Statement_March.pdf https://www.avient.com/company/policies-and-governance/code-conduct https://www.avient.com/investors/governance https://www.avient.com/sites/default/files/2024-03/AS-FILED%20EF20024640%20Avient%20Corp%20ARS.pdf https://www.avient.com/sites/default/files/2024-03/2024%20Proxy%20Statement_March.pdf https://www.avient.com/sites/default/files/2024-03/2024%20Proxy%20Statement_March.pdf https://www.avient.com/sites/default/files/2024-03/2024%20Proxy%20Statement_March.pdf https://www.avient.com/sites/default/files/2024-03/2024%20Proxy%20Statement_March.pdf https://www.avient.com/sites/default/files/2024-03/AS-FILED%20EF20024640%20Avient%20Corp%20ARS.pdf GRI Standard Disclosure Title Avient Disclosures General Disclosures Reporting Practice 102–52 Reporting cycle At minimum, biennial 102–53 Contact point for questions regarding the report https://www.avient.com/contact-us-now 102–54 Claims of reporting in accordance with the GRI standards This report has been prepared in accordance with the GRI Standards: Core Option Economic Topic Disclosures GRI 201: Economic 103-1, 2 and 3 Management approach—GRI 103 Performance—Performance Overview Page 66 201–1 Direct economic value generated and distributed Avient 2023 Annual Report—Form 10-K Pages 19–20 201–2 Financial implications and other risks and opportunities due to climate change Avient 2023 Annual Report—Form 10-K Page 9–10 Performance—Enterprise Risk Management Page 70 Planet—Climate Change, Energy and Greenhouse Gas (GHG) Emissions Page 53 201-3 Defined benefit plan obligations and other retirement plans Avient 2023 Annual Report—Form 10-K Pages 25 & 42 GRI 205: Anti-Corruption 103-1, 2 and 3 Management approach—GRI 103 Performance—The Highest Ethical Standards Page 68 Avient Code of Conduct 205–1 Operations assessed for risks related to corruption Products—Supplier Collaboration Page 48 Performance—The Highest Ethical Standards; Enterprise Risk Management Pages 68, 70 Avient Code of Conduct https://www.avient.com/investors/governance 205–2 Communication and training about anti-corruption policies and procedures Performance—The Highest Ethical Standards Page 68 Avient Code of Conduct https://www.avient.com/investors/governance 205–3 Confirmed incidents of corruption and actions taken There were no incidents of corruption in 2023. Environmental Topic Disclosures GRI 301: Materials 301–1 Materials used by weight or volume About Avient—What We Do: Materials Science Page 12 Avient 2023 Annual Report—Form 10-K Page 3 301–2 Recycled input materials used Products—How Our Products Enable Sustainability Page 40 301–3 Reclaimed products and their packaging materials Products—How Our Products Enable Sustainability Page 40 HOME | Contents | Message from the CEO | About Us | People | Products | Planet | Per formance | Metrics | Index Sustainability Report | 2023 83 https://www.avient.com/contact-us-now https://www.avient.com/sites/default/files/2024-03/AS-FILED%20EF20024640%20Avient%20Corp%20ARS.pdf https://www.avient.com/sites/default/files/2024-03/AS-FILED%20EF20024640%20Avient%20Corp%20ARS.pdf https://www.avient.com/sites/default/files/2024-03/AS-FILED%20EF20024640%20Avient%20Corp%20ARS.pdf https://www.avient.com/company/policies-and-governance/code-conduct https://www.avient.com/company/policies-and-governance/code-conduct https://www.avient.com/investors/governance https://www.avient.com/company/policies-and-governance/code-conduct https://www.avient.com/investors/governance https://www.avient.com/company/policies-and-governance/code-conduct https://www.avient.com/investors/governance https://www.avient.com/company/policies-and-governance/code-conduct https://www.avient.com/sites/default/files/2024-03/AS-FILED%20EF20024640%20Avient%20Corp%20ARS.pdf GRI Standard Disclosure Title Avient Disclosures Environmental Topic Disclosures GRI 302: Energy 103–1, 2 and 3 Management approach—GRI 103 Planet—Protecting Our Planet; Climate Change Pages 52–53 https://www.avient.com/company/sustainability/planet/environmental-stewardship 302–1 Energy consumption within the organization Planet—Protecting Our Planet; Climate Change Pages 52–53 Metrics—Planet Data and Metrics Page 76 302–2 Energy consumption outside of the organization Planet—Protecting Our Planet; Climate Change Pages 52–53 Metrics—Planet Data and Metrics Page 76 302–3 Energy intensity Metrics—Planet Data and Metrics Page 76 Our energy intensity evaluates all energy usage within the organization. 302–4 Reduction of energy consumption Planet—Protecting Our Planet; Climate Change Pages 52–53 Metrics—Planet Data and Metrics Page 76 302–5 Reductions in energy requirements of products and ser vices Products—How Our Products Enable Sustainability Page 40 Metrics—Planet Data and Metrics Page 76 GRI 303: Water and Effluents 303–1 Interactions with water as a shared resource Planet—Water Stewardship Pages 60 https://www.avient.com/company/sustainability/planet/environmental-stewardship 303–3 Water withdrawal Planet—Water Stewardship Pages 60 Metrics—Planet Data and Metrics Page 78 GRI 305: Emissions 103–1, 2 and 3 Management approach—GRI 103 Planet—Protecting Our Planet; Climate Change Pages 52, 53-54 Metrics—Planet Data and Metrics Page 77 305–1 Direct (Scope 1) GHG emissions Planet—Protecting Our Planet; Climate Change Pages 52, 53-54 Metrics—Planet Data and Metrics Page 77 305–2 Energy indirect (Scope 2) GHG emissions Planet—Protecting Our Planet; Climate Change Pages 52, 53-54 Metrics—Planet Data and Metrics Page 77 305–3 Other indirect (Scope 3) GHG emissions Planet—Protecting Our Planet; Climate Change Pages 52, 53-54 Metrics—Planet Data and Metrics Page 77 305–4 GHG emissions intensity Planet—Protecting Our Planet; Climate Change Pages 52, 53-54 Metrics—Planet Data and Metrics Page 77 305–5 Reduction of GHG emissions Planet—Protecting Our Planet; Climate Change Pages 52, 53-54 Metrics—Planet Data and Metrics Page 77 305–7 Nitrogen oxides (NOX), sulfur oxides (SOX), and other significant air emissions Planet—Conventional Air Emissions Page 61 Metrics—Planet Data and Metrics Page 77 HOME | Contents | Message from the CEO | About Us | People | Products | Planet | Per formance | Metrics | Index Sustainability Report | 2023 84 https://www.avient.com/company/sustainability/planet/environmental-stewardship https://www.avient.com/company/sustainability/planet/environmental-stewardship GRI Standard Disclosure Title Avient Disclosures Environmental Topic Disclosures GRI 306: Waste 103–1, 2 and 3 Management approach—GRI 103 Planet—Waste: All Sections Pages 57-58 https://www.avient.com/company/sustainability/planet/environmental-stewardship 306–1 Waste generation and significant waste-related impacts Planet—Waste: All Sections Pages 57-58 306–2 Management of significant waste-related impacts Planet—Waste: All Sections Pages 57-58 306–3 Waste generated Planet—Waste: All Sections Pages 57-58 Metrics—Planet Data and Metrics Page 77 306–4 Waste diverted from disposal Planet—Waste: All Sections Pages 57-58 Metrics—Planet Data and Metrics Page 77 306–5 Waste directed to disposal Planet—Waste: All Sections Pages 57-58 Metrics—Planet Data and Metrics Page 77 GRI 307: Environmental Compliance 103–1, 2 and 3 Management approach—GRI 103 People—Environmental, Health & Safety Page 18 Products—Product Stewardship Page 45 Planet—Protecting Our Planet Page 52 Avient 2023 Annual Report—Form 10-K Pages 6–7 https://www.avient.com/company/sustainability/planet/environmental-stewardship 307–1 Non-compliance with environmental laws and regulations Products—Product Stewardship Page 45 Avient 2023 Annual Report—Form 10-K Pages 6–7 GRI 308: Supplier Environmental Assessment 103–1, 2 and 3 Management approach—GRI 103 Products—Product Stewardship Page 45 Avient Supplier Code of Conduct 308–1 New suppliers that were screened using environmental criteria Products—Product Stewardship Page 45 308–2 Negative environmental impacts in the supply chain and actions taken Products—Product Stewardship Page 45 Social Topic Disclosures GRI 401: Employment 103–1, 2 and 3 Management approach—GRI 103 People—Training and Development; Diversity & Inclusion Pages 23, 24 401–1 New employee hires and employee turnover People—Workforce Demographics Page 28 We hired 988 new associates in 2023 401–2 Benefits provided to full-time employees that are not provided to temporar y or part-time employees People—Associate Benefits / Awards and Recognition Program; Health and Wellness Pages 27, 30 401–3 Parental leave People—Health and Wellness Page 30 HOME | Contents | Message from the CEO | About Us | People | Products | Planet | Per formance | Metrics | Index Sustainability Report | 2023 85 https://www.avient.com/company/sustainability/planet/environmental-stewardship https://www.avient.com/sites/default/files/2024-03/AS-FILED%20EF20024640%20Avient%20Corp%20ARS.pdf https://www.avient.com/company/sustainability/planet/environmental-stewardship https://www.avient.com/sites/default/files/2024-03/AS-FILED%20EF20024640%20Avient%20Corp%20ARS.pdf https://www.avient.com/company/policies-and-governance-0/supplier-code-conduct GRI Standard Disclosure Title Avient Disclosures Social Topic Disclosures GRI 403: Occupational Health & Safety 103–1, 2 and 3 Management approach—GRI 103 People—Environmental, Health & Safety Page 18 Avient 2023 Annual Report—Form 10-K Pages 5–7 Avient’s Human Rights Policy https://www.avient.com/company/sustainability/planet/environmental-stewardship 403–1 Occupational health and safety management system People—Environmental, Health & Safety Page 18 Avient 2023 Annual Report—Form 10-K Pages 5–7 People—Occupational Safety & Health Page 20 https://www.avient.com/company/sustainability/planet/environmental-stewardship 403–2 Hazard identification, risk assessment, and incident investigation People—Environmental, Health & Safety Page 18 https://www.avient.com/company/sustainability/planet/environmental-stewardship 403–3 Occupational health ser vices People—Occupational Safety & Health Page 20 403–4 Worker participation, consultation, and communication on occupational health and safety People—Environmental, Health & Safety Page 18 https://www.avient.com/company/sustainability/planet/environmental-stewardship 403–5 Worker training on occupational health and safety People—Environmental, Health & Safety; People—Training and Development Pages 18, 23 403–6 Promotion of worker health People—Occupational Safety & Health; Health and Wellness Pages 20, 30 403–7 Prevention and mitigation of occupational health and safety impacts directly linked by business relationships People—Environmental, Health & Safety Page 18 Products—Product Stewardship; Products—Supplier Collaboration Pages 45, 48 Avient 2023 Annual Report—Form 10-K Pages 5–7 https://www.avient.com/company/sustainability/planet/environmental-stewardship 403–8 Workers covered by an occupational health and safety management system People—Environmental, Health & Safety Page 18 Avient 2023 Annual Report—Form 10-K Pages 5–7 403–9 Work-related injuries People—Environmental, Health & Safety Page 18 Avient 2023 Annual Report—Form 10-K Pages 5–7 Metrics—Planet Data and Metrics Page 76 403–10 Work-related ill health People—Environmental, Health & Safety Page 18 Avient 2023 Annual Report—Form 10-K Pages 5–7 Metrics—Planet Data and Metrics Page 76 GRI 404: Training & Education 10–1, 2 and 3 Management approach—GRI 103 People—Training and Development Page 23 404–1 Average hours of training per year per employee People—Training and Development; Career Training and Performance Feedback Pages 23, 31 In 2023, associates received 197,471 hours of training through a variety of deliver y methods.

Post-consumer recycled content as percentage of total plastic packaging volume, by weightAvient Corporation 36 37Avient Corporation T O P 5 G A P S T H A T W E A R E A D D R E S S I N G 2: DECONTAMINATION1: COLOR MANAGEMENT 3: MAINTAINING MECHANICAL PROPERTIES 4: MONO-MATERIAL CONSTRUCTION 5: CONSISTENT RECYCLED MATERIAL QUALITY Improving the Use of Recycled Content Avient Corporation 38 39Avient CORPORATION • Inconsistent base color of recycled materials • Lightest color recycled material in high demand for all applications ($$) • Even with clear/transparent materials, color degrades over repeated processing Our Solutions • OpticaTM Toners and Super-concentrated colorants to reduce and mask recycled material discoloration • SmartHeatTM reduces heat history to minimize yellowing • Color Simulation Tool to assist with color space design CHALLENGES OPPORTUNITIES • Stabilization of color fluctuation driven by variable recycled polymer • In-line color correction to optimize customer manufacturing efficiency RECYCLE COLOR QUALITY RANGE Avient Corporation 39 1: Color Management Recycled Material Restricts Color Options With virgin material, we can design across a broad color spectrum The darker the recycled materials, the more color design freedom is restricted This bright yellow is not achievable with high concentrations of dark recycled materials Avient can provide customer guidance on maximum recycle content possible and color concentration required to achieve desired color Avient Corporation 40 Case Study with Brand Owner Recycled Resin = Discolored Base Virgin Resin = Clean Color Base Degree of base discoloration limits recycle content Avient Corporation 41 The Plus Factor Opportunity I N C R E A S E D U S E O F R E C Y C L E D M A T E R I A L R E Q U I R E S M O R E C O L O R A N T A N D A D D I T I V E S Avient Corporation 42 $100M + 2: Decontamination Recycled material feedstocks are contaminated • Feedstock variability supplies the recycle process • Insufficient washing at recycler • Residual labels and printing inks cause quality and NIAS issues • Unpleasant recycled material odor (in processing and the final application) • Clean, food grade, recycled material availability in high demand • Reliable decontamination to reduce NIAS concerns • Full odor removal Our Solutions • CESATM Laser Marking to eliminate contaminating printing inks, labels and glue • AAzureTM process aids and scavengers to enable food and beverage taste purity in PET packaging • ProsureTM range of formulations to enable NIAS compliance and security (customer peace of mind) CHALLENGES NIAS = Non Intentionally Added Substances OPPORTUNITIES Avient Corporation 43 44 3: Maintaining Mechanical Properties • Mechanical properties of recycled materials degrade after multiple heat cycles • Today's recycling protocols only focus on one recycle loop…in reality, there will be several • Legislation and brand owners are targeting higher recycled material ratio incorporation and full circularity • Polymer quality stability over multiple loops to deliver circular recyclability • Stress cracking of recycled bottles • Upgrading performance of lower quality recycled materials • Specification and guided selection amongst highly variable recycled materials Our Solutions • CESATM antioxidants and process aids to enhance physical properties • SmartHeatTM reduces heat history to minimize yellowing • rePrize™ for PET polymer chain repair and extension CHALLENGES OPPORTUNITIES Avient Corporation 44 45 Multi-material packaging is harder to recycle • Contamination of polymer streams • Issues in sorting • Issues in separation • Trend is to restrict multi-material systems in favor of mono-material constructions • Improve recyclability of PET gas barriers • Barrier system development for Polyolefins • Recyclable barrier systems for film and sheet Our Solutions • Portfolio of compatibilizers to enable multilayer constructions • AmosorbTM to extend beverage shelf life by scavenging oxygen through the bottle wall • CaptureTM to extend product shelf life through oxygen scavenging but without contaminating the bottle • Lactra SX TM to prevent light-induced oxidation in liquid dairy products stored at higher temperatures OPPORTUNITIES CHALLENGES Avient Corporation 45 4: Mono-Material Construction 46 Brand Owners require a consistent brand identity • Inconsistent quality streams pose a challenge to delivering homogeneous product quality and aesthetics to the consumer • Brands demand recycled content, but with color/property consistency • Recyclers are challenged to fulfill needs from brand owners and convertors • Specification and selection of recycled material grades for targeted applications • Simulation of recycled material performance in the end-use application • Leverage re-formulation expertise to provide a consistent packaging product (color and mechanical properties) Our Solutions Our Service and Color Expertise differentiate Avient and allow us to support customers throughout the entire design process • Design for use: Color matching, Color design options • Recycle lot selection • Improving mechanical properties • Improving material processing OPPORTUNITIES CHALLENGES Closer customer collaboration to support recycle efforts Avient Corporation 46 5: Consistent Recycle Material Quality 2016 2021E Growth in Sustainable Solutions *Avient Sustainable Solutions definitions aligned with FTC 2012 Guide for the Use of Environmental Marketing Claims (“Green Guides”) Revenue From Sustainable Solutions* $340M $930M Avient Corporation 47 Future Revenue Growth Assumptions 8-12% CAGR Avient Corporation 48 Healthcare Cathy Dodd High-Impact, High-Growth Industry Medical Equipment / Devices 33% Drug Delivery 19% Medical Supplies 18% Labware 14% Packaging 8% Remote Monitoring 5% $225 $380 $685 2010 2016 2021E Healthcare Submarkets (2021E) Track Record of Sales Growth Personal Wellness 3% ($ millions) Avient Corporation 49 Our Foundation W E A R E P O S I T I O N E D T O W I N Relationships Innovative Solutions Differentiated Services 50Avient Corporation Trends in Healthcare S H A P I N G I N N O V A T I O N & S O L U T I O N S Improved Wellness & Connectedness Globalization & Localization Increasing Life Expectancy Self Management & Self Administration Technology Driving Diagnostic & Remote Monitoring COVID-19 Protection Avient Corporation 51 • Deep, trusted customer relationships • Well-positioned and entrenched in the Healthcare supply chain • Broad & differentiated capabilities • Positioned to respond & execute quickly COVID - 19 Protection A V I E N T W A S S E T A N D R E A D Y Avient Corporation 52 Aging Population T R E A T I N G C H R O N I C C O N D I T I O N S Of the U.S. population is aged 65 or older… and this number is growing Suffer from one or more chronic health conditions Avient Corporation 53 Aging Population T R E A T I N G C H R O N I C C O N D I T I O N S Increasing Life Expectancy Cardiology • 47% of Americans having at least one of three major risk factors for heart disease Diabetes • 193 million people with Type 2 diabetes and will grow to 252 million by 2026 at a 5% CAGR Neurology • Neurological disorders are the second leading cause of death globally, second only to heart disease Avient Corporation 54 Connected Health E X P A N S I O N O F M E D I C A L W E A R A B L E D E V I C E S Improved Wellness & Connectedness Application Opportunities • Flexible components to provide design aesthetics & proper functionality • Robust designs to meet regulatory requirements and perform over long product lifecycles • Patient comfort to promote ongoing use Avient Corporation 55 Remote Patient Monitoring T R A N S L A T I N G D E V I C E S F R O M H O S P I T A L S E T T I N G S T O H O M E Technology Driving Diagnostic & Remote Monitoring Application Opportunities • Durable, chemically-resistant devices to withstand impact in a home environment and exposure to a variety of household cleaners • Miniaturization of devices to fit into limited space in the home, while maintaining maximum functionality • Innovative, user-friendly designs and long-term aesthetics to provide patients with easy-to-use, high-quality, attractive devices in the home Avient Corporation 56 Self Management & Self Administration E N A B L I N G P A T I E N T S T O M A N A G E H E A L T H Self Management & Self Administration Application Opportunities • Combination of rigid & flexible materials to realize design potential and optimize device functionality • Superior chemical resistance to cleaners, disinfectants, hand oils, UV rays, and drugs to extend life of device • Reduced abrasion between mating components to ensure proper dosing • Regulatory-approved colorant and additives to provide branding and drug identification Avient Corporation 57 Trends are Shaping Innovation Professional / Clinic Patient / Home Avient Corporation 58 Avient Design D I F F E R E N T I A T E D S E R V I C E • Global product development support from industrial design through engineering and product launch • Extensive material, manufacturing, industry and value chain knowledge • Human-centric design skill, aligning product innovations with ergonomic needs • Product tear-down capabilities to provide customers with product optimization and cost reduction insights • 3D-printed prototypes and samples to accelerate product development Avient Corporation 59 IDEAIDEA PROOF OF CONCEPT PROOF OF CONCEPT DESIGNDESIGN TOOLINGTOOLING EVALUATIONEVALUATION LAUNCH & DELIVERY LAUNCH & DELIVERY Accelerating Speed to Market with Avient design Avient Corporation 60 Avient Design A U T O I N J E C T O R 61Avient Corporation Avient Design 62 A U T O - I N J E C T O R T E A R - D O W N Defined haptics and soft touch Stringent regulatory requirements Drug contact, mechanical sensitivity for dosing accuracy Lasermarking and laserwelding compatible Strict change control Avient Corporation Avient Design 63 A U T O I N J E C T O R I N N O V A T I O N Avient Corporation Avient Design 64 A U T O I N J E C T O R I N N O V A T I O N Easy to use Safe Quality Protect Ingredients Compliant Temperature Management Avient Corporation 65 Medical Grade TPE Healthcare Colorants High-Density Polymer Laser weldable formulation Laser marking additives Lubricated polymers Avient Corporation Easy to use Safe Quality Protect Ingredients Compliant Temperature Management Avient Design A U T O I N J E C T O R I N N O V A T I O N 17,645 29,445 2021E 2025E Source: BCC Research, Nov. 2020 (LBs millions) Healthcare Growth Outlook Avient Corporation 66 8-10% CAGR Future Revenue Growth AssumptionsMarket for Medical Plastics Investor Day 2021 Break Avient Corporation 68 Composites Chris Pederson $74 $84 $216 $212 $260 $5 $10 $32 $41 $50 0 10 20 30 40 50 60 70 2017 2018 2019 2020 2021E • Prior investments in composites platform and outdoor high performance applications continue to pay off driving substantial growth in 2021 ($ in millions) Composites • Composites will also drive our ability to deliver future revenue growth in excess of GDP Avient Corporation 69 Spotlight: Growth in Composites Composite Material Design Avient Corporation 70 Materials Structure Mfg ProcessPart Properties Lower weight Corrosion resistance Fatigue performance Tailor-ability Design flexibility Composite Material Forms Avient Corporation 71 Manufacturing Costs Continuous Fiber Thermosets Continuous Fiber Thermoplastics Design Flexibility Continuous Fiber Thermosets Continuous Fiber Thermoplastics Discontinuous Fiber Thermoplastics Performance Performance Discontinuous Fiber Thermoplastics Composites Portfolio 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 LFT Tapes Laminates/Panels Shapes Pultrusion Engineered Fibers Avient Corporation 72 Powersports & Outdoor Gear B E N E F I T S O F C O M P O S I T E S STRUCTURAL COMPONENTS Material Replacement • Weight Reduction • Temperature Resistance • Impact Resistance BODY PANELS Paint Replacement • Weight Reduction • Scratch Resistance ADVENTURE GEAR Fatigue Resistance • Lightweight • Temperature Resistance • Impact Resistance Avient Corporation 73 Industrial & Energy B E N E F I T S O F C O M P O S I T E S HIGH PRESSURE PIPE Burst Strength • Corrosion Resistance • Lighter Weight GPS TRACKABLE PALLETS Weight Reduction • Increased Load • Stiffness POWER INFRASTUCTURE Corrosion Resistance • Electrical Insulation • Weight Reduction Avient Corporation 74 $31 $48 $66 $119 2009 2013 2017 2021E ($ millions) Avient Corporation 75 Spotlight: Growth at Fiber-Line Revenue • Fiber-Line business acquired on January 2, 2019 for $120 million • Specialty portfolio of fiber-optic cable applications primarily serving telecommunications end-market • Deep formulation expertise, innovative culture and global commercial presence will accelerate growth related to 5G infrastructure build out Avient Corporation 76 5G Technology Matt Reinhardt Evolution of 5G M E E T I N G S I G N I F I C A N T L Y E X P A N D I N G C O N N E C T I V I T Y N E E D S Avient Corporation 77 How FAST IS 5G?

Among other responsibilities, the Non-Executive Chairman of the Board: • Chairs executive sessions of the non-employee Directors and provides feedback and perspective to the CEO regarding discussions at these sessions; • Facilitates communications between other members of the Board; • Approves meeting agendas and meeting schedules for the Board; • Communicates with the CEO regarding the quality, quantity and timeliness of the flow of information from management to the Board; • Interviews all Board candidates and provides the Governance and Corporate Responsibility Committee with recommendations on each candidate; • Maintains close contact with the Chair of each standing committee and assists in ensuring communications between each committee and the Board; • Considers the retention of advisers and consultants who report directly to the Board; and • Chairs Board meetings. The Consultant regularly attends Compensation Committee meetings, maintains regular contact with the Compensation Committee, and interacts with management to gather the data needed to prepare reports for Compensation Committee review. If you hold your shares through a bank, broker or other nominee, you must follow the instructions found on your voting instruction card, or contact your bank, broker or other nominee in order to revoke your previously delivered proxy, or participate in the Annual Meeting and vote electronically online during the Annual Meeting.

HOME | Contents | Message from the CEO | About Us | People | Products | Planet | Per formance | Metrics | Index Sustainability Report | 2022 91 https://www.avient.com/investors/governance https://www.avient.com/sites/default/files/2023-03/2023%20Avient%20Bookmarked%20Proxy%20Statement%20-%20FINAL.pdf https://www.avient.com/investors/governance https://www.avient.com/sites/default/files/2023-03/2023%20Avient%20Bookmarked%20Proxy%20Statement%20-%20FINAL.pdf https://www.avient.com/investors/governance https://www.avient.com/sites/default/files/2023-03/2023%20Avient%20Bookmarked%20Proxy%20Statement%20-%20FINAL.pdf https://www.avient.com/investors/governance https://www.avient.com/sites/default/files/2023-03/2023%20Avient%20Bookmarked%20Proxy%20Statement%20-%20FINAL.pdf https://www.avient.com/company/policies-and-governance/code-conduct https://www.avient.com/investors/governance https://www.avient.com/sites/default/files/2023-03/Avient%20Annual%20Report%202022.pdf https://www.avient.com/sites/default/files/2023-03/2023%20Avient%20Bookmarked%20Proxy%20Statement%20-%20FINAL.pdf https://www.avient.com/sites/default/files/2023-03/2023%20Avient%20Bookmarked%20Proxy%20Statement%20-%20FINAL.pdf https://www.avient.com/sites/default/files/2023-03/2023%20Avient%20Bookmarked%20Proxy%20Statement%20-%20FINAL.pdf https://www.avient.com/sites/default/files/2023-03/2023%20Avient%20Bookmarked%20Proxy%20Statement%20-%20FINAL.pdf https://www.avient.com/sites/default/files/2023-03/Avient%20Annual%20Report%202022.pdf GRI Standard Disclosure Title Avient Disclosures General Disclosures Reporting Practice 102–47 List of material topics People—Occupational Safety & Health; Management Approach: Training and Development; Management Approach: Diversity & Inclusion Page 21, 24, 27 Products—Management Approach: Product Stewardship; Management Approach: Supplier Collaboration Page 51, 54 Planet—Reducing Emissions; Waste: Preventing, Minimizing, Eliminating Pages 61, 63 Performance Overview Page 74 102–48 Restatements of information EHS Metrics includes estimated full year performance of APM acquisition 102–49 Changes in reporting No change 102–50 Reporting period Januar y 1, 2022 through December 31, 2022 102–51 Date of most recent report This is Avient's 5th sustainability report. 102–52 Reporting cycle At minimum, biennial 102–53 Contact point for questions regarding the report https://www.avient.com/contact-us-now 102–54 Claims of reporting in accordance with the GRI standards This report has been prepared in accordance with the GRI Standards: Core Option Economic Topic Disclosures GRI 201: Economic 103-1, 2 and 3 Management approach – GRI 103 Performance—Performance Overview Page 74 201–1 Direct economic value generated and distributed Avient 2022 Annual Report—Form 10-K Pages 18–19 201–2 Financial implications and other risks and opportunities due to climate change Avient 2022 Annual Report—Form 10-K Page 9–10 Performance—Enterprise Risk Management (ERM) Page 79 Planet—Climate Change, Energy and Greenhouse Gas (GHG) Emissions Page 59 201-3 Defined benefit plan obligations and other retirement plans Avient 2022 Annual Report—Form 10-K Pages 24 & 41 GRI 205: Anti-Corruption 103-1, 2 and 3 Management approach – GRI 103 Performance—The Highest Ethical Standards Page 77 Avient Code of Conduct 205–1 Operations assessed for risks related to corruption Products—Management Approach: Supplier Collaboration Page 54 Performance—The Highest Ethical Standards; Enterprise Risk Management (ERM) Pages 77, 79 Avient Code of Conduct https://www.avient.com/investors/governance 205–2 Communication and training about anti-corruption policies and procedures Performance—The Highest Ethical Standards Page 77 Avient Code of Conduct https://www.avient.com/investors/governance 205–3 Confirmed incidents of corruption and actions taken There were no incidents of corruption in 2022. HOME | Contents | Message from the CEO | About Us | People | Products | Planet | Per formance | Metrics | Index Sustainability Report | 2022 92 https://www.cdp.net/en https://www.avient.com/contact-us-now https://www.avient.com/sites/default/files/2023-03/Avient%20Annual%20Report%202022.pdf https://www.avient.com/sites/default/files/2023-03/Avient%20Annual%20Report%202022.pdf https://www.avient.com/sites/default/files/2023-03/Avient%20Annual%20Report%202022.pdf https://www.avient.com/company/policies-and-governance/code-conduct https://www.avient.com/company/policies-and-governance/code-conduct https://www.avient.com/investors/governance https://www.avient.com/company/policies-and-governance/code-conduct https://www.avient.com/investors/governance https://www.avient.com/company/policies-and-governance/code-conduct https://www.avient.com/investors/governance https://www.avient.com/company/policies-and-governance/code-conduct GRI Standard Disclosure Title Avient Disclosures Environmental Topic Disclosures GRI 301: Materials 301–1 Materials used by weight or volume About Avient—What We Do: Material Science Page 13 Avient 2022 Annual Report—Form 10-K Page 3 301–2 Recycled input materials used Products—How Our Products Enable Sustainability Page 44 301–3 Reclaimed products and their packaging materials Products—How Our Products Enable Sustainability Page 44 GRI 302: Energy 103–1, 2 and 3 Management approach—GRI 103 Planet—Protecting Our Planet; Climate Change Pages 58–59 https://www.avient.com/company/sustainability/planet/environmental-stewardship 302–1 Energy consumption within the organization Planet—Protecting Our Planet; Climate Change Pages 58–59 Metrics—Planet Data and Metrics Page 85 302–2 Energy consumption outside of the organization Planet—Protecting Our Planet; Climate Change Pages 58–59 Metrics—Planet Data and Metrics Page 85 302–3 Energy intensity Metrics—Planet Data and Metrics Page 85 Our energy intensity evaluates all energy usage within the organization. 302–4 Reduction of energy consumption Planet—Protecting Our Planet; Climate Change Pages 58–59 Metrics—Planet Data and Metrics Page 85 302–5 Reductions in energy requirements of products and ser vices Products—How Our Products Enable Sustainability Page 44 Metrics—Planet Data and Metrics Page 85 GRI 303: Water and Effluents 303–1 Interactions with water as a shared resource Planet—Climate Change; Water Intensity and Biodiversity Pages 59, 66 https://www.avient.com/company/sustainability/planet/environmental-stewardship 303–3 Water withdrawal Planet—Climate Change; Water Intensity and Biodiversity Pages 59, 66 Metrics—Planet Data and Metrics Page 87 GRI 305: Emissions 103–1, 2 and 3 Management approach—GRI 103 Planet—Protecting Our Planet; Climate Change Pages 58, 59 Metrics—People and Planet Data and Metrics Page 84–87 305–1 Direct (Scope 1) GHG emissions Planet—Protecting Our Planet; Climate Change Pages 58, 59 Metrics—Planet Data and Metrics Page 86 305–2 Energy indirect (Scope 2) GHG emissions Planet—Protecting Our Planet; Climate Change Pages 58,59 Metrics—Planet Data and Metrics Page 86 305–3 Other indirect (Scope 3) GHG emissions Planet—Protecting Our Planet; Climate Change Pages 58, 59 Metrics—Planet Data and Metrics Page 86 305–4 GHG emissions intensity Planet—Protecting Our Planet; Climate Change Pages 58, 59 Metrics—Planet Data and Metrics Page 86 305–5 Reduction of GHG emissions Planet—Protecting Our Planet; Climate Change Pages 58, 59 Metrics—Planet Data and Metrics Page 86 305–7 Nitrogen oxides (NOX), sulfur oxides (SOX), and other significant air emissions Planet—Conventional Air Emissions Page 67 Metrics—Planet Data and Metrics Page 86 HOME | Contents | Message from the CEO | About Us | People | Products | Planet | Per formance | Metrics | Index Sustainability Report | 2022 93 https://www.avient.com/sites/default/files/2023-03/Avient%20Annual%20Report%202022.pdf https://www.avient.com/company/sustainability/planet/environmental-stewardship https://www.avient.com/company/sustainability/planet/environmental-stewardship GRI Standard Disclosure Title Avient Disclosures Environmental Topic Disclosures GRI 306: Waste 103–1, 2 and 3 Management approach—GRI 103 Planet—Waste: All Sections Pages 63–64 https://www.avient.com/company/sustainability/planet/environmental-stewardship 306–1 Waste generation and significant waste-related impacts Planet—Waste: All Sections Pages 63–64 306–2 Management of significant waste-related impacts Planet—Waste: All Sections Pages 63–64 306–3 Waste generated Planet—Waste: All Sections Pages 63–64 Metrics—Planet Data and Metrics Page 86 306–4 Waste diverted from disposal Planet—Waste: All Sections Pages 63–64 Metrics—Planet Data and Metrics Page 86 306–5 Waste directed to disposal Planet—Waste: All Sections Pages 63–64 Metrics—Planet Data and Metrics Page 86 GRI 307: Environmental Compliance 103–1, 2 and 3 Management approach—GRI 103 People—Management Approach: EH&S Page 19 Products—Management Approach: Product Stewardship Page 51 Planet—Protecting Our Planet Page 58 Avient 2022 Annual Report—Form 10-K Pages 6–7 https://www.avient.com/company/sustainability/planet/environmental-stewardship 307–1 Non-compliance with environmental laws and regulations Products—Management Approach: Product Stewardship Page 51 Avient 2022 Annual Report—Form 10-K Pages 6–7 GRI 308: Supplier Environmental Assessment 103–1, 2 and 3 Management approach—GRI 103 Products—Management Approach: Supplier Collaboration Page 54 Avient Supplier Code of Conduct 308–1 New suppliers that were screened using environmental criteria Products—Management Approach: Supplier Collaboration Page 54 308–2 Negative environmental impacts in the supply chain and actions taken Products—Management Approach: Supplier Collaboration Page 54 Social Topic Disclosures GRI 401: Employment 103–1, 2 and 3 Management approach—GRI 103 People—Management Approach: Training and Development Page 24; Diversity & Inclusion: Leading from the Top Page 26; Management Approach: Diversity & Inclusion Page 27 401–1 New employee hires and employee turnover People—Workforce Demographics Page 31 We hired 1529 new associates in 2022 (this number includes our acquisition, APM). 401–2 Benefits provided to full-time employees that are not provided to temporar y or part-time employees People—Associate Benefits / Awards and Recognition Program; Health and Wellness Pages 32, 34 401–3 Parental leave People—Health and Wellness Page 34 HOME | Contents | Message from the CEO | About Us | People | Products | Planet | Per formance | Metrics | Index Sustainability Report | 2022 94 https://www.avient.com/company/sustainability/planet/environmental-stewardship https://www.avient.com/sites/default/files/2023-03/Avient%20Annual%20Report%202022.pdf https://www.avient.com/company/sustainability/planet/environmental-stewardship https://www.avient.com/sites/default/files/2023-03/Avient%20Annual%20Report%202022.pdf https://www.avient.com/company/policies-and-governance-0/supplier-code-conduct GRI Standard Disclosure Title Avient Disclosures Social Topic Disclosures GRI 403: Occupational Health & Safety 103–1, 2 and 3 Management approach—GRI 103 People—Management Approach: EH&S Page 19 Avient 2022 Annual Report—Form 10-K Pages 5–7 Avient's Position on Human Rights https://www.avient.com/company/sustainability/planet/environmental-stewardship 403–1 Occupational health and safety management system People—Management Approach: EH&S Page 19 Avient 2022 Annual Report—Form 10-K Pages 5–7 People—Occupational Safety & Health Page 21 https://www.avient.com/company/sustainability/planet/environmental-stewardship 403–2 Hazard identification, risk assessment, and incident investigation People—Management Approach: EH&S Page 19 https://www.avient.com/company/sustainability/planet/environmental-stewardship 403–3 Occupational health ser vices People—Occupational Safety & Health Page 21 403–4 Worker participation, consultation, and communication on occupational health and safety People—Management Approach: EH&S Page 19 https://www.avient.com/company/sustainability/planet/environmental-stewardship 403–5 Worker training on occupational health and safety People—Management Approach: EH&S; People—Management Approach: Training and Development Pages 19, 24 403–6 Promotion of worker health People—Occupational Safety & Health; Health and Wellness Pages 21, 34 403–7 Prevention and mitigation of occupational health and safety impacts directly linked by business relationships People—Management Approach: EH&S Page 19 Products—Management Approach: Product Stewardship; Management Approach: Supplier Collaboration Pages 51, 54 Avient 2022 Annual Report—Form 10-K Pages 5–7 https://www.avient.com/company/sustainability/planet/environmental-stewardship 403–8 Workers covered by an occupational health and safety management system People—Management Approach: EH&S Page 19 Avient 2022 Annual Report—Form 10-K Pages 5–7 403–9 Work-related injuries People—Management Approach: EH&S Page 19 Avient 2022 Annual Report—Form 10-K Pages 5–7 Metrics—People and Planet Data and Metrics Pages 84–85 403–10 Work-related ill health People—Management Approach: EH&S Page 19 Avient 2022 Annual Report—Form 10-K Pages 5–7 Metrics—People and Planet Data and Metrics Pages 84–85 GRI 404: Training & Education 10–1, 2 and 3 Management approach—GRI 103 People—Management Approach: Training and Development Page 24 404–1 Average hours of training per year per employee People—Management Approach: Training and Development; Career Training and Performance Feedback Pages 24, 35 In 2022, associates received 142,000 hours of training through a variety of deliver y methods.

Fearon to serve as independent Lead Director Among other responsibilities, the independent Lead Director: Chairs executive sessions of the non­employee Directors and provides feedback and perspective to the Chief Executive Officer regarding discussions at these sessions Facilitates communications between the Chairman and other members of the Board Provides input from the Directors to the Chairman of the Board with regard to agendas and schedules for Board meetings Advises the Chairman of the Board as to the quality, quantity and timeliness of the flow of information from management to the Board and regarding the effectiveness of Board meetings Interviews all Board candidates, and provide the Nominating and Governance Committee with recommendations on each candidate Maintains close contact with the Chair of each standing committee and assists in maintaining communications between each committee and the Board Considers the retention of advisers and consultants who report directly to the Board of Directors Chairs Board meetings when the Chairman of the Board is unable to do so Board Oversight of Risk Management The Board oversees risk management, setting appropriate “tone at the top” The Board assesses and analyzes the most likely areas of current and future risk for the Company on an on- going basis The Board regularly communicates with management regarding materials risks and to convey its expectations clearly Stock Ownership Requirements We maintain robust stock ownership requirements The stock ownership requirement for our Chief Executive Officer is 125,000 shares and for all other directors is 12,500 shares (within five years of onboarding) Board Practices Our Board annually conducts an evaluation of its performance, which includes a peer evaluation of each Director The Nominating and Governance Committee reviews criteria for Board membership and considers changes as needed so that the Board continues to reflect the appropriate mix of skills and experience Non-employee Directors may not stand for re-election following the date of the Director’s 72nd birthday, although the Board may waive this limitation if it determines such waiver to be in the best interests of the Company All Directors stand for election annually We maintain a majority voting policy for uncontested Director elections PROXY STATEMENT POLYONE CORPORATION PolyOne Center 33587 Walker Road Avon Lake, Ohio 44012 PROXY STATEMENT Dated March 29, 2018 Our Board respectfully requests your proxy for use at the Annual Meeting to be held at PolyOne’s corporate headquarters located at PolyOne Center, 33587 Walker Road, Avon Lake, Ohio 44012 at 9:00 a.m. on Thursday, May 17, 2018, and at any adjournments of that meeting. The Consultant maintains regular contact with the Compensation Committee and interacts with management to gather the data needed to prepare reports for Compensation Committee review.

Among other responsibilities, the Non-Executive Chairman of the Board: • Chairs executive sessions of the non-employee Directors and provides feedback and perspective to the CEO regarding discussions at these sessions; • Facilitates communications between other members of the Board; • Approves meeting agendas and meeting schedules for the Board; • Communicates with the CEO regarding the quality, quantity and timeliness of the flow of information from management to the Board; • Interviews all Board candidates and provides the Governance and Corporate Responsibility Committee with recommendations on each candidate; • Maintains close contact with the Chair of each standing committee and assists in ensuring communications between each committee and the Board; • Considers the retention of advisers and consultants who report directly to the Board; and • Chairs Board meetings. The Consultant regularly attends Compensation Committee meetings, maintains regular contact with the Compensation Committee, and interacts with management to gather the data needed to prepare reports for Compensation Committee review. If you hold your shares through a bank, broker or other nominee, you must follow the instructions found on your voting instruction card, or contact your bank, broker or other nominee in order to revoke your previously delivered proxy, or participate in the Annual Meeting and vote electronically online during the Annual Meeting.

Wulfsohn 69 AVIENT CORPORATION [This page intentionally left blank] [This page intentionally left blank] [This page intentionally left blank] STOCK EXCHANGE LISTING Avient's Common Stock is listed on the New York Stock Exchange, Symbol: AVNT SHAREHOLDER INQUIRIES If you have any questions concerning your account as a shareholder, name or address changes, inquiries regarding stock certificates, or if you need tax information regarding your account, please contact our transfer agent: Equiniti Trust Company 1110 Centre Pointe Curve, Suite 101 Mendota Heights, MN 55120-4100 Phone: 1-855-598-2615 or 1-651-450-4064 www.shareowneronline.com Additional information about Avient, including current and historic copies of Annual Reports on Form 10-K and other reports filed with the Securities and Exchange Commission, is available online at www.avient.com or free of charge from: Investor Relations Avient Corporation 33587 Walker Road Avon Lake, Ohio 44012 Phone: 1-440-930-1000 ANNUAL MEETING The annual meeting of Avient will be held virtually via live webcast at 9:00 a.m. FINANCIAL INFORMATION Security analysts and representatives of financial institutions are invited to contact: Joe Di Salvo Vice President, Treasurer and Investor Relations Phone: 1-440-930-1921 Email: giuseppe.disalvo@avient.com AUDITORS Ernst & Young LLP 950 Main Ave., Suite 1800 Cleveland, OH 44113 INTERNET ACCESS Information on Avient’s products and services, news releases, corporate governance, EDGAR filings, Reports on Forms 10-K and 10-Q, etc. as well as an electronic version of this annual report, are available on the Internet at www.avient.com.