General Policy: The Board of Directors of Avient Corporation (the “Company”) has determined, consistent with the Company’s Code of Conduct, that it is the Company’s policy to comply with all applicable federal and state securities laws, including those relating to buying or selling securities of the Company. These guidelines include the requirement that plans only be entered into during a time other than during a blackout period and that they include a waiting period thereafter before the first trade pursuant to the trading plan, the length of which varies depending on whether or not you are a director or officer of the Company. 13. Revised: December 20, 2024 ANNEX A COVERED EMPLOYEES All Directors All Elected Officers All Appointed Officers Assistant Controller Executive Assistants to Covered Employees Corporate Communications/Investor Relations (all levels) Internal Audit VP, Directors, Managers and Staff of Audit (all levels), Tax Managers and Tax Analysts, Staff of Tax (all levels) Directors, Managers and Staff, Mergers and Acquisitions and functional professionals supporting Mergers and Acquisitions (including Legal professionals) All Other Employees (including Finance and IT employees) with access to full quarterly results within the Avient Systems Secretaries and Direct-Reporting Assistants to any Covered Employee Financial and Business Consultants who have undertaken to comply with this policy Revised: December 20, 2024 ANNEX B Please access the PeopleLink home page and search for “pre-clearance” after clicking “My Help” General Counsel: Amy M.

Johnson previously served as Director of Strategic Tax Planning, Leader of the Intellectual Property Program, and Director of Transfer Pricing at Illinois Tool Works Inc., a Fortune 200 global diversified, industrial manufacturer.

M&A technology integration lead, program director of lean innovation, and global technology director for Specialty Engineered Materials. Swanson, Director, Investor Relations, PolyOne Corporation, +1 440-930-1018, eric.swanson@avient.com; Media Contact: Kyle G.

Actions included the re-election of the following ten individuals to serve on the company's Board of Directors until the 2017 annual meeting: who serves as lead director on Swanson, Director, Investor Relations, PolyOne Corporation, +1 440-930-1018, eric.swanson@avient.com; Media Contact: Kyle G.

Avient’s Board of Directors has a long-standing Environment, Health and Safety (EH&S) Committee. Any material risks identified by the Management System, as well as plans to address them, are reported to the Board of Directors EH&S Committee on an annual basis.

Designers Brian Everett, Jane Spikowski, and John Church of PolyOne’s IQ Design team donated design time and expertise to help White, executive director of GV2020, develop his invention, a diagnostic device called the U-See™. I first started working on this problem more than 14 years ago when on international missions in the Marine Corps,” said Kevin White, executive director, Global Vision 2020 and inventor of the USee device.

1 AVIENT CORPORATION AUDIT COMMITTEE CHARTER Authority The Board of Directors, by resolution dated August 31, 2000, established the Audit Committee. The Audit Committee may request that any director, officer or employee of the Company, or the Company’s outside counsel or independent auditor, attend a meeting of the Committee or to meet with any members of, or consultants to, the Committee. These are the responsibilities of management and the independent auditor. 3 The Audit Committee must make regular reports to the Board of Directors.

F -27, MIDC, Ranjangaon, Taluka – Shirur, Pune Maharashtra 412220 India Hold this Opinion Statement No. 798019/2023 The Organization has demonstrated that they have followed the guidelines provided for Good Manufacturing Practices as per the ICHQ7 guidelines in their organization for the following Business activity: Research and Development, Manufacture of Color additives, Concentrates and Specialty Formulations for intended use in pharma and other industries Theuns Kotze, Managing Director – IMETA Assurance Last Audit Date: 31.10.2023 BSI Group India Private Limited T: +91-4762-9000 (CIN U74899DL1999PTC101381 info.in@bsigroup.com The Mira Corporate Suites bsigroup.com/en-IN Plot 1&2, Ishwar Nagar, Mathura Road New Delhi-110065, India

PRNewswire/ -- The Board of Directors of Avient Corporation (NYSE: AVNT), an innovator of materials solutions, has declared a quarterly cash dividend of

Swanson, Director, Investor Relations, PolyOne Corporation, +1 440-930-1018, eric.swanson@avient.com; Media Contact: Kyle G.