& Canada 40% 38% 17% Q1 2023 SEGMENT, END MARKET AND GEOGRAPHY GEOGRAPHY REVENUESEGMENT FINANCIALS 18% 23% Building and 6%Telecommunications END MARKET REVENUE (1) Total company sales and adjusted EBITDA of $846M and $134M, respectively, include intercompany sales eliminations and corporate costs $537M $91M $310M $64M Sales EBITDA Specialty Engineered Materials Color Additives and Inks $134M$846M (1) 9 Q1 2023 SALES BY REGION Yo Y C H A N G E ( E X C L . National Defense budget of $842 billion submitted to Congress in Q1 2023 • European NATO members annual defense spend expected to increase by up to 20%  Dyneema® is the world’s strongest fiber™  One of the highest strength to weight ratios of any material on Earth  Direct relationships with industry leading armor manufacturers  Resistant to most chemicals, UV, and moisture to handle any environment Avient Confidential 13 DEFENSE Source: US Department of Defense, defense.gov, NATO13 Source: TRANSPORTATION • Increased EPA regulations requiring improved fuel efficiency, enabled in part by lower-weight vehicles • Automakers preparing for 2/3 of U.S. vehicles to be 100% electric by 2032  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 14 $130 $530 $0.60 $2.40 2023 GUIDANCE 15 Sales Adjusted EBITDA $845 $3,400 Adjusted EPS (in millions) (in millions) CASH FLOW / LEVERAGE 16 • Maintaining free cash flow and leverage guidance from February earnings call • IT investment to further integrate acquired businesses and capture operational efficiencies • Restructuring actions to streamline operations and improve profitability, primarily in Europe ($ 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 DRIVERS 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% 17 Sustainable Solutions 32% Asia / LATAM Composites 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 18 SUSTAINABILITY INVESTOR DAY 18 $340M $405M $455M $550M $790M $915M 2016 2017 2018 2019 2020PF** 2021 2022PF*** SUSTAINABILITY FOR A BETTER TOMORROW Revenue From Sustainable Solutions* 2016-2022 ($ in millions) Organic Future Growth Revenue Assumptions From Sustainable Solutions: 8 - 12% 19 *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 SUSTAINABILITY NEEDS BY MARKET B&C • Eco-Conscious • Carbon footprint • Resource conservation • Carbon footprint • Bio based content • Eco-Conscious Automotive • Light weighting • Recycled Content • VOC reduction • Recycle Solutions • Carbon Footprint Packaging • Recycle Solutions • Food waste reduction Common Theme: CO2 Emission Goals Increasing Single-Use Plastic Regulation 20 INVESTING IN INNOVATION S U S T A I N A B I L I T Y P O R T F O L I O 21 AP P EN D IX 24 RAW MATERIAL 2022 ANNUAL PURCHASES Performance Additives Pigments 12% TiO2 Dyestuffs 2% Polyethylene Nylon Polypropylene Styrenic Block Copolymer 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% 37% 18% 2022 PRO FORMA SEGMENT, END MARKET AND GEOGRAPHY GEOGRAPHY REVENUESEGMENT FINANCIALS 24% Building and END MARKET REVENUE $2,355M $402M $1,300M $272M Sales EBITDA Specialty Engineered Materials Color Additives and Inks $592M$3,653M (1) 9% 26 (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 2022 REVENUE | $2 .4 B ILL ION 34% 38% END MARKET REGION 27 34% 21% Building & 1% Energy 2% S P E C I A LT Y E N G I N E E R E D M AT E R I A L S 2022 PRO FORMA REVENUE | $1 .3 B ILL ION END MARKET 52% 35% REGION 28 19% 8%Industrial 9% Defense Building & 32% 27% 14% Building & 3% 1% Defense 1% (18% of sales) 9% 2022 PROFORMA AVIENT REGIONAL SALES BY END MARKET 27% 14% 17% Building & (37% of sales)Transportation 24% 12% Building & US & Canada (40% of sales) 56% 23% Building & 1% LATAM (5% of sales) 3% 29 PEER COMPARISONS AVIENT IS ASSET LIGHT Capex / Revenue 2023E (%) Avient Specialty Other Specialty / Note: Avient reflects 2023 estimated revenue of $3,400 and estimated run-rate CAPEX of $110M. 31 4 4 5 5 5 6 7 9 FREE CASH FLOW CONVERSION Note: Free cash flow conversion calculated as (Adjusted EBITDA – Capex) / Adjusted EBITDA.

C er ti fi ed M anagement System s by Switzerland Certificate The SQS herewith attests that the organisation named below has a management system that meets the requirements of the normative base mentioned.

C/Carretera.

PE Tarpaulin manufacturer PP MULTI- FILAMENT MANUFACTURER O U T D O O R C H A I R • Resist UV light degradation in U.S. & European climates for an extended period • Maintain color stability and resist brittleness for a minimum of 3 years • Reliable supplier with good product quality and stable supply • Offered a UV stabilizer for PP multi-filament yarn • Delivered good light fastness • Provided cost effectiveness by combining colorant and UV additive solutions • Had in-house Q-Lab UV (QUV) tester to meet strict customer standards Smartbatch Combination Colorants & Additives KEY REQUIREMENTS WHY AVIENT?

Bergmann GmbH Adolf-Dambach-Str. 2-4 76571 Gaggenau c/o Avient ECCOH High Performance Solutions GmbH Oldendorfer Straße 9, 49324 Melle Production of technical Polymers

CONCRETE REINFORCEMENT I N F R A S T R U C T U R E R E P A I R • Alternative to steel for reduced weight and improved corrosion resistance • Surface modification capabilities to improve concrete adhesion • Superior strength-to-weight ratio • Durable, long-lasting performance to extend service life • Provided peel ply and other surface modification capabilities that comply with specific CA regulations and allowed for better adhesion with concrete • Performed with higher strength-to-weight ratio than typical steel alternatives • Prolonged service life by resisting corrosion and dampening vibration Glasforms™ Carbon Fiber Composites KEY REQUIREMENTS WHY AVIENT?

LOADING DOCK SHELTERS R E I N F O R C I N G S T A Y S Replacement for steel or composite stays to provide reliable seal from external environment: • Withstand repeated flex and twisting, pass rigorous proprietary flexural testing requirements • Maintain performance in extreme temperatures • Enabled repeated twisting and flexing without failure, up to 90˚ bends, due to exceptional mechanical properties • Customized finishing to meet specific shape and edge surface requirements • Improved supply reliability with product manufactured in Montrose, CO Gordon Composites™ Thermoset Composite Springs KEY REQUIREMENTS WHY AVIENT?

STRUCTURAL DECKING R E I N F O R C E D H D P E L U M B E R • Reinforcement to improve strength of HDPE decking • Composite tape compatible with HDPE for strong adhesion • Low thermal expansion • Domestic (U.S.) supply and manufacturing • Added strength to HDPE deck boards to enable industry-leading load capacity and joist spacing spans • Extended product life with superior adhesion of PE tape via co-extrusion • Improved supply reliability with product manufactured in Englewood, CO Polystrand™ unidirectional thermoplastic composite tape KEY REQUIREMENTS WHY AVIENT?

DATA STORAGE UNIT MANUFACTURER D A T A S T O R A G E C A R R I E R • Excellent dimensional stability • Good mechanical properties with excellent wear resistance • Flame retardant requirement – FRv0 compliance • UL certification • Provided a customized formulation to meet application-specific lubricity, physical and thermal requirements • Delivered on short lead times to help customer manage working capital LubriOne™ CY1000-000/5T FR V0 BLK001 Formulation KEY REQUIREMENTS WHY AVIENT?

LubriOne_Autoinjector Pen _Application snapshot_0419 AUTO-INJECTOR PEN OEM P L U N G E R S C R E W • Reduce friction and improve durability • Good strength and stiffness • Dimensional stability • Formulated a self-lubricating material to meet injection accuracy requirement • Improved the user experience by improving injector’s wear resistance • Achieved consistent dimensional stability and properties LubriOne™ Internally Lubricated Formulation KEY REQUIREMENTS WHY AVIENT?