Senior management believes these measures are useful to investors because they allow for comparison to Avient's performance in prior periods without the effect of items that, by their nature, tend to obscure Avient's operating results due to the potential variability across periods based on timing, frequency and magnitude. In addition, operating income before the effect of special items is a component of Avient annual and long-term employee incentive plans and is used in debt covenant computations. Senior management believes these measures are useful to investors because they allow for comparison to Avient's performance in prior periods without the effect of items that, by their nature, tend to obscure Avient's operating results due to the potential variability across periods based on timing, frequency and magnitude.

Without giving effect to any impacts from the pending acquisition of Dyneema and potential sale of Avient Distribution, the company provided third quarter adjusted EPS guidance of $0.80, a 14% increase from the prior year quarter, and maintained its full year adjusted EPS guidance of $3.50. Senior management believes these measures are useful to investors because they allow for comparison to Avient's performance in prior periods without the effect of items that, by their nature, tend to obscure Avient's operating results due to the potential variability across periods based on timing, frequency and magnitude. In addition, operating income before the effect of special items is a component of Avient annual and long-term employee incentive plans and is used in debt covenant computations.

Senior management believes these measures are useful to investors because they allow for comparison to Avient's performance in prior periods without the effect of items that, by their nature, tend to obscure Avient's operating results due to the potential variability across periods based on timing, frequency and magnitude. In addition, operating income before the effect of special items is a component of Avient annual and long-term employee incentive plans and is used in debt covenant computations. Senior management believes these measures are useful to investors because they allow for comparison to Avient's performance in prior periods without the effect of items that, by their nature, tend to obscure Avient's operating results due to the potential variability across periods based on timing, frequency and magnitude.

Leadership, EHS&S-PS, Facility Services, Design & Development, Information Technology, Sourcing, Logistics, Legal, and Human Resources Certificate No: 65537 Certification Date: 29 SEP 2023 Effective Date: 27 FEB 2025 Expiration Date: 27 SEP 2026 Revision Date: 05 MAR 2025 Dominic Townsend, PresidentDominic Townsend, President Copyright as of the Effective Date, ABS Quality Evaluations, Inc. No:8 , 34538 Esenyurt, Türkiye Avient Corporation Design and Manufacture of Colorants and Additives for Plastics No. 8 Third Chin Bee Road, Jurong Industrial Estate Singapore 618684 Avient Corporation Design & Manufacture of Color, Additive Concentrate & Specialty Compounds Kalol Works, Shed No.18-22, GIDC Estate Kalol Gujarat 389330 India Copyright as of the Effective Date, ABS Quality Evaluations, Inc. Toluca 2000 Toluca Estado de México 50200 Mexico ISO 14001:2015ISO 14001:2015 Certificate Of ConformanceCertificate Of Conformance ANNEXANNEX Certificate No: 65537 Avient CorporationAvient Corporation At the below facilities FACILITY NAMEFACILITY NAME FACILITY ACTIVITYFACILITY ACTIVITY ADDRESSADDRESS Copyright as of the Effective Date, ABS Quality Evaluations, Inc.

COLORANTS & ADDITIVES FOR HEALTHCARE Essential polymer solutions for critical healthcare applications WHEN MATERIAL EXPERTISE IS CRITICAL AESTHETIC APPEAL Regulatory compliant and approved masterbatch colors use custom polymer colorants to achieve any shade SPECIAL EFFECTS Enhance your brand and stand apart with pearlescent, metallic, iridescent, fluorescent or thermo-chromatic effects SOLID TO LIQUID SOLUTIONS Choose from a full range of available color solutions, from liquid color to solid product forms ANTIMICROBIALS Efficacy performance and regulatory requirements are met in a wide range of resins compatible with Withstand™ antimicrobial technology SURFACE ENERGY MODIFICATION Additive technologies such as low retention, hydrophobic, lubricious, light diffusion, or anti-stat provide desired surface manipulation Materials used for today’s medical devices, parts and pharmaceutical packaging contribute significantly to performance and, in turn, to a patient’s health and well-being. Customize and optimize into a practical, cost effective solution to simplify ordering, processing, inventory control, and delivery. 1.844.4AVIENT www.avient.com Copyright © 2020, Avient Corporation.

APPLICATION BULLETIN Resilience™ HC for Medical Device Housings Offering Improved Resistance to Hospital Disinfectants EFFECT ON POLYMER HOUSINGS FOR MEDICAL DEVICES Unfortunately, the increased disinfection practices among healthcare providers have another effect. RESILIENCE™ HC OUTPERFORMS COMPETING POLYMERS Design engineers are increasingly looking more frequently for better chemical resistance properties in rigid device housings to combat the effects of disinfectants.

Forty percent of our workforce is now trained in these effective lean principles dollars at the exchange rates in effect at the balance sheet date. Management has assessed the effectiveness of PolyOne’s internal control over financial reporting as of December 31, 2011 and has concluded that such internal control over financial reporting is effective.

Senior management believes these measures are useful to investors because they allow for comparison to Avient's performance in prior periods without the effect of items that, by their nature, tend to obscure Avient's operating results due to the potential variability across periods based on timing, frequency and magnitude. In addition, operating income before the effect of special items is a component of Avient annual and long-term employee incentive plans and is used in debt covenant computations. Senior management believes these measures are useful to investors because they allow for comparison to Avient's performance in prior periods without the effect of items that, by their nature, tend to obscure Avient's operating results due to the potential variability across periods based on timing, frequency and magnitude.

OnColor™ Impress™ High Gloss Metallic Effect Colorants (English) Study of the effects of formulation and thickness on the dielectric, signal transparency properties of Versaflex TPEs

A developer of gaming accessories saw an untapped market opportunity for controller grips featuring a glow-in-the-dark effect that would appeal to style- conscious customers. The final straw was the company’s inability to achieve its desired glow-in-the- dark effect. In addition to providing a custom green shade, Avient’s engineers had to ensure the glow-in-the- dark effect could match dedicated gamers’ extended periods of play.