AUTOMOTIVE OEM H E A T S H I E L D C O M P O N E N T F O R L E D H E A D L A M P • The material needed to solve a hot spot issue • A PA based grade • High thermal conductivity - 20 W/mK • Electrically conductive • Improved the parts long-term outdoor performance • Improved processability compared to high temperature plastics, reducing tooling costs • Reduced part weight by 37% than the previous metal part, providing the customer with a more economical solution Customized PA based grade KEY REQUIREMENTS WHY AVIENT?

SECURITY EQUIPMENT MANUFACTURER B O D Y S C A N N E R • Replace PMMA based radome material • Consistent dielectric performance across large sheet/surface area (4mm thick, 2m high) • Ultra low losses • No defects across full surface area • High resolution imaging to show small illegal objects • Formulated a custom material to match customer requirements • Reduced dielectric loss to 0.0009 • Improved image quality of body scanner with uniform dielectric performance and exceptionally low losses • Enabled scan time of 2 seconds and person throughput of 400 persons per hour, compared to 100 person throughput of conventional devices PREPERM™ PPE 260 Formulation KEY REQUIREMENTS WHY AVIENT?

PHONE CASE BRAND C L E A R P H O N E C A S E S • Optically clear • Non-yellowing • Good stain resistance • Bondable to PC • Formulated a custom solution to enhance stain resistance and tensile strength • Collaborated on application and technical services to help ensure end product maintained optical clarity when texture was added • Provided manufacturing support to reduce scrap • Coordinated across multiple regions for supply continuity and technical support to serve customer’s global needs Versaflex™ CE 3320-80 TPE KEY REQUIREMENTS WHY AVIENT?

SMALL APPLIANCE OEM C O F F E E M A C H I N E S E A L • Soft durometers • Good bonding to ABS • Good flowability for easy processing • Excellent sealing property • Formulated a 30 Shore A TPE with excellent peel force performance to meet the sealing requirements • Offered a short lead time and on-site technical service to speed up the time to market • Provided fast global collaboration between regions, supporting the brand’s design team in Europe and molders in Asia Custom VersaflexTM Formulation KEY REQUIREMENTS WHY AVIENT?

CABLE GUARD C O M P O U N D A R C H E R Y B O W • Consistent quality that withstands extreme outdoor conditions • Dimensional stability to improve durability and extend product life • Lightweight material for easy customer handling • Strong, long-lasting quality • Maintained stiffness and straightness while upholding performance and aesthetic specifications • Provided dimensional stability necessary for outdoor applications • High strength-to-weight ratio enabled high performance without adding significant weight Glasforms™ Pultruded Carbon Fiber Rod KEY REQUIREMENTS WHY AVIENT?

S U R G I C A L T O R Q U E W R E N C H SURGICAL DEVICE MANUFACTURER • Excellent wear resistance and lubricity • Easy-to-mold • Good chemical resistance, excellent disinfection performance • Dimensional stability • Formulated a specialty thermoplastic that retained physical properties and dimensional stability under various testing conditions • Provided a custom solution faster than competitors to support accelerated speed to market Edgetek™ Engineered Polymer Formulation KEY REQUIREMENTS WHY AVIENT?

EQUIPMENT MANUFACTURER K I T C H E N E X T R A C T O R H O O D S • Halogen free to industry standards • Lower density • Good impact properties • Easy to process • Good cost/performance • Provided a non-halogenated solution while increasing the performance of the formerly used halogenated grade • Supported the project with various expertise in design (Avient Design), regulatory and technical support • Helped to reduce the system cost and make our customer more competitive in the market Maxxam™ FR Flame Retardant Polyolefin Formulations – NHFR Series KEY REQUIREMENTS WHY AVIENT?

OUTDOOR HIGH PERFORMANCE MANUFACTURER M A R I N E A C C E S S O R I E S • High strength • High UV resistance • Structural stiffness • Provided multiple nylon grades for several marine accessories • Complemented customer expertise with application development insight and technical support in material selection • Eliminated supply concerns by serving as a single, stable source for numerous materials Nymax™ PIR Post-Industrial Recycled Nylon Formulations KEY REQUIREMENTS WHY AVIENT?

INDUSTRY BULLETIN STANDARD UNITS ONFLEX LO 7120-45N Volatile Organic Compounds VDA 278 ug/g(ppm) 41 Fogging VDA 278 ug/g(ppm) 521 Odor • Control • Dry conditions • Wet conditions SAE J1351 (15) 1-10 Scale 1 2 1 Compression Set (23°C) • 22 hours • 70 hours ASTM D395 % 14.4 14.6 Capillary Viscosity • 1341/s • 11170/s ASTM D3835 Pa*s 35 7 HVAC SYSTEMS OnFlex™ LO • Features: low VOC/FOG, low odor, good compression set, easy processing, overmolds to polypropylene • Example applications: seals and flaps in heating, ventilation and air conditioning systems CHARACTERISTICS ONFLEX™ LO ONFLEX™ AF TPE GENERAL PURPOSE TPV TPO Volatile Organic Compounds (VDA 278) Very Low Moderate Moderate Moderate Very Low Fogging (VDA 278 & DIN 75201) Very Low Moderate Moderate High Very Low Odor (VDA 270 Requirement ≤3.0) ≤3.0 ≤3.0 >3 >3 ≤3.0 Gloss Level Low Low Low Very Low High Tactile Feel Grippy Grippy Grippy Grippy Waxy Pre-Drying Required No No No Yes No Raw Material Costs $$ $$ $$ $$$ $ Compression Set @ RT Good Good Good Excellent N/A Compression Set @ ≥70°C Moderate Moderate Moderate Good N/A UV Resistance Good Excellent Good Good Good Weatherability Good Excellent Good Good Good Hardness Range Low to High Low to High Low to High Low to High High Density (g/ml) 1.15 0.99 0.90–1.20 0.95–0.98 0.90–1.20 GENERAL CHARACTERISTICS COMPARING TPE, TPV, TPO Grades shown on both pages are representative of solutions manufactured in North America, more grades available globally. INTERIORS/EXTERIORS TEMP STANDARD UNITS ONFLEX AF 7210-40B ONFLEX AF 7210-50B ONFLEX AF 7210-60B ONFLEX AF 7210-70B ONFLEX AF 7210-80B QUV Exposure • 1000 Hrs(0.68 W/m2 @ 340nm) • 2000 Hrs(0.68 W/m2 @ 340nm) 45°C ΔE 0.49 0.38 0.42 0.48 0.21 0.85 0.22 0.14 0.32 0.24 Xenon-Arc Exposure • 1000 Hrs(0.35 W/m2 @ 340nm) 63°C ΔE 0.63 0.84 0.34 — 0.58 Capillary Viscosity • 1341/s • 11170/s ASTM D3835 Pa*s 60 11.4 79 15 65 13 48 13.7 73 16 Ozone Resistance ASTM D1149(16) B Visual No cracks No cracks No cracks No cracks No cracks Low Temperature Brittleness ISO 812 B °C -63 -62 -62 -62 -62 OnFlex™ AF • Features: long-term sealing performance, reduced noise and vibration, grippy feel, low gloss, low odor, excellent UV resistance and weatherability, easy processability, overmolds to polypropylene • Example applications: trays, door pockets, fasteners, clips, roof rack pads, roof and door trim, and window encapsulations The need to innovate is virtually endless.

Avient corporation first quarter 2023 results AVIENT CORPORATION I N V E S T O R P R E S E N T A T I O N (NYSE: AVNT) F E B R UA RY 2 0 2 4 DISCLAIMER 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. Continue fostering our Great Place to Work® culture Strategic Objectives Long Term Growth Rates Growth Drivers $340 $455 $790 $1,135 2016 2018 2020 2023 $51 $84 $212 $645 2016 2018 2020 2023 $108 $113 $231 $230 2016 2018 2020 2023 $265 $358 $726 $725 2016 2018 2020 2023 8-12% 8-10% 8-10% 5% Sustainable Solutions Composites Healthcare Asia/Emerging Regions Profitable Growth Great Place to Work 5.4% 10.9% 16.0% 2006 2014 2023 EBITDA Margins $0.14 $1.93 $2.36 2006 2014 2023 Adjusted EPS TOP-TIER SUSTAINABILITY PERFORMANCE AND RECOGNITION Industry Sustainability Standards ESG Ratings Performance 1 2 4 87th 94th percentile 5 Avient CDP Score: A- FE BRUARY 14 , 2024 W E BCAS T P RE S E N TAT I O N DR. PY (TOTAL COMPANY) $790 $719 2022 2023 $107 $114 2022 2023 Sales Adjusted EBITDA (in millions) $0.42 $0.52 2022 2023 Adjusted EPS (in millions) - 9% + 7% + 24% Sales Adjusted EBITDA Adjusted EPS 15 Q4 2023 SEGMENT PERFORMANCE 16 CAI $491 $459 Sales (in millions) $70 $84 EBITDA SEM $301 $260 Sales $55 $49 EBITDA - 7% - 14%+20% - 11% 2022 2023 (in millions) Q4 EBITDA BRIDGE (TOTAL COMPANY) 17 $ millions CAI: Price / Mix 11 Deflation 14 SEM: Price / Mix 4 Deflation 9 Net Price Benefit 38 Cost Reductions 13 Wage Inflation (8) Other (2) Q4 2023 $114 Adjusted EBITDA Q4 2022 $ 107 Demand (34) • Demand was down, but less than in previous quarters, due to slowing pace of destocking • Positive net price benefit: o CAI – Pricing flat with favorable mix from uptick in packaging and consumer end markets and raw material deflation o SEM - Pricing flat with favorable mix from Composites and raw material deflation • Cost reductions primarily driven by reduced administrative costs and cost synergies 2024 G U I DAN CE 2024 GUIDANCE Full Year 2024 Guidance Adjusted EBITDA $505 to $535 million Adjusted EPS $2.40 to $2.65 Interest Expense $105 to $110 million Adjusted Effective Tax Rate 23% to 25% Capital Expenditures ~$140 million 19 Q1 Adjusted EPS of $0.68 AP P E N DI X 21 Performance Additives 15% Pigments 13% TiO2 9% Dyestuffs 2% Polyethylene 10%Nylon 5% Polypropylene 4% Styrenic Block Copolymer 4% Other Raw Materials 38% ~40% hydrocarbon based (Grey shaded materials are hydrocarbon based, includes portion of “Other Raw Materials”) Non-hydrocarbon based materials RAW MATERIAL BASKET SEGMENT DATA U.S. & Canada 41% EMEA 36% Asia 18% Latin America 5% 2023 SEGMENT, END MARKET AND GEOGRAPHY GEOGRAPHY REVENUESEGMENT FINANCIALS Consumer 19% Packaging 23%Industrial 16% Building and Construction 9% Telecommunications 4% Energy 5% Defense 7% END MARKET REVENUE $2,007M $358M $1,138M $224M Sales EBITDA Specialty Engineered Materials Color Additives and Inks $502M$3,143M (1) Transportation 10% Healthcare 7% 23 (1) Total company sales and adjusted EBITDA of $3,143M and $502M, respectively, include intercompany sales eliminations and corporate costs 2023 REVENUE | $2 .0 BILLION US & Canada 34% EMEA 37% Asia 21% Latin America 8% END MARKET REGION 24 Packaging 34% Consumer 21% Healthcare 8% Industrial 15% Transportation 9% Building & Construction 10% Telecommunications 1% Energy 2% COLOR, ADDITIVES & INKS 2023 REVENUE | $1 .1 BILLION US & Canada 52% EMEA 35% Asia 13% 25 Packaging 5% Consumer 16% Healthcare 6%Industrial 16% Transportation 12% Telecommunications 9% Energy 10% Defense 18% Building & Construction 8% END MARKET REGION SPECIALTY ENGINEERED MATERIALS Packaging 32% Consumer 26% Healthcare 9% Industrial 13% Building & Construction 6% Telecommunications 2% Energy 2% Defense 1% Asia (18% of sales) Transportation 9% 2023 AVIENT REGIONAL SALES Packaging 25% Consumer 13% Healthcare 5% Industrial 18% Building & Construction 9% Energy 5% Defense 8% EMEA (36% of sales)Transportation 13% Packaging 13% Consumer 22% Healthcare 10% Industrial 16% Building & Construction 12% Energy 6% Defense 8% US & Canada (41% of sales) Transportation 9% Packaging 59% Consumer 22% Healthcare 2% Industrial 8% Building & Construction 4% LATAM (5% of sales) Transportation 5% Telecommunications 4% Telecommunications 4% 26 BY END MARKET Reconciliation of Non-GAAP Financial Measures (Unaudited) (Dollars in millions, except for per share data) Senior management uses comparisons of adjusted net income from continuing operations attributable to Avient shareholders and diluted adjusted earnings per share (EPS) from continuing operations attributable to Avient shareholders, excluding special items, to assess performance and facilitate comparability of results.