ABS Quality Evaluations This is to certify that the Quality Management System of: Avient Corporation Avient Corporation - McHenry, IL 831 Ridgeview Drive McHenry, IL 60050 U.S.A. ISO 13485:2016 The Quality Management System is applicable to: Certificate No: 45324 Certification Date: 24 February 2014 Effective Date: 13 January 2023 Expiration Date: 23 January 2026 Revision Date: 13 January 2023 Dominic Townsend, President DESIGN, MANUFACTURE AND DISTRIBUTION OF THERMOPLASTIC ELASTOMER RESINS & PELLETS FOR THE MEDICAL DEVICE INDUSTRY This certificate may be found on the ABS QE Website (www.abs-qe.com). 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 ISO 13485:2016 Certificate Of Conformance ANNEX At Below Facilities: Validity of this certificate may be confirmed at www.abs-qe.com/cert_validation.

POLYONE FRANCE TOSSIAT 43, PLACE DE LA GARE 01250 TOSSIAT FRANCE Bureau Veritas Certification France certify that the Management System of the above organization has been audited and found to be in accordance with the requirements of the management system standard detailed below: Standard ISO 14001:2015 Scope of certification THE DESIGN AND MANUFACTURE OF COLOUR AND ADDITIVE CONCENTRATES FOR THERMOPLASTICS Certification/Recertification Cycle Start Date: 03 May 2023 Subject to the continued satisfactory operation of the organization’s Management System, this certificate expires on: 02 May 2026 Expiry date of previous cycle: NA Certification/Recertification Audit date: 08 March 2023 Original Cycle Start Date: 15 July 2011 Certificate n°: FR081968-1 File n°:15608678 Revision date:24 April 2023 Laurent CROGUENNEC - President Local Office: Bureau Veritas Certification France Le Triangle de l'Arche - 9 Cours du Triangle - 92937 Paris La Défense Further clarifications regarding the scope of this certificate the applicability of the management system requirements may be obtained by consulting the organization. To check this certificate validity, please use the QR Code. 1/1

During the Covid-19 pandemic, it has become apparent that globalization raises a number of issues. Avient’s Mevopur™ portfolio and risk mitigation concept can help healthcare manufacturers on the journey to increased security of supply for plastics used in their products. All four sites are ISO 13485 certified and use a harmonized raw material range as the base for globally available Mevopur standard portfolios and for custom formulations.

Colorant Chromatics est une filiale de Avient Corporation. Colorant Chromatics  è una società di Avient Corporation. Global Locations

Mevopur™ Colorants represent a broad range of color concentrates and formulations, developed specifically for use in today’s complex healthcare applications, which meet or exceed requirements for regulations such as USP Class VI, ISO 10993, USP 661 and ICH Q3D. To access Avient’s news library online, please visit www.avient.com/news. Avient Announces Quarterly Dividend...

CERTIFICATE Signed for the certification body: Eric Louys Chairman Certification Committee CERTIFICATE EN ISO 50001 : 2018 Energy Management System VINÇOTTE nv Jan Olieslagerslaan 35, 1800 Vilvoorde, Belgium This is to certify that Avient Located at Rue Melville Wilson 2 5330 Assesse Belgium has established and maintains an energy management system according the requirements of EN ISO 50001 : 2018 “Energy Management System” for: Design and manufacture of colour and additive concentrates, thermoplastic resins and speciality compounds This certificate is based on the result of an energy audit documented in the audit report 61231731. Certificate number: 24 EN 47 Valid from 1 February 2024 to 31 January 2027 Further clarifications regarding the scope of this certificate and the applicability of EN ISO 50001 : 2018 requirements may be obtained by consulting the organization. This certificate is granted during the Certification Commission of 1 February 2024 and is subject to the General Regulations of VINÇOTTE nv.

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 7 ABS Quality Evaluations Avient Corporation ISO 9001:2015 Certificate Of Conformance ANNEX At Below Facilities: Validity of this certificate may be confirmed at www.abs-qe.com/cert_validation. Activity: Manufacture of Colorants for Plastics Activity: Manufacture of thermoplastic compounds Page 4 of 7 ABS Quality Evaluations Avient Corporation ISO 9001:2015 Certificate Of Conformance ANNEX At Below Facilities: Validity of this certificate may be confirmed at www.abs-qe.com/cert_validation. Activity: Manufacturing, Shipping and Receiving Activity: Compound and supply of thermoplastics for the medical device industry Page 5 of 7 ABS Quality Evaluations Avient Corporation ISO 9001:2015 Certificate Of Conformance ANNEX At Below Facilities: Validity of this certificate may be confirmed at www.abs-qe.com/cert_validation.

PHARMACEUTICAL PACKAGING OEM V I A L S , B O T T L E S & C O N T A I N E R S • Raw materials pre-tested to USP 661.1 and ICHQ3D guidelines • Stabilization during molding and sterilization processes for both opaque and transparent polymer materials • Certified formulations available globally • Offered pre-tested raw materials and produced in an ISO 13485 certified site, minimizing risk across the pharmaceutical value chain • Delivered specialized formulated solutions to meet stringent pharmaceutical packaging requirements • Provided global formulations transferrable from our three ISO 13485 certified facilities Mevopur™ Healthcare Concentrates KEY REQUIREMENTS WHY AVIENT? AVIENT SOLUTION CERTIFICATION + AVAILABILITY LEARN MORE © 2021, Avient Corporation, All Rights Reserved https://www.avient.com/products/polymer-colorants/solid-color-masterbatches/mevopur-custom-colors-and-formulations

MSC Certificate Place and date: For the issuing office: Shanghai, 10 October 2024 DNV - Business Assurance Building 9, No. 1591 Hongqiao Road, Changning District, Shanghai, 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.: 3033-2006-AQ-RGC-RvA Initial certification date: 07 November 2018 Valid: 08 November 2024 – 07 November 2027 This is to certify that the management system of Polyone - Shenzhen Co., Ltd. No. 1, Qihang Industry Park, Haoxiang Road, Shajing Town, Baoan, Shenzhen, Guangdong, China 518104 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: Development and Manufacture of Masterbatch, Pigment Concentration, Plastisol; Manufacture of Plastic Compounding Material http://www.dnv.com/assurance 证书制作地点及日期: 证书认可签发机构: 上海, 2024年10月 10日 DNV - Business Assurance 中国上海市长宁区虹桥路1591号9号楼A座 邮编: 200336 电话: +86 21 32799000 朱海明 管理代表 未履行认证协议中规定条款会导致此证书失效，获证组织必须定期接受监督审核并经审核合格此证书方继续有效。

To access PolyOne’s news library online, please go to www.avient.com/news. Avient To Hold First Quarter 2025 Conference Call... Avient Announces Quarterly Dividend...