CLEVELAND, Oct. 30, 2017 /PRNewswire/ -- PolyOne Corporation (NYSE: POL), a premier provider of specialized polymer materials, services and solution October 30, 2017 PolyOne Declares Quarterly Dividend Increase of 30%, Announces Three-Year Dividend Increase Plan

ECert - 2023-11-22T154408.223.pdf Page 1 of 10 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. This is to confirm that the Environmental, Health, Safety and Security Management System of: Avient Corporation HQ 33587 Walker Road The Environmental, Health, Safety and Security Management System is applicable to: Certificate No: 65536 Effective Date: 29 September 2023 Expiration Date: 28 September 2026 Revision Date: 22 November 2023 Dominic Townsend, President CORPORATE SUPPORT ACTIVITIES, DESIGN, MANUFACTURE AND DISTRIBUTION OF COLOUR AND ADDITIVE CONCENTRATES, THERMOPLASTIC RESINS AND PELLETS, SPECIALTY COMPOUNDS AND COLORANTS. Box 5882 Riyadh, Kingdom 11432 Saudi Arabia Activity: Design & Manufacture of Color, Additive Concentrate & Specialty Activity: Design and Manufacture of Color and Additive Concentrates, Page 9 of 10 Facility: Avient Corporation - Tangerang, Indonesia Gatot Subroto KM. 4 Jalan Kalisabi No. 1 Building 37 Tangerang, Banten 15138 Indonesia Facility: Avient Corporation - Tao Yuan, Taiwan No. 30, Hsing Pang Road Tao Yuan, -- - 330457 Taiwan Facility: Avient Corporation - Toluca, Mexico AV.

ECert - 2023-11-22T151036.517.pdf Page 1 of 10 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. This is to certify that the Environmental Management System of: Avient Corporation HQ 33587 Walker Road The Environmental Management System is applicable to: Certificate No: 65537 Effective Date: 29 September 2023 Expiration Date: 27 September 2026 Revision Date: 22 November 2023 Dominic Townsend, President CORPORATE SUPPORT ACTIVITIES, DESIGN, MANUFACTURE AND DISTRIBUTION OF COLOUR AND ADDITIVE CONCENTRATES, THERMOPLASTIC RESINS AND PELLETS, SPECIALTY COMPOUNDS AND COLORANTS. Box 5882 Riyadh, Kingdom 11432 Saudi Arabia Activity: Design & Manufacture of Color, Additive Concentrate & Specialty Activity: Design and Manufacture of Color and Additive Concentrates, Page 9 of 10 Facility: Avient Corporation - Tangerang, Indonesia Gatot Subroto KM. 4 Jalan Kalisabi No. 1 Building 37 Tangerang, Banten 15138 Indonesia Facility: Avient Corporation - Tao Yuan, Taiwan No. 30, Hsing Pang Road Tao Yuan, -- - 330457 Taiwan Facility: Avient Corporation - Toluca, Mexico AV.

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A Few Highlights from 2023: Made strong progress in reducing company’s Scope 1 & 2 GHG emissions, reaching nearly 50% reduction in 2023 vs. 2019

September 5, 2023 CLEVELAND– September 5, 2023 – Avient Corporation, a premier provider of specialized and sustainable material solutions and services, today announced the availability of a robust material solutions platform for electric vehicle supply equipment (EVSE) applications for the North American market.

October 11, 2023 CLEVELAND – October 11, 2023 – Today, Avient Corporation is expanding its Syncure™ XLPE Cross-linkable Polyethylene Formulations portfolio with the launch of new flame-retardant grades made without decabromodiphenyl ethane (DBDPE).

October 2, 2023 CLEVELAND – October 2, 2023 - Avient Corporation, a premier provider of specialized and sustainable material solutions and services, is proud to announce it has achieved a Gold-Level rating from EcoVadis, a globally recognized sustainability ratings platform.