Copyright © . 2024 23 Diverse technology portfolio Commercial excellence, financial rigor & prudence Culture of safety and sustainability FOUNDATIONAL STRENGTHS Unwavering customer focus Global reach with a local touch Innovation Digital for Operational Excellence and Growth Leadership, talent STRATEGIC DRIVERS OUR PURPOSE Innovator of materials solutions to help our customers succeed, while enabling a sustainable world STRATEGIC APPROACH Intersecting high growth markets and secular trends with our technologies to create product platforms of scale Catalyze the core Build new platforms of scale GROWING AT GDP+ GROWING AT 10% PLUS CAGR Copyright © . 2024 24 Redesigning organizations & compensation to drive strategy Compensation • Designed a new compensation plan directly to our strategy execution Colors, and Inks Specialty R&D Research and Development New business development & marketing excellence • New SVP hired • Reorganized under a single global leadership eliminated structure and complexity “play to win” focused organizations for growth vectors up front • New CTO hired Copyright © . 2024 25 Strong and committed team leading the change Leslie Sequeira Chief Information Officer SVP and Chief Financial Officer Joel Rathbun SVP Mergers & Acquisitions SVP and President Color, Additives and Inks SVP and President Specialty Engineered Amy Sanders SVP, General Counsel and Secretary Kyle Rose VP, Corporate Communications John Midea SVP, Global Ops and Process Improvement Kristen Gajewski SVP and Chief Human Resources Officer ALSO HERE TODAY Phil Clark SVP and Chief Technology Officer ALSO HERE TODAY Mike Irwin SVP, New Business Development and Marketing Excellence Color, Additives and Inks SEGMENT STRATEGIC REVIEW Copyright © . 2024 28 Solutions provider of customized color and functionality to enhance and improve polymers Color, Additives and Inks – an overview 34% 37%21% 8% US, Canada Europe, Middle East, Africa Latin America $2.0B • Differentiate and enhanced aesthetic appeal of our customers’ products • Enable sustainability through our solutions • Safeguard and preserve packaged contents • Extend product shelf life KEY E N D MARKETS PACKAGING CONSUMER HEALTHCARE BUILDING & CONSTRUCTION INDUSTRIAL TRANSPORTATION Copyright © . 2024 29 Our value we know color color designs completed annually 400,000 color formulations manufacturing footprint in industry 550 commercial resources globally serving locally we are global we innovate 18,000 sustainable solutions broadest portfolio in industry 14,500 additives solutions and growing Copyright © . 2024 30 Portfolio of CAI solutions Solid Colorants Liquid Recycling solutions Barrier enhancements Surface modifiers Plastisol Water-based Bio-based Silicone dispersion Vinyl formulations Specialty coatings Advanced dispersionsScreen printing inks Copyright © . 2024 31 CAI sales growth faster response to customer needs tailored to local needs...globally enhance service with digital tools Copyright © . 2024 32 Personalized, self-administered 32 CAI PORTFOLIO Copyright © . 2024 33 • Regulatory compliance • Reliable material quality and uninterrupted supply • Supply chain risk mitigation • Global reach $6B ADDRESSABLE MARKET AVIENT VALUE PROPOSITION • ISO 13485 accredited sites • Globally approved raw material portfolio • Strict change management • Global supply Auto injectors Syringes Inhalers OTHER APPLICATONS • In-vitro diagnostics • Remote monitoring • Pharma packaging • Catheters • Medical equipment Copyright © . 2024 34 • Reducing material and energy usage • Achieving sustainability goals and objectives • Improved product performance, structural integrity $5B ADDRESSABLE MARKET AVIENT VALUE PROPOSITION • Best-in-class additives for a wide range of polymer processing temperatures • Design services to simulate foaming and mold designs TransportationWood plastic composite decking Bottles and food packaging Building and Copyright © . 2024 35 • 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 OTHER APPLICATONS • Electrical connectors • Labware • Food contact appliances Flexible film Artificial turf Food storage, oil containers 36Copyright © .

Much of this waste comes from single-use plastic packaging, so would eliminating it solve the problem?

Graphene is a flat, single layer of carbon atoms in sheet form that is significantly stronger than steel.3 It has a high surface area-to-volume ratio, high tensile strength (how much it can stretch before it breaks), and high electron mobility (the speed at which its electrons move when voltage is applied).4 Graphene is not a new material, but it recently became commercially available and is now being used as a polymer additive.

None of the agreements contain a single trigger or a modified single trigger for benefits. Avient and some brokers household proxy materials, delivering a single proxy statement to multiple shareholders sharing an address unless contrary instructions have been received from the affected shareholders. Avient will deliver promptly upon written or oral request a separate copy of our Annual Report on Form 10-K for the fiscal year ended December 31, 2023, Proxy Statement or Notice of Internet Availability of Proxy Materials, as applicable, to a shareholder at a shared address to which a single copy of the documents was delivered.

Laser-marking additive, an authentication additive, and colorant— bundled into a single Smartbatch™ concentrate 

More Reducing Costs in Solar Wiring This single-layer jacket amps up photovoltaic wire offering for a leading manufacturer.

In addition, we store sensitive data, including proprietary business information, intellectual property and confidential employee or other personal data, on our servers and databases. Any such provision is recognized using the Company's best estimate of the amount of loss incurred, or at the lower end of an estimated range, when a single best estimate is not determinable Any such provision is recognized using the Company's best estimate of the amount of loss incurred, or at the lower end of an estimated range, when a single best estimate is not determinable.

In addition, we store sensitive data, including proprietary business information, intellectual property and confidential employee or other personal data, on our servers and databases. Any such provision is recognized using the Company's best estimate of the amount of loss incurred, or at the lower end of an estimated range, when a single best estimate is not determinable. Any such provision is recognized using the Company's best estimate of the amount of loss incurred, or at the lower end of an estimated range, when a single best estimate is not determinable.

Garratt Senior Vice President, President of Performance Products & Solutions John Midea Senior Vice President, Global Operations & Process Improvement Mark Crist Senior Vice President, President of PolyOne Distribution Cathy Dodd Vice President, Marketing Chris Murphy Vice President, Research & Development, Chief Innovation Officer Kurt Schuering Vice President, Global Key Account Management The Leaders Behind the Team PolyOne Corporation Page 8 Commodity to Specialty Transformation • Volume driven, commodity producer • Heavily tied to cyclical end markets • Performance largely dependent on non- controlling joint ventures 2000-2005 2006 - 2009 2010 – 2014 2015 and beyond • Steve Newlin appointed, Chairman, President and CEO • New leadership team appointed • Implementation of four pillar strategy • Focus on value based selling, investment in commercial resources and innovation to drive transformation • Substantial EPS growth from $0.13 to all-time high of $1.80 • Shift to faster growing, high margin, less cyclical end markets • Key acquisitions propel current and future growth, as well as margin expansion • Specialty mix expands to 65% of Operating Income – strongest mix of earnings in history • Accelerating growth • Deliver consistent double digit annual EPS growth • Maintain >35% vitality index • Pursue strategic acquisitions that expand specialty offerings and geographic breadth • Invest and grow current and next generation talent PolyOne Corporation Page 9 2006 2014 “Where we were” “Where we are” Operating Income % Specialty: Global Color, Additives & Inks 1.7% 14.7% Global Specialty Engineered Materials 1.1% 12.1% Designed Structures & Solutions 1.4%(2012) 7.3% Performance Products & Solutions 5.5% 7.7% Distribution 2.6% 6.1% Specialty Platform % of Operating Income 6.0% 65% ROIC 5.0% 11.3% Adjusted EPS Growth N/A 37% Proof of Performance PolyOne Corporation Page 10 2% 34% 43% 62% 65% 0% 20% 40% 60% 80% 100% 2005 2008 2010 2013 2014 % o f O pe ra tin g In co m e* JV's Performance Products & Solutions Distribution Specialty Old PolyOne Mix Shift Highlights Specialty Transformation New PolyOne Transformation Specialty OI $5M $46M $87M $195M $242M *Operating Income excludes corporate charges and special items PolyOne Corporation Page 11 2014 2015 Target “Where we are” (Est. in 2012) Operating Income % Specialty: Global Color, Additives & Inks 14.7% 12 – 16% Global Specialty Engineered Materials 12.1% 12 – 16% Designed Structures & Solutions 7.3% 8 – 10% Performance Products & Solutions 7.7% 9 – 12% Distribution 6.1% 6 – 7.5% Specialty Platform % of Operating Income 65% 65 – 75% ROIC 11.3% 15% Adjusted EPS Growth 37% Double Digit Expansion Proof of Performance PolyOne Corporation Page 12 • Sold non-core resin assets – EPS dilutive • Completed acquisition of Spartech • Housing starts below 1.25 million units Single family units 30% below expectations • Longstanding weakness in Europe, and decline in Euro Successfully Navigating Change Since 2012 PolyOne Corporation Page 13 -100% 200% 300% 400% 500% 600% POL S&P 500 Strategy and Execution Drive Results $0.12 $0.27 $0.21 $0.13 $0.68 $0.82 $1.00 $1.31 $1.80 '06 '07 '08 '09 '10 '11 '12 '13 '14 ‘06-‘14 Adjusted EPS CAGR = 40% Adjusted EPS Share Price vs.

Yet no single year in our company’s history did such a monumental specialty portfolio transformation take place than in 2019.