AVIENT CORPORATION I N V E S T O R P R E S E N T A T I O N (NYSE: AVNT) AU G U S T 2 0 2 2 DISCLAIMER Forward-Looking Statements Certain statements contained in or incorporated by reference into this presentation constitute “forward-looking statements” within the meaning of the Private Securities Litigation Reform Act of 1995. We partner with Brand Owners / OEMs, processors and assemblers to enable their goals in applications like packaging, healthcare, consumer goods, transportation, wire & cable, building & construction and textiles. EPS (ex Amort) 3.96$ 0.13$ 4.09$ (0.58)$ 3.51$ Pro Forma Leverage (12/31/2022E) Net Debt / Adjusted EBITDA 1.6x 3.4x 2.8x Forecast Dyneema Forecast + Dyneema Sale of Distribution Pro Forma 2022 TWO-YEAR LEVERAGE MODEL 20 3.5x 2.7x 1.6x 2.8x 2.4x 2.0x 2019PF 2020PF 2022E 2022PF 2023E 2024E Dyneema® AcquisitionClariant Color Acquisition (1) Pro forma for the acquisition of the Clariant Color business (2) Pro forma for the acquisition of Dyneema® and potential divestiture of Distribution, including repayment of senior notes due 2023 and Term Loan (1) (1) (2) OUR SPECIALTY JOURNEY CONTINUES 21 • Dyneema® brings leading technology and brand with the World’s Strongest Fiber™, deep history of application development and strong management team focused on specialty applications • Dyneema® transaction is aligned with our previously stated acquisition goal of expanding our composites and fiber capabilities • Similar to our other technology expansion acquisitions, Dyneema® allows us to leverage our invest-to-grow strategy • The possible sale of our Distribution business also presents potential benefits with respect to leverage and EBITDA margins 46% 66% 86% 100% 0% 40% 60% 80% 100% 2005 2010 2015 2021 2022 PF % o f A dj us te d EB IT D A(1 ) JVs Distribution Performance Products & Solutions Specialty (1) Adjusted EBITDA is EBITDA excluding corporate costs and special items (2) Pro forma for the acquisition of Dyneema® and potential divestiture of Distribution (2) Building & 43% 14% Telecom. 2006 2022 Pro forma Building & Telecom.

Avient Wire & Cable Industry Bulletin Overview of how Avient serves wire & cable customers, highlighting both power and data cables technologies Wire & Cable Colorants: OnColor™

PolyOne’s ECCOH™ low-smoke and fume, non-halogen flame-retardant material for wire and cable enabled Keystone to quickly manufacture and deliver medium- and low-voltage power cables that complied with safety, performance, reliability and environmental requirements. Its main product lines include copper wire, building wire, low- and medium-voltage power cable, control cable and telecommunication cable. Keystone is a qualified cable supplier to public companies.

EU Regulation No 528/2012 states that cable manufacturers in Europe can only use masterbatch additives that are authorized by BPR. In fact, no material supplier or cable manufacturer can compete in the European marketplace without this official authorization. In the past, toxic chemicals such as rodenticides were utilized in cable jacketing materials, but these caused concerns regarding human safety.

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Avient Solutions for Fiber Optic Cable Avient Wire & Cable Industry Bulletin Overview of how Avient serves wire & cable customers, highlighting both power and data cables technologies

ECCOH LSFOH 5983 for Power Cable Jacket ECCOH LSFOH 5806 for Power Cable Jacket Flame Retardant Sheath for Riser Cable

ECCOH LSFOH 5983 for Power Cable Jacket ECCOH LSFOH 5806 for Power Cable Jacket Flame Retardant Sheath for Riser Cable