Rating range 1-8 (low to high)

Webcast Details Avient will provide additional details on its 2025 first quarter and its 2025 full year outlook during its webcast scheduled for 8:00 a.m. Factors that could cause actual results to differ materially from those implied by these forward- looking statements include, but are not limited to: disruptions, uncertainty or volatility in the credit markets that could adversely impact the availability of credit already arranged and the availability and cost of credit in the future; the effect on foreign operations of currency fluctuations, tariffs and other political, economic and regulatory risks; disruptions or inefficiencies in our supply chain, logistics, or operations; changes in laws and regulations in jurisdictions where we conduct business, including with respect to plastics and climate change; fluctuations in raw material prices, quality and supply, and in energy prices and supply; demand for our products and services; production outages or material costs associated with scheduled or unscheduled maintenance programs; unanticipated developments that could occur with respect to contingencies such as litigation and environmental matters; our ability to pay regular quarterly cash dividends and the amounts and timing of any future dividends; information systems failures and cyberattacks; our ability to service our indebtedness and restrictions on our current and future operations due to our indebtedness; amounts for cash and non-cash charges related to restructuring plans that may differ from original estimates, including because of timing changes associated with the underlying actions; and other factors affecting our business beyond our control, including without limitation, changes in the general economy, changes in interest rates, changes in the rate of inflation, geopolitical conflicts, tariffs and any recessionary conditions. You are advised to consult any further disclosures we make on related subjects in our reports on Form 10-Q, 8-K and 10-K that we provide to the Securities and Exchange Commission. 5 Investor Relations Contact: Giuseppe (Joe) Di Salvo Vice President, Treasurer and Investor Relations Avient Corporation +1 440-930-1921 giuseppe.disalvo@avient.com Media Contact: Kyle G.

ELECTION OF BOARD OF DIRECTORS 8 William R. Since our transformation began in 2006, our earnings per share has grown at a compounded annual growth rate of 36%. To obtain comparability based on company size, the Consultant’s analysis either referenced a specific sample of comparably-sized companies or calibrated the pay of a broad sample of companies against company size.

Properties shown are based on a representative sample and may vary based on actual material selection.

Samples are recommended.

We provide samples to so you’ll be sure you’ve selected the best solution for your design and brand.

Winona, Minnesota 8. Barcelona, Spain 8. Brampton, Ontario, Canada 8.

PCR Color Prediction Service: a digital tool developed to illustrate the color possibilities or limitations of certain post-consumer recycled material (PCR) before sample development to help simplify the overall decision-making process for brand owners and technical colorists.

These calculations showed that the new TPE would deliver significant cycle time efficiencies and reduced scrap rates, more than offsetting its slightly higher material cost and higher specific gravity.

These calculations showed that the new TPE would deliver significant cycle time efficiencies and reduced scrap rates, more than offsetting its slightly higher material cost and higher specific gravity.