Additionally, Adjusted EPS excludes the impact of special items and amortization expense associated with intangible assets. 2 O P E N I N G RE MARK S B O B P A T T E R S O N C H A I R M A N , P R E S I D E N T A N D C E O Complementary technologies and customer relationships offer opportunity to advance commercial strategy Dyneema®, the world’s strongest fiber™, to accelerate growth of sustainable, ultralight and high performance applications AVIENT PROTECTIVE MATERIALS FIRST YEAR 4 Composites comprises over half of Specialty Engineered Materials, compared to 9% in 2016 Proven history of success in areas such as outdoor high performance, defense and sustainable solutions Composites 44% 56% 2023E Sales Collaboration & InnovationComposites as a % of SEM People & Culture Talented, passionate, and creative associates drive continued integration success and allow two cultures to come together as one Avient Lightweight Protective Laminates: PROJECTILE PROTECTION Dyneema® Fiber Solutions Cushioning + Fit + Comfort: LONG-TERM WEAR reSound™ Versaflex™ Thermoplastic Elastomers Strength + Durability + Light-Weighting: SOLID MOUNTING BRACKETS Nymax™ Bergamid™ Complēt™ Engineered Materials Durability + Lubricity: HELMET LATCHES Lubri-One™ Internally Lubricated Polymers Color Consistency and Weatherability CUSTOMIZED SPECIFICATIONS Avient Color and Additive Solutions Antennae Performance FAST, RELIABLE CONNECTIONS PREPERM™ Low-Loss Dielectric Thermoplastics AVIENT PROTECTIVE MATERIALS CROSS SELLING OPPORTUNITIES Wired Connections CONSTANT COMMUNICATION Syncure™ Cross-linkable Wire & Cable Formulations5 6 AVIENT PROTECTIVE MATERIALS CROSS SELLING OPPORTUNITIES 6 Q 3 P E RFO RMAN CE 15.4% 16.3% 2022 PF 2023 Results vs.

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. In addition, a recording of the audio will be available for one week, beginning at 12:00 p.m. 2) Tax adjustments include the net tax benefit/(expense) from one-time income tax items, the set-up or reversal of uncertain tax position reserves and deferred income tax valuation allowance adjustments. 9 Attachment 4 Condensed Consolidated Balance Sheets (Unaudited) March 31, 2021 2020 ASSETS Current assets: Cash and cash equivalents $ 594.5 $ 649.5 Accounts receivable, net 642.2 516.6 Inventories, net 357.0 327.5 Other current assets 122.7 108.5 Total current assets 1,716.4 1,602.1 Property, net 675.5 694.9 Goodwill 1,281.9 1,308.1 Intangible assets, net 973.3 1,008.5 Operating lease assets, net 80.9 80.9 Other non-current assets 181.4 176.0 Total assets $ 4,909.4 $ 4,870.5 LIABILITIES AND SHAREHOLDERS' EQUITY Current liabilities: Short-term and current portion of long-term debt $ 18.8 $ 18.6 Accounts payable 529.6 471.7 Current operating lease obligations 24.3 25.1 Accrued expenses and other current liabilities 290.9 285.6 Total current liabilities 863.6 801.0 Non-current liabilities: Long-term debt 1,852.7 1,854.0 Pension and other post-retirement benefits 111.3 115.0 Non-current operating lease obligations 56.8 56.0 Other non-current liabilities 303.0 332.8 Total non-current liabilities 2,323.8 2,357.8 SHAREHOLDERS' EQUITY Avient shareholders’ equity 1,707.0 1,697.1 Noncontrolling interest 15.0 14.6 Total equity 1,722.0 1,711.7 Total liabilities and equity $ 4,909.4 $ 4,870.5 10 Attachment 5 Condensed Consolidated Statements of Cash Flows (Unaudited) March 31, 2021 2020 Operating Activities Net income $ 79.7 $ 32.8 Adjustments to reconcile net income to net cash provided by operating activities: Depreciation and amortization 36.6 19.9 Accelerated depreciation and amortization 0.5 — Share-based compensation expense 2.7 2.1 Changes in assets and liabilities, net of the effect of acquisitions: Increase in accounts receivable (137.6) (56.9) Increase in inventories (35.1) (13.0) Increase in accounts payable 67.3 44.6 Decrease in pension and other post-retirement benefits (7.1) (3.2) Increase in post-acquisition earnout liabilities — 1.0 Decrease in accrued expenses and other assets and liabilities, net (3.4) (19.1) Payment of post-acquisition date earnout liability — (21.0) Net cash provided (used) by operating activities 3.6 (12.8) Investing activities Capital expenditures (16.5) (11.1) Net proceeds from divestiture — 7.1 Net proceeds (used) provided by other assets (2.0) 5.2 Net cash (used) provided by investing activities (18.5) 1.2 Financing activities Purchase of common shares for treasury (4.2) (13.6) Cash dividends paid (19.5) (15.6) Repayment of long-term debt (2.3) (2.0) Payments of withholding tax on share awards (3.1) (1.3) Equity offering proceeds, net of underwriting discount and issuance costs — 496.3 Payment of acquisition date earnout liability — (32.9) Net cash (used) provided by financing activities (29.1) 430.9 Effect of exchange rate changes on cash (11.0) (3.8) (Decrease) increase in cash and cash equivalents (55.0) 415.5 Cash and cash equivalents at beginning of year 649.5 864.7 Cash and cash equivalents at end of period $ 594.5 $ 1,280.2 11 Attachment 6 Business Segment Operations (Unaudited) 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.

PDI has extensive experience with the testing of medical devices and materials including: • Catheters • Bio-implants • Surgical diagnostic devices • Medical tubing • Other disposable medical devices Issues often arise as a result of: • Improper design or choice of material • The environment of exposure • Processing conditions World-class people and capabilities under one roof • Failure Analysis/Prevention • Qualifi cation Support • Rheology • Polymer Characterization • Deformulation • Physical Testing • Litigation Support • Characterization of polymers in pharmaceutical delivery systems • Phthalate and BPA testing C M Y K HC_Industry bulletin_PDI_fi nal.indd REMAY 78810 TR: 16.5000" x 11.6875" and 17.000" x 11.000" Digital/IAM BL: 17.2500" x 11.9375" FINAL: 8.2500" x 11.6875" and 8.500" x 11.000" i n Polymer Diagnostics Inc. PDI has extensive experience with the testing of medical devices and materials including: • Catheters • Bio-implants • Surgical diagnostic devices • Medical tubing • Other disposable medical devices Issues often arise as a result of: • Improper design or choice of material • The environment of exposure • Processing conditions World-class people and capabilities under one roof • Failure Analysis/Prevention • Qualifi cation Support • Rheology • Polymer Characterization • Deformulation • Physical Testing • Litigation Support • Characterization of polymers in pharmaceutical delivery systems • Phthalate and BPA testing C M Y K HC_Industry bulletin_PDI_fi nal.indd REMAY 78810 TR: 16.5000" x 11.6875" and 17.000" x 11.000" Digital/IAM BL: 17.2500" x 11.9375" FINAL: 8.2500" x 11.6875" and 8.500" x 11.000" i n www.polymerdiagnostics.com Industr y Bul let in Comprehensive consulting and testing expertise for medical materials and device companies Committed to Growing with the Medical Industry Since 2009, PDI has invested over $2 million to improve and extend our capabilities to serve our medical materials and device clients.

Highly flame retardant—helps to prevent a fire, or limit the damage if one starts • Non-halogenated—in the case of a fire, there are no acid gas emissions which can damage equipment and buildings • Low smoke—in the event of fire, people can locate escape routes, and fire fighters can quickly find the source of the fire • Low toxicity—in the event of a fire, people are not overcome by toxic fumes • Low dripping—no flaming droplets which can further propagate the fire or cause injury • Low emission of corrosive gases when burned—avoids potential damage to electrical components and equipment, and improves human safety MARKETS AND APPLICATIONS The ECCOH XL 8001 is a flame retardant material for thermoset cable insulation.

Our application development, engineering and industrial design teams can help you to: • Increase stiffness • Improve impact resistance • Reduce weight through thin-walling and material reduction or replacement • Add strength in high stress areas Avient’s thermoplastic composite innovation cell in Englewood, CO features injection and compression molding equipment as well as design and testing services, all under one roof.

Thanks to the customized Gravi-Tech material, API was able to successfully design and mold a flapper valve that is the only one of its kind on the market—and offers a less expensive solution than traditional brass valves.

THE IMPORTANCE OF PLASTICS FOR PACKAGING Compared to alternative materials, plastic is one of the most sustainable materials available for packaging applications.

Beyond transportation, cars continuously transform industries, economies, and social dynamics, influencing the way we live, work, and interact with one another.

long-term light stabilization additive and custom color in one pellet.

OnColor™ UL 94 Colorants* • More than 2,000 recognized concentrates available worldwide in all color options • HB rating for most of PP, PS, ABS, PC/ABS, PBT, PA, PA-GF, TPU generic resins • V-0, V-1, V-2 and 5VA/5VB ratings for more than 200 specific engineering resins • Master file of recognized concentrates with scope of use accessible in the UL product finder • Development of custom products for specific resins upon request • Compliance Letters available for REACH and RoHS Cesa™ Flame Retardant Additives for Glow Wire • Fire performance in line with different levels of Glow Wire temperatures (IEC 60695-2-12) • Let-Down Ratio adjustable to reach different levels of Glow Wire temperatures • Non-halogen (in accordance with IEC 61249- 2-21) and non-HBCD** solutions • Wide range of solutions adapted to different polymers (PP, PS, PC) • Color and flame retardants can be combined in one product • Compliance Letters available for REACH and RoHS APPLICATION BULLETIN * Solutions also sold as Renol™ UL 94 Colorants APPLICATION POLYMER GWFI TEMPERATURE TYPICAL LET-DOWN RATIO CONTENT HIPS 750–960°C 5–10% Non-HBCD flame retardant** PC 850–960°C 2–4% Non-halogen in accordance with IEC 61249-2-21 PP homopolymer 850–960°C 4% Non-halogen in accordance with IEC 61249-2-21 PP copolymer 850–960°C 4–8% Antioxidant - metal deactivator ** Non-HBCD means that Hexabromocyclododecane (HBCD) is neither used as starting material during the mixing phase of our products nor intentionally added during production, but it cannot be excluded that it is not present at level of ubiquitous traces in any of the raw materials used in manufacturing of our products.