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PowerPoint Presentation Avient Corporation AVNT FEBRUARY 13, 2025 Fourth quarter and full year 2024 results 2025 financial guidance Copyright © . 2025 2 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. The world’s strongest fiber™ Dyneema® HB330, HB332 Advanced hard ballistic unidirectional materials for personal and vehicle armor Unmatched ballistic protection Maximum V50 ballistic performance to stop high-velocity threats Outstanding thermal behavior Retains performance in extreme conditions Ultra-light strength Lightest solution without compromising protection Defense: enabling up to compared to Dyneema® gen-2 materials currently used 20% weight savings Law enforcement: enabling up to compared to Dyneema® gen-1 materials currently used 45% weight savings Q4 2024 Copyright © . 2025 8 Q4 2024 performance vs guidance • Adjusted EBITDA of $110M includes unfavorable FX of $2M 110 Guidance Actual RANGE 109 114 Adj. Specialty Engineered Materials END MARKETS REGIONS 17% 14%13% Defense Packaging Telecom 54% 33% US & Canada Europe, Middle East Energy Copyright © . 2025 22 Avient 2024 regional sales, by end market US & CANADA 41% of sales EMEA 35% of sales ASIA 18% of sales LATIN AMERICA 6% of sales 22% Packaging TelecomEnergyDefenseHealthcareBuilding & TransportationIndustrialConsumer 26% 16% 31% 26% 1%1% 2% 61% Copyright © . 2025 23 NON-HYDROCARBON MATERIALS HYDROCARBON-BASED ~35% of the raw material basket including part of “Other raw materials” are hydrocarbon-based Raw material basket 16% 4% 4% Performance additives Pigments TiO2 Dyestuffs Styrenic block copolymers Polypropylene Nylon Polyethylene Other raw materials 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.

Avient can custom formulate materials for 5G antennas that meet specified dielectric constant (Dk) values, sample within one week, and deliver on production quantities within two to three weeks. HOW AVIENT CUSTOM POLYMER FORMULATIONS MAKE THE DIFFERENCE FOR 5G BASE STATION ANTENNA PHASE SHIFTS Faster Design Qualification & Shorter Lead Times – Avient can custom formulate materials to specific Dk values, sample within one week, and deliver on production quantities within two to three weeks.

Glass fiber reinforced polymer (GFRP) dowel bars offer advantages over traditional steel or epoxy- coated steel bars: • Electromagnetic transparency: ideal for high- speed toll roads to prevent interference • Corrosion resistance: the GFRP material will not rust or corrode in salt or alkaline environments • Light weight: less than one-third the weight of steel • Does not bond to concrete: eliminates the need for sleeves or grease to allow for expansion and contraction Glasforms™ composite dowel bars are tested and approved to meet the following requirements: • ASTM 1356 Glass Transition Temperature • ASTM D570 Water Absorption • ASTM 2344 Short Beam Strength • ASTM 7617 Transverse Shear Strength Glasforms™ Composite Dowel Bars for Concrete Pavement Construction APPLICATION OVERVIEW WHY GLASFORMS PULTRUDED COMPOSITES? Glasforms is one of the world’s most respected brands in pultruded fiber reinforced polymers (FRP) and advanced composites.

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