APPENDIX Performance Additives 15% Pigments TiO2 Dyestuffs 3%Polyethylene Nylon 6% Polypropylene Other Raw Materials 30% Styrenic Block Copolymer ~40% hydrocarbon based (Grey shaded materials are hydrocarbon based, includes portion of “Other Raw Materials”) Non-hydrocarbon based materials 31 • Significant raw material price inflation and tight inventory continued in Q4 2021 o For the full year, the average cost of hydrocarbon based materials was up 50% in 2021 o For the full year, the average cost of non- hydrocarbon based materials was up 12% in 2021 • Additionally, we continued to experience other supply chain challenges during Q4 related to raw material spot purchases, freight constraints and productivity loss as a result of these shortages Annual Purchases RAW MATERIAL AND SUPPLY CHAIN UPDATE Based on 2021 purchases, excludes Distribution business SEGMENT DATA U.S. & Canada 50% Latin America 9% 2021 SEGMENT, END MARKET AND GEOGRAPHY 33 GEOGRAPHY REVENUESEGMENT FINANCIALS 23% 19% Building and END MARKET REVENUE (1) Total company sales and adjusted EBITDA of $4,819M and $581M, respectively, include intercompany sales eliminations and corporate costs $2,402M $409M $919M $164M $1,631M $94M Sales EBITDA Distribution Specialty Engineered Materials Color Additives and Inks $581M$4,819M 15% 34% 21% Building & 9% 1% Telecommunications C O L O R , A D D I T I V E S & I N K S 2021 REVENUE | $2 .4 BILL ION 32% 40% 21% Latin America END MARKET REGION 34 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 27% Building & 2021 REVENUE | $919 MILLION END MARKET 55% 20% REGION 35 DI S TR IBU T I ON 26% 23% 20% Building and 80% 3% Latin America END MARKET REGION K E Y S U P P L I ER S 2021 REVENUE | $1 .6 B ILL ION 36 TOTA L C O M PA N Y R E G I O N A L S A L E S BY END MARKET 30% 26%Healthcare 14% Building & 2% Energy (16% of sales) 32% Building & (25% of sales) 37 19% Building & US & Canada (50% of sales) 38% 33% Building & LATAM (9% of sales) 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.

NYMAX™ POLYMER FORMULATIONS PRIME & RECYCLED NYLON THERMOPLASTICS PROCESSING GUIDE 2 Nymax Polymer Formulations Nymax™ and Nymax™ REC Formulations Nymax™ thermoplastics include prime and recycled nylon formulations in both unfilled grades and with various levels of glass fiber and mineral reinforcements. The portfolio is specifically formulated for applications requiring high stiffness, tensile properties, heat resistance, impact performance, and durability in harsh environments while offering the ease of processing in most standard thermoplastic processing equipment.

Avient offers a broad range of specialized and sustainable engineered polymers, thermoplastic elastomers, colorants, and additives that can be formulated to meet custom product specifications and performance requirements of a given application. Industrial Design • Research methodologies • Brainstorming/problem solving • Concept sketching • Ergonomic development • 3D CAD modeling • Photo rendering & 3D prototyping • Color, material, & finish selection • Design for manufacturing Part/Tool/Process Design Optimization Prototype Capabilities • Over 10 injection molding machines ranging from 50–550 tons: - Materials sampling and evaluation • Fully automated continuous fiber reinforced thermoplastic (CFRTP) injection-overmolding cell - Prototyping combinations of injection molded discontinuous fiber reinforced thermoplastics with CFRTP inserts • Full suite of auxiliary support equipment including: - Material drying - Water and hot oil thermolators for mold heating - Ultrasonic welding for inserts - Secondary & post operations • 150-ton compression molding presses • Profile extrusion • Co-extrusion film and wire & cable • Over 20 molds at varying geometries to validate structural, application, and functional performance.

Avient offers a broad range of specialized and sustainable engineered polymers, thermoplastic elastomers, colorants, and additives that can be formulated to meet custom product specifications and performance requirements of a given application. Industrial Design • Research methodologies • Brainstorming/problem solving • Concept sketching • Ergonomic development • 3D CAD modeling • Photo rendering & 3D prototyping • Color, material, & finish selection • Design for manufacturing Part/Tool/Process Design Optimization Prototype Capabilities • Over 10 injection molding machines ranging from 50–550 tons: - Customer prototype molding - Materials sampling and evaluation • Fully automated continuous fiber reinforced thermoplastic (CFRTP) injection-overmolding cell - Prototyping combinations of injection molded discontinuous fiber reinforced thermoplastics with CFRTP inserts • Full suite of auxiliary support equipment including: - Material drying - Water and hot oil thermolators for mold heating - Ultrasonic welding for inserts - Secondary & post operations • 150-ton compression molding presses • Profile extrusion • Over 20 molds at varying geometries to validate structural, application, and functional performance.

KEY CHARACTERISTICS • Ease of conversion from liquid plastisol to fused thermoplastic solid • Available in a range of hardness and colors • Used in molding, casting and dip coating, including hot and cold dipping • Customizable formulations for automotive, healthcare, industrial and other specialty applications to comply with regulatory requirements including FDA, RoHS, REACH, Prop-65, CPSIA and CONEG • Non-phthalate formulations available for healthcare, playground equipment, outdoor furniture and other high-touch applications MARKET AND APPLICATIONS CORE™ Vinyl Plastisols are available for a wide variety of uses, including: • Automotive air filters • Tool handles, grips • Outdoor furniture and playground equipment • Fencing, wire grates • Industrial textiles • Healthcare masks, molds, medical tape, manikins and stethoscopes • Medical cannula • Sound barriers • Seals/barriers for food packaging • Construction coatings • Electrical insulators • Protective caps • Antistatic flooring and mats www.avient.com Copyright © 2020, Avient Corporation.

Versaflex™ HC and Versaflex™ HC BIO Thermoplastic Elastomers TPEs for Biopharmaceutical Tubing (BT) The Versaflex™ HC and Versaflex™ HC BIO BT series is formulated specifically to handle the complexities of biopharma tubing.

https://www.avient.com/products/engineered-polymer-formulations/chemical-corrosion-resistant-formulations/trilliant-hc-healthcare-thermoplastics

MAJOR TELECOM COMPANY B A S E S T A T I O N P H A S E S H I F T E R • Required customized Dk / Df values tailored to a unique antenna design • Quick qualification of designs and short lead times were critical to support the rapid rollout of new 5G networks • Met required Dk / Df properties using two customized solutions offering Dk 3.6, Df 0.0006 and Dk 3.1, Df 0.0007 • Accelerated speed to market due to thermoplastics’ design flexibility Custom Edgetek™ Formulations 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?

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?