ET6000-0006 HI UV Desert Sand 1 ET6000-0006 HI UV Desert Sand 1 CONC 5% Shipment Notification - under "Material Header" MSDS - labeled as the "Product Number" (in Section 1)

WHITE ABS #1 2 X TT-571-001-1 Shipment Notification - under "Material Header" MSDS - labeled as the "Product Number" (in Section 1)

TRSP T315-1-1 Shipment Notification - under "Material Header" MSDS - labeled as the "Product Number" (in Section 1)

UV WHITE WALL M6306-1 ONFLEX-V EXP # 800-404-1 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)

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)

BLUE 1 PURPLE Q250-2-1 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

15:1 L48-1206 TRANS BLUE IN TPU PCR ICY BLUE Q330-5-1 Shipment Notification - under "Material Header" MSDS - labeled as the "Product Number" (in Section 1)

GREY 1749 PMS-1 V4 ZHEA EBONY(SM)FT1002 10:1 VII Shipment Notification - under "Material Header" MSDS - labeled as the "Product Number" (in Section 1)