Avient Announces New Eco-Conscious, Flexible Option for Liquid Metering  ColorMatrix™ FlexOne™: A single equipment unit that will be on display at Avient’s booth featuring new technology for liquid metering, developed with sustainability in mind to optimize the benefits of liquid colorant and additive technologies for a range of applications. 

Accelerates Specialty platform growth with expanded portfolio of liquid polymer solutions CLEVELAND – PolyOne Corporation (NYSE: POL), a premier global provider of specialized polymer materials, services and solutions, today announced the acquisition of specialty assets from Accella Performance Materials, a leading North American manufacturer of liquid polymer formulations. Factors that could cause actual results to differ materially from those implied by these forward-looking statements include, but are not limited to: unexpected costs that may arise from the announced acquisition of the Accella business; any material adverse changes in the acquired Accella business; our ability to achieve the strategic and other objectives relating to the acquired Accella business, including any expected synergies; our ability to successfully integrate the acquired Accella business and achieve the expected results of the acquisition, including, without limitation, the acquisition being accretive; the final amount of charges resulting from the planned North American asset realignment and the Company’s ability to realize anticipated savings and operational benefits from the asset realignment; our ability to achieve the strategic and other objectives relating to the acquisition of Spartech Corporation, including any expected synergies; our ability to successfully integrate Spartech and achieve the expected results of the acquisition, including, without limitation, the acquisition being accretive; disruptions, uncertainty or volatility in the credit markets that could adversely impact the availability of credit already arranged and the availability and cost of credit in the future; the financial condition of our customers, including the ability of customers (especially those that may be highly leveraged and those with inadequate liquidity) to maintain their credit availability; the speed and extent of an economic recovery, including the recovery of the housing market; our ability to achieve new business gains; the effect on foreign operations of currency fluctuations, tariffs and other political, economic and regulatory risks; changes in polymer consumption growth rates where we conduct business; changes in global industry capacity or in the rate at which anticipated changes in industry capacity come online; fluctuations in raw material prices, quality and supply and in energy prices and supply; production outages or material costs associated with scheduled or unscheduled maintenance programs; unanticipated developments that could occur with respect to contingencies such as litigation and environmental matters; an inability to achieve or delays in achieving or achievement of less than the anticipated financial benefit from initiatives related to working capital reductions, cost reductions and employee productivity goals; an inability to raise or sustain prices for products or services; an inability to maintain appropriate relations with unions and employees; the inability to achieve expected results from our acquisition activities; our ability to continue to pay cash dividends; the amount and timing of repurchases of our common shares, if any; and other factors affecting our business beyond our control, including, without limitation, changes in the general economy, changes in interest rates and changes in the rate of inflation.

U-PVC WALL CEILING PRODUCER C O R R U G A T E D S H E E T • Achieved the beige color target with a uniform coloring process, ensuring a high- quality sheet appearance • Adjusted color strength in sheet production using online controls at the pump controller • Maintained a clean operation by eliminating powdery pigments in the workplace ColorMatrix Liquid Color Concentrates WHY AVIENT AVIENT SOLUTION PRODUCTIVITY + SAFETY LIQUID COLOR CONCENTRATES AND DOSING | AVIENTLEARN MORE • Reduces particulates from TiO2 bulk pigment use in the workplace • Color consistency and good surface finish • Maintain good mechanical properties and shore hardness of the extruded sheet • Compliance with heavy metal-free and RoHS regulations KEY REQUIREMENTS Copyright © 2025, Avient Corporation. https://www.avient.com/products/polymer-colorants/liquid-color-concentrates-and-dosing https://www.avient.com/products/polymer-colorants/liquid-color-concentrates-and-dosing https://www.avient.com/products/polymer-colorants/liquid-color-concentrates-and-dosing Slide 1: U-Pvc wall ceiling Producer

U-PVC PIPE & FITTING PRODUCER P I P E & F I T T I N G • Meet the diverse coefficient of friction (CoF) requirements across various film structures and compositions for a wide range of applications • Improve the speed of slip blooming and ensure consistent slip performance post-film production • Preserve excellent optical and mechanical properties • Compliance with food regulations for end packaging in food sealant applications • Improved the customer’s workplace environment by installing a new tote liquid supply system • Enhanced color consistency and reduced production wastage from pigment speck and streak issues • Complied with strict regulatory controls for potable pipe requirements ColorMatrix Liquid Color Concentrates KEY REQUIREMENT WHY AVIENT AVIENT SOLUTION PRODUCTIVITY + COMPLIANCE Avient Corporation 1 • Meet the diverse coefficient of friction (CoF) requirements across various film structures and compositions for a wide range of applications • Improve the speed of slip blooming and ensure consistent slip performance post-film production • Preserve excellent optical and mechanical properties • Compliance with food regulations for end packaging in food sealant applications KEY REQUIREMENT • Standard colorant to apply for internal color matching in PVC sheet applications • Phthalate free plasticizer class as hazardous healthy control requirement • Good thermal stability and compatibility in PVC resin of color index choices • Compliance with Heavy metal free and RoHS regulation KEY REQUIREMENT• Support the mass production capacity of white pipe extrusion • Reduces particulates from TiO2 bulk pigment use in the workplace • Ensure excellent pigment dispersion to meet mechanical pipe properties over an extensive useful life • Compliance with NSF and UL regulations for end application requirements in the building and construction industry LIQUID COLOR CONCENTRATES AND DOSING | AVIENTLEARN MORE KEY REQUIREMENTS Copyright © 2025, Avient Corporation. https://www.avient.com/products/polymer-colorants/liquid-color-concentrates-and-dosing https://www.avient.com/products/polymer-colorants/liquid-color-concentrates-and-dosing https://www.avient.com/products/polymer-colorants/liquid-color-concentrates-and-dosing Slide 1: U-Pvc pipe & fitting Producer

LIQUID METERING SYSTEMS Specifically designed for thermoplastic processes PlanetPak connected to a Transfer pump feeding the Plastic reservoir feeding a Metering pump controlled by a CMG controller LIQUID METERING SYSTEMS SYSTEM DESCRIPTION FlexCart™ metering units & PlanetPak™ containers form the main equipment components of Avient’s proprietary liquid metering systems designed to optimise delivery of Avient liquid colors and additives in the thermoplastic processing industry. What is the normal liquid addition rate? The packaging is designed to effectively contain and transport Avient liquid colors and additives.

Our wide range of MagiQ products can be delivered as a solid masterbatch or liquid concentrate. MAGIQ FIBER COLORANTS - LIQUID Part of our MagiQ Fiber Colorants & Additives brand, and manufactured under ColorMatrix™ Fiber Colorant Solutions, this breakthrough technology combines advanced liquid color formulations with state-of-the-art, high-pressure metering equipment to enable late-stage injection of liquid color for spun-dyed polyester melt. It works by injecting liquid color at high pressure into the polyester melt-flow between the end of the extruder, or melt-pipe, and the spin head.

COLORMATRIX™ FLEXONE™ A Sustainable Solution for Liquid Metering FLEXONE – LIQUID METERING SOLUTION ColorMatrix™ FlexOne™ is a single unit designed to meet current and future liquid metering for a range of applications within the polymer industry. The extremely versatile FlexOne works uniquely with Avient’s patented PlanetPak™ delivery containers to provide liquid metering. The overall system delivers sustainable liquid metering with user-friendly technology, high yield, reduced logistics impact and recyclable packaging.

Hiformer™ Nox™ A4R Liquid Antioxidant Additives Discover Hiformer™ Nox™ A4R Liquid Antioxidant Additives for post-consumer recycling.

LIQUID ANTIMICROBIAL OB TRACER V2 LIQUID ANTIMICROBIAL OB TRACER V3

LIQUID RED 186-R PVC - LIQUID WHITE