& Canada 64% 36% Specialty Engineered Materials Color Additives and Inks 40% 37% 18% 9% 4% 4% Building & Energy Telecom 4 CREATING A WORLD-CLASS SUSTAINABLE ORGANIZATION 1. 6.5% annualized long term sales growth leveraging sustainable solutions, composites, healthcare and emerging regions 2. 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 19 Avient Confidential 20 • 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 20 …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 21 AP P EN D IX 24 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. 26 3 3 4 4 4 5 5 7 7 9 10 FREE CASH FLOW CONVERSION Note: Free cash flow conversion calculated as (Adjusted EBITDA – Capex) / Adjusted EBITDA. Avient 2011 and 2018 valuations reflect trailing 12 months EBITDA at December 31 of the respective years. 28 EV / 2023E EBITDA Historic Multiple 6.5 8.3 9.5 13.8 12.7 12.6 11.3 8.7 18.6 16.5 10.1 10.0 9.7 9.5 9.4 8.7 01 1) 01 8) 02 3) Avient Specialty Other Specialty / SEGMENT DATA U.S. & Canada 40% 37% 18% 2022 PRO FORMA SEGMENT, END MARKET AND GEOGRAPHY GEOGRAPHY REVENUESEGMENT FINANCIALS Building and END MARKET REVENUE $2,355M $402M $1,300M $272M Sales EBITDA Specialty Engineered Materials Color Additives and Inks $592M$3,653M (1) 9% 30 (1) Total company sales and adjusted EBITDA of $3,653M and $592M, respectively, include intercompany sales eliminations and corporate costs 2022 REVENUE | $2 .4 B ILL ION 34% 38% END MARKET REGION 31 34% 21% Building & 1% Energy 2% COLOR, ADDITIVES & INKS 2022 PRO FORMA REVENUE | $1 .3 B ILL ION 52% 35% 32 19% 8%Industrial 16% 9% Defense Building & END MARKET REGION SPECIALTY ENGINEERED MATERIALS 32% 27% 14% Building & 3% 1% Defense 1% (18% of sales) 9% 2022 PROFORMA AVIENT REGIONAL SALES 27% 14% 17% Building & (37% of sales)Transportation 12% Building & US & Canada (40% of sales) 7% 56% 23% 7% Building & 1% LATAM (5% of sales) 3% 33 BY END MARKET 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.

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PHTHALATES IN PLASTICS KNOWING THE FACTS Phthalates are a group of chemicals used to make plastics, and in particular polyvinyl chloride (PVC), more flexible. Examples of common applications include medical tubing, inflatables, packaging film and sheets, garden hoses, toys and automotive plastics.

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color and additive masterbatch business.  is a premier provider of specialized polymer materials, services and solutions. Reconciliation of Non-GAAP Financial Measures (Unaudited) (Dollars in millions, except per share data)

OnColor™ REC Polymer Colorants OnColor™ REC Polymer Colorants are derived from recycled content, making them a sustainable alternative to concentrates using virgin carbon black. A PCF calculation for the use of OnColor REC colorants is available on request. These versatile colorants can be used in multiple resins and are available in standard or custom color solutions.

Avient’s Chin Bee Site in Singapore has earned ISCC PLUS accreditation for polymer products with mass balance-certified bio-derived feedstock content. Avient is experiencing a significant surge in demand for sustainable materials solutions, particularly in the Asia-Pacific region,” said Derrick Chan, General Manager of Color & Additives Southeast Asia at Avient. Our expanding portfolio of offerings includes colorants, advanced composites, functional additives, engineered materials, and Dyneema®, the world’s strongest fiber™.

These reSound BIO TPEs have an opaque natural color and offer excellent colorability, just like prime TPEs. This tone allows the materials to showcase a natural aesthetic or be colored to match design specifications with traditional TPE colorants or sustainable color options from Avient. Brand owners continue to seek ways to be more environmentally responsible and these new bio-polymers were developed to help them achieve those goals,” said Matt Mitchell, director, global marketing, Specialty Engineered Materials at Avient.

BEREA, Ohio – PolyOne ColorMatrix, a global leader in liquid color and additives for plastics,has launched the PlanetPak™ liquid delivery system, the latest in its line of eco-friendly packaging solutions, helping customers reach their environmental goals. Easy to transport, handle and store, this packaging system improves material handling safety while still efficiently delivering the high quality colorant stored within it. PolyOne Corporation, with 2013 revenues of $3.8 billion, is a premier provider of specialized polymer materials, services and solutions.

EPIC Rio inks are PANTONE® approved, with an extended color range of 18 single pigment finished ink mixing components, which balance color accuracy, vibrancy and opacity for peak press performance and color design.  The matches to Pantone color standards are spot on. About PolyOne PolyOne Corporation, with 2016 revenues of $3.3 billion, is a premier provider of specialized polymer materials, services and solutions.