PROXY SUMMARY Avient Corporation 33587 Walker Road Avon Lake, Ohio 44012 PROXY STATEMENT 2022 | Annual Meeting of Shareholders 1 PROXY STATEMENT We are providing the enclosed proxy materials to you in connection with the solicitation by the Board of Directors (the “Board”) of Avient Corporation ("Avient," "Avient Corporation," or the “Company”) of proxies to be voted at the Annual Meeting of Shareholders to be held on Thursday, May 12, 2022 (the “Annual Meeting”), and at any adjournments or postponements thereof. COMMUNICATION WITH BOARD Shareholders and other interested parties who wish to communicate directly with the Board as a group, the non-management or independent Directors as a group, or with any individual Director may do so by writing to the Secretary, Avient Corporation, 33587 Walker Road, Avon Lake, Ohio 44012. Requests for copies of such Annual Report on Form 10-K should be directed to: Avient Center, 33587 Walker Road, Avon Lake, Ohio 44012, Attention: Secretary.

© 2021, All Rights Reserved Avient Corporation, 33587 Walker Road, Avon Lake, Ohio USA 44012 To learn more about OnFlex™ S HF, contact Avient at +1.844.4AVIENT (1.844.428.4368) or visit us at avient.com. THE SOLUTION The Schneider-Electric NB (Strömfors) design staff turned to Avient for help in selecting the right material. Avient determined the TPE would perform satisfactorily at an 85 Shore A hardness level.

© 2018, All Rights Reserved PolyOne Corporation, 33587 Walker Road, Avon Lake, Ohio USA 44012 It’s time to better your business.

DENSITY-MODIFIED POLYMER REPLACES BRASS, ACHIEVING PERFORMANCE, ENVIRONMENTAL AND COST BENEFITS © 2021, All Rights Reserved Avient Corporation, 33587 Walker Road, Avon Lake, Ohio USA 44012 To learn more about Gravi-Tech™ density- modified formulations, contact Avient at +1.844.4AVIENT (1.844.428.4368) or visit us at avient.com. Avient’s experts customized a Gravi-Tech formulation that met our exact requirements.” Kane Whitaker, inventor of the PolyChek valve, said “Avient’s team supported us every step of the way—from material identification, through customization, testing and process optimization.

TERMS AND CONDITIONS These Terms and Conditions govern the sale of Products to another (“Buyer”) by Avient Corporation and its affiliates (“Seller”). 1. With respect to the state of Ohio, this waiver applies to Section 35 Article II of the Ohio Constitution and Ohio Revised Code Sec. 4123.74. 16. If Buyer resells the Products, Buyer agrees to the Terms and Conditions Regarding Buyer Resale of Avient Products located at www.avient.com/terms.

Avient Corporation Informativa sulla privacy dei candidati Apprezziamo il tuo interesse a lavorare per Avient. Per ulteriori informazioni su come Avient elabora le tue informazioni personali per questi servizi e siti web di terzi, visita l'Informativa sulla privacy di Avient Corporation, disponibile su https://www.avient.com/company/policies- and-governance/avient-corporation-privacy-statement). Contattaci Se hai domande o desideri esercitare uno dei tuoi diritti, puoi contattarci a: Il responsabile della privacy aziendale Avient Corporation 33587 Walker Road Avon Lake, Ohio 44012 E-mail: PRIVACY.OFFICER@AVIENT.COM Telefono: 1-800-901-2078 Puoi anche inviarci le tue domande o richieste sulla privacy tramite il nostro modulo online.

Avient Corporation Aviso de privacidad del Candidato Agradecemos su interés en trabajar para Avient. HH. y a otros sistemas de la empresa Avient. Contacte con nosotros Si tiene cualquier pregunta o desea ejercer alguno de sus derechos, puede contactar con nosotros en The Corporate Privacy Officer Avient Corporation 33587 Walker Road Avon Lake, Ohio 44012 Correo electrónico: PRIVACY.OFFICER@AVIENT.COM Teléfono: 1-800-901-2078 También puede enviarnos sus preguntas o solicitudes de privacidad a través de nuestro formulario en línea.

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Avon Lake, Ohio 2. Massillon, Ohio 5. Norwalk, Ohio 6.