Event Type: Earnings Conference Call Q1 Avient Corporation Earnings Conference Call More Q4 Avient Corporation Earnings Conference Call More

The non-GAAP financial measures include: adjusted Earnings Per Share, adjusted Operating Income, net debt / adjusted EBITDA, and adjusted EBITDA. To provide comparable results, the company references “pro forma” financial metrics, which include the business results of Avient Protective Materials for periods prior to the Acquisition Date, as if the transaction occurred on January 1, 2021 and reflect Distribution as a discontinued operation. The Q3 2022 "Pro Forma APM" adjustments reflect periods prior to the acquisition date and are preliminary estimates for APM’s results for the months of July and August. 3 AVNT Q3 2022 Earnings Presentation - Website v2.pdf AVNT Q3 2022 Earnings Presentation - Website Update.pdf AVNT Q3 2022 Earnings Presentation - Website.pdf 11.7 823am IR Deck - AVNT-2022.09.30 (002).pdf

1) Adjusted earnings per share reported in this proxy statement diffeff rs from what is reported under United States Generally Accepted Accounting Principles (“GAAP”). 2) Adjusted earnings per share and adjusted operating income forff consolidated PolyOne reported in this proxy statement differ from what is reported under United States GAAP. Therefore, the amount reported for Mr.

July 1, 2020 July 1, 2020 July 13, 2020

Aug 2020 Aug 2020 Aug 2020

Senior Vice President and Chief Financial Officer, May 2008 to January 2011. Kahler: Senior Vice President, Chief Commercial Officer, January 2010 to date. Senior Vice President, Commercial Development, May 2006 to January 2010.

Recognized by Prestigious Rankings We were honored to earn prominent places in prestigious corporate rankings in 2022. Our progress in leadership diversity, employee safety, and community engagement helped us earn these recognitions. And our investments in innovation, composites, and sustainable solutions has significantly increased the overall earnings profile of the company, which will lead to long-term value creation for our company.

April 29, 2020 April 29, 2020 April 7, 2020

August 24, 2020 July 22, 2020 July 7, 2020

The FATCA code(s) entered on this form (if any) indicating that I am exempt from FATCA reporting is correct. You must cross out item 2 above if you have been notified by the IRS that you are currently subject to backup withholding because you have failed to report all interest and dividends on your tax return. No. 10231X Form W-9 (Rev. 10-2018) AVIENT CORPORATION ✔ 5 D 33587 WALKER ROAD AVON LAKE, OH 44012 3 4 1 7 3 0 4 8 8 7/20/2020