Globally, as of September 2023, almost 3,400 companies have set science-based goals – with 2,400 of those being net-zero commitments – in order to address greenhouse gas emission concerns (Science Based Targets).

April 30, 2021 April 30, 2021 April 30, 2021

Limited PO Box 2137, Jeddah 22758, Saudi Arabia Has been assessed and found to meet the requirements of ISO 45001:2018 This certificate is valid for the following scope of operations: Production and Supply of Color and Additive Master Batches Authorised by: Stan Wright Director Date of Certificate Issue: 30 December 2021 Certificate Valid Until: 29 December 2024 Recertification audit before 30 November 2024. Certified since 30 December 2021.

Eastern Time on July 30, 2021. 3 *Pro Forma The company acquired the Clariant Masterbatch business (“CMB”) on July 1, 2020 (the “Acquisition Date”). ET on Friday, July 30, 2021. Three Months Ended June 30, Six Months Ended June 30, Reconciliation to Consolidated Statements of Income 2021 2020 2021 2020 Sales $ 1,235.2 $ 609.1 $ 2,397.5 $ 1,320.6 Gross margin - GAAP 288.7 149.7 591.1 321.2 Special items in gross margin (Attachment 3) 12.6 (4.2) 10.4 (4.0) Adjusted gross margin $ 301.3 $ 145.5 $ 601.5 $ 317.2 Adjusted gross margin as a percent of sales 24.4 % 23.9 % 25.1 % 24.0 % Operating income - GAAP 108.1 38.0 228.5 90.8 Special items in operating income (Attachment 3) 14.2 9.0 16.6 18.7 Adjusted operating income $ 122.3 $ 47.0 $ 245.1 $ 109.5 Adjusted operating income as a percent of sales 9.9 % 7.7 % 10.2 % 8.3 % The table below reconciles pre-special income tax expense and the pre-special effective tax rate to their most comparable US GAAP figures.

Concentrated Acid - 30% H2SO4, 24 HRS, 23°C Nylon samples were almost completely dissolved after one day, while the Edgetek PKE bars are still visible. Gasoline - 30% glass-filled (GF) grade, dry as molded (DAM), room temperature Testing methodology is an adaptation from ASTM D543 • Reapply freshly soaked gauze pad every 24 hours to prevent from drying out • Repeat for a total of 72 hours • Tensile properties recorded *Chemical resistance data for DEET, motor oil, glass cleaner, and sunscreen available upon request KEY CHARACTERISTICS Figure 1 Figure 2 3.34 3.84 3.63 1.96 2.21 0.99 3.43 3.86 3.93 1.76 3.49 2.01 3.26 3.66 3.74 1.45 1.06 0.989 2.98 3.99 3.41 1.41 1.07 0.88 0 0.5 1 1.5 2 2.5 3 3.5 4 4.5 30% LGF PKE 30% LGF PA6 30% LGF PA66 30% SGF PKE 30% SGF PA6 30% SGF PA66 Ft -lb /in Notched Izod Impact ASTM D256 23C DAM 23C Conditioned -40C DAM -40C Conditioned 1.47 1.37 1.37 0 0.2 0.4 0.6 0.8 1 1.2 1.4 1.6 Glass-Filled PKE Glass-Filled PA6 Glass-Filled PA66 g/ cm 3 Density of Polyketone vs Nylon ASTM D792 LESS MOISTURE ABSORPTION THAN NYLON 30% Short Glass Fiber (SGF) Comparison Moisture uptake, environmental chamber 62% RH, 70°C SIMILAR DENSITY TO NYLON ASTM D792 COMPARABLE AND CONSISTENT IMPACT PERFORMANCE* Notched Izod Impact (ASTM D256) of LGF and SGF for DAM and Conditioned Materials *3,000 hr weathering data available upon request KEY CHARACTERISTICS 1.844.4AVIENT www.avient.com Copyright © 2024, Avient Corporation. Edgetek™ PKE Glass-Filled Portfolio Polyketone formulations with 20, 30, or 40% short glass fiber reinforcement available in natural or black Complēt™ PKE Portfolio Long fiber reinforced polyketone formulations with 30, 40, or 50% fiber loading and available in natural or black, and available in non-PFAS* formulations to achieve a UL 94 V-0 flame rating at 1.5 mm ET8900-0001 20GF NAT LGF30-PKE 1088 NAT ET8900-0002 30GF NAT LGF30-PKE 2020 BLK ET8900-0003 40GF NAT LGF40-PKE 1088 NAT ET8900-0004 20GF BLK LGF40-PKE 2020 BLK ET8900-0005 30GF BLK LGF50-PKE 1088 NAT ET8900-0006 40GF BLK LGF50-PKE 2020 BLK FEATURED PRODUCTS * Non-PFAS flame-retardant (FR) grades are manufactured without intentionally added PFAS-based raw materials.

Glendale, Arizona 30. Repayments in the amount of one percent of the aggregate principal amount as of August 3, 2016 are payable annually, while the remaining balance matures on January 30, 2026. We expect that the full restructuring plan will be implemented through 2023 and anticipate that we will incur approximately $75 million of charges in connection with the restructuring plan.

Rose Vice President, Corporate Communications Avient Corporation +1 440-930-3162 kyle.rose@avient.com mailto:giuseppe.disalvo@avient.com mailto:kyle.rose@avient.com 7 Attachment 1 Avient Corporation Summary of Condensed Consolidated Statements of Income (Unaudited) (In millions, except per share data) Three Months Ended September 30, Nine Months Ended September 30, 2021 2020 2021 2020 Sales $ 1,219.8 $ 924.5 $ 3,617.3 $ 2,245.1 Operating Income 78.7 33.5 307.2 124.3 Net income from continuing operations attributable to Avient shareholders 52.9 1.7 201.0 57.8 Basic earnings per share from continuing operations attributable to Avient shareholders $ 0.58 $ 0.02 $ 2.20 $ 0.64 Diluted earnings per share from continuing operations attributable to Avient shareholders $ 0.57 $ 0.02 $ 2.18 $ 0.64 Senior management uses comparisons of adjusted net income from continuing operations attributable to Avient shareholders and diluted adjusted earnings per share (EPS) from continuing operations attributable to Avient shareholders, excluding special items, to assess performance and facilitate comparability of results. Three Months Ended September 30, 2021 Three Months Ended September 30, 2020 Reconciliation to Condensed Consolidated Statements of Income $ EPS $ EPS Net income from continuing operations attributable to Avient shareholders $ 52.9 $ 0.57 $ 1.7 $ 0.02 Special items, after tax (Attachment 3) 11.7 0.13 40.3 0.44 Adjusted net income / EPS - excluding special items $ 64.6 $ 0.70 $ 42.0 $ 0.46 Nine Months Ended September 30, 2021 Nine Months Ended September 30, 2020 Reconciliation to Condensed Consolidated Statements of Income $ EPS $ EPS Net income from continuing operations attributable to Avient shareholders $ 201.0 $ 2.18 $ 57.8 $ 0.64 Special items, after tax (Attachment 3) 26.0 0.28 51.5 0.57 Adjusted net income / EPS - excluding special items $ 227.0 $ 2.46 $ 109.3 $ 1.21 8 Attachment 2 Avient Corporation Condensed Consolidated Statements of Income (Unaudited) (In millions, except per share data) Three Months Ended September 30, Nine Months Ended September 30, 2021 2020 2021 2020 Sales $ 1,219.8 $ 924.5 $ 3,617.3 $ 2,245.1 Cost of sales 964.4 714.3 2,770.8 1,713.7 Gross margin 255.4 210.2 846.5 531.4 Selling and administrative expense 176.7 176.7 539.3 407.1 Operating income 78.7 33.5 307.2 124.3 Interest expense, net (19.0) (29.7) (57.8) (55.3) Other income, net 1.4 1.5 4.1 12.6 Income from continuing operations before income taxes 61.1 5.3 253.5 81.6 Income taxes (8.5) (2.7) (51.8) (22.5) Net income from continuing operations 52.6 2.6 201.7 59.1 Loss from discontinued operations, net of income taxes — — — (0.5) Net income 52.6 2.6 201.7 58.6 Net loss (income) attributable to noncontrolling interests 0.3 (0.9) (0.7) (1.3) Net income attributable to Avient common shareholders $ 52.9 $ 1.7 $ 201.0 $ 57.3 Earnings per share attributable to Avient common shareholders - Basic: Continuing operations $ 0.58 $ 0.02 $ 2.20 $ 0.64 Discontinued operations — — — — Total $ 0.58 $ 0.02 $ 2.20 $ 0.64 Earnings per share attributable to Avient common shareholders - Diluted: Continuing operations $ 0.57 $ 0.02 $ 2.18 $ 0.64 Discontinued operations — — — (0.01) Total $ 0.57 $ 0.02 $ 2.18 $ 0.63 Cash dividends declared per share of common stock $ 0.2125 $ 0.2025 $ 0.6375 $ 0.6075 Weighted-average shares used to compute earnings per common share: Basic 91.4 91.5 91.3 89.7 Diluted 92.2 91.9 92.1 90.7 9 Attachment 3 Avient Corporation Summary of Special Items (Unaudited) (In millions, except per share data) Special items (1) Three Months Ended September 30, Nine Months Ended September 30, 2021 2020 2021 2020 Cost of sales: Restructuring costs, including accelerated depreciation and amortization $ (5.3) $ (1.3) $ (8.6) $ (2.5) Environmental remediation costs (9.4) (15.8) (22.4) (19.3) Reimbursement of previously incurred environmental costs — — 4.5 8.7 Acquisition related costs (2.6) (10.5) (1.2) (10.5) Impact on cost of sales (17.3) (27.6) (27.7) (23.6) Selling and administrative expense: Restructuring, legal and other — (4.2) (1.7) (9.5) Acquisition earn-out adjustments — (1.5) — (2.5) Acquisition related costs (2.7) (7.1) (7.2) (23.5) Impact on selling and administrative expense (2.7) (12.8) (8.9) (35.5) Impact on operating income (20.0) (40.4) (36.6) (59.1) Costs related to committed financing in interest expense, net — (9.6) — (10.1) Other income, net 0.1 — 0.1 0.3 Pension settlement gain and mark-to-market adjustment — — — 6.9 Impact on income from continuing operations before income taxes (19.9) (50.0) (36.5) (62.0) Income tax benefit on above special items 4.6 12.7 8.9 15.4 Tax adjustments(2) 3.6 (3.0) 1.6 (4.9) Impact of special items on net income from continuing operations attributable to Avient Shareholders $ (11.7) $ (40.3) $ (26.0) $ (51.5) Diluted earnings per common share impact $ (0.13) $ (0.44) $ (0.28) $ (0.57) Weighted average shares used to compute adjusted earnings per share: Diluted 92.2 91.9 92.1 90.7 (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 Three Months Ended September 30, Nine Months Ended September 30, Reconciliation to Consolidated Statements of Income 2021 2020 2021 2020 Sales $ 1,219.8 $ 924.5 $ 3,617.3 $ 2,245.1 Gross margin - GAAP 255.4 210.2 846.5 531.4 Special items in gross margin (Attachment 3) 17.3 27.6 27.7 23.6 Adjusted gross margin $ 272.7 $ 237.8 $ 874.2 $ 555.0 Adjusted gross margin as a percent of sales 22.4 % 25.7 % 24.2 % 24.7 % Operating income - GAAP 78.7 33.5 307.2 124.3 Special items in operating income (Attachment 3) 20.0 40.4 36.6 59.1 Adjusted operating income $ 98.7 $ 73.9 $ 343.8 $ 183.4 Adjusted operating income as a percent of sales 8.1 % 8.0 % 9.5 % 8.2 % The table below reconciles pre-special income tax expense and the pre-special effective tax rate to their most comparable US GAAP figures.

Co m pr es si on S et (% ) Temperature (°C) 0 25 50 75 100 125 150 175 200 225 250 0 50 40 30 20 10 45A 55A 64A General-purpose silicone rubber COMPRESSION SET vs. YOUR NEXT MOVE Copyright © 2023, Avient Corporation. Learn more https://www.avient.com/tpeknowledgecenter https://www.avient.com Next Page 2: Previous Page 2: Next Page 3: Previous Page 3: Next Page 4: Previous Page 4: Next Page 8: Previous Page 8: Next Page 5: Previous Page 5: Next Page 9: Previous Page 9: Next Page 6: Previous Page 6: Previous Page 10: Next Page 10: Next Page 7: Previous Page 7: Next Page 11: Previous Page 11: Next Page 12: Previous Page 12: Next Page 13: Previous Page 13: Next Page 32: Previous Page 33: Next Page 34: Previous Page 37: Next Page 14: Previous Page 14: Next Page 15: Previous Page 16: Next Page 16: Previous Page 17: Next Page 17: Previous Page 18: Next Page 33: Previous Page 34: Next Page 18: Previous Page 19: Next Page 19: Previous Page 20: Next Page 20: Previous Page 21: Next Page 21: Previous Page 22: Next Page 22: Previous Page 23: Next Page 23: Previous Page 24: Next Page 24: Previous Page 25: Next Page 25: Previous Page 26: Next Page 26: Previous Page 27: Next Page 27: Previous Page 28: Next Page 28: Previous Page 29: Next Page 29: Previous Page 30: Next Page 30: Previous Page 31: Next Page 31: Previous Page 32: Previous Page 15: Previous Page 35: Previous Page 36:

All Rights Reserved 2025 30 Reconciliation of Non-GAAP financial measures Reconciliation to EBITDA and Adjusted EBITDA Three months ended March 31, 2025 2024 $ Millions $ Millions Sales Color, Additives and Inks 519.7 515.3 Specialty Engineered Materials 308.4 314.4 Corporate (1.5) (0.7) Sales 826.6 829.0 Operating income Color, Additives and Inks 78.6 74.8 Specialty Engineered Materials 47.1 53.4 Corporate (125.0) (34.2) Operating income 0.7 94.0 Depreciation and amortization Color, Additives and Inks 21.7 21.9 Specialty Engineered Materials 21.5 19.6 Corporate 2.1 2.8 Depreciation and amortization 45.3 44.3 EBITDA Earnings before interest, taxes, depreciation and amortization Color, Additives and Inks 100.3 96.7 Specialty Engineered Materials 68.6 73.0 Corporate (122.9) (31.4) Other expense, net (0.4) (0.9) EBITDA 45.6 137.4 Special items, before tax 101.2 6.2 Interest expense included in special items (1.7) - Depreciation and amortization included in special items (0.4) (0.5) Adjusted EBITDA 144.7 143.1 Adjusted EBITDA as a percent of sales Color, Additives and Inks 19.3% 18.8% Specialty Engineered Materials 22.2% 23.2% PAGE 2 OF 3 Copyright © . All Rights Reserved 2025 31 Reconciliation of Non-GAAP financial measures Reconciliation to condensed consolidated statements of income Three months ended March 31, 2023 $ Millions EPS (in $) Net income from continuing operations attributable to Avient common shareholders 20.8 0.23 Special items, after-tax 22.3 0.24 Amortization expense, after-tax 15.1 0.16 Adjusted net income / EPS 58.2 0.63 1 Reconciliation to EBITDA and Adjusted EBITDA Year ended December 31, 2024 $ Millions Net income – GAAP 170.7 Income tax expense 54.1 Interest expense 105.6 Depreciation & amortization 179.7 EBITDA 510.1 Special items, before tax 20.1 Interest expense included in special items (2.3) Depreciation & amortization included in special items (1.5) Adjusted EBITDA 526.4 Adjusted EBITDA as a percent of sales 16.2% PAGE 3 OF 3 Reconciliation to condensed consolidated statements of income Three months ended June 30, 2024 $ Millions EPS (in $) Net income attributable to Avient common shareholders 33.6 0.36 Special items, after-tax 21.8 0.24 Amortization expense, after-tax 14.8 0.16 Adjusted net income / EPS 70.2 0.76 Reconciliation to condensed consolidated statements of income Year ended December 31, 2024 $ Millions EPS (in $) Net (loss) income attributable to Avient common shareholders 169.5 1.84 Special items, after-tax 15.9 0.17 Amortization expense, after-tax 59.5 0.65 Adjusted net income / EPS 244.9 2.66 Per share amounts may not recalculate from figures present herein due to rounding 1 1 1 Q4 2024 Earnings webcast Slide 1 Slide 2: Disclaimer Slide 3: Avient at a glance... Slide 23 Slide 24: Avient 2024 sales Slide 25: Color, Additives & Inks Slide 26: Specialty Engineered Materials Slide 27: Avient 2024 regional sales, by end market Slide 28: Raw material basket Slide 29: Reconciliation of Non-GAAP financial measures (UNAUDITED) Slide 30: Reconciliation of Non-GAAP financial measures (UNAUDITED) Slide 31: Reconciliation of Non-GAAP financial measures (UNAUDITED)