You are advised to consult any further disclosures we make on related subjects in our reports on Form 10-Q, 8-K and 10-K that we provide to the Securities and Exchange Commission. 5 Investor Relations Contact: Giuseppe (Joe) Di Salvo Vice President, Treasurer and Investor Relations Avient Corporation +1 440-930-1921 giuseppe.disalvo@avient.com Media Contact: Kyle G. Three Months Ended March 31, 2025 2024 Reconciliation to Condensed Consolidated Statements of Income $ EPS(1) $ EPS(1) Net (loss) income attributable to Avient common shareholders $ (20.2) $ (0.22) $ 49.4 $ 0.54 Special items, after-tax (Attachment 3) 75.7 0.82 5.5 0.06 Amortization expense, after-tax 14.5 0.16 14.9 0.16 Adjusted net income / EPS $ 70.0 $ 0.76 $ 69.8 $ 0.76 (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 March 31, 2025 2024 Sales $ 826.6 $ 829.0 Cost of sales 563.4 550.8 Gross margin 263.2 278.2 Selling and administrative expense 262.5 184.2 Operating income 0.7 94.0 Interest expense, net (26.9) (26.6) Other expense, net (0.4) (0.9) (Loss) income before income taxes (26.6) 66.5 Income tax benefit (expense) 6.7 (16.8) Net (loss) income $ (19.9) $ 49.7 Net income attributable to noncontrolling interests (0.3) (0.3) Net (loss) income attributable to Avient common shareholders $ (20.2) $ 49.4 (Loss) earnings per share attributable to Avient common shareholders - Basic: $ (0.22) $ 0.54 (Loss) earnings per share attributable to Avient common shareholders - Diluted: $ (0.22) $ 0.54 Cash dividends declared per share of common stock $ 0.2700 $ 0.2575 Weighted-average shares used to compute (loss) earnings per common share: Basic 91.5 91.2 Diluted 91.5 92.0 8 Attachment 3 Avient Corporation Summary of Special Items (Unaudited) (In millions, except per share data) Special items (1) Three Months Ended March 31, 2025 2024 Cost of sales: Restructuring costs, including accelerated depreciation $ (4.1) $ 3.6 Environmental remediation costs (4.9) (4.0) Reimbursement of previously incurred environmental costs 1.3 — Impact on cost of sales (7.7) (0.4) Selling and administrative expense: Restructuring and employee separation costs (5.1) (0.7) Legal and other (0.4) (3.5) Cloud-based enterprise resource planning system impairment (86.3) — Acquisition related costs — (1.6) Impact on selling and administrative expense (91.8) (5.8) Impact on operating income (99.5) (6.2) Interest expense, net - financing costs (1.7) — Impact on (loss) income before income taxes (101.2) (6.2) Income tax benefit on special items 25.5 1.4 Tax adjustments(2) — (0.7) Impact of special items on net (loss) income $ (75.7) $ (5.5) Diluted (loss) earnings per common share impact $ (0.82) $ (0.06) Weighted average shares used to compute adjusted earnings per share: Diluted 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) March 31, 2025 December 31, 2024 ASSETS Current assets: Cash and cash equivalents $ 456.0 $ 544.5 Accounts receivable, net 489.6 399.5 Inventories, net 372.8 346.8 Other current assets 111.9 131.3 Total current assets 1,430.3 1,422.1 Property, net 951.8 955.3 Goodwill 1,684.0 1,659.7 Intangible assets, net 1,464.5 1,450.4 Other non-current assets 280.6 323.6 Total assets $ 5,811.2 $ 5,811.1 LIABILITIES AND SHAREHOLDERS' EQUITY Current liabilities: Short-term and current portion of long-term debt $ 7.8 $ 7.7 Accounts payable 422.2 417.4 Accrued expenses and other current liabilities 268.2 331.0 Total current liabilities 698.2 756.1 Non-current liabilities: Long-term debt 2,061.3 2,059.3 Deferred income taxes 268.0 260.4 Other non-current liabilities 469.3 405.7 Total non-current liabilities 2,798.6 2,725.4 SHAREHOLDERS' EQUITY Avient shareholders’ equity 2,298.3 2,313.8 Noncontrolling interest 16.1 15.8 Total equity 2,314.4 2,329.6 Total liabilities and equity $ 5,811.2 $ 5,811.1 10 Attachment 5 Avient Corporation Condensed Consolidated Statements of Cash Flows (Unaudited) (In millions) Three Months Ended March 31, 2025 2024 Operating activities Net (loss) income $ (19.9) $ 49.7 Adjustments to reconcile net (loss) income to net cash used by operating activities: Depreciation and amortization 45.3 44.3 Cloud-based enterprise resource planning system impairment 71.6 — Share-based compensation expense 2.4 3.3 Changes in assets and liabilities: Increase in accounts receivable (83.7) (81.9) Increase in inventories (20.3) (12.3) (Decrease) increase in accounts payable (1.0) 1.7 Environmental insurance recovery 34.0 — Decrease in incentive accruals (53.1) (16.8) Accrued expenses and other assets and liabilities, net (26.4) (30.8) Net cash used by operating activities (51.1) (42.8) Investing activities Capital expenditures (12.5) (24.4) Proceeds from plant closures — 2.0 Other investing activities — (2.1) Net cash used by investing activities (12.5) (24.5) Financing activities Payments on long-term borrowings — (2.7) Cash dividends paid (24.7) (23.5) Other financing activities (3.6) (1.9) Net cash used by financing activities (28.3) (28.1) Effect of exchange rate changes on cash 3.4 (6.1) Decrease in cash and cash equivalents (88.5) (101.5) Cash and cash equivalents at beginning of year 544.5 545.8 Cash and cash equivalents at end of period $ 456.0 $ 444.3 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.

FIBER + RESIN = COMPOSITE Carbon fiber is formed by bonding carbon atoms together to form a long chain. Filaments can be woven into a fabric, or used in continuous unidirectional form and combined with resin to create a composite.

OnColor™ Naturals is a range of colorants made with natural pigments derived from plants, flowers, roots, and minerals.  Learn more about a range of colorants made with natural pigments derived from plants, flowers, roots and minerals.

You are advised to consult any further disclosures we make on related subjects in our reports on Form 10-Q, 8-K and 10-K that we provide to the Securities and Exchange Commission. S A F E T Y F I R S T PolyOne Corporation 7 Injuries per 100 Workers Spartech Acquisition 1.3 1.1 1.1 0.85 0.65 0.57 0.54 0.97 0.84 0.74 0.74 0.69 0.51 2006 2007 2008 2009 2010 2011 2012 2013 2014 2015 2016 2017 2018 G R E A T P L A C E T O W O R K PolyOne Corporation 8 * Pro Forma for sale of DSS Operating Income % of Sales 2006 Q3 YTD 2019 Color, Additives & Inks 1.7% 15.5% Specialty Engineered Materials 1.1% 11.8% Distribution 2.6% 6.3% 2009 2010 2011 2012 2013 2014 2015 2016*2017* 2018 $2.43 P R O O F O F P E R F O R M A N C E C O N S E C U T I V E Y E A R S PolyOne Corporation 9 10 $0.13 $0.68 $0.82 $1.00 $1.31 $1.80 $1.96 $2.06 $2.21 A D J U S T E D E P S E X P A N S I O N 2018 2019E $1.65 $1.51 Pro Forma for sale of PP&S T R A N S F O R M A T I O N H E A D L I N E S PolyOne Corporation 10 C O M M O D I T Y T O S P E C I A L T Y T R A N S F O R M A T I O N PolyOne Corporation 11 • Volume driven, commodity production • Heavily tied to cyclical end markets • Performance largely dependent on non- controlling joint ventures • Shift to value-based selling & an innovative culture • New leadership team appointed • Implementation of four pillar strategy • Investment in commercial training and innovation • Faster growing, high margin focus • Accelerated growth with world class vitality index • Significant commercial resource additions • Expanded margins with specialty focus • Acquired strategic, bolt-on companies to expand technology offerings and improve geographic breadth Volume Value Transformation The Future 2006 - 2013 2013 – 20192000-2005 2006 - 2013 • Landmark portfolio transformation creates specialty growth company • Sustainability / mega- trends drive above market growth 2020 and Beyond F I T W I T H F O U R P I L L A R S T R A T E G Y PolyOne Corporation 12 Specialization • Innovation-led organization with heavy emphasis on R&D • World-class expertise in color formulation • Strong presence in specialty end markets including Consumer, Packaging and Healthcare Globalization • Diverse geographic portfolio with an established presence in every major region • Expands PolyOne’s ability to serve customers in key growth areas including India, China and Southeast Asia Operational • Extensive manufacturing footprint with 46 facilities • Organizational focus on optimizing supply chain to better serve customers • Color design expertise Commercial • Value-focused salesforce with vast experience marketing and commercializing specialty technologies • Diverse customer portfolio with established OEM’s People Experienced and talented associates with a winning mentality L E V E R A G I N G G L O B A L M E G A T R E N D S 13 Facilitate alternative energy solutions Light- weighting Reduce packaging materials Improve recyclability Reduce spread of infection T R A N S P O R T A T I O N P A C K A G I N G H E A L T H C A R EC O N S U M E R PolyOne Corporation E N D M A R K E T T R A N S F O R M A T I O N PolyOne Corporation 14 Building & Construction 18% 8% 50% 22% High Growth End Markets Percentage of Total Revenue 38% E N D M A R K E T T R A N S F O R M A T I O N PolyOne Corporation 15 8% Building & Construction 38% Wire & Cable 11% Industrial Electrical & Electronic 7% Transportation 18% Building & Construction Wire & Cable Industrial Electrical & Electronic Appliance 3% Textiles Transportation 13% C O M P L E M E N T A R Y G E O G R A P H I C P R E S E N C E PolyOne Corporation 16 38% Europe 33% Asia 19% 22% Europe Asia & Middle East 31% 1% Color & Engineered Materials Clariant Color & Additive Masterbatch Business Net Sales by Geographic Region 31% Europe 36% Asia & Middle East 24% 3% Pro Forma Color & Engineered Materials 531 710 1,042 130 164 208 504 663 880 2014 2018 2019E PF* R&D / Technical Marketing Sales PolyOne Corporation 17 + 34% + 26% + 32% E X P A N S I O N O F COMMERCIAL RESOURCES D R I V I N G G R O W T H $2.9 $2.9 $3.5 2015 2016 2017 2018 2019E PF Total + 9% Organic + 5% Revenue in Billions Total + 10% Organic + 7%+ 47% + 27% + 33% $4.0 $3.2 2019E PF* P R I O R A C Q U I S I T I O N S : P R O O F O F P E R F O R M A N C E PolyOne Corporation 18 Commercial Resources Operating Income ($ in millions) Operating Margins 243 340 $36 $96 11% Established Acquisitions (> 7 years) + 40% + 165% + 900 bps U N I F I E D F O C U S O N S U S T A I N A B I L I T Y PolyOne Corporation 19 2006 - 2013 2013 – 2019 PEOPLE PRODUCTS PLANET PERFORMANCE Clariant Color & Additive Masterbatch Business • Building mini-recycling plants to facilitate customer projects on design for recycling - CycleWorks • Uses packaging additives & colorants to improve recyclability and enhance automated sorting • Manufactures oxygen scavengers to extend shelf-life of perishable items and reduce material requirements • Combines UV-blocking additive colorants & other barriers to prevent spoilage and waste • Offers spin-dyeing solutions that use significantly less water than traditional methods, allowing for sustainable coloration of textiles • Produces infrared absorbing additives that reduce energy requirements for bottle manufacturing ($ in millions) (Continuing Operations) Clariant Color & Additive Masterbatch Business Synergies New 2019E Total Sales $2,860 $1,150 $4,010 2019E Adjusted EBITDA $310 $130 $60 $500 % Margin 10.8% 11.3% 12.5% 2019E CapEx $60 $85 % Sales 2.1% 2.1% 2019E Free Cash Flow $170 $250 2019E Adjusted EPS $1.65 $2.22 2019E PF Adjusted EPS $1.65 $2.50 P O L Y O N E + C L A R I A N T C O L O R & A D D I T I V E M A S T E R B A T C H B U S I N E S S PolyOne Corporation 20 (1) Excludes step-up of depreciation & amortization related to purchase accounting of transaction (1) $0.85/share O V E R 8 5 % O F A D J U S T E D E B I T D A F R O M S P E C I A L T Y PolyOne Corporation 21 46% 66% 0% 60% 80% 100% 2005 2010 2015 2019E PF % o f A d ju s te d E B IT D A * JV's Performance Products & Solutions Distribution Specialty 7% 87% * Adjusted EBITDA is EBITDA excluding corporate costs and special items ** 2019E Pro Forma for PP&S Divestiture and Clariant Color & Additive Masterbatch business acquisition with synergies Specialty EBITDA $14M $117M $273M $500M ** PolyOne Corporation 22 T R A N S A C T I O N O V E R V I E W • Expected mid-2020, subject to regulatory approvals and customary closing conditions Closing Conditions / Timing • Committed financing in place • Permanent financing to be combination of available cash on-hand, new debt and equity component to limit leverage • Equity issuance of $400 to $500MM • Target net leverage below 3.5x, 3.1x synergized, with intention to de-lever below 3.0x within 2 years PolyOne Corporation 23 • $1.45 B net purchase price • Represents 11.1x adjusted EBITDA (excluding synergies), 7.6x adjusted EBITDA (including synergies) • Pre-tax synergies of $60MM expected to be fully realized by the end of 2023 • Synergies realized from sourcing, operational, technology / commercial, and general administrative Transaction Value Synergies Estimated Synergy Breakdown $60MM • Expect EBITDA synergies of $60MM – Proven integration expertise with a decade of acquisition experience – Administrative synergies reflect reduction of duplicative internal and third-party costs • Run rate synergies of $20MM by the end of Year 1 with $60MM achieved by the end of Year 3 • Significant additional opportunity for geographical expansion – Clariant Color & Additive Masterbatch business has complementary regional presence in key growth areas including India & Southeast Asia • Opportunity to accelerate growth with a combined portfolio of innovative solutions aligned with sustainability megatrends Sourcing Operational 30% Administrative 30% PolyOne Corporation 24 S I G N I F I C A N T S Y N E R G Y O P P O R T U N I T I E S C A P I T A L S T R U C T U R E / L E V E R A G E PolyOne Corporation 25 At Close Year 1 Year 2 3.2x 3.5x 3.1x 2.6x Pro Forma with Synergies 2019E PF Two year leverage goal (1) Pro Forma Capitalization is for illustrative purposes only; amounts may vary depending on various market and other factors.

You are advised to consult any further disclosures we make on related subjects in our reports on Form 10-Q, 8-K and 10-K that we provide to the Securities and Exchange Commission. 4 Non-GAAP Financial Measures The Company uses both GAAP (generally accepted accounting principles) and non-GAAP financial measures. Three Months Ended March 31, 2022 Three Months Ended March 31, 2021 Reconciliation to Condensed Consolidated Statements of Income $ EPS $ EPS Net income attributable to Avient shareholders $ 84.2 $ 0.91 $ 79.3 $ 0.86 Special items, after tax (Attachment 3) 7.2 0.08 2.6 0.03 Adjusted net income / EPS - excluding special items $ 91.4 $ 0.99 $ 81.9 $ 0.89 6 Attachment 2 Avient Corporation Condensed Consolidated Statements of Income (Unaudited) (In millions, except per share data) Three Months Ended March 31, 2022 2021 Sales $ 1,293.8 $ 1,162.3 Cost of sales 1,000.1 859.9 Gross margin 293.7 302.4 Selling and administrative expense 165.1 182.0 Operating income 128.6 120.4 Interest expense, net (16.9) (19.3) Other (expense) income, net (0.6) 1.5 Income before income taxes 111.1 102.6 Income taxes (26.6) (22.9) Net income 84.5 79.7 Net income attributable to noncontrolling interests (0.3) (0.4) Net income attributable to Avient shareholders $ 84.2 $ 79.3 Earnings per share attributable to Avient common shareholders - Basic $ 0.92 $ 0.87 Earnings per share attributable to Avient common shareholders - Diluted $ 0.91 $ 0.86 Cash dividends declared per share of common stock $ 0.2375 $ 0.2125 Weighted-average shares used to compute earnings per common share: Basic 91.5 91.3 Diluted 92.3 92.2 7 Attachment 3 Avient Corporation Summary of Special Items (Unaudited) (In millions, except per share data) Special items (1) Three Months Ended March 31, 2022 2021 Cost of sales: Restructuring costs, including accelerated depreciation and amortization $ (4.4) $ (1.8) Environmental remediation costs (2.0) (0.5) Reimbursement of previously incurred environmental costs 0.6 4.5 Impact on cost of sales (5.8) 2.2 Selling and administrative expense: Restructuring, legal and other 0.9 (1.3) Acquisition related costs (2.9) (3.3) Impact on selling and administrative expense (2.0) (4.6) Impact on operating income (7.8) (2.4) Other income, net 0.1 — Impact on income before income taxes (7.7) (2.4) Income tax benefit on above special items 2.0 0.9 Tax adjustments(2) (1.5) (1.1) Impact of special items on net income attributable to Avient Shareholders $ (7.2) $ (2.6) Diluted earnings per common share impact $ (0.08) $ (0.03) Weighted average shares used to compute adjusted earnings per share: Diluted 92.3 92.2 (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

Engage in the development and use of climate friendly products and processes to reduce power consumption and greenhouse gas emissions

Engage in the development and use of climate friendly products and processes to reduce power consumption and greenhouse gas emissions

FLEXCART™ NANO METERING SYSTEM The FlexCart Nano system is the smallest version of the FlexCart systems, providing a compact metering unit suited for very short production runs and small laboratory/pilot plant systems.

We follow the solution from our design centers to your plant, supporting development trials and scale up, and troubleshooting production issues as they arise.

LOOKING AT RECYCLING THROUGH THE LENS OF SCIENCE The CycleWorks Innovation Center is a fully functioning recycling mini plant in Milan, Italy.