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.

As of December 31, 2018, we had completed our accounting for the tax effects of the enactment of the TCJA. If highly effective, any subsequent test may be done qualitatively. This effectively converts a portion of our U.S.

Certificate Avient Corporation Certificate Of Conformance This is to certify that the Quality Management System of: Avient Corporation 33587 Walker Road Avon Lake OH 44012 United States has been assessed by ABS Quality Evaluations, Inc. and found to be in conformance with the requirements set forth by: ISO 9001:2015 The Quality Management System is applicable to: Design and manufacture of colour and additive concentrates, thermoplastic resins and specialty compounds Certificate No: 65799 Certification Date: 01 OCT 2020 Effective Date: 25 SEP 2023 Expiration Date 30 SEP 2026 Revision Date: 06 DEC 2024 Dominic Townsend, President Copyright as of the Effective Date, ABS Quality Evaluations, Inc. Administration, Site management (Facitilities, EHS), Manufacture, Laboratory (QC and Technical Development), Maintenance and Infrastructure, Warehouse and Transport, SCM(DIP, Logistics, CSD, Call-off), QC, Product Stewardship 30, Hsing Pang Road Taoyuan 33068 Taiwan FACILITY NAME FACILITY ACTIVITY ADDRESS Copyright as of the Effective Date, ABS Quality Evaluations, Inc. Development and manufacturing of Masterbatch products (including additive Masterbatch) No 88 Lane 4377 Jindu Road 201108 Shanghai FACILITY NAME FACILITY ACTIVITY ADDRESS Copyright as of the Effective Date, ABS Quality Evaluations, Inc.

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).

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.

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.

These colorants are based in polysulfone resins which can withstand up to 1,000 autoclave cycles and high heat sterilization to 150°C, as well as hold up to the effects of harsh cleaning agents. Custom and special effect colors available on request. Custom and special effect colors available on request.

Failure to successfully or cost-effectively integrate the APM business could have an adverse effect on our business, financial condition, results of operations and cash flow. The guidance is effective for all entities for fiscal years beginning after December 15, 2022, except for the rollforward requirement, which is effective for fiscal years beginning after December 15, 2023. If highly effective, any subsequent test may be done qualitatively.

SNOWFLAKE EFFECT

SPECIAL EFFECTS 5