Fiber-Line™ Coated Kevlar® Fiber reduces weight in Jet Turbine Containment Rings by 80% when compared to traditional steel applications. This weight reduction improves fuel efficiency and improves passenger safety as containment rings protect against blade failure. When a loss of containment is discovered, loose pellets are promptly contained and cleaned up.

Omnicolor colorants do not contain UV stabilizers; outdoor applications must be reviewed on a case-by- case basis. COLOR PVC PE/PP/PUR PS ABS ACETAL PBT NYLON PC/PES OM5001 OC5UFB Sky Blue 200+ 260 260+ 280 200+ 280 280 280 OM5009 OC5SAD Powder Blue 200+ 280+ 260+ 280+ 200+ 300 280+ 300 OM5011 OC5UFD Mid Blue 200+ 280+ 260+ 280+ 200+ 300 280+ 300 OM5027 UC5UFF Royal Blue 200+ 240 220 NS NS NS NS NS OM5034 OC5SAF Pale Blue 200+ 280+ 260+ 280+ 200+ 300 280+ 300 OM5065 OC5SAG Navy Blue 200+ 280+ 260+ 280+ 200+ 300 280+ 300 OM5179 OC5UFI Ultra Blue 200+ 280+ 260+ 280+ 200+ 300+ 280+ 300+ OM5485 OC5UFJ Pacific Blue 200+ 280+ 260+ 280+ 200+ 300 280+ 300 OM5982 OC5SAI Baby Blue 200+ 260+ 260+ 280+ 200+ 300 280+ 300 OM55094 OC4UFB Purple 200+ 260 240 240 200+ NS NS NS OM55157 OC5UFS Ice Blue 200+ 280+ 260+ 280+ 200+ 300 280+ 300 OM55160 OC5SAH Midnight Blue # *200+ NS 260 260 NS 300 NS 300 OM55162 OC5UFM Cornflower Blue 200+ 280+ 260+ 280+ 200+ 300 280+ 300 OM55302 N/A African Violet 200+ 280 260 260 200+ 250+ NS NS OM55484 N/A Mistral 200+ 280+ 260+ 280+ 200+ 265 280+ 300+ OM55497 N/A Lavender 200+ 280+ 260+ 280+ 200+ 265 280+ 300+ OM55500 N/A Bluebell 200+ 280+ 260+ 280+ 200+ 265 280+ 300+ OM55502 N/A Lilac 200+ 240 240 NS 200+ NS NS NS OM6037 N/A Aqua 200+ 280+ 260+ 280+ 200+ 265 280+ 300+ OM6969 OC6UFL Alpine Green 200+ 280 260 260 200+ 280 NS 280 OM6985 OC6SAK Spearmint Green 200+ 280+ 260+ 280+ 200+ 300 280+ 300 OM6994 OC6UFN Leaf Green 200 240 220 NS NS NS NS NS OM66070 OC6UFC Fern Green 200+ 280 260 260 200+ 280 NS 280 OM66072 OC6SAD Springtime 200+ 280 260 260 200+ 280 NS 280 OM66075 OC6SAE Racing Green 200+ 280 260 260 200+ 280+ NS 280+ OM66083 OC6SAF Fresh Green 200+ 280 260 260 200+ 280 NS 280 OM66087 OC6UFG Sage Green 200+ 280 260 260 200+ 280 NS 280 OM66088 OC5UFQ Marine Blue 200+ 280 260 260 200 280 NS 280 OM66099 OC6SAG Lime Green *200+ NS 260 250 NS 280+ NS 280+ OM66100 OC6SAH Olive Green 200+ 280+ 260+ 260+ 200+ 300+ 280+ 300+ OM66159 N/A Pod Green 200 240 220 NS NS NS NS NS OM66161 N/A Ocean Green 200+ 280 260+ 260+ 200+ 265 280+ 300 OM66301 N/A Dewdrop 200+ 260+ 260+ NS 200+ NS NS 280+ OM66303 N/A Grass Green 200+ 260+ 260+ NS 200+ NS NS 280 OM66306 N/A Lettuce Green 200+ 260+ 260+ NS 200+ NS NS 280 OM66307 N/A Apple Green 200+ 260+ 260+ NS 200+ NS NS 280 OM7002 OC7SAE Light Grey 200+ 280+ 260+ 280+ 200+ 300+ 280+ 300+ OM7020 OC7UFD Dark Grey 200+ 280+ 260+ 280+ 200+ 300+ 280+ 300+ OM7021 OC7SAF Ash Grey 200+ 280+ 260+ 280+ 200+ 300+ 280+ 300+ OM7053 OC7UFF Mid Grey 200+ 280+ 260+ 280+ 200+ 300+ 280+ 300+ OM7378 OC7UFG Dove Grey 200+ 280+ 260+ 280+ 200+ 300+ 280+ 300+ OM7759 OC7UFJ Soft Grey 200+ 280+ 260+ 280+ 200+ 300+ 280+ 300+ OM7994 OC9SAG Graphite 200+ 280+ 260+ 280+ 200+ 300+ 280+ 300+ OM7996 OC7SAH Moonstone 200+ 280+ 260+ 280+ 200+ 300+ 280+ 300+ OM7999 OC7UFN Pebble ** 200+ 280+ 260+ 280+ 200+ 300+ 280+ 300+ OM77000 OC7SAG Cloud Grey 200+ 280+ 260+ 280+ 200+ 300+ 280+ 300+ OM77007 OC9SAE Mink ** 200+ 280+ 260+ 280+ 200+ 300+ 280+ 300+ OM77013 OC5SSA Dusk 200+ 280+ 260+ 280+ 200+ 265 280+ 300 OM77140 N/A Putty 200+ 280 260+ 260+ 200+ 265 280+ 280 + Potential use at temperatures above those indicated NS Not suitable for use in polymer indicated # Contains dyestuff which will migrate from PE/PP and all other polyolefins OMNICOLOR™ PROCESSING TEMPERATURES RECOMMENDED MAXIMUM PROCESSING TEMPERATURES FOR OMNICOLOR IN SELECTED POLYMERS IN °C UK COLOR NO. Avient makes no representations, guarantees, or warranties of any kind with respect to the information contained in this document about its accuracy, suitability for particular applications, or the results obtained or obtainable using the information.

Yes No Indicate by check mark if disclosure of delinquent filers pursuant to Item 405 of Regulation S-K is not contained herein, and will not be contained, to the best of registrant’s knowledge, in definitive proxy or information statements incorporated by reference in Part III of this Form 10-K or any amendment to this Form 10-K. Any future refinancing of the revolving credit facility or other debt may contain similar restrictive covenants. The following discussion contains forward-looking statements that reflect our plans, estimates and beliefs.

September 20, 2023 (NYSE: AVNT)Avient Sustainability Day AGENDA WELCOME Bob Patterson INTRODUCTION Jamie Beggs SUSTAINABILITY STRATEGY Walter Ripple SUSTAINABLE SOLUTIONS Michael Garratt, Chris Pederson, Woon Keat Moh SUMMARY Jamie Beggs WRAP UP AND Q+A Bob Patterson Avient Corporation 2 Forward-Looking Statements Certain statements contained in or incorporated by reference into this presentation constitute “forward-looking statements” within the meaning of the Private Securities Litigation Reform Act of 1995. White House Administration GOVERNMENT INFLUENCE CREATES OPPORTUNITIES Avient Corporation 32 175 Countries support the UN Plastics Treaty to help manage plastics pollution £210 U.K. tax per tonne on products containing less than 30% recycle content (U.K. Chantal Nestor-Saury, Product Development Manager Avient Corporation 48 Brand Commitment: Percent Recycled Plastic Used Demand by Feedstock Type 39% 29% 37% 16% 25% 11% 11% 6% 19% 7% 0% 10% 20% 30% 40% 50% Brand 1 Brand 2 Brand 3 Brand 4 Brand 5 Brand 6 Brand 7 Brand 8 Brand 9 Brand 10 Progress through 2022 Gap to reach 2025 targets Source: Ellen MacArthur Foundation 2022 2020 2030 12% CAGR Recycled Plastics Virgin Plastics3% CAGR RENEW – TAKEAWAY Demand for Recycled Content Drives Growth Projections Examples Covered Today 55% Other Applications 45% 2022 $340M Source: McKinsey HOW WE ENABLE SUSTAINABILITY Reduce Chris Pederson Senior Vice President, President of Specialty Engineered Materials Avient Corporation 49 REDUCE Avient Corporation 50 KEY CUSTOMER CHALLENGES: • Improving Fuel Economy - Incorporating innovative lighter-weight alternative materials as a cost-effective way to reduce fuel consumption • Reducing Energy Consumption and Dependence on Fossil Fuels - Negative public perceptions of fossil fuels are challenging companies to utilize alternative energy sources and also to reduce overall demand (consumption) • Reducing Carbon Footprint - Companies are seeking assistance from their suppliers to address the ever-increasing pressure to reduce their carbon footprint • Lessening Environmental Impact - Manufacturers are looking to reduce dependence on processes with high environmental impact such as the release of Volatile Organic Compounds (VOCs) during painting Solutions to reduce weight and energy consumption Avient Corporation 51 Lightweight Dashboards Hydrocerol™ Chemical Foaming Agents • Reduces part weight • No impact on performance • Highly cost effective 20% LESS MATERIAL Automotive / EVs 2022 Revenue: $46M Body + Trim SmartBatch™ Paint Replacement • Reduces emission of volatile organic compounds (VOCs) REDUCES VOCs Protective Film Versaflex™ Protective Film • Protects new cars from damage during shipping • High-tack eliminates solvent containing adhesives Avient Corporation 52 LED Lighting Components ThermaTech™ Thermally Conductive Formulations • Reduces weight vs. aluminum • Removes heat – extends LED life • Will not corrode 40% LIGHTER THAN ALUMINUM Automotive / EVs 2022 Revenue: $3M REDUCES FUEL CONSUMPTION Running Boards, Side Steps Complēt™ Long Fiber Reinforced Structural Thermoplastics • High strength-to-weight • Replaces steel/aluminum • Excellent load carrying and fatigue resistance Avient Corporation 53 Battery Frame Maxxam™ Polyolefin Formulations • Critical stiffness and rigidity • Chemical and thermal performance • Replaces a heavier, aluminum frame 60% LIGHTER THAN ALUMINUM Design for Lightweighting Avient Design Services • Comprehensive design for sustainability capabilities • Materials agnostic • 10% reduction in weight increases range by 14% SUSTAINABLE DESIGN Automotive / EVs 2022 Revenue: $4M EV Battery Cooling System Versaflex™ Thermoplastic Elastomers • Thermal management • Chemically resistant • More efficient and longer life battery EXTENDS BATTERY LIFE Avient Corporation 54 EV Connectors Edgetek™ PKE Non-halogen flame retardant Formulations • Provides reduced carbon footprint alternative to traditional materials (Nylon) 66% LESS CO2 THAN NYLONCharging Cable Infrastructure ECCOH™ Wire and Cable Formulations • Low smoke, zero halogen • Flame resistance exceeds EVM1/EVL2 requirements ZERO HALOGEN Automotive / EVs 2022 Revenue: $2M Avient Corporation 55 Trailer Flooring Polystrand™ R Recycled PET Composite Tapes • Minimum 95% post-consumer recycle content • Improved carbon footprint without sacrificing performance 95% RECYCLED PET Aerodynamic Side Shield Polystrand™ Thermoplastic Composite Laminates • Can be post-formed • Reduces fuel consumption • High impact and fatigue resistance 60% LIGHTER Commercial Transportation, Aerospace 2022 Revenue: $8M Rail Car Doors Glasforms™ Composite Panels • Replaces steel • Will not corrode • Reduces weight LIGHT & DURABLE Air Cargo Nets Bio-based Dyneema® Fiber • Reduces fuel consumption • Extends product life from 3 to 5 years 59% LESS WEIGHT Arm Rests & Seat Frames Complēt™ Long Fiber Composites • Replaces steel • High strength-to-weight ratio LIGHT & STRONG Commercial Transportation, Aerospace 2022 Revenue: $8M Air Cargo Containers Polystrand™ Composite Sandwich Panels • Lighter and stronger than aluminum • Reduces fuel consumption 95% RECYCLE CONTENT Avient Corporation 56 Avient Corporation 57 Aquaculture/ Fishing Nets Dyneema® Fishing Net Fibers • High bite resistance – lowers maintenance costs and fish loss • Lighter weight reduces fuel consumption – allows for larger net sizes 60% LIGHTER THAN NYLON/ POLYESTER 70% LIGHTER THAN STEEL Lifting Slings Dyneema® Fiber • Facilitates heavy lift in harsh environments • Accredited by DNV GL, ABS, Bureau Veritas Mooring Lines Dyneema® Mooring Rope Fibers • Able to handle heavy loads common to modern shipping • Improves handling • Reduces dock worker injuries 2x SERVICE LIFE Marine Infrastructure 2022 Revenue: $41M Solar Power Station UV Solutions Smartbatch™ Combination Colorants • Protects solar power panels from UV weathering and outdoor exposure • Meets critical performance standards 10% ENERGY SAVINGS (VS.

Any future refinancing of our senior secured revolving credit facility or other debt may contain similar restrictive covenants. The following discussion contains forward-looking statements that reflect our plans, estimates and beliefs. The majority of the Company’s sales agreements contain performance obligations satisfied at a point in time when control is transferred to the customer.

The following discussion contains forward-looking statements that reflect our plans, estimates and beliefs. The term loan agreement contains customary covenants including various financial covenants. The term loan agreement contains customary covenants including various financial covenants.

Buyer acknowledges that Seller has furnished to Buyer Material Safety Data sheets, which include warnings together with safety and health information concerning the Product and/or the containers for such Product. 10. O Comprador reconhece que o Vendedor forneceu ao Comprador Material de Segurança, o qual inclui avisos juntamente com informações sobre segurança e saúde relativas ao Produto e/ou aos containers de tal Produto. No modification or addition to this contract shall occur by the acknowledgment or acceptance by Seller of a purchase order, acknowledgment, release or other form submitted by Buyer containing additional or different terms or conditions, and Seller hereby gives Buyer notice of the rejection of such additional terms and conditions.

In addition to the information contained in this document, which is focused on quality systems and management, Avient has prepared a separate summary of Avient’s Environmental, Social and Governance (ESG) policies and practices that is available upon request. While we believe the information contained in this document should be responsive to most inquiries, if you have questions not answered by this document you should reach out to your sales representative, who is your primary contact, and can forward your request to an appropriate person.

sa=i&rct=j&q=&esrc=s&frm=1&source=images&cd=&cad=rja&uact=8&ved=0CAcQjRw&url=http://www.mullerquaker.com/products/greek100/greek100-peach-and-passion-fruit&ei=-acYVZq7EIqwyASDjYL4CA&bvm=bv.89381419,d.cWc&psig=AFQjCNGNCQY1_dCN2RPLzxtap_Pu0omTXQ&ust=1427765484498432 POLYONE CORPORATION 22 2016 Revenue: $0.7 Billion At a Glance: Performance Products & Solutions 2016 Revenue by Industry Expanding Profits 5.5% 6.9% 3.8% 3.6% 5.5% 4.3% 6.3% 7.2% 7.7% 8.3% 12-14% 2006 2007 2008 2009 2010 2011 2012 2013 2014 2015 2016 2020 Operating Income % of Sales Platinum Vision 11.1% B & C 30% Transportation 18% W & C 16% Industrial 16% Appliance 6% Consumer 5% Packaging 5% E & E 3% Healthcare 1% United States 78% Canada 16% Latin America 4% Asia 2% Key Applications POLYONE CORPORATION 23 2016 Revenue: $1.1 Billion At a Glance: Distribution Key Suppliers ROIC Expanding Profits 2.6% 3.0% 3.5% 4.0% 4.6% 5.6% 6.4% 5.9% 6.1% 6.6% 6.5-7.5% 6.4% 2006 2007 2008 2009 2010 2011 2012 2013 2014 2015 2016 2020 Operating Income % of Sales Platinum Vision 15% 51% 2006 2016 Transportation 24% Healthcare 22% Industrial 18% Consumer 15% Appliance 6% E & E 5% B & C 4% Packaging 4% W & C 2% http://www.polyone.com/Pages/VariationRoot.aspx 24 POLYONE CORPORATION Application Examples POLYONE CORPORATION 25 Luxury Packaging with Gravitech Density Modified Polymers  Impart weight, sound and metallic finish to caps and closures for cosmetics and spirits applications  Elevate quality and prestige perceptions among high-end consumers  Eliminate time and cost associated with secondary operations and assembly POLYONE CORPORATION 26  Eliminate costs by increasing pigment density  Enhance color performance without altering form and formulation  Increase design capabilities by reducing weight and layer thickness Optimize Color Usage with OnColor Super Concentrates POLYONE CORPORATION 27  Inhibit microbial growth on polymer surface  Enhance value or products and devices  Highly versatile concentrate with the ability to be incorporated into a wide variety of products Combat Bacteria Formation with WithStand Antimicrobial Technology POLYONE CORPORATION 28 Medical Device Housings with Chemically Resistant Engineered Polymers  Durable, long-lasting products stand up to the most aggressive disinfectants  Minimize environmental stress cracking and discoloration  One of the broadest medically approved polymer and colorant portfolios POLYONE CORPORATION 29 Color & Design Services  Greater control of color development and supply chain  Work across entire design process from concept to commercialization  Inspire creativity in the use of polymer materials, colors and effects  Innovative brand differentiation  Faster development timelines POLYONE CORPORATION 30 Outdoor Applications  Leading provider of high performance specialty materials for the recreational and sports & leisure industry  Well positioned across all segments to address market needs  Metal to Polymer Conversion  Lightweighting  Thermal Management  Impact Performance Source: Outdoor Industry Association POLYONE CORPORATION 31 Fiber Colorants Solutions for clothing, apparel, footwear, automotive & sporting goods  ColorMatrix Fiber Colorant Solutions  Proprietary advanced liquid color formulations and equipment enable greater efficiency and productivity  Eliminates aqueous dyeing and its associated wastewater treatment  Solid Color Concentrates  Extrusion-spun fibers colored via solid masterbatch POLYONE CORPORATION 32 High-Barrier Packaging Containers  Capability to extrude up to 13 layers  Strong oxygen and moisture vapor transmission protection  Can be made symmetrical or asymmetrical to meet customized needs of broad variety of applications  Barrier protection and superior sensory properties 1 Reconciliation of Non-GAAP Financial Measures (Unaudited) (Dollars in millions, except per share data) Senior management uses comparisons of adjusted net income attributable to PolyOne common shareholders, adjusted earnings per share (EPS) attributable to PolyOne common shareholders and operating income before special items to assess performance and allocate resources because senior management believes that these measures are useful in understanding current profitability levels and that current levels may serve as a base for future performance. 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 Optimize Color Usage�with OnColor Super Concentrates Combat Bacteria Formation�with WithStand Antimicrobial Technology Medical Device Housings�with Chemically Resistant Engineered Polymers Color & Design Services Outdoor Applications Fiber Colorants�Solutions for clothing, apparel, footwear, automotive & sporting goods High-Barrier Packaging Containers Investor Presentation - January 2017 r14 Investor Presentation - January 2017

NO BPA: Most high-performance thermoplastics do not contain BPA (Bisphenol A), which is associated with concerns about possible health effects. » » » » CRITICAL DIFFERENCES What Makes High-Performance Thermoplastics Stand Out? Avient makes no representations, guarantees, or warranties of any kind with respect to the information contained in this document about its accuracy, suitability for particular applications, or the results obtained or obtainable using the information.