Avient Extends Recycled TPE Portfolio with Grades Containing up to 60% Recycled Content, Supporting Global Customers Avient’s new reSound™ REC GP 7820 TPE grades highlighted at Fakuma 2024 can be used for overmolded components in consumer electronics, grips for r

Avient Expands Launch of New Recycled TPE Grades to Asia to Support Greater Use of Recycled Materials in Automotive Vehicles Avient expands its recently launched reSound™ REC TPE AF 7210 grades to Asia, offering a range of PCR-based solutions for overmolding PP in demandin

PolyOne Improves Vehicle Interior Air Quality with OnFlex™ LO TPEs DŰSSELDORF, Germany – PolyOne is featuring new OnFlex™ LO thermoplastic elastomers (TPEs) today at K 2016 (Hall 8a, Stand J15K).

How TPEs Can Help Medical and Pharmaceutical Manufacturers Meet Growing Global Demand This white paper details how TPEs can be used to meet global demand for healthcare devices and apparatus

This next generation thermoplastic technology bridges the historic gap in performance between TPEs and silicone, opening up abundant application opportunities,” said Jean-Paul Scheepens, general manager, Americas, Specialty Engineered Materials at PolyOne. Caption: Barricade™ crosslinkable elastomers bridge the gap between TPEs and silicone to deliver high-temperature compression set performance at lighter weight Michelle Maniscalco Senior Manager, Marketing Communications PolyOne Corporation +1 440-930-1988 michelle.maniscalco@avient.com

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. To provide comparable results, the company references “pro forma” financial metrics, which include the business results of Avient Protective Materials for periods prior to the Acquisition Date, as if the transaction occurred on January 1, 2021 and reflect Distribution as a discontinued operation. The Company acquired the Clariant Color business on July 1, 2020.

The company noted that GAAP EPS includes special items (Attachment 3) and intangible amortization expense (Attachment 1). To access Avient’s news library online, please visit www.avient.com/news. https://www.avient.com/news 4 Pro Forma for Acquisition of Avient Protective Materials business (APM) On September 1, 2022, the company acquired DSM’s Protective Materials business, the foundation of which is the renowned technology and globally admired brand of Dyneema®, the World’s Strongest Fiber™. You are advised to consult any further disclosures we make on related subjects in our reports on Form 10-Q, 8-K and 10-K that we provide to the Securities and Exchange Commission. # # # 7 Investor Relations Contact: Giuseppe (Joe) Di Salvo Vice President, Treasurer and Investor Relations Avient Corporation +1 440-930-1921 giuseppe.disalvo@avient.com Media Contact: Kyle G.

ColorMatrix™ Amosorb™ Oxyloop-1 reSound™ Ultra-Low Carbon Footprint TPEs ColorMatrix™ Amosorb™ Oxyloop-1

Dynaflex G - Cooler Feet & Wagon Wheel Tread COOLER MANUFACTURER C O O L E R F E E T & W A G O N W H E E L T R E A D • Abrasion resistance and excellent tear strength • UV and heat stability • Overmoldable to PP or PC • Provided durable TPE materials at target durometers to achieve component-specific performance requirements • Offered rapid response technical support for mold trials and guidance on processing best practices • Delivered consistent material quality globally and with short lead times Dynaflex™ G KEY REQUIREMENTS WHY AVIENT?

EUROPEAN MEDICAL DEVICE MANUFACTURER F A C E M A S K V E N T I L A T I O N V A L V E • ISO 9001 and USP VI compliant • Compatible with overmolding onto PP • Translucent and highly colorable • Soft touch • Provided valuable regulatory support and documentation, enabling faster internal trials and material qualification for this customer • Worked together with customer to select the best material from a broad portfolio of medical TPE grades • Trusted as a polymer supplier for multiple healthcare applications Dynaflex™ G2711 Thermoplastic Elastomer KEY REQUIREMENTS WHY AVIENT?