Avient Corporation Chairman, President and Chief Executive Officer, Expanded to address the

This approach is a key element in helping companies address their entire carbon footprint and reach sustainability goals.”    Media contact Nicole DeChant Avient Corporation nicole.dechant@avient.com Company Officers

Event Type: Corporate Conference Call Q2 Avient Corporation Earnings Conference Call More Q1 Avient Corporation Earnings Conference Call More

CLEVELAND – PolyOne Corporation, a premier global provider of specialized polymer materials, services and solutions, today announced the availa ANAHEIM, Calif. – To help medical device manufacturers develop ways to address healthcare-associated infections (HAIs), PolyOne is launching two new Company Officers

Avient’s EH&S Management System (EH&S MS) is managed by its Corporate Environmental, Health, Safety and Product Stewardship Department, and by degreed technical experts employed in all regions and businesses. We established a comprehensive EH&S MS to systemically identify and address any risks, which is externally certified and based on the ACC Responsible Care 14001® Standard. It addresses every aspect of our operations, including material transportation, site and warehouse activities, product distribution, customer usage, and our ongoing commitment to be a positive influence in the communities where we operate.

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.

To address these unmet needs, PolyOne developed Geon Bold vinyl solutions that deliver the preferred variety of color choices and the enduring performance that consumers demand.” Patterson, president and chief executive officer, PolyOne Corporation. Company Officers

Corporate seat Amsterdam First entry in Business Register 12-04-2006 Date of deed of incorporation 11-04-2006 Date of deed of last amendment to the Articles of Association 12-04-2021 Issued capital EUR 19.593,63 Paid-up capital EUR 19.593,63 Filing of the annual accounts The annual accounts for the financial year 2019 were filed on 01-07-2020. Visiting address Stationsplein 8 K, 6221BT Maastricht Telephone number +31437999376 Fax number +31437999333 Internet address www.clariant.com Date of incorporation 11-04-2006 Activities SBI-code: 46751 - Wholesale of basic and industrial chemicals For further information on activities, see Dutch extract. The Chamber of Commerce recommends that this document be viewed in digital form so that its integrity is safeguarded and the signature remains verifiable. 20 21 -0 4- 12 1 4: 06 :2 8 under number CHE-112.279.714 Sole shareholder since 20-10-2015 (registration date: 03-11-2015) Board members Name Borst, Rainer Erich Date of birth 10-10-1961 Date of entry into office 01-07-2020 (registration date: 06-07-2020) Title Director Powers Solely/independently authorised Name Kamalak, Ihsan Date of birth 21-08-1985 Date of entry into office 01-07-2020 (registration date: 06-07-2020) Title Director Powers Solely/independently authorised Name Merklein, Norbert Date of birth 03-05-1964 Date of entry into office 05-03-2021 (registration date: 30-03-2021) Powers Solely/independently authorised Extract was made on 12-04-2021 at 14.06 hours.

What is the first step I should take in addressing this issue? Company Officers Avient Corporation Privacy Statement

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”). The office of Chairman of the Board may or may not be an officer position. March 6, 2024 Avient Corporation Corporate Governance Guidelines 1.