Additionally, Adjusted EPS excludes the impact of special items and amortization expense associated with intangible assets. 2 COMPOSITES PORTFOLIO 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 4 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 5 COMPOSITES SERVE DIVERSIFIED END MARKETS INDUSTRIAL Lifting Slings • Aquaculture High Pressure Pipe Conveyer Springs Q 2 P ER FO RM A N CE Q2 2023 PERFORMANCE VS. Global Compact • Highlights ESG Performance, including ratings, awards, and certifications • Features increased carbon emissions disclosures, including Climate Change Scenario Analysis and Scope 3 emissions data • Outlines Sustainable Supplier Program, designed to enable supplier evaluation & collaboration • Reflects Great Place To Work® culture focused on safety, employee engagement and advancing diversity, equity and inclusion 2022 SUSTAINABILITY REPORT 15 Avient Confidential 16 • Virtual presentation to be held September 20, 2023 • Leadership will be conducting an investor-focused presentation around our sustainable solutions portfolio • Deep dive into how we enable customers to achieve their sustainability goals SUSTAINABILITY DAY 16 …are Growing at Twice the Rate as Conventional Products Sustainably-Branded Products… STAKEHOLDER INFLUENCE DRIVES DEMAND Consumers Are demanding recyclability and eco- conscious products Governments Are mandating changes through legislation, taxes, and regional accords Brand Owners Have committed to ambitious goals to achieve sustainability metrics 17 AP P EN D IX 20 Performance Additives 16% 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 2022 pro forma results for the acquisition of Avient Protective Materials RAW MATERIAL BASKET PEER COMPARISONS AVIENT IS ASSET LIGHT Capex / Revenue 2023E (%) Avient Specialty Other Specialty / Note: Avient reflects 2023 estimated revenue of $3,280 and estimated run-rate CAPEX of $110M. 22 3 2 3 3 4 4 3 3 4 5 5 7 8 8 FREE CASH FLOW CONVERSION Note: Free cash flow conversion calculated as (Adjusted EBITDA – Capex) / Adjusted EBITDA.

FL.Datasheet WireHarnessYarn.indd FIBER OPTICAL CABLES Key Features • Available flat, twisted, or cord • Reduction in overall weight & energy usage • High temperature resistance • Protection from thermal degradation • Various colors available for easy identification • Abrasion resistant FIBER-LINE® FIBERS FOR WIRE HARNESS YARN • Kevlar® Para-Aramid • Nomex® Meta-Aramid • Technora® Para-Aramid • PET Polyester FIBER-LINE® PERFORMANCE ADDING COATINGS • FIBER-LINE® Colorcoat™: Color Identification • FIBER-LINE® Wearcoat™: Abrasion & High-Temperature Resistance • FIBER-LINE® Bondcoat™: Adhesion & Bonding • FIBER-LINE® Flamecoat™: Flame retardancy Overview • FIBER-LINE® provides a wide range of products utilized for wire harnesses. WHY FIBER-LINE® WIRE HARNESS YARN? POPULAR WIRE HARNESS PRODUCTS 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.

Aimed at delivering environmental benefits such as a reduced carbon footprint and lower energy consumption, these materials are formulated to perform while meeting the growing demands of environmentally conscious consumers. Reduced carbon footprint

Reduce Carbon Footprint They are formulated with bio-based polymers and pre-tested raw materials to help reduce carbon footprint and mitigate the risk of non-compliance during regulatory submission.

Light-weighting solutions that replace heavier traditional materials like metal, glass and wood, which can improve fuel efficiency in all modes of transportation and reduce carbon footprint  Sustainable infrastructure solutions that increase energy efficiency, renewable energy, natural resource conservation and fiber optic / 5G network accessibility 

Focusing on a Sustainable Future: Avient Joins as bluesign® SYSTEM PARTNER for Dope-Dyeing Fiber Colorants Avient Joins bluesign® SYSTEM for Dope-Dyeing Fiber Colorants.

Avient Extends Bio-Based Polyolefin Range, Utilizing the Benefits of Cellulose Fiber New Maxxam™ BIO Bio-Based Polyolefins can be filled with up to 40% bio-filler from cellulose fiber. 

PolyOne Advanced Long-Fiber Technology Enables Resol’s Award-Winning Furniture Line CLEVELAND – Resinas Olot SL (Resol) recently selected PolyOne’s OnForce™ LFT long fiber solutions to replace the aluminum legs on its

PolyOne Acquires Magenta Master Fibers Specialty acquisition broadens solutions portfolio of colorant and additives technologies for fiber applications Extends PolyOne's existing reach

Non-PFAS, Flame-Retardant Formulations Expand Avient’s Complēt™ Long Fiber Polyketone Portfolio Avient adds non-PFAS flame-retardant formulations to its Complēt™ PKE long fiber reinforced portfolio To download a high-resolution image,