ECert - 2024-03-22T110644.362.pdf Page 1 of 10 Validity of this certificate is based on the successful completion of the periodic surveillance audits of the management system defined by the above scope and is contingent upon prompt,written notification to ABS Quality Evaluations, Inc. of significant changes to the management system or components thereof.

Clariant Color Acquisition On July 1, 2020, the Company completed the Clariant Color Acquisition. Other Acquisitions On July 1, 2021, the Company completed its acquisition of Magna Colours Ltd. Other Acquisitions On July 1, 2021, the Company completed its acquisition of Magna Colours Ltd.

In 2023, 127 leaders completed the experience. To date we have completed over 2,000 product carbon footprint calculations. We partnered with EcoVadis and IntegrityNext in order to complete these assessments.

In 2023, 127 leaders completed the experience. To date we have completed over 2,000 product carbon footprint calculations. We partnered with EcoVadis and IntegrityNext in order to complete these assessments.

That’s Avient. 21,000+ CUSTOMERS >75% ARE CUSTOMIZED SOLUTIONS TO UNIQUE SPECIFICATIONS of sales 5 In July 2020, we completed the acquisition of the Clariant Masterbatch business, the largest acquisition in the 20-year history of our company. Operating Income $3,783 $4,300 (1) Financial information is pro forma to include a full year of Clariant Masterbatch business acquisition Previous Guidance Current Guidance $3,783 $4,650 $308 $410 $308 $430 $1.93 $2.80 $1.93 $3.00 (1) (1)(1) (1)(1) (1) $442 $457 $580 $1.74 $1.93 $3.00 FULL YEAR 2019 – 2021 ORGANIC GROWTH 22 Sales Adjusted EBITDA $3,981 $3,783 $4,650 + 17% (1) Financial information is pro forma to include a full year of Clariant Masterbatch business acquisition (1)(1) + 31% + 72% ($ in millions) 2021E Adjusted EBITDA 580$ Free Cash Flow 280$ Total Debt 1,860 Less: Cash (755) Net Debt 1,105$ 2021E Net Debt / Adjusted EBITDA 1.9x 23 BALANCE SHEET • Acquisition of Magna Colours completed on July 1 – expands sustainable solutions portfolio through water-based inks technology • Deleveraging to 1.9x net debt to adjusted EBITDA by the end of 2021 • Driven by record adjusted EBITDA performance and strong free cash flow generation from asset light business • Future cash deployment: M&A, opportunistic share repurchases and balance sheet / continued leverage reduction 3.5x 2.7x 1.9x Net Debt / Adjusted EBITDA (1) Financial information is pro forma to include a full year of Clariant Masterbatch business acquisition SUSTAINABILITY FOR A BETTER TOMORROW • Revenue from sustainable solutions expected to grow 14% in 2021 as our innovation efforts and collaboration with customers continues to accelerate • Investments centered around innovation and global sustainability megatrends o Enabling a circular economy – Technologies that allow for increased use of post-consumer recycled (PCR) material and improve recyclability of plastics o Light-weighting – Composites and CAI applications to reduce weight and material requirements, which minimize energy and carbon emissions o Eco-Conscious – Health and human safety applications as well as Avient’s alternative materials to replace lead, PVC, halogens, BPA and other less eco-friendly options 2016 2017 2018 2019 2020PF** Bio-polymers Reduced Energy Use Human Health & Safety Sustainable Infrastructure VOC Reduction Recycle Solutions Eco-Conscious Lightweighting Revenue From Sustainable Solutions* 2016-2020 $405M $455M *Avient Sustainable Solutions definitions aligned with FTC 2012 Guide for the Use of Environmental Marketing Claims (“Green Guides”) **2020 is Pro Forma to include full year of the Clariant Masterbatch business $340M $550M $790M 25 Key Updates • Includes Clariant Masterbatch performance • Increases disclosures and ESG data • Provides performance updates on 2030 Sustainability Goals • Commits to operational carbon neutrality in 2050 and 100% renewable energy by 2050 (RE 100) • Announces Avient’s participation in U.N. Our free cash flow supports shareholder value creation through investing in R&D for organic growth, completing bolt-on acquisitions, and returning cash to shareholders via our dividend program and opportunistic share repurchases. 30 1.

Acceptance These Terms of Purchase together with the relevant Purchase Order issued by Avient constitute the full understanding of the Parties and is a final, complete and exclusive statement of the terms and conditions of their agreement regarding the supply of Goods and/or performance of Services by Supplier. In addition, Supplier warrants that all Certificates of Origin for the Goods shall be provided to Avient on a timely basis and shall be accurate and complete. Supplier shall complete annual online assessments for CTPAT compliance and to correct any deficiencies in supply chain security identified by either an online assessment or on- site audit.

Please submit your vote and proxy by internet or telephone, or complete, sign, date and return your proxy card or voting instruction card.   Upon completing this assessment, the Compensation Committee also determined that no “conflicts of interest have been raised by the work performed by the Consultant.” In the event of a change of control, cash-settled performance units for which all performance periods are completed as of December 29, 2023 are valued at actual attainment, and cash-settled performance units for which all performance periods are not completed as of December 29, 2023 are valued at target attainment.

IPR&D consists of two projects that we expect to complete during 2013. IPR&D consists of two projects that we expect to complete during 2013. We expect to complete this study by the end of 2013.

In 2023, 127 leaders completed the experience. To date we have completed over 2,000 product carbon footprint calculations. We partnered with EcoVadis and IntegrityNext in order to complete these assessments.

On January 2, 2018, the Company completed the acquisition of IQAP Masterbatch Group S.L. We completed our testing of impairment as of October 1, noting no impairment in 2018, 2017 or 2016. On May 31, 2018, the Company completed the acquisition of PlastiComp, Inc.