ABS Quality Evaluations Certificate Of Conformance PolyOne Corporation 733 E. Validity of this certificate may be confirmed at www.abs-qe.com/cert_validation. All rights reserved. http://www.abs-qe.com/cert_validation PolyOne Corporation has been assessed by ABSQuality Evaluations,Inc. and found to be in conformance with the requirements set forth by: Certificate No: 55421

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. TEL:+31102922689. assurance.dnvgl.com C ertificate No: 1614-2000-AE-RGC-RvA Initial certification date: 23 May, 2000 V alid: 23 May, 2018 - 23 May, 2021 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

Müller, CEO sqs.ch Swiss Made Member of Swiss Association for Quality and Management Systems (SQS) Bernstrasse 103, 3052 Zollikofen, Switzerland Appendix of main certificate H61173 Avient Switzerland GmbH Hauptstrasse 30 4127 Birsfelden Switzerland Central function Scope Norm / Revision Reg. no. H61173 Page 2 of 3 Validity 01. 03. 2025 – 29. 02. 2028 Issue 01. 03. 2025 The validity of this appendix depends on the validity of the main certificate. H61173 Page 3 of 3 Validity 01. 03. 2025 – 29. 02. 2028 Issue 01. 03. 2025 The validity of this appendix depends on the validity of the main certificate.

What Quality Certifications do you maintain? Refer to our website to view certifications: http://www.avient.com/company/policies-and- governance/global-iso-certificate-library Who is Avient’s assessment body/registrar? Annually, with exception of central certificates—at minimum every 3 years.

Delaware The First State Page 1 5799827 8100 Authentication: 202256240 SR# 20210072080 Date: 01-11-21 You may verify this certificate online at corp.delaware.gov/authver.shtml I, JEFFREY W. BULLOCK, SECRETARY OF STATE OF THE STATE OF DELAWARE, DO HEREBY CERTIFY THE ATTACHED IS A TRUE AND CORRECT COPY OF THE CERTIFICATE OF AMENDMENT OF “CLARIANT PLASTICS & COATINGS USA LLC”, CHANGING ITS NAME FROM "CLARIANT PLASTICS & COATINGS USA LLC" TO "AVIENT COLORANTS USA LLC", FILED IN THIS OFFICE ON THE ELEVENTH DAY OF JANUARY, A.D. 2021, AT 10:39 O`CLOCK A.M. AND I DO HEREBY FURTHER CERTIFY THAT THE EFFECTIVE DATE OF THE AFORESAID CERTIFICATE OF AMENDMENT IS THE FIFTEENTH DAY OF JANUARY, A.D. 2021.

CERTIFICATE CONFIRMING INCORPORATION OF COMPANY AVIENT COLORANTS SINGAPORE PTE.

Certificate of Amendment Loi canadienne sur les sociétés par actionsCanada Business Corporations Act Certificat de modification Avient Colorants Canada Inc. 942266-8 Corporate name / Dénomination sociale Corporation number / Numéro de société Raymond Edwards Date of amendment (YYYY-MM-DD) Date de modification (AAAA-MM-JJ) Director / Directeur 2021-01-15 I HEREBY CERTIFY that the articles of the above-named corporation are amended under section 178 of the Canada Business Corporations Act as set out in the attached articles of amendment.

Certificate - IATF 16949 - Avient Corporation - 596306 - 2806569 (2).pdf