Avient Corporation (NYSE: AVNT), with expected 2021 revenues of $4.6 to $4.7 billion, provides specialized and sustainable material solutions that transform customer challenges into opportunities, bringing new products to life for a better world.

PolyOne Corporation, with 2017 revenues of $3.2 billion, is a premier provider of specialized polymer materials, services and solutions.

Delivering specialized thermoplastic elastomer solutions for demanding healthcare applications

OnColor™ FX Special Effect Colorants

About PolyOne PolyOne Corporation, with 2016 revenues of $3.3 billion, is a premier provider of specialized polymer materials, services and solutions.

PolyOne Corporation (NYSE: POL), with 2018 revenues of $3.5 billion, is a premier provider of specialized polymer materials, services and solutions.

OnColor™ FX™ Special Effect Colorants OnColor™ FX Special Effect Colorants Delivering specialized thermoplastic elastomer solutions for demanding healthcare applications

This includes many preventive tools and resources, as well as special events hosted globally, like our annual PolyOne Fun Run and Walk. Kunkle APPENDIX A 2009* 2010* 2011* 2012* 2013* 2014* 2015* 2016** 2017** 2018** 2018*** 2019*** Net income from continuing operations attributable to PolyOne common shareholders $106.7 $152.5 $153.4 $ 53.3 $ 94.0 $ 78.0 $144.6 $166.4 $173.5 $161.1 $ 87.7 $ 75.5 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 23.8 32.9 59.5 58.7 61.7 Special items, tax adjustments(1) (27.2) (96.7) (24.7) (18.9) (13.7) (73.7) (58.7) (15.9) (24.8) (25.3) (25.1) (5.9) Adjusted net income from continuing Adjusted net income from continuing operations attributable to PolyOne common shareholders $ 11.8 $ 65.3 $ 76.9 $ 89.5 $126.6 $168.5 $173.5 $174.3 $181.6 $195.3 $121.3 $131.3 Diluted shares 93.4 96.0 94.3 89.8 96.5 93.5 88.7 84.6 82.1 80.4 80.4 77.7 Adjusted EPS attributable to PolyOneAdjusted EPS attributable to PolyOne common shareholders $ 0.13 $ 0.68 $ 0.82 $ 1.00 $ 1.31 $ 1.80 $ 1.96 $ 2.06 $ 2.21 $ 2.43 $ 1.51 $ 1.69 Year Ended December 31, Reconciliation to Consolidated Statements of Income 2019 2018 Operating income - GAAP $ 156.8 $ 178.6 Special items in operating income (1) 71.7 42.4 Operating income adjusted $ 228.5 $ 221.0 APPENDIX B POLYONE CORPORATION 2020 EQUITY AND INCENTIVE COMPENSATION PLAN 1.

All Rights Reserved 2024 35 Non-PFAS functional additives MARKET DRIVERS & NEEDS • Regulatory restrictions with the removal of PFAS in multiple end markets • Major retailers requiring PFAS content declaration from suppliers • Enhanced plastic properties, aesthetics and processability • Specialized functionalities making plastics a safe option in demanding applications $8B ADDRESSABLE MARKET AVIENT END MARKETS, APPLICATIONS OTHER APPLICATONS • Electrical connectors • Labware • Food contact appliances BUILD NEW PLATFORMS OF SCALE Flexible film Artificial turf Food storage, oil containers 36Copyright © . Year Ended December 31, Reconciliation to EBITDA and Adjusted EBITDA: 2006 2023 Sales $ 2,622.4 $ 3,142.8 Net income from continuing operations – GAAP $ 133.5 $ 76.3 Income tax expense 29.7 11.0 Interest expense, net 63.1 115.3 Depreciation and amortization from continuing operations 57.1 188.8 EBITDA from continuing operations 283.4 391.4 Special items, before tax (34.0) 114.6 Interest expense included in special items — (2.3) Depreciation and amortization included in special items — (1.9) JV - equity income (107.0) — Adjusted EBITDA $ 142.4 $ 501.8 Adjusted EBITDA as a percent of sales 5.4 % 16.0 % 1 Avient Investor Day_Dec 2024_Wednesday morning edition.pdf Investor Day - Dec24 - Non-GAAP v4 12.03.24 545PM.pdf Attachment

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. V I S I O N PolyOne Corporation 4 To be the world’s premier provider of specialized polymer materials, services and solutions C O R E V A L U E S P E R S O N A L V A L U E S Honesty IntegrityRespect Operational Excellence Commercial Excellence Specialization Globalization Collaboration ExcellenceInnovation To be the world’s premier provider of specialized polymer materials, services and solutions S A F E T Y F I R S T PolyOne Corporation 5 Injuries per 100 Workers Spartech Acquisition 1.3 1.1 1.1 0.85 0.65 0.57 0.54 0.97 0.84 0.74 0.74 0.69 0.51 2006 2007 2008 2009 2010 2011 2012 2013 2014 2015 2016 2017 2018 PolyOne Corporation 6 P O L Y O N E P R O F O R M A 2 0 1 8 R E V E N U E | $ 2 . 9 B I L L I O N * Segment End Market Geography Transportation 15% Healthcare 15% Industrial 14% Packaging 13% Consumer 12% Wire & Cable 11% Building & Construction 6% Electrical & Electronics 6% Textiles 5% Appliance 3% Color Additives & Inks 34% Distribution 41% Specialty Engineered Materials 25% United States 54% Europe 20% Asia 11% Latin America 10% Canada 5% *Pro Forma excluding PP&S and including Fiber-Line PolyOne Corporation 204 P R O O F O F PER FO R MA N C E C O N S E C U T I V E Y E A R S 10 A D J U S T E D E P S E X P A N S I O N $1.51 $1.61 S U S T A I N A B L E P A T H T O D O U B L E - D I G I T E P S G R O W T H PolyOne Corporation 8 P E O P L E P R O D U C T S P L A N E T P E R F O R M A N C E Double digit annual EPS growth Expand specialty portfolio with strategic acquisitions Innovate and develop new technologies and services Repurchase 600K-1M shares annually Increase commercial resources 5-7% annually Double acquired company margins Enhance efficiencies through Lean Six Sigma and commercial excellence 531 710130 164 504 663 2014 2018 R&D / Technical Marketing Sales PolyOne Corporation 9 Increased commercial headcount + 34% + 26% + 32% I N V E S T M E N T I N COMMERCIAL RESOURCES D R I V I N G G R O W T H Sustained revenue increases led by organic business $2.9 $2.9 $3.2 $3.5 2015 2016 2017 2018 Total + 9% Organic + 5% Revenue in billions of $ Total + 10% Organic + 7% Lead Specialists T H E E V O L V I N G C U S T O M E R R E L A T I O N S H I P PolyOne Corporation 10 Expanded Path Traditional Path Strategic Accounts/ Field Sales Business Development Customer Service Web and Social Media Inside Sales PolyOne Corporation 11 Investments in digital and dedicated inside sales to improve customer experience 110% increase in leads (from 6,000 to 12,700) driven by website, phone, and online chat EXPANDED PATH A D D I N G C U S T O M E R T O U C H P O I N T S 4 24 2014 2018 Inside sellers $11M $109M 2014 2018 Inside sales/digital revenue A L I G N I N G W I T H T R E N D S F O R G R O W T H T R A N S P O R T A T I O N P A C K A G I N G H E A L T H C A R E C O N S U M E R PolyOne Corporation 12 Facilitate alternative energy solutions Light- weighting Reduce packaging materials Improve recyclability Reduce spread of infection I N N O V A T I O N PolyOne Corporation 13 Customization 55% M&A 30% Innovation Pipeline 15% Innovation comes from Research & Development Spend ($ millions) Vitality Index % of sales from products launched last 5 years 12% 35% 2006 2018 $20 $56 2006 2018 Transformational Opportunity for Growth Through M&A Adjacent Opportunity for Growth Through New Product Pipeline Core Customization 3 H O R I Z O N S O F D E V E L O P M E N T PolyOne Corporation 14 Incremental development from existing base of technology New development adjacent to current technology New technology development outside of and with our current base Service adjacent markets and customers Create new markets, target new customer needs Service existing markets and customers Market Technical I N N O V A T I O N Non-Halogen Flame Retardants Barrier Technologies Fiber Colorants Advanced Composites Thermoplastic Elastomers Gordon Composites/ Polystrand – Composites GLS – Thermoplastic Elastomers ColorMatrix – Liquid Color & Additives PlastiComp Fiber-Line I N N O V A T I O N S P O T L I G H T : C O M P O S I T E S PolyOne Corporation 15 C O M P O S I T E S R E F R E S H E R PolyOne Corporation 16 Fiber Polymer Composite Strength Design Flexibility Continuous Fiber Thermoset Composites Short Glass Fiber Thermoplastics Continuous Fiber Thermoplastic Composites Long Glass Fiber Thermoplastics S T R A T E G I C I N V E S T M E N T H I S T O R Y Acquired Polystrand Installed LFT production Avon Lake Acquired Gordon Composites Thermoplastic Composites Long Fiber Reinforced Thermoplastics Continuous Fiber Thermosets Long Fiber Thermoplastic (LFT) Technology Installed LFT production Barbastro, Spain Acquired Glasforms Long Fiber Reinforced Thermoplastics Continuous Fiber Thermosets 2012 2015 20162009 2011 Acquired PlastiComp, specialty LFT producer 2018 PolyOne Corporation 2019 Acquired Fiber-Line, specialty fiber processor 17 C O M P O S I T E S I N T R A N S P O R T A T I O N PolyOne Corporation 18 W A T E R C R A F TR A I L H E A V Y T R U C K Bulkheads and Transoms Ceilings and Hatches Doors and Cabinetry Flooring Door Panels Side Walls Flooring & Side Panels Aerodynamic Fairings Seat and Bunk Reinforcements P O L Y O N E A P P L I C A T I O N S I N F I B E R O P T I C C A B L E S PolyOne Corporation 19 1.