Avient Corporation Chairman, President and Chief Executive Officer, For the same reasons, the Company is unable to address the probable significance of the unavailable information.

Code of Ethics _Sr Financial Officers Revised December 2023 Code of Ethics Applicable to Senior Financial Officers Application and Standards of this Code of Ethics This Code of Ethics applies to Avient’s Chief Executive Officer, Chief Financial Officer, and Corporate Controller. In addition to their responsibilities under this Code of Ethics, these officers must comply with Avient’s Code of Conduct. Each officer must: • avoid potential, real, or perceived conflict of interest situations between personal and professional relationships.

Q1 Avient Corporation Earnings Conference Call More Q4 Avient Corporation Earnings Conference Call More Q3 Avient Corporation Earnings Conference Call More

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. Corporate Governance. The Committee may appoint subcommittees from time to time as needed and may delegate authority to such subcommittees or to officers of the Company, when appropriate, consistent with applicable laws, regulations, and listing standards.

We’re helping our customers address current trends with a low odor product that can withstand the rigors of underhood specifications. Michelle Maniscalco Senior Manager, Marketing Communications PolyOne Corporation +1 440-930-1988 michelle.maniscalco@avient.com Company Officers

PolyOne Corporation (NYSE: POL), with 2018 revenues of $2.9 billion, is a premier provider of specialized polymer materials, services and solutions. Michelle Maniscalco Senior Manager, Marketing Communications PolyOne Corporation +1 440-930-1988 michelle.maniscalco@avient.com Company Officers

Topics will address solutions for challenges associated with regulations, design, and processing. Michelle Maniscalco Senior Manager, Marketing Communications PolyOne Corporation +1 440-930-1988 michelle.maniscalco@avient.com Company Officers

New reSound OM grades address both goals by leveraging a significant amount of renewable content without compromising the material’s properties.” Michelle Maniscalco Senior Manager, Marketing Communications PolyOne Corporation +1 440-930-1988 michelle.maniscalco@avient.com Company Officers

Solutions on display are designed to address compliance with regulations and the need for innovation among wire and cable customers. Manager, Marketing Communications Asia PolyOne Corporation +86 21 60284888 jennifer.huang@avient.com  Company Officers

Additionally, the new grades are formaldehyde-free, addressing VOC concerns in manufacturing compared to POM. Media contact Michelle Maniscalco Senior Manager, Marketing Communications Avient Corporation michelle.maniscalco@avient.com Company Officers