X0306 4 2021-05-07 0001122976 AVIENT CORP AVNT 0001433828 Patterson Robert M AVIENT CENTER 33587 WALKER ROAD AVON LAKE OH 44012 1 1 Chairman, President & CEO Common Stock 2021-08-27 4 I 0 121277.52 52.49 D 0 I Supplemental Plan Common Stock 2021-05-07 5 G 0 E 5000 0 D 385242 D Common Stock 2021-08-27 4 M 0 66700 38.27 A 451942 D Common Stock 2021-08-27 4 D 0 56645 52.49 D 395297 D Common Stock 2021-08-27 4 M 0 105200 24.98 A 500497 D Common Stock 2021-08-27 4 D 0 74518 52.49 D 425979 D Common Stock 2021-08-27 4 M 0 118200 34.10 A 544179 D Common Stock 2021-08-27 4 D 0 95156 52.49 D 449023 D Common Stock 2021-08-27 4 M 0 63034 41.89 A 512057 D Common Stock 2021-08-27 4 D 0 55951 52.49 D 456106 D Common Stock 2021-08-27 4 M 0 102300 31.54 A 558406 D Common Stock 2021-08-27 4 D 0 79579 52.49 D 478827 D Common Stock 2021-08-27 4 M 0 57517 31.48 A 536344 D Common Stock 2021-08-27 4 D 0 44706 52.49 D 491638 D Stock Appreciation Rights 38.27 2021-08-27 4 M 0 66700 0 D 2025-02-04 Common Stock 66700 0 D Stock Appreciation Rights 24.98 2021-08-27 4 M 0 105200 0 D 2026-02-10 Common Stock 105200 0 D Stock Appreciation Rights 34.10 2021-08-27 4 M 0 118200 0 D 2027-02-15 Common Stock 118200 0 D Stock Appreciation Rights 41.89 2021-08-27 4 M 0 63034 0 D 2028-02-14 Common Stock 63034 31516 D Stock Appreciation Rights 31.54 2021-08-27 4 M 0 102300 0 D 2029-02-11 Common Stock 102300 51150 D Stock Appreciation Rights 31.48 2021-08-27 4 M 0 57517 0 D 2030-02-10 Common Stock 57517 115033 D Reflects an exempt intra-plan transfer (rule 16b-3(f)) by the reporting person of value out of the Avient stock fund and into one or more other investments under the Issuer's Supplemental Retiremet Benefit Plan pursuant to a pre-arranged trading plan. Includes shares acquired pursuant to dividend reinvestment. The listed SAR transactions were completed pursuant to a pre-arranged trading plan. SARs become exercisable and vest only upon the achievement of both price and time requirements. To vest, each one-third of the grant must attain 10%, 15% and 20% stock appreciation, respectively (which must be maintained for a minimum of thirty consecutive trading days) from the grant date closing price of $38.27 per share and no more than one-third of the grant can vest per year during the first three years. SARs become exercisable and vest only upon the achievement of both price and time requirements. To vest, each one-third of the grant must attain 10%, 15% and 20% stock appreciation, respectively (which must be maintained for a minimum of thirty consecutive trading days) from the grant date closing price of $24.98 per share and no more than one-third of the grant can vest per year during the first three years. SARs become exercisable and vest only upon the achievement of both price and time requirements. To vest, each one-third of the grant must attain 10%, 15% and 20% stock appreciation, respectively (which must be maintained for a minimum of thirty consecutive trading days) from the grant date closing price of $34.10 per share and no more than one-third of the grant can vest per year during the first three years. SARs become exercisable and vest only upon the achievement of both price and time requirements. To vest, each one-third of the grant must attain 10%, 15% and 20% stock appreciation, respectively (which must be maintained for a minimum of thirty consecutive trading days) from the grant date closing price of $41.89 per share and no more than one-third of the grant can vest per year during the first three years. SARs become exercisable and vest only upon the achievement of both price and time requirements. To vest, each one-third of the grant must attain 10%, 15% and 20% stock appreciation, respectively (which must be maintained for a minimum of thirty consecutive trading days) from the grant date closing price of $31.54 per share and no more than one-third of the grant can vest per year during the first three years. SARs become exercisable and vest only upon the achievement of both price and time requirements. To vest, each one-third of the grant must attain 10%, 15% and 20% stock appreciation, respectively (which must be maintained for a minimum of thirty consecutive trading days) from the grant date closing price of $31.48 per share and no more than one-third of the grant can vest per year during the first three years. /s/ Lisa K. Kunkle, Power of Attorney For: Robert M. Patterson 2021-08-30