HIGHLIGHTS from 2023: • Improve fuel economy • Reduce energy consumption • Reduce carbon footprint • Lessening environmental impact • Specialty solutions designed to replace traditional materials (e.g. metal, wood) at lower weight • Alternative solutions to reduce emittance of volatile organic compounds • Lightweighting design and solutions to reduce material usage • Avient Design Services to reduce weight or energy consumption REDUCE Consumer Transportation Building & Construction 20% LESS MATERIAL Lightweight Dashboards Hydrocerol™ Chemical Foaming Agents REDUCES VOCs SmartBatch™ FX for Body & Trim Paint Replacement 59% Air Cargo Nets Bio-Based Dyneema® Fiber SUSTAINABLE DESIGN Design for Lightweighting Avient Design Services LESS WEIGHT 60% EV Connectors Edgetek™ PKE Non-Halogen Flame Retardant Formulations LEARN MORE40% LED Lighting Components Therma-Tech™ Thermally Conductive Formulations LESS CO2 THAN NYLON LIGHTER THAN ALUMINUM LEARN MORE HOME | Contents | Message from the CEO | About Us | People | Products | Planet | Performance | Metrics | Index Sustainability Report | 2023 43Sustainability Report | 2023 43 https://www.avient.com/products/polymer-additives/foaming-agents/hydrocerol-chemical-foaming-agents https://www.avient.com/products/polymer-colorants/color-additive-combination-masterbatches/smartbatch-fx-paint-replacement-0 https://www.dyneema.com/sustainability/bio-based-dyneema-fiber https://www.avient.com/resource-center/services/avient-design https://www.avient.com/products/engineered-polymer-formulations/chemical-corrosion-resistant-formulations/edgetek-pke-polyketone-formulations https://www.avient.com/products/engineered-polymer-formulations/conductive-signal-radiation-shielding-formulations/therma-tech-thermally-conductive-formulations PRESERVE Avient’s portfolio of PRESERVE sustainable solutions are designed to preserve natural resources like water, protect human health and safety, and enable sustainable infrastructure.

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GHG Emissions (MT) Greenhouse Gas Emissions (MT Scope 1 & 2 GHG) Greenhouse Gas Emissions Intensity (MT 1 & 2 GHG/ MT Production) 60,000 120,000 180,000 240,000 300,000 2016 2017 2018* 2019* .45 .40 .35 .30 .25 .20 .15 .10 .05 .43 .35 .38 .34 Total Energy (GJ) Energy Intensity (MWh/MT Production) Total Energy 200,000 400,000 600,000 800,000 1,000,000 2016 2017 2018 2019 1.10 1.00 .90 .80 .70 .60 .99 .86 .91 .85 *Excludes divested PP&S segment and is consistent with the GHG Protocol Corporate Accounting and Reporting Standard. More recently, with the divestiture of the PP&S segment in 2019 and the acquisition of Clariant Masterbatch in 2020, we have fundamentally repositioned our portfolio to that of a true specialty enterprise—from which we can springboard to even greater heights in the future. EBITDA as % of Revenue 2019 Pro Forma Color, Additives & Inks 15.2% Specialty Engineered Materials 15.2% Distribution 6.4% Avient 11.1% 0% 60% 80% 0% 60% 80% 2005 2010 2015 2019 PF** $14M $117M $273M $500M Adjusted EBITDA* from Specialty Platform o f ju st E B IT D * Specialty EBITDA DistributionJV’s Performance Products & Solutions Specialty Applications * Adjusted EBITDA is EBITDA excluding corporate costs and special items ** 2019 Pro Forma for PP&S Divestiture and Clariant Color & Additive Masterbatch business acquisition with synergies 7% 46% 87% Building & Construction High Growth End Markets A Specialty Transformation Poised for Future Growth 2006 2019 PF** 2006 2019 PF** 38% 5% 22% 50% ** 2019 Pro Forma for PP&S Divestiture and Clariant Color & Additive Masterbatch business acquisition with synergies M ke t ve e a % o f To ta l 8% 10% 4% 18% 12%E M ke t ve e a % o f To ta l 66% Sustainability Report | 2019 78 *Avient Sustainable Solutions definitions aligned with FTC 2012 Guide for the Use of Environmental Marketing Claims (“Green Guides”) 2016 2017 2018 2019 Revenue from Sustainable Solutions* 2016–2019 Reduced Material Eco-conscious Bio-derived Content Reduced Energy Use Volatile Organic Compound Recyclability Renewable Energy Applications $275M $325M $355M $410M 14% Total Annual Growth 9% Organic Annual Growth Sustainable Products As highlighted in our Products section, Avient has a highly- technical and broad portfolio of materials solutions that help our customers—and our planet—be more sustainable.

GHG Emissions (MT) Greenhouse Gas Emissions (MT Scope 1 & 2 GHG) Greenhouse Gas Emissions Intensity (MT 1 & 2 GHG/ MT Production) 60,000 120,000 180,000 240,000 300,000 2016 2017 2018* 2019* .45 .40 .35 .30 .25 .20 .15 .10 .05 .43 .35 .38 .34 Total Energy (GJ) Energy Intensity (MWh/MT Production) Total Energy 200,000 400,000 600,000 800,000 1,000,000 2016 2017 2018 2019 1.10 1.00 .90 .80 .70 .60 .99 .86 .91 .85 *Excludes divested PP&S segment and is consistent with the GHG Protocol Corporate Accounting and Reporting Standard. More recently, with the divestiture of the PP&S segment in 2019 and the acquisition of Clariant Masterbatch in 2020, we have fundamentally repositioned our portfolio to that of a true specialty enterprise—from which we can springboard to even greater heights in the future. EBITDA as % of Revenue 2019 Pro Forma Color, Additives & Inks 15.2% Specialty Engineered Materials 15.2% Distribution 6.4% Avient 11.1% 0% 60% 80% 0% 60% 80% 2005 2010 2015 2019 PF** $14M $117M $273M $500M Adjusted EBITDA* from Specialty Platform o f ju st E B IT D * Specialty EBITDA DistributionJV’s Performance Products & Solutions Specialty Applications * Adjusted EBITDA is EBITDA excluding corporate costs and special items ** 2019 Pro Forma for PP&S Divestiture and Clariant Color & Additive Masterbatch business acquisition with synergies 7% 46% 87% Building & Construction High Growth End Markets A Specialty Transformation Poised for Future Growth 2006 2019 PF** 2006 2019 PF** 38% 5% 22% 50% ** 2019 Pro Forma for PP&S Divestiture and Clariant Color & Additive Masterbatch business acquisition with synergies M ke t ve e a % o f To ta l 8% 10% 4% 18% 12%E M ke t ve e a % o f To ta l 66% Sustainability Report | 2019 78 *Avient Sustainable Solutions definitions aligned with FTC 2012 Guide for the Use of Environmental Marketing Claims (“Green Guides”) 2016 2017 2018 2019 Revenue from Sustainable Solutions* 2016–2019 Reduced Material Eco-conscious Bio-derived Content Reduced Energy Use Volatile Organic Compound Recyclability Renewable Energy Applications $275M $325M $355M $410M 14% Total Annual Growth 9% Organic Annual Growth Sustainable Products As highlighted in our Products section, Avient has a highly- technical and broad portfolio of materials solutions that help our customers—and our planet—be more sustainable.

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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 % Color, Additives & Inks 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 P ER CE NT AG 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 2005 2007 2009 2011 2013 2015 OPERATING INCOME MIX SHIFT*^ 100 80 60 40 20 100+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 2009 2010 2011 2012 2013 2014 2015 ADJUSTED EARNINGS PER SHARE ◊† U. Our additive concentrates encompass a wide variety of performance and process enhancing characteristics and are commonly categorized by the function that they perform, such as UV stabilization, antimicrobial, anti- static, blowing or foaming, antioxidant, lubricant, and productivity enhancement. Our additive concentrates encompass a wide variety of performance and process enhancing characteristics and are commonly categorized by the function that they perform, such as UV stabilization, antimicrobial, anti- static, blowing or foaming, antioxidant, lubricant, and productivity enhancement.