news library online, please visit www.avient.com/news. Income tax expense SEC Filings

To access PolyOne's news library online, please visit www.polyone.com/news. Income tax expense Tax adjustments include the net tax expense (benefit) from one-time income tax items and deferred income tax valuations allowance adjustments.

news library online, please visit www.avient.com/news. Tax adjustments(2) SEC Filings

news library online, please visit www.avient.com/news. Tax adjustments(2) SEC Filings

Tax Documentation Tax Documentation Tax Documentation

news library online, please visit www.avient.com/news. Income tax expense SEC Filings

To access PolyOne’s news library online, please visit www.polyone.com/news. Tax adjustments(2) 2) Tax adjustments include the net tax expense/benefit from one-time income tax items and deferred income tax valuations allowance adjustments.

To access PolyOne’s news library online, please visit www.polyone.com/news a) Tax adjustments include the net tax expense (benefit) from one-time income tax items and deferred income tax valuation allowance adjustments. Tax adjustments

To access PolyOne's news library online, please visit www.polyone.com/news. 2) Tax adjustments include the net tax expense (benefit) from one-time income tax items and deferred income tax valuation allowance adjustments. Effective Tax Rate

Annual Report | 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. 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/AVNT2025. Johnson Vice President, Tax Holger Kronimus Vice President, Europe, General Manager, Engineered Materials, Europe M.