WHITE 275N CONC (25-1) BLACK 145N CONC (25-1) V Shipment Notification - under "Material Header" MSDS - labeled as the "Product Number" (in Section 1)

34015-1A-1 PEEK70/PTFE30 34015-1A-1 PEEK70/GRAPHITE30 Shipment Notification - under "Material Header" MSDS - labeled as the "Product Number" (in Section 1)

XHC-37463-0002B-01-1 XHC-37178-0002A-01-1 Shipment Notification - under "Material Header" MSDS - labeled as the "Product Number" (in Section 1)

X GRV-15364-02-1 X150-213-102-1 WHITE 1024 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)

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)