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LTD EDITION BLACK/248 HABS LTD EDITION BLACK 923202/248 LTD EDITION BLACK 923202/248

The webcast can be viewed live at avient.com/investors, or by clicking here: https://edge.media-server.com/mmc/p/waapf8vc.   View original content to download multimedia:https://www.prnewswire.com/news-releases/avient-to-hold-first-quarter-2022-conference-call-301526223.html Proxy Statement Download

The webcast can be viewed live at avient.com/investors, or by clicking here: https://edge.media-server.com/mmc/p/k7okojz2.   View original content to download multimedia:https://www.prnewswire.com/news-releases/avient-to-hold-fourth-quarter-2021-conference-call-301457938.html Proxy Statement Download

The webcast can be viewed live at avient.com/investors, or by clicking here: https://edge.media-server.com/mmc/p/yrq7mgm9.   View original content to download multimedia:https://www.prnewswire.com/news-releases/avient-to-hold-third-quarter-2021-conference-call-301394534.html Proxy Statement Download

The webcast can be viewed live at avient.com/investors, or by clicking here: https://edge.media-server.com/mmc/p/eaivs28r.   View original content to download multimedia:http://www.prnewswire.com/news-releases/avient-to-hold-first-quarter-2021-conference-call-301269161.html Proxy Statement Download

at avient.com/investors, or by clicking here: https://edge.media-server.com/mmc/p/ko4y5g9z. View original content to download multimedia:http://www.prnewswire.com/news-releases/avient-to-hold-webcast-on-february-9-2021-to-review-fourth-quarter-2020-results-and-2021-outlook-301217708.html Proxy Statement Download

MSC Certificate Place and date: For the issuing office: Shanghai, 20 March 2024 DNV - Business Assurance Building 9, No. 1591 Hongqiao Road, Changning DistrictShanghai China 200336 Zhu Hai Ming Management Representative Lack of fulfilment of conditions as set out in the Certification Agreement may render this Certificate invalid. Park, China (Shanghai) Pilot Free Trade Zone, Shanghai, China 201203 and the sites as mentioned in the appendix accompanying this certificate has been found to conform to the Quality Management System standard: GB/T 19001-2016 / ISO 9001:2015 This certificate is valid for the following scope: Design and Manufacture of Colour and Additive Concentrates http://www.dnv.com/assurance Certificate no.: 7071-1998-AQ-RGC-RvA Place and date: Shanghai, 20 March 2024 Lack of fulfilment of conditions as set out in the Certification Agreement may render this Certificate invalid. Park, China (Shanghai) Pilot Free Trade Zone, Shanghai, China 201203 Design and Manufacture of Colour and Additive Concentrates http://www.dnv.com/assurance

Full year 2024 adjusted EPS was $2.66 compared to $2.36 in the prior year. https://www.avient.com/investors https://edge.media-server.com/mmc/p/rgfk7qte/ https://www.avient.com/investors https://register.vevent.com/register/BIf718eaf1419a4d83a527f0aba7b74d90 https://www.avient.com/investors/events-presentations 4 Non-GAAP Financial Measures The Company uses both GAAP (generally accepted accounting principles) and non-GAAP financial measures. The non-GAAP financial measures include organic performance (which excludes the impact of foreign exchange), adjusted EPS, adjusted operating income, adjusted EBITDA, adjusted EBITDA margins, free cash flow and adjusted free cash flow.