April 15, 2025 Aug 01, 2025 Jul 10, 2025

EBITDA margin 16.2% 2025 guidance Copyright © . All Rights Reserved 2025 21 ADJ. EPS - Full year 2025 $2.70 to $2.94 Q1 2025 $0.76 adj.

Leadership, EHS&S-PS, Facility Services, Design & Development, Information Technology, Sourcing, Logistics, Legal, and Human Resources Certificate No: 65537 Certification Date: 29 SEP 2023 Effective Date: 27 FEB 2025 Expiration Date: 27 SEP 2026 Revision Date: 05 MAR 2025 Dominic Townsend, President Copyright as of the Effective Date, ABS Quality Evaluations, Inc. Garibaldi 2405 , 1832 Lomas de Zamora, Argentina Avient Corporation Design and Manufacture of Colour and Additive Concentrates, Thermoplastic Resins and Specialty Compounds Rue Fond Jean Pâques 1, 1348 Louvain-La-Nueve, Belgium Avient Corporation Design and Manufacture of Colorants and Additives Concentrates and Specialty Compounds for Thermo Plastic Resin.

March 2025 - Final and Approved version.pdf Avient Corporation Corporate Governance Guidelines The Board of Directors (the “Board”) of Avient Corporation (the “Company”) has adopted the following Corporate Governance Guidelines (the “Guidelines”). March 14, 2025

The global antimicrobial plastics market is forecasted to grow signifi- cantly from 36.9 billion to 59.8 billion USD during 2020– 2025, a compound annual growth rate of 10.1%.[3] Similar to the specialty biocides market, the outbreak of COVID- 19 has undoubtedly increased consumer cognizance of high-touch plastic surfaces (e.g., phone cases, point-of- purchase equipment, shopping carts, etc.). The initial screening also included an evalua- tion of whether a stipple texture (T-2102) on the part sur- face plays any role in susceptibility to microbial growth. For ASTM G21-15, most polymer compounds also exhibited marginal or no change in fungal growth with the added texture, except for nylon-6; trace growth (rating = 1) was observed on the smooth surface while heavy growth (rating = 4) occurred on the textured sur- face.

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IATF Certificate Place and date: For the issuing office: Katy, TX, 22 May 2025 Revision 10 DNV - Business Assurance 1400 Ravello Drive, Katy, TX, 77449- 5164, USA Sherif Mekkawy Management Representative Lack of fulfilment of conditions as set out in the Certification Agreement may render this Certificate invalid. ACCREDITED UNIT: DNV Business Assurance USA Inc., 1400 Ravello Drive, Katy, TX, 77449-5164, USA - TEL: +1 281-396-1000. www.dnv.com Page 1 of 2 MANAGEMENT SYSTEM CERTIFICATE Certificate no.: 11229-2006-CHN-IATF IATF Certificate No: 0573810 Valid: 21 May 2025 – 20 May 2028 This is to certify that the management system of PolyOne - Suzhou, China EM Sector, 77 Shenggang Street, Suzhou Industrial Park, Suzhou, Jiangsu, China 215024 (USI: CF4943) and, if applicable, the remote supporting locations as mentioned in the Appendix accompanying this Certificate has been found to conform to the Quality Management System standard: IATF 16949:2016 This certificate is valid for the following scope: DESIGN AND MANUFACTURE OF PLASTIC COMPOUNDING MATERIAL EXCLUSION: NONE http://www.dnv.com Certificate no.: 11229-2006-CHN-IATF IATF Certificate No: 0573810 Place and date: Katy, TX, 22 May 2025 Lack of fulfilment of conditions as set out in the Certification Agreement may render this Certificate invalid.

January 28, 2025 Aug 01, 2025 Jul 10, 2025

Conventionally-Marketed Products Growth 2017-2022 Sustainability-Marketed Products Conventionally-Marketed Products Sustainably-marketed products account for 1/5 of the market share ... yet deliver 1/3 of growth 9% 4% CAGR Source: NY Stern School of Business 2023 MAKING RECYCLABILITY COMMITMENTS Avient Corporation 26 100% recyclable, compostable or reusable packaging by 2025 35% recycled content for all plastic packaging by 2025 30% recycled content by 2030 100% recyclable, compostable or reusable packaging by 2025 20% renewable and recycled plastics by 2025 100% recyclable, compostable or reusable packaging by 2025 To source 100% recycled or renewable resources 25% recycled content by 2025 80% of waste recycled back into Nike products and other goods by 2025 25% recycled content by 2025 100% recyclable, compostable or reusable packaging by 2025 BRAND-SPECIFIC RECYCLED CONTENT ANNOUNCEMENTS x …the entire DASANI product lineup will be made from recycled plastic. Colgate-Palmolive, March 2021 Avient Corporation 27 2020 2030 12% CAGR RECYCLED PLASTICS DEMAND GROWING DOUBLE DIGITS Avient Corporation 28 Sources: McKinsey, Standard & Poor’s 2022 • Recycled plastics demand is expected to grow at a 12% CAGR through 2030 • Demand is constrained by availability of recycled content and will need investments in both mechanical and chemical processes • As recycled content becomes more available, it is expected to make up 30% of all plastics demand by 2040 Recycled Plastics Virgin Plastics Growing Demand for Recycled Content 3% CAGR MAKING CARBON EMISSIONS COMMITMENTS Avient Corporation 29 100% renewable energy consumption by 2025 50% reduction in product carbon footprint by 2030 Reduce absolute emissions by 25% before 2030, net zero by 2025 Net zero carbon emissions by 2050 Achieve carbon neutrality globally by 2050 Achieve net zero greenhouse gas emissions across enterprise Reduce carbon emissions by 75% by 2030 Achieve net zero emissions by 2040 Reduce greenhouse gas emissions by 0.5M tons by 2025; net zero by 2050 Reach net zero greenhouse gas emissions by 2040 Achieve zero emissions across global operations by 2040 Avient Corporation 30 STAKEHOLDERS’ GROWING INFLUENCE Source: Deloitte 2022 Regulators & government 77% Board members & management 75% Consumers & clients 75% NGOs 72% Shareholders & investors 71% Competitors & peers 66% Employees 65% Percent of Companies Feeling Pressure From… Lenders 55% GOVERNMENT INFLUENCE CREATES OPPORTUNITIES Avient Corporation 31 65% Reduction in carbon emissions per unit of GDP from China by 2030 LOW CARBON FOOTPRINT MATERIALS 25X Increase in offshore wind energy capacity in the E.U. by 2030 INFRASTRUCTURE SOLUTIONS 10% Fuel efficiency increase in 2026 model year vehicles to achieve 49 MPG 90% Replacement of fossil-based plastics with bio-based polymers (Biden Administration) LIGHTWEIGHTING SOLUTIONS BIOPOLYMERS $42B Investment in U.S. infrastructure requiring 100% of fiber optic cable to be U.S. Manager Equipment Control - KLM-Martinair Avient Corporation 60 18 27 0 5 10 15 20 25 30 35 40 45 50 2023 2026 2029 2032 EMEA APAC Americas 11% CAGR 38 49 53 58 30 35 40 45 50 55 60 2023 2026 2029 2032 Source: NHTSA, Reuters Source: BloombergNEF Global Offshore Wind Installations M ile s P er G al lo n An nu al In st al la tio ns (i n Gi ga w at ts ) 1.