Director since: 2011 Age: 68 Current Public Company Directorships: • None Current Non-Public Company Directorships: • X-Energy Reactor Company, LLC • Engine No. 1 Former Directorships: • Enbridge Inc

EXHIBIT AND FINANCIAL STATEMENT SCHEDULES (a)(1) Financial Statements: The following consolidated financial statements of Avient Corporation are included in Item 8: Consolidated Statements of Income for the years ended December 31, 2023, 2022 and 2021 Consolidated Statements of Comprehensive Income for the years ended December 31, 2023, 2022 and 2021 Consolidated Balance Sheets at December 31, 2023 and 2022 Consolidated Statements of Cash Flows for the years ended December 31, 2023, 2022 and 2021 Consolidated Statements of Shareholders’ Equity for the years ended December 31, 2023, 2022 and 2021 Notes to Consolidated Financial Statements All other schedules for which provision is made in Regulation S-X of the SEC are not required under the related instructions or are inapplicable and, therefore, have been omitted.

Director since: 2011 Age: 67 Current Public Company Directorships: • Exxon Mobil Corporation Current Non-Public Company Directorships: • X-Energy Reactor Company, LLC Former Directorships: • Enbridge Inc. • Marathon • MPLX GP, TLGP • Andeavor • DCP Midstream GP, LLC • QEP Midstream Partners, LP • Western Logistics GP LLC Neil Green Executive Vice President and Chief Digital Officer at Otis Worldwide Corporation (“Otis”), a leading elevator and escalator manufacturing, installation and service company, since 2020.

Revised 29-Apr-2021 HOME | Contents | Message from the CEO | Who We Are | People | Products | Planet | Performance | Metrics | Index Sustainability Report | 2020 85 https://www.avient.com/sites/default/files/2021-03/2020-climate-change-avient-score-card.pdf I N D E X HOME | Contents | Message from the CEO | Who We Are | People | Products | Planet | Performance | Metrics | Index Sustainability Report | 2020 86 GRI Standard Disclosure Title Avient Disclosures General Disclosures Organizational Profile 102–1 Name of the organization About Us—Who We Are 102–2 Activities, brands, products, and ser vices Products—All Sections Avient products are not banned in any market. 102–3 Location of headquarters About Us—Historic Transformation, Inspired Future About Us—Where We Are: Global Locations Avient 2020 Annual Report—Form 10-K Cover Page 102–4 Location of operations About Us—Where We Are: Global Locations Avient 2020 Annual Report—Form 10-K Page 14 102–5 Ownership and legal form Avient 2020 Annual Report—Form 10-K Cover Page 102–6 Markets ser ved About Us—Communities Counting on Avient 102–7 Scale of the organization Performance—Performance Overview Avient 2020 Annual Report—Form 10-K Pages 2–10 102–8 Information on employees and other workers People—All Sections Avient 2020 Annual Report—Form 10-K Pages 4–5 Currently we report on the number of associates.

EXHIBITS AND FINANACIAL STATEMENT SCHEDULES (a)(1) Financial Statements: The following consolidated financial statements of PolyOne Corporation are included in Item 8: Consolidated Statements of Income (Loss) for the years ended December 31, 2017, 2016 and 2015 Consolidated Statements of Comprehensive Income (Loss) for the years ended December 31, 2017, 2016 and 2015 Consolidated Balance Sheets at December 31, 2017 and 2016 Consolidated Statements of Cash Flows for the years ended December 31, 2017, 2016 and 2015 Consolidated Statements of Shareholders’ Equity for the years ended December 31, 2017, 2016 and 2015 Notes to Consolidated Financial Statements All other schedules for which provision is made in Regulation S-X of the SEC are not required under the related instructions or are inapplicable and, therefore, have been omitted.

EXHIBITS AND FINANACIAL STATEMENT SCHEDULES (a)(1) Financial Statements: The following consolidated financial statements of PolyOne Corporation are included in Item 8: Consolidated Statements of Income for the years ended December 31, 2016, 2015 and 2014 Consolidated Statements of Comprehensive Income for the years ended December 31, 2016, 2015 and 2014 Consolidated Balance Sheets at December 31, 2016 and 2015 Consolidated Statements of Cash Flows for the years ended December 31, 2016, 2015 and 2014 Consolidated Statements of Shareholders’ Equity for the years ended December 31, 2016, 2015 and 2014 Notes to Consolidated Financial Statements All other schedules for which provision is made in Regulation S-X of the SEC are not required under the related instructions or are inapplicable and, therefore, have been omitted.

x) “Performance Share” means a bookkeeping entry that records the equivalent of one Common Share awarded pursuant to Section 8 of this Plan. i) Subject to adjustment as provided in Section 12 of this Plan and the share counting rules set forth in Section 3(b) of this Plan, the number of Common Shares available under this Plan for (A) Option Rights or Appreciation Rights, (B) Restricted Stock, (C) Restricted Stock Units, (D) Performance Shares or Performance Units, (E) awards to non- employee Directors contemplated by Section 9 of this Plan, (F) awards contemplated by Section 10 of this Plan, or (G) dividend equivalents, will not exceed in the aggregate (x) 5,000,000 Common Shares (consisting of 2,500,000 Common Shares that were approved by the Company's shareholders in 2020 and 2,500,000 Common Shares to be approved by the Company's shareholders in 2023) plus (y) the Common Shares that are subject to awards granted under this Plan or the Predecessor Plans that are added (or added back, as applicable) to the aggregate number of Common Shares available under this Section 3(a)(i) pursuant to the share counting rules of this Plan.

Colorant Chromatics™ X-Ray Opaque Formulations

Director since: 2011 Age: 67 Current Public Company Directorships: • Exxon Mobil Corporation Current Non-Public Company Directorships: • X-Energy Reactor Company, LLC Former Directorships: • Enbridge Inc. • Marathon • MPLX GP, TLGP • Andeavor • DCP Midstream GP, LLC • QEP Midstream Partners, LP • Western Logistics GP LLC Neil Green Executive Vice President and Chief Digital Officer at Otis Worldwide Corporation (“Otis”), a leading elevator and escalator manufacturing, installation and service company, since 2020.

EXHIBITS AND FINANACIAL STATEMENT SCHEDULES (a)(1) Financial Statements: The following consolidated financial statements of PolyOne Corporation are included in Item 8: Consolidated Statements of Income for the years ended December 31, 2013, 2012 and 2011 Consolidated Statements of Comprehensive Income for the years ended December 31, 2013, 2012 and 2011 Consolidated Balance Sheets at December 31, 2013 and 2012 Consolidated Statements of Cash Flows for the years ended December 31, 2013, 2012 and 2011 Consolidated Statements of Shareholders’ Equity for the years ended December 31, 2013, 2012 and 2011 Notes to Consolidated Financial Statements All other schedules for which provision is made in Regulation S-X of the SEC are not required under the related instructions or are inapplicable and, therefore, have been omitted.