September 1, 2022 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. Rose, Vice President, Corporate Communications, Avient Corporation, +1 440-930-3162, kyle.rose@avient.com

BLACK Q716-1-1 THREADS PP Shipment Notification - under "Material Header" MSDS - labeled as the "Product Number" (in Section 1)

X GT 32926-0006B-01-1 BLUE 787 AD-1 Shipment Notification - under "Material Header" MSDS - labeled as the "Product Number" (in Section 1)

Amosorb SolO2-1 880-4030-1 Shipment Notification - under "Material Header" MSDS - labeled as the "Product Number" (in Section 1)

G-T325-1-2 (CLR ABS) YELLOW 1 Shipment Notification - under "Material Header" MSDS - labeled as the "Product Number" (in Section 1)

INFALLIBLE RED #1 - DARK INFALLIBLE RED #1 - LIGHT Shipment Notification - under "Material Header" MSDS - labeled as the "Product Number" (in Section 1)

GRAY Q716-3-1 GRAY Q716-3-1 Shipment Notification - under "Material Header" MSDS - labeled as the "Product Number" (in Section 1)

ET6000-0006 HI UV Sand Dune 1 X 43400-0002A-01-1 Shipment Notification - under "Material Header" MSDS - labeled as the "Product Number" (in Section 1)

BLUE Q-310-1-1 (PC) Shipment Notification - under "Material Header" MSDS - labeled as the "Product Number" (in Section 1)

GENEVA BLUE-1 PC ORANGE Q100-1-3 Shipment Notification - under "Material Header" MSDS - labeled as the "Product Number" (in Section 1)