The company noted that GAAP EPS includes special items (Attachment 3) and intangible amortization expense (Attachment 1). 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™. https://www.avient.com/investors https://edge.media-server.com/mmc/p/a8tcrg4m https://www.avient.com/investors https://register.vevent.com/register/BI125445d5780d4c898d63ec3c1fa53045 https://www.avient.com/investors/events-presentations 5 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.

Webcast Details The webcast can be viewed live at avient.com/investors, or by clicking here: https://edge.media- server.com/mmc/p/yrq7mgm9.To participate in the audio-only portion of the call, dial 1-844-835- 7433 (domestic) or 1-914-495-8589 (international) and provide conference ID number 7899765. To access, dial 1-855-859-2056 (domestic) or 1-404-537-3406 (international) and provide conference ID number 7899765. http://www.avient.com/investors https://edge.media-server.com/mmc/p/yrq7mgm9 https://edge.media-server.com/mmc/p/yrq7mgm9 http://www.avient.com/investors 3 Full Year Comparisons Pro Forma for Acquisition of Clariant’s Color Business The company acquired Clariant’s color (“Clariant Color”) business on July 1, 2020 (the “Acquisition Date”).

https://www.avient.com/products/vinyl-formulations/vinyl-plastisols-organosols/core-vinyl-plastisols-healthcare https://www.avient.com/products/polymer-colorants/colorant-dispersions/colorants-liquid-silicone-rubber Slide 1: Medical device manufacturer

GAAP EPS includes $0.21 of special items (see Attachment 3) and $0.18 of intangible amortization expense (see Attachment 1). https://www.avient.com/investors https://edge.media-server.com/mmc/p/d4zy5fep https://www.avient.com/investors https://register.vevent.com/register/BI2f6c5ad2bc1b4150b7f39a5b024d27cf https://www.avient.com/investors/events-presentations https://www.avient.com/news-events 4 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. For more information, visit https://www.avient.com.

AVIENT SOLUTION SUSTAINABILITY + AESTHETICS LEARN MORE Avient Corporation 1 https://www.avient.com/products/polymer-colorants/high-temperature-color-concentrates/colorant-chromatics-metallic-effect-pre-colored-sulfone-colorants Slide 1: Aviation COMPONENTs manufacturer

TIER 1 SUPPLIER S T E E R I N G C O L U M N B R A C K E T & L E V E R • Automotive OEM lightweighting initiative • Trial alternative materials to replace aluminum support bracket and overmolded steel adjustment lever • Up to 5,200 Newton load requirements with minimal deflection allowance • High stiffness & strength to function similar to metal • Achieved 50% weight reduction with metal to composite conversion • Provided structural design & fiber orientation consultations along with CAE analysis to predict performance met requirements • Shortened manufacturing lead time by supplying injection molded material solution Complēt Long Carbon Fiber Nylon Composite KEY REQUIREMENTS WHY AVIENT? https://www.avient.com/products/long-fiber-technology/long-fiber-technologies/compl-t-long-fiber-reinforced-structural-thermoplastics Slide 1: Tier 1 Supplier

AUTOMOTIVE MOLDER TIER 1 E L E C T R O N I C C A R D R E A D E R P A R T F O R M U L T I M E D I A H U B • Aluminum replacement • Good mechanical properties • PP with 40% Long Glass Fiber • Meet the strict automotive OEM specification • Designed a material solution to obtain all critical mechanical criteria and supply the OEM in a short timeframe • Delivered tailored strategy while offering global reach OnForce Long Fiber Reinforced Thermoplastic Formulations KEY REQUIREMENTS WHY AVIENT? https://www.avient.com/products/long-fiber-technology/long-fiber-technologies/onforce-long-glass-fiber-reinforced-polypropylene-composites Default Section Slide 1: Automotive Molder tier 1

AS9100 Certication DEKRA CERTIFICATE Certificate Number: 131789.01 The Aerospace Quality Management System and implementation of: Fiber-Line, LLC With Central Functions At: 3050 Campus Drive Hatfield, PA 19440 United States The certification has been performed in accordance with the requirements of AS9104/1:2012, including its implementation, and meets the requirements of the standard: AS9100D (Based on and including ISO 9001:2015) Scope: The value added design and development of synthetic fiber products for use in public and private sectors. Onus Managing Director DEKRA Certification, Inc. 1945 The Exchange SE #300 Atlanta, GA 30339 USA (215) 997-4519 https://www.dekra.us/en/audits/ DEKRA Certification Inc. is an accredited Aerospace Registration Management Program Certification Body, under the ICOP scheme. https://www.dekra.us/en/audits/

Information Systems Use Policy Effective date: September 1, 2021 Available on the Avient Ethics & Corporate Policies Page on the Loop Confidential 2 Avient IT Department Information Systems Use Policy September 1, 2021 Table of Contents Purpose .......................................................................................................................................................... 3 Scope.............................................................................................................................................................. 3 Usage ............................................................................................................................................................. 3 Expectations for Use of Information Systems ........................................................................................... 3 Prohibited Uses of Information Systems ................................................................................................... 3 Personal Use .............................................................................................................................................. 4 Social Media .............................................................................................................................................. 4 Enforcement and Monitoring ......................................................................................................................... 4 Questions and Additional Information .......................................................................................................... 5 Document Change and Review History ........................................................................................................ 5 Appendix A: Definitions................................................................................................................................ 6 Confidential 3 Avient IT Department Information Systems Use Policy September 1, 2021 PURPOSE This Information Systems Use Policy (“Policy”) establishes acceptable and prohibited uses of Avient’s Information Systems to protect Avient and its employees and affiliates from both intentionally and unintentionally harmful actions by Users. Confidential 5 Avient IT Department Information Systems Use Policy September 1, 2021 QUESTIONS AND ADDITIONAL INFORMATION For additional details regarding cybersecurity and incidence response, please refer to Avient’s Cyber and Data Incident Response Policy. http://polynet/ethics/Portals/23/documents/Cyber%20and%20Data%20Incident%20Response%20Policy/Cyber_Incident_Response_Policy-September%202018_EN%20-%20v1.pdf http://polynet/ethics/Portals/23/documents/Cyber%20and%20Data%20Incident%20Response%20Policy/Cyber_Incident_Response_Policy-September%202018_EN%20-%20v1.pdf Confidential 6 Avient IT Department Information Systems Use Policy September 1, 2021 APPENDIX A: DEFINITIONS In addition to those terms defined within the body of this Policy, the following definitions are used: “Avient Data” – includes (a) all data and information generated, stored, collected, or processed by Avient through Information Systems; (b) all information under the control of Avient and originating from, belonging to, or received from customers, suppliers, or third parties; (c) all data and information regarding intellectual property of Avient; and (d) purely intra-Avient information connected to individual employees, such as Information System usernames, passwords, and company ID.

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