X S100A Flex 2-1 X ST-22679-001-1 Shipment Notification - under "Material Header" MSDS - labeled as the "Product Number" (in Section 1)

X ET2010-0013 Purple Trans PntneT145-1-1 Shipment Notification - under "Material Header" MSDS - labeled as the "Product Number" (in Section 1)

CHUTE CAP Q728-1-2 GREY PP TETHER Q728-1-2 GREY PE Shipment Notification - under "Material Header" MSDS - labeled as the "Product Number" (in Section 1)

VIOLET CRÈME SAD-1267-1 GREY Q758-1-3 Shipment Notification - under "Material Header" MSDS - labeled as the "Product Number" (in Section 1)

T255-1-2 BLUE PET T245-1-2 BLUE PET Shipment Notification - under "Material Header" MSDS - labeled as the "Product Number" (in Section 1)

X MF-11038-001-1 Natural X MF-11038-002-1 Natural Shipment Notification - under "Material Header" MSDS - labeled as the "Product Number" (in Section 1)

1% UV GREY PE/PP 1% UV GREEN PE 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)