Internal 1 Pack MB-3P E3360 GRAY 2822 Gatorade Orange Rev. 1 Shipment Notification - under "Material Header" MSDS - labeled as the "Product Number" (in Section 1)

BLUE # 1 T-225-1-3 Shipment Notification - under "Material Header" MSDS - labeled as the "Product Number" (in Section 1)

X 45147-0002A-01-1 X 45147-0003B-01-1 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)

XGT 44737-0004A-01-1 XGT 44737-0004B-01-1 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)

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

1. This includes standards for flame retardant performance to IEC 60332-1, another key characteristic to consider.