The resolution was adopted pursuant to Ohio Revised Code section 1701.70(B) (In this space insert the number 1 through 10 to provide basis for adoption.) Check one box below and provide information as required: Complete the following information: Form 540 Prescribed by: POLYONE CORPORATION 1181191 1701.70(B)(6) DOC ID ----> 202018203934 Page 2 of 2Form 540 Last Revised: 06/2019 A copy of the resolution of amendment is attached to this document. I have provided all the necessary information to complete the filing process with our office.

Leveraging this process, these materials provide a strong and stiff final part with extreme temperature resistance. With global production capability and localized support to enhance your development and production processes wherever you are, our team provides you with the information you need to confidently make decisions for achieving your goals. Some of the information arises from laboratory work with small-scale equipment which may not provide a reliable indication of performance or properties obtained or obtainable on larger-scale equipment.

Without giving effect to any impacts from the pending acquisition of Dyneema and potential sale of Avient Distribution, the company provided third quarter adjusted EPS guidance of $0.80, a 14% increase from the prior year quarter, and maintained its full year adjusted EPS guidance of $3.50. Avient will be hosting a webcast on Tuesday, July 26, 2022 to discuss second quarter results and provide more details about the Dyneema acquisition and potential sale of its Distribution business. The Company does not provide reconciliations of forward-looking non-GAAP financial measures, such as outlook for adjusted earnings per share, to the most comparable GAAP financial measures on a forward-looking basis because the Company is unable to provide a meaningful or accurate calculation or estimation of reconciling items and the information is not available without unreasonable effort.

The current macro environment presents several uncertainties related to policy, inflation, foreign exchange and interest rates which provides for a broader set of potential outcomes for the year,” Ms. The Company does not provide reconciliations of forward-looking non-GAAP financial measures, such as adjusted EPS and adjusted EBITDA, to the most comparable GAAP financial measures on a forward-looking basis because the Company is unable to provide a meaningful or accurate calculation or estimation of reconciling items, and the information is not available without unreasonable effort. In doing so, we innovate solutions that help our customers overcome their challenges or capitalize on opportunities provided by the fast- changing world and secular trends.

The company noted net proceeds from the Distribution sale are being used to retire its $600 million 2023 Senior Unsecured Notes and pay down $150 million of its term loan debt as shown below. 3 More details will be provided on the company's third quarter performance and full year outlook during its webcast scheduled for 8:00 a.m. You are advised to consult any further disclosures we make on related subjects in our reports on Form 10-Q, 8-K and 10-K that we provide to the Securities and Exchange Commission. 6 Non-GAAP Financial Measures The Company uses both GAAP (generally accepted accounting principles) and non-GAAP financial measures. The Company does not provide reconciliations of forward-looking non-GAAP financial measures, such as adjusted EPS, to the most comparable GAAP financial measures on a forward-looking basis because the Company is unable to provide a meaningful or accurate calculation or estimation of reconciling items and the information is not available without unreasonable effort.

Registration information to access the Sustainability Day event will be provided in a news release in advance of the event. https://www.avient.com/sustainability 3 Webcast Details Avient will host a webcast on Thursday, July 27, 2023 at 8:00 a.m. The Company does not provide reconciliations of forward-looking non-GAAP financial measures, such as adjusted EPS and adjusted EBITDA, to the most comparable GAAP financial measures on a forward-looking basis because the Company is unable to provide a meaningful or accurate calculation or estimation of reconciling items and the information is not available without unreasonable effort. You are advised to consult any further disclosures we make on related subjects in our reports on Form 10-Q, 8-K and 10-K that we provide to the Securities and Exchange Commission. 6 Investor Relations Contact: Giuseppe (Joe) Di Salvo Vice President, Treasurer and Investor Relations Avient Corporation +1 440-930-1921 giuseppe.disalvo@avient.com Media Contact: Kyle G.

CLEVELAND – November 2, 2023 – Avient Corporation (NYSE: AVNT), a leading provider of specialized and sustainable material solutions, today announced its third quarter 2023 results. The Company does not provide reconciliations of forward-looking non-GAAP financial measures, such as adjusted EPS and adjusted EBITDA, to the most comparable GAAP financial measures on a forward-looking basis because the Company is unable to provide a meaningful or accurate calculation or estimation of reconciling items and the information is not available without unreasonable effort. You are advised to consult any further disclosures we make on related subjects in our reports on Form 10-Q, 8-K and 10-K that we provide to the Securities and Exchange Commission. 6 Investor Relations Contact: Giuseppe (Joe) Di Salvo Vice President, Treasurer and Investor Relations Avient Corporation +1 440-930-1921 giuseppe.disalvo@avient.com Media Contact: Kyle G.

Any samples or developmental material provided by Seller are provided “AS IS” with no warranty as to its performance and such samples or materials shall not create any warranty by sample, which is hereby waived. The act of providing a sample or developmental material does not operate as permission, recommendation, or inducement to practice any patented invention without permission of the patent owner. 5. Seller reserves to itself all applicable duty drawback allowances, and Buyer shall provide assistance in connection with Seller’s application for the same. 11.

Any samples or developmental material provided by Seller are provided “AS IS” with no warranty as to its performance and such samples or materials shall not create any warranty by sample, which is hereby waived. The act of providing a sample or developmental material does not operate as permission, recommendation, or inducement to practice any patented invention without permission of the patent owner. 5. Seller reserves to itself all applicable duty drawback allowances, and Buyer shall provide assistance in connection with Seller’s application for the same. 11.

LIMITED WARRANTY Subject to paragraph 3, and unless otherwise expressly provided herein, Seller warrants good and free title and that the Product will conform to Seller's published specifications, if any, or those other quality standards and/or measurements set forth herein. Subject to the foregoing, and except as otherwise expressly provided herein, Seller makes no representation or warranty of any kind with respect to the Product, express or implied, relating to merchantability or fitness for any particular purpose. All representations and warranties provided by applicable laws are expressly excluded and contractually waived. 3.