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2023 Sustainability Report published online, detailing progress toward 2030 Sustainability Goals and ESG performance ratings news library online, please visit www.avient.com/news-events. SEC Filings

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Yes ☐ No ☑ Indicate by check mark whether the registrant (1) has filed all reports required to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during the preceding 12 months (or for such shorter period that the registrant was required to file such reports), and (2) has been subject to such filing requirements for the past 90 days. The Company records tax provisions for uncertain tax positions in accordance with FASB ASC Topic 740, Income Taxes. Shareholders will be able to attend and participate in the annual meeting online, vote shares electronically, and submit questions during the annual meeting by visiting www.virtualshareholdermeeting.com/AVNT2024.

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