Investor Relations - Joe Di Salvo, Vice President, Investor Relations, PolyOne Corporation, +1 440-930-1921, giuseppe.disalvo@avient.com; Media Contact - Kyle G. Rose, Vice President, Corporate Communications, PolyOne Corporation, +1 440-930-3162, kyle.rose@avient.com

Avient’s chief operating decision maker uses these financial measures to monitor and evaluate the ongoing performance of Avient and each business segment and to allocate resources. For the same reasons, Avient is unable to address the probable significance of the unavailable information. Pro Forma Financial Information Avient acquired the Clariant Color business on July 1, 2020 (the “Acquisition Date”).

To learn more, contact Avient at +1.844.4AVIENT (844.428.4368). When coupled with customized metering equipment from Avient, processors were able to achieve uniform distribution of active CFA content. Powder CFA Pellet CFA ColorMatrix Excelite Typical CFA Density 0.52 g/cc Excelite CFA Density 0.50 g/cc PF-1 Density 0.43 g/cc PF-1 Density 0.339 g/cc PF-1 Density 0.351 g/cc

Attachment 1 Special items (1) Avient Hires David N.

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1. Learn more about UV barrier additive options by contacting an expert at Avient today!

Avient’s chief operating decision maker uses these financial measures to monitor and evaluate the ongoing performance of Avient and each business segment and to allocate resources. Pro Forma Financial Information The Company acquired Avient Protective Materials (“Dyneema”) on September 1, 2022 (the “Acquisition Date”) and sold the Distribution segment on November 1, 2022. To provide comparable results, the company references “pro forma” financial metrics, which include the business results of Avient Protective Materials for periods prior to the Acquisition Date, as if the transaction occurred on January 1, 2021 and reflect Distribution as a discontinued operation.

Avient Announces Fifteenth Consecutive Annual Dividend Increase... Avient To Hold Third Quarter 2025 Conference Call... Avient Hires David N.