S E C U R I TY E Q U I P M EN T M A N U FA C TU R ER 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?

AV I AT I O N C O M P O N E N T S M A N U FA C T U R E R S E A T B E L T C O V E R • Paint-free, metallic look • Reduced Volatile Organic Compounds (VOCs) • Lightweight • Excellent mechanical performance • Non-conductive solution • Provided a non-conductive solution with reduced VOCs and coexisting color and metallic effects • Supplied a technology compatible with PPSU, PES, and PSU • Lowered density compared to virgin resin • Reduced the need for secondary processing and associated VOCs • Supplied low minimum order quantity of gold, silver and bronze colors Colorant Chromatics Metallic Effect Pre- colored Sulfone Colorants KEY REQUIREMENTS WHY AVIENT?

G LO BA L C O N S U M E R E L E C T RO N I C S B R A N D G A M I N G W H E E L G R I P • Soft touch feel • Good bonding with PC+20GF substrate • Non-blooming surface finish • Replaced leather with a TPE to improve production efficiency through overmolding • Provided a recyclable alternative to silicone, giving the customer the choice of more sustainable grip material • Offered durable solution with good wear resistance and excellent chemical and oil resistance Versaflex CE TPE KEY REQUIREMENTS WHY AVIENT?

PowerPoint Presentation P R O S T H E T I C S A N D O R T H O T I C S B R A N D K N E E R A I L & B R A C E • Replace metal to reduce weight • Update design to achieve slimmer design • Offer excellent strength and modulus properties • Improve durability with better fatigue resistance than incumbent aluminum • Increased design freedom and lightweighting for metal replacement applications while meeting structural needs • Delivered excellent fatigue endurance and moisture resistance for enhanced durability • Achieved cost reduction per part by switching to an injection molding process Complēt Long Carbon Fiber Reinforced Structural Thermoplastics WHY AVIENT?

PowerPoint Presentation M E D I C A L D E V I C E M A N U FA C T U R E R O S T O M Y B A G S E A L S • Comply with ISO 10993 and FDA Class II medical device regulations • Offer Good sealing performance • Provide technical supports for processing recommendations • Deliver a high compression set materials to improve comfort • Provided a medical-grade TPE to help the customer meet necessary regulatory specifications and gain market share • Provided technical support during design and the manufacturing process for EVA bonding • Delivered soft-touch feel and excellent sealing performance Versaflex HC Thermoplastic Elastomers - G2705 Formulation KEY REQUIREMENTS WHY AVIENT?

AVIENT CORPORATION I N V E S T O R P R E S E N T A T I O N (NYSE: AVNT) N O V E M B E R 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 U L ATO R 6 CUSTOM FORMULATION N O V E M B E R 2 , 2 0 2 3 W E B C A S T P R E S E N T AT I O N 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 8 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 Formulations9 10 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 10 Q 3 P E R F O R M A N C E 15.4% 16.3% 2022 PF 2023 Results vs. Avient reflects 2023 adjusted EBITDA guidance of $500M and estimated run-rate CAPEX of $110M. 2023E (%) 27 78 89 84 82 80 77 88 81 76 70 69 60 54 (6) A vi en t K W R FU L P P G A V Y R P M FM C C E E C L A S H H X L H U N E M N S C L Avient Specialty Formulators Other Specialty / Chemical Companies MULTIPLE EXPANSION Source: Peer data per Bloomberg as of October 27, 2023 Note: Avient reflects 2023 adjusted EBITDA guidance of $500M and closing share price of $31.18.

ACTIVE INGREDIENTS RESISTANCE RATING Clorox® Disinfecting Wipes 5813-79 Quaternary ammonium +++++ +++++ +++++ ++ +++ ++++ Formula 409® Heavy Duty Degreaser N/A Lauramine oxide, ethanolamine +++++ +++++ +++++ + ++ +++ Lysol® All-Purpose Cleaner 777-66 Quaternary ammonium +++++ +++++ +++++ + + ++ $$$ $$$ $$$$ $ $$$ $ MATERIAL COMPARISON WITH COMMON CONSUMER DISINFECTANTS FR P C/ AB S FR P C/ P ET FR P C/ P BT Ed ge te k™ E T8 90 0 CR Ed ge te k™ E T8 90 0 H I C R Ed ge te k™ E T8 92 0 FR C RCRITERIA FOR RESISTANCE RATING + strength and elongation at yield retention between 90-110% + strength and elongation at yield retention between 75-125% + no statistically significant reduction in elongation at break (p < 0.05) + visual observation score of 4 or better (minor/no crazing, no cracks) + samples survived disinfectant exposure in strain jig Lysol® is a trademark of Reckitt Benckiser LLC Formula 409® is a trademark of The Clorox Company Clorox® is a trademark of The Clorox Company An independent, A2LA-accredited lab tested the following polymers with various disinfectants to help customers choose the material suitable for their specific application requirements.

°C TBD Property UOM Value Breaking Tenacity g/d 8.4 Specific Gravity Ratio 1.38 Elongation @ Break % 19.5 Tensile Modulus g/d 70 Moisture Regain* % 0.4 Creep** % 1.0 – 12.0 Shrinkage*** % 3.0 – 8.0 Melt Point °C 256 Decomposition Temp. °C TBD High Tenacity Low Shrink MOVING HIGH PERFORMANCE FIBERS FORWARD This data is provided for informational purposes only, and does not constitute a specification. PET POLYESTER DATA PET POLYESTER BARE FIBER PERFORMANCE * Equilibrium moisture regain @ 55% RH ** Creep @ 40%-58% ultimate tensile strength *** Shrinkage in dry air @ 177 C for 30 minutes MOVING HIGH PERFORMANCE FIBERS FORWARD ABOUT FIBER-LINE® LOCATIONS Headquarters, R&D, Manufacturing FIBER-LINE® LLC 3050 Campus Drive Hatfield, PA 19440 +1 215.997.9181 fiber@fiber-line.com Manufacturing Operations FIBER-LINE® LLC 280 Performance Drive SE Hickory, NC 28602 +1 828.326.8700 fiber@fiber-line.com EMEA & Asia Pacific Operations FIBER-LINE® INTERNATIONAL B.V.

Abrasion Resistance Yarn on Yarn Abrasion Ultraviolet (UV) Resistance Flame Resistance Chemical Resistance (Acid) Chemical Resistance (Alkali) Chemical Resistance (Organic Solvent) X X O P P P P Property UOM Value Breaking Tenacity g/d 6.7 – 9.4 Specific Gravity Ratio 2.48 Elongation @ Break % 5.5 Tensile Modulus g/d 140 – 170 Moisture Regain* % °C TBD Property UOM Value Breaking Tenacity g/d 6.0 – 7.3 Specific Gravity Ratio 2.58 Elongation @ Break % 3.5 Tensile Modulus g/d 200 – 275 Moisture Regain* % °C TBD FIBERGLASS BARE FIBER PERFORMANCE FIBERGLASS DATA E-Glass S-Glass * Equilibrium moisture regain @ 55% RH ** Creep @ 40%-58% ultimate tensile strength *** Shrinkage in dry air @ 177 C for 30 minutes MOVING HIGH PERFORMANCE FIBERS FORWARD ABOUT FIBER-LINE® For over 25 years, FIBER-LINE® has provided science- driven expertise that improves the performance and the end-use processing of high performance fibers.

°C TBD Property UOM Value Breaking Tenacity g/d 42.0 Specific Gravity Ratio 1.56 Elongation @ Break % 2.5 Tensile Modulus g/d 1800 Moisture Regain* % 0.6 Creep** % 0 Shrinkage*** % °C TBD Standard Modulus High Modulus CHEMICAL COMPATIBILITY Chemical Resistance to Acid: Strength loss in HCl, HNO3, H2SO4 & NaCl. POLYBENZYLOATE (PBO) DATA POLYBENZYLOATE (PBO) BARE FIBER PERFORMANCE * Equilibrium moisture regain @ 55% RH ** Creep @ 40%-58% ultimate tensile strength *** Shrinkage in dry air @ 177 C for 30 minutes MOVING HIGH PERFORMANCE FIBERS FORWARD ABOUT FIBER-LINE® LOCATIONS Headquarters, R&D, Manufacturing FIBER-LINE® LLC 3050 Campus Drive Hatfield, PA 19440 +1 215.997.9181 fiber@fiber-line.com Manufacturing Operations FIBER-LINE® LLC 280 Performance Drive SE Hickory, NC 28602 +1 828.326.8700 fiber@fiber-line.com EMEA & Asia Pacific Operations FIBER-LINE® INTERNATIONAL B.V.