X ET-66928-414-1-1 Black Shipment Notification - under "Material Header" MSDS - labeled as the "Product Number" (in Section 1)

X HC-16160-01-1 GREY 1749 PMS-1 V3 Shipment Notification - under "Material Header" MSDS - labeled as the "Product Number" (in Section 1)

RTMB (1% LUMOGEN FK4281) PBlue 15:3 20% (45-008-1) (M) GS Shipment Notification - under "Material Header" MSDS - labeled as the "Product Number" (in Section 1)

X 45147-0002A-01-1 X 45147-0003C-01-1 Shipment Notification - under "Material Header" MSDS - labeled as the "Product Number" (in Section 1)

MC-73295PP WHITE W/ 1 YR UV MC-81124PE CL.GRY.1 Shipment Notification - under "Material Header" MSDS - labeled as the "Product Number" (in Section 1)

X GT-33227-04A-01-1 C32441 BLUE #1 C3 Shipment Notification - under "Material Header" MSDS - labeled as the "Product Number" (in Section 1)

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

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

TRANSL WHITE PEARL T915-1-1 Shipment Notification - under "Material Header" MSDS - labeled as the "Product Number" (in Section 1)

X-AR-444872A-1 XGT 45433-0002A-01-1 Shipment Notification - under "Material Header" MSDS - labeled as the "Product Number" (in Section 1)