in aggregate principal amount of senior notes due 2025 (the "notes") in an offering exempt from the registration requirements of the Securities Act of 1933 (the "Securities Act"). View original content:http://www.prnewswire.com/news-releases/polyone-announces-pricing-of-650-million-5-75-senior-notes-due-2025--301049717.html

In 2025, we will continue this collaboration by having our supplier’s complete compliance and ESG assessments to ensure adherence to standard modern slavery and human trafficking laws. In order to improve our internal processes and bring ColorMatrix in line to the global Avient system a more effective working process for identifying risk and measuring progress through KPI’s is targeted to be implemented through 2025, which will allow us to improve the mitigation and monitoring of risk across our suppliers. On behalf of the Board of Directors for ColorMatrix Europe Limited: Amanda Saal (Director) Signature: Date: 26th June 2025

PowerPoint Presentation Avient Corporation AVNT FEBRUARY 13, 2025 Fourth quarter and full year 2024 results 2025 financial guidance Copyright © . All Rights Reserved 2025 17 ADJ. EPS - Full year 2025 $2.70 to $2.94 Q1 2025 $0.76 adj.

Governance and Corporate Responsibility Charter Proposed Revisions March 2025 Final and Approved.pdf AVIENT CORPORATION GOVERNANCE AND CORPORATE RESPONSIBILITY COMMITTEE CHARTER Membership The Governance and Corporate Responsibility Committee (the “Committee”) of the Board of Directors (the “Board”) of Avient Corporation (the “Company”) will consist entirely of directors who meet the definition of “independent” as set forth in the Corporate Governance Standards of the New York Stock Exchange. March 14, 2025

For more information on changes to the EH&S Committee in 2025, refer to page 43. Avient’s Board of Directors provides the highest level of governance, as detailed to the right and in the 2025 Proxy Statement. Sustainability Report | 2024 43Contents | About Avient | Message from the CEO | Sustainability at Avient | Enabling a Sustainable World | Preserving the Planet | Culture of Safety & Sustainability | Governance | Appendix https://www.avient.com/sites/default/files/2025-03/2025%20Proxy%20Statement.pdf https://www.avient.com/sites/default/files/2025-03/2025%20Proxy%20Statement.pdf https://www.avient.com/investors/governance/board-directors https://www.avient.com/sites/default/files/2024-05/3b%20-%20Corporate%20Governance%20Guidelines.Draft%20Feb.%202024.v1.2.Revised.4-16-24.Final_.pdf https://www.avient.com/sites/default/files/2025-03/380605_AVIENT_2024AR_full_250325.pdf https://www.avient.com/sites/default/files/2025-03/380605_AVIENT_2024AR_full_250325.pdf At Avient, we maintain a strong commitment to sustainability, by conducting business in a way that puts the safety of our employees and needs of our customers first, while enabling a sustainable world.

Dominic Townsend, President Effective Date: 22 March 2024 Expiration Date: 28 February 2025 Revision Date: 22 March 2024 Avient Corporation - Barbastro Pol. Dominic Townsend, President Effective Date: 22 March 2024 Expiration Date: 28 February 2025 Revision Date: 22 March 2024 Avient Corporation - Suzano, Brasil Av. Dominic Townsend, President Effective Date: 22 March 2024 Expiration Date: 28 February 2025 Revision Date: 22 March 2024 Avient Corporation - Toluca, Mexico AV.

MSC Certificate Place and date: For the issuing office: Høvik, 23 January 2025 DNV Product Assurance AS Veritasveien 1, 1363 Høvik, Norway Cecilie Gudesen Torp Management Representative Lack of fulfilment of conditions as set out in the Certification Agreement may render this Certificate invalid. ICP-4-5-i5-ISO13485-f1 rev2 ACCREDITED UNIT: DNV Product Assurance AS, Veritasveien 1, 1363 Høvik, Norway - TEL: +47 67 57 99 00. www.dnv.com MANAGEMENT SYSTEM CERTIFICATE Certificate no.: 240625-2017-AQ-RGC-NA-PS Initial certification date: 14 September 2017 Valid: 08 February 2025 – 07 February 2028 This is to certify that the management system of PolyOne-Shanghai, China 88 Guoshoujing Road, Z.J.Hi-Tech Park, Pudong Shanghai, China (Unicode: 91310000607342402D) has been found to conform to the Quality Management System standard: ISO 13485:2016 This certificate is valid for the following scope: Design, Manufacture, Sales and Distribution of Medical Colour and Additive Concentrates Used for the Plastic Parts of Medical Devices http://www.dnv.com

Certificate No: QMS10207 Certification Date: 13 FEB 1991 Effective Date: 02 MAY 2025 Expiration Date 04 MAY 2028 Revision Date: 02 MAY 2025 Dominic Townsend, President Copyright as of the Effective Date, ABS Quality Evaluations, Inc.

February 21, 2025 Aug 01, 2025 Jul 10, 2025

For example, the EU’s directive for the use of recycled PET (rPET) in bottles1 has increased to 25% in 2025. PRODUCT BULLETIN Copyright © 2025, Avient Corporation.