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.

Corporate seat Amsterdam First entry in Business Register 12-04-2006 Date of deed of incorporation 11-04-2006 Date of deed of last amendment to the Articles of Association 12-04-2021 Issued capital EUR 19.593,63 Paid-up capital EUR 19.593,63 Filing of the annual accounts The annual accounts for the financial year 2019 were filed on 01-07-2020. Company start date 11-04-2006 Activities SBI-code: 46751 - Wholesale of basic and industrial chemicals Employees 4 Establishment Establishment number 000019561423 Trade name Avient Colorants Netherlands B.V. The Chamber of Commerce recommends that this document be viewed in digital form so that its integrity is safeguarded and the signature remains verifiable. 20 21 -0 4- 12 1 4: 06 :2 8 under number CHE-112.279.714 Sole shareholder since 20-10-2015 (registration date: 03-11-2015) Board members Name Borst, Rainer Erich Date of birth 10-10-1961 Date of entry into office 01-07-2020 (registration date: 06-07-2020) Title Director Powers Solely/independently authorised Name Kamalak, Ihsan Date of birth 21-08-1985 Date of entry into office 01-07-2020 (registration date: 06-07-2020) Title Director Powers Solely/independently authorised Name Merklein, Norbert Date of birth 03-05-1964 Date of entry into office 05-03-2021 (registration date: 30-03-2021) Powers Solely/independently authorised Extract was made on 12-04-2021 at 14.06 hours.

Date: 02/08/2021 ACCOUNTING AND CORPORATE REGULATORY AUTHORITY WHILST EVERY ENDEAVOR IS MADE TO ENSURE THAT INFORMATION PROVIDED IS UPDATED AND CORRECT. LTD. (199006136Z) (ACRA) Number Of Shares Currency COMPANY HAS THE FOLLOWING ORDINARY SHARES HELD AS TREASURY SHARES Registered Office Address 3 INTERNATIONAL BUSINESS PARK #04-14/15 NORDIC EUROPEAN CENTRE SINGAPORE (609927) : Date of Address 16/08/2020: Date of Last AGM : 29/08/2020 Date of Last AR : 26/10/2020 FYE As At Date of Last AR : 31/12/2019 Audit Firms NAME ERNST & YOUNG LLP Amount Secured Chargee(s) Charges CurrencyCharge No. DATE : : 02/08/2021 ACRA210802126796 This is computer generated.

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, PresidentDominic Townsend, President Copyright as of the Effective Date, ABS Quality Evaluations, Inc. No:8 , 34538 Esenyurt, Türkiye Avient Corporation Design and Manufacture of Colorants and Additives for Plastics No. 8 Third Chin Bee Road, Jurong Industrial Estate Singapore 618684 Avient Corporation Design & Manufacture of Color, Additive Concentrate & Specialty Compounds Kalol Works, Shed No.18-22, GIDC Estate Kalol Gujarat 389330 India Copyright as of the Effective Date, ABS Quality Evaluations, Inc. Toluca 2000 Toluca Estado de México 50200 Mexico ISO 14001:2015ISO 14001:2015 Certificate Of ConformanceCertificate Of Conformance ANNEXANNEX Certificate No: 65537 Avient CorporationAvient Corporation At the below facilities FACILITY NAMEFACILITY NAME FACILITY ACTIVITYFACILITY ACTIVITY ADDRESSADDRESS Copyright as of the Effective Date, ABS Quality Evaluations, Inc.

IATF 16949:2016 The Quality Management System is applicable to: Certificate No: 39913 Effective Date: 30 November 2017 Expiration Date: 29 November 2020 Issue Date: 30 November 2017 IATF No: 0280241 Alex Weisselberg, President DESIGN AND MANUFACTURE OF COLOR CONCENTRATES (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.

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.

IATF 16949:2016 The Quality Management System is applicable to: Certificate No: 39032 Effective Date: 14 August 2018 Expiration Date: 13 August 2021 Issue Date: 17 August 2018 IATF No: 0322936 Alex Weisselberg, President MANUFACTURE, DESIGN AND SUPPLY OF PROPRIETARY THERMOPLASTIC COMPOUNDS, INCLUDING THE SUPPLY OF TOLL COMPOUNDING SERVICES (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.

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.