ISO 13485:2016 The Quality Management System is applicable to: Certificate No: 65567 Effective Date: 08 September 2023 Expiration Date: 07 September 2026 Revision Date: 08 September 2023 Dominic Townsend, President This certificate may be found on the ABS QE Website (www.abs-qe.com).

NOR AZIMAH BINTI ABDUL AZIZ REGISTRAR OF COMPANIES MALAYSIA (ACT 777) This is to certify that CERTIFICATE OF INCORPORATION ON CHANGE OF NAME OF COMPANY Dated at SEBERANG JAYA, PULAU PINANG this 25th day of August 2021. which was, on the 23rd day of May 2003, registered as foreign company under section 332 (1) of the Companies Act 1965, did on the 25th day of August 2021 change its name to POLYONE SINGAPORE PTE. This certificate is generated from MYDATA SSM Services as at 31/08/2021 12:30:12 1 1/ Date: Tue Aug 31 12:30:12 2021 Printing Date: 31/08/2021User Id: mooileen

China Date of Issue：2024-10-26 Date of Expiry：2027-10-25 Date of Initial Issue：2021-10-28 证书编号 E受审核方 英文组织机构代码 E认证范围 E注册地址 E生产办公地址 E注册日期 E有效期至 E初次颁证日期 二维码

China Date of Issue：2024-10-26 Date of Expiry：2027-10-25 Date of Initial Issue：2021-10-28 E证书编号 E受审核方 组织机构代码 英文组织机构代码 E认证范围 E注册地址 E生产办公地址 E注册日期 E有效期至 E初次颁证日期 二维码

For and on behalf of BSI: Chief Operating Officer Assurance - Americas Certification Date: 2018-05-10 Latest Issue: 2018-05-10 Expiry Date: 2021-05-09 BSI Certificate Number: 691920 IATF Number: 0303891 Page: 1 of 2 This certificate remains the property of BSI and shall be returned immediately upon request. Technologies, Purchasing, Sales, Contract review, Internal audit management, Product design Location Registered Activities BSI Certificate Number: 691920 IATF Number: 0303891 Certification Date: 2018-05-10 Latest Issue: 2018-05-10 Expiry Date: 2021-05-09 Page: 2 of 2 This certificate remains the property of BSI and shall be returned immediately upon request.

Leadership, EHS&S-PS, Facility Services, Design & Development, Information Technology, Sourcing, Logistics, Legal, and Human Resources Certificate No: 65537 Certification Date: 29 SEP 2023 Effective Date: 27 FEB 2025 Expiration Date: 27 SEP 2026 Revision Date: 05 MAR 2025 Dominic Townsend, President Copyright as of the Effective Date, ABS Quality Evaluations, Inc. Toluca 2000 Toluca Estado de México 50200 Mexico ISO 14001:2015 Certificate Of Conformance ANNEX Certificate No: 65537 Avient Corporation At the below facilities FACILITY NAME FACILITY ACTIVITY ADDRESS Copyright as of the Effective Date, ABS Quality Evaluations, Inc. Unit 3 Dodworth Business Park, Dodworth Barnsley South Yorkshire S75 3SP United Kingdom ISO 14001:2015 Certificate Of Conformance ANNEX Certificate No: 65537 Avient Corporation At the below facilities FACILITY NAME FACILITY ACTIVITY ADDRESS Copyright as of the Effective Date, ABS Quality Evaluations, Inc.

IATF 16949:2016 The Quality Management System is applicable to: Certificate No: 38972 Effective Date: 04 September 2018 Expiration Date: 03 September 2021 Issue Date: 31 December 2018 IATF No: 0328156 Alex Weisselberg, President DESIGN AND MANUFACTURE OF CUSTOM PVC PLASTISOL AND PVC SLUSH MOLD POWDER (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.

Franken Managing Director Registration number 1682419.2 Start date certificate 0610312025 Certificate valid until 2810212028 Date of first certificate 2810212019 Previous certificate valid until 2810212025 Date audit 0411212024 – 1211212024 Certificate for the environmental management system according to NENNENNENNEN1111ENENENEN1111ISOISOISOISO 14141414001:001:001:001:2015201520152015 including the current version of the underlying SCCM schemaincluding the current version of the underlying SCCM schemaincluding the current version of the underlying SCCM schemaincluding the current version of the underlying SCCM schema The certification body TÜV NORD Nederland hereby confirms that the certification 1682419.20610312025 took place in accordance with its certification regulations for the organisations 28102120282810212019 FiberFiberFiberFiber1111Line International B.V.Line International B.V.Line International B.V.Line International B.V.

WITH ADDITIONAL FACILITIES LISTED ON ATTACHED ANNEX) has been assessed by ABS Quality Evaluations, Inc. and found to be in conformance with the requirements set forth by: IATF 16949:2016 The Quality Management System is applicable to: DESIGN AND MANUFACTURE OF CUSTOM PVC PLASTISOL AND PVC SLUSH MOLD POWDER Certificate No: 38972 Effective Date: 04 September 2021 Expiration Date: 03 September 2024 Revision Date: 04 September 2021 IATF No: 0422162 Dominic Townsend, President 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.

IATF 16949:2016 The Quality Management System is applicable to: Certificate No: 58976 Effective Date: 08 February 2019 Expiration Date: 09 August 2022 Revision Date: 17 November 2020 IATF No: 0349837 Dominic Townsend, President DESIGN AND MANUFACTURE OF THERMOPLASTIC COMPOUNDS (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 Avient 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.