September 10, 2024 MEXICO CITY – September 10, 2024 – Avient Corporation, a premier provider of specialized and sustainable materials solutions and services, announces its participation in the Plastics Recycling LATAM Conference beginning today, emphasizing its commitment to sustainability and dedication to enabling recyclability for its customers. Jul 10, 2025

July 10, 2025 CLEVELAND – July 10, 2025 – Avient Corporation, an innovator of materials solutions, is pleased to announce the launch of the first grade in its new ColorMatrix™ Amosorb™ Oxyloop™ portfolio of oxygen scavengers: ColorMatrix™ Amosorb™ Oxyloop-1. Jul 10, 2025

October 10, 2018 DALLAS, Texas – October 10, 2018 – At the Composites and Advanced Materials Expo (CAMX) next week, PolyOne will be highlighting its extensive portfolio of continuous fiber composites along with its processing and design expertise, which enables customers to benefit the most from these materials. Jul 10, 2025

May 10, 2021 CLEVELAND – May 10, 2021 – Avient today announced the addition of three proprietary, thermoplastic elastomer (TPE) formulations that contain antimicrobial additives to its GLS™ TPE portfolio. Jul 10, 2025

October 10, 2022 CLEVELAND – October 10, 2022 – Avient Corporation today announced it will highlight its breadth of composite solutions, including new materials formulated with recycled content, at the upcoming Composites and Advanced Materials Expo (CAMX). Jul 10, 2025

September 10, 2020 CLEVELAND– September 10, 2020 – At the virtual Composites and Advanced Materials Expo (CAMX), Avient Corporation will introduce new enhanced adhesion formulations for its Glasforms™ thermoset pultruded composites. Jul 10, 2025

November 10, 2020 CLEVELAND – November 10, 2020 – Avient Corporation, a premier provider of specialized and sustainable material solutions and services, today introduced its newest sustainable material family: Artisan™ thermoplastics. Jul 10, 2025

Compared to other natural fiber reinforced solutions, reSound NF materials will offer mechanical property improvements of more than 20% for tensile and flexural properties, 10°C to 20°C higher heat deflection temperature, and an increase of more than 50% in impact strength. They feature densities 5-10% lower than comparable glass fiber formulations to reduce weight. Jul 10, 2025

S ee S p ec ifi c In st ru ct io ns o n p ag e 3. 1 Name (as shown on your income tax return). Form W-9 (Rev. 10-2018) Page 5 1. A valid trust, estate, or pension trust Legal entity4 10.

Avient IR Presentation - Goldman Sachs and Morgan Stanley Conferences - 10/5/2020 to 10/7/2020 PolyOne Investor Day Presentation - 5/10/2018 Mar 10, 2011