Swanson Director, Investor Relations PolyOne Corporation +1 440-930-1018 eric.swanson@avient.com Rose Vice President, Corporate Communications PolyOne Corporation +1 440-930-3162 kyle.rose@avient.com

EPS(1) 1) 1)

per share (see Attachment 1). Attachment 1 Special items (1)

TRSP PURPLE T-505-1-3 TRSP ORANGE T-505-7-1 Shipment Notification - under "Material Header" MSDS - labeled as the "Product Number" (in Section 1)

PPR-40G F-1 BLACK WHITE 131N CONC (25-1) 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 1 PURPLE Q250-2-1 Shipment Notification - under "Material Header" MSDS - labeled as the "Product Number" (in Section 1)

GREY-1/ PPRO-1 Shipment Notification - under "Material Header" MSDS - labeled as the "Product Number" (in Section 1)

HC DK TR PURPLE OVERCAP #1 HC DK TR PURPLE OVERCAP #1 Shipment Notification - under "Material Header" MSDS - labeled as the "Product Number" (in Section 1)

PEARL SILVER 1 BLUE S-218-1 Shipment Notification - under "Material Header" MSDS - labeled as the "Product Number" (in Section 1)