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)

GRAY Q716-3-1 GRAY Q716-3-1 Shipment Notification - under "Material Header" MSDS - labeled as the "Product Number" (in Section 1)

X-AR-444872A-1 XGT 45433-0002A-01-1 Shipment Notification - under "Material Header" MSDS - labeled as the "Product Number" (in Section 1)

XGT 44737-0004A-01-1 XGT 44737-0004B-01-1 Shipment Notification - under "Material Header" MSDS - labeled as the "Product Number" (in Section 1)

TRANSL WHITE PEARL T915-1-1 Shipment Notification - under "Material Header" MSDS - labeled as the "Product Number" (in Section 1)

Southern States saw an opportunity to provide a unique solution to its utility customers, who were under pressure to comply with new physical security mandates from the Federal Energy Regulatory Commission (FERC)1. 1 http://www.ferc.gov/media/news-releases/2014/2014-4/11-20-14-E-4.asp#.Vuwyv3bmqUk EDITORS: For a high-resolution image, please click here: Southern States To access PolyOne’s news library online, please go to www.polyone.com/news.  Media contact Michelle Maniscalco Marketing Communications Manager, North America PolyOne Corporation +1 440-930-1988 michelle.maniscalco@avient.com