Certificate No: 65536 Certification structure: MULTI-SITEMULTI-SITE 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 RC14001®:2023RC14001®:2023 Certificate Of ConformanceCertificate Of Conformance ANNEXANNEX Certificate No: 65536 Avient CorporationAvient Corporation At the below facilities FACILITY NAMEFACILITY NAME FACILITY ACTIVITYFACILITY ACTIVITY ADDRESSADDRESS Copyright as of the Effective Date, ABS Quality Evaluations, Inc.

Ext Building Products OEM Application Snapshot E X T E R I O R BU I L D I N G P RO D U C T S O E M S H E E T / P R O F I L E E X T R U S I O N • Source a cost competitive and effective chemical foaming additive (CFA) with prompt availability • Incorporate a CFA lightweighting solution with consistent cell structure and density for better overall operational performance • Improve material usage while manufacturing on both single and twin screw processing equipment • Met customer needs and timing with effective and efficient CFA solutions • Provided formulations that improved the dispersion and efficacy for optimized performance and control in manufacturing • Offered application and processing expertise focused on specific customer manufacturing assets and operations, allowing improved material usage and reduced operational costs Hydrocerol™ and Excelite™ CFAs KEY REQUIREMENTS WHY AVIENT?

SPORTS EQUIPMENT OEM D I S C G O L F D I S C S • Replace incumbent polymer with an alternative material that offered consistent supply and comparable performance • Colorable and able to support product differentiation using special effects • Grippy but not tacky • Ability to meet varying flexibilities and weights • Professional Disc Golf Association approval • Presented a TPE with diverse durometers to support a range of disc capabilities, weights and grip features • Delivered a durable material with good flow characteristics for simple and economical production • Provided a natural, easy-to-color material with good UV resistance • Offered a breadth of material and specialty services to enable product line expansion using metallic effects, polymer additives, and additional material formulations Dynaflex™ Thermoplastic Elastomers KEY REQUIREMENTS WHY AVIENT?

L E A D I N G C O N S U M E R P RO D U C T S O E M W A T E R P I T C H E R H A N D L E • Access to the latest colors & effects for inspiration and assistance with brand aesthetics • Meet sustainability expectations while maintaining product and brand integrity • Accelerate product development timeline to meet aggressive commercial deadlines • Offered blue marble effect in Oceanworks PS • Developed a proprietary blue marble aesthetic in a recycled PS, meeting brand and sustainability expectations • Expedited product development to satisfy ambitious timeline requirements • Provided ongoing inspiration and global support throughout the process OnColor™ (Remafin™) Polymer Colorants for polyolefins KEY REQUIREMENTS WHY AVIENT?

The Net impact of uncertain tax positions increased the effective tax rate by 0.5% ($0.9 million). Other unfavorable uncertain tax positions increased the effective tax rate by 1.6%, which offset the net decrease in the effective tax rate of the two items noted. The Net impact of uncertain tax positions increased the effective tax rate by 0.5% ($0.9 million).

These expedients are effective for the period from March 2020 to December 31, 2022. If highly effective, any subsequent test may be done qualitatively. These effectively convert a portion of our U.S.

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.

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.

Working closely with the manufacturer’s engineers, Avient determined that the material required a special combination of properties: • A heat-resistant base resin that would provide the level of signal dampening prescribed • Mechanical properties that would ensure an effective electrical connection and at the same time allow for snap-fit installation • A cost-effective solution that would enable the manufacturer to compete in this new market Striving for optimal results, the manufacturer evaluated more than 30 different materials. Avient’s willingness to invest the time and resources needed to ensure success enabled the manufacturer to develop a cost-effective, well-per forming product for its customer.

Look to us for help in solving your complex challenges with colors—special effects, molded-in metallics, high temperature applications and more. SOLID COLOR MASTERBATCHES • Customizable color solutions for a wide range of industries and uses, including high temperature applications • Special effect colors and finishes, such as metallic, pearlescent or granite • Sustainable choices, such as bio-colorants or super concentrates LIQUID COLOR CONCENTRATES • Rapid and sustainable color development that adds value and versatility to the production process • Able to combine with a variety of performance additives for multi-functional formulations PERFORMANCE AND PROCESSING ADDITIVES • Performance enhancing additives for UV protection, scratch resistance, anti-microbe formation, flame retardance and much more • Processing enhancement additives to improve efficiencies in any type of manufacturing process COLOR AND ADDITIVE COMBINATION MASTERBATCHES • Color and additive combination masterbatches that combine stock or custom colors with functional performance in a single solution • Special formulations are customized and optimized for specific needs, from paint replacement on metal to parts with the appearance of fabric Ready to learn more? Look to us for support with: • Color Technology: Custom matching, saturated colors and special effects to fill market niches and eliminate secondary operations • Color and Design Services: Trend and color insights, and product development assistance to optimize design and gain speed to market • Regulatory Coordination: Aid with new product approvals with UL, NSF, FDA, healthcare guidelines and others to reduce regulatory overhead and minimize risk • Field Technical Services: Support for tool design, startup and production optimization to gain manufacturing efficiencies • Sustainability: Innovative materials and solutions to help you meet your sustainability goals 1.844.4AVIENT www.avient.com Copyright © 2020, Avient Corporation.