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)

BLUE Q-310-1-1 (PC) 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

MC-14204PE CL2.BLU.1 MC-14365PE CL2.NVY.1 Shipment Notification - under "Material Header" MSDS - labeled as the "Product Number" (in Section 1)

DOWNY BLUE 1 DOWNY BLUE 1.B Shipment Notification - under "Material Header" MSDS - labeled as the "Product Number" (in Section 1)

Trilliant 118095#SR-08557-7C-1 Gray X TR-6709-001-1 Natural Shipment Notification - under "Material Header" MSDS - labeled as the "Product Number" (in Section 1)

X ET-31431-002-1 (PPA-GF) X TT-29221-001-1 Shipment Notification - under "Material Header" MSDS - labeled as the "Product Number" (in Section 1)

TR DK BLUE2 T225-3-1 PC RED 483-31423-1 Shipment Notification - under "Material Header" MSDS - labeled as the "Product Number" (in Section 1)

X HC 127692#SR-33389-1 Natural 0.5% X ET #SR-33853-1 TiO2 Conc Shipment Notification - under "Material Header" MSDS - labeled as the "Product Number" (in Section 1)