Handelsregister B des Amtsgerichts Mannheim Nummer der Firma: Seite 1 von 2 HRB 731450 Nummer der Eintragung a) Firma b) Sitz, Niederlassung, inländische Geschäftsanschrift, empfangsberechtigte Person, Zweigniederlassungen c) Gegenstand des Unternehmens Grund- oder Stammkapital a) Allgemeine Vertretungsregelung b) Vorstand, Leitungsorgan, geschäftsführende Direktoren, persönlich haftende Gesellschafter, Geschäftsführer, Vertretungsberechtigte und besondere Vertretungsbefugnis Prokura a) Rechtsform, Beginn, Satzung oder Gesellschaftsvertrag b) Sonstige Rechtsverhältnisse a) Tag der Eintragung b) Bemerkungen 1 2 3 4 5 6 7 1 a) PolyOne S.à r.l., Germany Branch Gaggenau Geschäftsanschrift: Adolf-Dambach-Straße 2, 76571 Gaggenau Zweigniederlassung der "PolyOne S.à r.l." mit Sitz in Pommerloch / Luxemburg (Registre de commerce et des sociétés B226205) c) Den Vertrieb und den Großhandel von Fertigerzeugnissen, die unter anderem aus ein- und mehrschichtigen thermoplastischen Platten, Polymermischungen und Farbkonzentraten sowie klaren thermogeformten Kunststoffbehältern bestehen, wobei die Tätigkeiten für die das Gesetz besondere Qualifikationen oder Erlaubnisse vorschreibt, die von der Zweigniederlassung nicht erfüllt oder gehalten werden, ausdrücklich ausgeschlossen sind. 12.000,00 EUR Jeder Geschäftsführer vertritt einzeln. Gesellschaft mit beschränkter Haftung nach luxemburgischem Recht (société à responsibilité limitée) Gesellschaftsvertrag vom 04.07.2018. 10.09.2018 Kretzler 2 b) Fielding, Gary J., Chesire / Vereinigtes Königreich, *20.09.1963 Potoczny, Zaneta Gabriela, Mersch / Luxemburg, *17.10.1974 Ausgeschieden als Machin, Geneviéve Elizabeth, Luxemburg / Luxemburg, *31.03.1972 17.03.2020 Knauf Abruf vom 27.12.2021 17:13 Handelsregister B des Amtsgerichts Mannheim Nummer der Firma: Seite 2 von 2 HRB 731450 Nummer der Eintragung a) Firma b) Sitz, Niederlassung, inländische Geschäftsanschrift, empfangsberechtigte Person, Zweigniederlassungen c) Gegenstand des Unternehmens Grund- oder Stammkapital a) Allgemeine Vertretungsregelung b) Vorstand, Leitungsorgan, geschäftsführende Direktoren, persönlich haftende Gesellschafter, Geschäftsführer, Vertretungsberechtigte und besondere Vertretungsbefugnis Prokura a) Rechtsform, Beginn, Satzung oder Gesellschaftsvertrag b) Sonstige Rechtsverhältnisse a) Tag der Eintragung b) Bemerkungen 1 2 3 4 5 6 7 3 a) Firma geändert; nun: Avient S.à r.l., Germany Branch Daten der Hauptniederlassung geändert; nun: Zweigniederlassung der "Avient S.à r.l." mit Sitz in Pommerloch / Luxemburg (Registre de commerce et des sociétés B226205) Ausgeschieden als Fielding, Gary J., Chesire / Vereinigtes Königreich, *20.09.1963 Merklein, Norbert, Kronberg im Taunus, *03.05.1964 Der geänderte Gesellschaftsvertrag der Hauptniederlassung wurde zum Handelsregister eingereicht. 23.12.2021 Georg Abruf vom 27.12.2021 17:13

Information Systems Use Policy Effective date: September 1, 2021 Available on the Avient Ethics & Corporate Policies Page on the Loop Confidential 2 Avient IT Department Information Systems Use Policy September 1, 2021 Table of Contents Purpose .......................................................................................................................................................... 3 Scope.............................................................................................................................................................. 3 Usage ............................................................................................................................................................. 3 Expectations for Use of Information Systems ........................................................................................... 3 Prohibited Uses of Information Systems ................................................................................................... 3 Personal Use .............................................................................................................................................. 4 Social Media .............................................................................................................................................. 4 Enforcement and Monitoring ......................................................................................................................... 4 Questions and Additional Information .......................................................................................................... 5 Document Change and Review History ........................................................................................................ 5 Appendix A: Definitions................................................................................................................................ 6 Confidential 3 Avient IT Department Information Systems Use Policy September 1, 2021 PURPOSE This Information Systems Use Policy (“Policy”) establishes acceptable and prohibited uses of Avient’s Information Systems to protect Avient and its employees and affiliates from both intentionally and unintentionally harmful actions by Users. Confidential 4 Avient IT Department Information Systems Use Policy September 1, 2021 Additionally, the following Information Systems uses are prohibited unless specifically authorized by Avient or authorized Avient IT representatives: • Revealing account usernames, passwords, or other Personal Data to others or allowing use of Information Systems by others, including family and other household members; • Conducting any form of network monitoring that could intercept data not intended for the recipient User; • Circumventing User authentication or security of any Information Systems; or • Using personal devices to access Confidential Data or connect to Information Systems. Confidential 5 Avient IT Department Information Systems Use Policy September 1, 2021 QUESTIONS AND ADDITIONAL INFORMATION For additional details regarding cybersecurity and incidence response, please refer to Avient’s Cyber and Data Incident Response Policy.

Our free cash flow supports shareholder value creation through investing in R&D for organic growth, completing bolt-on acquisitions, and returning cash to shareholders via our dividend program and opportunistic share repurchases. 18 1. Such is the case with the Clariant Masterbatch acquisition, where strong free cash flow will allow us to de-lever quickly. 19 AVIENT IS MODESTLY LEVERED 1. SEGMENT HIGHLIGHTS 37% 22% 14% Building & Electrical & C O L O R , A D D I T I V E S & I N K S 2020 PF REVENUE | $2 .0 BILLION $9 $310 2.0% 15.5% 2020 figures Pro forma estimates for acquisition of the Clariant Masterbatch business 32% 39% Latin America END MARKET REGION EBITDA DOLLAR & MARGIN 24 59% 18% Wire & Cable(1) 25% Electrical & 14% Building & S P E C I A LT Y E N G I N E E R E D M AT E R I A L S 2020E REVENUE | $685 MILLION 0.9% 16.8% END MARKET REGION EBITDA DOLLAR & MARGIN 25 (1) Approximately 50% of Wire and Cable sales are associated with Fiber Optic Cabling 30% 24%Packaging Electrical & Building & 1% 79% Latin America END MARKET REGION EBITDA DOLLAR & MARGIN DI S TR IBU T I ON 2020E REVENUE | $1 .05 B ILL ION $20 $65 2.9% 6.2% K E Y S U P P L I ER S 26 AMERICAS EUROPE ASIA 26% 13% 16% Building & 5% Electrical & 35% 14%Healthcare 17% Building & Electrical & 32% 26% 12% Building & Electrical & 2020 figures Pro forma estimates for acquisition of the Clariant Masterbatch business TOTA L C O M PA N Y R E G I O N A L S A L E S BY END MARKET (58% of sales) (25% of sales) (17% of sales) 27

Pro Forma Financial Information The Company acquired Avient Protective Materials (“Dyneema”) on September 1, 2022 (the “Acquisition Date”) and sold the Distribution segment on November 1, 2022. To provide comparable results, the company references “pro forma” financial metrics, which include the business results of Avient Protective Materials for periods prior to the Acquisition Date, as if the transaction occurred on January 1, 2021 and reflect Distribution as a discontinued operation. GUIDANCE 12 14.8% 15.8% Adjusted EBITDA Margin % Better-than-expected margins driven by: • Resilient demand for composites and sustainable solutions which improved mix of higher margin applications • Deceleration of raw material inflation • Cost reduction activities Q1 EBITDA BRIDGE 13 $ millions CAI: Price / Mix 19) Inflation (4) SEM: Price / Mix 6) Inflation (4) Net Price Benefit 17) Wage and Energy Inflation (13) Cost Reductions 8) FX (6) Q1 2023 Actual $134) Adjusted EBITDA Q1 2022 Pro Forma $ 176) Demand (48) • Weak demand conditions in-line with previous expectations • Pricing continues to cover inflation of raw materials, wages and energy U.S. & Canada 38% 17% Q1 2023 SEGMENT, END MARKET AND GEOGRAPHY GEOGRAPHY REVENUESEGMENT FINANCIALS 23% Building and 6%Telecommunications END MARKET REVENUE (1) Total company sales and adjusted EBITDA of $846M and $134M, respectively, include intercompany sales eliminations and corporate costs $537M $91M $310M $64M Sales EBITDA Specialty Engineered Materials Color Additives and Inks $134M$846M (1) 14 Q1 2023 SALES BY REGION Yo Y C H A N G E ( E X C L .

TECHNICAL PROPERTIES(1) TEST METHOD Edgetek™ ET8900-0011 HI UV NAT Edgetek™ ET8900-0012 HI UV White Edgetek™ ET8900-0013 HI UV Black Physical Density/Specific Gravity ASTM D792 1.13 g/cm3 1.15 g/cm3 1.13 g/cm3 Molding Shrinkage - Flow ASTM D955 1.4–2% 1.4–2% 1.4–2% Mechanical Tensile Strength (Yield) ASTM D638 5,900 psi 5,800 psi 5,800 psi Tensile Modulus(2) ASTM D638 169,000 psi 161,087 psi 176,000 psi Flexural Modulus(3) ASTM D790 187,000 psi 190,985 psi 188,000 psi Impact Notched Izod Impact 73°F (23°C), 0.125 in ASTM D256A 17.3 ft-lb/in 16.5 ft-lb/in 16.5 ft-lb/in Notched Izod Impact -22°F (-30°C), 0.125 in ASTM D256A 3.2 ft-lb/in 3.0 ft-lb/in 3.3 ft-lb/in Thermal (HDT) 66 psi (0.45 MPa), 0.125 in ASTM D648 121°C 135°C 129°C NORTH AMERICA GRADES (1) Data based on single lot of lab generated samples.

Headquarters, R&D, Manufacturing Fiber-Line LLC 3050 Campus Drive Hatfield, PA 19440 +1 215.997.9181 Manufacturing Operations Fiber-Line LLC 280 Performance Drive SE Hickory, NC 28602 +1 828.326.8700 European Headquarters, Operations, Sales Office Fiber-Line International B.V.

WET GRIP TECHNOLOGY PROVIDES POWERFUL SOLUTION FOR SURFCO HAWAII © 2021, All Rights Reserved Avient Corporation, 33587 Walker Road, Avon Lake, Ohio USA 44012 1 Wax Mat® is a trademark of SurfCo Hawaii, Inc. THE IMPACT The launch of the Wax Mat®1 grip tape introduced a fresh alternative to wax for wet grip to surfboard decks, helping to further differentiate SurfCo.

RS7900-0001 30N RS7900-0001 45N RS7900-0001 60N RS7900-0001 70N Gen 1 Biomass Content (%) 35% 35% 35% 35% Hardness, Shore A 30A 45A 60A 70A Specific Gravity 1.0 1.1 1.1 1.1 50% Modulus, PSI 103 163 212 313 100% Modulus, PSI 127 192 247 355 Tensile Strength, PSI 564 759 920 1115 Elongation, % 699 692 712 727 Tear Strength, PLI 61 86 114 138 OM Substrate PP PP PP PP reSound™ BIO 7900 Series Copyright © 2023, Avient Corporation. This literature shall NOT operate as permission, recommendation, or inducement to practice any patented invention without permission of the patent owner. 1.844.4AVIENT www.avient.com RS2800-0001 30N RS2800-0001 45N RS2800-0001 60N RS2800-0001 70N Gen 1 Biomass Content (%) 50–60% 50–60% 50–60% 50–60% Hardness, Shore A 30A 45A 60A 70A Specific Gravity 0.85 0.85 0.87 0.86 50% Modulus, PSI 111 167 256 378 100% Modulus, PSI 137 203 301 430 Tensile Strength, PSI 514 807 1089 1118 Elongation, % 672 735 709 644 Tear Strength, PLI 68 102 144 166 OM Substrate PP PP PP PP reSound™ BIO 2800 Series

29/6/2021 Formulario de Impresión de Constancia de Inscripción https://seti.afip.gob.ar/padron-puc-constancia-internet/ConsultaConstanciaAction.do 1/1 ADMINISTRACION FEDERAL DE INGRESOS PUBLICOS CONSTANCIA DE INSCRIPCION  AVIENT ARGENTINA S.A.

Guided by their initiative to develop capabilities that provide additional protection for soldiers while reducing time and logistic requirements,1 the U.S. With our hardware fabrication capabilities and Avient’s knowledge of composite ballistic protection technology, we were able to create modular systems that reduce time and logistic requirements for our brave soldiers.” 1 https://www.erdc.usace.army.mil/Missions/Military-Engineering/Deployable-Force-Protection-Demo/ To learn more about ballistic resistant solutions from Avient, visit avient.com or click to request a quote.