On December 4, 2024, we presented our new strategy at the New York Stock Exchange during our Investor Day.

PolyOne Investor Presentation 3Q 2016 Morgan Stanley Global Chemicals and Agriculture Conference November 2016 POLYONE CORPORATION 2 Forward-Looking Statements  In this presentation, statements that are not reported financial results or other historical information are “forward-looking statements” within the meaning of the Private Securities Litigation Reform Act of 1995. PolyOne Investor �Presentation�3Q 2016 Forward-Looking Statements Use of Non-GAAP Measures About PolyOne What We Do At a Glance Slide Number 7 28 Consecutive Quarters of EPS Growth Proof of Performance & 2020 Goals Ours is Not a Cost Cutting Story Innovation Drives Earnings Growth Strategic Growth Opportunities Primary Industries Served Slide Number 14 Slide Number 15 Slide Number 16 Slide Number 17 Free Cash Flow and Strong Balance Sheet �Fund Investment / Shareholder Return Returning Cash to Shareholders Why Invest In PolyOne? Segment Highlights At a Glance: Color, Additives & Inks At a Glance: Specialty Engineered Materials At a Glance: Designed Structures & Solutions At a Glance: Performance Products & Solutions At a Glance: Distribution Application Examples Luxury Packaging�with Gravitech Density Modified Polymers Medical Device Housings�with Chemically Resistant Engineered Polymers Printed Circuit Boards�with Thermally Conductive Polymers Color & Design Services Outdoor Applications Fiber Colorants�Solutions for clothing, apparel, footwear, automotive & sporting goods Slide Number 34 Metal Replacement Solutions High-Barrier Packaging Containers Investor Presentation - November 2016 r4 (2).pdf Investor Presentation - November 2016

PolyOne Corporation Page 1 PolyOne Investor Presentation Goldman Sachs Basic Materials Conference May 2016 PolyOne Corporation Page 2 Forward-Looking Statements  In this presentation, statements that are not reported financial results or other historical information are “forward-looking statements” within the meaning of the Private Securities Litigation Reform Act of 1995. POL IR Presentation (Goldman Sachs Basic Materials Conference - 2016) ��PolyOne Investor Presentation�Goldman Sachs Basic Materials Conference�May 2016�� Forward-Looking Statements Use of Non-GAAP Measures PolyOne Commodity to Specialty Transformation Confirmation of Our Strategy 26 Consecutive Quarters of EPS Growth PolyOne�At A Glance Mix Shift Highlights Specialty Transformation Color and Engineered Materials at the�Heart of Specialty Transformation Proof of Performance & 2020 Goals Slide Number 11 Slide Number 12 Slide Number 13 Slide Number 14 Innovation Drives Earnings Growth Ours is Not a Cost Cutting Story Design and Service as a Differentiator Customer First Through World-Class Service Debt Maturities & Pension Funding Free Cash Flow and Strong Balance Sheet �Fund Investment / Shareholder Return Why Invest In PolyOne? Appendix 1Q 2016 Financial Highlights At a Glance�Color, Additives and Inks At a Glance�Specialty Engineered Materials At a Glance�Designed Structures and Solutions At a Glance�Performance Products and Solutions At a Glance�Distribution Plastics: Key to Future Sustainable Development Application Examples Outdoor Applications Slide Number 32 Authentication Technology Metal Replacement Solutions Range Rover Evoque Interior Slide Number 36 High-Barrier Packaging Containers Aerospace Applications Investor Presentation - May 17, 2016 r7 Investor Presentation - May 17, 2016

Senior management believes these measures are useful to investors because they allow for comparison to PolyOne's performance in prior periods without the effect of items that, by their nature, tend to obscure PolyOne's operating results due to the potential variability across periods based on timing, frequency and magnitude. Investor Presentation for Website PolyOne investor presentation Forward Looking Statements USE OF �NON-GAAP�MEASURES Vision Safety First PolyOne�2017 Revenue | $3.2 billion Proof of Performance Sustainable Path to Double-Digit EPS Growth Investment in Commercial Resources driving growth The Evolving Customer Relationship Slide Number 11 New Resources Fueling the Future Aligning with trends for Growth Innovation 3 Horizons of Development Innovation Pipeline Innovation Spotlight: Composites Composites Refresher Strategic Investment History COMPOSITES in Transportation Invest-to-Grow M&A Strategy Invest-to-Grow M&A Playbook Invest-to-Grow Proof of performance Invest-to-Grow Driving the future Strong Pipeline�driven by fragmented Market Returning cash to shareholders�Over $1 Billion since 2011 ROIC drives shareholder return Why Invest In PolyOne? Service:�The Timeless differentiator Talent development IQ DESIGN LABS LSS CUSTOMER FIRST 3D Printing�Bringing New ideas to life Slide Number 34 Innovating with PolyOne COLOR, ADDITIVES & INKS Color, Additives & Inks Specialty Engineered Materials Specialty Engineered Materials Performance Products & Solutions Performance Products & Solutions DISTRIBUTION Target end markets & �application examples Slide Number 44 Slide Number 45 Slide Number 46 Slide Number 47 Slide Number 48 Slide Number 49 Slide Number 50 Slide Number 51 Slide Number 52 Slide Number 53 Slide Number 54 Slide Number 55 Investor Presentation - June 2018 Investor Presentation - March 2018 Adjusted EBITDA

Slide 1 PolyOne Corporation Page 1 PolyOne Investor Presentation Bank of America Merrill Lynch 2014 US Basic Materials Conference Boston, MA December 11, 2014 PolyOne Corporation Page 2 Forward-Looking Statements  In this presentation, statements that are not reported financial results or other historical information are “forward-looking statements” within the meaning of the Private Securities Litigation Reform Act of 1995. ��PolyOne Investor Presentation�Bank of America Merrill Lynch �2014 US Basic Materials Conference�Boston, MA�December 11, 2014�� Forward-Looking Statements Use of Non-GAAP Measures PolyOne Commodity to Specialty Transformation PolyOne�At A Glance Mix Shift Highlights Specialty Transformation Confirmation of Our Strategy Strategy and Execution Drive Results Proof of Performance & 2015 Goals 32% Adjusted EPS CAGR from 2011 Innovation Drives Earnings Growth A Rich Pipeline of Opportunity Megatrends Aligned with Key End Markets Debt Maturities & Pension Funding – 9/30/14 Free Cash Flow and Strong Balance Sheet �Fund Investment / Shareholder Return PolyOne Core Values Why Invest In PolyOne?

Slide 1 PolyOne Corporation Page 0 PolyOne Investor Presentation Jefferies 2014 Global Industrials Conference New York, NY August 12, 2014 PolyOne Corporation Page 1 Forward-Looking Statements  In this presentation, statements that are not reported financial results or other historical information are “forward-looking statements” within the meaning of the Private Securities Litigation Reform Act of 1995. ��PolyOne Investor Presentation�Jefferies 2014 Global Industrials Conference�New York, NY�August 12, 2014�� Forward-Looking Statements Use of Non-GAAP Measures PolyOne Commodity to Specialty Transformation PolyOne�At A Glance Mix Shift Highlights Specialty Transformation Confirmation of Our Strategy Strategy and Execution Drive Results Proof of Performance & 2015 Goals Bridge to $2.50 Adjusted EPS by 2015 Innovation Drives Earnings Growth A Rich Pipeline of Opportunity* Unique and Innovative Solutions Megatrends Aligned with Key End Markets Debt Maturities & Pension Funding – 6/30/14 Free Cash Flow and Strong Balance Sheet �Fund Investment / Shareholder Return PolyOne Core Values Why Invest In PolyOne?

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A majority of associates have full-time contracts. 102–9 Supply chain Avient 2022 Annual Report—Form 10-K Page 5 102–10 Significant changes to the organization and its supply chain Avient 2022 Annual Report—Form 10-K Page 18 102–11 Precautionar y Principle or approach Avient 2022 Annual Report—Form 10-K Page 8–12 102–12 External initiatives About Us—Who We Are Page 12 People—Security, Becoming an Even Better Place to Work Page 23, Page 40 Products—Strategic Partnerships and Alliances Page 56 102–13 Membership of associations Strategic Partnerships and Alliances Page 56 Alliance to End Plastic Waste American Composites Manufacturers Association Association of Plastic Recyclers (APR) Operation Clean Sweep PET Container Recycling Europe (PetCore) Plastics Recyclers Europe (PRE) RecyClass Responsible Mica Initiative The Microfibre Consortium (TMC) UK Plastic Pact HOME | Contents | Message from the CEO | About Us | People | Products | Planet | Per formance | Metrics | Index Sustainability Report | 2022 89 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/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/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 GRI Standard Disclosure Title Avient Disclosures General Disclosures Strategy 102–14 Statement from senior decision-maker 2022 Sustainability Report—Message from the CEO Page 3 102–15 Key impacts, risks, and opportunities Avient 2022 Annual Report—Form 10-K Page 7–12 Products—Innovation: Formulating for the Future Page 42 Ethics & Integrity 102–16 Values, principles, standards, and norms of behavior About Us—Who We Are Page 12 Avient 2022 Annual Report—Vision and Strategy 102–17 Mechanisms for advice and concerns about ethics Performance—Ethics Hotline and Reporting Page 78 Governance 102–18 Governance structure Performance—Board of Directors Governance Page 80 People—Management Approach: EH&S Page 19 Avient 2022 Annual Report—Form 10-K Pages 13–14 & 69 Avient 2023 Proxy Statement—Pages 14–16 https://www.avient.com/investors/governance 102–20 Executive-level responsibility for economic, environmental, and social topics Performance—Board of Directors Governance Page 80 People—Management Approach: EH&S Page 19 People—Management Approach: Training and Development Page 24 People—Management Approach: Diversity & Inclusion Page 27 Products—Management Approach: Product Stewardship Page 51 Products—Management Approach: Supplier Collaboration Page 54 https://www.avient.com/investors/governance 102–22 Composition of the highest governance body and its committees Avient 2022 Annual Report—Form 10-K Pages 13–14, & 69 Performance—Board of Directors Governance Page 80–81 102–23 Chair of the highest governance body Avient 2023 Proxy Statement—Page 22 102–24 Nominating and selecting the highest governance body Performance—Board of Directors Governance Page 80–81 Avient 2022 Annual Report—Form 10-K Pages 13–14 Avient 2023 Proxy Statement Page 17 https://www.avient.com/investors/governance 102–25 Conflicts of interest Performance—Board of Directors Governance Page 80–81 Avient Code of Conduct https://www.avient.com/investors/governance 102–26 Role of highest governance body in setting purpose, values, and strategy Performance—Board of Directors Governance Page 80–81 Avient 2022 Annual Report—Form 10-K Pages 13–14 & 69 Avient 2023 Proxy Statement Pages 46–48 https://www.avient.com/investors/governance 102–27 Collective knowledge of highest governance body Performance—Board of Directors Governance Page 80–81 Avient 2023 Proxy Statement Pages 14–16 102–28 Evaluating the highest governance body's performance Performance—Board of Directors Governance Page 80–81 Avient 2023 Proxy Statement Pages 49–53 https://www.avient.com/investors/governance HOME | Contents | Message from the CEO | About Us | People | Products | Planet | Per formance | Metrics | Index Sustainability Report | 2022 90 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/sites/default/files/2023-03/2023%20Avient%20Bookmarked%20Proxy%20Statement%20-%20FINAL.pdf https://www.avient.com/investors/governance 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/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/investors/governance 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/investors/governance 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/investors/governance GRI Standard Disclosure Title Avient Disclosures General Disclosures Governance 102–29 Identifying and managing economic, environmental, and social impacts Performance—Board of Directors Governance Page 80–81 People—Management Approach: EH&S Page 19 https://www.avient.com/investors/governance 102–30 Effectiveness of risk management processes Performance—Enterprise Risk Management (ERM); Board of Directors Governance; Pages 79, 80 Avient 2023 Proxy Statement Pages 46–47 https://www.avient.com/investors/governance 102–31 Review of economic, environmental, and social topics Performance—Enterprise Risk Management (ERM); Board of Directors Governance; Pages 79, 80 Avient 2023 Proxy Statement Page 46–47, 51 https://www.avient.com/investors/governance 102–32 Highest governance body's role in sustainability reporting Message from the Governance and Corporate Responsibility Committee Page 4 Performance—Board of Directors Governance Page 80–81 Avient 2023 Proxy Statement Page 46–47, 51 https://www.avient.com/investors/governance 102–33 Communicating critical concerns Performance—Board of Directors Governance Page 80–81 Avient 2023 Proxy Statement Page 46–48, 51 Avient Code of Conduct https://www.avient.com/investors/governance 102–34 Nature and total number of critical concerns Avient 2022 Annual Report—Form 10-K Pages 56–57 102–35 Remuneration Policies Avient 2023 Proxy Statement Pages 66–72, 75–84 102–36 Process for determining remuneration Avient 2023 Proxy Statement Pages 66–72 102–37 Stakeholders' involvement in remuneration Avient 2023 Proxy Statement Pages 66–67 102–38 Annual total compensation ratio Avient 2023 Proxy Statement Page 85 Stakeholder Engagement 102–40 List of stakeholder groups About Us—Engaging with Our Stakeholders Page 9 102–41 Collective bargaining agreements Workforce Demographics—Employee Representation Page 31 102–42 Identifying and selecting stakeholders About Us—Engaging with Our Stakeholders Page 9 102–43 Approach to stakeholder engagement About Us—Engaging with Our Stakeholders Page 9 102–44 Key topics and concerns raised About Us—Engaging with Our Stakeholders Page 9 Reporting Practice 102–45 Entities included in the consolidated financial statements Avient 2022 Annual Report—Form 10-K Page 2–3 We operate in three reportable segments: (1) Color, Additives and Inks; (2) Specialty Engineered Materials; and (3) Distribution. 102–46 Defining report content and topic boundaries The information in this report applies to Avient and all owned facilities, joint ventures, and operating companies globally within the reporting period, unless otherwise stated. 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. Avient Code of Conduct https://www.avient.com/investors/governance GRI 206: Anti-Competitive Behavior 103–1, 2 and 3 Management approach—GRI 103 Avient Code of Conduct 206–1 Legal actions for anti-competitive behavior, anti-trust, and monopoly practices No legal actions were brought against Avient for anti-competitive behavior, anti-trust, or monopoly practices in 2022.

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