Annual Repor t | 2024 2 STOCK EXCHANGE LISTING Avient's Common Stock is listed on the New York Stock Exchange, Symbol: AVNT SHAREHOLDER INQUIRIES If you have any questions concerning your account as a shareholder, name or address changes, inquiries regarding stock certificates, or if you need tax information regarding your account, please contact our transfer agent: Equiniti Trust Company, LLC 1110 Centre Pointe Curve, Suite 101 Mendota Heights, MN 55120-4100 Phone: 1-855-598-2615 or 1-651-450-4064 www.shareowneronline.com Additional information about Avient, including current and historic copies of Annual Reports on Form 10-K and other reports filed with the Securities and Exchange Commission, is available online at www.avient.com or free of charge from: Investor Relations Avient Corporation 33587 Walker Road Avon Lake, Ohio 44012 Phone: 1-440-930-1000 ANNUAL MEETING The annual meeting of Avient will be held virtually via live webcast at 9:00 a.m. FINANCIAL INFORMATION Security analysts and representatives of financial institutions are invited to contact: Joe Di Salvo Vice President, Treasurer and Investor Relations Phone: 1-440-930-1921 Email: giuseppe.disalvo@avient.com AUDITORS Ernst & Young LLP Nor th Point Tower II, Suite 1800 1001 Lakeside Ave Cleveland, OH 44114 INTERNET ACCESS Information on Avient’s products and services, news releases, corporate governance, EDGAR filings, Repor ts on Forms 10-K and 10-Q, etc. as well as an electronic version of this annual repor t, are available on the Internet at www.avient.com.

Volg de plaatselijke meldingsprocedures of neem contact op met de overheid in geval van nood. Als u niet zeker bent of u te maken heeft met een “overheidsfunctionaris”, neem dan contact op met de Juridische afdeling voor richtlijnen. Als u nog steeds bezorgd bent, neem dan contact op met het plaatselijke management of een van de hulpbronnen die in de Code vermeld staan.

Voor meldingen aangaande bedenkelijke boekhouding, interne boekhoudkundige controles of auditzaken, kunt u kunt u ook contact opnemen met onze afdeling Internal Audit of uw bezorgdheden uiten aan de Auditcommissie van onze Raad van Bestuur door contact op te nemen met het hoofd Juridische zaken. Volg de plaatselijke meldingsprocedures of neem contact op met de overheid in geval van nood. Als u vragen heeft, neem dan contact op met uw manager van personeelszaken.

For shrinkage values for specific grades, please refer to the product technical data sheet, available at www.avient.com or by contacting your Avient representative. For additional information about the standard Versaflex OM series and the development of new TPEs that bond to unusual substrates, please contact your Avient representative. High gloss clear grades have higher COFs and more intimate mold contact and therefore are more difficult to eject.

Contacts avec les concurrents. Pour cette raison, évitez les contacts inutiles avec les concurrents. Évitez les contacts inutiles avec les concurrents. 2.

AVIENT SOLUTIONS PROVIDE DISINFECTANT DURABILITY PROGRAM BULLETIN Contact Avient today to learn how our innovative healthcare solutions can prevent chemical related stress cracking, premature field failures, and component discoloration while mitigating the potential risk of complaints or claims.

TECHNICAL EXPERTISE HELPS ELECTRONIC CONNECTOR COMPANY ENTER NEW MARKET © 2021, All Rights Reserved Avient Corporation, 33587 Walker Road, Avon Lake, Ohio USA 44012 To learn more about Bergamid™ Nylon Formulations, contact Avient at +1.844.4AVIENT (1.844.428.4368) or visit us at avient.com.

A COMPLEX SEAT FASTENER AT A LOWER COST, LOWER WEIGHT AND WITH GREATER DESIGN FLEXIBILITY © 2021, All Rights Reserved Avient Corporation, 33587 Walker Road, Avon Lake, Ohio USA 44012 To learn more about Bergamid™ Nylon Formulations , contact Avient at +1.844.4AVIENT (1.844.428.4368) or visit us at avient.com.

Contact your sales representative for more information, or to learn more about custom solutions for your application.

COMPANY CONTACT INFORMATION corporateregulatory@avient.com ENVIRONMENTAL EFFECTS Based on its physical/ chemical properties (insolubility, no vapor pressure), Carbon Black released into the environment will be distributed mainly in soil or sediments.