All Rights Reserved 2025 17 Reconciliation of Non-GAAP financial measures Senior management uses comparisons of adjusted net income attributable to Avient common shareholders and diluted adjusted earnings per share (EPS) attributable to Avient common shareholders, excluding special items, to assess performance and facilitate comparability of results. Reconciliation to condensed consolidated statements of income Three months ended Sep 30, 2025 2024 $ Millions EPS (in $) $ Millions EPS (in $) Net income attributable to Avient common shareholders 32.6 0.36 38.2 0.41 Special items, after-tax 15.7 0.17 6.6 0.07 Amortization expense, after-tax 15.9 0.17 15.0 0.16 Adjusted net income / EPS 64.2 0.70 59.8 0.65 Per share amounts may not recalculate from figures present herein due to rounding 11 1 Reconciliation to EBITDA and Adjusted EBITDA Three months ended Sep 30, Nine months ended Sep 30, 2025 2024 2025 2024 $ Millions $ Millions $ Millions $ Millions Net income – GAAP 32.8 38.7 66.4 122.2 Income tax expense 10.1 11.3 20.8 39.3 Interest expense, net 24.2 26.9 75.8 80.1 Depreciation & amortization 46.9 45.1 138.8 134.3 EBITDA 114.0 122.0 301.8 375.9 Special items, before tax 19.4 9.7 127.9 44.0 Interest expense included in special items — (1.3) (2.0) (2.3) Depreciation & amortization included in special items (0.5) (0.4) (1.2) (1.2) Adjusted EBITDA 132.9 130.0 426.5 416.4 Adjusted EBITDA as a percent of sales 16.5% 15.9% 17.1% 16.7% PAGE 1 OF 3 Copyright © . All Rights Reserved 2025 18 Reconciliation of Non-GAAP financial measures Reconciliation to EBITDA and Adjusted EBITDA Three months ended Sep 30, 2025 2024 $ Millions $ Millions Sales Color, Additives and Inks 509.9 521.5 Specialty Engineered Materials 297.7 294.6 Corporate (1.1) (0.9) Sales 806.5 815.2 Operating income Color, Additives and Inks 73.8 75.5 Specialty Engineered Materials 37.3 36.4 Corporate (44.0) (34.7) Operating income 67.1 77.2 Depreciation and Amortization Color, Additives and Inks 22.6 21.9 Specialty Engineered Materials 22.0 20.7 Corporate 2.3 2.5 Depreciation and amortization 46.9 45.1 EBITDA Earnings before interest, taxes, depreciation and amortization Color, Additives and Inks 96.4 97.4 Specialty Engineered Materials 59.3 57.1 Corporate (41.7) (32.2) Other expense, net — (0.3) EBITDA 114.0 122.0 Special items, before tax 19.4 9.7 Interest expense included in special items — (1.3) Depreciation and amortization included in special items (0.5) (0.4) Adjusted EBITDA 132.9 130.0 Adjusted EBITDA as a percent of sales Color, Additives and Inks 18.9% 18.7% Specialty Engineered Materials 19.9% 19.4% PAGE 2 OF 3 Copyright © .

OnColor™ Brilliant Metallic Colorants OnColor™ Brilliant Metallic Colorants are highly reflective colorants that rely on premium coatings grade special-effect pigments to produce a striking look for polymer parts. KEY CHARACTERISTICS • Available in standard metallic finishes or custom colors • Premium grade special-effect pigments • Uniquely formed particles provide an enhanced metallic effect • Molded-in color eliminates scratching or chipping • Cost effective replacement for painted, plated or metal parts MARKETS AND APPLICATIONS OnColor Brilliant Metallic Colorants add depth and vibrancy to: • Packaging, including premium cosmetics or luxury caps • Transportation, such as interior or exterior automotive trim and components • Consumer goods • Appliances www.avient.com Copyright © 2020, Avient Corporation.

OnColor™ Brilliant Metallic Colorants OnColor™ Brilliant Metallic Colorants are highly reflective colorants that rely on premium coatings grade special-effect pigments to produce a striking look for polymer parts. KEY CHARACTERISTICS • Available in standard metallic finishes or custom colors • Premium grade special-effect pigments • Uniquely formed particles provide an enhanced metallic effect • Molded-in color eliminates scratching or chipping • Cost effective replacement for painted, plated or metal parts MARKETS AND APPLICATIONS OnColor Brilliant Metallic Colorants add depth and vibrancy to: • Packaging, including premium cosmetics or luxury caps • Transportation, such as interior or exterior automotive trim and components • Consumer goods • Appliances www.avient.com Copyright © 2020, Avient Corporation.

In addition, operating income before special items and adjusted EPS are components of various PolyOne annual and long-term employee incentive plans.  A reconciliation of each non-GAAP financial measure with the most directly comparable GAAP financial measure is attached to this presentation which is posted on our website at www.polyone.com. 4 POLYONE CORPORATION What We Do Value Formulation Expertise Inputs Base resins Additives Modifiers Pigments Expertise in Polymer Materials, Services and Solutions OEMs Brand Owners Processers Assemblers Driving customer value with specialty products & services Service InVisiOSM Color Services IQ Design Labs LSS Customer First POLYONE CORPORATION 5 2016 Revenue ($3.3 Billion) by Segment At a Glance United States 65% Europe 12% Canada 8% Asia 8% Latin America 7% $0.13 $0.68 $0.82 $1.00 $1.31 $1.80 $1.96 $2.13 2009 2010 2011 2012 2013 2014 2015 2016 2016 Revenue by Geography 2016 Revenue by End Market Appliance 5% Building & Construction 11% Consumer 11% Electrical & Electronics 5% Healthcare 11% Industrial 15% Packaging 12% Textiles 2% Transportation 19% Wire & Cable 9% Adjusted Earnings Per Share Performance Products & Solutions 19% PolyOne Distribution 31% Designed Structures & Solutions 11% Specialty Engineered Materials 16% Color Additives and Inks 23% 6 POLYONE CORPORATION Returning Cash to Shareholders $0.16 $0.20 $0.24 $0.32 $0.40 $0.48 $0.54 $0.10 $0.20 $0.30 $0.40 $0.50 $0.60 2011 2012 2013 2014 2015 2016 2017 Annual Dividend*  Since 2011, we have returned nearly $850 million to shareholders  $150 million returned through dividends  $697 million returned through share repurchases $697M $0 $150 $300 $450 $600 $750 2011 2012 2013 2014 2015 2016 Cumulative Share Repurchases (in millions) *Initiated in 2011 7 POLYONE CORPORATION 2% 43% 79% 0% 20% 40% 60% 80% 100% 2005 2010 2016 % o f O pe ra tin g In co m e* *Operating Income excludes corporate charges and special items Specialty OI $5M $87M $273M Mix Shift Highlights Specialty Transformation Specialty = ROS > 10% JV’s Performance Products & Solutions Specialty Distribution 8 POLYONE CORPORATION 2006 2016 2020 “Where we were” “Where we are” Platinum Vision Operating Income % of Sales Color, Additives & Inks 1.7% 16.0% 20%+ Specialty Engineered Materials 1.1% 14.3% 20%+ Performance Products & Solutions 5.5% 11.1% 12 – 14% Distribution 2.6% 6.4% 6.5 – 7.5% Designed Structures & Solutions N/A -0.9% 8 – 10% ROIC* 5.0% 12.9% 15% Proof of Performance & 2020 Platinum Vision *ROIC is defined as TTM adjusted OI after tax divided by the sum of average debt and equity less cash over a 5 quarter period Consistently Deliver Double Digit Annual EPS Growth POLYONE CORPORATION 9 2,883 2,538 2006 2016 Volume (lbs in millions) -12% $103 $200 2006 2016 Commercial, R&D and Marketing Spending ($M) +95% $88 $317 2006 2016 Adjusted Operating Profit ($M) +263% Ours is Not a Cost Cutting Story 10 POLYONE CORPORATION Innovation Drives Earnings Growth *Specialty Platform revenue from products introduced in last five years $20 $54 2006 2016 Research & Development Spending ($ millions) Specialty Platform Vitality Index Progression* 14% 33% 2006 2016 CAI & SEM Gross Margin 12% 42% 2006 2016 Target ≥ 35% Innovation Pipeline Potential 11 POLYONE CORPORATION Primary Industries Served 2016 Revenue: $3.3 Billion Electrical & Electronic 5% Building & Construction 11% Appliance 5% Industrial 15% Wire & Cable 9% Healthcare 11% Consumer 11% Packaging 12% Transportation 19% Focus End Markets 12 POLYONE CORPORATION Therma-Tech™ & Sheet GEON™ Vinyl Polymer Colorants Therma-Tech™ TPE’s & Film TPE + OnForce™ Gravi-Tech™ Page 12 Film Target End Markets… Healthcare 13 POLYONE CORPORATION Sound & Vibration Management Fuel Handling Systems Interior & Exterior Trim Structural Braces & Brackets Interior Structural Components Lighting Air management Electronics & Cameras Fluid Handling Target End Markets… Automotive Underhood Components Roof Systems 14 POLYONE CORPORATION PreservaPak™ OnColor™ Smart Batch™ VersaFlex™ TPE Cap Liner ColorMatrix™ Amosorb™ Oxygen Scavenger ColorMatrix™ Ultimate™ UV Light Barrier OnCap™ Laser Marking Additives Target End Markets… Packaging 15 POLYONE CORPORATION Source: Outdoor Industry Association TPE Vibration Dampening (SEM/GLS) TPE + OnForce (SEM) OnForce (SEM) Advanced Composites (SEM) TPE Vibration Dampening (SEM/GLS) Thermoplastic Elastomers (SEM) Advanced Composites (SEM) Polymer Colorants (CAI) Sheet (DSS) TPE & Film (SEM + DSS) Advanced Composites (SEM) Polymer Colorants (CAI) Thermatech (SEM) Thermoplastic Elastomers (SEM) TPE + OnForce (SEM) OnForce (SEM) Target End Markets… Consumer 16 POLYONE CORPORATION Free Cash Flow and Strong Balance Sheet Fund Investment / Shareholder Return  Expanding our sales, marketing, and technical capabilities  Investing in operational and LSS initiatives  ~60 - 70% of capital expenditures fund growth initiatives Organic Growth Acquisitions Share Repurchases Dividends  Targets that expand our: • Specialty offerings • End market presence • Geographic breadth  Growth synergies  Adjacent material solutions  Repurchased 1.2 million shares in Q4 2016  Repurchased 18.8 million shares since early 2013  8.5 million shares are available for repurchase under the current authorization  Increased annual dividend by 12.5% to $0.54 per share, representing the sixth consecutive year of dividend growth POLYONE CORPORATION 17 The New PolyOne: A Specialty Growth Company Why Invest In PolyOne? sa=i&rct=j&q=&esrc=s&frm=1&source=images&cd=&cad=rja&uact=8&ved=0CAcQjRw&url=http://www.mullerquaker.com/products/greek100/greek100-peach-and-passion-fruit&ei=-acYVZq7EIqwyASDjYL4CA&bvm=bv.89381419,d.cWc&psig=AFQjCNGNCQY1_dCN2RPLzxtap_Pu0omTXQ&ust=1427765484498432 POLYONE CORPORATION 22 2016 Revenue: $0.7 Billion At a Glance: Performance Products & Solutions 2016 Revenue by Industry Expanding Profits 5.5% 6.9% 3.8% 3.6% 5.5% 4.3% 6.3% 7.2% 7.7% 8.3% 12-14% 2006 2007 2008 2009 2010 2011 2012 2013 2014 2015 2016 2020 Operating Income % of Sales Platinum Vision 11.1% B & C 30% Transportation 18% W & C 16% Industrial 16% Appliance 6% Consumer 5% Packaging 5% E & E 3% Healthcare 1% United States 78% Canada 16% Latin America 4% Asia 2% Key Applications POLYONE CORPORATION 23 2016 Revenue: $1.1 Billion At a Glance: Distribution Key Suppliers ROIC Expanding Profits 2.6% 3.0% 3.5% 4.0% 4.6% 5.6% 6.4% 5.9% 6.1% 6.6% 6.5-7.5% 6.4% 2006 2007 2008 2009 2010 2011 2012 2013 2014 2015 2016 2020 Operating Income % of Sales Platinum Vision 15% 51% 2006 2016 Transportation 24% Healthcare 22% Industrial 18% Consumer 15% Appliance 6% E & E 5% B & C 4% Packaging 4% W & C 2% http://www.polyone.com/Pages/VariationRoot.aspx 24 POLYONE CORPORATION Application Examples POLYONE CORPORATION 25 Luxury Packaging with Gravitech Density Modified Polymers  Impart weight, sound and metallic finish to caps and closures for cosmetics and spirits applications  Elevate quality and prestige perceptions among high-end consumers  Eliminate time and cost associated with secondary operations and assembly POLYONE CORPORATION 26  Eliminate costs by increasing pigment density  Enhance color performance without altering form and formulation  Increase design capabilities by reducing weight and layer thickness Optimize Color Usage with OnColor Super Concentrates POLYONE CORPORATION 27  Inhibit microbial growth on polymer surface  Enhance value or products and devices  Highly versatile concentrate with the ability to be incorporated into a wide variety of products Combat Bacteria Formation with WithStand Antimicrobial Technology POLYONE CORPORATION 28 Medical Device Housings with Chemically Resistant Engineered Polymers  Durable, long-lasting products stand up to the most aggressive disinfectants  Minimize environmental stress cracking and discoloration  One of the broadest medically approved polymer and colorant portfolios POLYONE CORPORATION 29 Color & Design Services  Greater control of color development and supply chain  Work across entire design process from concept to commercialization  Inspire creativity in the use of polymer materials, colors and effects  Innovative brand differentiation  Faster development timelines POLYONE CORPORATION 30 Outdoor Applications  Leading provider of high performance specialty materials for the recreational and sports & leisure industry  Well positioned across all segments to address market needs  Metal to Polymer Conversion  Lightweighting  Thermal Management  Impact Performance Source: Outdoor Industry Association POLYONE CORPORATION 31 Fiber Colorants Solutions for clothing, apparel, footwear, automotive & sporting goods  ColorMatrix Fiber Colorant Solutions  Proprietary advanced liquid color formulations and equipment enable greater efficiency and productivity  Eliminates aqueous dyeing and its associated wastewater treatment  Solid Color Concentrates  Extrusion-spun fibers colored via solid masterbatch POLYONE CORPORATION 32 High-Barrier Packaging Containers  Capability to extrude up to 13 layers  Strong oxygen and moisture vapor transmission protection  Can be made symmetrical or asymmetrical to meet customized needs of broad variety of applications  Barrier protection and superior sensory properties 1 Reconciliation of Non-GAAP Financial Measures (Unaudited) (Dollars in millions, except per share data) Senior management uses comparisons of adjusted net income attributable to PolyOne common shareholders, adjusted earnings per share (EPS) attributable to PolyOne common shareholders and operating income before special items to assess performance and allocate resources because senior management believes that these measures are useful in understanding current profitability levels and that current levels may serve as a base for future performance. Adjusted EPS attributable to PolyOne common shareholders is calculated as follows: 2009* 2010 2011 2012 2013 2014 2015 2016 Net income attributable to PolyOne common shareholders $ 106.7 $ 152.5 $ 153.4 $ 53.3 $ 94.0 $ 78.0 $ 144.6 $ 165.2 Joint venture equity earnings, after tax (19.0) (14.7) (3.7) — — — — — Special items, before tax(1) (48.7) 24.2 (48.1) 55.1 46.3 164.2 87.6 35.5 Special items, tax adjustments(1) (27.2) (96.7) (24.7) (18.9) (13.7) (73.7) (58.7) (20.7) Adjusted net income attributable to PolyOne common shareholders $ 11.8 $ 65.3 $ 76.9 $ 89.5 $ 126.6 $ 168.5 $ 173.5 $ 180.0 Diluted shares 93.4 96.0 94.3 89.8 96.5 93.5 88.7 84.6 Adjusted EPS attributable to PolyOne common shareholders $ 0.13 $ 0.68 $ 0.82 $ 1.00 $ 1.31 $ 1.80 $ 1.96 $ 2.13 Adjusted operating income is calculated as follows: 2006* 2016 Operating income $ 233.6 $ 281.9 Special items (1) (39.1) 35.3 Joint venture equity earnings (107.0) 0.0 Adjusted operating income $ 87.5 $ 317.2 * Historical results are shown as presented in prior filings and have not been updated to reflect subsequent changes in accounting principle, discontinued operations or the related resegmentation. (1) Special items include charges related to specific strategic initiatives or financial restructuring such as: consolidation of operations; debt extinguishment costs; costs incurred directly in relation to acquisitions or divestitures; employee separation costs resulting from personnel reduction programs, plant realignment costs, executive separation agreements; asset impairments; mark-to-market adjustments associated with actuarial gains and losses on pension and other post-retirement benefit plans; environmental remediation costs, fines, penalties and related insurance recoveries related to facilities no longer owned or closed in prior years; gains and losses on the divestiture of operating businesses, joint ventures and equity investments; gains and losses on facility or property sales or disposals; results of litigation, fines or penalties, where such litigation (or action relating to the fines or penalties) arose prior to the commencement of the performance period; one-time, non-recurring items; the effect of changes in accounting principles or other such laws or provisions affecting reported results and tax adjustments.

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Composite Heat Release Technology

Senior management also uses operating income before special items to assess performance and allocate resources because senior management believes that these measures are useful in understanding current profitability levels and how it may serve as a basis for future performance. In addition, operating income before the effect of special items is a component of Avient’s annual incentive plans and is used in debt covenant computations. We also monitor earnings (defined as net income from continuing operations) before interest, taxes, depreciation and amortization (EBITDA) and adjusted EBITDA (EBITDA before the impact of special items) as a supplement to our GAAP measures.

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