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. 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.

Some of the information arises from laboratory work with small-scale equipment which may not provide a reliable indication of performance or properties obtained or obtainable on larger-scale equipment. MECHANICAL RECYCLING TESTING FACILITY Our CycleWorks™ Innovation Center in Italy provides the necessary research environment to test and evaluate plastic recycling in real-world conditions.

Amosorb 4020L allows for LDR dosages that will provide long-lasting shelf life together with very good bottle aesthetics and unbeatable recyclability versus alternative solutions in clear monolayer applications. Some of the information arises from laboratory work with small-scale equipment which may not provide a reliable indication of performance or properties obtained or obtainable on larger-scale equipment.

Several grades of Gravi-Tech composites used for radiation- shielding applications provide protections similar to traditional lead-based materials, yet these Gravi-Tech polymer-metal composites are 37 percent lighter. Some of the information arises from laboratory work with small-scale equipment which may not provide a reliable indication of performance or properties obtained or obtainable on larger-scale equipment.

Our solutions can be functionalized to provide characteristics including electrical insulation, thermal insulation, radiopacity, low thermal expansion, flexural memory, and load damping, while delivering desired performance and aesthetic specifications. They are engineered to provide simplified installation, long service life, and overall cost effectiveness. Some of the information arises from laboratory work with small-scale equipment which may not provide a reliable indication of performance or properties obtained or obtainable on larger-scale equipment.

Avoid the use styrenic materials – Low shrinkage PP grades provide an ABS alternative. Evenly distribute the weight – Injection-moldable Gravi-Tech material provides consistent weight distribution across the packaging component. Some of the information arises from laboratory work with small-scale equipment which may not provide a reliable indication of performance or properties obtained or obtainable on larger-scale equipment.

These resin sources provide sustainable options for applications that require excellent structural and toughness capabilities while offering comparable performance to standard long fiber materials. Additionally, longer filaments of fiber provide more stiffness and strength to support weight loads and exceptional impact and fatigue resistance to endure rigorous usage environments. Some of the information arises from laboratory work with small-scale equipment which may not provide a reliable indication of performance or properties obtained or obtainable on larger-scale equipment.

Depending on the application, Nylon Polyamide and polyester can provide higher stretch properties if desired. • Kinking Unlike steel wire, synthetic fibers do not kink, resulting in a safer and longer-lasting product. K58220T N/A Kevlar® 2480 LBs (1125 KGs) 230 FT/LB (154 M/KG) Flat 2.81 mm N/A Strength member in cable application Product ID FIBER-LINE® Polymer Jacket Base Fiber Break Strength Yield Geometry Nominal Diameter Description 13.75mm K/Hytrel Hytrel Jacket Kevlar® 29000 LBs (13154 KGs) 138 KGs/KM Round 13.75mm Kevlar rope w/ Hytrel extruded jacket 12.5mm K/TPU TPU jacket Kevlar® 24000 LBs (10885 KGs) 115 KGs/KM Round 12.5mm Kevlar rope w/ Hytrel extruded jacket 7.87mm K/MDPE MDPE Jacket Kevlar® 24000 LBs (10885 KGs) 50 KGs/KM Round 7.87mm Kevlar w/ MDPE extruded jacket .58mm C/PU TPU jacket Carbon 74 LBs (33.6 KGs) N/A Round/ Flat .58mm Carbon w/ TPU extruded jacket 4.50mm K/HDPE HDPE jacket Kevlar® 2000 LBs (907 KGs) 16 KGs/KM Round 4.06 mm Kevlar w/ HDPE extruded jacket POPULAR JACKETED STRENGTH MEMBERS MOVING HIGH PERFORMANCE FIBERS FORWARD This data is provided for informational purposes only, and does not constitute a specification. For over 25 years, FIBER-LINE® has provided science- driven expertise that improves the performance and the end-use processing of high performance fibers.

Apex’s sole responsibility was to provide independent verification on the accuracy of the GHG emissions reported, and on the underlying systems and processes used to collect, analyze and review the information. 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. Cleveland, Ohio Doral, Florida September 25, 2024 This verification declaration including the opinion expressed herein, is provided to Avient and is solely for the benefit of Avient in accordance with the terms of our agreement.

Leveraging this process, these materials provide a strong and stiff final part with extreme temperature resistance. With global production capability and localized support to enhance your development and production processes wherever you are, our team provides you with the information you need to confidently make decisions for achieving your goals. Some of the information arises from laboratory work with small-scale equipment which may not provide a reliable indication of performance or properties obtained or obtainable on larger-scale equipment.