Homepage // News Center // Premium Sporting Knife Manufacturer Relies on PolyOne’s Bergamid™ Nylon to Extend its Brand Message Designers selected a custom grade of Bergamid™ high performance polymer from PolyOne for the sheath. About PolyOne PolyOne Corporation, with 2016 revenues of $3.3 billion, is a premier provider of specialized polymer materials, services and solutions.

Homepage // News Center // PolyOne Helps Schneider Electric Satisfy Global Demand for Affordable, Sustainable Light and Power About PolyOne To access PolyOne’s news library online, please go to www.polyone.com/news.

In addition, entities such as trusts, foundations, partnerships, estates or other groups over which an employee has control may not buy or sell Company securities while the employee is in possession of such Inside Information. In order to ensure compliance with the policy, the Board of Directors of the Company has adopted the following additional procedures, which apply to (a) directors, officers and certain employees and representatives of the Company and of its affiliates, as specified in Annex A (“Covered Employees”), and (b) members of their immediate families, partnerships in which Covered Employees are a general partner; corporations in which Covered Employees, either singly or together with other Related Persons (as defined below), own a controlling interest; trusts of which Covered Employees are a trustee, settlor or beneficiary; estates of which Covered Employees are an executor or beneficiary; or any other group or entity where Covered Employees have or share with others the power to decide whether to buy Company securities (collectively, “Related Persons”). Revised: December 20, 2024 ANNEX A COVERED EMPLOYEES All Directors All Elected Officers All Appointed Officers Assistant Controller Executive Assistants to Covered Employees Corporate Communications/Investor Relations (all levels) Internal Audit VP, Directors, Managers and Staff of Audit (all levels), Tax Managers and Tax Analysts, Staff of Tax (all levels) Directors, Managers and Staff, Mergers and Acquisitions and functional professionals supporting Mergers and Acquisitions (including Legal professionals) All Other Employees (including Finance and IT employees) with access to full quarterly results within the Avient Systems Secretaries and Direct-Reporting Assistants to any Covered Employee Financial and Business Consultants who have undertaken to comply with this policy Revised: December 20, 2024 ANNEX B Please access the PeopleLink home page and search for “pre-clearance” after clicking “My Help” General Counsel: Amy M.

Homepage // News Center // PolyOne Unveils InVisiOSM Color Inspiration 2017 About PolyOne PolyOne Corporation, with 2014 revenues of $3.8 billion, is a premier provider of specialized polymer materials, services and solutions. To access PolyOne’s news library online, please go to www.polyone.com/news

Homepage // News Center // PolyOne Specialty Coatings and Inks Kennesaw, GA Plant Achieves ISO 9001-2008 Certification About PolyOne PolyOne Corporation, with 2015 revenues of $3.4 billion, is a premier provider of specialized polymer materials, services and solutions. To access PolyOne’s news library online, please go to www.polyone.com/news

And in 2019 these leaders also focused internally, as six years of NextGen alumni collaborated to create and launch ENGAGE, a new initiative that helps better connect our associates at every PolyOne manufacturing site around the world to PolyOne’s important purpose, culture and impact on sustainability. And that’s what we do at PolyOne. THIS PAGE IS NOT PART OF POLYONE’S FORM 10-K FILING THIS PAGE IS NOT PART OF POLYONE’S FORM 10-K FILINGTHIS PAGE IS NOT PART OF POLYONE’S FORM 10-K FILING ROBERT M.

ANAHEIM, Calif. – PolyOne Advanced Composites, a new platform within PolyOne’s Specialty Engineered Materials business, is exhibiting for the first time at CAMX 2016, a premier composites industry event. About PolyOne PolyOne Corporation, with 2015 revenues of $3.4 billion, is a premier provider of specialized polymer materials, services and solutions. Photo Caption: Matt Borowiec, general manager, PolyOne Advanced Composites Photo ©PolyOne

Homepage // News Center // PolyOne Appoints Uniflon Performance Additives as a Colorant Chromatics Distributor in Brazil About PolyOne To access PolyOne’s news library online, please go to www.polyone.com/news

To learn more, visit PolyOne at Fakuma 2018 in Hall B5, Booth 5316. About PolyOne To access PolyOne’s news library online, please go to www.polyone.com/news

Homepage // News Center // PolyOne Introduces Excelite™ IM Chemical Foaming Additives for Injection Molding About PolyOne To access PolyOne’s news library online, please go to www.polyone.com/news