AVIENT CORPORATION S E C O N D Q U A R T E R 2 0 2 3 R E S U L T S (NYSE: AVNT) J U L Y 2 7 , 2 0 2 3 D I S C L A I M E R 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. expectations: US & Canada LATAM EMEA Asia • Net price benefit remains greater than wage and energy inflation • Clariant synergies and reduced administrative costs Q2 2 023 SEQUENTI AL SAL ES BY REGI ON Q 2 2 0 2 3 v s . Avient reflects 2023 adjusted EBITDA guidance of $525M and estimated run-rate CAPEX of $110M. 2023E (%) 23 79 90 84 83 76 73 88 82 77 74 72 67 57 20 A vi e n t K W R P P G F U L A V Y R P M F M C C E H X L E C L A S H H U N E M N S C L Avient Specialty Formulators Other Specialty / Chemical Companies MULTI PL E EX PANSION Source: Peer data per Bloomberg as of 2023年7月21日 Note: Avient reflects 2023 adjusted EBITDA guidance of $525M and closing share price of $40.93.

Microsoft PowerPoint - AVNT M8 Investor Presentation AVIENT CORPORATION I N V E S T O R P R E S E N T A T I O N (NYSE: AVNT) A U G U S T 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. For the same reasons, Avient is unable to address the probable significance of the unavailable information. 2 3 AVIENT OVERVIEW 2023 Financial ResultsCompany Overview Revenue By: 9,300 Employees 102 Manufacturing Sites 20,000+ Customers  Innovating materials and processing solutions to solve our customers’ challenges while enabling a sustainable world  Broad portfolio of technologies with market leading positions and flexibility to anticipate and meet customer needs  Focus is on organic revenue growth and margin expansion, following our successful portfolio transformation $3.14B Revenue $2.36 Adjusted EPS $502M Adjusted EBITDA 16.0% Adjusted EBITDA Margins $186M Adjusted Free Cash Flow U.S. & 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 Margin 16.9% +100 bps Q 2 2 0 2 4 R E S U L T S Q2 2024 PERFORMANCE VS.

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? EPS: $2.50 Assumptions • High single digit organic revenue CAGR • Operating margins in mid range of 2015 targets • Housing starts at 85% of 50 year norm by 2015 • No investment in incremental PP&S capacity • Completion of 2-3 midsize accretive acquisitions • No divestitures • Remain comfortably below 3X Net Debt / EBITDA • No global recession 2011 Rev: $2.9B Adj.

Industrial Valle del Cinca S/N Apartado E-22300 Barbastro Spain Avient Corporation - Berea, OH Liquid Colorants and Additives for Plastics , 680 N. Page 2 of 4 https://abs.ez2xs.com https://abs.ez2xs.com A B S Q u al it y E va lu at io n s C er ti fic at io n E Avient Corporation - Cergy, France Design and Manufacture of Color and Additive Concentrates and Specialty Compounds , 14 Avenue de l'Eguillette Saint Ouen l'Aumône - 95310 France Avient Corporation - Esenyurt, Turkey Design and Manufacture of Specialty Engineered Thermoplastics Orhangazi Mah. 1683 Sok. Page 3 of 4 https://abs.ez2xs.com https://abs.ez2xs.com A B S Q u al it y E va lu at io n s C er ti fic at io n E Avient Corporation - Mountain Top, PA Manufacturing, Shipping and Receiving , 855 Oak Hill Road Mountain Top - PA 18707 United States Avient Corporation - Oricain (Pamplona), Spain Design and Manufacture of Color and Additive Concentrates and Specialty Compounds Pol.

All Rights Reserved 2024 16 Launch Growth Maturity Decline T I M E S A L E S 1. 2. 3. 1 2 3 Portfolio prioritization & building new trajectories of growth Portfolio view 17Copyright © . • New growth opportunities in prefabricated / modular construction - driven by lightweighting, waste reduction, and energy efficiency • Avient differentiation is with operational velocity, manufacturing capability and added functionality with flame retardancy vital to this space $20B ADDRESSABLE MARKET A V I E N T T E C H N O L O G I E S , S O L U T I O N S Ballistic-resistant panels Composite lumber reinforcement Functional panels - interiors and exteriors Fire-retardant thermoplastic panels Copyright © . $8B ADDRESSABLE MARKET A V I E N T T E C H N O L O G I E S , S O L U T I O N S Cross arms Turbine blade stiffeners Utility poles Insulator rods Copyright © .

AVIENT CORPORATION I N V E S T O R P R E S E N T A T I O N (NYSE: AVNT) A U G U S T 2 0 2 3 D I S C L A I M E R 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. W H AT W E D O : W E A R E A F O R M UL ATO R 6 CUSTOM FORMULATION J U LY 2 7 , 2 0 2 3 W E B C A S T P R E S E N TA T I O N COMPOSI TES PORTF OL IO D Y N E E M A ® E X P A N D S O U R E N G I N E E R E D F I B E R S A N D P A N E L S T E C H N O L O G Y LFT Tapes Laminates/Panels Shapes Pultrusion Engineered Fibers 8 DEFENSE TELECOMMUNICATIONS ENERGY TRANSPORTATION Military • Law Enforcement First Responders Body Armor • Helmets Vehicle Protection Sustainable Infrastructure Offshore Wind Electrical Grid Protection EV Battery Components Commercial Laminates Body & Trim • Air Cargo and Railroad Car Panels 5G Applications Fiber Optic Cables Satellite Communications Connectors and Components 9 COMPOSI TES SERVE D IV ER SIF IED END MAR KETS INDUSTRIAL Lifting Slings • Aquaculture High Pressure Pipe Conveyer Springs Q 2 P E R F O R M A N C E Q2 2023 PERFORMANCE VS. expectations: US & Canada LATAM EMEA Asia • Net price benefit remains greater than wage and energy inflation • Clariant synergies and reduced administrative costs Q2 2 023 SEQUENTI AL SAL ES BY REGI ON Q 2 2 0 2 3 v s .

EPS guidance 2025 financial guidance ▲ Further Fed rate cuts ▲ Chinese stimulus ▲ Economic recovery in Europe ▲ Continued strength in defense applications for both military and local law enforcement ▼ Policy uncertainty and changes ▼ Persistent inflation impacting consumer spending / slowdown of US economy ▼ Further deterioration of Europe economy ▼ FX volatility M A C R O A S S U M P T I O N S I N F L U E N C I N G R A N G E 19Copyright © . All Rights Reserved 2025 Avient 2024 sales B U S I N E S S S E G M E N T S E N D M A R K E T S R E G I O N S 63% 37% S E M C A I 23% 20% 15% 10% 10% 8% 7% 4% 3% Packaging Telecom Energy Defense Healthcare Building & construction Transportation Industrial Consumer 41% 35% 18% 6% US & Canada Latin America Asia Europe, Middle East and Africa 20Copyright © . All Rights Reserved 2025 Color, Additives & Inks E N D M A R K E T S R E G I O N S 34% 21% 15% 11% 9% 8% Packaging Telecom 1%Energy 1% Transportation Industrial Consumer 34% 37% 20% 9% US & Canada Latin America Asia Europe, Middle East and Africa Healthcare Building & Construction 21Copyright © .

P R O D U C T O R L Í D E R D E TA P O N E S PA R A B E B I DA S A L C O H Ó L I C A S T A P O N E S D E L U J O • Se sustituye el metal al mismo tiempo que se ofrece aspecto y sensación metálicos • Personalización de densidad y color • Procesamiento sencillo • Cumplimiento con las normas de la FDA • El metal se sustituye con un compuesto plástico de densidad modificada para mantener una percepción de alta calidad • Se redujo al mínimo la aparición de desportilladuras por el desgaste cotidiano, que supera al metal porque permite hacer coincidir el interior de la tapa con los colores de revestimiento metalizado • Permitió al cliente introducir sus tapones de lujo en un nuevo segmento del mercado Formulación de densidad modificada Gravi- Tech™ REQUERIMIENTOS CLAVE ¿POR QUÉ AVIENT?

G E N O M I C D I AG N O S T I C D E V I C E M A N U FAC T U R E R I N - V I T R O D I A G N O S T I C ( I V D ) D E V I C E MEVOPURTM Laser-Transmitting and Laser-Absorbing Pre-color Solution AV I E N T S O L U T I O N • Customized solutions - Quality-by-Design (QdB) approach • Optimized pigment / additive selection – good distribution in final part minimizes welding failure • Mitigated contamination and extractable risk on incoming raw material with control based on fingerprinting • Ensured uninterrupted supply from multiple ISO13485-2016 certified sites • Minimized risk of change with change control agreements W H Y AV I E N T K E Y R E Q U I R E M E N T S P R O D U C T I V I T Y & Q U A L I T Y • Good weldability, low rejection rate • Solutions in wide range of polymers, colors and transparency • Pre-tested ingredients to biocompatibility and extractable metals L E A R N M O R E https://www.avient.com/products/polymer-additives/performance-enhancement-additives/mevopur-functional-additives

IMPACT PROTECTION D E S I G N A N D M A T E R I A L S O L U T I O N S Avient Corporation 1 PROJECT KICK OFF B R I E F Application: Protective sports equipment Challenge: Provide functional material to protect against impact for chest protector Requirements: • Compact - reduce thickness and weight for improved comfort and functionality • Meet EN standards • EN1621-1 level 2 & EN1621-2 level 1 • Eliminate the use of foam and glue • Be waterproof and easy to clean • Sustainable • Easy to prototype & considers manufacturing efficiency Avient Corporation 2 VIBRATION DAMPING TECHNOLOGY (VDT) H O W D O E S I T W O R K ? 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