Investor contact: Isaac DeLuca Vice President, Investor Relations PolyOne Corporation +1 440-930-1226 Isaac.deluca@avient.com Media contact: Kyle Rose Director, Corporate Communications PolyOne Corporation +1 440-930-3162 kyle.rose@avient.com

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

DeLuca Vice President, Investor Relations PolyOne Corporation +1 440-930-1226 isaac.deluca@avient.com Media Contact: Kyle Rose Director, Corporate Communications PolyOne Corporation +1 440-930-3162 kyle.rose@avient.com

Addressing Circular Economy Challenges with Innovative Color and Additive Solutions: presented by Derek Lua from Color & Additives Asia, April 23 at 1:10 pm How Avient Can Help with Metal Replacement for Applications in the Healthcare Industry: presented by Catherine Hu, Senior Marketing Specialist from Specialty Engineered Materials Asia, April 24 at 1:50 pm  

1) Global Reporting Initiative (GRI): includes three categories of standards that provide transparency of ESG metrics to all individuals involved in an organization: Here are some ESG factors to consider when deciding on collaborations within your industry’s value chain:  1) Environmental factors

1. This is 50 to 100 times greater than standard thermoplastics and 1/5 that of cast aluminum.

STAN-TONE HCC-108787 DARK BROWN H #1 Shipment Notification - under "Material Header" MSDS - labeled as the "Product Number" (in Section 1)

Attachment 1 Special items (1) Tax specials - expense (Attachment 1)

Avient Q2 2025 Earnings - August 1, 2025 Morgan Conference - 3/1/2022 PolyOne IR Presentation - Longbow Basic Materials Conference - 3/1/2016

Avient Q2 2025 Earnings - August 1, 2025 Morgan Conference - 3/1/2022 PolyOne IR Presentation - Longbow Basic Materials Conference - 3/1/2016