Adjusted EPS attributable to PolyOne common shareholders is calculated as follows: 2009* 2010 2011 2012 2013 2014 2015 2016 Net income attributable to PolyOne common shareholders $ 106.7 $ 152.5 $ 153.4 $ 53.3 $ 94.0 $ 78.0 $ 144.6 $ 165.2 Joint venture equity earnings, after tax (19.0) (14.7) (3.7) — — — — — Special items, before tax(1) (48.7) 24.2 (48.1) 55.1 46.3 164.2 87.6 35.5 Special items, tax adjustments(1) (27.2) (96.7) (24.7) (18.9) (13.7) (73.7) (58.7) (20.7) Adjusted net income attributable to PolyOne common shareholders $ 11.8 $ 65.3 $ 76.9 $ 89.5 $ 126.6 $ 168.5 $ 173.5 $ 180.0 Diluted shares 93.4 96.0 94.3 89.8 96.5 93.5 88.7 84.6 Adjusted EPS attributable to PolyOne common shareholders $ 0.13 $ 0.68 $ 0.82 $ 1.00 $ 1.31 $ 1.80 $ 1.96 $ 2.13 Adjusted operating income is calculated as follows: 2006* 2016 Operating income $ 233.6 $ 281.9 Special items (1) (39.1) 35.3 Joint venture equity earnings (107.0) 0.0 Adjusted operating income $ 87.5 $ 317.2 * Historical results are shown as presented in prior filings and have not been updated to reflect subsequent changes in accounting principle, discontinued operations or the related resegmentation. (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; 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; the effect of changes in accounting principles or other such laws or provisions affecting reported results and tax adjustments. Tax adjustments include the net tax expense/benefit from one-time income tax items, the set-up or reversal of uncertain tax position reserves and deferred income tax valuation allowance adjustments. Segment Highlights At a Glance: Color, Additives & Inks At a Glance: Specialty Engineered Materials At a Glance: Designed Structures & Solutions At a Glance: Performance Products & Solutions At a Glance: Distribution Target End Markets &�Application Examples Slide Number 21 Slide Number 22 Slide Number 23 Slide Number 24 Luxury Packaging�with Gravitech Density Modified Polymers Optimize Color Usage�with OnColor Super Concentrates Combat Bacteria Formation�with WithStand Antimicrobial Technology Medical Device Housings�with Chemically Resistant Engineered Polymers Color & Design Services Outdoor Applications Fiber Colorants�Solutions for clothing, apparel, footwear, automotive & sporting goods High-Barrier Packaging Containers Smart Home Devices�with Resilience Vinyl Solutions Investor Presentation Non-GAAP Rec - May 2017 r2 Investor Presentation - May 2017

The company noted that GAAP EPS includes special items of $0.29 (Attachment 3) primarily associated with one-time tax benefits of $0.35, which was partially offset by acquisition-related and restructuring costs. In addition, a recording of the audio will be available for one week, beginning at 12:00 p.m. Three Months Ended December 31, Year Ended December 31, 2020 2019 2020 2019 Sales: Color, Additives and Inks $ 525.8 $ 226.7 $ 1,502.9 $ 1,003.8 Specialty Engineered Materials 190.6 177.5 708.8 745.7 Distribution 305.1 272.4 1,110.3 1,192.2 Corporate and eliminations (24.5) (18.0) (79.9) (79.0) Sales $ 997.0 $ 658.6 $ 3,242.1 $ 2,862.7 Gross margin: Color, Additives and Inks $ 164.3 $ 73.9 $ 484.4 $ 338.4 Specialty Engineered Materials 59.1 47.7 207.6 200.2 Distribution 32.4 31.0 124.0 132.1 Corporate and eliminations (2.9) 0.7 (31.7) (13.5) Gross margin $ 252.9 $ 153.3 $ 784.3 $ 657.2 Selling and administrative expense: Color, Additives and Inks $ 106.8 $ 46.7 $ 303.6 $ 191.0 Specialty Engineered Materials 28.7 28.9 113.2 116.5 Distribution 14.4 14.0 54.5 56.7 Corporate and eliminations 38.0 43.2 123.7 136.2 Selling and administrative expense $ 187.9 $ 132.8 $ 595.0 $ 500.4 Operating income: Color, Additives and Inks $ 57.5 $ 27.2 $ 180.8 $ 147.4 Specialty Engineered Materials 30.4 18.8 94.4 83.7 Distribution 18.0 17.0 69.5 75.4 Corporate and eliminations (40.9) (42.5) (155.4) (149.7) Operating income $ 65.0 $ 20.5 $ 189.3 $ 156.8 11 Attachment 7 Avient Corporation Reconciliation of Non-GAAP Financial Measures (Unaudited) (In millions, except per share data) Senior management uses gross margin before special items and operating income before special items to assess performance and allocate resources because senior management believes that these measures are useful in understanding current profitability levels and how it may serve as a basis for future performance.

POLYSTRAND™ THERMOPLASTIC COMPOSITE PANELS APPLICATION & INSTALLATION GUIDE PRODUCT DESCRIPTION FEATURE BENEFIT Exceptional strength-to-weight ratio Lightweight yet strong structural performance and increased payloads Resistance to UV light, chemicals, moisture degradation and rot Withstands harsh conditions Tough and impact resistant Durability and long product life Dimensionally stable Consistent performance in extreme temperature and humidity fluctuations Strong adhesive properties Easy bonding to various materials FEATURE BENEFIT Ready-to-install Fewer parts & reduced scrap Large format Improved aesthetics with seamless designs Made via continuous-fiber manufacturing process Consistent quality in every panel PERFORMANCE ADVANTAGES MANUFACTURING ADVANTAGES Polystrand™ Thermoplastic Composite Panels are engineered to provide simplified installation, long-lasting components, and overall cost reduction. GL AS S/ EP OX Y TA B M AT ER IA L N O T AB BOTTOM PANEL LEG LENGTH BREAK STRENGTH Hammerhead with 5 lb/ft3 (80 kg/m3) Core Density 2 in 51 mm 420 lbs 191 kg Hammerhead with 7 lb/ft3 (115 kg/m3) Core Density 2 in 51 mm 370 lbs 168 kg Hammerhead with 8 lb/ft3 (135 kg/m3) Core Density 2 in 51 mm 332 lbs 151 kg Marine Plywood 2 in 51 mm 984 lbs 446 kg Glass/Polyester with Balsa Core 2 in 51 mm 1298 lbs 589 kg Hammerhead with 5 lb/ft3 (80 kg/m3) Core Density - ITW Plexus MA420 Adhesive NA 501 lbs 227 kg Hammerhead with 7 lb/ft3 (115 kg/m3) Core Density - ITW Plexus MA420 Adhesive NA 839 lbs 381 kg Hammerhead with 8 lb/ft3 (135 kg/m3) Core Density - ITW Plexus MA420 Adhesive NA 1156 lbs 524 kg Hammerhead with 8 lb/ft3 (135 kg/m3) Core Density - Crestomer 1152PA Adhesive NA 1530 lbs 694 kg Hammerhead with 8 lb/in3 (135 kg/m3) Core Density - Crestomer M1-30 Adhesive NA 1471 lbs 667 kg Mixed Conditions ADHESIVE DESCRIPTION ADHESIVE GRADE MANUFACTURER AVERAGE BOND STRENGTH STANDARD DEVIATION FAILURE MODE BEST ADHESION 2k Urethane 75421 LORD 2281 psi 15.73 MPa 184 psi 1.27 MPa Substrate Cohesive 2k Acrylic SA1-705 GRY1 ACRALOCK 2211 psi 15.24 MPa 78 psi 0.54 MPa Substrate 2k Acrylic Plexus MA420 ITW 2171 psi 14.97 MPa 262 psi 1.81 MPa Substrate 2k Acrylic SA10-05 Blk1 ACRALOCK 2102 psi 14.49 MPa 138 psi 0.95 MPa Substrate 2k Urethane 75451 LORD 2047 psi 14.11 MPa 68 psi 0.47 MPa Cohesive 2k Acrylic SA1-705 GRY 1:1 ACRALOCK 1966 psi 13.56 MPa 68 psi 0.47 MPa Substrate 2k Acrylic Scotch-Weld 8010 3M 1907 psi 13.15 MPa 61 psi 0.42 MPa Adhesive Cyanoacrylate Gorilla Glue Gorilla Glue 1885 psi 13.00 MPa 432 psi 2.98 MPa Cohesive 2k Acrylic Crestabond PP-04 Scott Bader 1873 psi 12.91 MPa 281 psi 1.94 MPa Substrate 2k Acrylic SA10-05 Blk 10:1 ACRALOCK 1779 psi 12.27 MPa 127 psi 0.88 MPa Cohesive 2k Urethane 75422 LORD 1716 psi 11.83 MPa 190 psi 1.31 MPa Cohesive Adhesive 2k Urethane 75452 LORD 1535 psi 10.58 MPa 98 psi 0.68 MPa Adhesive 2k Methacrylate PolyFuse Icon Containment 1610 psi 11.10 MPa 98 psi 0.68 MPa Adhesive INTERMEDIATE ADHESION 2k Acrylic FA10-05 Blk C010817 ACRALOCK 724 psi 4.99 MPa 58 psi 0.40 MPa Cohesive 2k Acrylic FA10-05 Blk1 ACRALOCK 722 psi 4.98 MPa 44 psi 0.30 MPa Cohesive 2k Epoxy Loctite Epoxy Instant Mix Loctite 508 psi 3.50 MPa 81 psi 0.56 MPa Adhesive 2k Epoxy Gorilla Epoxy Gorilla Glue 341 psi 2.35 MPa 198 psi 1.37 MPa Adhesive NOT RECOMMENDED 2k Epoxy Loctite Epoxy Marine Loctite 0 0 No bond ADHESIVE SELECTION Brand names of the adhesives are owned by the respective manufacturers. FASTENER TYPE BENEFITS CONSIDERATIONS FOAM HONEY COMB Through- bolting Best mechanical locking system Need back side access to panel ✓ ✓ Wide Grip (Bulb-Style) Rivet Highest pullout strengths Requires pilot hole ✓ Cup Washer Spreads compressive load Requires relief hole; for substructure and hard point attachment ✓ ✓ Wide Grip (Bulb-Style) Rivet Ease of use— no installation torque limitations For lower load attachments ✓ Sheet Metal or Wood Screw Readily available, low cost Penetrate both skins for improved pullout ✓ Shoulder Washer Limits compressive load Requires relief hole; for substructure and hard point attachment ✓ ✓ FASTENER SELECTION Copyright © 2023, Avient Corporation.

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   Avoid over-engineering – The new connector must be designed to meet the targeted requirements accurately, without over engineering, thus avoiding the costs of higher-than-needed performance levels. Because they knew Avient could help, the connector company’s design engineers invited Avient into the development process. Working closely with the manufacturer’s engineers, Avient determined that the material required a special combination of properties:

A recording of the webcast and the slide presentation will be available at avient.com/investors/events-presentations immediately following the conference call and will be accessible for one year. Three Months Ended March 31, 2023 Three Months Ended March 31, 2022 Reconciliation to Condensed Consolidated Statements of Income $ EPS $ EPS Net income from continuing operations attributable to Avient shareholders $ 20.8 $ 0.23 $ 64.4 $ 0.70 Special items, after tax (Attachment 3) 22.3 0.24 6.4 0.07 Amortization expense, after-tax 15.1 0.16 10.8 0.12 Adjusted net income / EPS $ 58.2 $ 0.63 $ 81.6 $ 0.89 8 Attachment 2 Avient Corporation Condensed Consolidated Statements of Income (Unaudited) (In millions, except per share data) Three Months Ended March 31, 2023 2022 Sales $ 845.7 $ 892.2 Cost of sales 598.1 637.8 Gross margin 247.6 254.4 Selling and administrative expense 190.5 152.2 Operating income 57.1 102.2 Interest expense, net (28.8) (16.9) Other income (expense), net 0.7 (0.6) Income from continuing operations before income taxes 29.0 84.7 Income tax expense (7.7) (20.0) Net income from continuing operations 21.3 64.7 (Loss) income from discontinued operations, net of income taxes (0.9) 19.8 Net income 20.4 84.5 Net income attributable to noncontrolling interests (0.5) (0.3) Net income attributable to Avient common shareholders $ 19.9 $ 84.2 Earnings (loss) per share attributable to Avient common shareholders - Basic: Continuing operations $ 0.23 $ 0.70 Discontinued operations (0.01) 0.22 Total $ 0.22 $ 0.92 Earnings (loss) per share attributable to Avient common shareholders - Diluted: Continuing operations $ 0.23 $ 0.70 Discontinued operations (0.01) 0.21 Total $ 0.22 $ 0.91 Cash dividends declared per share of common stock $ 0.2475 $ 0.2375 Weighted-average shares used to compute earnings per common share: Basic 91.0 91.5 Diluted 91.8 92.3 9 Attachment 3 Avient Corporation Summary of Special Items (Unaudited) (In millions, except per share data) Special items (1) Three Months Ended March 31, 2023 2022 Cost of sales: Restructuring costs, including accelerated depreciation $ (6.6) $ (4.4) Environmental remediation costs (1.4) (2.0) Reimbursement of previously incurred environmental costs — 0.6 Impact on cost of sales (8.0) (5.8) Selling and administrative expense: Restructuring, legal and other (15.7) 1.9 Acquisition related costs (3.4) (2.9) Impact on selling and administrative expense (19.1) (1.0) Impact on operating income (27.1) (6.8) Other income (loss), net (0.2) 0.1 Impact on income from continuing operations before income taxes (27.3) (6.7) Income tax expense (benefit) on above special items 6.9 1.8 Tax adjustments(2) (1.9) (1.5) Impact of special items on net income from continuing operations $ (22.3) $ (6.4) Diluted earnings per common share impact $ (0.24) $ (0.07) Weighted average shares used to compute adjusted earnings per share: Diluted 91.8 92.3 (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, 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, adjustments to uncertain tax position reserves and changes to valuation allowances. 10 Attachment 4 Avient Corporation Condensed Consolidated Balance Sheets (In millions) (Unaudited) March 31, 2023 December 31, 2022 ASSETS Current assets: Cash and cash equivalents $ 582.7 $ 641.1 Accounts receivable, net 484.4 440.6 Inventories, net 371.9 372.7 Other current assets 125.3 115.3 Total current assets 1,564.3 1,569.7 Property, net 1,045.7 1,049.2 Goodwill 1,689.7 1,671.9 Intangible assets, net 1,601.7 1,597.6 Other non-current assets 209.8 196.6 Total assets $ 6,111.2 $ 6,085.0 LIABILITIES AND SHAREHOLDERS' EQUITY Current liabilities: Short-term debt $ 2.2 $ 2.2 Accounts payable 448.1 454.4 Accrued expenses and other current liabilities 386.9 412.8 Total current liabilities 837.2 869.4 Non-current liabilities: Long-term debt 2,177.7 2,176.7 Pension and other post-retirement benefits 66.2 67.2 Deferred income taxes 332.5 342.5 Other non-current liabilities 329.0 276.4 Total non-current liabilities 2,905.4 2,862.8 SHAREHOLDERS' EQUITY Avient shareholders’ equity 2,349.8 2,334.5 Noncontrolling interest 18.8 18.3 Total equity 2,368.6 2,352.8 Total liabilities and equity $ 6,111.2 $ 6,085.0 11 Attachment 5 Avient Corporation Condensed Consolidated Statements of Cash Flows (Unaudited) (In millions) Three Months Ended March 31, 2023 2022 Operating Activities Net income $ 20.4 $ 84.5 Adjustments to reconcile net income to net cash provided by operating activities: Depreciation and amortization 48.7 35.7 Accelerated depreciation 1.8 2.1 Share-based compensation expense 3.2 3.2 Changes in assets and liabilities, net of the effect of acquisitions: Increase in accounts receivable (40.2) (118.8) Decrease (increase) in inventories 3.8 (15.1) (Decrease) increase in accounts payable (9.9) 90.5 Accrued expenses and other assets and liabilities, net (50.0) (63.2) Net cash (used) provided by operating activities (22.2) 18.9 Investing activities Capital expenditures (20.3) (13.3) Net proceeds from divestiture 7.3 — Net cash used by investing activities (13.0) (13.3) Financing activities Purchase of common shares for treasury — (15.8) Cash dividends paid (22.5) (21.7) Repayment of long-term debt (0.8) (2.4) Other financing (2.3) (3.9) Net cash used by financing activities (25.6) (43.8) Effect of exchange rate changes on cash 2.4 (0.4) Decrease in cash and cash equivalents (58.4) (38.6) Cash and cash equivalents at beginning of year 641.1 601.2 Cash and cash equivalents at end of period $ 582.7 $ 562.6 12 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. Three Months Ended March 31, 2023 2022 Sales: Color, Additives and Inks $ 537.0 $ 649.5 Specialty Engineered Materials 309.7 243.1 Corporate (1.0) (0.4) Sales $ 845.7 $ 892.2 Gross margin: Color, Additives and Inks $ 162.0 $ 192.1 Specialty Engineered Materials 93.9 68.4 Corporate (8.3) (6.1) Gross margin $ 247.6 $ 254.4 Selling and administrative expense: Color, Additives and Inks $ 96.4 $ 97.6 Specialty Engineered Materials 50.8 30.1 Corporate 43.3 24.5 Selling and administrative expense $ 190.5 $ 152.2 Operating income: Color, Additives and Inks $ 65.6 $ 94.5 Specialty Engineered Materials 43.1 38.3 Corporate (51.6) (30.6) Operating income $ 57.1 $ 102.2 Depreciation & amortization: Color, Additives and Inks $ 25.8 $ 26.0 Specialty Engineered Materials 21.2 7.8 Corporate 3.5 3.8 Depreciation & Amortization $ 50.5 $ 37.6 Earnings before interest, taxes, depreciation and amortization (EBITDA): Color, Additives and Inks $ 91.4 $ 120.5 Specialty Engineered Materials 64.3 46.1 Corporate (48.1) (26.8) Other income (expense), net 0.7 (0.6) EBITDA $ 108.3 $ 139.2 13 Attachment 7 Avient Corporation Reconciliation of Non-GAAP Financial Measures (Unaudited) (In millions, except per share data) Senior management uses gross margin before special items and operating income before special items to assess performance and allocate resources because senior management believes that these measures are useful in understanding current profitability levels and how it may serve as a basis for future performance.

ELECTRICAL APPLIANCE BRAND H O U S E H O L D P R O D U C T S I N R E C Y C L E D A B S A N D P S • Support to qualify a new raw material sourcing process • Color prediction feasibility for new material grades • Color design guidance to maintain brand identity and differentiation • Color solutions that work with mixed grades of rABS and recycled polystyrene • Worked with the brand owner to test multiple styrenic grades and understand the best fit across colors and recycled resins • Supported integration of multiple resin solutions for the best rendering and aesthetics in rABS and rPS • Helped approve 7 colors to be launched within the forthcoming 18 months PCR Color Prediction Service KEY REQUIREMENTS WHY AVIENT?

This is a direct result of the investments we have made to transform our portfolio to one that is more specialized and focused on high growth end markets with sustainable solutions,” said Robert M. The Specialty Engineered Materials segment also achieved its highest-ever quarterly operating income at $34 million, a 53% increase over the prior year. In addition, a recording of the audio will be available for one week, beginning at 12:00 p.m.

Glass fiber reinforced polymer (GFRP) dowel bars offer advantages over traditional steel or epoxy- coated steel bars: • Electromagnetic transparency: ideal for high- speed toll roads to prevent interference • Corrosion resistance: the GFRP material will not rust or corrode in salt or alkaline environments • Light weight: less than one-third the weight of steel • Does not bond to concrete: eliminates the need for sleeves or grease to allow for expansion and contraction Glasforms™ composite dowel bars are tested and approved to meet the following requirements: • ASTM 1356 Glass Transition Temperature • ASTM D570 Water Absorption • ASTM 2344 Short Beam Strength • ASTM 7617 Transverse Shear Strength Glasforms™ Composite Dowel Bars for Concrete Pavement Construction APPLICATION OVERVIEW WHY GLASFORMS PULTRUDED COMPOSITES? Glasforms is one of the world’s most respected brands in pultruded fiber reinforced polymers (FRP) and advanced composites. Our manufacturing capabilities and collaborative solutions- based technical services have been trusted for decades to create specialized and purpose-engineered composite rods, tubes, and custom shapes.

We collaborate with engineers, project managers and designers to assist you in achieving comprehensive device performance.  Array of engineering polymers and functional enhancements to meet complex performance demands Pre-Colored Specialty Engineered Formulations