Pro Forma Financial Information The Company acquired Avient Protective Materials (“Dyneema”) on September 1, 2022 (the “Acquisition Date”) and sold the Distribution segment on November 1, 2022. ASHISH KHANDPUR PRESIDENT & CEO 7 8 PORTFOLIO TRANSFORMATION 8 46% 66% 87% 100% 0% 20% 40% 60% 80% 100% 2005 2010 2015 2020 2023 % o f A dj us te d EB IT D A Commodity JVs Distribution Performance Products & Solutions Specialty Businesses Adjusted EBITDA from Specialty Applications SUSTAINABILITY AS A GROWTH DRIVER 9 LONG-TERM REVENUE GROWTH DRIVERS Sustainable Solutions Composites, Healthcare, Asia / LATAM Overlap Other 60%+ Key Growth Drivers Total Company Revenue Growth Drivers Long-Term Growth Rate Sustainable Solutions 8–12% Composites 8–10% Healthcare 8–10% Asia / LATAM 5% Other 0–2% Avient 6% END MARKET OBSERVATIONS (% OF COMPANY SALES) ENERGY DEFENSE TELECOMMUNICATIONS HEALTHCARE 10 TRANSPORTATION INDUSTRIAL BUILDING & CONSTRUCTION 9% CONSUMER PACKAGING 23% 11 REGIONAL OBSERVATIONS (% OF COMPANY SALES) 11 Q 4 2023 RE S U LT S Q4 2023 PERFORMANCE VS. The presentation of these measures may be different from non-GAAP financial measures used by other companies.

The question and answer session will follow the company’s presentation and prepared remarks. Each of such adjustments has not yet occurred, are out of the Company's control and/or cannot be reasonably predicted. For the same reasons, the Company is unable to address the probable significance of the unavailable information.

A full copy of Avient’s Code of Conduct is available in over 20 languages and can be found here: Avient’s Position on Human Rights can be found here http://www.polyone.com/ https://www.avient.com/company/policies-and-governance-0/code-conduct https://www.avient.com/sites/default/files/2021-07/avient-human-rights-position-statement-updated-july-2021.pdf Page 2 of 3 Training To mitigate against the risk of non-compliance with our policy, Avient requires all associates to complete mandatory Code of Conduct training. The hotline is operated by an external professional service company and ensures anonymity. Avient currently does not engage in verification of its supply chains to evaluate and address risks of human trafficking and slavery, nor does it currently conduct audits of its suppliers’ compliance with company standards for trafficking and slavery in supply chains.

Avient’s chief operating decision maker uses these financial measures to monitor and evaluate the ongoing performance of the Company and each business segment and to allocate resources. Each of such adjustments has not yet occurred, are out of the Company's control and/or cannot be reasonably predicted. For the same reasons, the Company is unable to address the probable significance of the unavailable information.

The question and answer session will follow the company’s presentation and prepared remarks. Each of such adjustments has not yet occurred, are out of the Company's control and/or cannot be reasonably predicted. For the same reasons, the Company is unable to address the probable significance of the unavailable information.

The company reported third quarter sales of $815.2 million compared to $753.7 million in the prior year quarter. The question and answer session will follow the company’s presentation and prepared remarks. For the same reasons, the Company is unable to address the probable significance of the unavailable information.

The company reported first quarter sales of $826.6 million compared to $829.0 million in the prior year quarter. The question-and-answer session will follow the company’s presentation and prepared remarks. For the same reasons, the Company is unable to address the probable significance of the unavailable information.

Each of such adjustments has not yet occurred, are out of the Company's control and/or cannot be reasonably predicted. For the same reasons, the Company is unable to address the probable significance of the unavailable information. Avient Specialty Other Specialty / Chemical Companies ex .

As the company began to evolve into a specialty company, we focused on putting our customers and their needs first, then looking inward to make a difference. In 2013, the program was extended to the rest of the company globally. Doing so adds value to both the world and our company.

As the company began to evolve into a specialty company, we focused on putting our customers and their needs first, then looking inward to make a difference. In 2013, the program was extended to the rest of the company globally. Doing so adds value to both the world and our company.