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. Management believes this provides comparability of the performance of the combined businesses. Management believes this provides comparability of the performance of the combined businesses.

Cesa™ Additives for Polyolefin Flms provide film and sheet extruders the ability to tailor their processing and finished goods performance, assisting in achieving cost savings and product line management. Product/Service Overview Provide the ultimate protection for non-carbonated products and carbonated beverages

is a premier provider of specialized polymer materials, services and solutions. Adjustments to reconcile net income to net cash provided by operating activities: Net cash provided by operating activities

_______________________ Vice President, Accreditation Services For the Accreditation Council Certificate Number 0562.01 Valid to October 31, 2023 0562-01 0562-01c

Trace McInturff, Vice President, Accreditation Services For the Accreditation Council Certificate Number 0962.01 Valid to September 30, 2025

SHENZHEN, China – April 15, 2025 – Avient Corporation, an innovator of materials solutions, will showcase its portfolio of advanced and sustainable products and services and host three technical seminars at Chinaplas 2025. Additional highlights at the show include various high-temperature colorants and color services, such as: In doing so, we innovate solutions that help our customers overcome their challenges or capitalize on opportunities provided by the fast-changing world and secular trends.

Registration information to access the Sustainability Day event will be provided in a news release in advance of the event. The Company does not provide reconciliations of forward-looking non-GAAP financial measures, such as adjusted EPS and adjusted EBITDA, to the most comparable GAAP financial measures on a forward-looking basis because the Company is unable to provide a meaningful or accurate calculation or estimation of reconciling items and the information is not available without unreasonable effort. 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. 6 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.

CLEVELAND – November 2, 2023 – Avient Corporation (NYSE: AVNT), a leading provider of specialized and sustainable material solutions, today announced its third quarter 2023 results. The Company does not provide reconciliations of forward-looking non-GAAP financial measures, such as adjusted EPS and adjusted EBITDA, to the most comparable GAAP financial measures on a forward-looking basis because the Company is unable to provide a meaningful or accurate calculation or estimation of reconciling items and the information is not available without unreasonable effort. 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. 6 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.

Avient does not provide reconciliations of forward-looking non-GAAP financial measures, such as outlook for Adjusted EBITDA, Adjusted Earnings Per Share, Net Debt/Adjusted EBITDA and Free Cash Flow to the most comparable GAAP financial measures on a forward-looking basis because Avient is unable to provide a meaningful or accurate calculation or estimation of reconciling items and the information is not available without unreasonable effort. Management believes this provides comparability of the performance of the combined businesses. A reconciliation of these measures to their most directly comparable GAAP measures is provided in the tables below.

Further fueling growth are the unique service offerings we provide, such as IQ Design, LSS Customer First, and web-based customer interfacing," added Mr. is a premier provider of specialized polymer materials, services and solutions. 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