NEWS RELEASE FOR IMMEDIATE RELEASE Avient Announces Registration Details for 2023 Sustainability Day CLEVELAND – August 28, 2023 – Avient Corporation (NYSE: AVNT), a leading provider of specialized and sustainable material solutions, has announced registration details for a virtual Sustainability Day for investment professionals on Wednesday, September 20, 2023, from 9 a.m. – 11 a.m. Avient serves a unique role in enabling the sustainability goals of our customers through the application of material science in nearly every end market,” said Jamie A. A recording of the webcast and the slide presentation will be available at avient.com/investors/events-presentations shortly after the live webcast. http://www.avient.com/investors https://sustainabilityday2023.avient.com/ http://www.avient.com/investors https://register.vevent.com/register/BI0b9400e410674b9d9dc80471579b64b9 https://www.avient.com/investors/events-presentations About Avient Avient Corporation (NYSE: AVNT) provides specialized and sustainable material solutions that transform customer challenges into opportunities, bringing new products to life for a better world.

PREPERM™ Solutions for Automotive Radars Millimeter frequencies put the performance of RF materials into a real test. Processing conditions can cause material properties to shift from the values stated in the information. PREPERM materials are also used in these applications: • GNSS antennas • High dielectric constant lenses • V2X communication

The material was formulated specifically for sensitive applications such as still and mineral water. In addition, the material was engineered for good bonding and adhesion to aluminum closures. Brand owners are seeking more easily recycled materials, such as aluminum, and closurelogic’s use of TPE cap liners satisfy all three challenges—water quality, seal integrity and sustainability.

Versaflex™ TPE materials offer great compression set properties for gaskets that need a long lasting seal, and also create durable speaker skins with a silky feel. Today’s portable speaker manufacturers are searching for materials they can count on to protect against water and dust, but they also need durability and expanded design possibilities. Processing conditions can cause material properties to shift from the values stated in the information.

THE SOLUTION In the development of the Caplex PRO-002, Humotech sought a material solution that would provide high torque, flexibility, and durability for key components of the foot. They looked to the engineering team at Avient for material selection and manufacturing guidance. Avient’s team of engineers was very helpful in determining the right materials and refining our manufacturing process,” said Josh Caputo, president and CEO of Humotech.

LIGHTWEIGHT PROTECTION FOR ENHANCED SECURITY & DURABILITY COMPOSITE BALLISTIC PANELS IN CONSTRUCTION PROJECTS Increasing defense budgets Increasing demand for lightweight materials Composite ballistic panels offer varying levels of protection. CORROSION RESISTANCE The materials used in ballistic composites are resistant to corrosion, ensuring long-lasting durability even in harsh environments. GlasArmor™ thermoset materials harden permanently when cured and so are best used in situations where weather and/or temperature can be a factor.

The core parts of filter media are engineered structures produced from PP meltblown nonwoven material. Processing conditions can cause material properties to shift from the values stated in the information. These capture the electret charge that is applied to the meltblown nonwoven material.

Thermoplastics are the preferred material for caps and closures. Processing conditions can cause material properties to shift from the values stated in the information. Avient is a premier provider of specialized and sustainable material solutions and services that transform customer challenges into opportunities.

A fresh look at material options helps align key properties with optimal performance for today’s vehicles. Contact Avient to tap into our material science expertise and comprehensive product development support services to help you bring your ideas to market faster. www.avient.com Copyright © 2020, Avient Corporation. Processing conditions can cause material properties to shift from the values stated in the information.

Sales of our specialty materials into defense, energy, and transportation end markets have shown resilience during these challenging times.” We are looking forward to sharing how and where our material science is helping customers achieve their sustainability goals and the megatrends that are underpinning the future growth of our sustainable solutions portfolio.” They are based on management's expectations that involve a number of business risks and uncertainties, any of which could cause actual results to differ materially from those expressed in or implied by the forward-looking statements.