Avient developed a Color Simulation Tool to calculate the final color of a PCR-based end article and that can be used to: 1. Plastics Recyclers Europe (PRE) Plastics Recyclers Europe (PRE) is an organization representing the voice of the European plastics recyclers who reprocess plastic waste into high-quality material destined for the production of new articles.

In connection with the completion of the Clariant Color Acquisition and effective as of June 30, 2020, the Company amended its existing Articles of Incorporation to change its name to Avient Corporation. In connection with the completion of the Clariant Color Acquisition and effective as of June 30, 2020, the Company amended its existing Articles of Incorporation to change its name to Avient Corporation. Exhibit Description 2.1† Share Purchase Agreement, dated December 19, 2019, by and between PolyOne Corporation and Clariant AG (incorporated by reference to Exhibit 2.3 to the Company's Annual Report on Form 10-K for the fiscal year ended December 31, 2019, SEC File No. 1-16091). 3.1 Amended and Restated Articles of Incorporation of Avient Corporation (as amended through June 30, 2020) (incorporated by reference to Exhibit 3.1 to the Company’s Annual Report on Form 10-K for the fiscal year ended December 31, 2020, SEC File No. 1-16091) 3.2 Amended and Restated Code of Regulations, effective June 30, 2020 (incorporated by reference to Exhibit 3.2 to the Company’s Annual Report on Form 10-K for the fiscal year ended December 31, 2020, SEC File No. 1-16091) 4.1 Indenture, dated February 28, 2013, between PolyOne Corporation and Wells Fargo Bank, National Association, as trustee (incorporated by reference to Exhibit 4.1 to the Company’s Current Report on Form 8-K filed on March 5, 2013, SEC File No. 1-16091) 4.2 Indenture, dated May 13, 2020, between PolyOne Corporation and U.S.

incorporated by reference to Exhibit 2.1 to the Company’s Current Report on Form 8-K filed March 27, 2013, SEC File No. 1-16091) 3.1 Articles of Incorporation (incorporated by reference to Exhibit 3(i) to the Company’s Annual Report on Form 10-K for the fiscal year ended December 31, 2000, SEC File No. 1-16091) 3.2 Amendment to the Second Article of the Articles of Incorporation, as filed with the Ohio Secretary of State, November 25, 2003 (incorporated by reference to Exhibit 3.1a to the Company’s Annual Report on Form 10-K for the fiscal year ended December 31, 2003, SEC File No. 1-16091) 3.3 Regulations (incorporated by reference to Exhibit 3.1 to the Company’s Current Report on Form 8-K filed on July 17, 2009, SEC File No. 1-16091) 4.1 Indenture, dated as of December 1, 1995, between the Company and NBD Bank, as trustee (incorporated by reference to Exhibit 4.3 to The Geon Company’s Annual Report on Form 10-K for the fiscal year ended December 31, 1996, SEC File No. 1-11804) 4.2 Indenture, dated as of September 24, 2010, between the Company and Wells Fargo Bank, N.A., as Trustee (incorporated by reference to Exhibit 4.1 to the Company’s Quarterly Report on Form 10-Q for the quarter ended September 30, 2010, SEC File No. 1-16091) 4.3 First Supplemental Indenture, dated as of September 24, 2010, between the Company and Wells Fargo Bank, N.A., as Trustee (incorporated by reference to Exhibit 4.2 to the Company’s Quarterly Report Form 10-Q for the quarter ended September 30, 2010, SEC File No. 1-16091) 4.4 Indenture, dated February 28, 2013, between PolyOne Corporation and Wells Fargo Bank, National Association, as trustee (incorporated by reference to Exhibit 4.1 to the Company’s Current Report on Form 8-K filed on March 5, 2013, SEC File No. 1-16091) 10.1 Amended and Restated Credit Agreement, dated March 1, 2013, among the Company, PolyOne Canada and certain other subsidiaries of the Company, Wells Fargo Capital Finance, LLC, as administrative agent, Bank of America, N.A. and U.S.

incorporated by reference to Exhibit 2.1 to the Company’s Current Report on Form 8-K filed March 27, 2013, SEC File No. 1-16091) 3.1 Articles of Incorporation (incorporated by reference to Exhibit 3(i) to the Company’s Annual Report on Form 10-K for the fiscal year ended December 31, 2000, SEC File No. 1-16091) 3.2 Amendment to the Second Article of the Articles of Incorporation, as filed with the Ohio Secretary of State, November 25, 2003 (incorporated by reference to Exhibit 3.1a to the Company’s Annual Report on Form 10-K for the fiscal year ended December 31, 2003, SEC File No. 1-16091) 3.3 Regulations (incorporated by reference to Exhibit 3.1 to the Company’s Current Report on Form 8-K filed on July 17, 2009, SEC File No. 1-16091) 4.1 Indenture, dated as of December 1, 1995, between the Company and NBD Bank, as trustee (incorporated by reference to Exhibit 4.3 to The Geon Company’s Annual Report on Form 10-K for the fiscal year ended December 31, 1996, SEC File No. 1-11804) 4.2 Indenture, dated as of September 24, 2010, between the Company and Wells Fargo Bank, N.A., as Trustee (incorporated by reference to Exhibit 4.1 to the Company’s Quarterly Report on Form 10-Q for the quarter ended September 30, 2010, SEC File No. 1-16091) 4.3 First Supplemental Indenture, dated as of September 24, 2010, between the Company and Wells Fargo Bank, N.A., as Trustee (incorporated by reference to Exhibit 4.2 to the Company’s Quarterly Report Form 10-Q for the quarter ended September 30, 2010, SEC File No. 1-16091) 4.4 Indenture, dated February 28, 2013, between PolyOne Corporation and Wells Fargo Bank, National Association, as trustee (incorporated by reference to Exhibit 4.1 to the Company’s Current Report on Form 8-K filed on March 5, 2013, SEC File No. 1-16091) 10.1 Amended and Restated Credit Agreement, dated March 1, 2013, among the Company, PolyOne Canada and certain other subsidiaries of the Company, Wells Fargo Capital Finance, LLC, as administrative agent, Bank of America, N.A. and U.S.

incorporated by reference to Exhibit 2.1 to the Company’s Current Report on Form 8-K filed March 27, 2013, SEC File No. 1-16091) 3.1 Articles of Incorporation (incorporated by reference to Exhibit 3(i) to the Company’s Annual Report on Form 10-K for the fiscal year ended December 31, 2000, SEC File No. 1-16091) 3.2 Amendment to the Second Article of the Articles of Incorporation, as filed with the Ohio Secretary of State, November 25, 2003 (incorporated by reference to Exhibit 3.1a to the Company’s Annual Report on Form 10-K for the fiscal year ended December 31, 2003, SEC File No. 1-16091) 3.3 Regulations (incorporated by reference to Exhibit 3.1 to the Company’s Current Report on Form 8-K filed on July 17, 2009, SEC File No. 1-16091) 4.1 Indenture, dated February 28, 2013, between PolyOne Corporation and Wells Fargo Bank, National Association, as trustee (incorporated by reference to Exhibit 4.1 to the Company’s Current Report on Form 8-K filed on March 5, 2013, SEC File No. 1-16091) 10.1 Amended and Restated Credit Agreement, dated March 1, 2013, among the Company, PolyOne Canada and certain other subsidiaries of the Company, Wells Fargo Capital Finance, LLC, as administrative agent, Bank of America, N.A. and U.S.

incorporated by reference to Exhibit 2.1 to the Company’s Current Report on Form 8-K filed March 27, 2013, SEC File No. 1-16091) 2.2† Equity Purchase Agreement dated June 29, 2017, by and among PolyOne Corporation, PolyOne Designed Structures and Solutions LLC and NLIN Plastics, LLC (incorporated by reference to Exhibit 2.1 to the Company's Quarterly Report on Form 10-Q for the quarter ended June 30, 2017, SEC File No. 1-16091) 3.1 Articles of Incorporation (incorporated by reference to Exhibit 3(i) to the Company’s Annual Report on Form 10-K for the fiscal year ended December 31, 2000, SEC File No. 1-16091) 3.2 Amendment to the Second Article of the Articles of Incorporation, as filed with the Ohio Secretary of State, November 25, 2003 (incorporated by reference to Exhibit 3.1a to the Company’s Annual Report on Form 10-K for the fiscal year ended December 31, 2003, SEC File No. 1-16091) 3.3 Regulations (incorporated by reference to Exhibit 3.1 to the Company’s Current Report on Form 8-K filed on July 17, 2009, SEC File No. 1-16091) 4.1 Indenture, dated February 28, 2013, between PolyOne Corporation and Wells Fargo Bank, National Association, as trustee (incorporated by reference to Exhibit 4.1 to the Company’s Current Report on Form 8-K filed on March 5, 2013, SEC File No. 1-16091) 10.1 Second Amended and Restated Credit Agreement, dated February 24, 2017, by and among PolyOne Corporation, the subsidiaries of PolyOne Corporation party thereto, Wells Fargo Capital Finance, LLC, as administrative agent, and the various lenders and other agents party thereto (incorporated by reference to Exhibit 10.2 to the Company’s Quarterly Report on Form 10-Q for the quarter ended March 31, 2017, SEC File No. 1-16091) 10.2 Credit Agreement, dated November 12, 2015, by and among PolyOne Corporation, as borrower, Citibank, N.A., as administrative agent, each of Citigroup Global Markets Inc., Wells Fargo Securities LLC, Goldman, Sachs & Co., HSBC Securities (USA) Inc. and Morgan Stanley & Co.

Effective June 30, 2020, the Company amended its existing Articles of Incorporation to change its name to Avient Corporation and changed its ticker symbol from “POL” to “AVNT”, effective at the start of trading on July 13, 2020. Exhibit Description 2.1† Share Purchase Agreement, dated December 19, 2019, by and between PolyOne Corporation and Clariant AG (incorporated by reference to Exhibit 2.3 to the Company's Annual Report on Form 10-K for the fiscal year ended December 31, 2019, SEC File No. 1-16091). 2.2† Signing Protocol between Avient Corporation and Koninklijke DSM N.V., dated April 19, 2022 (including the final form of Sale and Purchase Agreement between Avient Corporation and Koninklijke DSM N.V. as Annex A) (incorporated by reference to Exhibit 2.1 to the Company's Quarterly Report on Form 10-Q for the quarterly period ended March 31, 2022, SEC File No. 1-16091) 2.3† Sale and Purchase Agreement of the DSM Protective Materials Business, by and among Koninklijke DSM N.V., Avient Corporation and, solely for the purposes of Clause 2.1 and Clause 2.2, Fiber-Line International B.V., dated June 23, 2022 (incorporated by reference to Exhibit 2.1 to the Company's Current Report on Form 8-K filed on June 24, 2022, SEC File No. 1-16091) 2.4† Asset Purchase Agreement, dated August 11, 2022, by and between Avient Corporation and Hilo Group Buyer, LLC (incorporated by reference to Exhibit 2.1 to the Company’s Quarterly Report on Form 10-Q for the quarter ended September 30, 2022) 3.1 Amended and Restated Articles of Incorporation of Avient Corporation (as amended through June 30, 2020) (incorporated by reference to Exhibit 3.1 to the Company’s Annual Report on Form 10-K for the fiscal year ended December 31, 2020, SEC File No. 1-16091) 3.2 Avient Corporation Regulations (amended and restated, effective May 11, 2023) (incorporated by reference to Exhibit 3.1 to the Company’s Current Report on Form 8-K filed on May 16, 2023, SEC File No. 1-16091) 4.1 Indenture, dated May 13, 2020, between PolyOne Corporation and U.S.

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