Reconciliation to Adjusted EPS Excluding Special Items and Impacts of February 2020 Equity Offering Three Months Ended March 31, 2020 Net income from continuing operations – GAAP $ 33.1 Special items, after tax(1) 8.6 After tax interest income earned on equity proceeds, included in Interest expense, net (0.7) Adjusted net income excluding special items and impact of interest income on equity proceeds $ 41.0 Diluted weighted-average shares used to compute earnings per common share 86.7 Weighted-average impact of 15.3 million shares issued in February 2020 equity offering (9.3) Diluted weighted-average shares excluding impact of shares issued in February 2020 equity offering 77.4 Adjusted EPS - excluding special items and the net impact of equity offering $ 0.53 Reconciliation of Non-GAAP Financial Measures (Unaudited) (Dollars in millions, except per share data)

Matrix Resin Fiber Reinforcement Fiber Content, by Weight (%) Epoxy E-CR or E-Glass >70% MATERIAL TECHNICAL DATA Property Test Procedure Rod Diameter 1.25 in (31.75 mm) 1.50 in (38.10 mm) Glass Transition Temp (Tg) ASTM 1356 100°C Minimum 100°C Minimum Water Absorption 24 hours at 50°C (122°F) ASTM D570 0.03% 0.03% Short Beam Strength (ILSS) ASTM 2344 8,400 psi (58 MPa) 9,200 psi (64 MPa) Transverse Shear Strength ASTM 7617 23,400 psi (160 MPa) 24,640 psi (170 MPa) Traceability Lot number shall be clearly marked on each package/shipment.

GLOBAL REGULATORY COMPLIANCE Our regional tech centers around the world offer regulatory support and product stewardship expertise to help you qualify your products BIO-COMPATIBILITY APPLICATIONS Bio-compatible additives and colorants, tested under USP Class VI and ISO 10993, allow your materials to achieve required functional performance while meeting brand and color standards STERILIZATION REQUIREMENTS A standard color range and deliberate formulations provide stability under harsh sterilization methods AUTHENTICATION TECHNOLOGY Protect your brands with our Percept™ anti-counterfeit, security and tracking taggant technologies, or utilize radiopacifiers for placement protection LASER MARKING SOLUTIONS Optimized for color and contrast without diminishing physical property characteristics for branding, inventory management, data coding, or universal device identification PRODUCT & PROCESS OPTIMIZATION Maximize production throughput or eliminate waste with solutions including dimensional stabilization, cycle time reducers, chemical foaming agents, nucleation or hybrid technology ONCOLOR™ HC Colorants designed to be healthcare-friendly.

TECHNICAL BULLETIN Characteristics Artisan™ Nylon Solution Painted Metal Painted Plastic Traditional Molded-in Color Impact Modified Nylon PA Ionomer Alloy Aesthetic Very Good Excellent Excellent Good Very Good Very Good Scratch Appearance Excellent Poor Poor Good Excellent Excellent Scratch & Mar Resistance Very Good Excellent Excellent Poor Very Good Excellent Color Customization Good Excellent Excellent Very Good Good Good Stress Whitening Excellent Fair Fair Poor Excellent Excellent Weatherability Good Excellent Excellent Very Good Good Very Good Temperature Performance Good Excellent Fair Fair Fair Good Corrosion Resistance Excellent Fair Excellent Excellent Excellent Excellent Processability One Step Multi Step Multi Step One Step One Step Complex One Step Total Production Cost $$$ $$$$$ $$$$ $$ $$$ $$$$ Order Quantity Restrictions Some Some Some None More More COMPARISON OF NYLON, METAL, AND PLASTIC Properties Test Method Artisan™ AR6000-0007 HI UV* Gloss Level** Gloss reading at 60 degrees 80-93 Molding Shrinkage – Across Flow ASTM D955 0.009 to 0.013 in/in Tensile Strength (Yield) ASTM D638 7300 psi Tensile Strength (Break) ASTM D638 5300 psi Tensile Elongation (Yield) ASTM D638 6.0% Flexural Modulus ASTM D790 270500 psi Flexural Strength (Yield) ASTM D790 9950 psi Notched Izod Impact ASTM D256 -4°F (-20°C) 5 ft-lb/in 73°F (23°C) 11 ft-lb/in Unnotched Izod Impact ASTM D256 -4°F (-20°C) 29 ft-lb/in 73°F (23°C) 30 ft-lb/in Color & Aesthetics*** Green, medium blue, dark blue, red, orange, white, gray, black Color customization available based on specific needs KEY PROPERTIES Features: high-gloss finish, UV stability, scratch resistance, chemical/corrosion resistance, cold temperature impact resistance, heat resistance * Reflects average of several colors, properties shift slightly depending on color ** Gloss level varies based on tooling temperature *** UV data available upon request Copyright © 2023, Avient Corporation.

KEY CHARACTERISTICS ECCOH 5924 FORMULATION ECCOH 5981 FORMULATION ECCOH 5983 UV FORMULATION Material Standards BS7655-6, 1 (LTS1–4), BS6724, IEC 60502 BS7655-6, 1 (LTS3) BS7655-6, 1 (LTS1–4) Tear Strength at 23°C 7.7 N/mm 10 N/mm 11 N/mm Tear Strength at 65°C 2.3 N/mm 5 N/mm 6.5 N/mm Hot Pressure Test (6h at 90°C) 39% –

These colorants offer up to 10 hours of glow-in-the-dark effects in applications including toys, safety equipment and sporting goods.  Dynaflex™ Thermoplastic Elastomers

Product safety and regulatory compliance are key for applications using plastic materials where flammability is a consideration.   Dynaflex™ Thermoplastic Elastomers

Human Health & Safety Dynaflex™ Thermoplastic Elastomers

The demand for flame retardant engineered thermoplastics continues to grow, driven by increasing fire safety performance requirements across all industries. Dynaflex™ Thermoplastic Elastomers

Rosenau Page 84 United States 81% Europe Canada 15% Asia 2% 2011 Revenue: $0.9 Billion2011 Revenue: $0.9 Billion SolutionsSolutions At a Glance Performance Products and Solutions Europe 2% 2% $400 $600 $800 $1,000 $1,200 0.0% 2.0% 4.0% 6.0% 8.0% 10.0% 12.0% 14.0% 2006 2007 2008 2009 2010 2011 2015 S a le s ($ m il li o n s) O p e ra ti n g I n co m e % o f S a le s Operating Income % and Revenue 2011 Revenue by Industry Segment2011 Revenue by Industry Segment Expanding ProfitsExpanding Profits OI % of Sales Sales 9-12% Appliance 4% Building & Construction 30% Wire & Cable 17% Electrical & Electronics 2% Consumer 4% Packaging 9% Industrial 20% Misc. 2% HealthCare 2% Transportation 8% Textiles 2% Target Page 85 • Trend toward more affordable housing favors our product 1.5 2.0 2.5 Housing Starts (in million units) 50 year average Market Dynamics Performance Products and Solutions • Ultimate housing recovery presents substantial upside to already record- setting results Source: Historical Data from the US Census Bureau, 2012 estimate is a PolyOne projection. 0.0 0.5 1.0 '87 '89 '91 '94 '96 '98 '00 '02 '04 '06 '08 '10 '12 Page 86 Value Proposition • Premier provider of specialized vinyl and supply chain solutions, leading the industry in innovation and service Transformation Highlights • Management upgrades ensure that each PP&S business Value Proposition and Transformation Highlights Performance Products and Solutions • Management upgrades ensure that each PP&S business maximizes performance • Asset realignment and Lean Six Sigma reduce costs • Strengthened relationship with winning customers • Increased differentiation in all business units > $12B Addressable Market Page 87 Key Differentiators Performance Products and Solutions • Providing application design, material design and / or process design assistance not available from competitors • Capability to improve joint value streams • We are the best innovator in our space • We are the best innovator in our space • Expanding customers’ opportunities by providing innovative materials and marketing ideas • We provide world-class customer service and delivery performance Page 88 13.7% 14.3% 15.5% 9.9% 6.2% 5.4% 2006 2007 2008 2009 2010 2011 WC % of Sales • Best-in-class working capital management and delivery performance • Improved raw material Areas of Focus – Operational Excellence Performance Products and Solutions 2006 2007 2008 2009 2010 2011 89.1% 92.0% 94.2% 93.4% 93.4% 94.0% 2006 2007 2008 2009 2010 2011 On-Time Delivery • Improved raw material positions, sourcing savings • PolyOne pilot site for many LSS and manufacturing excellence programs *As measured to customer request date * Page 89 • reFlexTM Bioplasticizers Applications: Wide variety of flexible vinyl-based products • GeonTM HC for Healthcare � Applications: Medical device housings, specialty tubing � Customer benefits: Withstand aggressive antiseptics Key Innovations Performance Products and Solutions � Applications: Wide variety of flexible vinyl-based products � Customer benefits: Lower carbon footprint, improved productivity • GeonTM SF Super Flow � Applications: Large appliance parts, molded siding panels � Customer benefits: Flame retardancy, detergent resistance Page 90 Critical Imperatives and 2015 Goal Performance Products and Solutions Critical Imperatives • Accelerate innovation - grow in new applications not historically served with vinyl • Drive continuous improvement in manufacturing and working capital efficienciesworking capital efficiencies • Selectively leverage construction recovery 2015 Goal • 9 - 12% return on sales Page 91 Page 92