No. 1, Qihang Industry Park, Haoxiang Road, Shajing Town, Baoan, Shenzhen, Guangdong, China 518104 (USI: C5M65R) and, if applicable, the remote supporting locations as mentioned in the Appendix accompanying this Certificate has been found to conform to the Quality Management System standard: IATF 16949:2016 This certificate is valid for the following scope: DESIGN AND MANUFACTURE OF PLASTIC COMPOUNDING MATERIAL EXCLUSION: NONE http://www.dnv.com Certificate no.: 273138-2018-AQ-RGC-IATF IATF Certificate No: 0558323 Place and date: Katy, TX, 10 December 2024 Lack of fulfilment of conditions as set out in the Certification Agreement may render this Certificate invalid.

Park, Pudong, Shanghai, China, 201203 Design and Manufacture of Masterbatch Polyone - Shanghai, China (Tianjin) Branch No. 28#C, Jin Bin Hi-Tech Industrial Park, 156 Nan Hai Road, Tianjin Economic-Technological, Tianjin, China, 300457 Manufacture of Masterbatch

Avient strives to be the industry leader in safety and health by setting aggressive goals, measuring performance, and making necessary adjustments.

The company is dedicated to serving customers in diverse industries around the globe, by creating value through collaboration, innovation and an unwavering commitment to excellence. Factors that could cause actual results to differ materially from those implied by these forward-looking statements include, but are not limited to: the final amount of charges resulting from the planned North American asset realignment and the Company's ability to realize anticipated savings and operational benefits from the asset realignment; our ability to achieve the strategic and other objectives relating to the acquisition of Spartech Corporation, including any expected synergies; our ability to successfully integrate Spartech and achieve the expected results of the acquisition, including, without limitation, the acquisition being accretive; disruptions, uncertainty or volatility in the credit markets that could adversely impact the availability of credit already arranged and the availability and cost of credit in the future; the financial condition of our customers, including the ability of customers (especially those that may be highly leveraged and those with inadequate liquidity) to maintain their credit availability; the speed and extent of an economic recovery, including the recovery of the housing market; our ability to achieve new business gains; the effect on foreign operations of currency fluctuations, tariffs and other political, economic and regulatory risks; changes in polymer consumption growth rates where we conduct business; changes in global industry capacity or in the rate at which anticipated changes in industry capacity come online; fluctuations in raw material prices, quality and supply and in energy prices and supply; production outages or material costs associated with scheduled or unscheduled maintenance programs; unanticipated developments that could occur with respect to contingencies such as litigation and environmental matters; an inability to achieve or delays in achieving or achievement of less than the anticipated financial benefit from initiatives related to working capital reductions, cost reductions and employee productivity goals; an inability to raise or sustain prices for products or services; an inability to maintain appropriate relations with unions and employees; the inability to achieve expected results from our acquisition activities; our ability to continue to pay cash dividends; the amount and timing of repurchases of our common shares, if any; and other factors affecting our business beyond our control, including, without limitation, changes in the general economy, changes in interest rates and changes in the rate of inflation.

High-temperature color concentrates are suitable for demanding applications in industries such as aerospace, healthcare, industrial, and automotive. Industrial Fabric Yarn

Customizable post-consumer recycled (PCR) and post-industrial recycled (PIR) options for reaching sustainability goals while maintaining performance on part with virgin PC Standard and customized grades offering 20-100% post-industrial recycled (PIR) content or grades formulated with 100% post-consumer recycled (PCR) nylon to support the circular economy Industrial Fabric Yarn

Bergadur™ semi-crystalline PBT formulations are an ideal choice for applications in a variety of industries, including transportation, household, and electrical and electronic. These formulations expand on the performance of a range of engineering resins for use in many applications and industries. Industrial Fabric Yarn

Additive Dispersions are widely used in the rubber and plastics industries to deliver usability, improved process efficiency and enhanced performance. Industrial Fabric Yarn Learn about water dispersions that are designed to help meet industry standards

Additionally, the textile industry is under pressure to become more agile and more sustainable. With global manufacturing footprint and capabilities, Avient is positioned to supply the textile industry with the highest quality colorants for fibers. Industrial Fabric Yarn

Appliance Manufacturer APPLIANCE MANUFACTURER P U S H B U T T O N S • Non-halogen to industry standards • Lower density • Good impact properties • Easy to process • High aesthetics • Provided a non-halogenated solution while improving the performance of the formerly used halogenated grade • Supported the project with various expertise in design, regulatory and technical support • Helped to reduce the system cost and make our customer more competitive in the market Maxxam NHFR Non-Halogen Flame Retardant Polyolefin Formulation KEY REQUIREMENTS WHY AVIENT?