Please submit your vote and proxy by telephone or over the Internet, or complete, sign, date and return your proxy or voting instruction form. Measure 2018 2017 Change Return to Shareholders. Kunkle APPENDIX A Year Ended Year Ended December 31, 2018 December 31, 2017 Reconciliation to Condensed Consolidated Statements of Income $ EPS $ EPS Year Ended Year Ended December 31, 2016 December 31, 2015 Reconciliation to Condensed Consolidated Statements of Income $ EPS $ EPS Year Ended December 31, 2014 Reconciliation to Condensed Consolidated Statements of Income $ EPS Year Ended December 31, Reconciliation to Consolidated Statements of Income 2018 2017 As of December 31, 2018 Table Of Contents Message From Our CEO Notice Of 2019 Annual Meeting Of Shareholders Proxy Summary Proxy Statement Proposal 1-Election Of Board Of Directors Proposal 2-Advisory Vote To Approve Named Executive Officer Compensation Proposal 3-Ratification Of Appointment Of Independent Registered Public Accounting Firm Corporate Governance 2018 Non-employee Director Compensation Ownership Of Polyone Shares Compensation Discussion And Analysis Executive Summary Executive Compensation Philosophy And Objectives What We Pay And Why: Elements Of Compensation Other Aspects Of Our Compensation Programs Executive Compensation 2018 Summary Compensation Table 2018 Grants Of Plan-Based Awards Outstanding Equity Awards At 2018 Fiscal Year-End 2018 Option Exercises And Stock Vested 2018 Nonqualified Deferred Compensation Potential Payments Upon Termination Or Change Of Control CEO Pay Ratio Disclosure Compensation Committee Interlocks And Insider Participation Policy On Related Person Transactions Risk Assessment Of The Compensation Programs Compensation Committee Report Miscellaneous Provisions Appendix A

ANAHEIM, Calif. – PolyOne Advanced Composites, a new platform within PolyOne’s Specialty Engineered Materials business, is exhibiting for the first time at CAMX 2016, a premier composites industry event. About PolyOne Advanced Composites Created in 2016, this platform within PolyOne Specialty Engineered Materials consists of Glasforms™, Gordon Glass™, Gordon Composites™ and Polystrand™ branded businesses. Photo Caption: Matt Borowiec, general manager, PolyOne Advanced Composites Photo ©PolyOne

OnForce™ Long Glass Fiber Reinforced Polypropylene Composites  Explore the unique capabilities of specialty long fiber reinforced composites Complēt™ and OnForce™ Long Fiber Reinforced Thermoplastic Composites - Design Guide

Sign, date and return your proxy card/voting instruction forff m to vote BY MAIL. The folff lowing chart compares cumulative total shareholder return (“TSR”) on our common shares against the cumulative total return of the S&P 500 Index and the S&P Mid Cap Chemicals Index for the fivff e-year period December 31, 2011 to December 31, 2016, assuming in each case a fixff ed investment of $100 and reinvestment of all dividends. We suggest that all proposals be sent by certified mail, return receipt requested.

Sign, date and return your proxy card and/or voting instruction card to vote by mail. Key 2022 Company Performance Results and Return to Shareholders. 2022 was a challenging but pivotal year for Avient and our vision to be a world-class sustainable organization. For each Covered Year, our peer group cumulative total shareholder return was calculated based on a deemed fixed investment of $100 through the Measurement Period, assuming dividend reinvestment

CLEVELAND – PolyOne today announced it will unveil Hammerhead™ Marine Composite Panels at the Composites and Advanced Materials Expo (CAMX) in Orlando, Fla. next week. PolyOne Advanced Composites will feature Hammerhead Marine Composite Panels at CAMX (booth R12), December 12–14.  EDITORS: For a high-resolution image, please click here: Hammerhead™ Marine Composite Panels

GUIDANCE DEBT / LEVERAGE REDUCTION • Completed sale of Distribution and paid down $750M of debt in November • Strong free cash flow in fourth quarter reduced leverage and enabled paydown of additional $200M of debt • Fixed/Floating Debt Ratio 63/37 • Proven track record of deleveraging following acquisitions through consistent free cash flow generation $725 $725 $725 $575 $500 $400 $600 $525 $425 $650 $650 $650 $600 $2.40B $2.20B 2030 Notes 2029 Term Loan 2026 Term Loan 2025 Notes After Distribution Divestiture Year-End Year-End Leverage 3.8x 3.1x 2.9x 2023 Notes After Avient Protective Materials Acquisition $3.15B 2022 TRANSFORMATIONAL PORTFOLIO ENHANCEMENTS 5 EBITDA margins expanded from 12% to 16% Diversified end markets with reduced exposure to more cyclical industries Dyneema® Acquisition $1.48B acquisition strengthens composites platform Significantly improved EBITDA margins $950M divestiture results in 100% specialty sales Strong exit multiple of 10x TTM EBITDA despite market volatility Distribution Divestiture Improved Portfolio GROWING COMPOSITES PLATFORM CONTRIBUTIONS TO SEM SEGMENT 6 Note: 2022 is pro forma for Avient Protective Materials 2016 Sales 2022 Sales Advanced Composites 51% $560M $1,300M Advanced Composites COMPOSITES PORTFOLIO D Y N E E M A ® E X P A N D S O U R E N G I N E E R E D F I B E R S A N D T A P E S T E C H N O L O G Y LFT Tapes Laminates/Panels Shapes Pultrusion Engineered Fibers 7 ADVANCED COMPOSITES PERFORMANCE 8 (1) Pro forma for the acquisition of Avient Protective Materials $51 $84 $212 $668 $4 $10 $41 $169 (1) (1) PORTFOLIO EVOLUTION AND EPS EXPANSION 9 Adj. $600 $592 $3.02 $3.04 FULL YEAR 2022 PERFORMANCE (TOTAL COMPANY PRO FORMA) 15 Sales Adjusted EBITDA $3,712 $3,653 -2% Adjusted EPS -1% + 1% (in millions) (in millions) (+4% excluding FX) (+5% excluding FX) (+9% excluding FX) FULL YEAR 2022 SEGMENT PERFORMANCE 16 CAI $2,402 $2,355 $409 $402 SEM Pro Forma $1,308 $1,300 $278 $272 (+4% excluding FX) - 2% -1% (+5% excluding FX) - 2% (+4% excluding FX) - 2% (+2% excluding FX) PRO FORMA FULL YEAR EPS BRIDGE 17 Pro Forma 2021 Adjusted EPS 3.02$ Foreign Currency (0.23) Russia Import Sales (0.07) Outdoor High Performance (0.13) Color, Additives and Inks 0.18 Specialty Engineered Materials 0.24 Corporate Costs / Other 0.03 Pro Forma 2022 Adjusted EPS 3.04$ FULL YEAR EBITDA BRIDGE (PRO FORMA TOTAL COMPANY) 18 $ millions CAI: Price / Mix 247 Inflation (176) SEM: Price / Mix 121 Inflation (77) Net Price Benefit 115 Wage and Energy Inflation (47) Clariant Color Integration Synergies 23 Incentives, Other Employee Costs 43 FX (34) Full Year 2022 $592 Adjusted Full Year 2021 $ 600 Demand (99) Russia Import Sales (9) • Demand primarily impacted by China lockdowns, 4th quarter industrywide destocking and declining consumer sentiment • Pricing outpaced inflation of raw materials, wages and energy 2023 G U IDA N CE $125 $530 $0.55 $2.40 2023 GUIDANCE 20 Sales Adjusted EBITDA $845 $3,450 Adjusted EPS (in millions) (in millions) CASH FLOW / BALANCE SHEET 21 • IT investment to further integrate acquired businesses and capture operational efficiencies • Restructuring actions to streamline operations and improve profitability, primarily in Europe ($ millions) 2023E Cash Flow from Operating Activities 350$ Less: Run-Rate CapEx (110) CapEx for IT System Upgrade (25) CapEx for Restructuring (15) Total CapEx (150) Free Cash Flow 200$ Adjusted EBITDA 530$ Net Debt / Adjusted EBITDA 2.9x K E Y G R O W T H D R I V E R S A N D T R A N S F O R M E D P O R T F O L I O GROWTH DRIVERS: PROVEN SUCCESS 23 (1) Pro forma for the acquisition of Avient Protective Materials (APM) COMPOSITES $51 $84 $212 $668 HEALTHCARE $108 $113 $231 $293 8-10% ASIA/EMERGING REGIONS $265 $358 $726 $830 12% $340 $455 $790 $1,175 SUSTAINABLE SOLUTIONS 8-12% (1) (1)(1) (Sales in $ millions) #1 Color Formulator Dyneema® - World’s Strongest Fiber™ #1 in Composites applications for outdoor high performance #1 in Performance Inks Customized solutions 140+ PhDs on staff Rapid development of innovative products Extensive patent (2,500+) portfolio 33% Vitality Index Better-positioned toward stable, high-growth end markets Consumer, packaging, healthcare and defense comprise nearly 60% of sales Agnostic to raw materials, helping all customers achieve their goals Broad portfolio of diversified sustainable solutions 90%+ of our innovation pipeline invested in sustainable solutions Long-term growth rate well above GDP with expectations of 8-12% LEVERAGING OUR TRANSFORMED PORTFOLIO 24 Building & 4% Telecom. 2022 PF $3.65B sales Leading Positions Sustainable SolutionsDiversified IndustriesSpecialty Formulator (1) 2022 Pro forma for the acquisition of Avient Protective Materials (2) 2020 Pro forma for the acquisition of Clariant Color (1)(2) $340M $455M $790M 2016 2018 2020PF 2022PF $1,175M P EE R C O M PAR IS O N S AVIENT IS ASSET LIGHT Capex / Revenue 2023E (%) Avient Specialty Other Specialty / Note: Avient reflects 2023 estimated revenue of $3,450 and estimated run-rate CAPEX of $110M. 27 2 4 4 5 5 5 6 7 7 FREE CASH FLOW CONVERSION Note: Free cash flow conversion calculated as (Adjusted EBITDA – Capex) / Adjusted EBITDA. Free Cash Flow Calculation 2014 2015 2016 2017 2018 2019 2020 2021 2022 Cash provided by operating activities 208.4 227.2 221.3 202.4 253.7 300.8 221.6 233.8 398.4 Capital expenditures (92.8) (91.2) (84.2) (79.6) (76.0) (81.7) (63.7) (100.6) (105.5) Payment of post-acquisition date earnout liability — — — — — — 38.1 — — Taxes paid on gain on divestiture — — — — — — — 142.0 — — Adjusted Free Cash Flow $ 115.6 $ 136.0 $ — $ 137.1 $ 122.8 $ 177.7 $ 219.1 $ 338.0 $ 133.2 $ 292.9 Three Months Ended Year Ended 2022 2021 2022 2021 Sales: Color, Additives and Inks $ 490.8 $ 581.3 $ 2,355.0 $ 2,401.6 Specialty Engineered Materials 300.8 226.3 1,044.4 911.6 Corporate (1.2) (0.5) (2.5) 2.3 Sales $ 790.4 $ 807.1 $ 3,396.9 $ 3,315.5 Operating income: Color, Additives and Inks $ 44.3 $ 61.2 $ 301.0 $ 303.1 Specialty Engineered Materials 35.2 27.1 140.1 125.5 Corporate (79.1) (38.1) (197.8) (148.9) Operating income $ 0.4 $ 50.2 $ 243.3 $ 279.7 Other expense, net: $ (28.4) $ (5.3) $ (59.7) $ (1.0) Depreciation & amortization: Color, Additives and Inks $ 25.2 $ 26.5 $ 101.3 $ 105.7 Specialty Engineered Materials 20.3 7.9 48.7 31.7 Corporate 3.2 3.6 12.5 7.7 Depreciation & Amortization $ 48.7 $ 38.0 $ 162.5 $ 145.1 Earnings before interest, taxes, depreciation and amortization (EBITDA): Color, Additives and Inks $ 69.5 $ 87.7 $ 402.3 $ 408.8 Specialty Engineered Materials 55.5 35.0 188.8 157.2 Corporate (76.0) (34.5) (185.3) (141.2) Other expense, net $ (28.4) $ (5.3) $ (59.7) $ (1.0) EBITDA $ 20.6 $ 82.9 $ 346.1 $ 423.8 Special items in EBITDA 86.8 18.9 162.5 55.4 EBITDA - excluding special items $ 107.4 $ 101.8 $ 508.6 $ 479.2 APM pro forma adjustments - 2021 — 30.4 — 120.5 APM pro forma adjustments - 8 months 2022* — — 83.1 — Pro forma EBITDA $ 107.4 $ 132.2 $ 591.7 $ 599.7 Year Ended December 31, Reconciliation of Pro Forma Sales and EBITDA - SEM 2022 2021 Specialty Engineered Materials $ 1,044.4 $ 911.6 APM pro forma adjustments - 2021 — 396.5 APM pro forma adjustments - 8 months 2022* 256.1 — Pro forma sales $ 1,300.5 $ 1,308.1 Specialty Engineered Materials $ 188.8 $ 157.2 APM pro forma adjustments - 2021 — 120.5 APM pro forma adjustments - 8 months 2022* 83.1 — Pro forma EBITDA $ 272.0 $ 277.8 Year Ended December 31, Reconciliation of Pro Forma Sales - Avient 2022 2021 Sales $ 3,396.9 $ 3,315.5 APM pro forma adjustments - 2021 — 396.5 APM pro forma adjustments - 8 months 2022* 256.1 — Pro forma sales $ 3,653.0 $ 3,712.0 5 AVNT Q4 2022 Earnings Presentation 2.17.pdf AVNT Q4 2022 Earnings Presentation.pdf IR Recs - 2.14 454pm

Avient reported strong Q3 results, with sales of $815 million, up 8% over the prior year (8.5% growth excluding the impact of foreign exchange). Adjusted EPS of $0.65 exceeded guidance and increased 14% year-over-year. Full-year adjusted EPS guidance range has been narrowed to $2.63-$2.67 (previously $2.55 to $2.70) and represents 11% to 13% growth in adjusted EPS over the prior year.

Adjusted EPS of $0.76 exceeded guidance and increased 21% year-over-year. Full-year adjusted EPS guidance range was raised to $2.55-$2.70. Revised guidance reflects 8% to 14% growth in adjusted EPS over the prior year.

Thermoplastic Composites: Hammerhead™ Marine Composite Panels Thermoset Composites: