Please complete, sign, date and return your proxy or voting instruction form, or submit your vote and proxy by telephone or over the Internet. On July 19, 2017, we completed the sale of our DSS business to Arsenal Capital Partners. In the event of a change of control, cash-settled performance units for which all performance periods are completed as of December 31, 2017 are valued at actual attainment, and cash-settled performance units for which all performance periods are not completed as of December 31, 2017 are valued at target attainment.

Please complete, sign, date and return your proxy or voting instruction forff m, or submit your vote and proxy by telephone or over the Internet. Upon completing this assessment, the Compensation Committee also determined that no “confliff cts of interest have been raised by the work perforff med by the Consultant.” In the event of a change of control, cash-settled performance units for which all perforff mance periods are completed as of December 31, 2016 are valued at actual attainment, and cash-settled performance units for which all perforff mance periods are not completed as of December 31, 2016 are valued at target attainment.

Please submit your vote and proxy by internet or telephone, or complete, sign, date and return your proxy card or voting instruction card.   Upon completing this assessment, the Compensation Committee also determined that no “conflicts of interest have been raised by the work performed by the Consultant.” In the event of a change of control, cash-settled performance units for which all performance periods are completed as of December 29, 2023 are valued at actual attainment, and cash-settled performance units for which all performance periods are not completed as of December 29, 2023 are valued at target attainment.

The coefficient of friction (COF) characterizes the degree of force required to move one surface across another — either from a complete stop (static friction) or when the surface is already moving (kinetic friction). Recut tool to obtain complete shutoff with minimum 0.002" (0.05 mm) interference into substrate Recut tool to obtain complete shutoff with minimum 0.002" (0.05 mm) interference into substrate

Nous sommes tous tenus de préparer et de tenir à jour des renseignements exacts et des dossiers complets. Vous devez vous assurer que tout rapport ou dossier que vous préparez est exact et complet et ne contient aucune entrée fausse ou trompeuse. De plus, ces paiements doivent être inscrits de manière exacte et complète dans les registres comptables à titre de dépenses d’entreprise.

Please submit your vote and proxy by internet or telephone, or complete, sign, date and return your proxy card or voting instruction card.   Upon completing this assessment, the Compensation Committee also determined that no “conflicts of interest have been raised by the work performed by the Consultant.” In the event of a change of control, cash-settled performance units for which all performance periods are completed as of December 29, 2023 are valued at actual attainment, and cash-settled performance units for which all performance periods are not completed as of December 29, 2023 are valued at target attainment.

The scenario analysis will be complete and reported on in next year’s CDP disclosure. Also in 2021, Avient completed 207 energy saving activities that cumulatively reduce yearly emissions by 5,500 MT CO2e, hence reducing the company exposure to commodity fluctuations and regulatory changes. SC1.2 (SC1.2) Where published information has been used in completing SC1.1, please provide a reference(s).

Dans le cas où l'Acheteur aura failli à une quelconque obligation de payer pendant plus de quinze (15) jours, le Vendeur pourra : (i) retarder l'expédition de tout produit commandé par l'Acheteur jusqu'à complet paiement ; et (ii) demander à l'Acheteur le paiement immédiat de tout produit supplémentaire commandé par l'Acheteur avant tout envoi. 6. Buyer will accept, as full and complete performance by Seller, deliveries in accordance with such determinations as Seller may make.

Unless otherwise stated, Adjusted Operating Income, Adjusted EBITDA and Adjusted EPS figures included in this presentation exclude the impact of special items as defined in our quarterly earnings releases. 2 0 2 1 P E R F O R M A N C E $80 $85 2020 2021 $0.52 $0.58 2020 2021 Q4 2021 PERFORMANCE ( T O TA L C O M PA N Y ) 4 Sales Adjusted Operating Income $997 $1,202 2020 2021 + 21% Adjusted EPS + 6% + 12% (in millions) (in millions) $308 $429 2020PF 2021 $1.93 $3.05 2020PF 2021 FULL YEAR 2021 PERFORMANCE ( T O TA L C O M PA N Y ) 5 Sales Adjusted Operating Income $3,783 $4,819 2020PF 2021 + 27% Adjusted EPS + 39% + 58% (in millions) (in millions) (1) Financial information is pro forma to include a full year of Clariant Color business (1) (1) (1) FULL YEAR 2021 SEGMENT PERFORMANCE 6 CAI $2,043 $2,402 Sales ($ in millions) SEM Distribution $226 $303 Operating Income + 18% + 34% $1,110 $1,631 Sales $70 $93 Operating Income + 47% + 33% (1) $709 $919 Sales $94 $132 Operating Income + 30% + 40% (1) Financial information is pro forma to include a full year of Clariant Color business (1) Full Year 2020 (Pro forma) $3,783 $308 Sustainable Solutions 147 19% 60 Healthcare 143 28% 30 Composites 58 43% 29 Growth in Asia / LATAM 107 21% 26 Other 543 30% 58 Sub-total $4,781 26% $511 Wage Inflation and Overtime (39) Other Supply Chain Costs (15) COVID Response Applications (22) (12) Synergies 44 FX, Incentives, Other Employee Costs 60 (60) Full Year 2021 $4,819 27% $429 FULL YEAR 2021 SALES AND OPERATING INCOME ( T O TA L C O M PA N Y ) 7 Sales Growth Rate Adjusted Operating Income$ millions (1) Financial information is pro forma to include a full year of Clariant Color business (1) Adjusted EBITDA 8 Full Year 2020 (Pro forma) $ 457 Demand 135 $ millions CAI: Price / Mix 158 Inflation (120) SEM: Price / Mix 84 Inflation (65) Distribution: Price / Mix 318 Inflation (304) Net Price Benefit 71 Wage Inflation and Overtime (39) Other Supply Chain Costs (15) COVID Response Applications (12) Synergies 44 Incentives, FX, Other Employee Costs (60) Full Year 2021 $ 581    (1) Financial information is pro forma to include a full year of Clariant Color business (1) • Demand impact driven by growth in key focus areas: sustainable solutions, healthcare, composites and growth in Asia / LATAM • Price increases more than offset raw material and supply chain impacts FULL YEAR 2021 EBITDA BRIDGE SPECIALTY EBITDA MARGIN EXPANSION 9 CAI (1) 2018-2020 financial information is pro forma to include a full year of Clariant Color business 15.3% 15.2% 16.2% 17.0% 2018 2019 2020 2021 14.8% 15.2% 17.6% 17.8% 2018 2019 2020 2021 (1) SEM • Record margins in 2021 despite unprecedented supply chain challenges • Continued portfolio transformation to high-growth end markets and sustainable solutions • Clariant Color synergy realization • Investments in composites and outdoor high performance applications drove growth and mix improvements • Acquisition of Clariant Color business significantly expanded presence in healthcare, packaging and consumer end markets • Strength of portfolio – double-digit annual EBITDA growth since acquisition • $54 million of synergies realized in 2021 • Acquisition completed on July 1, 2020 for $1.45 billion. Our free cash flow supports shareholder value creation through investing in R&D for organic growth, completing bolt-on acquisitions, and returning cash to shareholders via our dividend program and opportunistic share repurchases. 27 1.

Operating Income $3,783 $4,300 2020PF 2021E Adjusted EPS (1) Financial information is pro forma to include a full year of Clariant Masterbatch business acquisition Previous Guidance Current Guidance $3,783 $4,650 2020PF 2021E $308 $410 2020PF 2021E $308 $430 2020PF 2021E $1.93 $2.80 2020PF 2021E $1.93 $3.00 2020PF 2021E (1) (1)(1) (1)(1) (1) (in millions) (in millions) $442 $457 $580 2019PF 2020PF 2021E $1.74 $1.93 $3.00 2019PF 2020PF 2021E FULL YEAR 2019 – 2021 ORGANIC GROWTH ( T O TA L C O M PA N Y ) 16 Sales Adjusted EBITDA $3,981 $3,783 $4,650 2019PF 2020PF 2021E + 17% Adjusted EPS (1) Financial information is pro forma to include a full year of Clariant Masterbatch business acquisition (1) (1) (in millions) (in millions) (1)(1) + 31% + 72% (1) (1) ($ in millions) 2021E Adjusted EBITDA 580$ Free Cash Flow 280$ Total Debt 1,860 Less: Cash (755) Net Debt 1,105$ 2021E Net Debt / Adjusted EBITDA 1.9x 17 BA L A N C E S H E E T • Acquisition of Magna Colours completed on July 1 – expands sustainable solutions portfolio through water-based inks technology • Deleveraging to 1.9x net debt to adjusted EBITDA by the end of 2021 • Driven by record adjusted EBITDA performance and strong free cash flow generation from asset light business • Future cash deployment: M&A, opportunistic share repurchases and balance sheet / continued leverage reduction 3.5x 2.7x 1.9x 2019PF 2020PF 2021E Net Debt / Adjusted EBITDA (1) (1) (1) Financial information is pro forma to include a full year of Clariant Masterbatch business acquisition S U S TA I NA B I L I T Y F O R A B ET T E R TO M O R ROW 18 • Revenue from sustainable solutions expected to grow 14% in 2021 as our innovation efforts and collaboration with customers continues to accelerate • Investments centered around innovation and global sustainability megatrends o Enabling a circular economy – Technologies that allow for increased use of post-consumer recycled (PCR) material and improve recyclability of plastics o Light-weighting – Composites and CAI applications to reduce weight and material requirements, which minimize energy and carbon emissions o Eco-Conscious – Health and human safety applications as well as Avient’s alternative materials to replace lead, PVC, halogens, BPA and other less eco-friendly options 18 2016 2017 2018 2019 2020PF** Bio-polymers Reduced Energy Use Human Health & Safety Sustainable Infrastructure VOC Reduction Recycle Solutions Eco-Conscious Lightweighting Revenue From Sustainable Solutions* 2016-2020 $405M $455M *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 Masterbatch business $340M $550M $790M 18 19 Key Updates • Includes Clariant Masterbatch performance • Increases disclosures and ESG data • Provides performance updates on 2030 Sustainability Goals • Commits to operational carbon neutrality in 2050 and 100% renewable energy by 2050 (RE 100) • Announces Avient’s participation in U.N. Our free cash flow supports shareholder value creation through investing in R&D for organic growth, completing bolt-on acquisitions, and returning cash to shareholders via our dividend program and opportunistic share repurchases. 24 1.