Microsoft Word - 55543 Letter of Conformity RCMS Option 2 .docx ABS Quality Evaluations Letter Of Conformity This is to confirm that the Environment, Health, Safety and Security Management System of: PolyOne Corporation 3100 North 35th Street Terre Haute, IN 47804 U.S.A. WITH ADDITIONAL FACILITIES LISTED ON THE ATTACHED ANNEX) has been assessed by ABS Quality Evaluations, Inc. and found to be in conformance with the requirements set forth by: RCMS®:2013 (Option 2) The Environment, Health, Safety and Security Management System is applicable to: Design and Manufacture of Plastic Compounds Certificate No: 55543 Effective Date 21 December 2017 ABS Quality Evaluations, Inc. 16855 Northchase Drive, Houston, TX 77060, U.S.A.

ECert.pdf Page 1 of 2 Validity of this certificate is based on the successful completion of the periodic surveillance audits of the management system defined by the above scope and is contingent upon prompt,written notification to ABS Quality Evaluations, Inc. of significant changes to the management system or components thereof. ABS Quality Evaluations This is to certify that the Quality Management System of: PolyOne Corporation PolyOne 1260 Carden Farm Drive Clinton, TN 37716 U.S.A. IATF 16949:2016 The Quality Management System is applicable to: Certificate No: 38223 Effective Date: 03 July 2018 Expiration Date: 02 July 2021 Issue Date: 03 July 2018 IATF No: 0313794 Alex Weisselberg, President DESIGN AND COMPOUNDING OF THERMOPLASTIC PRODUCTS (WITH ADDITIONAL FACILITIES LISTED ON ATTACHED ANNEX) Certificate Of Conformance has been assessed by ABS Quality Evaluations, Inc. and found to be in conformance with the requirements set forth by: Page 2 of 2 ABS Quality Evaluations PolyOne Corporation IATF 16949:2016 Certificate Of Conformance ANNEX At Below Facilities: Validity of this certificate may be confirmed at www.abs-qe.com/cert_validation.

China TEL: +86 21 32799000 Zhu Hai Ming Management Representative Lack of fulfilment of conditions as set out in the Certification Agreement may render this Certificate invalid. ACCREDITED UNIT: DNV Business Assurance B.V., Zwolseweg 1, 2994 LB, Barendrecht, Netherlands - TEL: +31(0)102922689. www.dnv.com/assurance Certificate No: 2997-2006-AQ-RGC-RvA Initial certification date: 08 June, 2006 Valid: 11 April, 2022 – 11 April, 2025 This is to certify that the management system of Polyone - Suzhou, China EM Sector, 77 Shenggang Street, Suzhou Industrial Park, Suzhou, Jiangsu, China, 215024 and the sites as mentioned in the appendix accompanying this certificate has been found to conform to the Quality Management System standard: GB/T 19001-2016/ISO 9001:2015 This certificate is valid for the following scope: Design and Manufacture of Plastic Compounding Material Certificate No: 2997-2006-AQ-RGC-RvA Place and date: Shanghai, 27 April, 2022 Lack of fulfilment of conditions as set out in the Certification Agreement may render this Certificate invalid. ACCREDITED UNIT: DNV Business Assurance B.V., Zwolseweg 1, 2994 LB, Barendrecht, Netherlands - TEL: +31(0)102922689. www.dnv.com/assurance Page 2 of 2 Appendix to Certificate Polyone - Suzhou, China Locations included in the certification are as follows: Site Name Site Address Site Scope PolyOne Management (Shanghai) Co., Ltd.

CNSUZ3-SUH9-20240123104552 QUALITY MANAGEMENT SYSTEM\,, CERTIFICATE Certificate No. 00124Q30506R5S/3200 We hereby certify that Color Matrix Plastic Colorants (Suzhou) Co., Ltd Business Registration Number: 91320505799067336K Registered I Operation Address: 13 Plant, No.855, Zhujiang Road, Suzhou New District, Jiangsu Province, China by reason of its Quality Management System has been awarded this certificate for compliance with the standard ISO 9001:2015 The Quality Management System Applies in the following area: Production Activities of Plastic Colorant & Additive (UV Blockers, Anti-Oxidation, Anti-Aging) Certified since: 2009年1月8日 Valid from: 2024年1月16日 Valid until: 2027年1月4日 the expiry date of last certification cycle: 2024年1月4日 the date of recertification audit: 2023年12月21日 to 2023年12月22日 After a surveillance cycle, the certificate is valid only when used together with an Acceptance Notice of Surveillance Audit issued by CQC. � 'Pf.ili>..P]' GNAs:::� � MANAGEMENT SYSTEM ...,,._.....

MSC Certificate Place and date: For the issuing office: Shanghai, 20 March 2024 DNV - Business Assurance Building 9, No. 1591 Hongqiao Road, Changning DistrictShanghai China 200336 Zhu Hai Ming Management Representative Lack of fulfilment of conditions as set out in the Certification Agreement may render this Certificate invalid. ACCREDITED UNIT: DNV Business Assurance B.V., Zwolseweg 1, 2994 LB, Barendrecht, Netherlands - TEL: +31(0)102922689. www.dnv.com/assurance MANAGEMENT SYSTEM CERTIFICATE Certificate no.: 7071-1998-AQ-RGC-RvA Initial certification date: 28 April 1998 Valid: 30 March 2024 – 29 March 2027 This is to certify that the management system of PolyOne-Shanghai, China No. 88, Guo Shou Jing Road, Z. Park, China (Shanghai) Pilot Free Trade Zone, Shanghai, China 201203 and the sites as mentioned in the appendix accompanying this certificate has been found to conform to the Quality Management System standard: GB/T 19001-2016 / ISO 9001:2015 This certificate is valid for the following scope: Design and Manufacture of Colour and Additive Concentrates http://www.dnv.com/assurance Certificate no.: 7071-1998-AQ-RGC-RvA Place and date: Shanghai, 20 March 2024 Lack of fulfilment of conditions as set out in the Certification Agreement may render this Certificate invalid.

� ENVIRONMENTAL MANAGEMENT,_, ' J� - � Certificate No. 00124E30295R4S/3200 We hereby certify that Color Matrix Plastic Colorants (Suzhou) Co., Ltd Business Registration Number: 91320505799067336K Registered/ Operation Address: 13 Plant, No.855, Zhujiang Road, Suzhou New District, Jiangsu Province, China by reason of its Environmental Management System has been awarded this certificate for compliance with the standard ISO 14001:2015 The Environmental Management System Applies in the following area: Production and Related Management Activities of Plastic Colorant & Additive (UV Blockers, Anti-Aging,Anti-Oxidation) Certified since: 2012年6月6日 Valid from: 2024年1月17日 Valid until: 2027年1月7日 the expiry date of last certification cycle: 2024年1月7日 the date ofrecertification audit: 2023年12月21日 to 2023年12月22日 After a surveillance cycle, the certificate is valid only when used together with an Acceptance Notice of Surveillance Audit issued by CQC.

The new accounting standard is effective 2018年1月1日 and requires all components of annual periodic pension and postretirement costs, other than service costs, to be presented below Operating Income.

TEL:+31102922689. assurance. dnvgl.com C ertificate N o: 1 6 1 4-2000-AE-RGC-RvA I nitial c ertification date: 2 3 M ay, 2 0 00 V alid: 2 3 M ay, 2 0 18 - 2 3 May, 2 021 This is to certify that the management system of PolyOne-Shanghai, China No. 88, Guo Shou Jing Road, Z. Park, Pudong, Shanghai, China, 201203 has been found to conform to the Environmental Management System standard: ISO 14001:2015 This certificate is valid for the following scope: Design and Manufacture of Masterbatch

She has global responsibility for the Human Resources function, including performance management, succession planning, compensation, benefits administration, recruiting, labor relations, and talent development. Gajewski led Avient’s learning and organizational development programs, talent management and acquisition, as well as working as the HR Director for all global Corporate Functions.

Unified social credit code: 91320412MA1NMF5W4P is in conformity with Environmental Management System Standard: GB/T24001-2016 / ISO14001:2015 The certificate is valid to the following product(s)/service: Textile (Yarn), Glass Products (Yarn) Coating Processing and Related Management Activities Registration Address/ Physical Address: R&D Workshop 5, No. 8, Lanxiang Road, West Taihu Science and Technology Industrial Park, Changzhou City, Jiangsu Province, P.