70-BK-121 BLACK PG 389511.01 BK LM PP SC PG 389511.03 BK LM PP SC

35-1030 BK CFCP 34-1840 BK TFPP HS 34-1520 BK CFPP

BK NOIR UV 9019-BK-99 BK PC COLOR CONCENTRATE

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2023 2023 June 30, 2023

Eastern Time on July 27, 2023. The comprehensive publication is issued in advance of Avient’s upcoming Sustainability Day to be held on September 20, 2023. Three Months Ended June 30, Six Months Ended June 30, Reconciliation to Consolidated Statements of Income 2023 2022 2023 2022 Sales $ 824.4 $ 891.0 $ 1,670.1 $ 1,783.2 Gross margin - GAAP 240.7 260.9 488.3 515.3 Special items in gross margin (Attachment 3) 14.2 (2.0) 22.2 3.8 Adjusted gross margin $ 254.9 $ 258.9 $ 510.5 $ 519.1 Adjusted gross margin as a percent of sales 30.9 % 29.1 % 30.6 % 29.1 % Operating income - GAAP 62.3 100.1 119.4 202.3 Special items in operating income (Attachment 3) 21.8 1.8 48.9 8.6 Adjusted operating income $ 84.1 $ 101.9 $ 168.3 $ 210.9 Adjusted operating income as a percent of sales 10.2 % 11.4 % 10.1 % 11.8 % Three Months Ended June 30, Six Months Ended June 30, Reconciliation to EBITDA and Adjusted EBITDA: 2023 2022 2023 2022 Net income from continuing operations – GAAP $ 22.3 $ 62.8 $ 43.6 $ 127.5 Income tax expense 10.4 22.7 18.1 42.7 Interest expense, net 29.4 16.2 58.2 33.1 Depreciation and amortization 47.6 36.5 98.1 74.3 EBITDA from continuing operations $ 109.7 $ 138.2 $ 218.0 $ 277.6 Special items, before tax 21.7 0.9 49.0 7.6 Depreciation and amortization included in special items (0.1) (1.1) (1.9) (3.2) Adjusted EBITDA $ 131.3 $ 138.0 $ 265.1 $ 282.0 Adjusted EBITDA as a % of sales 15.9 % 15.5 % 15.9 % 15.8 % NEWS RELEASE Attachment 1

CLEVELAND – November 2, 2023 – Avient Corporation (NYSE: AVNT), a leading provider of specialized and sustainable material solutions, today announced its third quarter 2023 results. Eastern Time on November 2, 2023. 3 Webcast Details Avient will host a webcast on Thursday, November 2, 2023 at 8:00 a.m. Three Months Ended September 30, Nine Months Ended September 30, Reconciliation to Consolidated Statements of Income 2023 2022 2023 2022 Sales $ 753.7 $ 823.3 $ 2,423.8 $ 2,606.5 Gross margin - GAAP 195.3 195.4 683.6 710.7 Special items in gross margin (Attachment 3) 40.2 31.8 62.4 35.6 Adjusted gross margin $ 235.5 $ 227.2 $ 746.0 $ 746.3 Adjusted gross margin as a percent of sales 31.2 % 27.7 % 30.8 % 28.6 % Operating income - GAAP 34.3 40.6 153.7 242.9 Special items in operating income (Attachment 3) 41.0 40.2 89.9 48.8 Adjusted operating income $ 75.3 $ 80.8 $ 243.6 $ 291.7 Adjusted operating income as a percent of sales 10.0 % 9.8 % 10.1 % 11.2 % Three Months Ended September 30, Nine Months Ended September 30, Reconciliation to EBITDA and Adjusted EBITDA: 2023 2022 2023 2022 Net income from continuing operations – GAAP $ 5.1 $ (27.8) $ 48.7 $ 99.7 Income tax (benefit) expense (0.1) (1.2) 18.0 41.5 Interest expense, net 30.3 37.3 88.5 70.4 Depreciation and amortization 46.4 39.8 144.5 113.7 EBITDA from continuing operations $ 81.7 $ 48.1 $ 299.7 $ 325.3 Special items, before tax 43.2 82.0 92.2 89.6 Interest expense included in special items (2.2) (10.0) (2.2) (10.0) Depreciation and amortization included in special items — (0.8) (1.9) (4.0) Adjusted EBITDA $ 122.7 $ 119.3 $ 387.8 $ 400.9 Adjusted EBITDA as a % of sales 16.3 % 14.5 % 16.0 % 15.4 % NEWS RELEASE Attachment 1