IATF Certificate Place and date: For the issuing office: Katy, TX, 22 May 2025 Revision 10 DNV - Business Assurance 1400 Ravello Drive, Katy, TX, 77449- 5164, USA Sherif Mekkawy Management Representative Lack of fulfilment of conditions as set out in the Certification Agreement may render this Certificate invalid. ACCREDITED UNIT: DNV Business Assurance USA Inc., 1400 Ravello Drive, Katy, TX, 77449-5164, USA - TEL: +1 281-396-1000. www.dnv.com Page 1 of 2 MANAGEMENT SYSTEM CERTIFICATE Certificate no.: 11229-2006-CHN-IATF IATF Certificate No: 0573810 Valid: 21 May 2025 – 20 May 2028 This is to certify that the management system of PolyOne - Suzhou, China EM Sector, 77 Shenggang Street, Suzhou Industrial Park, Suzhou, Jiangsu, China 215024 (USI: CF4943) 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.: 11229-2006-CHN-IATF IATF Certificate No: 0573810 Place and date: Katy, TX, 22 May 2025 Lack of fulfilment of conditions as set out in the Certification Agreement may render this Certificate invalid. ACCREDITED UNIT: DNV Business Assurance USA Inc., 1400 Ravello Drive, Katy, TX, 77449-5164, USA - TEL: +1 281-396-1000. www.dnv.com Page 2 of 2 Appendix to Certificate PolyOne - Suzhou, China Remote Support Locations included in the certification are as follows: Site Name Site Address RSL Activities Certification Body Avient China Co., Ltd.

IATF Certificate Place and date: For the issuing office: Katy, TX, 10 December 2024 Revision 2 DNV - Business Assurance 1400 Ravello Drive, Katy, TX, 77449- 5164, USA Sherif Mekkawy Management Representative Lack of fulfilment of conditions as set out in the Certification Agreement may render this Certificate invalid. ACCREDITED UNIT: DNV Business Assurance USA Inc., 1400 Ravello Drive, Katy, TX, 77449-5164, USA - TEL: +1 281-396-1000. www.dnv.com Page 1 of 2 MANAGEMENT SYSTEM CERTIFICATE Certificate no.: 273138-2018-AQ-RGC-IATF IATF Certificate No: 0558323 Valid: 10 December 2024 – 09 December 2027 This is to certify that the management system of Polyone - Shenzhen Co., Ltd. ACCREDITED UNIT: DNV Business Assurance USA Inc., 1400 Ravello Drive, Katy, TX, 77449-5164, USA - TEL: +1 281-396-1000. www.dnv.com Page 2 of 2 Appendix to Certificate Polyone - Shenzhen Co., Ltd.

RTF Template P lace and date: For the is suing office: Shanghai, 30 March, 2018 DNV GL – Business Assurance Suite A, Building 9, No.1591 Hongqiao Road, Changning District, Shanghai 200336, P.R. ACCREDITED UNIT: DNV GL Business Assurance B.V., ZWOLSEWEG 1, 2994 LB, BARENDRECHT, NETHERLANDS. ACCREDITED UNIT: DNV GL Business Assurance B.V., ZWOLSEWEG 1, 2994 LB, BARENDRECHT, NETHERLANDS.

Nikrant’s 2016 Annual Incentive Program opportunities were based on business unit- specific results and, while the adjusted operating income perforff mance goals for such opportunities were weighted 60% overall, the opportunities were based two-thirds on business unit-specificff results and one-third on consolidated PolyOne adjusted operating income results. Adjusted operating income is definff ed as business unit and/or total Company operating income excluding special items (as noted on Appendix A). • Revenue. Revenue represents business unit sales or total Company net trade sales to third parties. • Working Capital as a Percentage of Sales.

Whether we’re sharing market trends, innovative materials, or new ways to reduce costs, we’re ready to collaborate and help you engage with the heart of your business – today’s consumers.  Learn more about how you can expand design freedom and find practical solutions and cost-efficient ways to manage your business and effectively reach your target audience with our materials and technologies.

CLEVELAND – PolyOne Corporation, a leading global provider of specialized polymer materials, services and solutions, is investing in its GSDI specialty dispersions business to better serve customers, improve operational efficiency, and launch innovative new colorant and additive solutions for silicone and other thermoset applications. PolyOne’s specialty dispersions business operates within its Color, Additive and Inks segment and provides colorant solutions specifically formulated to the exacting specifications for carrier systems such as silicone, rubber, vinyl, epoxy, urethane, and plasticizers.  

Partnerships that conduct a trade or business in the United States are generally required to pay a withholding tax under section 1446 on any foreign partners’ share of effectively connected taxable income from such business. You may enter your business, trade, or “doing business as” (DBA) name on line 2. c. You may enter any business, trade, or DBA name on line 2. e.

The integration and growth prospects of these businesses are on track.  Business acquisitions Business Segment and Platform Operations (Unaudited)

Gordon Composites complements our Glasforms business with leading thermoset solutions.  Business acquisitions Business Segment and Platform Operations (Unaudited)

It is therefore a purely administrative conversion and no change in the activities of the registered entity or business location. It is therefore a purely administrative conversion and no change in the activities of the registered entity or business location. It is therefore a purely administrative conversion and no change in the activities of the registered entity or business location.