X0508 4 2026-02-19 0001122976 AVIENT CORP AVNT 0002043384 Clark Philip G Jr AVIENT CORPORATION 33587 WALKER ROAD AVON LAKE OH 44012 1 SVP, Chief Technology Officer 0 Common Stock 2026-02-19 4 M 0 936 A 968 D Common Stock 2026-02-19 4 F 0 329 42.51 D 639 D Restricted Stock Units 2026-02-19 4 M 0 936 0 D Common Stock 936 1874 D Each restricted stock unit represents a contingent right to receive one share of Avient common stock. Includes dividend equivalents earned with respect to the vested restricted stock units. Represents shares of Avient common stock that were withheld solely to satisfy the tax withholding obligation applicable to the vesting of restricted stock units on February 19, 2026. The restricted stock units vest in substantially equal installments on each of February 19, 2026, February 19, 2027 and February 19, 2028, unless earlier vested or terminated pursuant to the terms of the grant agreement. /s/ Robert K. James, Power of Attorney for Philip G. Clark, Jr. 2026-02-23