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AVIENT CORPORATION GROUP’S PUBLICATION OF UK TAX STRATEGY Introduction This document summarizes Avient Corporation and its worldwide affiliates’ (together “The Avient Group”) policy and approach to conducting United Kingdom (“UK”) tax affairs and managing tax risk. This document has been approved by Avient Corporation’s Vice President, Tax, and by each of the UK sub-groups owned by the Avient Group through such appropriate board of directors of the UK sub-groups.

Microsoft Word - Terms and Conditions Finland _8 April 2014_.doc TERMS AND CONDITIONS These Terms and Conditions apply to the sale of Products by PolyOne Corporation and its subsidiaries. 1. GENERAL These terms and conditions (the "Terms and Conditions") shall exclusively govern the sale and purchase of all products sold by PolyOne Corporation, and any of its affiliates in Europe. INTEGRATION These Terms and Conditions apply to all sales by PolyOne Corporation, and its affiliated companies.

Schematic representation of creep mechanism; chain alignment and void formation in response to applied stress. 3© 2021 Avient Corporation, 33587 Walker Road, Avon Lake, Ohio USA 44012 There are several key factors which can influence the timeline to ESC failure: 1. List of polymers tested and identifying features. 6© 2021 Avient Corporation, 33587 Walker Road, Avon Lake, Ohio USA 44012 To assess the results of the chemical resistance testing, an ESCR criteria was developed that took into consideration a visual observation as well as the mechanical data. - - 8© 2021 Avient Corporation, 33587 Walker Road, Avon Lake, Ohio USA 44012 Table 3B.

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Any change in company name effected before 13 Jan 2003 will not be listed) TAN YONG TAT ACCOUNTING AND CORPORATE REGULATORY AUTHORITY : 02/08/2021 : Dated SINGAPORE ACRA210802127158Receipt Number ASST REGISTRAR OF COMPANIES & BUSINESS NAMES Authentication No. : T21643222I

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Microsoft Word - 55324 Letter of Conformity RCMS Option 2 .docx ABS Quality Evaluations Letter Of Conformity This is to confirm that the Environment, Health, Safety and Security Management System of: PolyOne Corporation 2400 East Devon Elk Grove, IL 60007 U.S.A.