Environmental, Health and Safety and Other Regulation We are subject to various environmental laws and regulations that apply to the production, use and sale of chemicals, emissions into the air, discharges into waterways and other releases of materials into the environment, and the generation, handling, storage, transportation, treatment and disposal of waste material. The nature of our business exposes us to compliance costs and risks of liability under these laws and regulations due to the production, storage, transportation, recycling or disposal and/or sale of materials that can cause contamination and other harm to the environment or personal injury if they are improperly handled and released. FINANCIAL INFORMATION Security analysts and representatives of financial institutions are invited to contact: Joe Di Salvo Vice President, Treasurer and Investor Relations Phone: 440-930-1921 Email: giuseppe.disalvo@avient.com AUDITORS Ernst & Young LLP 950 Main Ave., Suite 1800 Cleveland, OH 44113 INTERNET ACCESS Information on Avient’s products and services, news releases, corporate governance, EDGAR filings, Reports on Forms 10-K and 10-Q, etc. as well as an electronic version of this annual report, are available on the Internet at www.avient.com.

Such grants generally are made at times when Avient is not in possession of material non-public information, and not during a “blackout period,” which is the period of time that is in close proximity to the release of financial or material non-public information. In addition, in order to receive payments under the Executive Severance Plan, the Named Executive Officer must execute a release of claims against us and is subject to confidentiality, non-compete, non-solicitation and non- disparagement covenants during the two-year severance period. Our proxy materials for the Annual Meeting will be released to shareholders beginning March 27, 2024.

Some examples are: • Earnings or estimates or other financial information before public release • Significant changes in levels of operations • Discussions about major transactions including acquisitions, joint ventures or dispositions • Information about our financial condition, prospects or plans, marketing and sales programs, and R&D information • Changes in senior management that have not yet been publicly announced • Awards or cancellations of major contracts with customers or suppliers • Pending products or new products, services or processes • The existence of and developments relating to significant regulatory proceedings, government investigations and litigation involving the Company TABLE OF CONTENTS INTRODUCTION OUR CODE OF CONDUCT RESPECT FOR ALL HONESTY AT WORK INTEGRITY IN OUR BUSINESS CORPORATE SOCIAL RESPONSIBILITY RESOURCES CODE OF CONDUCT | 18 Political Contributions / Activities and Charitable Contributions Avient encourages you to stay informed about important issues, to vote and to be involved in the political process.

Unless otherwise stated, Adjusted Operating Income, Adjusted EBITDA and Adjusted EPS figures included in this presentation exclude the impact of special items as defined in our quarterly earnings releases.

Environmental, Health and Safety We are subject to various environmental laws and regulations that apply to the production, use and sale of chemicals, emissions into the air, discharges into waterways and other releases of materials into the environment and the generation, handling, storage, transportation, treatment and disposal of waste material. The nature of our business exposes us to compliance costs and risks of liability under these laws and regulations due to the production, storage, transportation, recycling or disposal and/or sale of materials that can cause contamination and other harm to the environment or personal injury if they are improperly handled and released. Swanson Director, Investor Relations Phone: 440-930-1018 Email: eric.swanson@polyone.com AUDITORS Ernst & Young LLP 950 Main Ave., Suite 1800 Cleveland, OH 44113 INTERNET ACCESS Information on PolyOne’s products and services, news releases, corporate governance, EDGAR filings, Reports on Forms 10-K and 10-Q, etc. as well as an electronic version of this annual report, are available on the Internet at www.polyone.com.

Environmental, Health and Safety and Other Regulation We are subject to various environmental laws and regulations that apply to the production, use and sale of chemicals, emissions into the air, discharges into waterways and other releases of materials into the environment, and the generation, handling, storage, transportation, treatment and disposal of waste material. The nature of our business exposes us to compliance costs and risks of liability under these laws and regulations due to the production, storage, transportation, recycling or disposal and/or sale of materials that can cause contamination and other harm to the environment or personal injury if they are improperly handled and released. FINANCIAL INFORMATION Security analysts and representatives of financial institutions are invited to contact: Joe Di Salvo Vice President, Treasurer and Investor Relations Phone: 440-930-1921 Email: giuseppe.disalvo@avient.com AUDITORS Ernst & Young LLP 950 Main Ave., Suite 1800 Cleveland, OH 44113 INTERNET ACCESS Information on Avient’s products and services, news releases, corporate governance, EDGAR filings, Reports on Forms 10-K and 10-Q, etc. as well as an electronic version of this annual report, are available on the Internet at www.avient.com.

Such grants generally are made at times when Avient is not in possession of material non-public information, and not during a “blackout period,” which is the period of time that is in close proximity to the release of financial or material non-public information. In addition, in order to receive payments under the Executive Severance Plan, the Named Executive Officer must execute a release of claims against us and is subject to confidentiality, non-compete, non-solicitation and non- disparagement covenants during the two-year severance period. Our proxy materials for the Annual Meeting will be released to shareholders beginning March 29, 2023.

The standard is used to identify several potential aspects and associated impacts that Avient has on nature, such as climate change, the release of hazardous chemicals affecting air quality, and water usage contributing to resource depletion.