Environmental Management System Certificate of Approval This is to certify that the EMS of Avient Saudi Industries Co. Limited PO Box 2137, Jeddah 22758 Saudi Arabia Has been assessed and found to meet the requirements of ISO 14001:2015 This certificate is valid for the following scope of operations: Production and Supply of Color and Additive Master Batches Authorised by: Stan Wright Director Date of Certificate Issue: 20 December 2022 Certificate Valid Until: 19 December 2025 Recertification audit before 20 November 2025.

© 2024 Avient, All Rights Reserved RESIN (RPET/PET) PRODUCTION Create Value • Increase yield • Expand applications • Improve aesthetics • Reduce energy • rePrize™ IV Builder • Ionix™ Flake Treatment • Optica™ Toners & Colors for Enhanced Recyclability • Joule™ Reheat Additive DISTRIBUTION, RETAIL SALES, CONSUMPTION Enhance Consumer Experience • Improve aesthetics and visual appeal • Extend shelf life • Bolster consumer safety • Improve organoleptics • Ultimate™ UV390 Light Barrier • Lactra™ Light Blocking Additive • Triple A™ Acetaldehyde Scavenger • Amosorb™ Oxygen Scavenger • Optica™ Toners COLLECTION, SORTING, Supply Quality Feedstock with APR* Recognized Solutions • Expand end-use applications • Reduce downcycling • Improve color stability • Ultimate™ UV390 Light Barrier • Capture™ Oxygen Scavenger PREFORM MOLDING & BOTTLE BLOWING Promote Process Optimization • Reduce energy • Reduce bottle blow-outs • Mitigate stress cracking • Improve mechanical and dimensional stability • Increase throughput • Eze™ Slip AgentPET RECYCLING ECO-SYSTEM PREFORM MOLDING & BOTTLE BLOWING COLLECTION, SORTING, DISTRIBUTION, RETAIL SALES, CONSUMPTION RESIN (RPET/PET) PRODUCTION * APR - Association of Plastics Recyclers

Cesa™ Non-PFAS Process Aid for Extrusion: for use in polyethylene (PE) and polypropylene (PP) applications, it reduces friction between the polymer and the metal during extrusion comparable to a traditional processing aid but is formulated without fluoropolymers which may be classifiable as per- and polyfluorinated substances (PFAS) and will be presented during Avient’s technical seminar at NPE, “PFAS Alternatives: 2024 and Beyond,” by Sean Bernhardt, Senior Research and Development Manager, Color, Additives, & Inks, Americas at Avient, on May 7 at 3 p.m. and May 8 at 1 p.m. About Avient   Avient Announces Quarterly Dividend...

MAIA+ N° rapport :223-2023-000066-FR 10898066 0.5 jour Date Début / Fin :04/11/2022 /04/11/2022 PolyOne France - site de Saint Ouen l'Aumône 1 /11 ATTESTATION DE RECONNAISSANCE Attribué à PolyOne France - site de Saint Ouen l'Aumône 14 avenue de l'Eguillette / ZA du Vert Galant 95310 - SAINT OUEN L'AUMONE - FRANCE Bureau Veritas Certification certifie que les prestations de l’entreprise susmentionnée ont été évaluées et jugées conformes aux caractéristiques énoncées dans le décret en vigueur à la date d’édition du présent certificat : Décret n°2021-461 du 16 avril 2021 relatif à la prévention des pertes de granulés de plastiques industriels dans l’environnement Sous réserve du respect des caractéristiques vérifiées, cette attestation est valable jusqu’au : 16/02/2026 Date originale : 17/02/2023 Attestation n°: 223-2023-000066-FR Date : 17/02/2023 Affaire n°: 10898066 Laurent CROGUENNEC - Président Adresse de l’organisme certificateur : Bureau Veritas Certification France Le Triangle de l'Arche - 9 Cours du Triangle - 92937 Paris La Défense Des informations supplémentaires concernant le périmètre de cette attestation ainsi que l'applicabilité des exigences du décret peuvent être obtenues en consultant l'organisme. Pour vérifier la validité de ce certificat, vous pouvez téléphoner au : + 33 (0)1 41 97 00 60

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June 1, 2021 June 1, 2021 Rose, Vice President, Corporate Communications, Avient Corporation, +1 440-930-3162, kyle.rose@polyone.com

8:00 a.m. to 1:00 p.m. Investor Relations Contact: Giuseppe (Joe) Di Salvo, Vice President, Treasurer and Investor Relations, Avient Corporation, +1 440-930-1921, giuseppe.disalvo@avient.com; Media Contact: Kyle G. Rose, Vice President, Corporate Communications, Avient Corporation, +1 440-930-3162, kyle.rose@avient.com

CLEVELAND, Sept. 1, 2022 /PRNewswire/ -- Avient Corporation (NYSE: AVNT), a leading provider of specialized and sustainable material solutions, has September 1, 2022 Avient Announces Second Quarter 2022 Results

Avient Announces Third Quarter 2022 Results CLEVELAND, Nov. 1, 2022 /PRNewswire/ -- Avient Corporation (NYSE: AVNT), a leading global provider of specialized and sustainable material solutions November 1, 2022