Who We Are Personal Values INTEG IT Y R SP ECT H O N E S T Y Core Values COLLABO IO E X C LL ENCE INNOVATION Sustainability Report | 2019 7 What We Do: Material Science Avient’s vision is to create specialized and sustainable material solutions that transform customer challenges into opportunities, bringing new products to life for a better world.

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

Who We Are Personal Values INTEG IT Y R SP ECT H O N E S T Y Core Values COLLABO IO E X C LL ENCE INNOVATION Sustainability Report | 2019 7 What We Do: Material Science Avient’s vision is to create specialized and sustainable material solutions that transform customer challenges into opportunities, bringing new products to life for a better world.

Personal Values INTEG IT Y R SP ECT H O N E S T Y Core Values COLLABO E X EL LE NCE INNOVATION OUR CULTURE 1 Annual Report | 2021 2 0 2 1 Dear Avient Shareholders, 2021 was our first full year as Avient Corporation. 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, 2021, 2020 and 2019 Consolidated Statements of Comprehensive Income for the years ended December 31, 2021, 2020 and 2019 Consolidated Balance Sheets at December 31, 2021 and 2020 Consolidated Statements of Cash Flows for the years ended December 31, 2021, 2020 and 2019 Consolidated Statements of Shareholders’ Equity for the years ended December 31, 2021, 2020 and 2019 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.

Personal Values INTEG IT Y R SP ECT H O N E S T Y Core Values COLLABO E X EL LE NCE INNOVATION OUR CULTURE 1 Annual Report | 2022 Dear Avient Shareholders, 2022 was a challenging year but also one filled with significant accomplishments that we look back on with a great sense of pride. 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, 2022, 2021 and 2020 Consolidated Statements of Comprehensive Income for the years ended December 31, 2022, 2021 and 2020 Consolidated Balance Sheets at December 31, 2022 and 2021 Consolidated Statements of Cash Flows for the years ended December 31, 2022, 2021 and 2020 Consolidated Statements of Shareholders’ Equity for the years ended December 31, 2022, 2021 and 2020 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.

B-4 (x) “Perforff mance 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 forff th 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 Perforff mance 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 paid with respect to awardsmade under this Plan, will not exceed in the aggregate (x) 2,500,000 Common Shares minus (y) as of the Effeff ctive Date, one Common Share for every one Common Share subject to an award granted under the Predecessor Plan between March 1, 2017 and the Effeff ctive Date.

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.

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.