11229-2006-CHN-IATF IATF Certificate No: 0573810 Valid: 21 May 2025 – 20 May 2028 This is to certify that the management system of PolyOne - Suzhou, China EM Sector, 77 Shenggang Street, Suzhou Industrial Park, Suzhou, Jiangsu, China 215024 (USI: CF4943) and, if applicable, the remote supporting locations as mentioned in the Appendix accompanying this Certificate has been found to conform to the Quality Management System standard: IATF 16949:2016 This certificate is valid for the following scope: DESIGN AND MANUFACTURE OF PLASTIC COMPOUNDING MATERIAL EXCLUSION: NONE http://www.dnv.com Certificate no.: 11229-2006-CHN-IATF IATF Certificate No: 0573810 Place and date: Katy, TX, 22 May 2025 Lack of fulfilment of conditions as set out in the Certification Agreement may render this Certificate invalid. ACCREDITED UNIT: DNV Business Assurance USA Inc., 1400 Ravello Drive, Katy, TX, 77449-5164, USA - TEL: +1 281-396-1000. www.dnv.com Page 2 of 2 Appendix to Certificate PolyOne - Suzhou, China Remote Support Locations included in the certification are as follows: Site Name Site Address RSL Activities Certification Body Avient China Co., Ltd. EM Sector, 77 Shenggang Street, Suzhou Industrial Park, Suzhou, Jiangsu, China 215024 (USI: T2HN2N) Sales, Contract Review DNV PolyOne Management (Shanghai) Co., Ltd.

It’s in this spirit that we joined legacy PolyOne and the Clariant Masterbatch business, two complementary businesses, and formed a new one that we’ve named Avient. As one, we are better positioned than ever before to lead and to make a positive difference. We are better together through: Keeping Safety First — PolyOne and Clariant are both ACC Responsible Care® companies, and nothing is more important than the health, safety and well-being of our people.

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is a wholly-owned subsidiary of PolyOne Corporation. Case Study AxioMed Spine Corporation: Replacement Disc for the Spine Challenges: Designers at AxioMed Spine Corp. seized an opportunity to create a revolutionary replacement disc for the spine using polymer and titanium. is a wholly-owned subsidiary of PolyOne Corporation.

ABS Quality Evaluations This is to certify that the Quality Management System of: PolyOne Corporation 733 E. 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.

ABS Quality Evaluations This is to certify that the Quality Management System of: PolyOne Corporation Plastics Compounds and Colorants Group 107 Jackson Street Dyersburg, TN 38024 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.

ABS Quality Evaluations This is to certify that the Quality Management System of: PolyOne Corporation 80 North West Street Norwalk, OH 44857 U.S.A. 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.

Green served as Vice President, Data Center Group at Intel Corporation, a semiconductor company, and as President, Intel Federal LLC, a subsidiary of Intel Corporation, from 2015 to 2018, and previously in various other roles of increasing responsibility at Intel Corporation. Retired Vice President, Chief Financial Officer of Stryker Corporation (“Stryker”), one of the world’s leading medical technology (“Medtech”) companies. Governance & Corporate Responsibility

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Our purpose at Avient Corporation is to be an innovator of materials solutions to help our customers succeed, while enabling a sustainable world.