ABS Quality Evaluations This is to certify that the Quality Management System of: Avient Corporation Avient Corporation - Avon Lake 33587 Walker Road Avon Lake, OH 44012 U.S.A. WITH ADDITIONAL FACILITIES LISTED ON ATTACHED ANNEX) Certificate Of Conformance has been assessed by ABS Quality Evaluations, Inc. and found to be in conformance with the requirements set forth by: Page 2 of 10 ABS Quality Evaluations Avient Corporation ISO 9001:2015 Certificate Of Conformance ANNEX At Below Facilities: Validity of this certificate may be confirmed at www.abs-qe.com/cert_validation. Industri Kecil & Sederhana Simpang Ampat, Penang 14120 Malaysia Activity: Central Office, Administration, Site management (Facitilities, EHS), Marketing and Sales, SCM, Group Procurement Services, GBS and Logistics, GTI-Engineering and R&D, Technical Application Laboratories, Legal, Finance, HR, IT, RSRA, SMD and Learning, Communication Activity: Administration, Site management, Manufacture, Laboratory, Procurement, Maintenance, Infrastructure, Warehouse and Transport Facility: Avient Colorants MX S.A. de C.V.

Avient Corporation. For the same reasons, Avient is unable to address the probable significance of the unavailable information. Avient Corporation.

Avient Corporation. For the same reasons, Avient is unable to address the probable significance of the unavailable information. 3Copyright © . Avient Corporation.

Avient Corporation. For the same reasons, Avient is unable to address the probable significance of the unavailable information. 3Copyright © . Avient Corporation.

Microsoft PowerPoint - AVNT Q3 2022 Earnings Presentation AVIENT CORPORATION T H I R D Q U A R T E R 2 0 2 2 R E S U L T S (NYSE: AVNT) N OV E M B E R 2 , 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. For the same reasons, Avient is unable to address the probable significance of the unavailable information. Ops Pro Forma Adjusted EPS (in millions) (in millions) 20 SUMMARY • Executed the plans we laid out earlier this year • Completed the Dyneema acquisition and Distribution divestiture amid challenging market conditions • Paid down debt and expect to finish the year modestly levered at 3.1x net debt to 2022 pro forma adjusted EBITDA • Expect $200 million of free cash flow in 2022 • Entering an economic slowdown with a portfolio that is better positioned than ever before • Updated our EPS guidance to $2.60 from continuing operations SEGMENT DATA U.S. & Canada 40% EMEA 35% Asia 20% Latin America 5% 2022 PRO FORMA SEGMENT, END MARKET AND GEOGRAPHY GEOGRAPHY REVENUESEGMENT FINANCIALS Consumer 21% Packaging 23% Industrial 15% Building and Construction 10% Telecommunications 4% Energy 4% Defense 6% END MARKET REVENUE (1) Total company adjusted EBITDA of $585M includes corporate costs.

Avient Corporation. For the same reasons, Avient is unable to address the probable significance of the unavailable information. 3Copyright © . Avient Corporation.

Certificate - ISO 9001 - Avient Corporation - 337726 - 23521667 (1).pdf

TERMS AND CONDITIONS These Terms and Conditions govern the sale of Products to another (“Buyer”) by Avient Corporation and its affiliates (“Seller”). 1. Department of the Treasury’s Office of Foreign Assets Control (“Trade Control Laws”).

TERMS AND CONDITIONS These Terms and Conditions govern the sale of Products to another (“Buyer”) by Avient Corporation and its affiliates (“Seller”). 1. Department of the Treasury’s Office of Foreign Assets Control, and the Control of Exports Act 2008 (as may be amended, modified or replaced) (“Trade Control Laws”).

TERMS AND CONDITIONS These Terms and Conditions govern the sale of Products to another (“Buyer”) by Avient Corporation and its affiliates (“Seller”). 1. Department of the Treasury’s Office of Foreign Assets Control (“Trade Control Laws”).