FILM MANUFACTURER B L O W N F I L M • Maintain comparable performance to PFAS additives • Meet regulatory compliance • Eliminate melt fracture and reduce die buildup • Increase productivity by reducing product changeover time • Provided a non-PFAS formulation that met all performance and regulatory requirements and did not interact with other additives • Helped eliminate melt fracture with a quick time to clear of under forty minutes • Delivered technical support, including comprehensive testing on various chemistries and polymers • Attained high throughput with a minimal amount of additive Cesa™ Non-PFAS Process Aid for Extrusion KEY REQUIREMENTS WHY AVIENT?

HVAC Thumb Wheel and Vent NEW ENERGY VEHICLE OEM H V A C T H U M B W H E E L & V E N T • Reliable sealing performance • Excellent abrasion resistance • Good bonding with PA6 • Formulated a TPE with good sealing and insulation for gaskets within the vent to minimize air and moisture leaks, improving the overall efficiency and performance of the HVAC system • Provided a solution that resisted wear, abrasion, and impact to enhance the longevity of components Versaflex Thermoplastic Elastomers KEY REQUIREMENTS WHY AVIENT?

POWER TOOL MANUFACTURER P O W E R T O O L B A T T E R Y P A C K • Non-Halogen to industry standards • Increased thermal conductivity • Good impact properties • Easy to process • Corporate color • Provided a non-halogenated solution for Bosch while increasing the thermal conductivity • Supported with regulatory and technical knowledge • Helped to source a UL-listed material from the EU for production in China with identical quality Maxxam NHFR Non-Halogen Flame Retardant Polyolefin Formulation KEY REQUIREMENTS WHY AVIENT?

Appliance Manufacturer APPLIANCE MANUFACTURER P U S H B U T T O N S • Non-halogen to industry standards • Lower density • Good impact properties • Easy to process • High aesthetics • Provided a non-halogenated solution while improving the performance of the formerly used halogenated grade • Supported the project with various expertise in design, regulatory and technical support • Helped to reduce the system cost and make our customer more competitive in the market Maxxam NHFR Non-Halogen Flame Retardant Polyolefin Formulation KEY REQUIREMENTS WHY AVIENT?

as well, but what further differentiates us, is that in 2020 our EPS also grew 11% vs. 2019. You are advised to consult any further disclosures we make on related subjects in our reports on Form 10-Q, 8-K and 10-K that we provide to the

AVIENT CORPORATION T H I R D Q U A R T E R 2 0 2 3 R E S U L T S (NYSE: AVNT) N O V E M B E R 2 , 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. Additionally, Adjusted EPS excludes the impact of special items and amortization expense associated with intangible assets. 2 O P E N I N G R E M A R K S B O B P A T T E R S O N C H A I R M A N , P R E S I D E N T A N D C E O Complementary technologies and customer relationships offer opportunity to advance commercial strategy Dyneema®, the world’s strongest fiber™, to accelerate growth of sustainable, ultralight and high performance applications AVIENT PROTECTIVE MATERIALS FIRST YEAR 4 Composites comprises over half of Specialty Engineered Materials, compared to 9% in 2016 Proven history of success in areas such as outdoor high performance, defense and sustainable solutions Composites 44% 56% 2023E Sales Collaboration & InnovationComposites as a % of SEM People & Culture Talented, passionate, and creative associates drive continued integration success and allow two cultures to come together as one Avient Lightweight Protective Laminates: PROJECTILE PROTECTION Dyneema® Fiber Solutions Cushioning + Fit + Comfort: LONG-TERM WEAR reSound™ Versaflex™ Thermoplastic Elastomers Strength + Durability + Light-Weighting: SOLID MOUNTING BRACKETS Nymax™ Bergamid™ Complēt™ Engineered Materials Durability + Lubricity: HELMET LATCHES Lubri-One™ Internally Lubricated Polymers Color Consistency and Weatherability CUSTOMIZED SPECIFICATIONS Avient Color and Additive Solutions Antennae Performance FAST, RELIABLE CONNECTIONS PREPERM™ Low-Loss Dielectric Thermoplastics AVIENT PROTECTIVE MATERIALS C R O S S S E L L I N G O P P O R T U N I T I E S Wired Connections CONSTANT COMMUNICATION Syncure™ Cross-linkable Wire & Cable Formulations5 6 AVIENT PROTECTIVE MATERIALS C R O S S S E L L I N G O P P O R T U N I T I E S 6 Q 3 P E R F O R M A N C E 15.4% 16.3% 2022 PF 2023 Results vs. PRIOR YEAR $790 $710 2022 2023 $107 $112 2022 2023 Sales Adjusted EBITDA (in millions) $0.42 $0.47 2022 PF 2023 Adjusted EPS (in millions) - 10% + 5% + 12% Sales Adjusted EBITDA Adjusted EPS 12 $112 $500 Q4 FY $0.47 $2.30 Q4 FY Q4 AND FULL YEAR 2023 GUIDANCE $710 $3,130 Q4 FY Sales Adjusted EBITDA Adjusted EPS 13 (in millions) (in millions) Guidance: Free Cash Flow $180 $180 Prior Guidance Guidance FREE CASH FLOW & INCREASED DIVIDEND 13th Consecutive Dividend Increase 0.16 0.26 0.42 0.58 0.79 0.85 0.99 1.03 2011 2013 2015 2017 2019 2021 2023 2024 14 S U S T A I N A B I L I T Y D AY R E C A P SUSTAINABILITY AS A GROWTH DRIVERLONG-TERM REVENUE GROWTH DRIVERS 60%+ Key Growth Drivers Sustainable Solutions Composites, Healthcare, Asia / LATAM Overlap Other (GDP Growth) Total Company Revenue Growth Drivers Long-Term Growth Rate Sustainable Solutions 8–12% Composites 8–10% Healthcare 8–10% Asia / LATAM 5% Other (GDP growth) 0–2% Avient 6% 17 SUSTAINABILITY TRENDS DRIVE LONG-TERM GROWTH 8-12% Long Term Growth 50 90 2022 2030 Medical Plastics Market Size (in $Billions) 2020 2030 Recycled Plastics Virgin Plastics Growing Demand for Recycled Content Avient Sustainable Solutions 18 46 2023 2032 Global Offshore Annual Wind Installations (in Gigawatts) Sources: McKinsey, Bloomberg, Grand View Research SUSTAINABILITY TRENDS DRIVE LONG-TERM GROWTH 18 • Transformative acquisitions combined with divestitures of more cyclical businesses have improved margins over 400 bps since 2018 • 20% long-term margin goal to be driven by key growth drivers, with sustainable solutions playing a meaningful role 5.4% 11.5% 16.0% 2006 2018 2023E Recovery Growth Drivers Strategic Objective 20%+ +1%+ +3%+ ADJUSTED EBITDA MARGIN EXPANSION 19 • 6% annualized long-term sales growth leveraging sustainable solutions, composites, healthcare, and emerging regions • Expand EBITDA margins to 20% • Deliver annual EBITDA and EPS growth of 10% and 15% • Maintain asset-light, 80% free cash flow conversion profile and be valued as a specialty formulator • Continue fostering our Great Place to Work® culture CRE AT ING A WORL D-CL AS S S US TAINABL E ORGANIZ AT ION 20 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.

GLOBAL FRIDGE MANUFACTURER R E F R I G E R A T O R B A S E • Provide 5VA flame retardant rating • Utilize existing molds • Keep the same mechanical and physical properties as current material • Dimensional stability – limit shrinkage of final part • High strength – bearing the weight of the whole fridge • Maintain or reduce weight • Expedited development time, providing solutions ready for testing within a week • Enabled first time approval through close customer collaboration • Provided excellent in person support to both customer and moulder throughout trials • Gave technical advice on how to adjust processing parameters, enabling the use of existing molds with the new material Maxxam™ FR Flame Retardant Formulations KEY REQUIREMENTS WHY AVIENT?

ED WARDS DESIGN & FABRICATION M O D U L A R M I L I T A R Y B A L L I S T I C S H E L T E R S • Blast and bullet resistance to protect soldiers and military assets in mortar pits, shelters, and guard towers • Lightweight for portability and quick deployment without heavy equipment • Specific colors required to provide visual cover in the field • Provided UL 752 Level 3 ballistic resistance, additional protection by layering panels • Reduced weight by 75% compared to steel, improved portability over concrete or sandbags • Enabled easy installation with common carpentry tools • Customized color formulations to meet needed camouflage without painting GlasArmor™ Ballistic Resistant Composite Panels KEY REQUIREMENTS WHY AVIENT?

AU TO M O T I V E M I R R O R & C A M E R A M A N U FA C T U R E R C A B L E G R O M M E T • Electrically conductive

ARCHERY OEM C O M P O U N D B O W G R I P • UV resistant and colorable TPE for haptics • Substrate with structural integrity to support 70-80 lbs of torque during draw and excellent dimensional stability to ensure bow accuracy and precision • Reliability of supply while also offering comparable performance to incumbent materials Nymax™ 1010A PA 6 Nylon Formulation & Versaflex™ OM 6160 TPE KEY REQUIREMENTS WHY AVIENT?