The United Nations Convention respecting Contracts for the International Sale of Goods shall not apply to sales under these Terms. 21.

Additionally, Adjusted EPS excludes the impact of special items and amortization expense associated with intangible assets. 2 PRO FORMA 2021 TO 2022 BRIDGE 3 2021 EPS from Continuing Operations 1.69$ Pro Forma & Special Items 1.33 Proforma 2021 Adjusted EPS 3.02$ FX Impact (0.22) China Lockdowns / Russia Import Sales (0.24) Outdoor High Performance (0.13) Dyneema 0.06 Color, Additives and Inks 0.38 Legacy Specialty Engineered Materials 0.22 Other 0.01 Proforma 2022 Adjusted EPS 3.10$ Constant Currency Sales Sales COLOR, ADDITIVES AND INKS Q1 Q2 Q3 Q4 FY 4% Q1 Q2 Q3 Q4 FY 4% 7% (4%) (9%) 6% (10%) 0% 1% 2% Constant currency reflects prior year results restated at current year foreign exchange rates Q1 Q2 Q3 Q4 FY Q1 Q2 Q3 Q4 FY 7% 10% 4% (3%) 12% (6%) 5% 6% 9% 610 650 624 649 587 565 581 526 2,402 2,390 589 650 589 649 543 565 545 526 2,266 2,390 116 121 112 119 93 95 88 79 409 414 113 121 106 119 87 95 84 79 390 414 Constant Currency EBITDA EBITDA 10% 4 Constant Currency EBITDA Sales Q1 Q2 Q3 Q4 FY (1%) PRO FORMA SPECIALTY ENGINEERED MATERIALS Q1 Q2 Q3 Q4 FY 16%8% (8%) (8%) 3% (6%) (6%) (2%) 2% EBITDA Constant Currency Sales Constant currency reflects prior year results restated at current year foreign exchange rates Q1 Q2 Q3 Q4 FY 4% Q1 Q2 Q3 Q4 FY 20%12% (1%) (2%) 5% (1%) (2%) 3% 6% 314 338 348 343 325 300 321 295 1,308 1,276 303 338 329 343 303 300 301 295 1,236 1,276 67 78 75 77 70 66 66 62 278 283 65 78 73 77 67 66 63 62 268 283 5 Constant Currency Adjusted EPS Adjusted EPS PRO FORMA AVIENT Q1 Q2 Q3 Q4 FY 10% (3%) (21%) 3% Q1 Q2 Q3 Q4 FY Q1 Q2 Q3 Q4 FY 9% 5% 7% (5%) (9%) (1%) (1%) (12%) 1% Sales Constant Currency Sales Constant currency reflects prior year results restated at current year foreign exchange rates Q1 Q2 Q3 Q4 FY 17% 8% (14%) 11% Q1 Q2 Q3 Q4 FY Q1 Q2 Q3 Q4 FY 14% 10% 11% 2% (3%) 5% 8% (5%) 7% EBITDA Constant Currency EBITDA 925 987 973 992 912 867 902 823 3,712 3,669 893 987 919 992 847 867 845 823 3,504 3,669 161 176 164 172 142 141 133 117 600 606 155 176 157 172 131 141 123 117 566 6068% 2% 0.84 0.98 0.87 0.96 0.70 0.68 0.61 0.48 3.02 3.10 0.79 0.98 0.82 0.96 0.63 0.68 0.56 0.48 2.80 3.10 17% 24% 6 Three Months Ended March 31, 2022 Three Months Ended March 31, 2021 Reconciliation to Condensed Consolidated Statements of Income Avient EPS Avient EPS Net income from continuing operations $ 64.7 $ 60.4 Net income attributable to noncontrolling interests (0.3) (0.4) Net income from continuing operations attributable to Avient shareholders $ 64.4 $ 0.70 $ 60.0 $ 0.65 Special items, after tax $ 6.4 $ 0.07 $ 2.6 $ 0.03 APM pro forma adjustments 2.6 0.03 (3.1) (0.03) Amortization expense, after tax 17.4 0.19 17.9 0.19 Adjusted pro forma net income / EPS $ 90.8 $ 0.98 $ 77.4 $ 0.84 Weighted average diluted shares 92.3 92.2 Three Months Ended June 30, 2022 Three Months Ended June 30, 2021 Reconciliation to Condensed Consolidated Statements of Income Avient EPS Avient EPS Net income from continuing operations $ 62.8 $ 50.2 Net income attributable to noncontrolling interests — (0.6) Net income from continuing operations attributable to Avient shareholders $ 62.8 $ 0.68 $ 49.6 $ 0.54 Special items, after tax $ 3.2 $ 0.03 $ 11.7 $ 0.13 APM pro forma adjustments 5.2 0.06 1.4 0.02 Amortization expense, after tax 17.2 0.19 17.8 0.19 Adjusted pro forma net income / EPS $ 88.4 $ 0.96 $ 80.5 $ 0.87 Weighted average diluted shares 92.1 92.4 Three Months Ended September 30, 2021 Reconciliation to Condensed Consolidated Statements of Income Avient EPS Net income from continuing operations $ 33.4 Net income attributable to noncontrolling interests 0.3 Net income from continuing operations attributable to Avient shareholders $ 33.7 $ 0.37 Special items, after tax $ 11.7 $ 0.13 APM pro forma adjustments 1.5 0.02 Amortization expense, after tax 17.6 0.19 Adjusted pro forma net income / EPS $ 64.5 $ 0.70 Weighted average diluted shares 92.2 Adjusted EPS may not recalculate due to rounding. 1 Three Months Ended December 31, 2021 Year Ended December 31, 2021 Reconciliation to Condensed Consolidated Statements of Income Avient EPS Avient EPS Net income from continuing operations $ 11.2 $ 155.2 Net income attributable to noncontrolling interests 0.9 0.2 Net income from continuing operations attributable to Avient shareholders $ 12.1 $ 0.13 $ 155.4 $ 1.69 Special items, after tax $ 24.0 $ 0.26 $ 50.0 $ 0.54 APM pro forma adjustments 2.5 0.03 1.6 0.02 Amortization expense, after tax 17.8 0.19 71.1 0.77 Adjusted pro forma net income / EPS $ 56.4 $ 0.61 $ 278.1 $ 3.02 Weighted average diluted shares 92.4 92.1 Reconciliation of Color, Additives and Inks EBITDA Q1 2021 Q2 2021 Q3 2021 Q4 2021 YTD 2021 Q1 2022 Q2 2022 Operating Income 88.8 86.3 66.8 61.2 303.1 94.5 93.6 Depreciation and amortization 27.4 25.3 26.6 26.4 105.7 26.0 25.9 EBITDA $ 116.2 $ 111.6 $ 93.4 $ 87.6 $ 408.8 $ 120.5 $ 119.5 Reconciliation of Specialty Engineered Materials EBITDA Q1 2021 Q2 2021 Q3 2021 SEM Pro forma APM Pro forma SEM SEM Pro forma APM Pro forma SEM SEM Pro forma APM Pro forma SEM Operating Income 32.6 9.1 41.7 35.8 13.9 49.7 30.0 15.2 45.2 Depreciation and amortization 7.8 17.5 25.3 8.1 17.3 25.4 7.9 17.1 25.0 EBITDA $ 40.4 $ 26.6 $ 67.0 $ 43.9 $ 31.2 $ 75.1 $ 37.9 $ 32.3 $ 70.2 Reconciliation of Specialty Engineered Materials EBITDA Q4 2021 YTD 2021 SEM Pro forma APM Pro forma SEM SEM Pro forma APM Pro forma SEM Operating Income 27.1 11.7 38.8 125.5 49.9 175.4 Depreciation and amortization 8.0 18.9 26.9 31.8 70.8 102.6 EBITDA $ 35.1 $ 30.6 $ 65.7 $ 157.3 $ 120.7 $ 278.0 2 Reconciliation of Specialty Engineered Materials EBITDA Q1 2022 Q2 2022 SEM Pro forma APM Pro forma SEM SEM Pro forma APM Pro forma SEM Operating Income 38.3 15.4 53.7 35.2 17.7 52.9 Depreciation and amortization 7.8 16.6 24.4 7.7 16.6 24.3 EBITDA $ 46.1 $ 32.0 $ 78.1 $ 42.9 $ 34.3 $ 77.2 Reconciliation of Avient consolidated pro forma EBITDA Q1 2021 Q2 2021 Q3 2021 Avient Pro forma APM Pro forma Avient Avient Pro forma APM Pro forma Avient Avient Pro forma APM Pro forma Avient Net income from continuing operations 60.4 (3.1) 57.3 50.2 1.4 51.6 33.4 1.5 34.9 Income tax expense 16.3 1.1 17.4 13.8 1.3 15.1 2.0 2.5 4.5 Interest expense 19.3 11.1 30.4 19.5 11.2 30.7 19.0 11.2 30.2 Depreciation and amortization 36.9 17.5 54.4 33.6 17.3 50.9 36.6 17.1 53.7 EBITDA 132.9 26.6 159.5 117.1 31.2 148.3 91.0 32.3 123.3 Special items, before tax 2.4 — 2.4 14.2 — 14.2 19.9 — 19.9 Depreciation included in special items (0.6) — (0.6) 1.4 — 1.4 (0.9) — (0.9) Adjusted EBITDA $ 134.7 $ 26.6 $ 161.3 $ 132.7 $ 31.2 $ 163.9 $ 110.0 $ 32.3 $ 142.3 Reconciliation of Avient consolidated pro forma EBITDA Q4 2021 YTD 2021 Avient Pro forma APM Pro forma Avient Avient Pro forma APM Pro forma Avient Net income from continuing operations 11.2 2.5 13.7 155.2 1.6 156.8 Income tax expense 16.2 (1.9) 14.3 48.3 3.7 52.0 Interest expense 17.5 11.1 28.6 75.3 44.6 119.9 Depreciation and amortization 37.9 18.9 56.8 145.0 70.8 215.8 EBITDA 82.8 30.6 113.4 423.8 120.7 544.5 Special items, before tax 20.6 — 20.6 57.1 — 57.1 Depreciation included in special items (1.6) — (1.6) (1.7) — (1.7) Adjusted EBITDA $ 101.8 $ 30.6 $ 132.4 $ 479.2 $ 120.7 $ 599.9 3 Reconciliation of Avient consolidated pro forma EBITDA Q1 2022 Q2 2022 Avient Pro forma APM Pro forma Avient Avient Pro forma APM Pro forma Avient Net income from continuing operations 64.7 2.6 67.3 62.8 5.2 68.0 Income tax expense 20.0 1.7 21.7 22.7 1.4 24.1 Interest expense 16.9 11.1 28.0 16.2 11.1 27.3 Depreciation and amortization 37.6 16.6 54.2 36.3 16.6 52.9 EBITDA 139.2 32.0 171.2 138.0 34.3 172.3 Special items, before tax 6.6 — 6.6 0.9 — 0.9 Depreciation included in special items (2.1) — (2.1) (1.1) — (1.1) Adjusted EBITDA $ 143.7 $ 32.0 $ 175.7 $ 137.8 $ 34.3 $ 172.1 Reconciliation of Specialty Engineered Pro Forma Sales Q1 2021 Q2 2021 Q3 2021 Q4 2021 YTD 2021 Q1 2022 Q2 2022 Sales 214.7 238.9 231.7 226.3 911.6 243.1 242.3 Pro forma APM 98.9 108.8 93.8 94.9 396.4 94.8 100.5 Pro forma sales $ 313.6 $ 347.7 $ 325.5 $ 321.2 $ 1,308.0 $ 337.9 $ 342.8 Reconciliation of Avient Pro Forma Sales Q1 2021 Q2 2021 Q3 2021 Q4 2021 YTD 2021 Q1 2022 Q2 2022 Sales 826.0 864.5 818.0 807.1 3,315.6 892.2 891.0 Pro forma APM 98.9 108.8 93.8 94.9 396.4 94.8 100.5 Pro forma sales $ 924.9 $ 973.3 $ 911.8 $ 902.0 $ 3,712.0 $ 987.0 $ 991.5 4 IR Slides V17 - 9.26 324pm IR Deck - AVNT-2022.09.27 Pre Release v2

The United Nations Convention respecting Contracts for the International Sale of Goods shall not apply to sales under these Terms. 21.

This does not affect any right or remedy of a third party which exists, or is available, apart from that Act. 21.

The United Nations Convention respecting Contracts for the International Sale of Goods shall not apply to sales under these Terms. 21.

Page 3 Strategy and Execution Drive Results 90% $22 $24 PolyOne Stock Price 50% 70% $18 $20 $22 S&P 500 (relative performance) 30% $12 $14 $16 S&P 500 (relative performance) ‐10% 10% $6 $8 $10 50% ‐30% $0 $2 $4 $ | ‐50%$0 2006 2007 2008 2009 2010 2011 2012 2013 Page 4 Four Pillar Strategy The World’s Premier Provider of SpecializedThe World s Premier Provider of Specialized Polymer Materials, Services & Solutions Page 5 Spartech – Compelling Strategic Rationale • Spartech expands PolyOne’s specialty portfolio with adjacent technologies in attractive end markets  Bolt on acquisition with opportunity for global expansion as only Bolt‐on acquisition with opportunity for global expansion, as only 6% of Spartech’s revenues are outside of North America • PolyOne has a proven management team with a track record of transformational success • Preliminary synergy estimated at $65 million run rate by end of 3year 3  Significant opportunity to expand profitability by leveraging PolyOne’s four pillar strategy • Substantial potential share price appreciation for all shareholders f f ll / $ Accretive to EPS in first full year post‐acquisition / $0.50 once synergies realized Page 6 Mix Shift Highlights Specialty Transformation Old PolyOne Transformation 100% 2015 Target 80% In co m e* 65 – 75%40% 60% f O pe ra tin g 34% 43% 45% 65 75% 20% % o f 2%0% 2005 2008 2010 2012 2015 Specialty OI $5M $46M $87M $114M Target *Operating Income excludes corporate charges and special items JV's PP&S Distribution Specialty Page 7 Proof of Performance 2007 2012 2015 “Where we were” “Where we are” “Where we Where we were Where we are expect to be" 1) Operating Income % Specialty 3.2% 9.1% 12 – 16% PP&S 6.1% 9.0% 9 – 12% Distribution 3.0% 6.4% 6 – 7.5% 2) Specialty Platform sss% of Operating Income 20% 45% 65 – 75% 3) ROIC* ( ft t ) 7% 11% 15%3) ROIC* (after‐tax) 7% 11% 15% 4) Adjusted EPS Growth** N/A 4 yr CAGR = 55% Double Digit Expansion *ROIC is defined as TTM adjusted OI divided by the sum of average debt and equity over a 5 quarter period **4 yr EPS CAGR calculated using 2012 adjusted EPS vs 2008 adjusted EPS Page 8 Proof of Performance Spartech Opportunity Intermediate PolyOne Spartech Opportunity 2006 2012 Today Goal “Where we were” “Where we are” “Where Spartech is”* “Where we can go”were are Spartech is can go Specialty Operating Margin 1.5% 9.1% 2.2% 8.0% – 10.0% Margin Page 9 *Pro Forma results include Spartech corporate allocations for FY12 ended November 3, 2012 At a Glance PolyOne Europe 14% Canada 8% Asia 5% Latin America 3% Distribution 2012 Revenues: $4.2 Billion* 2012 Revenues: $4.2 Billion* United States 70% 14% 5% PP&S 20%Specialty 57% 23% 70% Appliance 5% Building & HealthCare Transportation 16% Textiles 2% 1.02 1.20 $1.20 $1.40 ha re End Markets* EPS Growth g Construction 14% Wire & Cable 8% Consumer 8% Packaging 17% Industrial 11% Misc. 6% 9% 0.27 0 21 0.79 $0.40 $0.60 $0.80 $1.00 Ad ju st ed E ar ni ng s P er S Electrical & Electronics 4% 0.12 0.21 0.13 $0.00 $0.20 2006 2007 2008 2009 2010 2011 2012 Page 10 * Pro Forma includes FY2012 results for Spartech (11/03/12 YE) and Glasforms At a Glance Specialty U it d 2012 Revenues: $2.4 Billion* Solutions United States 59% Europe 23% Asia Canada 4% Asia 9% Latin America 5% Appliance 4% Building & C t ti HealthCare 5% Transportation 16% Textiles 2% % o f S al es 12-16% End Markets* Expanding Profits Construction 11% Wire & Cable 7% Electrical & Electronics Packaging 23% Industrial 7% Misc. 15% 1.5% 3.2% 4.3% 5.3% 8.4% 9.1% O pe ra tin g In co m e % 8.0% Electronics 4% Consumer 6% Page 11 2006 2007 2008 2009 2010 2011 2012 2015 O Target* Pro Forma includes FY2012 results for Spartech (11/03/12 YE) and Glasforms At a Glance Designed Structures and Solutions United States 2012 Revenues: $0.85 Billion* Solutions 84% Europe 2% Canada 7% Latin America 7% Appliance 4% Building & Construction 11% Wire & Cable Sign & Advertising 3% Recreation & Leisure 2% Pool & Spa 1% Distribution & Thermoform 8% Textiles 2% Operating Income % of Sales 2012 Revenue by Industry Segment* Expanding Profits** Wire & Cable 7% Electrical & Electronics 4% Consumer 6% Packaging 23%Industrial 7% Transportation 16% 3% 2.2% 8 ‐ 10% 7% Misc. 1% HealthCare 5% 2012 2015 Target Page 12 *Pro Forma includes FY2012 results for Spartech (11/03/12 YE) **Pro Forma results include Spartech corporate allocations for FY12 Positioned for Earnings Growth 2015 Target Rev: $5B Adj.

Use of Non-GAAP Measures 4POLYONE CORPORATION INPUTS FORMULATION EXPERTISE SERVICE VALUE Base resins Additives Modifiers Pigments Expertise in Polymer Materials, Services and Solutions OEMs Brand Owners Processers Assemblers InVisiO SM Color Services IQ Design Labs LSS Customer First Specialty products & services What We Do Driving customer value 5POLYONE CORPORATION $0.13 $0.68 $0.82 $1.00 $1.31 $1.80 $1.96 $2.06 2009 2010 2011 2012 2013 2014 2015 2016* *Recast for DSS in discontinued operations PolyOne At a Glance Performance Products & Solutions 22% PolyOne Distribution 34% Specialty Engineered Materials 18% Color Additives and Inks 26% 2016 Revenue by Segment Adjusted Earnings per Share 2016 Revenue by Geography United States 60% Europe 15% Latin America 9% Canada 7% Asia 10% 6POLYONE CORPORATION 2% 43% 76% 0% 20% 40% 60% 80% 100% 2005 2010 3Q 2017 % o f O p e ra ti n g I n c o m e * *Operating Income excludes corporate charges and special items **LTM 3Q 2017 Specialty OI $5M $87M $275M** JV’s Performance Products & Solutions Specialty MixDistribution Mix Shift Highlights Specialty Transformation Distribution and Contract Manufacturing Businesses 7POLYONE CORPORATION 2014 2015 2016 2017 2014 2015 2016 2017 Driving Growth • Refreshed training curriculum for sales force • Upgraded capabilities to generate and capture new business leads • Expanded R&D resources to focus on key platforms 2014 2015 2016 2017 Investment in Commercial Resources Commercial Resource Additions* Total Sales CallsSales Opportunity Funnel (in billions) *Sales, Marketing & Technology headcount 8POLYONE CORPORATION *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 Proof of Performance & 2020 Platinum Vision 20%+ 20%+ 12 - 14% 6.5 – 7.5% 15% Consistently Deliver Double Digit Annual EPS Growth 2006 YTD 2017 2020 “Where we were” “Where we are” Platinum Vision ROIC* 5.0% 13.8% Operating Income % of Sales Color, Additives & Inks 1.7% 16.4% Specialty Engineered Materials 1.1% 13.1% Performance Products & Solutions 5.5% 11.4% Distribution 2.6% 6.6% 9POLYONE CORPORATION $50 $116 $137 $0 $40 $80 $120 $160 $200 2012 2014 2016 2017 10.8% 11.3% 12.9% 13.8% 10.0% 11.0% 12.0% 13.0% 14.0% 15.0% 2012 2014 2016 3Q 2017 2020 Platinum Vision Free Cash Flow (in millions) ROIC* *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 Free Cash Flow and Improving Returns 15.0% >$200 10POLYONE CORPORATION $0.16 $0.20 $0.24 $0.32 $0.40 $0.48 $0.54 $0.70 $- $0.10 $0.20 $0.30 $0.40 $0.50 $0.60 $0.70 $0.80 $0.90 $1.00 2011 2012 2013 2014 2015 2016 2017 2018 2019 2020 Annual Dividend 7 Consecutive Years of Increased Dividends 3-Year Dividend Plan  Announced 30% increase to dividend in October 2017, reflecting strong and sustainable cash flow as well as confidence in future earnings growth  Expect to increase annual dividend 60% or more cumulatively over next three years 11POLYONE CORPORATION $767M Returning Cash to Shareholders $0 $150 $300 $450 $600 $750 2011 2012 2013 2014 2015 2016 3Q 2017 Cumulative Share Repurchases (in millions)  Since 2011, we have returned over $950 million to shareholders  $192 million returned through dividends  $767 million returned through share repurchases  Have repurchased 20.8 million shares since early 2013 $767M 12POLYONE CORPORATION  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 2.0 million shares YTD 2017  Repurchased 20.8 million shares since early 2013  6.5 million shares are available for repurchase under the current authorization  Increased annual dividend by 30% to $0.70 per share, representing the seventh consecutive year of dividend growth Free Cash Flow and Strong Balance Sheet Fund Investment / Shareholder Return 13POLYONE CORPORATION *Specialty Platform revenue from products introduced in last five years Vitality Index Progression* 12% 42% 2006 2016 Target ≥ 35% Innovation Drives Earnings Growth Innovation Pipeline Potential $20 $54 2006 2016 Research & Development Spending ($ millions) Phase 1 Frame Opportunity 12 Projects Phase 2 Build Business Case 10 Projects Phase 3 Prototype 21 Projects Phase 4 Scale-up & Test Market 19 Projects Phase 5 Commercial Launch 10 Projects $500 Million $1.4 Billion $700 Million Total Specialty Addressable Market of over $2.6 Billion 14POLYONE CORPORATION Key Innovation Growth Drivers Composites Barrier Additive Technology Fiber Colorants Flame Retardant Polymers  Increasing regulatory drive for halogen replacements  $400m addressable market  Drive to prevent oxygen, light and UV rays from affecting contents in PET packaging, extending shelf life  $200m addressable market  60% of world fiber consumption is synthetic, need to simplify manufacturing and eliminate waste  $300m addressable market  Polymer formulation and process engineering create a pipeline for next generation materials  Drive to replace aluminum and steel with plastics without compromising on strength 15POLYONE CORPORATION  Providing LSS services to small/medium sized customers  54% of associates trained in LSS, with over 125 active black belts  Have trained over 30 customers in LSS methodology  Providing training in Customer Centric Selling Skills with customers  Providing Industrial design and color services to small/medium sized customers  On time delivery above 95% Strengthening relationships: Customer First Through World-Class Service 16POLYONE CORPORATION  Addressable market exceeds $40 billion  Strong performance demonstrates that our strategy and execution are working  Megatrends and emerging opportunities align with strengths  Innovation and services provide differentiation, incremental pricing power and competitive advantage  Strategic reinvestment for growth while returning cash to shareholders  Strong and proven management team driving growth and performance Why Invest In PolyOne?

The United Nations Convention respecting Contracts for the International Sale of Goods shall not apply to sales under these Terms. 21.

The United Nations Convention respecting Contracts for the International Sale of Goods shall not apply to sales under these Terms. 21.

The United Nations Convention respecting Contracts for the International Sale of Goods shall not apply to sales under these Terms. 21.