ECert.QECertificate Page 1 of 2 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. Toluca 2000 Toluca, Estado de México 50233 México IATF 16949:2016 The Quality Management System is applicable to: Certificate No: 63431 Effective Date: 25 February 2022 Expiration Date: 24 February 2025 Revision Date: 25 February 2022 IATF No: 0444538 Dominic Townsend, 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 Avient de México, S.A. de C.V.

2] Avient Luxembourg S.à r.l. Palm Christoph Page 4 / 5 Délégué à la gestion journalière Pouvoir de signature La Société est valablement engagée et représentée à l'égard de tiers pour tout ce qui relève de la gestion journalière par la signature individuelle du délégué à la gestion journalière dans les limites des pouvoirs qui lui ont été délégués par décision du conseil de gérance. 05/07/2018 Personne(s) chargée(s) du contrôle des comptes ERNST & YOUNG [2] ERNST & YOUNG N° d'immatriculation au RCS B47771 ERNST & YOUNG Société anonyme 35E Avenue John F. 2] L'inscription a été faite suite à la loi du 27/05/2016 portant réforme du régime de publication légale relatif aux sociétés et associations [3] En application de l'article 21 paragraphe 2 de la loi modifiée du 19 décembre 2002 concernant le registre de commerce et des sociétés ainsi que la comptabilité et les comptes annuels des entreprises et l'article 21 du règlement grand-ducal modifié du 23 janvier 2003 portant exécution de la loi du 19 décembre 2002, le présent formulaire reprend au moins la situation à jour des données communiquées au registre de commerce et des sociétés jusqu'à un jour avant la date d'émission dudit formulaire.

ECert.QECertificate Page 1 of 2 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: 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.

ECert.pdf Page 1 of 2 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: 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.

ECert.QECertificate Page 1 of 2 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. 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.

ECert - 2023-01-13T114926.191.pdf Page 1 of 2 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. 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.

Page 1 of 2 ABS Quality Evaluations IATF 16949:2016 Certificate Of Conformance ANNEX Certificate No: IATF No: 38972 0422162 Avient Corporation Engineered Materials Division At Below Facilities: Facility: Corporate 33587 Walker Road Avon Lake, OH 44012 U.S.A. Page 2 of 2

ECert - 2020-11-17T151438.723.pdf Page 1 of 2 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.

PE Control Conventional FR Cesa F-Series 1 Cesa F-Series 2 Time, Seconds H ea t R el ea se R at e kW /m 2 2000 1500 1000 500 0 1.844.4AVIENT www.avient.com Copyright © 2024, Avient Corporation. POLYMER PRODUCT NAME PROPERTY PERFORMANCE TYPE DOSAGE/ LDR MATERIAL CODE ABS FRABS92991 UL 94 Halogen 35% CC10292991WE ABS FRABS52399 UL 94 Halogen 5–14% CC10252399WE HDPE Cesa Flam MB 5101AH UL 94 Halogen 7–16% PEAN698479 Nylon Cesa Flam MB 5728H UL 94 Halogen 8–14% ABA0698450 Nylon Cesa Flam MB 5731NH UL 94 Non-halogen 8–20% ABAN698410 PC Cesa Flam NCA0820018NH UL 94 Non-halogen 2–4% NCA0820018 PC NCAN-Z0N-FN FLMRET 698419 UL 94 Non-halogen 3–8% NCAN698419 PE FRPE94802 ASTM E84 Non-halogen 100% CC103094802F PE FRPE41011 UL 94 Halogen 20–30% CC1034101160 PET Cesa Flam MB 5525NH UL 1441, UL 94 Non-halogen 6–8% NEAN698534 PET FRPET65462 UL 94 Non-halogen 5–12% CC103265462F PET/ PBT Cesa Flam MB 5532NH NFPA 701 Non-halogen 4–6% NBAN698451 PP Cesa Flam MB 5201H UL 94 Halogen 6–30% PPAN698410 PP Cesa Flam MB CT-1629NH Cal TB 133, UL 94 Film, NFPA 701 Non-halogen 6–8% PPAN698428 PP FRPP365370 UL 94 Non-halogen 10–20% CC103653702F PP Copolymer FRPP37654 UL 94 5VA Halogen 100% CC10337654WE PP Copolymer FRPP53484 UL 94 Halogen 10% CC1035348460 PS FRPS62722 ASTM E84 Halogen 2–4% CC10262722WE PS/HIPS Cesa Flam SLA0820014H UL 94 Halogen 4–8% SLA0820014H TPU Cesa Flam 98461NH UL 94 Non-halogen 6–14% RUA0698461 F-SERIES FLAME RETARDANT ADDITIVES HDPE/PE F-Series UL 94 Non-halogen 10–25% PEA0820024 PE F-Series UL 2335, FM 4998 Non-halogen 10–25% PEA0820069

Änderungsbeschluss: Sonderband Blatt 101 ff. 2 b) Ximena, Philippe, Lyon (Frankreich), *18.11.1960 Setzen, Marc, Baden-Baden, *27.05.1969 05.02.2007 Seite 2 von 4 3 b) Adolf-Dambach-Str. 2, 76571 Gaggenau Tomaselli, Frank, La Wantzenau/Frankreich, *28.12.1963 Ximena, Philippe, Lyon (Frankreich), *18.11.1960 23.04.2009 4 b) Mohn, Christopher, Lasne/Belgien, *11.06.1955 10.01.2011 5 b) Neue Adolf-Dambach-Str.4, 76571 Gaggenau Kronimus, Holger, Hilgert, *26.01.1968 Baert, Bernard, Verviers/Belgien, *18.12.1949 Tomaselli, Frank, La Wantzenau/Frankreich, *28.12.1963 15.02.2012 6 b) Der zwischen der Gesellschaft und der nunmehr infolge Firmenänderung und Sitzverlegung "PolyOne Deutschland GmbH", Bendorf (Amtsgericht Koblenz HRB 7522) am 03.11.2014 Seite 3 von 4 13.12.1994 abgeschlossene Beherrschungs- und Ergebnisabführungsvertrag wurde neugefasst und besteht nunmehr als Gewinnabführungsvertrag fort.Die Gesellschafterversammlungen haben der Neufassung am 20.10.2014 zugestimmt. Auf die bei Gericht eingereichten Urkunden wird Bezug genommen. 7 b) Machin, Genevieve Elizabeth, Luxembourg, *31.03.1972 Katsers, Guy, Clervaux / Belgien, *26.06.1950 17.11.2016 8 b) Vertretungsbefugnis geändert (Einzelvertretungsbefugnis entfallen) bei Machin, Genevieve Elizabeth, Luxembourg / Luxemburg, *31.03.1972 mit der Befugnis, im Namen der Gesellschaft mit sich im eigenen Namen oder als Vertreter eines Dritten Rechtsgeschäfte abzuschließen. 02.02.2017 9 b) Berichtigung von Amts wegen zur Adolf-Dambach-Str. 2, 76571 Gaggenau 06.06.2018 10 b) 25.03.2019 Seite 4 von 4 Potoczny, Zaneta Gabriela, Mersch / Luxemburg, *17.10.1974 mit der Befugnis, im Namen der Gesellschaft mit sich im eigenen Namen oder als Vertreter eines Dritten Rechtsgeschäfte abzuschließen.