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. Supplier Evaluation 2030 GOAL 90% Suppliers Assessed Assess supplier spend for alignment with our Sustainability objectives 75% in 2024 Sustainability Report | 2024 24Contents | 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/sites/default/files/2023-12/Avient_Environmental%20Policy_Dec_18_2023.pdf https://www.avient.com/sites/default/files/2023-12/Avient_Health_And_Safety_Policy_Dec_18_2023.pdf https://www.avient.com/company/policies-and-governance/supplier-code-conduct https://www.avient.com/company/policies-and-governance-0/avients-human-rights-policy https://www.avient.com/sites/default/files/2023-12/Avient%20Quality%20Policy%20-%20Dec%2018%202023%5B83%5D.pdf https://www.avient.com/sites/default/files/2024-03/Global%20Supplier%20Quality%20Manual_2024.pdf https://www.responsiblemineralsinitiative.org/ https://www.avient.com/sites/default/files/2020-10/avient-conflict-minerals-policy-10.2020.pdf https://www.avient.com/company/policies-and-governance/supplier-code-conduct https://www.ilo.org/ https://www.avient.com/company/policies-and-governance-0/code-conduct https://www.avient.com/company/policies-and-governance-0/supplier-code-conduct https://www.avient.com/company/policies-and-governance-0/supplier-code-conduct https://ecovadis.com/suppliers/ Strategic Partnerships and Alliances Our Industry and Value Chain Sustainability Partners American Composites Manufacturers Association (ACMA) Association of Plastic Recyclers (APR) Bio-based Industries Consortium Circular Plastics Alliance Cosmetics, Packaging and Toxicology (CosPaTox) Consortium National Association for PET Container Resources (NAPCOR) Operation Clean Sweep PETCORE EUROPE Plastics Recyclers Europe RecyClass The Microfibre Consortium Sustainability Report | 2024 25Contents | About Avient | Message from the CEO | Sustainability at Avient | Enabling a Sustainable World | Preserving the Planet | Culture of Safety & Sustainability | Governance | Appendix https://acmanet.org/ https://plasticsrecycling.org/ https://biconsortium.eu/ https://single-market-economy.ec.europa.eu/industry/strategy/industrial-alliances/circular-plastics-alliance_en https://cospatox.com/ https://napcor.com/ https://www.opcleansweep.org/ https://www.petcore-europe.org/ https://www.plasticsrecyclers.eu/who-we-are https://recyclass.eu/ https://www.microfibreconsortium.com/ https://www.petcore-europe.org/ https://plasticsrecycling.org/ https://www.plasticsrecyclers.eu/who-we-are https://www.microfibreconsortium.com/ https://www.opcleansweep.org/ https://recyclass.eu/ https://acmanet.org/ https://single-market-economy.ec.europa.eu/industry/strategy/industrial-alliances/circular-plastics-alliance_en https://cospatox.com/ https://napcor.com/ https://biconsortium.eu/ Preserving the Planet Protecting the Environment Climate Change Reducing Emissions Across Our Value Chain Waste: Preventing, Minimizing, Eliminating Water Stewardship and Biodiversity Conventional Air Emissions Sustainability Report | 2024 26Contents | About Avient | Message from the CEO | Sustainability at Avient | Enabling a Sustainable World | Preserving the Planet | Culture of Safety & Sustainability | Governance | Appendix Our Paths to Carbon Neutrality Climate change is a pressing issue facing the world today and is creating risks and opportunities for businesses across all industries. Approximately 90% of our Scope 3 emissions come from purchased goods and services and downstream processing of sold products (65% and 24% respectively).

S&P 500 -100% 0% 100% 200% 300% 400% 500% 600% POL S&P 500 PolyOne Corporation Page 85 Formula for Success Innovation Market Beating Performance Excellence in Execution PolyOne Corporation Page 86 Track Record of Successful Acquisitions $12 $50 2007 2014 $22 $39 2012 2014 $24 $69 2012 2014 GLS ColorMatrix Spartech OI in $ millions PolyOne Corporation Page 87 Driving Toward Premier Profitability EBIT Margins for top tier companies Victrex 41% 18% Albemarle Eastman 17% Hexcel 17% FMC 16% Ecolab 14% 12% Specialty EBIT Margin – 2014 IFF 19% Celanese 13% PolyOne Corporation Page 88 2006 2014 2020 “Where we were” “Where we are” Platinum Vision Operating Income % Specialty: Global Color, Additives & Inks 1.7% 14.7% 20%+ Global Specialty Engineered Materials 1.1% 12.1% 20%+ Designed Structures & Solutions 1.4%(2012) 7.3% 12 – 14% Performance Products & Solutions 5.5% 7.7% 10 – 12% Distribution 2.6% 6.1% 6.5 – 7.5% Specialty Platform % of Operating Income 6.0% 65% 80%+ ROIC 5.0% 11.3% 15% Adjusted EPS Growth N/A 37% Double Digit Expansion 2020 Platinum Vision PolyOne Corporation Page 89 Platinum Vision: Pathway to Accelerated Growth Organic Sales Growth Margin Expansion Share Repurchases Acquisitions PolyOne Corporation Page 90 2006 2010 2014 2020 Driving Toward a Premium Specialty Multiple 6x 4x Commodity POL 8x Hybrid 10x 14x+ Mid-Tier Specialty Premium Specialty M ul tip le POL POL POL PolyOne Corporation Page 91 The New PolyOne: A Specialty Growth Company Why Invest In PolyOne?

Generally, the Secretary must not receive the notice less than 60 nor more than 90 days prior to the first anniversary of the date on which we first mailed our proxy materials for the preceding year’s Annual Meeting. In general, Regulation 8(c) provides that, to be timely, a shareholder’s notice must be delivered to our principal executive offices not less than 60 nor more than 90 days prior to the firff st anniversary of the date on which we first mailed our proxy materials for the preceding year’s Annual Meeting. Sixty days prior to the firff st anniversary of this date will be January 30, 2018, and 90 days prior to the first anniversary of this date will be 76 MISCELLANEOUS December 31, 2017.

Yes No Indicate by check mark whether the registrant: (1) has filed all reports required to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during the preceding 12 months (or for such shorter period that the registrant was required to file such reports), and (2) has been subject to such filing requirements for the past 90 days. In January 2017, the FASB issued Auditing Standards Update 2017-04, Intangibles - Goodwill and Other (Topic 350): Simplifying the Accounting for Goodwill Impairment.

Stan-Tone™ EPX Epoxy Dispersions

STOCK PERFORMANCE PolyOne’s stock performance has significantly outpaced the S&P 500 index and the S&P Mid Cap Chemicals index. 12.31.09 12.31.10 12.31.11 12.31.12 12.31.13 12.31.14 12.31.15 Operating Income % Specialty Color, Additives & Inks Specialty Engineered Materials Designed Structures & Solutions PP&S Distribution Specialty Platform Operating Income % of Total ROIC** (after-tax) Adjusted EPS Growth 2006 “Where we were” 1.7% 1.1% — 5.5% 2.6% 6.0% 5.0% N/A 2015 “Where we are” 16.7% 14.7% 3.0% 8.3% 6.6% 65% 11.8% 25 Consecutive Quarters of YOY EPS Growth 2020 Platinum Vision 20% + 20% + 12–14% 10–12% 6.5–7.5% 80% + 15% Double Digit Expansion **ROIC is defined as TTM adjusted OI divided by the sum of average debt and equity over a 5 quarter period 500 400 300 200 100 0 P ER CE NT AG E POL S&P MID CAP CHEMICALS S&P 500 ANNUAL REPORT 2015 SPECIALTY DISTRIBUTION PP&S JV’S % O F O PE RA TI NG IN CO M E 2005 2007 2009 2011 2013 2015 OPERATING INCOME MIX SHIFT*^ 100 80 60 40 20 0 100+100+100+100+10050+77+80+97+100+10010+32+53+82+82+841+18+34+51+61+64 *Operating Income excludes Corporate charges and special items ^2005–2009 has not been restated for subsequent changes in accounting principles or discontinued operations +5 +33 +41 +50 +65 +90 +98 2.00 1.80 1.60 1.40 1.20 1.00 .80 .60 .40 .20 0 2009 2010 2011 2012 2013 2014 2015 ADJUSTED EARNINGS PER SHARE ◊† U. Yes ‘ No Í Indicate by check mark whether the registrant: (1) has filed all reports required to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during the preceding 12 months (or for such shorter period that the registrant was required to file such reports), and (2) has been subject to such filing requirements for the past 90 days.

PolyOne’s stock performance has significantly outpaced the S&P 500 index and the S&P Mid Cap 400 Chemicals index. 12.31.09 6.30.10 12.31.10 6.30.11 12.31.11 6.30.12 12.31.12 6.30.13 12.31.13 2007 2008 2009 2010 2011 2012 2013 SPECIALTY PLATFORM OPERATING INCOME % OF TOTAL*^ 1.50 1.20 .90 .60 .30 0 2007 2008 2009 2010 2011 2012 2013 ADJUSTED EARNINGS PER SHARE*† * 2010–2013 Specialty Operating Income is restated for the divestiture of the Resin Business ^Operating Income excludes Corporate Charges * 2010–2013 adjusted EPS is restated for the divestiture of the Resin Business † EPS excluding special items and equity income from SunBelt 2007 2008 2009 2010 2011 2012 2013 * 2010–2013 adjusted return on sales is restated for the divestiture of the Resin Business ° Operating Income as a percentage of sales, excluding special items and equity income from SunBelt ADJUSTED RETURN ON SALES*º 8 6 4 2 0 % P E R C E N TA G E 80 60 40 20 0 % P E R C E N TA G E Operating Income % Specialty PP&S Distribution Specialty Platform Operating Income % of Total ROIC** (after-tax) 2006 1.5% 5.5% 2.6% 6.0% 5.0% 2013 9.4% 7.2% 5.9% 62.0% 9.1% 2015 TARGET 12%–16% 9%–12% 6%–7.5% 65%–75% 15% **ROIC is defined as adjusted OI divided by the sum of average debt and equity over a 5 quarter period 200 160 120 80 40 0 2007 2008 2009 2010 2011 2012 2013 SPECIALTY PLATFORM OPERATING INCOME* * 2010–2013 Operating Income is restated for the divestiture of the Resin Business 400 300 200 100 0 % P E R C E N TA G E POLYONE STOCK (POL) PERFORMANCE VERSUS S&P POL S&P MID CAP 400 CHEMICALS S&P 500 United States Securities and Exchange Commission Washington, DC 20549 FORM 10-K Í ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the fiscal year ended December 31, 2013 ‘ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to . Yes ‘ No Í Indicate by check mark whether the registrant: (1) has filed all reports required to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during the preceding 12 months (or for such shorter period that the registrant was required to file such reports), and (2) has been subject to such filing requirements for the past 90 days.

Yes ☐ No ☑ Indicate by check mark whether the registrant (1) has filed all reports required to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during the preceding 12 months (or for such shorter period that the registrant was required to file such reports), and (2) has been subject to such filing requirements for the past 90 days.

Yes ‘ No Í Indicate by check mark whether the registrant: (1) has filed all reports required to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during the preceding 12 months (or for such shorter period that the registrant was required to file such reports), and (2) has been subject to such filing requirements for the past 90 days.

Yes No Indicate by check mark whether the registrant: (1) has filed all reports required to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during the preceding 12 months (or for such shorter period that the registrant was required to file such reports), and (2) has been subject to such filing requirements for the past 90 days.