Unified social credit code: 91320412MA1NMF5W4P is in conformity with Environmental Management System Standard: GB/T 24001-2016 / ISO 14001:2015 The certificate is valid to the following product(s)/service: Coating Processing of Textile (Yarn) and Glass Products (Yarn) and Related Management Activities Registration Address/ Physical Address: R&D Workshop 5, No. 8, Lanxiang Road, West Taihu Science and Technology Industrial Park, Changzhou City, Jiangsu Province, P.

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Swanson Director, Investor Relations PolyOne Corporation +1 440-930-1018 eric.swanson@avient.com Rose Vice President, Corporate Communications PolyOne Corporation +1 440-930-3162 kyle.rose@avient.com Company Officers

Corporate Media Contact: Kyle G. Rose Director, Corporate Communications PolyOne Corporation +1 440-930-3162 kyle.rose@avient.com Company Officers

Sanders is Senior Vice President, General Counsel and Secretary at Avient Corporation, an innovator of materials solutions that help customers succeed while enabling a sustainable world. She previously served as Senior Vice President and Deputy Chief Legal Officer, Global Operations at Eaton Corporation, a power management company. Avient Corporation • 33587 Walker Road • Avon Lake, Ohio 44012 • 440.930.1000 • www.avient.com

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Patterson, president and chief executive officer, PolyOne Corporation. PolyOne Corporation, with 2013 revenues of $3.8 billion, is a premier provider of specialized polymer materials, services and solutions. Company Officers

About Toyobo MC Corporation TOYOBO MC Corporation began operations in April 2023 as a joint venture between Toyobo Co., Ltd. and Mitsubishi Corporation. Media Contact Crandall Turner Avient Corporation crandall.turner@avient.com  Company Officers

CLEVELAND, Jan. 8, 2024 /PRNewswire/ -- Avient Corporation (NYSE: AVNT), a leading provider of specialized and sustainable material solutions, inten Khandpur as Chief Executive Officer Effective December 1, 2023 CLEVELAND, Oct. 12, 2023 /PRNewswire/ -- The Board of Directors of Avient Corporation (NYSE: AVNT), a leading provider of specialized and sustainabl

CLEVELAND, June 14, 2021 /PRNewswire/ -- Avient Corporation (NYSE: AVNT), a premier provider of specialized and sustainable material solutions and s Vinod Purayath as Chief Technology Officer CLEVELAND, June 1, 2021 /PRNewswire/ -- Avient Corporation (NYSE: AVNT), a leading provider of specialized and sustainable material solutions, has