Avient Stock Performance The following is a graph that compares the cumulative total shareholder returns for Avient’s common shares, the S&P 500 index and the S&P Mid Cap Chemicals index, with dividends assumed to be reinvested when received. The S&P Mid Cap Chemicals index includes a broad range of chemical manufacturers. Because of the relationship of Avient’s business within the chemical industry, comparison with this broader index is appropriate.

For 2018, our Vitality Index was 35%, a testament to our innovation capability and a sign of confi dence to our customers. PolyOne Stock Performance The following is a graph that compares the cumulative total shareholder returns for PolyOne’s common shares, the S&P 500 index and the S&P Mid Cap Chemicals index, with dividends assumed to be reinvested when received. The S&P Mid Cap Chemicals index includes a broad range of chemical manufacturers.

Q 2 2 0 2 1 P E R F O R M A N C E U P D AT E $69 $122 2020PF 2021 $0.42 $0.87 2020PF 2021 Q2 2021 – ORGANIC PERFORMANCE ( T O TA L C O M PA N Y ) 10 Sales Adjusted Operating Income $870 $1,235 2020PF 2021 + 42% Adjusted EPS + 77% + 107% (in millions) (in millions) (1) (1) (1) (1) Financial information is pro forma to include a full year of Clariant Masterbatch business acquisition Q2 2021 SEGMENT PERFORMANCE 11 CAI $488 $624 Sales ($ in millions) SEM Distribution $54 $86 Operating Income +28% +59% $239 $404 Sales $15 $24 Operating Income +69% +60% (1) $159 $241 Sales $17 $37 Operating Income +52% +118% (1) (1) Financial information is pro forma to include a full year of Clariant Masterbatch business acquisition SPECIALTY EBITDA MARGIN EXPANSION 12 CAI (1) 2018-2020 financial information is pro forma to include a full year of Clariant Masterbatch business acquisition 15.3% 15.2% 16.2% 18.5% 2018 2019 2020 YTD 2021 14.8% 15.2% 17.6% 19.1% 2018 2019 2020 YTD 2021 (1) SEM • Continued portfolio transformation to high-growth end markets and sustainable solutions • Clariant Masterbatch synergy realization • Investments in composites and outdoor high performance applications drive growth and mix improvements CAI EBITDA MARGIN EXPANSION 13 Legacy CAI 18.9% 18.9% 20.3% 2019 2020 YTD 2021 Legacy Clariant MB 11.9% 13.8% 16.8% 2019 2020 YTD 2021 • Synergy capture translating to the bottom line • Positive mix with growth in healthcare, consumer and packaging end-markets • World-class vitality index of 35% represents sales from products introduced in the last five years.

Garratt Senior Vice President, President of Performance Products & Solutions John Midea Senior Vice President, Global Operations & Process Improvement Mark Crist Senior Vice President, President of PolyOne Distribution Cathy Dodd Vice President, Marketing Chris Murphy Vice President, Research & Development, Chief Innovation Officer Kurt Schuering Vice President, Global Key Account Management The Leaders Behind the Team PolyOne Corporation Page 8 Commodity to Specialty Transformation • Volume driven, commodity producer • Heavily tied to cyclical end markets • Performance largely dependent on non- controlling joint ventures 2000-2005 2006 - 2009 2010 – 2014 2015 and beyond • Steve Newlin appointed, Chairman, President and CEO • New leadership team appointed • Implementation of four pillar strategy • Focus on value based selling, investment in commercial resources and innovation to drive transformation • Substantial EPS growth from $0.13 to all-time high of $1.80 • Shift to faster growing, high margin, less cyclical end markets • Key acquisitions propel current and future growth, as well as margin expansion • Specialty mix expands to 65% of Operating Income – strongest mix of earnings in history • Accelerating growth • Deliver consistent double digit annual EPS growth • Maintain >35% vitality index • Pursue strategic acquisitions that expand specialty offerings and geographic breadth • Invest and grow current and next generation talent PolyOne Corporation Page 9 2006 2014 “Where we were” “Where we are” Operating Income % Specialty: Global Color, Additives & Inks 1.7% 14.7% Global Specialty Engineered Materials 1.1% 12.1% Designed Structures & Solutions 1.4%(2012) 7.3% Performance Products & Solutions 5.5% 7.7% Distribution 2.6% 6.1% Specialty Platform % of Operating Income 6.0% 65% ROIC 5.0% 11.3% Adjusted EPS Growth N/A 37% Proof of Performance PolyOne Corporation Page 10 2% 34% 43% 62% 65% 0% 20% 40% 60% 80% 100% 2005 2008 2010 2013 2014 % o f O pe ra tin g In co m e* JV's Performance Products & Solutions Distribution Specialty Old PolyOne Mix Shift Highlights Specialty Transformation New PolyOne Transformation Specialty OI $5M $46M $87M $195M $242M *Operating Income excludes corporate charges and special items PolyOne Corporation Page 11 2014 2015 Target “Where we are” (Est. in 2012) Operating Income % Specialty: Global Color, Additives & Inks 14.7% 12 – 16% Global Specialty Engineered Materials 12.1% 12 – 16% Designed Structures & Solutions 7.3% 8 – 10% Performance Products & Solutions 7.7% 9 – 12% Distribution 6.1% 6 – 7.5% Specialty Platform % of Operating Income 65% 65 – 75% ROIC 11.3% 15% Adjusted EPS Growth 37% Double Digit Expansion Proof of Performance PolyOne Corporation Page 12 • Sold non-core resin assets – EPS dilutive • Completed acquisition of Spartech • Housing starts below 1.25 million units Single family units 30% below expectations • Longstanding weakness in Europe, and decline in Euro Successfully Navigating Change Since 2012 PolyOne Corporation Page 13 -100% 0% 100% 200% 300% 400% 500% 600% POL S&P 500 Strategy and Execution Drive Results $0.12 $0.27 $0.21 $0.13 $0.68 $0.82 $1.00 $1.31 $1.80 '06 '07 '08 '09 '10 '11 '12 '13 '14 ‘06-‘14 Adjusted EPS CAGR = 40% Adjusted EPS Share Price vs.

Their efforts were instrumental in our achievement of earning the distinction of a “Best Place to Work” on the Corporate Equality Index with a perfect score of 100% in 2020 and 2021. PROXY SUMMARY 8 PROXY STATEMENT 2022 | Annual Meeting of Shareholders Another excellent measurement of our innovation performance is our Vitality Index, which represents Company revenue from products that have been in our portfolio for less than five years. For 2021, our Vitality Index reached 36%, validating the strength of our technology portfolio.

Avient Stock Performance The following is a graph that compares the cumulative total shareholder returns for Avient’s common shares, the S&P 500 index and the S&P Mid Cap Chemicals index, with dividends assumed to be reinvested when received. The S&P Mid Cap Chemicals index includes a broad range of chemical manufacturers. Because of the relationship of Avient’s business within the chemical industry, comparison with this broader index is appropriate.

Avient Stock Performance The following is a graph that compares the cumulative total shareholder returns for Avient’s common shares, the S&P 500 index and the S&P Mid Cap Chemicals index, with dividends assumed to be reinvested when received. The S&P Mid Cap Chemicals index includes a broad range of chemical manufacturers. Because of the relationship of Avient’s business within the chemical industry, comparison with this broader index is appropriate.

Entitled to incentive Type of incentive Activity inventivized Comment Board/Executive board Monetary reward Emissions reduction target Energy reduction target Behavior change related indicator Company performance against a climate- related sustainability index All employees Monetary reward Emissions reduction project Energy reduction project Efficiency project We celebrate, reward and share our associates’ great work through our global recognition programs. Publication In voluntary communications Status Complete Attach the document Avient_Sustain_2020_for CDP.pdf Page/Section reference About us, Planet, Performance, Metrics and Index sections Content elements Governance Strategy Risks & opportunities Emissions figures Emission targets Comment Publication In mainstream reports Status Complete Attach the document 2030-goals.pdf Page/Section reference Pg. 1 Avient CDP Climate Change Questionnaire 2021 Tuesday, August 3, 2021 83 Content elements Emission targets Comment Publication Other, please specify EcoVadis report Status Complete Attach the document 20201113_Avient EcoVadis CSR Questionnaire.pdf 20201113_Avient EcoVadis CSR Questionnaire.pdf Page/Section reference Pgs. 1-67 Content elements Governance Strategy Risks & opportunities Emissions figures Emission targets Other metrics Comment C15.

Entitled to incentive Type of incentive Activity incentivized Comment Board/Executive board Monetary reward Emissions reduction target Energy reduction target Behavior change related indicator Company performance against a climate- related sustainability index All employees Monetary reward Emissions reduction project Energy reduction project Efficiency project We celebrate, reward and share our associates’ great work through our global recognition programs. Publication In mainstream reports Status Complete Attach the document Avient 2022 Proxy Statement.pdf Page/Section reference Pg. 4, 30 Content elements Governance Strategy Emissions figures Emission targets Comment 2022 Annual Proxy Statement Publication In voluntary sustainability report Status Complete Attach the document Avient 2022 Proxy Statement.pdf Page/Section reference About us, Planet, Performance, Metrics and Index sections Content elements Governance Strategy Risks & opportunities Emissions figures Avient CDP Climate Change Questionnaire 2022 Friday, July 29, 2022 118 Emission targets Comment CSR report Publication Other, please specify EcoVadis report Status Complete Attach the document 2022 EcoVadis Questionnaire_Avient.pdf Page/Section reference Pgs. 1-83 Content elements Governance Strategy Risks & opportunities Emissions figures Emission targets Comment EcoVadis report C15.

4) For purposes of this pay versus performance disclosure, our peer group is the S&P 400 Chemicals index (the "Peer Group").