The new formulations are Avient’s first PCR-containing TPE technology developed primarily for overmolding polycarbonate (PC), acrylic butadiene styrene (ABS), and PC/ABS blends in applications from consumer electronics, cosmetics packaging, and personal care items to power tools and toys. Unique technologies that improve the recyclability of products and enable recycled content to be incorporated, thus advancing a more circular economy Trade Media Relations Jennifer Huang  Senior Manager, Marketing Communications Asia  Avient Corporation   +86 21 60284888  jennifer.huang@avient.com 

Avient Corporation (NYSE:AVNT) is an innovator of materials solutions to help our customers succeed, while enabling a sustainable world. We are also a highly specialized developer and manufacturer of performance enhancing additives, liquid colorants and silicone colorants. By intersecting our broad portfolio of technologies with the product roadmaps of our customers, we help create differentiated and high-performance products that make the world better and more sustainable.

New Technology from Avient Helps Trace Origin of Fibers in Polyester and Polyamide Textiles POMMERLOCH, Luxembourg – November 16, 2022 – Avient Corporation today announced the launch of new Cesa™ fiber tracer concentrates specifically d New Details on Specialty, Sustainable Technologies and Services from Avient Featured at K 2022

By also providing our customers with prompt technical service and customized flexible formulation development, we can help them better meet shifting market demands with this new technology.” PolyOne Corporation, with 2013 revenues of $3.8 billion, is a premier provider of specialized polymer materials, services and solutions. Media contact Jennifer Huang Marketing Communications Manager, Asia PolyOne Corporation +86 21 50802923 jennifer.huang@avient.com

AVIENT CORPORATION GOVERNANCE AND CORPORATE RESPONSIBILITY COMMITTEE CHARTER Membership • The Governance and Corporate Responsibility Committee (the “Committee”) of the Board of Directors (the “Board”) of Avient Corporation (the “Company”) will consist entirely of directors who meet the definition of “independent” as set forth in the Corporate Governance Standards of the New York Stock Exchange. • Members of the Committee will be appointed by the Board each year following the annual meeting of shareholders. • Each Committee member will serve at the pleasure of the Board for such term as the Board may decide. General Purposes The general purposes of the Committee are to: • Identify individuals qualified to become Board members, consistent with criteria approved by the Board; • Select, or recommend that the Board select, the director nominees for the next annual meeting of shareholders; • Develop, review and recommend to the Board corporate governance guidelines applicable to the Company; • Oversee the annual evaluation of the Board; and • Assist the Board in fulfilling its oversight responsibilities relating to certain corporate responsibility and environmental, social and governance matters. These factors may include, among others: business or professional experience; knowledge and skill in certain specialty areas such as 2 accounting and finance, international markets, physical sciences and technology, or the specialty materials industry; personal characteristics such as ethical standards, integrity, judgment, leadership, and the ability to devote sufficient time to the affairs of the Company; substantial accomplishment with demonstrated leadership capabilities; freedom from outside interests that conflict with the Company’s best interests; the diversity of backgrounds and experience they will bring to the Board, including diversity with respect to race, gender, national origin, ethnicity, nationality, and sexual orientation, as well as differences in viewpoint, background and skill; and the needs of the Company from time to time. • When identifying nominees for election to the Board, the Committee will include, and will request that any search firm it engages include, qualified female and racially/ethnically diverse persons in the initial pool from which director nominees are chosen.

PolyOne’s Sandrine Reboux, senior marketing manager, and Marc Gauthier, business development manager, will be presenting OnColor Naturals, along with other solutions from the current sustainability portfolio, on January 29th at 11 am CET during the Innovation & Technology Theatre sessions. PolyOne Corporation (NYSE: POL), with 2018 revenues of $2.9 billion, is a premier provider of specialized polymer materials, services and solutions. Michelle Maniscalco Senior Manager, Marketing Communications PolyOne Corporation +1 440-930-1988 michelle.maniscalco@avient.com

ColorMatrix AAzure was developed in response to the need for brand owners and convertors to find solutions that enable increased levels of rPET in their products without reducing performance or quality. PolyOne Corporation (NYSE: POL), with 2019 revenues of $2.9 billion, is a premier provider of specialized polymer materials, services and solutions. Michelle Maniscalco Senior Manager, Marketing Communications PolyOne Corporation +1 440-930-1988 michelle.maniscalco@avient.com

Developed in 45 to 55 Shore A durometers, the new reSound R grades are ideal for general purpose applications in the consumer and automotive industries. Breakthrough technologies that minimize wastewater and improve the recyclability of materials and packaging across a spectrum of end uses Media contact Michelle Maniscalco Senior Manager, Marketing Communications Avient Corporation michelle.maniscalco@avient.com

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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”). All nominees should be individuals of substantial accomplishment with demonstrated leadership capabilities. Succession Planning and Management Development The Board regularly reviews succession planning for the Chief Executive Officer.