ORANGE 471C W/LM PP FR 8-6 LMS-1000

VERDE 3242C-1 LM PP FR 8-6 LMS-1000

BLACK W/WT LM NYLON PP FR 8-6 LMS-1000

Common shares represented by a properly signed proxy card will be voted in accordance with the choices marked on the card. If no choices are marked, the shares will be voted FOR the: (1) election of twelve Director nominees to our Board; (2) approval, on an advisory basis, of Named Executive Officer compensation; (3) approval, on an advisory basis, of the frequency of future advisory votes to approve Named Executive Officer compensation; (4) approval of the amendment and restatement of the Avient Corporation 2020 Equity and Incentive Compensation Plan; and (5) ratification of the appointment of Ernst & Young LLP ("EY") as our independent registered public accounting firm for the fiscal year ending December 31, 2023. December 31, 2022 2021 2020 Net income from continuing operations attributable to Avient shareholders $ 82.8 $ 151.8 $71.0 Special items, after tax(1) 116.2 50.0 24.8 Amortization expense, after-tax 49.0 44.9 33.6 Adjusted net income / EPS $ 248.0 $ 246.7 $ 129.4 Diluted Shares 92.2 92.1 90.6 Adjusted EPS attributable to Avient common shareholders from continuing operations $ 2.69 $ 2.68 $ 1.43 (1) Special items include charges related to specific strategic initiatives or financial restructuring such as: consolidation of operations; debt extinguishment costs; costs incurred directly in relation to acquisitions or divestitures; employee separation costs resulting from personnel reduction programs, plant realignment costs, executive separation agreements; asset impairments; settlement gains or losses and mark-to-market adjustments associated with actuarial gains and losses on pension and other post-retirement benefit plans; environmental remediation costs, fines, penalties and related insurance recoveries related to facilities no longer owned or closed in prior years; gains and losses on the divestiture of operating businesses, joint ventures and equity investments; gains and losses on facility or property sales or disposals; results of litigation, fines or penalties, where such litigation (or action relating to the fines or penalties) arose prior to the commencement of the performance period; one-time, non-recurring items; and the effect of changes in accounting principles or other such laws or provisions affecting reported results.

Common shares represented by a properly signed proxy card will be voted in accordance with the choices marked on the card. If no choices are marked, the shares will be voted: (1) to elect the nominees listed in the “Proposal 1 – Election of Board of Directors” section of this proxy statement; (2) to approve, on an advisory basis, our Named Executive Officer compensation; (3) to approve, on an advisory basis, the freff quency of future advisory votes to approve our Named Executive Officff er compensation; (4) to approve the PolyOne Corporation 2017 Equity and Incentive Compensation Plan; and (5) to ratify the appointment of Ernst & Young LLP as our independent registered public accounting firm for the fiscal year ending December 31, 2017. Special items include charges related to specific strategic initiatives or financial restructuring, such as: consolidation of operations; debt extinguishment costs; costs incurred directly in relation to acquisitions or divestitures; employee separation costs resulting froff m personnel reduction programs, plant realignment costs; executive separation agreements; asset impairments; mark-to-market adjustments associated with actuarial gains and losses on pension and other post-retirement benefitff plans; environmental remediation costs, finff es, penalties and related insurance recoveries related to facilities no longer owned or closed in prior years; gains and losses on the divestiture of operating businesses, joint ventures and equity investments; gains and losses on facff ility or property sales or disposals; results of litigation, fines or penalties, where such litigation (or action relating to the fines or penalties) arose prior to the commencement of the perforff mance period; one-time, non-recurring items; and the effeff ct of changes in accounting principles or other such laws or provisions affecting reported results

Avient earned its highest marks in the environmental category, thanks to our initiatives around waste recycling, emission reduction, and use of renewable energy. Year Ended December 31, 2020 Year Ended December 31, 2019 Reconciliation of Pro Forma Adjusted Earnings per Share Avient Special Items(1) Adjusted Avient Clariant MB Pro Forma Adjustments(2) Pro Forma Adjusted Avient Avient Special Items(1) Adjusted Avient Clariant MB Pro Forma Adjustments(2) Pro Forma Adjusted Avient Sales $ 3,242.1 $ — $ 3,242.1 $ 540.4 $ 3,782.5 $ 2,862.7 $ — $ 2,862.7 $ 1,118.6 $ 3,981.3 Operating income $ 189.3 $ 73.7 $ 263.0 $ 45.0 $ 308.0 $ 156.8 $ 71.7 $ 228.5 $ 72.9 $ 301.4 Interest expense, net (74.6) 10.1 (64.5) (18.1) (82.6) (59.5) — (59.5) (33.4) (92.9) Other income, net 24.3 (17.6) 6.7 — 6.7 12.1 (10.0) 2.1 — 2.1 Income taxes (5.2) (41.4) (46.6) (6.2) (52.8) (33.7) (5.9) (39.6) (9.1) (48.7) Net income attributable to noncontrolling interests (1.8) — (1.8) — (1.8) (0.2) — (0.2) — (0.2) Net income from continuing operations attributable to Avient shareholders $ 132.0 $ 24.8 $ 156.8 $ 20.7 $ 177.5 $ 75.5 $ 55.8 $ 131.3 $ 30.4 $ 161.7 Weighted average diluted shares 90.6 77.7 Impact to diluted shares from January 2020 equity offering 1.5 15.3 Pro forma weighted average diluted shares 92.1 93.0 Pro forma adjusted EPS $ 1.93 $ 1.74 Year Ended December 31, 2021 Reconciliation of Adjusted Earnings per Share: Avient Special Items(1) Adjusted Avient Sales $ 4,818.8 $ — $ 4,818.8 Operating income $ 381.2 $ 47.8 $ 429.0 Interest expense, net (75.3) — (75.3) Other income, net (1.3) 9.3 8.0 Income taxes (74.0) (7.1) (81.1) Net income attributable to noncontrolling interests 0.2 — 0.2 Net income from continuing operations attributable to Avient shareholders $ 230.8 $ 50.0 $ 280.8 Weighted average diluted shares 92.1 Adjusted EPS - excluding special items $ 3.05 (1) Special items include charges related to specific strategic initiatives or financial restructuring such as: consolidation of operations; debt extinguishment costs; costs incurred directly in relation to acquisitions or divestitures; employee separation costs resulting from personnel reduction programs, plant realignment costs, executive separation agreements; asset impairments; settlement gains or losses and mark-to-market adjustments associated with actuarial gains and losses on pension and other post-retirement benefit plans; environmental remediation costs, fines, penalties and related insurance recoveries related to facilities no longer owned or closed in prior years; gains and losses on the divestiture of operating businesses, joint ventures and equity investments; gains and losses on facility or property sales or disposals; results of litigation, fines or penalties, where such litigation (or action relating to the fines or penalties) arose prior to the commencement of the performance period; one-time, non-recurring items; and the effect of changes in accounting principles or other such laws or provisions affecting reported results

Number of initiatives Total estimated annual CO2e savings in metric tonnes CO2e (only for rows marked *) Under investigation 0 0 To be implemented* 10 35,318 Implementation commenced* 23 724 Avient CDP Climate Change Questionnaire 2021 Tuesday, August 3, 2021 43 Implemented* 104 2,585 Not to be implemented 0 0 C4.3b (C4.3b) Provide details on the initiatives implemented in the reporting year in the table below.

PP FR 8-6 LMS-1000

PP FR 8-6 LMS-1000

PP FR 8-6 LMS-1000