Yes ☑ No ☐ Indicate by check mark if the registrant is not required to file reports pursuant to Section 13 or Section 15(d) of the Act. In addition, 2022 included a $30.9 million mark-to-market loss on derivative contracts entered into to hedge the purchase price of the APM Acquisition. In 2022, we recognized a $28.5 million mark-to-market loss that was primarily the result of actual asset returns that were lower than our assumed returns.

Adjusted earnings per share increased 42% to $0.44, marking the 18th consecutive quarter of double-digit adjusted earnings per share growth; GAAP EPS totaled $0.31 versus $0.16 in the prior year quarter, a 94% increase Special items include charges related to specific strategic initiatives or financial restructurings such as: consolidation of operations; debt extinguishment costs; employee separation costs resulting from personnel reduction programs, plant phase-out costs, executive separation agreements; asset impairments; mark-to-market adjustments associated with actuarial gains and losses on pension and other postretirement benefit plans; environmental remediation costs, fines, penalties, remediation costs 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; unrealized gains and losses from foreign currency option contracts; one-time, non-recurring items; and the effect of changes in accounting principles or other such laws or provisions affecting reported results.

This is due to the inherent difficulty of forecasting the timing and amount of certain items, such as, but not limited to, environmental remediation costs, mark-to-market adjustments associated with benefit plans, acquisition related costs, and other non-routine costs. 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, 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 performanceperiod; one-time, non-recurring items; and the effect of changes in accounting principles or other such laws or provisions affecting reported results.

Mark-to-market on derivatives Pension and post retirement mark-to-market adjustment and other 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-retirementbenefit 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; andthe effect of changes in accounting principles or other such laws or provisions affecting reported results.

This is due to the inherent difficulty of forecasting the timing and amount of certain items, such as, but not limited to, environmental remediation costs and associated recoveries, mark-to-market adjustments on pension and other post-retirement obligations, acquisition-related charges, and other non-routine costs. Pension and post retirement mark-to-market adjustments and other 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 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 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.

Pension and other post-retirement mark-to-market adjustment Pension and other post-retirement mark-to-market adjustment Special items include charges related to specific strategic initiatives or financial restructurings such as: consolidation of operations; debt extinguishment costs; employee separation costs resulting from personnel reduction programs, plant phase-out costs, executive separation agreements; asset impairments; mark-to-market adjustments associated with actuarial gains and losses on pension and other postretirement benefit plans; environmental remediation costs, fines, penalties, remediation costs 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; unrealized gains and losses from foreign currency option contracts; one-time, non-recurring items; and the effect of changes in accounting principles or other such laws or provisions affecting reported results.

Pension settlement gain and mark-to-market adjustment 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. Pension settlement gain and mark-to-market adjustment

This is due to the inherent difficulty of forecasting the timing and amount of certain items, such as, but not limited to, environmental remediation costs, mark-to-market adjustments associated with benefit plans, acquisition related costs, and other non-routine costs. Mark-to-market on derivative instruments 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 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, 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.

Adjusted earnings per share increased 38% to $0.51, marking the 19th consecutive quarter of double-digit adjusted EPS growth; GAAP EPS totaled $0.33 versus $0.39 in the prior year quarter This marks our 19th consecutive quarter of year-over-year double-digit adjusted EPS growth – an impressive accomplishment reflecting the power and sustainability of our strategy." Special items include charges related to specific strategic initiatives or financial restructurings such as: consolidation of operations; debt extinguishment costs; employee separation costs resulting from personnel reduction programs, plant phase-out costs, executive separation agreements; asset impairments; mark-to-market adjustments associated with actuarial gains and losses on pension and other postretirement benefit plans; environmental remediation costs, fines, penalties, remediation costs 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; unrealized gains and losses from foreign currency option contracts; one-time, non-recurring items; and the effect of changes in accounting principles or other such laws or provisions affecting reported results.

Three Months Ended December 31, 2021 2020 Reconciliation to Condensed Consolidated Statements of Income $ EPS(1) $ EPS(1) Net income from continuing operations attributable to Avient shareholders $ 29.8 $ 0.32 $ 74.2 $ 0.81 Special items, after tax (Attachment 3) 24.0 0.26 (26.7) (0.29) Adjusted net income / EPS - excluding special items $ 53.8 $ 0.58 $ 47.5 $ 0.52 (1) Per share amounts may not recalculate from figures presented herein due to rounding Year Ended December 31, 2021 2020 Reconciliation to Condensed Consolidated Statements of Income $ EPS(1) $ EPS(1) Net income from continuing operations attributable to Avient shareholders $ 230.8 $ 2.51 $ 132.0 $ 1.46 Special items, after tax (Attachment 3) 50.0 0.54 24.8 0.27 Adjusted net income / EPS - excluding special items $ 280.8 3.05 $ 156.8 1.73 (1) Per share amounts may not recalculate from figures presented herein due to rounding 8 Attachment 2 Avient Corporation Condensed Consolidated Statements of Income (Unaudited) (In millions, except per share data) Three Months Ended December 31, Year Ended December 31, 2021 2020 2021 2020 Sales $ 1,201.5 $ 997.0 $ 4,818.8 $ 3,242.1 Cost of sales 948.4 744.1 3,719.2 2,457.8 Gross margin 253.1 252.9 1,099.6 784.3 Selling and administrative expense 179.1 187.9 718.4 595.0 Operating income 74.0 65.0 381.2 189.3 Interest expense, net (17.5) (19.3) (75.3) (74.6) Other (expense) income, net (5.4) 11.7 (1.3) 24.3 Income from continuing operations before income taxes 51.1 57.4 304.6 139.0 Income tax (expense) benefit (22.2) 17.3 (74.0) (5.2) Net income from continuing operations 28.9 74.7 230.6 133.8 Income (loss) from discontinued operations, net of income taxes — 0.1 — (0.4) Net income 28.9 74.8 230.6 133.4 Net loss (income) attributable to noncontrolling interests 0.9 (0.5) 0.2 (1.8) Net income attributable to Avient common shareholders $ 29.8 $ 74.3 $ 230.8 $ 131.6 Earnings per share attributable to Avient common shareholders - Basic: Continuing operations $ 0.33 $ 0.81 $ 2.53 $ 1.47 Discontinued operations — — — (0.01) Total $ 0.33 $ 0.81 $ 2.53 $ 1.46 Earnings per share attributable to Avient common shareholders - Diluted: Continuing operations $ 0.32 $ 0.81 $ 2.51 $ 1.46 Discontinued operations — — — (0.01) Total $ 0.32 $ 0.81 $ 2.51 $ 1.45 Cash dividends declared per share of common stock $ 0.2375 $ 0.2125 $ 0.8750 $ 0.8200 Weighted-average shares used to compute earnings per common share: Basic 91.5 91.4 91.4 90.1 Diluted 92.4 92.1 92.1 90.6 9 Attachment 3 Avient Corporation Summary of Special Items (Unaudited) (In millions, except per share data) Special items (1) Three Months Ended December 31, Year Ended December 31, 2021 2020 2021 2020 Cost of sales: Restructuring costs, including accelerated depreciation $ (6.0) $ (1.8) $ (14.6) $ (4.3) Environmental remediation costs (0.5) (1.1) (22.9) (20.4) Reimbursement of previously incurred environmental costs — — 4.5 8.7 Acquisition related costs 0.6 1.2 (0.6) (9.3) Impact on cost of sales (5.9) (1.7) (33.6) (25.3) Selling and administrative expense: Restructuring, legal and other (4.2) (13.0) (5.9) (22.5) Acquisition earn-out adjustments — 1.5 — (1.0) Acquisition related costs (1.1) (1.4) (8.3) (24.9) Impact on selling and administrative expense (5.3) (12.9) (14.2) (48.4) Impact on operating income (11.2) (14.6) (47.8) (73.7) Costs related to committed financing in interest expense, net — — — (10.1) Other income, net — 0.1 0.1 0.4 Pension settlement/curtailment and mark-to-market adjustment (loss) gain (9.4) 10.3 (9.4) 17.2 Impact on income from continuing operations before income taxes (20.6) (4.2) (57.1) (66.2) Income tax benefit (expense) on above special items 4.1 (1.3) 13.0 14.1 Tax adjustments(2) (7.5) 32.2 (5.9) 27.3 Impact of special items on net income from continuing operations attributable to Avient Shareholders $ (24.0) $ 26.7 $ (50.0) $ (24.8) Diluted earnings per common share impact of special items on net income from continuing operations attributable to Avient shareholders $ (0.26) $ 0.29 $ (0.54) $ (0.27) Weighted average shares used to compute adjusted earnings per share: Diluted 92.4 92.1 92.1 90.6 (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