Incident reporting and contact tracing procedures, including self-quarantine if suspected exposure Companies acquired by Avient go through a rigorous EH&S integration process to bring new sites in line with our high standards and policies. These rates are compiled globally and reported on a monthly basis to all leadership personnel in the company.

Polyone Corporation at Roulston & Company Midwest Conference Avient Company Officers Investor Contacts

PolyOne Corporation at Gabelli & Company Specialty Chemical Conference Avient Company Officers Investor Contacts

PolyOne IR Presentation - Gabelli & Company Specialty Chemical Conference - 3/22/2017 Avient Company Officers Investor Contacts

CERTIFICATE OF INCORPORATION ON CHANGE OF NAME Company Number 3141094 The Registrar of Companies for England and Wales hereby certifies that under the Companies Act 2006: POLYONE CORPORATION UK LIMITED a company incorporated as private limited by shares, havingits registered office situated in England and Wales, has changed its name to: AVIENT MATERIAL SOLUTIONS UK LIMITED Given at Companies House on9th November 2021. The above information was communicated by electronic meansand authenticated by the Registrar of Companies under section 1115 of the Companies Act 2006

Media Contact Nicole DeChant Avient Corporation nicole.dechant@avient.com Media Relations Contacts Company Officers

Media Contact Nicole DeChant Avient Corporation nicole.dechant@avient.com Media Relations Contacts Company Officers

Media Contact Jennifer Huang Senior Manager, Marketing Communications Asia Avient Corporation jennifer.huang@avient.com +86-21-60284888 Media Relations Contacts Company Officers

Media contact Nicole DeChant Avient Corporation nicole.dechant@avient.com Media Relations Contacts Company Officers

Media Contact Jennifer Huang +86 21 60284888 jennifer.huang@avient.com Media Relations Contacts Company Officers