& Canada EMEA Asia Latin America 64% 36% Specialty Engineered Materials Color Additives and Inks 41% 36% 18% 5% 7% 7% 23% 19% 9% 16% 10% 5% 4% Defense Healthcare Packaging Consumer Building & Construction Industrial Transportation Energy Telecom Geography Segment Industry 2024 Financial Guidance $515 to $540 million Adjusted EBITDA $2.55 to $2.70 Adjusted EPS 4 Industry Sustainability Standards ESG Ratings Performance 1 2 4 87th 94th percentile Avient CDP Score: A- SUSTAINABILITY PERFORMANCE AND RECOGNITION A U G U S T 6 , 2 0 2 4 W E B C A S T P R E S E N TA T I O N 6 Q2 2024 HIGHLIGHTS • 5% organic sales growth supported by broad-based growth across all regions in both CAI and SEM segments • Growth stemmed from gaining share, winning new product specifications and restocking in certain end markets • Cost control and operational discipline expanded EBITDA margins by 100 bps • EPS exceeded guidance by $0.05 and increased 21% vs the prior year Adj. EBITDA $143 million +9% Net Sales $850 million +3% (+5% ex FX) Net Sales $850 million +3% (+5% ex FX) Adj. Q2 2023 ( T O TA L C O M PA N Y ) $824 $850 Q2 23 Q2 24 $131 $143 Q2 23 Q2 24 Sales Adjusted EBITDA (in millions) $0.63 $0.76 Q2 23 Q2 24 (in millions) Adjusted EBITDA Adjusted EPS 8 + 3% (+5% excluding FX) + 9% (+12% excluding FX) + 21% (+25% excluding FX) Sales 9 Q2 2 024 RESULTS – ORGA NI C SA LES BY REGION VS PY 9 US & Canada Latin America EMEA Asia +5% +4% +1% +19% Avient ex.

That’s Avient. 21,000+ CUSTOMERS >75% ARE CUSTOMIZED SOLUTIONS TO UNIQUE SPECIFICATIONS of sales 5 In July 2020, we completed the acquisition of the Clariant Color business, the largest acquisition in the 20-year history of our company. This innovation drives performance and is reflective of consistent, strategic investments in technology and people Clariant Color business acquired July 1, 2020 1 1 2 3 5 7 7 7 9 10 30 40 14 25 13 22 35 9 19 13 18 41 Current Additional share needed to reach 2025 target B R A N D O W N E R S C O M M I T T E D TO I N C R E A S I N G U S E O F R E C YC L E D M AT E R I A L S 14 Brand Owner 1 Brand Owner 3 Brand Owner 2 Brand Owner 7 Brand Owner 4 Brand Owner 10 Brand Owner 6 Brand Owner 11 Brand Owner 5 Brand Owner 8 Brand Owner 9 Brand Owner 12 Brand Owner 13 Percent recycled plastic used: (examples and not exhaustive) (1) (1) Latest year reported. Whether an additional line at an existing manufacturing plant, or a new facility in a growing region, we ramp-up quickly and cost-efficiently. 31 Capex / Revenue 2021E (%) AV I E N T I S A SS E T L I G H T Avient Specialty Formulators Other Chemical/Specialty Companies 2 3 1 2 3 3 3 4 3 3 4 5 5 5 6 9 A vi e n t A vi e n t (E xc l.

Density Impact Flexural Modulus (Dry) Tensile Strength (Dry) HDT Equilibrium Moisture — PKE-GF PA12-GF PA612-GF 5 4 3 2 1 0 Impact Shrink Flexural Modulus (Dry) Chemical Resistance Flexural Modulus (Cond.) CO2 Emission Factor — PKE-GF — PA6-GF — PA66-GF HDT Wear Density 5 4 3 2 1 0 Equilibrium Moisture 1: Poor 3: Good 5: Excellent

Avient Corporation 3 Simplified Drop Test • 65g steel ball • Dropped from 305mm • Onto 3.175mm thickness flat samples Materials Tested • Standard TPE 30 Shore A • TPU alloy 60 Shore A • Damping TPE 32 Shore A VDT reduces bounce Avient Corporation 4 SIMULATION & CALIBRATION E N 1 6 2 1 - 1 L E V E L 2 Image courtesy of Airobag TV https://www.youtube.com/c/AirobagTV/videos Simulation of Impact A weight dropped onto protective element in contact with rigid substrate https://www.youtube.com/c/AirobagTV/videos Avient Corporation 5 SIMULATION & CALIBRATION E N 1 6 2 1 - 1 L E V E L 2 REFINING THE DESIGN D E S I G N A N D M A T E R I A L C O M B I N A T I O N Avient Corporation 6 • A number of different shapes and designs are created and simulated to determine which one works best • Refining to meet EN standard • VDT TPEs can help reach compliance with EN1621-1 level 2 and EN1621-2 level 1 • Optimum protection can be achieved by combining industrial design and engineering Avient Corporation 7 VALIDATION P R O T O T Y P I N G W I T H 3 D P R I N T I N G 3D Printing Validation -15% -10% -5% 0% 5% 10% Density Tensile Strength // Tear resistance // Rebound resilience 2mm 3D Printed VDT vs Injection Molded VDT can be 3D printed for concept evaluation early in the design process SUMMARY Avient Corporation 8 • Enabled a new, compact design with a customized VDT TPE formulation • Improved user comfort and functionality • Fulfilled EN standards • Reduced number of prototyping tools required • Reduced time spent in product development by 40 percent, enabling faster commercialization of product

KEY CHARACTERISTICS • UL 94 V-2, V-0, 5VA ratings and elevated RTI ratings • GWFI (IEC 60695-11-10) up to 960°C • Comparative Tracking Index (CTI) PLC 0, 600V ratings • Injection molding and extrusion grades • Non-halogen grades available • Low dielectric performance with selected formulations • Good recyclability • Colorable MARKETS & APPLICATIONS Applications that require flame retardant performance including: • Transportation: Interior components, seat components, door panels, aircraft interiors, railway interiors, boat interiors • Construction & Building Materials: Cable insulation, pipes and fittings, insulation materials • Consumer – Appliance casings, housings, covers, fume hoods, battery packages, furniture • Industrial Equipment: Machine housings • Energy, Electrical & Electronic, E-Mobility: Battery frames, electrical housings, connectors • Telecommunication: Cable management • Packaging: Transportation of sensitive goods • Healthcare: Medical device housings and components PRODUCT BULLETIN MAXXAM FR FLAME RETARDANT POLYOLEFIN FORMULATIONS Non-halogenated Halogenated PP Homopolymer Copolymer Homopolymer Copolymer Unit Unfilled Glass Fiber Mineral Unfilled Glass Fiber Mineral Unfilled Glass Fiber Mineral Unfilled Glass Fiber Mineral Characteristic Talcum Talcum Talcum Talcum Reinforcement Mass-% 0 5–30 5–30 0 20–30 5-20 0 5–30 5–20 0 5–30 5–20 Colorable – ++ ++ + ++ ++ + + + + + + + Density g/cm3 0,9–1,08 1,28–1,37 0,98–1,55 0,92–1,06 1,25–1,35 0,95–1,28 0,94–1,04 1,3–1,55 1,01–1,42 0,96–1,01 0,94–1,58 0,95–1,46 Tensile Strength MPa 25–30 30–70 25–35 16–22 40–65 15–25 25-–35 30–70 25–35 20–24 20–55 -25 E-Modulus (Tensile) MPa 1600–2500 2500–8200 2500–4000 800–1200 2000–8000 1600–3000 1300–2000 3000–8900 1900–3500 1000–1400 1200–7500 1500–3000 Izod Impact 23°C notched % 2,0–4,5 3,5–7,5 2,5–4,5 5–40 2,5–18 2,5–6 2,5–4,5 3,5–6,0 3,0–7,0 4,0–40 2,5–16 2,5–10 Max.

Patterson President and Chief Executive Officer PolyOne Corporation Page 5 PolyOne Leadership Name Title Name Title Stephen D. Christopher Murphy Vice President, Research and Development Chief Innovation Officer PolyOne Corporation Page 22 2 lbs Plastic = 3 lbs aluminum or 8 lbs steel or 27 lbs glass 33% less material by weight than aluminum 75% less material by weight than steel 93% less material by weight than glass Requires 91% less energy to recycle a pound of plastic versus a pound of paper Source: SPI: Sustainability and the Plastics Industry Plastics: Key to Future Sustainable Development PolyOne Corporation Page 23 Decreasing Dependence on Fossil Fuels Globalizing and Localizing • Aging population • Longer life expectancy • Healthy living • Aging in place • Environmental consciousness • Alternative energy • Resource efficiency • Biotechnology • Global leader/local expert with customized solutions • Global OEMs seeking one standard of service everywhere • Efficiency focus • Reduced size/weight • Mass transit • Alternative materials • Electric vehicles Protecting the Environment Improving Health and Wellness Alignment with Megatrends PolyOne Corporation Page 24 Innovation Drives Earnings Growth $20 $53 2006 2013 Research & Development Spending ($ millions) Specialty Platform Vitality Index Progression* *Percentage of Specialty Platform revenue from products introduced in last five years 14.3% 30.7% 2006 2013 Specialty Platform Gross Margin % 19.5% 43.0% 2006 2013 PolyOne Corporation Page 25 Prototype Frame Opportunity Scale-up & Test Market Build Business Case Commercial Launch Phase 1 Phase 2 Phase 3 Phase 4 Phase 5 4 11 5 10 6 9 3 4 2 15 9 1 10 4 Breakthrough Platform Derivative A Rich Pipeline of Opportunity Number of Projects 25 14 19 17 18 93 Addressable Market ($ millions) TBD TBD $800 $450 $450 $1,700 PolyOne Corporation Page 26 Recent Innovations Aligned with Megatrends in Key End Markets and 2015 Goals Robert M. Patricia Hubbard Director Global Technology NEU™ View Medical Devices & Catheters 5) Sustainable Solutions Michael A.

PRODUCT BULLETIN PROPERTY COMPARISON TRILLIANT HC VS NYLON Density Impact Flexural Modulus (Dry) Tensile Strength (Dry) HDT Equilibrium Moisture — PKE-GF PA12-GF PA612-GF 5 4 3 2 1 0 Impact Shrink Flexural Modulus (Dry) Chemical Resistance Flexural Modulus (Cond.) CO2 Emission Factor — Trilliant HC — PA6-GF — PA66-GF HDT Wear Density 5 4 3 2 1 0 Equilibrium Moisture 1: Poor 3: Good 5: Excellent Density Impact Flexural Modulus (Dry) Tensile Strength (Dry) HDT Equilibrium Moisture — PKE-GF PA12-GF PA612-GF 5 4 3 2 1 0 Impact Shrink Flexural Modulus (Dry) Chemical Resistance Flexural Modulus (Cond.) CO2 Emission Factor — Trilliant HC — PA6-GF — PA66-GF HDT Wear Density 5 4 3 2 1 0 Equilibrium Moisture 1: Poor 3: Good 5: Excellent 1.844.4AVIENT www.avient.com Copyright © 2023, Avient Corporation.

VersaflexTM PF Versaflex PF VOC Versaflex PF VERSAFLEX PF VOC 39 LDPE / 13 Versaflex PF VERSAFLEX PF 39 LDPE / 13 Versaflex PF N / 2 5 m m N / 2 5 m m F = 25 ° C 7 I = 25 ° C 20 MD6741 / MD6700 VERSAFLEX PF TM +86 021 60284888 www.avient.com VERSAFLEX™ PF 1 CF6751 PP 2 2420K LDPE Versaflex™ PF MD6727 Versaflex™ PF MD6741 Versaflex™ CF 6751 Versaflex™ PF MD6649 Versaflex™ PF 9512 Versaflex™ CF 8888N-A Versaflex™ PF MD6666 Versaflex™ PF MD6748 Versaflex™ PF MD6700 Versaflex™ CF 9000 PP PVC Tg (°C) -26 -43 -30 -26 -5 1 -6 0 5 / (Shore A) 50 49 35 37 38 35 37 31 30 19 MFI (190°C, 2.16kg) (g/10min) / / / 15 5 15 20 3 5 27 MFI (230°C, 2.16kg) 8 20 8 / / / / / / / 1 LDPE 2420k2/LDPE 2420k/Versaflex™ =4.5/4.5/1 ; =50um (N/25mm) 25°C 20 1.3 1.8 7.9 2.5 2.2 2.7 3.3 3.0 3.7 4.3 75°C 7 5.7 2.9 7.2 3.1 4.0 4.3 4.3 5.5 5.6 / PMMA (N/25mm) 25°C 20 1.8 2.0 7.2 2.6 2.8 3.0 3.6 3.3 3.9 4.9 75°C 7 5.5 4.7 7.1 3.5 / 4.7 6.5 5.8 6.9 /

Newlin (5) Page 5 Welcome and Introduction Stephen D. Hanna consolidate • Cultures clash – commodity wins • Dependent on income derived from commodity joint ventures The First 6 Years • Globally organized along three strategic platforms • Non-core equity investment dispositions • Talent upgrades, discipline instilled throughout organization • New CEO hired to transform POL into specialty business �18 of 20 officers new • Implemented four pillar strategy • Nearly 50% of The Second 6 Years History of PolyOne – A Transformation • Focused on increasing volume, not profits • Heavily tied to cyclical markets 2000 2006 2012 The FormationThe Formation The TransformationThe Transformation The New PolyOneThe New PolyOne organization • Demonstrated ability to deliver • Nearly 50% of business operating income derived from Specialty Platform* • Specialty assets acquired *Pro forma for ColorMatrix acquisition Page 8 30% 50% 70% 90% $10 $12 $14 $16 $18 PolyOnePolyOne Stock Price S&P 500 (relative performance) Strategy and Execution Drive Results | | | | -50% -30% -10% 10% 30% $0 $2 $4 $6 $8 $10 2006 2007 2008 2009 2010 2011 2012 Page 9 Four Pillar Strategy The World’s Premier Provider of Specialized Polymer Materials, Services & Solutions Page 10 60% 80% 100% % o f O p e ra ti n g I n co m e * Old PolyOne Transformation 2012 Target “What We Said” Mix Shift Highlights Specialty Transformation Ahead of Schedule *Operating Income excludes Corporate Charges ** Pro Forma for the acquisition of ColorMatrix and divestiture of SunBelt 2% 34% 42% 50% >50% 0% 20% 40% 2005 2008 2011 2011** 2012 % o f O p e ra ti n g I n co m e * JV's PP&S Distribution Specialty Specialty OI $5M $46M $89M $117M “What We Said” Page 11 2007 2012 Target 2011 “Where we were” “What we said” “Where we are” 1) Operating Income % Specialty 3.2% 10% - 12% 8.9% PP&S 6.1% 8% - 10% 7.2% Pro forma ColorMatrix Proof of Performance Distribution 3.0% 4% - 5% 5.6% 2) Specialty Platform sss% of Operating Income 20% >50% 50% 3) Specialty Vitality Index 21% 35% - 40% 49% 4) ROIC* (pre-tax) 11% >15% 16% 5) Sales outside the US 37% >40% 40% *ROIC is defined as TTM adjusted OI divided by the sum of average debt and equity over a 5 quarter period Page 12 2011 Pro forma ColorMatrix 2015 Target “Where we are” “Where we expect to be” 1) Operating Income % Specialty 8.9% PP&S 7.2% 12 – 16% 9 – 12% Elevating our Expectations and Yours PP&S 7.2% Distribution 5.6% 2) Specialty Platform % of Operating Income 50% 3) ROIC* (after-tax) 10% 4) Adjusted Annual EPS Growth 3 yr CAGR = 71% 9 – 12% 6 – 7.5% 65 – 75% 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 Page 13 • Four pillar strategy, coupled with our ability to execute is driving results • Strong leadership team driving growth & executing • Innovation and services provide differentiation and How do we get there?

Maintain asset-light, 80% free cash flow conversion profile and be valued as a specialty formulator 5. Continue fostering our Great Place to Work® culture Strategic ObjectivesStrategic Objectives Long Term Growth Rates Growth DriversGrowth Drivers $340 $455 $790 $1,175 2016 2018 2020 2022 $51 $84 $212 $668 2016 2018 2020 2022 $108 $113 $231 $293 2016 2018 2020 2022 $265 $358 $726 $830 2016 2018 2020 2022 8-12% 10% 8-10% 5% Sustainable Solutions Composites Healthcare Asia/Emerging Regions Profitable GrowthProfitable Growth Great Place to WorkGreat Place to Work 5.4% 11.5% 16.2% 2006 2018 2022 EBITDA Margins $0.14 $2.67 $3.04 2006 2018 2022 Adjusted EPS 2022 data is pro forma for acquisition of Avient Protective Materials and Distribution divestiture TO P- T IE R S US TA I NA B I L I TY PE R F OR MA N C E A N D R EC O G NI T I ON Industry Sustainability Standards 90th percentile 84th ESG Ratings Performance 3 1 5 5 Innovation is the lifeblood of a specialty company. vehicles to be 100% electric by 2032 Where Avient Wins:  Lightweight panels that establish both strength and stiffness resulting in decreased energy usage, lower emissions  Long-lasting Color applications to resist UV exposure, temperature fluctuations and exceed the stylistic requirements of global automakers 19 $130 $530 Q2 FY $0.60 $2.40 Q2 FY 2023 GUIDANCE 20 Sales Adjusted EBITDA $845 $3,400 Q2 FY Adjusted EPS (in millions) (in millions) CA SH FLOW / LEV ER AGE 21 • Maintaining free cash flow and leverage guidance from February earnings call • IT investment to further integrate acquired businesses and capture operational efficiencies • Restructuring actions to streamline operations and improve profitability, primarily in Europe ($ millions) 2023E Cash Flow from Operating Activities 350$ Less: Run-Rate CapEx (110) CapEx for IT System Upgrade (25) CapEx for Restructuring (15) Total CapEx (150) Free Cash Flow 200$ Adjusted EBITDA 530$ Net Debt / Adjusted EBITDA 2.9x LONG-TERM REVENUE GROWTH DRI VERS Growth Drivers Long-Term Growth Rate Sustainable Solutions 8–12% Healthcare 8–10% Composites 10% Asia / LATAM 5% Other (GDP growth) 2–3% Avient 6.5% 22 Sustainable Solutions 32% Asia / LATAM 15% Composites 8% Healthcare 6% Other (GDP Growth) 39% • Virtual presentation to be held September 20, 2023 • The company will be conducting an investor-focused presentation around our sustainability solutions portfolio Avient Confidential 23 SUSTAINABILITY INVESTOR DAY 23 $340M $405M $455M $550M $790M $915M 2016 2017 2018 2019 2020PF** 2021 2022PF*** SUSTA INAB ILITY F OR A BETTER TOMOR ROW Revenue From Sustainable Solutions* 2016-2022 ($ in millions) Organic Future Growth Revenue Assumptions From Sustainable Solutions: 8 - 12% 24 *Avient Sustainable Solutions definitions aligned with FTC 2012 Guide for the Use of Environmental Marketing Claims (“Green Guides”) **2020 is Pro Forma to include full year of the Clariant Color business ***2022 is Pro Forma for the acquisition of Avient Protective Materials and the divestiture of Distribution $1,175M Lightweighting Eco-Conscious Recycle Solutions VOC Reduction Sustainable Infrastructure Human Health & Safety Reduced Energy Use Bio-polymers SUSTA INAB ILITY NEEDS BY M ARKET B&C • Eco-Conscious • Carbon footprint • Resource conservation Healthcare • Carbon footprint • Bio based content • Eco-Conscious Automotive • Light weighting • Recycled Content • VOC reduction Consumer • Recycle Solutions • Light weighting • Carbon Footprint Packaging • Recycle Solutions • Light weighting • Food waste reduction Common Theme: CO2 Emission Goals Increasing Single-Use Plastic Regulation 25 I NV ESTI NG I N INNOVATI ON S U S T A I N A B I L I T Y P O R T F O L I O 26 A P P E N D I X 29 RAW MATERIAL 2022 ANNUAL PURCHASES Performance Additives 16% Pigments 12% TiO2 10% Dyestuffs 2% Polyethylene 11% Nylon 6% Polypropylene 5% Styrenic Block Copolymer 5% Other Raw Materials 33% ~40% hydrocarbon based (Grey shaded materials are hydrocarbon based, includes portion of “Other Raw Materials”) Non-hydrocarbon based materials • Cost inflation decelerating, particularly for hydrocarbon-based raw materials 2022 pro forma results for the acquisition of Avient Protective Materials SEGMENT DATA U.S. & Canada 40% EMEA 37% Asia 18% Latin America 5% 2022 PRO FORMA SEGMENT, END MARKET AND GEOGRAPHY GEOGRAPHY REVENUESEGMENT FINANCIALS Consumer 20% Packaging 24% Industrial 15% Building and Construction 10% Telecommunications 4% Energy 4% Defense 6% END MARKET REVENUE $2,355M $402M $1,300M $272M Sales EBITDA Specialty Engineered Materials Color Additives and Inks $592M$3,653M (1) Transportation 9% Healthcare 8% 31 (1) Total company sales and adjusted EBITDA of $3,653M and $592M, respectively, include intercompany sales eliminations and corporate costs C O L O R , A D D I T I V E S & I N K S 2 0 2 2 R E V E N U E | $ 2 . 4 B I L L I O N US & Canada 34% EMEA 38% Asia 20% Latin America 8% END MARKET REGION 32 Packaging 34% Consumer 21% Healthcare 8% Industrial 15% Transportation 8% Building & Construction 11% Telecommunications 1% Energy 2% S P E C I A L T Y E N G I N E E R E D M A T E R I A L S 2 0 2 2 P R O F O R M A R E V E N U E | $ 1 . 3 B I L L I O N END MARKET US & Canada 52% EMEA 35% Asia 13% REGION 33 Packaging 5% Consumer 19% Healthcare 8%Industrial 16% Transportation 10% Telecommunications 10% Energy 9% Defense 15% Building & Construction 8% Packaging 32% Consumer 27% Healthcare 8% Industrial 14% Building & Construction 5% Telecommunications 3% Energy 1% Defense 1% Asia (18% of sales) Transportation 9% 2 0 2 2 P R O F O R M A AV I E N T R E G I O N A L S A L E S B Y E N D M A R K E T Packaging 27% Consumer 14% Healthcare 5% Industrial 17% Building & Construction 10% Energy 5% Defense 8% EMEA (37% of sales)Transportation 11% Packaging 13% Consumer 24% Healthcare 12% Industrial 15% Building & Construction 13% Energy 5% Defense 5% US & Canada (40% of sales) Transportation 7% Packaging 56% Consumer 23% Healthcare 4% Industrial 7% Building & Construction 4% Telecommunications 1% LATAM (5% of sales) Transportation 5% Telecommunications 3% Telecommunications 6% 34 PEER COMPARISONS AV I E N T I S A S SE T L I G H T Capex / Revenue 2023E (%) Avient Specialty Formulators Other Specialty / Chemical Companies Source: Peer data per Bloomberg as of May 31, 2023 Note: Avient reflects 2023 estimated revenue of $3,400 and estimated run-rate CAPEX of $110M. 36 3 2 3 3 4 4 3 3 4 5 5 6 8 9 A vi e n t K W R P P G F U L A V Y R P M F M C H U N C E H X L E C L A S H E M N S C L F R E E C A S H F LOW C O N V E R S I O N Source: Peer data per Bloomberg as of May 31, 2023 Note: Free cash flow conversion calculated as (Adjusted EBITDA – Capex) / Adjusted EBITDA.