Rose Vice President, Corporate Communications Avient Corporation +1 440-930-3162 kyle.rose@avient.com 6 Attachment 1 Avient Corporation Reconciliation of Adjusted Net Income and Earnings Per Share (Unaudited) (In millions, except per share data) Senior management uses comparisons of adjusted net income attributable to Avient common shareholders and diluted adjusted earnings per share (EPS) attributable to Avient common shareholders, excluding special items, to assess performance and facilitate comparability of results. Three Months Ended June 30, 2025 2024 Reconciliation to Condensed Consolidated Statements of Income $ EPS(1) $ EPS(1) Net income attributable to Avient common shareholders $ 52.6 $ 0.57 $ 33.6 $ 0.36 Special items, after-tax (Attachment 3) 5.7 0.07 21.8 0.24 Amortization expense, after-tax 15.2 0.16 14.8 0.16 Adjusted net income / EPS $ 73.5 $ 0.80 $ 70.2 $ 0.76 (1) Per share amounts may not recalculate from figures presented herein due to rounding Six Months Ended June 30, 2025 2024 Reconciliation to Condensed Consolidated Statements of Income $ EPS(1) $ EPS(1) Net income attributable to Avient common shareholders $ 32.4 $ 0.35 $ 83.0 $ 0.90 Special items, after-tax (Attachment 3) 81.4 0.89 27.3 0.30 Amortization expense, after-tax 29.7 0.32 29.7 0.32 Adjusted net income / EPS $ 143.5 $ 1.56 $ 140.0 $ 1.52 (1) Per share amounts may not recalculate from figures presented herein due to rounding 7 Attachment 2 Avient Corporation Condensed Consolidated Statements of Income (Unaudited) (In millions, except per share data) Three Months Ended June 30, Six Months Ended June 30, 2025 2024 2025 2024 Sales $ 866.5 $ 849.7 $ 1,693.1 $ 1,678.7 Cost of sales 588.6 592.1 1,152.0 1,142.9 Gross margin 277.9 257.6 541.1 535.8 Selling and administrative expense 181.8 185.1 444.3 369.3 Operating income 96.1 72.5 96.8 166.5 Interest expense, net (24.7) (26.6) (51.6) (53.2) Other expense, net (0.5) (0.9) (0.9) (1.8) Income before income taxes 70.9 45.0 44.3 111.5 Income tax expense (17.4) (11.2) (10.7) (28.0) Net income $ 53.5 $ 33.8 $ 33.6 $ 83.5 Net income attributable to noncontrolling interests (0.9) (0.2) (1.2) (0.5) Net income attributable to Avient common shareholders $ 52.6 $ 33.6 $ 32.4 $ 83.0 Earnings per share attributable to Avient common shareholders - Basic: $ 0.57 $ 0.37 $ 0.35 $ 0.91 Earnings per share attributable to Avient common shareholders - Diluted: $ 0.57 $ 0.36 $ 0.35 $ 0.90 Cash dividends declared per share of common stock $ 0.2700 $ 0.2575 $ 0.5400 $ 0.5150 Weighted-average shares used to compute earnings per common share: Basic 91.5 91.3 91.5 91.3 Diluted 91.8 92.2 91.8 92.0 8 Attachment 3 Avient Corporation Summary of Special Items (Unaudited) (In millions, except per share data) Special items (1) Three Months Ended June 30, Six Months Ended June 30, 2025 2024 2025 2024 Cost of sales: Restructuring costs, including accelerated depreciation $ (2.6) $ 0.2 $ (6.7) $ 3.8 Environmental remediation costs (1.8) (21.8) (6.7) (25.8) Reimbursement of previously incurred environmental costs 0.6 — 1.9 — Impact on cost of sales (3.8) (21.6) (11.5) (22.0) Selling and administrative expense: Restructuring and employee separation costs (2.7) (2.8) (7.8) (3.5) Legal and other (0.5) (2.3) (0.9) (5.8) Cloud-based enterprise resource planning system impairment — — (86.3) — Acquisition related costs — (0.5) — (2.1) Impact on selling and administrative expense (3.2) (5.6) (95.0) (11.4) Impact on operating income (7.0) (27.2) (106.5) (33.4) Interest expense, net - financing costs (0.3) (1.0) (2.0) (1.0) Other income, net — 0.1 — 0.1 Impact on income before income taxes (7.3) (28.1) (108.5) (34.3) Income tax benefit on special items 1.6 7.0 27.1 8.4 Tax adjustments(2) — (0.7) — (1.4) Impact of special items on net income $ (5.7) $ (21.8) $ (81.4) $ (27.3) Diluted earnings per common share impact $ (0.07) $ (0.24) $ (0.89) $ (0.30) Weighted average shares used to compute adjusted earnings per share: Diluted 91.8 92.2 91.8 92.0 (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 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. (2) Tax adjustments include the net tax impact from non-recurring income tax items and certain adjustments to uncertain tax position reserves and valuation allowances. 9 Attachment 4 Avient Corporation Condensed Consolidated Balance Sheets (In millions) (Unaudited) June 30, 2025 December 31, 2024 ASSETS Current assets: Cash and cash equivalents $ 474.5 $ 544.5 Accounts receivable, net 523.4 399.5 Inventories, net 387.5 346.8 Other current assets 109.0 131.3 Total current assets 1,494.4 1,422.1 Property, net 986.1 955.3 Goodwill 1,754.6 1,659.7 Intangible assets, net 1,529.3 1,450.4 Other non-current assets 368.9 323.6 Total assets $ 6,133.3 $ 5,811.1 LIABILITIES AND SHAREHOLDERS' EQUITY Current liabilities: Short-term and current portion of long-term debt $ 0.5 $ 7.7 Accounts payable 439.4 417.4 Accrued expenses and other current liabilities 297.4 331.0 Total current liabilities 737.3 756.1 Non-current liabilities: Long-term debt 2,020.0 2,059.3 Deferred income taxes 306.9 260.4 Other non-current liabilities 695.1 405.7 Total non-current liabilities 3,022.0 2,725.4 SHAREHOLDERS' EQUITY Avient shareholders’ equity 2,358.3 2,313.8 Noncontrolling interest 15.7 15.8 Total equity 2,374.0 2,329.6 Total liabilities and equity $ 6,133.3 $ 5,811.1 10 Attachment 5 Avient Corporation Condensed Consolidated Statements of Cash Flows (Unaudited) (In millions) Six Months Ended June 30, 2025 2024 Operating activities Net income $ 33.6 $ 83.5 Adjustments to reconcile net income to net cash provided by operating activities: Depreciation and amortization 91.9 89.2 Cloud-based enterprise resource planning system impairment 71.6 — Share-based compensation expense 4.6 9.0 Changes in assets and liabilities: Increase in accounts receivable (102.9) (97.0) Increase in inventories (20.8) (27.3) Increase in accounts payable 1.4 11.9 Environmental insurance recovery 34.0 — (Decrease) increase in incentive accruals (40.6) 5.1 Accrued expenses and other assets and liabilities, net (11.1) (11.3) Net cash provided by operating activities 61.7 63.1 Investing activities Capital expenditures (39.5) (55.8) Proceeds from plant closures — 3.4 Other investing activities — (2.1) Net cash used by investing activities (39.5) (54.5) Financing activities Payments on long-term borrowings (50.2) (4.5) Cash dividends paid (49.4) (47.0) Other financing activities (6.8) (3.3) Net cash used by financing activities (106.4) (54.8) Effect of exchange rate changes on cash 14.2 (10.2) Decrease in cash and cash equivalents (70.0) (56.4) Cash and cash equivalents at beginning of year 544.5 545.8 Cash and cash equivalents at end of period $ 474.5 $ 489.4 11 Attachment 6 Avient Corporation Business Segment Operations (Unaudited) (In millions) Operating income and earnings before interest, taxes, depreciation and amortization (EBITDA) at the segment level does not include: special items as defined in Attachment 3; corporate general and administration costs that are not allocated to segments; intersegment sales and profit eliminations; share-based compensation costs; and certain other items that are not included in the measure of segment profit and loss that is reported to and reviewed by the chief operating decision maker.

Seller may discontinue any Product sold hereunder at any time, unless Buyer and Seller have otherwise agreed in writing. 6.

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Administration, Site management, Manufacture, Laboratory, Procurement, Maintenance, Infrastructure, Warehouse and Transport 27 Avenida 34–11, Zona 12 1012 Parque Global Guatemala PolyOne Polymers India Private Limited Administration, Site management, Manufacture, Laboratory, Procurement, Maintenance, Infrastructure, Warehouse, Transport and Waste Water Treatment WA-6 Renaissance Industrial & Warehousing Complex, Vashere Maharashtra 400607 India PolyOne Polymers India Private Limited Administration, Site management, Manufacture, Laboratory, Procurement, Maintenance, Infrastructure, Warehouse, Transport and Waste Water Treatment Survey No. 344 / 1–3 Sakarda Bhadarwa Road Taluka Savli Vadodara District 39178 India PolyOne Polymers India Private Limited Administration, Site management, Manufacture, Laboratory, Procurement, Maintenance, Infrastructure, Warehouse, Transport and Waste Water Treatment Shed No 18–22, GIDC Estate Kalol Gujarat 389330 India Copyright as of the Effective Date, ABS Quality Evaluations, Inc.

अदय्तन: फरवर ी, 2021 एकाधिकार व्यापार विरोध पर Avient की वैश्विक नीति विषय अनुपालन के लिए गाइड 1 नीति अवलोकन 1 अमेरिकी एकाधिकारी व्यापार विरोधी कानूनों का अवलोकन 2 एंटीट्रस्ट कानून का उल्लंघन 3 चिंता के एंटीट्रस्ट संभावित क्षेत्र 3 निष्कर्ष 6 संभावित उल्लंघनों की सूचना देना 7 Avient एथिक्स हॉटलाइन 7 प्रतिशोध से सुरक्षा 7 एंटीट्रस्ट चेकलिस्ट 8 त्वरित संदर्भ: एंटीट्रस्ट करने-योग्य और न-करने-योग्य बातें 10 अनुपालन के लिए गाइड Avient बाजार में उचित प्रतिस्पर्धा और मुक्त उद्यम को बढ़ावा देने के लिए प्रतिबद्ध है। 6 विषय 2021 संशोधित एकाधिकार व्यापार विरोधी नीति संभावित उल्लंघनों की सूचना देना हर उस कर्मचारी, जिसके पास यह मानने का कारण है कि इस नीति का उल्लंघन हुआ है या हो सकता है, नीचे के सभी संसाधनों में से किसी एक या सभी को अपनी चिंता के बारे में तुरंत सूचित करना चाहिए ताकि पूरी तरह से जांच की जा सके। 6.

Politique antitrust mondiale d’Avient Dernière révision : Février 2021 Contenu Présentation de la politique 1 Aperçu des lois antitrust américaines 2 Violation des lois antitrust 3 Domaines potentiellement délicats en matière de lois antitrust 4 Conclusion 6 Signalement des violations potentielles 7 Ligne d’assistance Éthique d’Avient 7 Protection contre les représailles 7 Liste de contrôle des lois antitrust 8 Référence rapide : Choses À FAIRE et À NE PAS FAIRE en matière de lois antitrust 10 Guide de conformité Avient s’engage à promouvoir la concurrence loyale et la libre entreprise sur le marché. Le pouvoir de marché est généralement le pouvoir de contrôler les prix ou d’exclure d’autres personnes du marché. 6 Contenu Politique antitrust révisée 2021 Signalement des violations potentielles Tout employé qui a des raisons de croire qu’une violation de la présente Politique a eu lieu, ou pourrait avoir lieu, doit signaler rapidement le problème à l’une ou toutes les ressources ci-dessous, afin qu’une enquête détaillée puisse être menée. • Votre superviseur ou tout responsable d’Avient • Le directeur de la conformité interne, par e-mail, à l’adresse ethics.officer@avient.com • Le directeur juridique d’Avient, par e-mail, à l’adresse legal.officer@avient.com • Tout membre du département juridique • Ligne d’assistance Éthique d’Avient Ligne d’assistance Éthique d’Avient La ligne d’assistance Éthique est disponible dans le monde entier, dans plus de 20 langues, 24 heures sur 24, 7 jours sur 7, par téléphone ou sur le site web. Agissez en tout temps d’une manière qui démontrera à tout le monde que vous êtes en compétition vigoureuse. 6.

Istanbul, Turkey 6. Seabrook, Texas 6. North Baltimore, Ohio 6.

Lima, Peru 6. McHenry, Illinois 6. ITEM 6.

Louis, Missouri Jersey 5.La Mirada, Tennessee 4.Gaggenau, Germany 5.Sullivan, Missouri 5.Statesville, North California 7.Pasadena, Texas 5.Istanbul, Turkey 6.Massillon, Ohio Carolina 6.Manitowoc, 8.Seabrook, Texas 6.Barbastro, Spain 7.Norwalk, Ohio 6.Elyria, Ohio Wisconsin 9.Orangeville, Ontario, 7.Melle, Germany 8.North Baltimore, 7.La Porte, Texas 7.McMinnville, Canada 8 & 9. POLYONE CORPORATION 21 ITEM 6. For additional information about our financing arrangements, see Note 6, Financing Arrangements, to the accompanying consolidated financial statements.

Board Diversity (1) 6 of 12 Director Nominees (1) Diversity characteristics are based on information self-identified by each director to the Company. Beggs — 5,391(1) 431,250(1) 862,500(1) — — — — — — 35,625(2) 285,000(2) 570,000(2) — — — — — 2/17/2023 — — — 8,750(3) 26,250(3) — 42.93 332,439 2/17/2023 — — — — — 7,750(6) — 332,708 M.A. This grant is is described in the "What We Pay and Why: Elements of Compensation" section of this proxy statements. (6) Annual Grant of RSUs.