000870.E/24.R Würzburg, 23.05.2024 Benjamin Kirchgeßner Zertifizierungsstelle Zertifikat Die SKZ - Cert GmbH bescheinigt dem Unternehmen Avient Th. Dieses Zertifikat ist gültig vom: 23.05.2024 bis: 19.05.2027 Zertifikat Nr.: 000870.E/24.R Würzburg, 23.05.2024 Benjamin Kirchgeßner Zertifizierungsstelle Anlage zu Zertifikat Nr.: 000870.E/24.R Avient Th. Bergmann GmbH Adolf-Dambach-Str. 2-4 76571 Gaggenau c/o Avient ECCOH High Performance Solutions GmbH Oldendorfer Straße 9, 49324 Melle Produktion von technischen Thermoplasten

Bourg-en-Bresse Date d'immatriculation 18/09/2018 Dénomination ou raison sociale Avient Sàrl Forme juridique Société à responsabilité limitée d'un Etat membre de la CE ou partie à l'accord sur l'Espace économique européen Capital social 12 000,00 Euros Pays, lieu et numéro d'immatriculation B226205 Registre de commerce et des sociétés Adresse du siège 19 route de Bastogne 9638 Pommerloch (LUXEMBOURG) Activités principales Vente de produits en matière plastique ou à base de matières plastiques. achat, vente, importation et négoce en général de tous produits en matières plastiques ou à base de matières plastiques Durée de la personne morale Durée illimitée Date de clôture de l'exercice social 31 décembre GESTION, DIRECTION, ADMINISTRATION, CONTROLE, ASSOCIES OU MEMBRES Nom, prénoms POTOCZNY Zaneta Gabriela Date et lieu de naissance Le 17/10/1974 à JAWORZNO (POLOGNE) Nationalité Polonaise Domicile personnel 65 rue de Colmar berg L-7525 MERSCH (LUXEMBOURG) Nom, prénoms PALM Christophe Date et lieu de naissance Le 16/05/1963 à Eupen (BELGIQUE) Nationalité Belge Domicile personnel Gruss Strooss 35 Apartement 21 9991 Weiswarnpach (LUXEMBOURG) Nom, prénoms KRONIMUS Holger Hans Date et lieu de naissance Le 26/01/1968 à Vallendar (ALLEMAGNE) Nationalité Allemande Domicile personnel Schulstrasse 4 56206 Hilgert (ALLEMAGNE) Nom, prénoms MERKLEIN Nobert Date et lieu de naissance Le 03/05/1964 à KELHEIM (ALLEMAGNE) Nationalité Française Domicile personnel Schiffackerweg 2 4340 Rheinfelden (SUISSE) Responsable en France Nom, prénoms KIEN Eric René Date et lieu de naissance Le 09/07/1961 à Clermont-Ferrand (63) Nationalité Française Domicile personnel 705 Chemin de l'Arête 74290 Menthon-Saint-Bernard https://www.infogreffe.fr/controle https://www.infogreffe.fr/controle/verif? Bourg-en-Bresse - 22/12/2021 - 10:38:15 page 2/2 RENSEIGNEMENTS RELATIFS A L'ACTIVITE ET AU PREMIER ETABLISSEMENT IMMATRICULE EN FRANCE Adresse de l'établissement La Vavrette Route Nationale 75 Bp 26 01250 Tossiat Nom commercial AVIENT Activité(s) exercée(s) Vente de produits en matière plastique ou à base de matières plastiques. achat, vente, importation et négoce en général de tous produits en matières plastiques ou à base de matières plastiques Date de commencement d'activité 02/08/2018 Origine du fonds ou de l'activité Création Mode d'exploitation Exploitation directe Le Greffier FIN DE L'EXTRAIT

ROL ÚNICO TRIBUTARIO ROL ÚNICO TRIBUTARIO NOMBRE O RAZÓN SOCIAL AVIENT CHILE SPA DIRECCIÓN PRINCIPAL (CASA MATRIZ) CAMINO A MELIPILLA 15170 MAIPU RUT 77038524-5 N° SERIE 202104473560 FECHA EMISIÓN 15/06/2021 RUT USUARIO CÉDULA 15334421-3 USUARIO CÉDULA EDUARDO ANDRES GONZALEZ NAVARRO Recuerde, no procede el derecho a crédito fiscal por adquisición de bienes o utilización de servicios que no digan relación con el giro o actividad del contribuyente.

Microsoft Word - Avient - Taiwan Sales Terms and Conditions (Avient clean 10-15-24) 1 TERMS AND CONDITIONS THESE TERMS AND CONDITIONS GOVERN THE SALE OF PRODUCTS TO ANOTHER (“BUYER”) BY AVIENT CORPORATION AND ITS AFFILIATES (“SELLER”). 條款與條件 下列條款與條件適用於 AVIENT 公司及其位於臺灣之 關係企業（下稱「賣方」）向他方（下稱「買方」） 之產品銷售。 若買方轉 售產品，買方同意遵守 www.avient.com/terms 上之 《關於買方轉售 Avient 產品之條款與條件》。

Board-level committee Avient’s Board recently collectively reviewed its role, and the roles of the Avient Board Committees, in sustainability and ESG. Indicate whether your organization undertakes this fuel application Consumption of fuel for the generation of electricity No Consumption of fuel for the generation of heat No Consumption of fuel for the generation of steam No Consumption of fuel for the generation of cooling No Consumption of fuel for co-generation or tri-generation No C8.2c (C8.2c) State how much fuel in MWh your organization has consumed (excluding feedstocks) by fuel type. Avient CDP Climate Change Questionnaire 2021 Tuesday, August 3, 2021 85 In all of its activities, Avient puts high emphasis on environmental protection and safety.

They turned to Avient’s panels as a smarter alternative to traditional materials. Avient makes no warranties or guarantees respecting suitability of either Avient’s products or the information for your process or end-use application. YOUR NEXT MOVE https://www.avient.com/composites Sources • Lucintel Market Research Report (2024) • Prefab Modular Smart Market Report (2020) • Modular Construction Research Report MBI • McKinsey & Co.

Speed to market is essential today, and Avient plays a crucial role in our customers’ success. We are Avient. Free Cash Flow Calculation Year Ended Cash provided (used) by operating activities $ 221.6 Capital expenditures (63.7) Free Cash Flow 157.9 Payment of post-acquisition date earnout liability 38.1 Taxes paid on gain on divestiture 142.0 Adjusted Free Cash Flow $ 338.0 Free Cash Flow Calculation Total Discontinued Operations Continuing Operations Cash provided by operating activities $ 300.8 $ 74.4 $ 226.4 Capital expenditures 81.7 14.1 67.6 Free Cash Flow $ 219.1 $ 60.3 $ 158.8 Avient Q4 Earnings and 2021 Outlook.pdf Avient February IR Presentation.pdf Avient IR Presentation - Goldman Sachs and Morgan Stanley - Website.pdf Avient Q4 Earnings and 2021 Outlook.pdf Avient Q4 Earnings and 2021 Outlook.pdf Avient Q4 Earnings and 2021 Outlook.pdf Avient Q4 Earnings and 2021 Outlook.pdf Avient Q4 Earnings and 2021 Outlook.pdf 2.5.21 IR Deck Attachments clean

Use of Non-GAAP Measures Page 3 -150.00% -50.00% 50.00% 150.00% 250.00% 350.00% PolyOne S&P 500 Strategy and Execution Drive Results Page 4 All time closing high of $29.48 August 1, 2013 • 15 consecutive quarters of double digit EPS growth • 42% CAGR adjusted EPS expansion 2006-2012 • YTD stock price has increased 42% versus 20% growth in the S&P • 275% increase in market cap: $0.7b $2.6b since 2006 The World’s Premier Provider of Specialized Polymer Materials, Services & Solutions Four Pillar Strategy Page 5 PP&S 15% Specialty Distribution 25% 0.12 0.27 0.21 0.13 0.68 0.82 1.00 2.50 $0.00 $0.25 $0.50 $0.75 $1.00 $1.25 $1.50 $1.75 $2.00 $2.25 $2.50 2006 2007 2008 2009 2010* 2011* 2012* 2015 Target Ad ju st ed E ar ni ng s P er S ha re Appliance 6% Building & Construction 13% Wire & Cable Electrical & Electronics 4% Consumer Packaging 18% Industrial 10% Misc. 5% HealthCare Transportation 16% Textiles 1% United States 70% Europe 14% Canada 8% Asia 5% Latin America 3% 2012 Revenues: $4.0 Billion* End Markets* 2012 Revenues: $4.0 Billion* EPS Page 6 * Pro Forma includes FY2012 results for Spartech (11/03/12 YE) and Glasforms & excludes discontinued operations PolyOne At A Glance * Restated to exclude discontinued operations Old PolyOne Transformation *Operating Income excludes corporate charges and special items **Pro Forma results include Spartech and Glasforms acquisitions, Specialty Coatings reclass and excludes discontinued operations 2% 34% 43% 45% 60% 65- 75% 0% 20% 40% 60% 80% 100% 2005 2008 2010 2012 2012 PF** 2015 % o f O pe ra tin g In co m e* JV's PP&S Distribution Specialty Specialty OI $5M $46M $87M $114M $150M Target Mix Shift Highlights Specialty Transformation 2015 Target Page 7 2006 H1 2013 2015 Where we were Where we are Organic Consolidated Target 1) Operating Income % Specialty: Global Color, Additives & Inks 1.7% 12.7% 12.6% 12 – 16% Global Specialty Engineered Materials 1.1% 10.9% 9.2% 12 – 16% Designed Structures & Solutions — — 4.4% 8 – 10% Performance Products & Solutions 5.4% 8.1% 8.2% 9 – 12% Distribution 2.6% 6.1% 6.1% 6 – 7.5% 2) Specialty Platform % of Operating Income 6.0% 62% 65 – 75% 3) ROIC* (after-tax) 5.0% 9.4% 15% 4) Adjusted EPS Growth N/A 26% Double Digit Expansion Proof of Performance & 2015 Goals *ROIC is defined as TTM adjusted OI divided by the sum of average debt and equity over a 5 quarter period Page 8 *Percentage of Specialty Platform revenue from products introduced in last five years 19.5% 46.5% 2006 Q2 2013 $20.3 $44.7 2006 TTM Q2'13 14.3% 31.1% 2006 Q2 2013 Research & Development Spending Specialty Platform Vitality Index Progression* Innovation Drives Earnings Growth ($ millions) Specialty Platform Gross Margin % Page 9 We are Experts in Polymer Science and Formulation  Polymer Science  Formulation  Chemistry  Processing Inputs  Base Resins  Additives  Modifiers  Colorants Specialized Polymer Materials, Services, and Solutions Expertise Satisfied Consumers PolyOne Customer Innovative Products & Services  Marketplace Demands  Performance Requirements  Value Drivers Page 10 Positioned for Strong Growth 2015 Target Rev: $5B Adj.

Use of Non GAAP Measures Page 3 -150.00% -100.00% -50.00% 0.00% 50.00% 100.00% 150.00% 200.00% 250.00% 300.00% 350.00% PolyOne S&P 500 Strategy and Execution Drive Results – Since 2006: Page 4 All time closing high of $26.63 May 28, 2013 • 14 consecutive quarters of double digit EPS growth • 380 basis point increase in return on sales • 300% share price expansion • 300% increase in total shareholder return • 42% CAGR EPS expansion • $1.8 billion increase in market cap • Track record of successful acquisitions The World’s Premier Provider of Specialized Polymer Materials, Services & Solutions Four Pillar Strategy Page 5 2013 Portfolio Transformation Highlights • Substantial organic mix improvement drives 29% increase in first quarter EPS – 14th consecutive quarter of double-digit EPS growth • Completed acquisition of Spartech • Announced the creation of a new Specialty segment – Designed Structures and Solutions • Completed the sale of our non-core resin assets • Realigned our Specialty Coatings business into our GCAI segment Page 6 PP&S 15% Specialty Distribution 25% 0.12 0.27 0.21 0.13 0.68 0.82 1.00 2.50 $0.00 $0.25 $0.50 $0.75 $1.00 $1.25 $1.50 $1.75 $2.00 $2.25 $2.50 2006 2007 2008 2009 2010* 2011* 2012* 2015 Target Ad ju st ed E ar ni ng s P er S ha re Appliance 6% Building & Construction 13% Wire & Cable Electrical & Electronics 4% Consumer Packaging 18% Industrial 10% Misc. 5% HealthCare Transportation 16% Textiles 1% United States 70% Europe 14% Canada 8% Asia 5% Latin America 3% 2012 Revenues: $4.0 Billion* End Markets* 2012 Revenues: $4.0 Billion* EPS Page 7 * Pro Forma includes FY2012 results for Spartech (11/03/12 YE) and Glasforms & excludes discontinued operations PolyOne At A Glance * Restated to exclude discontinued operations Old PolyOne Transformation *Operating Income excludes corporate charges and special items **Pro Forma results include Spartech and Glasforms acquisitions, Specialty Coatings reclass and excludes resin assets 2% 34% 43% 45% 60% 65 – 75% 0% 20% 40% 60% 80% 100% 2005 2008 2010 2012 2012PF** 2015 % o f O pe ra tin g In co m e* JV's PP&S Distribution Specialty Specialty OI $5M $46M $87M $114M $150M Target Mix Shift Highlights Specialty Transformation 2015 Target Page 8 2007 Q1 2013 2015 Target 1) Operating Income % Specialty: Global Color, Additives & Inks 4.6% 11.7% 12 – 16% Global Specialty Engineered Materials 1.3% 10.1% 12 – 16% Designed Structures & Solutions -- 4.6% 8 – 10% Performance Products & Solutions 6.1% 8.1% 9 – 12% Distribution 3.0% 6.0% 6 – 7.5% 2) Specialty Platform % of Operating Income 20% 60% 65 – 75% 3) ROIC* (after-tax) 7% 9.2% 15% 4) Adjusted EPS Growth N/A 29% Double Digit Expansion Proof of Performance & 2015 Goals *ROIC is defined as TTM adjusted OI divided by the sum of average debt and equity over a 5 quarter period Page 9 *Percentage of Specialty Platform revenue from products introduced in last five years 19.5% 50.0% 2006 Q1 2013 $20.3 $41.9 2006 2012 14.3% 27.8% 2006 Q1 2013 Research & Development Spending Specialty Platform Vitality Index Progression* Innovation Drives Earnings Growth ($ millions) Specialty Platform Gross Margin % Page 10 We are Experts in Polymer Science and Formulation  Polymer Science  Formulation  Chemistry  Processing Inputs  Base Resins  Additives  Modifiers  Colorants Specialized Polymer Materials, Services, and Solutions Expertise Satisfied Consumers PolyOne Customer Innovative Products & Services  Marketplace Demands  Performance Requirements  Value Drivers Page 11 Positioned for Strong Growth 2015 Target Rev: $5B Adj.

Use of Non-GAAP Measures Page 3 -150.00% -50.00% 50.00% 150.00% 250.00% 350.00% PolyOne S&P 500 Page 4 All time high of $32.32 October 21st, 2013 • 16 consecutive quarters of double digit EPS growth • 42% CAGR adjusted EPS expansion 2006-2012 • YTD stock price has increased 56% versus 22% growth in the S&P • Six fold increase in market cap: $0.5b $3.0b Strategy and Execution Drive Results PP&S 15% Specialty 60% Distribution 25% 0.12 0.27 0.21 0.13 0.68 0.82 1.00 2.50 $0.00 $0.25 $0.50 $0.75 $1.00 $1.25 $1.50 $1.75 $2.00 $2.25 $2.50 2006 2007 2008 2009 2010* 2011* 2012* 2015 Target Ad ju st ed E ar ni ng s P er S ha re Appliance 6% Building & Construction 13% Wire & Cable Electrical & Electronics 4% Consumer Packaging 18% Industrial 10% Misc. 5% HealthCare Transportation 16% Textiles 1% United States 70% Europe 14% Canada 8% Asia 5% Latin America 3% 2012 Revenues: $4.0 Billion* End Markets* 2012 Revenues: $4.0 Billion* EPS Page 5 * Pro Forma includes FY2012 results for Spartech (11/03/12 YE) and Glasforms & excludes discontinued operations PolyOne At A Glance * Restated to exclude discontinued operations Old PolyOne Transformation *Operating Income excludes corporate charges and special items 2% 34% 43% 63% 65- 75% 0% 20% 40% 60% 80% 100% 2005 2008 2010 YTD 2013 2015 % o f O pe ra tin g In co m e* JV's PP&S Distribution Specialty Specialty OI $5M $46M $87M $153M Target Mix Shift Highlights Specialty Transformation 2015 Target Page 6 2006 YTD 2013 2015 Where we were Where we are Organic Consolidated Target 1) Operating Income % Specialty: Global Color, Additives & Inks 1.7% 12.8% 12.8% 12 – 16% Global Specialty Engineered Materials 1.1% 10.8% 8.9% 12 – 16% Designed Structures & Solutions — — 5.0% 8 – 10% Performance Products & Solutions 5.5% 8.0% 8.2% 9 – 12% Distribution 2.6% 6.1% 6 – 7.5% 2) Specialty Platform % of Operating Income 6.0% 63% 65 – 75% 3) ROIC* (after-tax) 5.0% 9.4% 15% 4) Adjusted EPS Growth N/A 28% Double Digit Expansion Proof of Performance & 2015 Goals *ROIC is defined as TTM adjusted OI divided by the sum of average debt and equity over a 5 quarter period Page 7 *Percentage of Specialty Platform revenue from products introduced in last five years 19.5% 44.0% 2006 Q3 2013 $20.3 $46.6 2006 TTM Q3'13 14.3% 31.0% 2006 Q3 2013 Research & Development Spending Specialty Platform Vitality Index Progression* Innovation Drives Earnings Growth ($ millions) Specialty Platform Gross Margin % Page 8 We are Experts in Polymer Science and Formulation  Polymer Science  Formulation  Chemistry  Processing Inputs  Base Resins  Additives  Modifiers  Colorants Specialized Polymer Materials, Services, and Solutions Expertise Satisfied Consumers PolyOne Customer Innovative Products & Services  Marketplace Demands  Performance Requirements  Value Drivers Page 9 Positioned for Strong Growth 2015 Target Rev: $5B Adj.