Avon Lake, OH 44012 P: +1 (440) 930-3000 I: +1 (866) 737-2066 F: +1 (440) 930-3064 Dear Valued Customer: Thank you for your inquiry regarding the quality system at PolyOne. Actual data from a production run is recorded as the "run history" and fed back to the functions such as planning and scheduling to make necessary adjustments to things like run rates. 5.5 Responsiveness 1. Active/Back-up C10 Is the processing capacity of your back-up facility equal to that of your primary facility?

Use Case #1: Aftermarket Sidestep

Echevarria earned a bachelor’s of science in managerial economics and marketing from Bentley University in Waltham, Massachusetts and a master’s of business administration from the University of Chicago, Booth School of Business in Chicago, Illinois. 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

Leffler earned a bachelor's degree in economics and history from Yale University and an MBA in finance from Emory University. Swanson Director, Investor Relations PolyOne Corporation +1 440-930-1018 eric.swanson@avient.com Rose Vice President, Corporate Communications PolyOne Corporation +1 440-930-3162 kyle.rose@avient.com

Kutno, Poland 1. So we took action, and haven’t looked back. Forward-looking statements will give current expectations or forecasts of future events and are not guarantees of future performance.

UNIVERSAL WHITE UNIVERSAL JET BLACK Together we can unlock the powerful potential of a future envisioned by you... and shared by us all.

UV UNIVERSAL BLUE PQ-3015C UV UNIVERSAL GREY Together we can unlock the powerful potential of a future envisioned by you... and shared by us all.

Forward-looking statements give current expectations or forecasts of future events and are not guarantees of future performance. In particular, these include statements relating to future actions; prospective changes in raw material costs, product pricing or product demand; future performance; estimated capital expenditures; results of current and anticipated market conditions and market strategies; sales efforts; expenses; the outcome of contingencies such as legal proceedings and environmental liabilities; and financial results. Pro Forma Financial Information The Company acquired Avient Protective Materials (“Dyneema”) on September 1, 2022 (the “Acquisition Date”) and sold the Distribution segment on November 1, 2022.

Avient and Coloro are currently offering 226 Coloro colors as standard colorants for dope-dyeing, with plans to expand in the future. Coloro is the future of color. A unique and material-independent system of 1.6 million color codes, including beautifully designed color tools for creatives, backed with technical solutions, services and data for the supply chain, providing the product design sector the freedom to create and execute color with total confidence.

White is the New White: PolyOne Launches Wilflex™ Universal White Ink for Textile Screen Printing KENNESAW, Ga. – PolyOne today unveiled Wilflex™ EPIC™ Single LC White, a new, white ink that is universally compatible with both polyester