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 10% Dyestuffs 2% Polyethylene 11% Nylon 6% Polypropylene 5% Styrenic Block Copolymer 5% 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 Formulators Other Specialty / Chemical Companies Source: Peer data per Bloomberg as of July 21, 2023 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 A vi en t K W R P P G F U L R P M A V Y F M C H U N C E H X L E C L A S H E M N S C L FREE CASH FLOW CONVERSION Source: Peer data per Bloomberg as of July 21, 2023 Note: Free cash flow conversion calculated as (Adjusted EBITDA – Capex) / Adjusted EBITDA. We also monitor earnings (defined as net income from continuing operations) before interest, taxes, depreciation and amortization (EBITDA) and adjusted EBITDA (EBITDA before the impact of special items) as a supplement to our GAAP measures. Three Months Ended June 30, 2023 Three Months Ended June 30, 2022 Reconciliation to Condensed Consolidated Statements of Income $ EPS $ EPS Net income from continuing operations attributable to Avient shareholders $ 22.1 $ 0.24 $ 62.8 $ 0.68 Special items, after tax 19.6 0.21 3.2 0.03 Amortization expense, after-tax 16.2 0.18 $ 10.5 $ 0.12 Adjusted net income / EPS $ 57.9 $ 0.63 $ 76.5 $ 0.83 Three Months Ended June 30, Six Months Ended June 30, Reconciliation to EBITDA and Adjusted EBITDA: 2023 2022 2023 2022 Net income from continuing operations – GAAP $ 22.3 $ 62.8 $ 43.6 $ 127.5 Income tax expense 10.4 22.7 18.1 42.7 Interest expense, net 29.4 16.2 58.2 33.1 Depreciation and amortization 47.6 36.5 98.1 74.3 EBITDA from continuing operations $ 109.7 $ 138.2 $ 218.0 $ 277.6 Special items, before tax 21.7 0.9 49.0 7.6 Depreciation and amortization included in special items (0.1) (1.1) (1.9) (3.2) Adjusted EBITDA $ 131.3 $ 138.0 $ 265.1 $ 282.0 Pro forma APM adjustments — 34.3 — 66.3 Pro forma adjusted EBITDA $ 131.3 $ 172.3 $ 265.1 $ 348.3 Pro forma adjusted EBITDA as a % of sales 15.9 % 17.4 % 15.9 % 17.6 % 1 AVNT Q2 2023 Earnings Presentation 7.26.23 IR Deck - AVNT-2023.06.30 7.24 1217PM non GAAP attachment Attachment

where he helped to improve collaboration among as he helped to build our PP&S team and further refine the segment's strategy toward specialty.  news library online, please visit www.polyone.com/news

Ripple is responsible for leading initiatives that help customers and This new organization will be instrumental in bringing collective action and scale to help eliminate plastic waste from the environment.  news library online, please visit www.polyone.com/news

Clean, vibrant colors in both transparent and opaque options help set this line of high-temperature and high-performance colorants apart from other options. Our Transcend colorants help address all of these needs.” To access Avient's news library online, please visit www.avient.com/news

This new additive technology helps customers’ packaging products to comply with new titanium dioxide (TiO2) restrictions in Europe under the EU Waste Framework Directive 2008/98/EC. Commercially available in major regions around the world, new Lactra light blocking additive technology from Avient can help customers facing TiO2 restrictions comply with regulations without compromising performance. To access Avient’s news library online, please visit www.avient.com/news.  

Using the new bio-based Mevopur polymer solutions instead of conventional materials,” says Volker Dickfeld, senior marketing manager, healthcare global, “can help manufacturers of pharmaceutical packaging, medical devices and related products reduce their carbon footprint. And, because they are produced under Mevopur protocols, these polymer solutions also can help the manufacturers reduce their risk of regulatory non-compliance.” To access Avient’s news library online, please visit www.avient.com/news.

Geon HC 8200 series is formulated for improved chemical resistance to withstand repeated exposure to powerful disinfectants, which are increasingly used in the fight against healthcare-associated infections (HAIs), helping device manufacturers to reduce service calls, warranty claims and product returns. The PolyOne team works collaboratively with medical device manufacturers, offering a variety of support services, including part and mold design, manufacturing, agency approval, and other services to minimize the time and help manage the risks involved in bringing a new medical device to the market. To access PolyOne’s news library online, please go to www.polyone.com/news.

– PolyOne today announced a significant enhancement to existing thermoplastic elastomer (TPE) technology that will help products with nylon grips deliver superior resistance to oil and abrasion. Our new technology helps these grips to perform well under tough usage conditions over the life of the product.” To access PolyOne’s news library online, please go to www.polyone.com/news.

We have successfully helped carmakers transition from paint to MIC for many exterior applications such as skid plates and trims. Transitioning from paint to the use of MIC with Smartbatch FX helps manufacturers in the automotive, appliance, consumer goods and other industries create attractive, durable parts at reduced cost. To access PolyOne’s news library online, please go to www.polyone.com/news

Avient is committed to helping customers meet sustainability goals in various ways through its composites portfolio. Thermoplastic recycled-content composites can also support a circular economy and help customers further lessen their environmental footprint.   To access Avient's news library online, please visit www.avient.com/news.