Sequeira joined Avient in May 2024, bringing nearly 25 years of experience in information technology to this role. There, he drove a new technology go-to-market strategy that created competitive advantage, including leading the adoption of advanced technologies such as robotics, AI, and cutting-edge cybersecurity tools and frameworks.

All Rights Reserved 2024 Amplify innovation across portfolios 1 Hybridize technologies 2 create capacity and capability in R&D 3 18Copyright © . Catalyze the core” – leverage broad technology portfolio, applications expertise, and global footprint and capabilities 2. Focusing on driving growth in composites – building new platforms with scale and differentiated technology 3.

Examples include: • Dyneema®, the world's strongest fiber™, enables unmatched levels of performance and protection for end-use applications, including ballistic personal protection, marine and sustainable infrastructure and outdoor sports • Unique technologies that improve the recyclability of products and enable recycled content to be incorporated, thus advancing a more circular economy • Light-weighting solutions that replace heavier traditional materials like metal, glass and wood, which can improve fuel efficiency in all modes of transportation and reduce carbon footprint • Sustainable infrastructure solutions that increase energy efficiency, renewable energy, natural resource conservation and fiber optic / 5G network accessibility Avient is a certified ACC Responsible Care® and a founding member of the Alliance to End Plastic Waste. WHAT WE DO: MATERIAL SCIENCE 5 CUSTOM FORMULATION M AY 3 , 2023 W EB CAS T Keeping Safety First o Relentless focus on best-in-class safety performance as an ACC Responsible Care® organization Exceeding Customer Expectations o Complementary technologies and customer relationships offer opportunity for future revenue synergies o Proven innovation-led commercial strategy with strong brands and participation across the full value chain Collaboration in Innovation o Leveraging Dyneema®, the world’s strongest fiber™, to accelerate growth of sustainable, ultralight and high performance applications People – Culture is Everything o Talented, passionate and collaborative associates drive an effective integration strategy o Strong Great Places to Work® scores reflect positive integration efforts in first year AVIENT PROTECTIVE MATERIALS INTEGRATION 7 AVIENT PROTECTIVE MATERIALS K E Y I N D U S T R I E S PERSONAL PROTECTION Military • Law Enforcement • First Responders • Body Armor • Helmets • Vehicle Protection 50% MARINE & SUSTAINABLE INFRASTRUCTURE Towing / Mooring • Aquaculture • Floating Wind • Offshore Cranes 30% CONSUMER Consumer • Outdoor High Performance • Safety Equipment 20% 8 Figures reflect approximate proportions of 2022 sales Q 1 P ER FO RM A N CE Q1 2023 PERFORMANCE VS. FX -11% FX -3% Total Avient -14% YoY Comparison against 2022 pro forma results • Aging infrastructure driving need for greater technological advancements and upgrades • Increased focus on strength and capacity of electrical grid plays into further adoption of composites into the market Where Avient Wins:  UV, weather-resistance, customized capabilities  Best-in-class customer responsiveness  Local high-quality manufacturing, unparalleled breadth of portfolio  Expanding position in insulators, utility poles, crossarms, and wind energy Avient Confidential 15 ENERGY 15 • Fiber-optic investments from AT&T, Corning, Commscope continue to drive industry toward innovation • $42B BEAD program in Infrastructure Bill to increase cable deployments; well-positioned to capitalize on “Made in America” requirement and “last mile” buildout Where Avient Wins:  Flame retardance, weather-resistance enables faster, safer, more reliable connections  Local manufacturing, unparalleled breadth of portfolio  Expanding position in insulation for wire jacketing, 5G buildout TELECOMMUNICATIONS Source: U.S.

NAME BASE RESIN(S) TARGET MARKETS AVAILABLE FEATURES1 Artisan™ Pre-Colored Thermoplastics PA Powersports, Lawn & Garden, Marine Customizable pre-color solutions Scratch & mar resistance Weatherability & UV resistance High impact resistance Chemical resistance Simplifies processing/replaces paint Tailored temperature performance range: -20°C to 105°C Global availability Complēt™ OnForce™ PA, PP, PPA, PPS, TPU Consumer, Transportation, Industrial Long fiber technology Elevated impact and mechanical properties at room temperature Increased performance at temperature extremes Excellent creep and fatigue resistance Glass and carbon fiber filled options Lubricated, fire retardant, and pre-colored options Edgetek™ Bergadur™ ABS, LCP, PA, PC, PC/ABS, PC/PBT, PC/PET, PC/PSU, PEEK, PES, PEI, POM, PPA, PPS, PSU Consumer, Transportation, Industrial Strength and durability Chemical resistance High impact resistance Weatherability Flame retardant grades: UL 94 V-0, V-1, V-2, and 5VA Pre-color solutions Lightweighting 5G properties - Dk/Df and 3D/LDS Gravi-Tech™ PA, TPU, TPE, PBT Consumer, Transportation, Industrial Customized density, from 1.5 to 11 gm/cm3 Broad modulus and strength: flexible to rigid Chemical and corrosion resistance Gravi-Tech™ LD light density grades available LubriOne™ PA, PBT, PC, PEEK, PEI, POM, PP, PPA, PPS, PS Transportation, Electrical & Electronics, Industrial Low coefficient of friction Self-lubricating Chemical, wear, and corrosion resistance Maxxam™ PP Consumer, Transportation, Electrical & Electronics, Industrial Homopolymer and copolymer grades Optional additives: UV, heat stabilizers Standard grades available in natural and black Maxxam™ FR PE, PP Consumer, Transportation, Electrical & Electronics, Industrial Flame retardant grades: UL 94 V-0, V-1, V-2, and 5VA Flame retardant masterbatches Elevated UL RTI ratings Halogen-free flame retardant grades available Nymax™ Nymax™ PIR Bergamid™ PA 6, 66, 612, 12, co-polymers Transportation, Building & Construction, Electrical & Electronics Toughened grades: medium and high impact Optional additives: heat stabilized, lubricated, impact modified, nucleated Standard grades available in natural and black Pre-colored solutions available PIR grades with 20%–100% recycled content, supporting the circular economy SPECIALTY ENGINEERED THERMOPLASTICS 1 See technical data sheets for complete product details 1 See technical data sheets for complete product details 2 From NEU™ Specialty Engineered Materials, LLC., a wholly-owned subsidiary of Avient Corporation NAME BASE RESIN(S) AVAILABLE FEATURES1 Trilliant™ ABS, LCP, PA, PC, ABS, PA 6, PA 66, PC/ABS, PC/PSU, PEBA, PEEK, PES, POM, PPA, PSU Certified to USP Class VI Formulations locked down Drug master file submissions by product stewardship Pre-colored, small lot production down to 50 lb–250 lb Sterilization, chemical resistance, and secondary process guidance Adherence to FDM-GMP manufacturing standards Antimicrobial technologies Materials for radiation shielding protection NEU™ Specialty Materials2 PEBA, TPU, PA 11, PA 12, PP, PE, TPE Radiopacifiers, stabilizers, and surface modifiers Antimicrobial technologies Pre-colored formulations Small lot capabilities Short lead times Versaflex™ HC TPE Overmolding Clear and heat resistant Ultra clear grades Ultra soft TPE gels, 30 shore OO FDA, USP Class VI, ISO 10993 approved grades Sterilizable under autoclave, radiation, and EtO gas Extrusion, injection, and blow moldable HEALTHCARE SPECIALTY THERMOPLASTICS NAME BASE RESIN(S) TARGET MARKETS AVAILABLE FEATURES1 reSound™ R Recycled Formulations PA6, PA66, PC Transportation, Consumer, Household Appliance, Electrical & Electronics, Industrial PA grades: Up to 100% recycled content PC grades: Up to 70% recycled content PIR and PCR grades available Support the circular economy Comparable performance to prime grades Customizable solution Surround™ ABS, PP, PBT, PC, PA 66 Transportation, Electrical & Electronics Integrated EMI/RFI shielding Long fiber technology Conductive properties Galvanic corrosion protection Lightweighting and ease of processing Stat-Tech™ ABS, PA, PC, PC/ABS, PC/PSU, PEEK, PEI, PES, PP, PPA Transportation, Electrical & Electronics Integrated EMI/RFI shielding Conductive properties Anti-static/dissipative properties Corrosion resistance Lightweighting and ease of processing Clean room materials for semiconductors available Therma-Tech™ LCP, PA, PEEK, PP, PPA, PPS Consumer, Transportation Thermally conductive Low coefficient of thermal expansion Corrosion resistance SPECIALTY ENGINEERED THERMOPLASTICS NAME BASE RESIN(S) TARGET MARKETS AVAILABLE FEATURES1 Barricade™ Elastomers with Fortrex™ Technology Barricade™ high-performance elastomers bring next genera- tion technology to market to bridge the gap between tradi- tional TPEs and silicone Healthcare, Industrial Aerospace, Appliances, Electronics High temperature compression set Processes on thermoplastic injection molding and extrusion equipment Customizable and colorable Process simplicity CROSSLINKABLE ELASTOMERS Barricade formulations leverage licensed Fortrex™ technology. Consumer, Packaging, Healthcare, Electrical & Electronics, Appliance Overmolding Clear and heat resistant TPEs Ultra clear grades Ultra soft TPE gels, 30 shore OO FDA, USP Class VI, ISO 10993 approved grades NSF and UL listings Sterilizable under autoclave, radiation, and EtO gas Extrusion, injection, and blow moldable GLS™ THERMOPLASTIC ELASTOMERS * Commercially available in North America only 1 See technical data sheets for complete product details NAME BASE RESIN(S) AVAILABLE FEATURES1 ECCOH™ Polyolefin Flame retardant, low smoke and fume, zero halogen (LSFOH) Cross-linkable grades Chemical, oil, and gel resistant Flexible, low friction, easy-peel, and high speed processing Compatible with Avient additives and color masterbatches FireCon™ CPE, CPE Alloy Low and medium voltage cable jacketing Flame retardant and 90°C deformation resistance Oil resistance RoHS grades available Maxxam™ FR PE, PP UL Yellow Card for plenum applications Halogen-free flame retardant grades available Maxxam™ SY Foamable PP co-polymer Easy processing Variety of final densities available Corrosion resistance Syncure™ XLPE High performance moisture cure technology UL bulletinized XHHW2 and VW1 Temperature, abrasion, and oil resistant WIRE AND CABLE SPECIALTY THERMOPLASTICS To learn more, please visit avient.com or call +1.844.4AVIENT (+1.844.428.4368).

A recording of the webcast and the slide presentation will be available at avient.com/investors/events-presentations immediately following the conference call and will be accessible for one year. Unique technologies that improve the recyclability of products and enable recycled content to be incorporated, thus advancing a more circular economy Tax adjustments include the net tax benefit/(expense) from one-time income tax items, the set-up or reversal of uncertain tax position reserves and deferred income tax valuation allowance adjustments.

Check only one of the following seven boxes. Note: If the account is in more than one name, see the instructions for line 1.

I supply to more than one organization. There is also the possibility to merge multiple of your accounts into one. mailto:notifications@avient-communications.com mailto:notifications@avient-communications.com mailto:coupaenablement@avient.com What do I do if I forget my CSP password or I am locked out?

Note: You can only enter one tracking number on a PO. To edit a draft ASN or update one in pending receipt status, click on the Edit icon in the Advance Ship Notices table.

COLORANTS & ADDITIVES FOR HEALTHCARE Essential polymer solutions for critical healthcare applications WHEN MATERIAL EXPERTISE IS CRITICAL AESTHETIC APPEAL Regulatory compliant and approved masterbatch colors use custom polymer colorants to achieve any shade SPECIAL EFFECTS Enhance your brand and stand apart with pearlescent, metallic, iridescent, fluorescent or thermo-chromatic effects SOLID TO LIQUID SOLUTIONS Choose from a full range of available color solutions, from liquid color to solid product forms ANTIMICROBIALS Efficacy performance and regulatory requirements are met in a wide range of resins compatible with Withstand™ antimicrobial technology SURFACE ENERGY MODIFICATION Additive technologies such as low retention, hydrophobic, lubricious, light diffusion, or anti-stat provide desired surface manipulation Materials used for today’s medical devices, parts and pharmaceutical packaging contribute significantly to performance and, in turn, to a patient’s health and well-being. 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.

Reporting of violations of the Code of Ethics Should situations arise that cause a potential conflict of interest for any one of these officers, then the details of the circumstances of the potential conflict of interest must be reported (including self-reporting) immediately to the General Counsel, the Chair of the Audit Committee and the independent auditor.