Avient urges all shareholders to vote their proxies so that they can participate in the decisions at the annual meeting. Avient Stock Performance The following is a graph that compares the cumulative total shareholder returns for Avient’s common shares, the S&P 500 index and the S&P Mid Cap Chemicals index, with dividends assumed to be reinvested when received. President and Chief Executive Officer, Avient Corporation Committee: 3 Sandra B.

Number: BC1228188 CERTIFICATE OF CHANGE OF NAME BUSINESS CORPORATIONS ACT I Hereby Certify that POLYONE CANADA ULC changed its name to AVIENT CANADA ULC on January 15, 2021 at 12:13 PM Pacific Time.

Patterson, Chairman, President and Chief Executive Officer, Avient Corporation. http://www.avient.com/investors 2 About Avient Avient Corporation (NYSE: AVNT), with expected 2021 revenues of $4.75 billion, provides specialized and sustainable material solutions that transform customer challenges into opportunities, bringing new products to life for a better world. To access Avient’s news library online, please visit www.avient.com/news.

Patterson, Chairman, President and Chief Executive Officer, Avient Corporation. Beggs, Senior Vice President and Chief Financial Officer, Avient Corporation. Senior management believes these measures are useful to investors because they allow for comparison to Avient's performance in prior periods without the effect of items that, by their nature, tend to obscure Avient's operating results due to the potential variability across periods based on timing, frequency and magnitude.

NEWS RELEASE FOR IMMEDIATE RELEASE Avient Announces Registration Details for 2023 Sustainability Day CLEVELAND – August 28, 2023 – Avient Corporation (NYSE: AVNT), a leading provider of specialized and sustainable material solutions, has announced registration details for a virtual Sustainability Day for investment professionals on Wednesday, September 20, 2023, from 9 a.m. – 11 a.m. Avient serves a unique role in enabling the sustainability goals of our customers through the application of material science in nearly every end market,” said Jamie A. Beggs, Senior Vice President and Chief Financial Officer, Avient Corporation.

यह एंटीट्रस्ट नीति Avient की आचार संहिता के प्रतिस्पर्धा अनुभाग का संपूरक है। यह याद रखा जाना चाहिए कि Avient के ग्राहक और आपूर्तिकर्ता भी Avient के प्रतियोगी हो सकते हैं। यदि आपके कोई प्रश्न हैं तो Avient के कानूनी विभाग से परामर्श लें।

Ripple joined Avient in 1998. Before joining Avient, he held various commercial roles in the specialty elastomers and specialty polybutylene businesses at Shell Chemical Company. Avient Corporation • 33587 Walker Road • Avon Lake, Ohio 44012 • 440.930.1000 • www.avient.com

GEORGE INGLIS Vice President, Corporate Controller George Inglis is Vice President, Corporate Controller at Avient Corporation, an innovator of materials solutions that help customers succeed while enabling a sustainable world. Inglis has taken on numerous special assignments in his tenure, including supporting Avient’s speciality transformation through M&A activity as well as establishing Avient’s Global Business Services (GBS). Avient Corporation • 33587 Walker Road • Avon Lake, Ohio 44012 • 440.930.1000 • www.avient.com

Microsoft Word - Conflict Minerals Policy.docx Avient  Corporation  Policy  Statement  on  Conflict  Minerals   Background   In  August  2012,  the  U.S.   Position   Avient  Corporation  supports  efforts  to  end  human  rights  abuses  wherever  they  may  occur,  and  acts  in  accordance   with  our  vision  of  respecting  global  communities.     Avient  is  equally  committed  to  complying  with  the  reporting  obligations  under  Section  1502  of  the  Act  and  the   related  rule  issued  by  the  SEC.    

QUALITY POLICY At Avient, we collaborate with customers to provide specialized and sustainable solutions, accepting material science challenges that can enable a circular economy and meet the needs of the present without compromising future generations to do the same Avient is committed to use the Quality Management System (QMS) to satisfy all applicable customer and regulatory requirements. All associates have a responsibility to ensure Avient achieves its intended results.