TYPICAL PROPERTIES Sample thickness 0.25 in/6.35mm TEMPERATURE FLEXURAL STRENGTH ASTM D790 FLEXURAL MODULUS ASTM D790 °F °C ksi MPa msi GPa -60 -51 173 1193 5.00 34.48 70 21 155 1069 5.11 35.23 160 71 138 952 5.04 34.75 250 121 110 758 4.70 32.41 300 149 78 538 4.22 29.10 -60 -51 176 1211 5.64 38.92 70 21 143 989 5.36 36.98 160 71 120 824 5.57 38.41 250 121 61 423 4.82 33.24 -60 -51 163 1125 4.19 28.88 70 21 120 824 3.85 26.51 160 71 86 595 3.83 26.44 250 121 40 274 3.19 22.00 G la ss /E po xy H ig h Te m p Ep ox y/ G la ss G la ss /V in yl E st er MECHANICAL PERFORMANCE TESTING NOTES Springs were fatigue tested at 4 hz in a cantilevered loading.

Sanders Senior Vice President, General Counsel, Secretar y and Corporate Ethics Officer Leslie M.

In 2019, Avient associates completed over 30,000 hours of training through these various deliver y methods. Management and monitoring these global inventor y changes and other emerging issues by our regional product stewardship experts ensures a quick evaluation and response to potential regulator y risks. However, these regulator y changes/risks often drive opportunity for sustainable replacement initiatives, for which Avient is well positioned.

In 2019, Avient associates completed over 30,000 hours of training through these various deliver y methods. Management and monitoring these global inventor y changes and other emerging issues by our regional product stewardship experts ensures a quick evaluation and response to potential regulator y risks. However, these regulator y changes/risks often drive opportunity for sustainable replacement initiatives, for which Avient is well positioned.

Si l'action appartient à des nus-propriétaires et usufruitiers, tous les droits y afférents, y compris le droit de vote, seront exercés par les usufruitiers. (...)

All Rights Reserved 2024 25 Strong and committed team leading the change Leslie Sequeira Chief Information Officer Jamie Beggs SVP and Chief Financial Officer Joel Rathbun SVP Mergers & Acquisitions Woon Keat Moh SVP and President Color, Additives and Inks Chris Pederson SVP and President Specialty Engineered Materials Amy Sanders SVP, General Counsel and Secretary Kyle Rose VP, Corporate Communications John Midea SVP, Global Ops and Process Improvement NEW NEW Kristen Gajewski SVP and Chief Human Resources Officer A L S O H E R E T O D A Y Phil Clark SVP and Chief Technology Officer NEW A L S O H E R E T O D A Y Mike Irwin SVP, New Business Development and Marketing Excellence NEW Color, Additives and Inks SEGMENT STRATEGIC REVIEW Woon Keat Moh AVIENT INVESTOR DAY December 4, 2024 Copyright © .

Normal manufacturing processes are “dr y” and water use is limited to sanitar y applications and process cooling, with closed loop recycling processes cooling dominating. Environmental Protection Agency’s (EPA) Toxic Substance Control Act (TSCA) inventor y reset rule. Management and monitoring these global inventor y changes and other emerging issues by our regional product stewardship experts ensures a quick evaluation and proactive response to potential regulator y risks.

PRIOR YEAR $790 $710 2022 2023 $107 $112 2022 2023 Sales Adjusted EBITDA (in millions) $0.42 $0.47 2022 PF 2023 Adjusted EPS (in millions) - 10% + 5% + 12% Sales Adjusted EBITDA Adjusted EPS 12 $112 $500 Q4 FY $0.47 $2.30 Q4 FY Q4 AND FULL YEAR 2023 GUIDANCE $710 $3,130 Q4 FY Sales Adjusted EBITDA Adjusted EPS 13 (in millions) (in millions) Guidance: Free Cash Flow $180 $180 Prior Guidance Guidance FREE CASH FLOW & INCREASED DIVIDEND 13th Consecutive Dividend Increase 0.16 0.26 0.42 0.58 0.79 0.85 0.99 1.03 2011 2013 2015 2017 2019 2021 2023 2024 14 S U S T A I N A B I L I T Y D AY R E C A P SUSTAINABILITY AS A GROWTH DRIVERLONG-TERM REVENUE GROWTH DRIVERS 60%+ Key Growth Drivers Sustainable Solutions Composites, Healthcare, Asia / LATAM Overlap Other (GDP Growth) Total Company Revenue Growth Drivers Long-Term Growth Rate Sustainable Solutions 8–12% Composites 8–10% Healthcare 8–10% Asia / LATAM 5% Other (GDP growth) 0–2% Avient 6% 17 SUSTAINABILITY TRENDS DRIVE LONG-TERM GROWTH 8-12% Long Term Growth 50 90 2022 2030 Medical Plastics Market Size (in $Billions) 2020 2030 Recycled Plastics Virgin Plastics Growing Demand for Recycled Content Avient Sustainable Solutions 18 46 2023 2032 Global Offshore Annual Wind Installations (in Gigawatts) Sources: McKinsey, Bloomberg, Grand View Research SUSTAINABILITY TRENDS DRIVE LONG-TERM GROWTH 18 • Transformative acquisitions combined with divestitures of more cyclical businesses have improved margins over 400 bps since 2018 • 20% long-term margin goal to be driven by key growth drivers, with sustainable solutions playing a meaningful role 5.4% 11.5% 16.0% 2006 2018 2023E Recovery Growth Drivers Strategic Objective 20%+ +1%+ +3%+ ADJUSTED EBITDA MARGIN EXPANSION 19 • 6% annualized long-term sales growth leveraging sustainable solutions, composites, healthcare, and emerging regions • Expand EBITDA margins to 20% • Deliver annual EBITDA and EPS growth of 10% and 15% • Maintain asset-light, 80% free cash flow conversion profile and be valued as a specialty formulator • Continue fostering our Great Place to Work® culture CRE AT ING A WORL D-CL AS S S US TAINABL E ORGANIZ AT ION 20 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.

& Canada 41% EMEA 36% Asia 18% Latin America 5% 2023 SEGMENT, END MARKET AND GEOGRAPHY GEOGRAPHY REVENUESEGMENT FINANCIALS Consumer 19% Packaging 23%Industrial 16% Building and Construction 9% Telecommunications 4% Energy 5% Defense 7% END MARKET REVENUE $2,007M $358M $1,138M $224M Sales EBITDA Specialty Engineered Materials Color Additives and Inks $502M$3,143M (1) Transportation 10% Healthcare 7% 20 (1) Total company sales and adjusted EBITDA of $3,143M and $502M, respectively, include intercompany sales eliminations and corporate costs 2 0 2 3 R E V E N U E | $ 2 . 0 B I L L I O N US & Canada 34% EMEA 37% Asia 21% Latin America 8% END MARKET REGION 21 Packaging 34% Consumer 21% Healthcare 8% Industrial 15% Transportation 9% Building & Construction 10% Telecommunications 1% Energy 2% COLOR , AD DI TI VES & INKS 2 0 2 3 R E V E N U E | $ 1 . 1 B I L L I O N US & Canada 52% EMEA 35% Asia 13% 22 Packaging 5% Consumer 16% Healthcare 6%Industrial 16% Transportation 12% Telecommunications 9% Energy 10% Defense 18% Building & Construction 8% END MARKET REGION SPEC IA LTY ENGI NEER ED MATERI ALS Packaging 32% Consumer 26% Healthcare 9% Industrial 13% Building & Construction 6% Telecommunications 2% Energy 2% Defense 1% Asia (18% of sales) Transportation 9% 2 0 2 3 AV I E N T R E G I O N A L S A L E S Packaging 25% Consumer 13% Healthcare 5% Industrial 18% Building & Construction 9% Energy 5% Defense 8% EMEA (36% of sales)Transportation 13% Packaging 13% Consumer 22% Healthcare 10% Industrial 16% Building & Construction 12% Energy 6% Defense 8% US & Canada (41% of sales) Transportation 9% Packaging 59% Consumer 22% Healthcare 2% Industrial 8% Building & Construction 4% LATAM (5% of sales) Transportation 5% Telecommunications 4% Telecommunications 4% 23 B Y E N D M A R K E T 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.

FIGURE 11 - Non-Structural Hole Design Guidelines B = 2W = 2W = 2W FIGURE 12 - Non-structural hole design guidelines FIGURE 13 - Snap Fit Design Guidelines Y 1 y= ε=l2 1.5t1 1 y= ε=l2 K 1.5t12 “K” is found from graph based on t 2 /t 1 .