and the applicable customer specific requirements Revision:11 For Bureau Veritas Certification Holding, Le Triangle de l'Arche, 8 Cours du Triangle - 92800 Puteaux - France None Bureau Veritas Certification Certificate N°: FR072877FR072877- IATF- IATF IATF Certificate N°: 442787442787 Date Of Expiration: 01-February-202501-February-2025 Date Of Certification: 02-February-202202-February-2022 PRODUCT(S) DELIVEREDPRODUCT(S) DELIVERED colour with additive concentrates for thermoplastic resins and speciality compounds obtained by mixing and extrusion PERMITTED EXCLUSION(S)PERMITTED EXCLUSION(S) SCOPESCOPE Design and manufacturing Bureau Veritas Certification certify that the Quality Management System of the above organisation has been audited and found to be in accordance with the requirements of Route de la Vavrette, 01250, TOSSIAT FranceRoute de la Vavrette, 01250, TOSSIAT France PolyOne France TossiatPolyOne France Tossiat Awarded to Certificate of ApprovalCertificate of Approval https://e-cer.bureauveritas.com/FMSNR3ILR1QPBBMGXNKFUDB2LWB28AYDXJNZADBZ8WDH3QYML73QK0B7L7V6CZQPGPGDYLG2UVXWEPJVT4Q0E4Z0DOKSEXCP0BNO7K2WUHCQB2Q9ORVVTV4F9DTN2UI35L https://e-cer.bureauveritas.com/FMSNR3ILR1QPBBMGXNKFUDB2LWB28AYDXJNZADBZ8WDH3QYML73QK0B7L7V6CZQPGPGDYLG2UVXWEPJVT4Q0E4Z0DOKSEXCP0BNO7K2WUHCQB2Q9ORVVTV4F9DTN2UI35L https://e-cer.bureauveritas.com/FMSNR3ILR1QPBBMGXNKFUDB2LWB28AYDXJNZADBZ8WDH3QYML73QK0B7L7V6CZQPGPGDYLG2UVXWEPJVT4Q0E4Z0DOKSEXCP0BNO7K2WUHCQB2Q9ORVVTV4F9DTN2UI35L https://e-cer.bureauveritas.com/FMSNR3ILR1QPBBMGXNKFUDB2LWB28AYDXJNZADBZ8WDH3QYML73QK0B7L7V6CZQPGPGDYLG2UVXWEPJVT4Q0E4Z0DOKSEXCP0BNO7K2WUHCQB2Q9ORVVTV4F9DTN2UI35L https://e-cer.bureauveritas.com/FMSNR3ILR1QPBBMGXNKFUDB2LWB28AYDXJNZADBZ8WDH3QYML73QK0B7L7V6CZQPGPGDYLG2UVXWEPJVT4Q0E4Z0DOKSEXCP0BNO7K2WUHCQB2Q9ORVVTV4F9DTN2UI35L https://e-cer.bureauveritas.com/FMSNR3ILR1QPBBMGXNKFUDB2LWB28AYDXJNZADBZ8WDH3QYML73QK0B7L7V6CZQPGPGDYLG2UVXWEPJVT4Q0E4Z0DOKSEXCP0BNO7K2WUHCQB2Q9ORVVTV4F9DTN2UI35L https://e-cer.bureauveritas.com/FMSNR3ILR1QPBBMGXNKFUDB2LWB28AYDXJNZADBZ8WDH3QYML73QK0B7L7V6CZQPGPGDYLG2UVXWEPJVT4Q0E4Z0DOKSEXCP0BNO7K2WUHCQB2Q9ORVVTV4F9DTN2UI35L REMOTE SUPPORT FUNCTION(S)REMOTE SUPPORT FUNCTION(S) (The official document is in English. Revision:11 For Bureau Veritas Certification Holding, Le Triangle de l'Arche, 8 Cours du Triangle - 92800 Puteaux - France Bureau Veritas Certification Certificate N°: FR072877FR072877- IATF- IATF IATF Certificate N°: 442787442787 Date Of Expiration: 01-February-202501-February-2025 Date Of Certification: 02-February-202202-February-2022 Route de la Vavrette, 01250, TOSSIAT FranceRoute de la Vavrette, 01250, TOSSIAT France PolyOne France TossiatPolyOne France Tossiat Awarded to Appendix to the Certificate of ApprovalAppendix to the Certificate of Approval Name Address Scope AVIENT LUXEMBOURG ROUTE DE BASTOGNE, 19, 9836, POMMERLOCH Luxembourg Logistic, Supplier Management, Purchasing PolyOne Europe Logistics 7 rue Blériot, 4460, GRACE HOLLOGNE Belgium Warehousing Polyone Europe ul.

在很宽的频率范围仍保持稳定的射频性能 0 ,0 2 ,0 4 ,0 6 ,0 8 ,0 1 0 ,0 1 2 ,0 0 1 0 2 0 3 0 4 0 5 0 6 0 D ie le ct ri c co n s ta n t F re que nc y [G H z ] P R E P E R M ® P P E 95 0 P R E P E R M ® P P E 80 0 P R E P E R M ® P P E 44 0 P R E P E R M ® P P E 32 0 P R E P E R M ® P P E 26 0 生产过程中批次间的稳定性 * 2018 年芬兰有限公司VTT技术研究中心测量数据 介 电 常 数 损 耗 因 数 介 电 常 数 频率 [GHz] 频率 [GHz] 分批编号 （1250 kg/批次） PREPERM™ PPE950 PREPERM™ PPE800 PREPERM™ PPE440 PREPERM™ PPE320 PREPERM™ PPE260 -- 目标介电常数 -- +/- 2% 3 ,7 6 3 ,7 8 3 ,8 0 3 ,8 2 3 ,8 4 3 ,8 6 3 ,8 8 3 ,9 0 3 ,9 2 3 ,9 4 0 1 2 3 4 5 6 7 8 D ie le ct ri c co n s ta n t P a lle t numbe r (1 2 5 0 k g/pa lle t ) D ie le c t ric c o n s t a nt t a rge t +/ - 2 % 0 ,0 0 0 0 ,0 0 2 0 ,0 0 4 0 ,0 0 6 0 ,0 0 8 0 ,0 1 0 0 1 0 2 0 3 0 4 0 5 0 6 0 L o s s t a n g e n t F re que nc y [G H z ] P R E P E R M ® P P E 95 0 P R E P E R M ® P P E 80 0 P R E P E R M ® P P E 44 0 P R E P E R M ® P P E 32 0 P R E P E R M ® P P E 26 0 0 ,0 0 0 0 ,0 0 2 0 ,0 0 4 0 ,0 0 6 0 ,0 0 8 0 ,0 1 0 0 1 0 2 0 3 0 4 0 5 0 6 0 L o s s t a n g e n t F re que nc y [G H z ] P R E P E R M ® P P E 95 0 P R E P E R M ® P P E 80 0 P R E P E R M ® P P E 44 0 P R E P E R M ® P P E 32 0 P R E P E R M ® P P E 26 0 0 ,0 0 0 0 ,0 0 2 0 ,0 0 4 0 ,0 0 6 0 ,0 0 8 0 ,0 1 0 0 1 0 2 0 3 0 4 0 5 0 6 0 L o s s t a n g e n t F re que nc y [G H z ] P R E P E R M ® P P E 95 0 P R E P E R M ® P P E 80 0 P R E P E R M ® P P E 44 0 P R E P E R M ® P P E 32 0 P R E P E R M ® P P E 26 0 1.844.4AVIENT www.avient.com 版权所有©2022 埃万特公司。

• Prise en charge totale de la certification du produit final pour les normes EN13432 et EN17033 • Formulé avec des pigments testés et approuvés par un organisme certifié OnColor™ Bio-Colorants PRINCIPALES EXIGENCES POURQUOI AVIENT ?

BIODEGRADABILI E COMPOSTABILI T E L I P E R P A C C I A M A T U R A • In conformità con lo standard europeo EN17033 o OK Compost • Disponibili nelle versioni in nero o bianco e certificati secondo le norme TÜV Austria (OK Compost e altre) • Supporto completo per la certificazione del prodotto finale secondo gli standard EN13432 ed EN17033 • Formulati con pigmenti testati e approvati da organismi di certificazione OnColor™ Bio-Colorants REQUISITI CHIAVE PERCHÉ AVIENT?

Rosenau Page 84 United States 81% Europe Canada 15% Asia 2% 2011 Revenue: $0.9 Billion2011 Revenue: $0.9 Billion SolutionsSolutions At a Glance Performance Products and Solutions Europe 2% 2% $400 $600 $800 $1,000 $1,200 0.0% 2.0% 4.0% 6.0% 8.0% 10.0% 12.0% 14.0% 2006 2007 2008 2009 2010 2011 2015 S a le s ($ m il li o n s) O p e ra ti n g I n c o m e % o f S a le s Operating Income % and Revenue 2011 Revenue by Industry Segment2011 Revenue by Industry Segment Expanding ProfitsExpanding Profits OI % of Sales Sales 9-12% Appliance 4% Building & Construction 30% Wire & Cable 17% Electrical & Electronics 2% Consumer 4% Packaging 9% Industrial 20% Misc. 2% HealthCare 2% Transportation 8% Textiles 2% Target Page 85 • Trend toward more affordable housing favors our product 1.5 2.0 2.5 Housing Starts (in million units) 50 year average Market Dynamics Performance Products and Solutions • Ultimate housing recovery presents substantial upside to already record- setting results Source: Historical Data from the US Census Bureau, 2012 estimate is a PolyOne projection. 0.0 0.5 1.0 '87 '89 '91 '94 '96 '98 '00 '02 '04 '06 '08 '10 '12 Page 86 Value Proposition • Premier provider of specialized vinyl and supply chain solutions, leading the industry in innovation and service Transformation Highlights • Management upgrades ensure that each PP&S business Value Proposition and Transformation Highlights Performance Products and Solutions • Management upgrades ensure that each PP&S business maximizes performance • Asset realignment and Lean Six Sigma reduce costs • Strengthened relationship with winning customers • Increased differentiation in all business units > $12B Addressable Market Page 87 Key Differentiators Performance Products and Solutions • Providing application design, material design and / or process design assistance not available from competitors • Capability to improve joint value streams • We are the best innovator in our space • We are the best innovator in our space • Expanding customers’ opportunities by providing innovative materials and marketing ideas • We provide world-class customer service and delivery performance Page 88 13.7% 14.3% 15.5% 9.9% 6.2% 5.4% 2006 2007 2008 2009 2010 2011 WC % of Sales • Best-in-class working capital management and delivery performance • Improved raw material Areas of Focus – Operational Excellence Performance Products and Solutions 2006 2007 2008 2009 2010 2011 89.1% 92.0% 94.2% 93.4% 93.4% 94.0% 2006 2007 2008 2009 2010 2011 On-Time Delivery • Improved raw material positions, sourcing savings • PolyOne pilot site for many LSS and manufacturing excellence programs *As measured to customer request date * Page 89 • reFlexTM Bioplasticizers Applications: Wide variety of flexible vinyl-based products • GeonTM HC for Healthcare � Applications: Medical device housings, specialty tubing � Customer benefits: Withstand aggressive antiseptics Key Innovations Performance Products and Solutions � Applications: Wide variety of flexible vinyl-based products � Customer benefits: Lower carbon footprint, improved productivity • GeonTM SF Super Flow � Applications: Large appliance parts, molded siding panels � Customer benefits: Flame retardancy, detergent resistance Page 90 Critical Imperatives and 2015 Goal Performance Products and Solutions Critical Imperatives • Accelerate innovation - grow in new applications not historically served with vinyl • Drive continuous improvement in manufacturing and working capital efficienciesworking capital efficiencies • Selectively leverage construction recovery 2015 Goal • 9 - 12% return on sales Page 91 Page 92

Certificate of Approval Certificate n°: FR079697-1 Contract n°: 15701960 Revision date: 22 February 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.

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.

Global Compact & fulfilled Communication of Progress (COP) requirements • New Sustainability Strategy overview page including our 2022 AIP ESG metrics • New ESG Performance page with ESG ratings, awards, and certifications • Increased disclosures on carbon emissions, including disclosure of Climate Change Scenario Analysis • Added new Product Stewardship and Chemical Management policies • Enhanced data reporting for Workforce Demographics • Improved social disclosures on human rights, dependent care and special leave and strategic training management 20 21 SUSTAI NA BILI TY REPORT Launching integrated sustainability website in parallel with report Aligned with leading reporting frameworks 6 Released July 2022 E S G R AT I N G S P E R F O R M AN C E E S G AWA R D S AN D C E R T I F I C AT I O N S ESG PER FORMANCE & A WAR DS 84th 3 1 2 7 T R A N S F O R M A T I O N A L O V E R V I E W Avient Protective Materials Dyneema ® RECENT TRANSAC TIONS Acquired Divested $1.45 B $0.95 B 9 Distribution UPDATED CA PI TAL STRUC TURE & LI QUI DI TY • Proceeds from completed sale of Distribution used to pay near-term maturing debt to strengthen balance sheet • Fixed/floating debt ratio of ~55/45 • Proven track record of deleveraging following major acquisitions through strong free cash flow generation • 2022 pro forma net debt/adjusted EBITDA expected to be 3.1x $725 $725 $575 $500 $600 $525 $650 $650 $600 Capital Structure Cas h $544 Undr awn Rev olve r $250 Liquidity $3.15B $2.40B 2030 Notes 2029 Term Loan 2026 Term Loan 2025 Notes 2023 Notes After Dyneema Acquisition After Distribution Divestiture $794M (1) (1) $250M reflects estimated undrawn revolver following the divestiture of Distribution 10 PREVI OUS TR ANSACTIONS Performance Solutions Products & $0.8 B COLOR $1.4 B Acquired (2020)Divested (2019) 11 • Acquisition of Clariant Color business significantly expanded presence in healthcare, packaging and consumer end markets • Strength of portfolio – double-digit annual EBITDA growth since acquisition • $75 million of realized synergies anticipated in 2022 • Acquisition completed on July 1, 2020 for $1.45 billion. Purchase price multiple rapidly declining on strength of business and synergy capture 12 $133 $201 2019PF 2022E 12 Clariant Color EBITDA Growth Purchase Price Multiple 10.8x 7.0x 6.4x 2019PF 2021 2022E w/ Full Synergies (1) (1) 11.9% 16.3% 2019PF 2022E EBITDA Margins (1) CLARIANT COLOR: TRANSFORMATIONAL ACQUISITION ($ in millions) (1) Financial information is pro forma to include a full year of Clariant Color business SUNBELT PVC Resins DSS 20 Acquisitions $4.8B Investment $2.7B of Annual Revenue 5 Divestments $2.3B Proceeds TPE PP&S HISTORI C SPECI AL IZATION THROUGH M& A 13 Distribution DSM Protective Materials BOLT-ON AC QUI SITI ON HISTORY 14 Commercial Resources Operating Income ($ in millions) Operating Margins 259 363 At Acquisition 2022E $40 $139 At Acquisition 2022E 9% 22% At Acquisition 2022E Established Acquisitions (> 7 years) + 40% + 248% + 1300 bps I N V E S T T O G R O W S P E C I A LT Y T R A N SF O R M ATI O N T O D A Y 7% 46% 67% 86% 100% 0% 20% 40% 60% 80% 100% 2005 2010 2019 2021 2022 PF % o f A d ju st e d E B IT D A • Commodity JVs • Distribution • Performance Products & Solutions • Specialty Businesses (1) Adjusted EBITDA is EBITDA excluding corporate costs and special items (2) Pro forma for the acquisition of Dyneema® and divestiture of Distribution (1 ) (2) 15 Healthcare 4% Packaging 8% Consumer 10% Building & Construction 43% Industrial 15% Transportation 14% Energy 4% Telecom. 2% 2006 2022 Pro Forma Healthcare 8% Packaging 23% Consumer 21% Building & Construction 10% Industrial 15% Transportation 9% Energy 4% Telecom. 4% Defense 6% END MAR KET F OCUS ON LESS CYCL IC AL I ND USTRI ES 16 14.8% 17.6% 21.0% 2018 2020 2022 PF 1.8% 2006 15.3% 16.2% 17.0% 2018PF 2020PF 2022E CAI 2.7% 2006 SEM SPEC IA LTY EBI TDA MA RGI N EX PANSION 17 • Portfolio transformation accelerates growth in less cyclical, higher margin end markets • Investments in our composites platform continue to drive margin expansion (1) (1) (1) 2018 and 2020 financial information is pro forma to include a full year of Clariant Color acquisition PORTFOLIO EVOLUTION OVER THE YEARS 18 Adj.

Global Compact & fulfilled Communication of Progress (COP) requirements • New Sustainability Strategy overview page including our 2022 AIP ESG metrics • New ESG Performance page with ESG ratings, awards, and certifications • Increased disclosures on carbon emissions, including disclosure of Climate Change Scenario Analysis • Added new Product Stewardship and Chemical Management policies • Enhanced data reporting for Workforce Demographics • Improved social disclosures on human rights, dependent care and special leave and strategic training management 20 21 SUSTAI NA BILI TY REPORT Launching integrated sustainability website in parallel with report Aligned with leading reporting frameworks 6 Released July 2022 E S G R AT I N G S P E R F O R M AN C E E S G AWA R D S AN D C E R T I F I C AT I O N S ESG PER FORMANCE & A WAR DS 84th 3 1 2 7 T R A N S F O R M A T I O N A L O V E R V I E W Avient Protective Materials Dyneema ® RECENT TRANSAC TIONS Acquired Divested $1.45 B $0.95 B 9 Distribution UPDATED CA PI TAL STRUC TURE & LI QUI DI TY • Proceeds from completed sale of Distribution used to pay near-term maturing debt to strengthen balance sheet • Fixed/floating debt ratio of ~55/45 • Proven track record of deleveraging following major acquisitions through strong free cash flow generation • 2022 pro forma net debt/adjusted EBITDA expected to be 3.1x $725 $725 $575 $500 $600 $525 $650 $650 $600 Capital Structure Cash $544 Undrawn Revolver $250 Liquidity $3.15B $2.40B 2030 Notes 2029 Term Loan 2026 Term Loan 2025 Notes 2023 Notes After Dyneema Acquisition After Distribution Divestiture $794M (1) (1) $250M reflects estimated undrawn revolver following the divestiture of Distribution 10 PREVI OUS TR ANSACTIONS Performance Solutions Products & $0.8 B COLOR $1.4 B Acquired (2020)Divested (2019) 11 • Acquisition of Clariant Color business significantly expanded presence in healthcare, packaging and consumer end markets • Strength of portfolio – double-digit annual EBITDA growth since acquisition • $75 million of realized synergies anticipated in 2022 • Acquisition completed on July 1, 2020 for $1.45 billion. Purchase price multiple rapidly declining on strength of business and synergy capture 12 $133 $201 2019PF 2022E 12 Clariant Color EBITDA Growth Purchase Price Multiple 10.8x 7.0x 6.4x 2019PF 2021 2022E w/ Full Synergies (1) (1) 11.9% 16.3% 2019PF 2022E EBITDA Margins (1) CLARIANT COLOR: TRANSFORMATIONAL ACQUISITION ($ in millions) (1) Financial information is pro forma to include a full year of Clariant Color business SUNBELT PVC Resins DSS 20 Acquisitions $4.8B Investment $2.7B of Annual Revenue 5 Divestments $2.3B Proceeds TPE PP&S HISTORI C SPECI AL IZATION THROUGH M& A 13 Distribution DSM Protective Materials BOLT-ON AC QUI SITI ON HISTORY 14 Commercial Resources Operating Income ($ in millions) Operating Margins 259 363 At Acquisition 2022E $40 $139 At Acquisition 2022E 9% 22% At Acquisition 2022E Established Acquisitions (> 7 years) + 40% + 248% + 1300 bps I N V E S T T O G R O W S P E C I A LT Y T R A N SF O R M ATI O N T O D A Y 7% 46% 67% 86% 100% 0% 20% 40% 60% 80% 100% 2005 2010 2019 2021 2022 PF % o f A d ju st e d E B IT D A • Commodity JVs • Distribution • Performance Products & Solutions • Specialty Businesses (1) Adjusted EBITDA is EBITDA excluding corporate costs and special items (2) Pro forma for the acquisition of Dyneema® and divestiture of Distribution (1 ) (2) 15 Healthcare 4% Packaging 8% Consumer 10% Building & Construction 43% Industrial 15% Transportation 14% Energy 4% Telecom. 2% 2006 2022 Pro Forma Healthcare 8% Packaging 23% Consumer 21% Building & Construction 10% Industrial 15% Transportation 9% Energy 4% Telecom. 4% Defense 6% END MAR KET F OCUS ON LESS CYCL IC AL I ND USTRI ES 16 14.8% 17.6% 21.0% 2018 2020 2022 PF 1.8% 2006 15.3% 16.2% 17.0% 2018PF 2020PF 2022E CAI 2.7% 2006 SEM SPEC IA LTY EBI TDA MA RGI N EX PANSION 17 • Portfolio transformation accelerates growth in less cyclical, higher margin end markets • Investments in our composites platform continue to drive margin expansion (1) (1) (1) 2018 and 2020 financial information is pro forma to include a full year of Clariant Color acquisition PORTFOLIO EVOLUTION OVER THE YEARS 18 Adj.

En apoyo de lo anterior, esperamos que nuestros Proveedores: • suministren a Avient solo metales 3TG obtenidos fuera de zonas de conflicto; • participen en el proceso de diligencia debida de las cadenas de suministro siguiendo un marco de diligencia debida reconocido nacional o internacionalmente; • cuando se les pida, informen a Avient sobre su proceso de diligencia debida y certifiquen que los metales 3TG suministrados a Avient procedentes de los Países cubiertos se obtuvieron fuera de zonas de conflictos; e • informen inmediatamente a Avient de cualquier cambio en la cadena de suministro relacionado con el origen de los metales 3TG o el estado de conflicto Los Proveedores deberán presentar los registros contables a Avient cuando se les solicite