PolyOne Corporation - TS 691920 Certificate of Registration QUALITY MANAGEMENT SYSTEM - IATF 16949:2016 This is to certify that: PolyOne Corporation 4921 I D A Park Drive Lockport New York 14094 operates a Quality Management System which complies with the requirements of IATF 16949:2016 for the following scope: Design and Manufacture of thermoplastic compounds. CertificateNumber=TS+691920&ReIssueDate=10%2f05%2f2018&Template=inc PolyOne Corporation 4921 I D A Park Drive Lockport New York 14094 Manufacture of thermoplastic compounds. Including the following support activities: PolyOne Design Center (Solution Center) 33567 Walker Road Avon Lake Ohio 44012 Audited by ABS QE Customer service, Marketing, Human resources, Logistics, Supplier management, Continuous improvement, Info.

More information can be found at avient.com. Ensuring regulatory compliance for products such as food contact, toys or medical applications can be a complex and time consuming process. With a passion for innovation and more than 40 years’ experience, this advanced thinking in specialist polymer additives and liquid colorants is now helping our expanding network of customers around the globe to prosper and grow.

More information can be found at avient.com. Ensuring regulatory compliance for products such as food contact, toys or medical applications can be a complex and time consuming process. With a passion for innovation and more than 40 years’ experience, this advanced thinking in specialist polymer additives and liquid colorants is now helping our expanding network of customers around the globe to prosper and grow.

PolyOne Corporation Investor Day 2012 PolyOne Investor Presentation 5th Annual Wells Fargo Industrial and Construction Conference May 8, 2014 • In this presentation, statements that are not reported financial results or other historical information are “forward-looking statements” within the meaning of the Private Securities Litigation Reform Act of 1995. In addition, operating income before special items and adjusted EPS are components of various PolyOne annual and long-term employee incentive plans ���PolyOne Investor Presentation�5th Annual Wells Fargo�Industrial and Construction Conference �May 8, 2014 �� Forward – Looking Statements Use of Non-GAAP Measures PolyOne Commodity to Specialty Transformation Confirmation of Our Strategy Strategy and Execution Drive Results PolyOne�At A Glance Mix Shift Highlights Specialty Transformation Proof of Performance & 2015 Goals Bridge to $2.50 Adjusted EPS by 2015 Innovation Drives Earnings Growth Unique and Innovative Solutions Debt Maturities & Pension Funding – 3/31/14 Free Cash Flow and Strong Balance Sheet �Fund Investment / Shareholder Return Why Invest In PolyOne?

During this two-week effort more than 3,600 Avient associates across 100+ sites contributed 8,200 volunteer hours and raised $1.7M for more than 70 community service organizations. The term of a stock option may not extend more than 10 years from the date of grant. j) No Option Right will be exercisable more than 10 years from the Date of Grant.

In this rapidly evolving industry, the need for faster and more reliable technology is stronger than ever. Avient’s portfolio enables 5G technology from a range of fiber optic cable components to antennae and base station materials, as well as 5G-enabled devices. The need for better, faster and more reliable technology is stronger than ever and 5G is designed to provide high speed connectivity.

Idea Chemically Resistant Polymers for Next-Generation Devices Read Here you can learn more about state-of-the-art equipment and software available to support you in selecting a material. More

OUR COMPANY CULTURE Avient Corporation was originally established as PolyOne Corporation in 2000. For 2023, the stock ownership requirement was equivalent to more than four times the annual salary of our CEO and more than four times the annual cash retainer for all other Directors, based on the Company's closing stock price on December 29, 2023 of $41.57. Generally, the Secretary must receive the notice at our principal executive offices not less than 90 nor more than 120 calendar days prior to the first anniversary of the date on which we first mailed our proxy materials for the preceding year’s annual meeting.

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PolyOne Corporation Investor Day 2012 PolyOne Investor Presentation Sidoti & Company Eighteenth Annual Emerging Growth Institutional Investor Forum March 18, 2014 • In this presentation, statements that are not reported financial results or other historical information are “forward-looking statements” within the meaning of the Private Securities Litigation Reform Act of 1995. In addition, operating income before special items and adjusted EPS are components of various PolyOne annual and long-term employee incentive plans PolyOne Investor Presentation��Sidoti & Company �Eighteenth Annual Emerging Growth �Institutional Investor Forum�March 18, 2014� Forward – Looking Statements Use of Non-GAAP Measures PolyOne Commodity to Specialty Transformation Strategy and Execution Drive Results PolyOne�At A Glance Mix Shift Highlights Specialty Transformation Proof of Performance & 2015 Goals Bridge To $2.50 Adjusted EPS By 2015 Innovation Drives Earnings Growth Unique and Innovative Solutions that Help Customers Win Debt Maturities & Pension Funding – 12/31/13 Free Cash Flow and Strong Balance Sheet Fund Investment Why Invest In PolyOne?