GF 600 A 14 HS NATURAL GF 600 A 14 NATURAL Shipment Notification - under "Material Header" MSDS - labeled as the "Product Number" (in Section 1)

Wednesday, September 14, 2016 Swanson, Director, Investor Relations, PolyOne Corporation, +1 440-930-1018, eric.swanson@avient.com, Media Contact: Kyle G. Rose,Vice President, Corporate Communications, PolyOne Corporation, +1 440-930-3162, kyle.rose@avient.com

March 14, 2023 Investor Relations Contact: Giuseppe (Joe) Di Salvo, Vice President, Treasurer and Investor Relations, Avient Corporation, +1 440-930-1921, giuseppe.disalvo@avient.com or Media Contact: Kyle G. Rose, Vice President, Corporate Communications, Avient Corporation, +1 440-930-3162, kyle.rose@avient.com

ROJO Q150-1-1 PC NOSEGAY 14-2806 2 Material or Material Number) has either 12 or 14 characters.

X 15095-02-1 X ST-1053-001-1 D3208-14 BROWN

NM6600-0018 HI HS 14 NAT X GT 41453-0002A-01-1 X 41839-01A-01-1

STAN-TONE MB-35692 PINK 14-1911 STAN-TONE MB-35695 TAN 14-1307 Shipment Notification - under "Material Header" MSDS - labeled as the "Product Number" (in Section 1)

HMF RED UV PE 14 HMF RED HOT UV PE 14 Shipment Notification - under "Material Header" MSDS - labeled as the "Product Number" (in Section 1)

BB TEAL 14-4522 NYL ORCHID PURPLE 14-3612 NYL Shipment Notification - under "Material Header" MSDS - labeled as the "Product Number" (in Section 1)

March 14, 2017 Swanson, Director, Investor Relations, PolyOne Corporation, +1 440-930-1018, eric.swanson@avient.com; Media Contact: Kyle G. Rose, Vice President, Corporate Communications, PolyOne Corporation, +1 440-930-3162, kyle.rose@avient.com