A recording of the webcast and the slide presentation will be available at avient.com/investors/events-presentations immediately following the conference call and will be accessible for one year. Our expanding portfolio of offerings includes colorants, advanced composites, functional additives, engineered materials, and Dyneema®, the world's strongest fiber™.

Advanced Composites Year Year

Advanced Mobility Composite Structures OnColor™ WPC Wood Plastic Composite Capstock Technology Wood Plastic Composite Substrate, Cellular Substrate Deck & Rail, Capstock for Deck / Rail / Fence

Additionally, Adjusted EPS excludes the impact of special items and amortization expense associated with intangible assets. 3 AVIENT OVERVIEW OUR VISION: Creating specialized and sustainable materials solutions that transform customer challenges into opportunities, bringing new products to life for a better world 2023 Financial ResultsCompany Overview Revenue By: 9,300 Employees 102 Manufacturing Sites 20,000+ Customers Key Highlights  Premier formulator of specialized and sustainable materials solutions  Asset-light business model, with flexibility to adapt to customer needs  Best-in-class technology and service (140+ PhDs / 2,500+ patents)  History of transformation through successful M&A while consistently returning cash to shareholders  Poised for continued future growth in excess of GDP $3.14B Revenue $2.36 $502M Adjusted EBITDA 16.0% Adjusted EBITDA Margins $186M Adjusted Free Cash Flow Over $1B in share buybacks since 2011 Raised dividend for 13 consecutive years, a 15% CAGR since 2011 U.S. & Canada 64% Specialty Engineered Materials Color Additives and Inks 23% 10% 5% 4% Building & Energy Telecom Geography Segment Industry 4 CREATING A WORLD-CLASS SUSTAINABLE ORGANIZATION 1. 6% annualized long term sales growth leveraging sustainable solutions, composites, healthcare and emerging regions 2. ASHISH KHANDPUR PRESIDENT & CEO 7 8 PORTFOLIO TRANSFORMATION 8 46% 66% 87% 100% 0% 20% 40% 60% 80% 100% 2005 2010 2015 2020 2023 % o f A dj us te d EB IT D A Commodity JVs Distribution Performance Products & Solutions Specialty Businesses Adjusted EBITDA from Specialty Applications SUSTAINABILITY AS A GROWTH DRIVER 9 LONG-TERM REVENUE GROWTH DRIVERS Sustainable Solutions Composites, Healthcare, Asia / LATAM Overlap Other 60%+ Key Growth Drivers Total Company Revenue Growth Drivers Long-Term Growth Rate Sustainable Solutions 8–12% Composites 8–10% Healthcare 8–10% Asia / LATAM 5% Other 0–2% Avient 6% END MARKET OBSERVATIONS (% OF COMPANY SALES) ENERGY DEFENSE TELECOMMUNICATIONS HEALTHCARE 10 TRANSPORTATION INDUSTRIAL BUILDING & CONSTRUCTION 9% CONSUMER PACKAGING 23% 11 REGIONAL OBSERVATIONS (% OF COMPANY SALES) 11 Q 4 2023 RE S U LT S Q4 2023 PERFORMANCE VS. Prior Year 14 Q4 2023 PERFORMANCE VS.

As the year continued, many countries made progress in the battle against COVID-19 with infection rates declining significantly and life returning to a more normal “pre-COVID” environment. Partially offsetting the lower asset returns was an increase in our year end discount rate from 2.69% to 4.74%. Partially offsetting the lower asset returns was an increase in our year end discount rate from 2.47% to 2.69%.

CASE STUDY: GORDON COMPOSITES™ VIBRATORY CONVEYOR SPRINGS Challe nge Accepted. COMPOSITE SPRINGS SHAKE UP THE STATUS QUO MANUFACTURER GAINS PERFORMANCE AND SHEDS COST WITH ADVANCED COMPOSITES © 2021, All Rights Reserved Avient Corporation, 33587 Walker Road, Avon Lake, Ohio USA 44012 To learn more, please contact Avient at 1.844.4AVIENT (1.844.428.4368) or visit www.avient.com/composites. Drawing on over 65 years of composite expertise in manufacturing high performance archery bow limbs - which require consistent, deep deflection under high loads each time the bowstring is pulled - the Gordon Composites team has translated this technology into continuous fiber reinforced composite springs that are specifically engineered to meet the rigorous demands of vibratory conveyors.

Distribution exceeded $1 billion in revenue for the second consecutive year and delivered a 5.9 percent return on sales in 2013. Glasforms), a leading manufacturer of glass and carbon fiber reinforced polymers and advanced composite products. Our customer returns are immaterial.

Partially offsetting the lower asset returns was an increase in our year end discount rate from 2.47% to 2.69% Partially offsetting the lower asset returns was an increase in our year end discount rate from 2.47% to 2.69%. Partially offsetting the higher asset returns was the decrease in our year end discount rate from 4.11% to 3.19%.

Sign, date and return your proxy card and/or voting instruction card to vote by mail. Key 2021 Company Performance Results and Return to Shareholders. We suggest that all proposals be sent by certified mail, return receipt requested.

AVIENT OVERVIEW OUR VISION: Creating specialized and sustainable material solutions that transform customer challenges into opportunities, bringing new products to life for a better world 2023 Financial GuidanceCompany Overview 2022 Pro Forma Revenue By: 9,700 Employees 104 Manufacturing Sites 20,000+ Customers Key Highlights  Premier formulator of specialized and sustainable material solutions  Asset-light business model, with flexibility to adapt to customer needs  Best-in-class technology and service (140+ PhDs / 2,500+ patents)  History of transformation through successful M&A while consistently returning cash to shareholders  Poised for continued future growth in excess of GDP $3.4B Revenue $2.40 $530M Adjusted EBITDA 15.6% Adjusted EBITDA Margins $200M Free Cash Flow 2.9x Net Leverage Over $1B in share buybacks since 2011 Raised dividend for 12 consecutive years, a 16% CAGR since 2011 Geography Segment Industry U.S. & Canada 64% 36% Specialty Engineered Materials Color Additives and Inks 37% 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. Chamber of Commerce; BEAD refers to Broadband Equity, Access, and Deployment Program17 • Fiscal Year 2024 U.S. Avient 2011 and 2018 valuations reflect trailing 12 months EBITDA at December 31 of the respective years. 38 EV / 2023E EBITDA Historic Multiple 6.5 8.3 9.6 13.2 13.0 12.8 11.3 8.6 17.9 16.8 10.7 8.8 8.8 8.7 7.5 6.9 01 1) 01 8) 02 3) 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.