The Company does not provide reconciliations of forward-looking non-GAAP financial measures, such as outlook for adjusted EBITDA, adjusted earnings per share and free cash flow, to the most comparable GAAP financial measures on a forward-looking basis because the Company is unable to provide a meaningful or accurate calculation or estimation of reconciling items and the information is not available without unreasonable effort. Free cash flow conversion calculated as (EBITDA – Capex) / EBITDA Source: Bloomberg market data as of November 9, 2020 Median: 82% Median: 73% H I G H F R E E C A S H F LOW C O N V E R S I O N 83 86 85 85 80 78 58 88 83 81 79 77 76 73 73 72 72 67 64 63 60 6 A v ie n t K W R R P M P P G F U L A V Y G C P F M C IF F U N V R B N R E M N E C L C E H X L F O E A S H G R A H U N K R A S C L A L B Net Debt / 2021E EBITDA (1) We typically operate at 2.5–3.0x net debt to EBITDA. Leverage is calculated as Total Debt – Cash / EBITDA 2. 2020 Pro forma for the acquisition of the Clariant Masterbatch business Source: Bloomberg market data as of November 9, 2020 Median: 3.0x (2 ) Avient Specialty Formulators Other Chemical/Specialty Companies 2.9x 2.5x 0.4x 1.7x 1.7x 2.6x 3.1x 4.3x -0.2x 1.9x 2.2x 2.2x 2.3x 2.5x 2.7x 3.0x 3.3x 3.5x 3.7x 3.8x 4.3x 4.4x 5.8x A v ie n t (2 0 P F ) A v ie n t (2 1 E ) G C P P P G A V Y R P M K W R F U L S C L B N R F M C C E E C L A S H H U N E M N G R A IF F A L B U N V R H X L F O E K R A Median: 2.1x T H E C U R R E N T AV I E N T VA LUAT I O N D I S C O N N E C T 20 Our transformation and business model are still being understood, and as a result, we are currently trading at a discount to peer companies Our financial metrics are consistent with specialty formulator peers, yet our EBITDA multiple is at a 4.1x discount to peer companies Ongoing synergy capture is another value creation lever that is unique to Avient This creates a compelling investment opportunity Total Enterprise Value / 2021E EBITDA (1) Our current valuation implies an EBITDA multiple that is significantly below specialty formulator peers and our historic valuations, when the company had considerable exposure to more cyclical and challenging end markets.

The Company does not provide reconciliations of forward-looking non-GAAP financial measures, such as adjusted EPS and adjusted EBITDA, to the most comparable GAAP financial measures on a forward-looking basis because the Company is unable to provide a meaningful or accurate calculation or estimation of reconciling items and the information is not available without unreasonable effort. Below is a reconciliation of these non-GAAP financial measures to their most directly comparable financial measures calculated and presented in accordance with GAAP. Below is a reconciliation of these non-GAAP financial measures to their most directly comparable financial measures calculated and presented in accordance with GAAP.

The Company does not provide reconciliations of forward-looking non-GAAP financial measures, such as adjusted EPS and adjusted EBITDA, to the most comparable GAAP financial measures on a forward-looking basis because the Company is unable to provide a meaningful or accurate calculation or estimation of reconciling items and the information is not available without unreasonable effort. Below is a reconciliation of these non-GAAP financial measures to their most directly comparable financial measures calculated and presented in accordance with GAAP. Below is a reconciliation of these non-GAAP financial measures to their most directly comparable financial measures calculated and presented in accordance with GAAP.

When showing constant dollar figures on GAAP and non-GAAP financial measures, the foreign exchange impact is calculated by using current foreign exchange rates and applying them to the prior period results. Avient does not provide reconciliations of forward-looking non-GAAP financial measures, such as outlook for Adjusted EBITDA, Adjusted Earnings Per Share, Net Debt/Adjusted EBITDA and Free Cash Flow to the most comparable GAAP financial measures on a forward-looking basis because Avient is unable to provide a meaningful or accurate calculation or estimation of reconciling items and the information is not available without unreasonable effort. 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 20 22 SUSTAI NA BILI TY 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… STAKEHOLD ER INFLUENC E D RI VES D EMA ND 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 A P P E N D I X 24 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 RA W MATERI AL BA SKET PEER COMPARISONS AVI ENT I S ASSET LI GHT Capex / Revenue 2023E (%) Avient Specialty Formulators Other Specialty / Chemical Companies Source: Peer data per Bloomberg as of August 17, 2023 Note: Avient reflects 2023 estimated revenue of $3,280 and estimated run-rate CAPEX of $110M. 26 3 2 3 3 4 4 3 4 5 5 7 7 9 10 A vi e n t K W R P P G F U L A V Y R P M F M C H U N C E E C L A S H H X L E M N S C L FR EE CA SH FLOW CONV ER SION Source: Peer data per Bloomberg as of August 17, 2023 Note: Free cash flow conversion calculated as (Adjusted EBITDA – Capex) / Adjusted EBITDA.

When showing constant dollar figures on GAAP and non-GAAP financial measures, the foreign exchange impact is calculated by using current foreign exchange rates and applying them to the prior period results. Avient does not provide reconciliations of forward-looking non-GAAP financial measures, such as outlook for Adjusted EBITDA, Adjusted Earnings Per Share and Free Cash Flow to the most comparable GAAP financial measures on a forward-looking basis because Avient is unable to provide a meaningful or accurate calculation or estimation of reconciling items and the information is not available without unreasonable effort. vehicles to be 100% electric by 2032 Where Avient Wins:  Lightweight panels that establish both strength and stiffness resulting in decreased energy usage, lower emissions  Long-lasting Color applications to resist UV exposure, temperature fluctuations and exceed the stylistic requirements of global automakers 19 $130 $530 Q2 FY $0.60 $2.40 Q2 FY 2023 GUIDANCE 20 Sales Adjusted EBITDA $845 $3,400 Q2 FY Adjusted EPS (in millions) (in millions) CA SH FLOW / LEV ER AGE 21 • Maintaining free cash flow and leverage guidance from February earnings call • IT investment to further integrate acquired businesses and capture operational efficiencies • Restructuring actions to streamline operations and improve profitability, primarily in Europe ($ millions) 2023E Cash Flow from Operating Activities 350$ Less: Run-Rate CapEx (110) CapEx for IT System Upgrade (25) CapEx for Restructuring (15) Total CapEx (150) Free Cash Flow 200$ Adjusted EBITDA 530$ Net Debt / Adjusted EBITDA 2.9x LONG-TERM REVENUE GROWTH DRI VERS Growth Drivers Long-Term Growth Rate Sustainable Solutions 8–12% Healthcare 8–10% Composites 10% Asia / LATAM 5% Other (GDP growth) 2–3% Avient 6.5% 22 Sustainable Solutions 32% Asia / LATAM 15% Composites 8% Healthcare 6% Other (GDP Growth) 39% • Virtual presentation to be held September 20, 2023 • The company will be conducting an investor-focused presentation around our sustainability solutions portfolio Avient Confidential 23 SUSTAINABILITY INVESTOR DAY 23 $340M $405M $455M $550M $790M $915M 2016 2017 2018 2019 2020PF** 2021 2022PF*** SUSTA INAB ILITY F OR A BETTER TOMOR ROW Revenue From Sustainable Solutions* 2016-2022 ($ in millions) Organic Future Growth Revenue Assumptions From Sustainable Solutions: 8 - 12% 24 *Avient Sustainable Solutions definitions aligned with FTC 2012 Guide for the Use of Environmental Marketing Claims (“Green Guides”) **2020 is Pro Forma to include full year of the Clariant Color business ***2022 is Pro Forma for the acquisition of Avient Protective Materials and the divestiture of Distribution $1,175M Lightweighting Eco-Conscious Recycle Solutions VOC Reduction Sustainable Infrastructure Human Health & Safety Reduced Energy Use Bio-polymers SUSTA INAB ILITY NEEDS BY M ARKET B&C • Eco-Conscious • Carbon footprint • Resource conservation Healthcare • Carbon footprint • Bio based content • Eco-Conscious Automotive • Light weighting • Recycled Content • VOC reduction Consumer • Recycle Solutions • Light weighting • Carbon Footprint Packaging • Recycle Solutions • Light weighting • Food waste reduction Common Theme: CO2 Emission Goals Increasing Single-Use Plastic Regulation 25 I NV ESTI NG I N INNOVATI ON S U S T A I N A B I L I T Y P O R T F O L I O 26 A P P E N D I X 29 RAW MATERIAL 2022 ANNUAL PURCHASES 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 • Cost inflation decelerating, particularly for hydrocarbon-based raw materials 2022 pro forma results for the acquisition of Avient Protective Materials SEGMENT DATA U.S. & Canada 40% EMEA 37% Asia 18% Latin America 5% 2022 PRO FORMA SEGMENT, END MARKET AND GEOGRAPHY GEOGRAPHY REVENUESEGMENT FINANCIALS Consumer 20% Packaging 24% Industrial 15% Building and Construction 10% Telecommunications 4% Energy 4% Defense 6% END MARKET REVENUE $2,355M $402M $1,300M $272M Sales EBITDA Specialty Engineered Materials Color Additives and Inks $592M$3,653M (1) Transportation 9% Healthcare 8% 31 (1) Total company sales and adjusted EBITDA of $3,653M and $592M, respectively, include intercompany sales eliminations and corporate costs C O L O R , A D D I T I V E S & I N K S 2 0 2 2 R E V E N U E | $ 2 . 4 B I L L I O N US & Canada 34% EMEA 38% Asia 20% Latin America 8% END MARKET REGION 32 Packaging 34% Consumer 21% Healthcare 8% Industrial 15% Transportation 8% Building & Construction 11% Telecommunications 1% Energy 2% S P E C I A L T Y E N G I N E E R E D M A T E R I A L S 2 0 2 2 P R O F O R M A R E V E N U E | $ 1 . 3 B I L L I O N END MARKET US & Canada 52% EMEA 35% Asia 13% REGION 33 Packaging 5% Consumer 19% Healthcare 8%Industrial 16% Transportation 10% Telecommunications 10% Energy 9% Defense 15% Building & Construction 8% Packaging 32% Consumer 27% Healthcare 8% Industrial 14% Building & Construction 5% Telecommunications 3% Energy 1% Defense 1% Asia (18% of sales) Transportation 9% 2 0 2 2 P R O F O R M A AV I E N T R E G I O N A L S A L E S B Y E N D M A R K E T Packaging 27% Consumer 14% Healthcare 5% Industrial 17% Building & Construction 10% Energy 5% Defense 8% EMEA (37% of sales)Transportation 11% Packaging 13% Consumer 24% Healthcare 12% Industrial 15% Building & Construction 13% Energy 5% Defense 5% US & Canada (40% of sales) Transportation 7% Packaging 56% Consumer 23% Healthcare 4% Industrial 7% Building & Construction 4% Telecommunications 1% LATAM (5% of sales) Transportation 5% Telecommunications 3% Telecommunications 6% 34 PEER COMPARISONS AV I E N T I S A S SE T L I G H T Capex / Revenue 2023E (%) Avient Specialty Formulators Other Specialty / Chemical Companies Source: Peer data per Bloomberg as of May 31, 2023 Note: Avient reflects 2023 estimated revenue of $3,400 and estimated run-rate CAPEX of $110M. 36 3 2 3 3 4 4 3 3 4 5 5 6 8 9 A vi e n t K W R P P G F U L A V Y R P M F M C H U N C E H X L E C L A S H E M N S C L F R E E C A S H F LOW C O N V E R S I O N Source: Peer data per Bloomberg as of May 31, 2023 Note: Free cash flow conversion calculated as (Adjusted EBITDA – Capex) / Adjusted EBITDA.

The Company does not provide reconciliations of forward-looking non-GAAP financial measures, such as adjusted EPS and adjusted EBITDA, to the most comparable GAAP financial measures on a forward-looking basis because the Company is unable to provide a meaningful or accurate calculation or estimation of reconciling items and the information is not available without unreasonable effort. Below is a reconciliation of these non-GAAP financial measures to their most directly comparable financial measures calculated and presented in accordance with GAAP. Below is a reconciliation of these non-GAAP financial measures to their most directly comparable financial measures calculated and presented in accordance with GAAP.

The Company does not provide reconciliations of forward-looking non-GAAP financial measures, such as adjusted EPS and adjusted EBITDA, to the most comparable GAAP financial measures on a forward-looking basis because the Company is unable to provide a meaningful or accurate calculation or estimation of reconciling items and the information is not available without unreasonable effort. Below is a reconciliation of these non-GAAP financial measures to their most directly comparable financial measures calculated and presented in accordance with GAAP. Below is a reconciliation of these non-GAAP financial measures to their most directly comparable financial measures calculated and presented in accordance with GAAP.

Below is a reconciliation of these non-GAAP financial measures to their most directly comparable financial measures calculated and presented in accordance with GAAP. Below is a reconciliation of these non-GAAP financial measures to their most directly comparable financial measures calculated and presented in accordance with GAAP. Liquidity is calculated as follows:

The Company does not provide reconciliations of forward-looking non-GAAP financial measures, such as adjusted EPS and adjusted EBITDA, to the most comparable GAAP financial measures on a forward-looking basis because the Company is unable to provide a meaningful or accurate calculation or estimation of reconciling items and the information is not available without unreasonable effort. Below is a reconciliation of these non-GAAP financial measures to their most directly comparable financial measures calculated and presented in accordance with GAAP. Below is a reconciliation of these non-GAAP financial measures to their most directly comparable financial measures calculated and presented in accordance with GAAP.

Below is a reconciliation of these non-GAAP financial measures to their most directly comparable financial measures calculated and presented in accordance with GAAP. With respect to our forecasted results for full-year 2019 adjusted EPS, the Company does not provide a reconciliation of this forward-looking non-GAAP financial measure because it is not possible for the Company to provide a meaningful or accurate calculation or estimation of reconciling items and the information is not available without unreasonable effort. Below is a reconciliation of these non-GAAP financial measures to their most directly comparable financial measures calculated and presented in accordance with GAAP.