SHANGHAI – August 27, 2024 – Avient Corporation, a premier provider of specialized and sustainable materials solutions and services, will showcase its extensive portfolio of synthetic fiber colorants and functional additives for the textile industry at Yarn Expo Autumn, one of Asia’s leading yarn and fiber trade fairs in Shanghai, August 27th through 29th.  The textile industry is currently one of many major industries under pressure to reduce its environmental impact rapidly,” said Bob Lee, General Manager, Color and Additives Greater China at Avient. Avient Corporation provides specialized and sustainable materials solutions that transform customer challenges into opportunities, bringing new products to life for a better world.

CC_Score_Report_2020 ACTIVITY GROUP PERFORMANCE Trading, wholesale, distribution, rental & leasing Your company is amongst 35% of companies that reached Management level in your Activity Group A sample of A-list companies from your Activity Group: Grupo Logista PolyOne received a B which is in the Management band. Leadership (A/A-): Implementing current best practices Management (B/B-): Taking coordinated action on climate issues Awareness (C/C-): Knowledge of impacts on, and of, climate issues Disclosure (D/D-): Transparent about climate issues UNDERSTANDING YOUR SCORE REPORT PolyOne Region North America Country United States of America Questionnaire General Activity Group Trading, wholesale, distribution, rental & leasing The CDP Score Report allows companies to understand their score and indicate which categories require attention to reach higher scoring levels.

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Check only one of the following seven boxes. Individual/sole proprietor or single-member LLC C Corporation S Corporation Partnership Trust/estate Limited liability company. Note: If the account is in more than one name, see the instructions for line 1.

Avient Corporation Avient Corporation In addition, a recording of the audio will be available for one week, beginning at

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Number: BC1228188 CERTIFICATE OF CHANGE OF NAME BUSINESS CORPORATIONS ACT I Hereby Certify that POLYONE CANADA ULC changed its name to AVIENT CANADA ULC on January 15, 2021 at 12:13 PM Pacific Time.

CERTIFICATE OF INCORPORATION ON CHANGE OF NAME Company Number 3141094 The Registrar of Companies for England and Wales hereby certifies that under the Companies Act 2006: POLYONE CORPORATION UK LIMITED a company incorporated as private limited by shares, havingits registered office situated in England and Wales, has changed its name to: AVIENT MATERIAL SOLUTIONS UK LIMITED Given at Companies House on9th November 2021.

Corporate Governance Guidelines. March 2025 - Final and Approved version.pdf Avient Corporation Corporate Governance Guidelines The Board of Directors (the “Board”) of Avient Corporation (the “Company”) has adopted the following Corporate Governance Guidelines (the “Guidelines”). If the positions of Chairman of the Board and Chief Executive Officer are held by the same person or if the Chairman of the Board is otherwise not an independent director, the Board, upon recommendation from the Governance and Corporate Responsibility Committee, will select one of the independent directors who has served for at least one year on the Board to serve as the Lead Director.

We enhance our strong strategic foundation with sustainability cornerstones, which provide guideposts for our corporate responsibility and customer-centered innovation. Climate change continues to be one of the defining issues of our time, and at Avient, we are dedicated to do our part.