This advanced additive also enables customers to preserve electrical properties while reducing insulation thickness and raw material consumption through a consistent closed cell structure. Tight Tolerances: Enhanced dispersion of active foaming ingredients produces a consistent cell structure of 200 micron or less insulation thickness and density are reduced without adversely effecting electrical, chemical or thermal properties

Energy: o Diesel Fuel Consumption: 7,268,012 kWh o Natural Gas Fuel Consumption: 90,498,342 kWh o Renewable Energy - Self Generated (solar): 252,779 kWh o Renewable Energy - Self Generated (Wind): 2,399,531 kWh o Electric Power: 339,815,274 kWh Page 2 WATER RESOURCES • ENVIRONMENTAL SERVICES • HEALTH & SAFETY • CLIMATE CHANGE Apex Companies, LLC • (800) 733-2739 • www.apexcos.com o Renewable Energy Credit (REC): 121,411,062 kWh o Renewable Power – Offsite: 27,119,749 kWh Period covered by GHG emissions verification:  January 1, 2021 to December 31, 2021 GHG Reporting Protocols against which verification was conducted:  World Resources Institute (WRI)/World Business Council for Sustainable Development (WBCSD) Greenhouse Gas Protocol, Corporate Accounting and Reporting Standard, Revised Edition (Scope 1 and 2) and the GHG Protocol Scope 2 Guidance, an amendment to the GHG Protocol Corporate Standard  WRI/WBCSD Corporate Value Chain (Scope 3) Accounting and Reporting Standard Verification Protocols used to conduct the verification:  ISO 14064-3 Second Edition 2019-04: Greenhouse gases - Part 3: Specification with guidance for the verification and validation of greenhouse gas statements  Apex’s standard procedures and guidelines for external Assurance of Sustainability Reports and International Standard on Assurance Engagements (ISAE) 3000 Revised, Assurance Engagements Other than Audits or Reviews of Historical Financial Information (effective for assurance reports dated on or after Dec. 15, 2015), issued by the International Auditing and Assurance Standards Board. We conducted this verification independently and to our knowledge there has been no conflict of interest. The verification team has extensive experience in conducting assurance over environmental, social, ethical and health and safety information, systems and processes, has over 20 years combined experience in this field and an excellent understanding of Apex’s standard methodology for the verification of greenhouse gas emissions data.

Energy: o Diesel Fuel Consumption: 4,754,671 kWh o Natural Gas Fuel Consumption: 184,415,668 kWh o Renewable Energy Consumed - Self Generated (solar): 260,378 kWh o Renewable Energy Consumed - Self Generated (Wind): 2,554,186 kWh o Grid Electricity Consumed: 436,400,546 kWh Page 2 WATER RESOURCES • ENVIRONMENTAL SERVICES • INDUSTRIAL HYGIENE • SAFETY • SUSTAINABILITY Apex Companies, LLC • (800) 733‐2739 • www.apexcos.com o Renewable Energy Credits (REC) Purchased: 100,691,000 kWh o Renewable Electricity Consumed – Offsite: 128,982,866 kWh Period covered by GHG emissions verification:  January 1, 2022 to December 31, 2022 GHG Reporting Protocols against which verification was conducted:  World Resources Institute (WRI)/World Business Council for Sustainable Development (WBCSD) Greenhouse Gas Protocol, Corporate Accounting and Reporting Standard, Revised Edition (Scope 1 and 2) and the GHG Protocol Scope 2 Guidance, an amendment to the GHG Protocol Corporate Standard  WRI/WBCSD Corporate Value Chain (Scope 3) Accounting and Reporting Standard Verification Protocols used to conduct the verification:  ISO 14064-3 Second Edition 2019-04: Greenhouse gases - Part 3: Specification with guidance for the verification and validation of greenhouse gas statements  Apex’s standard procedures and guidelines for external Assurance of Sustainability Reports and International Standard on Assurance Engagements (ISAE) 3000 Revised, Assurance Engagements Other than Audits or Reviews of Historical Financial Information (effective for assurance reports dated on or after Dec. 15, 2015), issued by the International Auditing and Assurance Standards Board. We conducted this verification independently and to our knowledge there has been no conflict of interest. The verification team has extensive experience in conducting assurance over environmental, social, ethical and health and safety information, systems and processes, has over 20 years combined experience in this field and an excellent understanding of Apex’s standard methodology for the verification of greenhouse gas emissions data.

Avient makes no representations, guarantees, or warranties of any kind with respect to the information contained in this document about its accuracy, suitability for particular applications, or the results obtained or obtainable using the information. Avient makes no warranties or guarantees respecting suitability of either Avient’s products or the information for your process or end-use application. You have the responsibility to conduct full-scale end-product performance testing to determine suitability in your application, and you assume all risk and liability arising from your use of the information and/or use or handling of any product.

Certificate Avient Corporation Certificate Of Conformance This is to certify that the Responsible Care Management System of: Avient Corporation Avon Lake Corporate 33587 Walker Road Avon Lake OH 44012 United States (WITH ADDITIONAL FACILITIES LISTED ON ATTACHED ANNEX) has been assessed by ABS Quality Evaluations, Inc. and found to be in conformance with the requirements set forth by: RC14001®:2023 The Responsible Care Management System is applicable to: CORPORATE SUPPORT ACTIVITIES, DESIGN, MANUFACTURE AND DISTRIBUTION OF COLOUR AND ADDITIVE CONCENTRATES, THERMOPLASTIC RESINS AND PELLETS, SPECIALTY COMPOUNDS AND COLORANTS. Industrial Valle del Cinca S/N Apartado , E-22300 Barbastro, Spain Avient Corporation Design and Manufacture of Colorants and Compounds for Fluoropolymer and High Temperature Polymers. 19 Francis J Clark Circle Bethel CT 06801 United States Avient Corporation Design and Manufacture of Colorants and Additives for Plastics 03 Street 02, VSIP 820000 Thuận An Binh Duong Vietnam Avient Corporation Design and Manufacture of Colorants and Additives for Plastics Lot 1232, MK. 15, Kawasan Industri, Kecil & Sederhana Butterworth Penang 14120 Malaysia Avient Corporation Design and Manufacture of Colorants and Additives for Plastics Autopista Medellín Km 2.5, Via Parcelas Km 1, Vereda Siberia , 250017 Cota, Colombia Avient Corporation Design and Manufacture of Colour and Additive Concentrates, Thermoplastic Resins and Specialty Compounds Ihsan Dede Cad. , 41448 Gebze, Türkiye Avient Corporation Design and Manufacture of Colorants and Additives for Plastics 2#, Nanyunsan Rd, Huangpu District, Science City, Guangzhou Hi-Tech Industrial Development Zone , 510663 Guangzhou, Avient Corporation Design and Manufacture of Colorants and Additives for Plastics Avenida 34-11, Zona 12 Complejo Parque Gobal , 01012 Guatemala City, Guatemala Avient Corporation Design and Manufacture of Specialty Engineered Thermoplastics Orhangazi Mah. 1683 Sok. Design and Manufacture of Colorants and Additives for Plastics Plasticos #28 Santa Clara Coatitla, Ecatepec Morelos 55540 Mexico Avient Corporation Design and Manufacture of Colorants and Additives for Plastics Zhang Jiang Hi-tech Park No. 88, Guoshoujing Road Pudong , 201203 Shanghai, Avient Corporation - Shenzhen, China Design and Manufacture of Colorants and Additives for Plastics No. 1, Qihang Industry Park, Haoxiang Road , 518104 Shenzhen, Avient Corporation Design and Manufacture of Colorants and Additives Concentrates and Specialty Compounds for Thermo Plastic Resin.

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 11 ENERGY 11 • 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. Avient Specialty Formulators Other Specialty / Chemical Companies 2023E(%) 32 79 87 83 81 76 73 90 79 77 76 73 69 60 22 A vi en t K W R P P G F U L A V Y R P M F M C C E H X L A S H E C L H U N E M N S C L MULTIPLE EXPANSION Avient Specialty Formulators Other Specialty / Chemical Companies Source: Peer data per Bloomberg as of April 28, 2023 Note: Avient reflects 2023 adjusted EBITDA guidance of $530M and closing share price of $38.51. Further, as a result of Avient's portfolio shift to a pure play specialty formulator, it has completed several acquisitions and divestitures which have resulted in a significant amount of intangible asset amortization.

Avient makes no representations, guarantees, or warranties of any kind with respect to the information contained in this document about its accuracy, suitability for particular applications, or the results obtained or obtainable using the information. Avient makes no warranties or guarantees respecting suitability of either Avient’s products or the information for your process or end-use application. You have the responsibility to conduct full-scale end-product performance testing to determine suitability in your application, and you assume all risk and liability arising from your use of the information and/or use or handling of any product.

Avient also achieved our electricity goal in 2024, reaching 61% electricity being from renewable sources by leveraging green electricity purchase agreements among other sourcing initiatives.

We have worked very hard to develop a solutions portfolio that meets both marketplace requirements and applicable regulatory requirements to help customers succeed in today’s rigorous regulatory climate,” said Scott Craig, general manager for PolyOne Wilflex Inks. Wilflex screen-printing inks are formulated to meet compliance standards, and are supported by an effective system of controls to ensure consistency lot after lot.

These new toners are formulated without heavy metal or restricted ingredients, and can be used at lower doses in comparison to alternatives like pigment and solid masterbatches. It can and often does replace more traditional construction materials, such as glass and acrylic, in applications where transparency and clarity are important.