Additional detail, systems, and performance metrics are provided in the Occupational Health & Safety section of this report. 0.0 0.3 0.6 0.9 1.2 1.5 2013 2014 2015 2016 2017 2018 2019 2020 In ju ri e s p e r 10 0 W o rk e rs 0.50 COVID-19 Protecting Our People as an Essential Business As a global organization, Avient recognized the early risks associated with the COVID-19 pandemic. In this way, we also keep today’s waste from becoming tomorrow’s contamination. 0 ZERO Reportable Releases IN EXCESS OF PERMITTED LEVEL TO THE ENVIRONMENT SINCE 2013 0 10 20 30 40 50 60 Total Waste Intensity K g W as te /M T P ro d u ct io n 0 6,500 13,000 19,500 26,000 2016 2017 2018 2019* 2020* Total Waste M e tr ic T o n s *To facilitate year over year comparisons, 2019 and 2020 metrics for Planet categories have been presented on a pro forma basis inclusive of the acquisition of the Clariant Masterbatch business. HOME | Contents | Message from the CEO | Who We Are | People | Products | Planet | Performance | Metrics | Index Sustainability Report | 2020 81 https://www.avient.com/sites/default/files/2020-07/avient-audit-committee-charter-rev-10-2019.pdf https://www.avient.com/california-transparency-act-disclosure https://www.avient.com/company/policies-and-governance/code-conduct https://www.avient.com/sites/default/files/2020-07/code-of-ethics-for-ceo-cfo-and-controller.pdf https://www.avient.com/company/policies-and-governance/colormatrix-europe-limited-modern-slavery-and-human-trafficking-statement https://www.avient.com/company/policies-and-governance/colormatrix-europe-limited-modern-slavery-and-human-trafficking-statement https://www.avient.com/sites/default/files/2020-07/avient-compensation-committee-charter-amended-july-2018-name-july-2020.pdf https://www.avient.com/sites/default/files/2020-10/avient-conflict-minerals-policy-10.2020.pdf https://www.avient.com/sites/default/files/2020-07/avient-corporate-governance-guidelines-change-in-ng-committee-name-2020.pdf https://www.avient.com/sites/default/files/2020-10/avient-environmental-policy-august-2020.pdf https://www.avient.com/sites/default/files/2021-04/eeo-updated-2020.pdf https://www.avient.com/company/policies-and-governance/global-policy-anti-bribery-and-anti-corruption https://www.avient.com/company/policies-and-governance/global-policy-antitrust https://www.avient.com/sites/default/files/2020-07/avient-governance-and-corporate-responsibility-committee-charter-rev-2020.pdf https://www.avient.com/company/policies-and-governance/avients-position-human-rights https://www.avient.com/company/policies-and-governance/polyone-corporation-privacy-statement https://www.avient.com/sites/default/files/2020-10/avient-product-stewardship-policy-august-2020.pdf https://www.avient.com/sites/default/files/2020-10/quality-policy.pdf https://www.avient.com/sites/default/files/2021-05/avient-responsible-care-ehs-s-policies-2021.pdf https://www.avient.com/sites/default/files/2020-10/avient-health-safety-policy-august-2020.pdf https://www.avient.com/sites/default/files/2020-10/avient-security-policy-august-2020.pdf https://www.avient.com/sites/default/files/2020-10/supplier-code-of-conduct.pdf https://www.avient.com/company/policies-and-governance/code-conduct M E T R I C S HOME | Contents | Message from the CEO | Who We Are | People | Products | Planet | Performance | Metrics | Index Sustainability Report | 2020 82Sustainability Report | 2020 82 People and Planet Data and Metrics Category 2016 2017 2018 2019 2020 Total TRIR (# - Direct) 0.74 0.69 0.51 0.56 0.50 Total TRIR (# - Contractors) 0.00 0.00 0.00 0.00 0.00 Recordable Injuries (Total #) 51 43 35 36 37 Recordable Illnesses (Total #) 0 0 0 0 0 Total LTIR (# - Direct) 0.29 0.20 0.13 0.29 0.24 Total LTIR (# - Contractors) 0.00 0.00 0.00 0.00 0.00 Total Fatality Rate (# - Direct) 0.00 0.00 0.00 0.00 0.00 Total Fatality Rate (# - Contractors) 0.00 0.00 0.00 0.00 0.00 Process Safety Incident Count (#) 0 0 0 0 0.00 Process Safety Total Incident Rate (#) 0.00 0.00 0.00 0.00 0.00 Process Safety Incident Severity Rate (#) 0.00 0.00 0.00 0.00 0.00 Residual Risk Reduction (# of assessments) NA NA 13,267 7,102 4,258 Residual Risk Point Reduction (#) NA NA 1,035,177 864,997 1,009,830 EH&S Internal Audits (#) 40 53 53 58 37 Workers covered by an EH&S Management Systems (%) 100 100 100 100 100 Workers covered by an internally audited EH&S MS (%) 100 100 100 100 100 Facilities w/ an externally certified EH&S MS (%)* 20 24 30 35 74 Suppliers w/ an externally certified EH&S MS (% of surveyed) NA NA NA NA 81 Transport Incidents (# - US DOT 5800/EU ADR) 0 0 0 0 0 Capital Invested in EH&S ($MM USD) 5.305 5.201 8.858 7.870 4.910 *Includes Responsible Care Management System, Responsible Care 14001, ISO 14001, ISO 45001, ISO 50001, & OHSAS 18001.

EBITDA, free cash floff w, free cash flow with or without specific capital expenditure target or range, including or excluding divestments and/or acquisitions, total cash floff w, cash flow in excess of cost of capital or residual cash floff w or cash flow return on investment); • Returns (e.g., Profitsff or Cash Flow returns on: assets, invested capital, net capital employed, sales, and equity); • Working Capital (e.g., working capital divided by sales, days’ sales outstanding, days’ sales inventory, and days’ sales in payables); • Profit Margins (e.g., Profits divided by revenues, gross margins and material margins divided by revenues, and material margin divided by sales pounds); • Liquidity Measures (e.g., debt-to-capital, debt-to-EBITDA, total debt ratio); • Sales Growth, Gross Margin Growth, Cost Initiative and Stock Price Metrics (e.g., revenues, revenue growth, revenue growth by targeted country, region or end market, gross margin and gross margin growth, material margin and material margin growth, stock price appreciation, total return to shareholders, sales and administrative costs divided by sales, and sales and administrative costs divided by profits); and • Strategic Initiative Key Deliverable Metrics consisting of one or more of the folff lowing: product development, strategic partnering, research and development, vitality index, market penetration, geographic business expansion goals, cost targets, customer satisfaction, employee satisfaction, management of employment practices (including succession planning and talent development) and employee benefitsff , supervision of litigation and inforff mation technology, and goals or synergies relating to acquisitions or divestitures of subsidiaries, affiliates and joint ventures. w) “Perforff mance Period” means, in respect of a Cash Incentive Award, Perforff mance Share or Performance Unit, a period of time established pursuant to Section 8 of this Plan within which the Management Objectives relating to such Cash Incentive Award, Perforff mance Share or Perforff mance Unit are to be achieved.

LEARN MORE Avient Sustainability *The American Chemistry Council’s RC14001® standard is a 3rd party certification that provides a framework for companies to implement a comprehensive environmental, health, safety, and security management system, particularly within the chemical industry **World Resources Institute (WRI) Aqueduct Water Risk Atlas GOAL 2024 ACHIEVEMENT BUSINESS DRIVER 55% 2030 Greenhouse Gas Emissions Reduction in Scope 1 & 2 emissions vs. 2019 52% Energy efficiency improvements and green energy procurement Delivers energy efficiency & cost savings outcomes Alignment with stakeholder expectations and commitments 3% Annual Waste to Landfill Reduction in waste to landfill intensity 5% 50 “landfill free” sites Drives operational efficiencies and cost savings Enables circular economy and resource conservation 60% 2030 Renewable Energy Source electricity from renewable sources 61% Green electricity purchase agreements Decreases reliance on fossil fuel-driven energy sources Reduces scope 2 emissions in support of our GHG reduction target 90% 2030 Suppliers Assessed Assess supplier spend for alignment with our Sustainability objectives 75% EcoVadis to facilitate assessments Mitigates supply chain risk for Avient and our customers Drives transparency and accountability throughout the value chain N E W F O R 2 02 5 GOAL BUSINESS DRIVER 75% 2030 Environmental, Health & Safety Management Systems Sites achieving the ACC RC14001® certification* to support our culture of safety and sustainability A culture of safety and sustainability is a foundational strength of our company The ACC RC14001 certification drives business performance though ethical leadership, operational excellence, safety, and stakeholder trust Currently 47% of our sites are certified in 2024 100% 2030 Water Stewardship Sites implementing water stewardship plans in extremely high-risk areas as assessed using WRI Aqueduct Water Risk Atlas** Water stewardship plans enable proactive management of water-related risks, help safeguard operations, reduce environmental impact, and build stakeholder trust—turning environmental responsibility into a competitive advantage Currently 26% of our manufacturing sites are located in extremely high-risk water locations 100% Annual Community Engagement Sites actively engaged with their local communities Actively engaging in communities builds trust, fosters collaboration, and creates long-term value through trusted local partnerships 100% of our sites engaged with their communities in a positive way in 2024 Sustainability Report | 2024 13Contents | About Avient | Message from the CEO | Sustainability at Avient | Enabling a Sustainable World | Preserving the Planet | Culture of Safety & Sustainability | Governance | Appendix https://www.avient.com/company/sustainability/sustainability-report/goals-commitments/2030-goals-progress https://www.avient.com/company/sustainability/sustainability-report/goals-commitments/2030-goals-progress https://www.avient.com/company/sustainability/sustainability-report/goals-commitments/2030-goals-progress https://www.avient.com/company/sustainability/sustainability-report/goals-commitments/2030-goals-progress https://www.americanchemistry.com/ https://www.wri.org/aqueduct Sustainability Performance & Recognition Building on our culture of sustainability, Avient continues to be recognized by third party rating agencies and awards. Safety Milestones 2024 99.5% 45% 3851% Global Site Ergonomic Events Global Participation Safety Engagement Reduction in Hand Injuries YoY Improvement in Lost-time Injury Rate YoY 0.00 0.25 0.50 0.75 1.00 In ju ri e s p e r 10 0 W o rk e rs 0.40 Total Recordable Incident Rate (TRIR) by Year 2020 2021 2022 2023 2024 0.50 0.55 0.51 0.58 Sustainability Report | 2024 34Contents | About Avient | Message from the CEO | Sustainability at Avient | Enabling a Sustainable World | Preserving the Planet | Culture of Safety & Sustainability | Governance | Appendix Occupational safety, health and well-being are paramount at Avient because we understand the value of good performance in these areas to our people, their families, collective morale, operational costs, our contractors, the communities in which we operate, and our reputation.

W W W .

O’BRYON Vice President, Treasurer VINCENT W. O’BRYON Vice President, Treasurer VINCENT W.

Parameters used in the RCP 2.6 scenario, which limits the radiative forcing to 2.6 W/m2, included measurable factors i.e. total insured value (TIV) exposed due to the impact of acute (drought, heavy precipitation, heatwaves etc.) and chronic (changing wind patterns, heat stress, sea level rise etc.) physical climate risks based on property value and business interruption in the medium (by 2030) to long term time-horizon (by 2050). Parameters used in the RCP 4.5 scenario, which limits the radiative forcing to 4.5 W/m2, included measurable factors i.e. total insured value (TIV) exposed due to the impact of acute (drought, heavy precipitation, heatwaves etc.) and chronic (changing wind patterns, heat stress, sea level rise etc.) physical climate risks based on property value and business interruption in the medium (by 2030) to long term time-horizon (by 2050). The scenarios chosen for physical climate-related risk scenario analysis are low, intermediate and high based on the RCP 2.6, RCP 4.5 and RCP 8.5 scenarios. 111 Parameters used in the RCP 4.5 scenario, which assumes the radiative forcing increases up to 8.5 W/m2, included measurable factors i.e. total insured value (TIV) exposed due to the impact of acute (drought, heavy precipitation, heatwaves etc.) and chronic (changing wind patterns, heat stress, sea level rise etc.) physical climate risks based on property value and business interruption in the medium (by 2030) to long term time-horizon (by 2050).

��� ��� ��� ��� ��� ��� ��� ��� ��� In ju ri e s p e r 10 0 W o rk e rs 0.58 Injury Incidence Rate* Rubber & Plastics Mfg.

��� ��� ��� ��� ��� ��� ��� ��� ��� In ju ri e s p e r 10 0 W o rk e rs 0.58 Injury Incidence Rate* Rubber & Plastics Mfg.

Skills/Experience A be rn at hy Fe ar o n G o ff G re en Je lli so n K ha nd pu r Li n M in k N ic o la s P re et e V er du in W ul fs o hn Financial Knowledge of finance or financial reporting; experience with debt/capital market transactions and/or mergers and acquisitions l l l l l l l l l International Experience doing business internationally or focused on international issues and operations and exposure to markets, economies, and cultures outside the U.S. l l l l l l l l l l l l Industry Expertise Significant experience in the Company’s businesses and industries l l l l l l l l l Regulatory Experience in government and regulatory affairs, and regulated industries, including as part of a business and/or through positions with government organizations and regulatory bodies l l l l l l l l Technology Technical or scientific knowledge and experience implementing technology strategies l l l l l Human Capital Experience in management of labor relations, in human resources, and talent management l l l l l l l l l l Operations Experience overseeing complex operations and developing and implementing operational plans and business operations strategy l l l l l l l l l l l Corporate Governance Experience and understanding of governance matters and principles, including management accountability, transparency and protection of shareholder interests l l l l l l l l l l l l IT and Cybersecurity Experience and understanding of information security, data privacy and cybersecurity l l l l Sustainability Experience in environmental matters, community affairs, and/or corporate responsibility initiatives including sustainability l l l l l l l l l l l l Other Public Company Boards 1 3 — — 2 1 2 2 — 1 2 1 OUR PURPOSE AND STRATEGIC FRAMEWORK PROXY STATEMENT 2025 | Annual Meeting of Shareholders 7 Governance Highlights As part of our commitment to overall excellence, our Company’s governance practices include the following: Director Independence • Eleven out of our twelve Director nominees are independent. • The independent Directors regularly hold executive sessions without management at Board and committee meetings.

Skills/Experience Ab er na th y Fe ar on Go ff Gr ee n Je lli so n Li n M in k N ic ol as Pa tt er so n Pr ee te Ve rd ui n W ul fs oh n Financial          International             Industry Expertise          Regulatory        Technology     Human Capital           Operations            Corporate Governance          IT and Cybersecurity      Sustainability             Background Gender Male Male Male Male Male Female Female Male Male Male Female Male Race/Ethnicity White White White Black White White White Black White White White White Other Public Company Boards 1 3 1 — — 2 2 — 1 2 — 1 PROXY SUMMARY PROXY STATEMENT 2022 | Annual Meeting of Shareholders 13 GOVERNANCE HIGHLIGHTS As part of our commitment to overall excellence, our Companyʼs governance practices include the following: Director Independence • Strong commitment to Director independence: Eleven out of our twelve Director nominees are independent. • The independent Directors regularly hold executive sessions, led by the independent Lead Director.