Samples will be on display next week at NPE 2015 in PolyOne’s Customer Innovation Center, Room S230BC.  PolyOne Corporation, with 2014 revenues of $3.8 billion, is a premier provider of specialized polymer materials, services and solutions.

AVNT-2023.09.30-News Release 1 NEWS RELEASE FOR IMMEDIATE RELEASE Avient Announces Third Quarter 2023 Results • GAAP EPS of $0.06 includes special items primarily related to environmental costs and amortization expense. • Adjusted EPS of $0.57 exceeds guidance of $0.56 as a result of favorable margins and reduced interest expense offsetting lower than projected sales. • Fourth quarter and full year adjusted EPS guidance updated to $0.47 and $2.30, respectively; full year free cash flow expectation maintained at $180 million. • Destocking appears to be nearing an end in many end markets; fourth quarter adjusted EPS projected to be 12% higher than prior year. See Attachment 3 for a definition and summary of special items. See Attachment 3 for a definition and summary of special items.

Level of Assurance and Qualifications:  Limited  This verification used a materiality threshold of ±5% for aggregate errors in sampled data for each of the above indicators GHG Verification Methodology: Evidence-gathering procedures included, but were not limited to:  Interviews with relevant personnel of Avient and their consultant;  Review of documentary evidence produced by Avient;  Review of Avient data and information systems and methodology for collection, aggregation, analysis and review of information used to determine GHG emissions; and  Audit of sample of data used by Avient to determine GHG emissions. Page 3 WATER RESOURCES • ENVIRONMENTAL SERVICES • INDUSTRIAL HYGIENE • SAFETY • SUSTAINABILITY Apex Companies, LLC • (800) 733‐2739 • www.apexcos.com Statement of independence, impartiality and competence Apex is an independent professional services company that specializes in Health, Safety, Social and Environmental management services including assurance with over 30 years history in providing these services. We consent to the release of this declaration by you to the public or other organizations but without accepting or assuming any responsibility or liability on our part to any other party who may have access to this declaration.

CLEVELAND – PolyOne Corporation (NYSE: POL), a premier provider of specialized polymer materials, services and solutions, intends to release its fou SHANGHAI – PolyOne Corporation (NYSE: POL), a premier provider of specialized polymer materials, services and solutions, was recently recognize CLEVELAND – PolyOne Corporation (NYSE: POL), a premier global provider of specialized polymer materials, services and solutions, has announced

RED TRITAN-SAMPLE #1 RED TRITAN-SAMPLE #2 Sales Order Confirmation - under "Material Header"

ECO6 PE SAMPLE 1 ECO6 PP SAMPLE 1 Sales Order Confirmation - under "Material Header"

FN007 BLACK AO SAMPLE B FN007 AO SAMPLE A Sales Order Confirmation - under "Material Header"

X040-033-29-02-1 (LAVANTURE SAMPLE) X0400-034-021 (KROY SAMPLE) Sales Order Confirmation - under "Material Header"

I look forward to sharing more details in our third quarter earnings call and at our upcoming investor day in New York City on December 4th." 3 Sustainability Report Release The company also announced the release of its latest Sustainability Report, now available at www.avient.com/sustainability. See Attachment 3 for a definition and summary of special items. See Attachment 3 for a definition and summary of special items.

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