We expect seasonality of the business to play out in the third quarter and estimate sales of $1.15 billion and adjusted EPS of $0.68. Eastern Time on July 30, 2021. 3 *Pro Forma The company acquired the Clariant Masterbatch business (“CMB”) on July 1, 2020 (the “Acquisition Date”). Management believes this provides better comparability of the performance of the combined businesses.

If Buyer has a dispute with respect to an invoice, Buyer must notify Seller within seven (7) business days after the date of invoice. These Terms and the contract they form part of shall be exclusively governed by and construed in accordance with the substantive laws of Switzerland, with the exclusion of the United Nations Convention on Contracts for the International Sale of Goods (“CISG”) dated 11 April 1980 and the Swiss law rules on the conflict-of-laws.

If Buyer has a dispute with respect to an invoice, Buyer must notify Seller within seven (7) business days after the date of invoice. The United Nations Convention respecting Contracts for the International Sale of Goods shall not apply to sales under these Terms. 21.

If Buyer has a dispute with respect to an invoice, Buyer must notify Seller within seven (7) business days after the date of invoice. The United Nations Convention respecting Contracts for the International Sale of Goods shall not apply to sales under these Terms. 21.

If Buyer has a dispute with respect to an invoice, Buyer must notify Seller within seven (7) business days after the date of invoice. The United Nations Convention respecting Contracts for the International Sale of Goods shall not apply to sales under these Terms. 21.

If Buyer has a dispute with respect to an invoice, Buyer must notify Seller within seven (7) business days after the date of invoice. The United Nations Convention respecting Contracts for the International Sale of Goods shall not apply to sales under these Terms. 21.

Automotive design engineers are working to develop the next-generation of EVs, hybrids, and autonomous vehicles to improve their functionality, efficiency, safety, and performance. The development of vehicle electrification also includes battery technologies ranging from enclosures, brackets, and cooling systems to state-of-the-art charging infrastructure. Advanced design and technical services to optimize part design and reduce development costs 

They are based on management’s expectations that involve a number of business risks and uncertainties, any of which could cause actual results to differ materially from those expressed in or implied by the forward-looking statements. Factors that could cause actual results to differ materially from those implied by these forward-looking statements include, but are not limited to: • Disruptions, uncertainty or volatility in the credit markets that could adversely impact the availability of credit already arranged and the availability and cost of credit in the future; • The effect on foreign operations of currency fluctuations, tariffs and other political, economic and regulatory risks; • Disruptions or inefficiencies in our supply chain, logistics, or operations; • Changes in laws and regulations in jurisdictions where we conduct business, including with respect to plastics and climate change; • Fluctuations in raw material prices, quality and supply, and in energy prices and supply; • Demand for our products and services; • Production outages or material costs associated with scheduled or unscheduled maintenance programs; • Unanticipated developments that could occur with respect to contingencies such as litigation and environmental matters; • Our ability to pay regular quarterly cash dividends and the amounts and timing of any future dividends; • Information systems failures and cyberattacks; • Amounts for cash and non-cash charges related to restructuring plans that may differ from original estimates, including because of timing changes associated with the underlying actions; • Our ability to achieve strategic objectives and successfully integrate acquisitions, including the implementation of a cloud-based enterprise resource planning system, S/4HANA; • Other factors affecting our business beyond our control, including without limitation, changes in the general economy, changes in interest rates, changes in the rate of inflation, geopolitical conflicts and any recessionary conditions; and • Other factors described in our Annual Report on Form 10-K for the year ended December 31, 2023 under Item 1A, “Risk Factors.” Avient’s chief operating decision maker uses these financial measures to monitor and evaluate the ongoing performance of Avient and each business segment and to allocate resources.

Leadership, EHS&S-PS, Facility Services, Design & Development, Information Technology, Sourcing, Logistics, Legal, and Human Resources Certificate No: 65537 Certification Date: 29 SEP 2023 Effective Date: 27 FEB 2025 Expiration Date: 27 SEP 2026 Revision Date: 05 MAR 2025 Dominic Townsend, President Copyright as of the Effective Date, ABS Quality Evaluations, Inc. Leadership, EHS&S-PS, Facility Services, Design & Development, Information Technology, Sourcing, Logistics, Legal, and Human Resources 33587 Walker Road Avon Lake OH 44012 United States Avient Corporation HQ Responsible Care Corporate Support Activities in Sr. Unit 3 Dodworth Business Park, Dodworth Barnsley South Yorkshire S75 3SP United Kingdom ISO 14001:2015 Certificate Of Conformance ANNEX Certificate No: 65537 Avient Corporation At the below facilities FACILITY NAME FACILITY ACTIVITY ADDRESS Copyright as of the Effective Date, ABS Quality Evaluations, Inc.

GLS International, Rilland, Netherlands GLS Corporation, 833 Ridgeview Drive, McHenry, IL 60050 Tel: 815-385-8500 Fax: 815-385-8533 email: info@glscorp.com Web: www.glscorp.com BIOGRAPHICAL NOTE John Simons is currently employed by GLS International Inc. as Business Manager Europe. Over the years his responsibilities at Verbunt Chemie included: Product Development, Quality Management, and Purchasing. EXPERIMENTAL Material Two classes of “universal overmolding TPEs” have been developed and used in this study.