X0508 4 2025-03-28 0001122976 AVIENT CORP AVNT 0001756776 Pederson Christopher AVIENT CORPORATION 33587 WALKER ROAD AVON LAKE OH 44012 1 SVP, President SEM 0 Common Stock 2025-03-28 4 I 0 827.327 36.91 A 5757.795 I Supplemental Plan Common Stock 15222 D Common Stock 7718.147 I Savings Plan Trust Reflects the investment by the reporting person in Avient stock under the Supplemental Plan, plus exempt acquisitions since the date of the reporting person's last report. The reported transaction is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c), and was conducted pursuant to a pre-arranged trading plan dated September 23, 2022. The information in this report is based on a plan statement as of March 28, 2025. /s/ Robert K. James, Power of Attorney For: Christopher Pederson 2025-04-01