GF 1266 A 33 HS NAT 1 X GT-21973-02-1 Shipment Notification - under "Material Header" MSDS - labeled as the "Product Number" (in Section 1)

February 1, 2023 NEW DELHI, India – February 1, 2023 – For the first time in 5 years, Avient will participate in PlastIndia 2023, where it will be exhibiting its latest innovations and initiatives of sustainable and specialized material solutions for the plastics industry. Avient will exhibit at Hall 5/First Floor/Booth A5 at PlastIndia 2023 in Pragati Maidan, New Delhi, from February 1 to 5.

DeLuca Vice President, Investor Relations PolyOne Corporation +1 440-930-1226 isaac.deluca@avient.com Rose Director, Corporate Communications PolyOne Corporation +1 440-930-3162 kyle.rose@avient.com Trade Media Contact: Michelle Maniscalco Marketing Communications Manager, North America PolyOne Corporation +1 440-930-1988 michelle.maniscalco@avient.com

Telephone: +1 440 930 1000 Fax: +440 930 3064

Equiniti Trust Company 1110 Center Point Curve, Suite 101 Mendota Heights, MN 55120-4100 Phone: 1-800-401-1957 www.shareowneronline.com

X HC-5689-001-1 Natural Shipment Notification - under "Material Header" MSDS - labeled as the "Product Number" (in Section 1)

A43-1 RED 6535N Shipment Notification - under "Material Header" MSDS - labeled as the "Product Number" (in Section 1)

X RS 1884-001-1 Shipment Notification - under "Material Header" MSDS - labeled as the "Product Number" (in Section 1)

HUBMX711 OPAQUE BLUE 1 Shipment Notification - under "Material Header" MSDS - labeled as the "Product Number" (in Section 1)

1% AROSPERSE F-138 POWDER Shipment Notification - under "Material Header" MSDS - labeled as the "Product Number" (in Section 1)