The non-GAAP financial measures include: adjusted EPS, adjusted operating income, free cash flow and adjusted EBITDA. A reconciliation of each historical non-GAAP financial measure with the most directly comparable GAAP financial measure is attached to this presentation which is posted on our website at www.avient.com. To provide comparable financial results, the Company references “pro forma” financial metrics, which include the business results of Clariant Color for periods prior to the Acquisition Date.

Use of Non-GAAP Measures This presentation includes the use of both GAAP (generally accepted accounting principles) and non-GAAP financial measures. The non-GAAP financial measures include: adjusted EPS, adjusted operating income, free cash flow and adjusted EBITDA. Avient’s chief operating decision maker uses these financial measures to monitor and evaluate the ongoing performance of the Company and each business segment and to allocate resources.

Beggs Senior Vice President, Chief Financial Officer Michael A. Beggs Senior Vice President, Chief Financial Officer Michael A. Below is a reconciliation of these non-GAAP financial measures to their most directly comparable financial measures calculated and presented in accordance with GAAP.

See Appendix A for an explanation of management’s use of non-GAAP financial measures and a reconciliation of non-GAAP financial measures to our results as reported under GAAP. Management has the primary responsibility for the completeness and accuracy of the Company’s consolidated financial statements and disclosures, the financial reporting process and the effectiveness of the Company’s internal control over financial reporting. Richardson Executive Vice President, Chief Financial Officer Mark D.

Beggs Senior Vice President, Chief Financial Officer Michael A. Management has the primary responsibility for the completeness and accuracy of the Company’s consolidated financial statements and disclosures, the financial reporting process and the effectiveness of the Company’s internal control over financial reporting. Beggs Senior Vice President, Chief Financial Officer Michael A.

ARTICLES OF ASSOCIATION Date of the latest change: 2020-11-02 FINANCIAL YEAR Registered financial year: 0101 - 1231 Latest annual report submitted covers financial period 20190101-20191231 DATE OF REGISTRATION OF CURRENT AND PREVIOUS BUSINESS NAMES 2020-11-30 Avient Colorants Sweden AB 2016-01-19 Clariant Plastics & Coatings (Nordic) AB 2000-08-23 Clariant Masterbatches Norden Aktiebolag 1990-05-22 Drycolor Aktiebolag 1990-04-10 Nya Drycolor Aktiebolag **** The above information is an extract from the Trade and Industry Register Bolagsverket, the Swedish Companies Registration Office **** Bolagsverket 851 81 Sundsvall 0771-670 670 bolagsverket@bolagsverket.se www.bolagsverket.se 2020-11-30T14:53:51+0100 Sweden Bolagsverket Bolagsverket intygar äktheten och integriteten för detta dokument

Sweden Filial Address: Drottninggatan 56 411 07 GÖTEBORG County and municipality: Västra Götaland, Göteborg Note: MANAGING DIRECTOR 630516 Palm, Christoph, Gruss Strooss 35, L-9991 WEISWAMPACH, LUXEMBURG AUDITORS 556053-5873 Ernst & Young Aktiebolag, Box 7850, 103 99 STOCKHOLM Represented by: 850807-5135 PRINCIPALLY RESPONSIBLE AUDITOR 850807-5135 Edman, Mikael Thomas Gunnar, c/o Ernst & Young AB, 401 82 GÖTEBORG SIGNATORY POWER Signatory power alone by Palm, Christoph FINANCIAL YEAR Registered financial year: 0101 - 1231 DATE OF REGISTRATION OF CURRENT AND PREVIOUS BUSINESS NAMES 2021-11-29 Avient S.à r.l., Sweden Filial 2018-08-28 PolyOne S.à.r.l., Sweden Filial INFORMATION ABOUT THE FOREIGN COMPANY B226205 Avient S.á.r.l. 19, Route de Bastogne L-9638 Pommerloch LUXEMBURG Registered office of the foreign company: Pommerloch Name of the register in which the foreign company is registered: 3 (3) RCS, Registre de Commerce, Luxembourg Business Register LUXEMBURG Foreign company's financial year: 0101 - 1231 The above information is an extract from the Trade and Industry Register Bolagsverket, the Swedish Companies Registration Office.

USE OF NON-GAAP MEASURES PolyOne Corporation 3 This presentation includes the use of both GAAP (generally accepted accounting principles) and non-GAAP financial measures. The non-GAAP financial measures include: adjusted EPS, pro forma adjusted EPS, adjusted operating income, adjusted EBITDA, return on invested capital (ROIC) and free cash flow. A reconciliation of each historical non-GAAP financial measure with the most directly comparable GAAP financial measure is attached to this presentation, which is posted on our website at www.polyone.com.

Functional Department Name Recast Financial Information for Discontinued Operations June 29, 2017 POLYONE CORPORATION 2 Slide 3 - GAAP Financial Information Recast for DSS Divestiture Reflects recast GAAP financial information for DSS as a discontinued operation. Slide 4 - Adjusted Financial Information Recast for DSS Divestiture Reflects quarterly adjusted condensed financial data recast for DSS as a discontinued operation. Slide 6 - Non-GAAP Reconciliations Reflects a reconciliation of each non-GAAP financial measure with the most directly comparable GAAP financial measure for these recast historical financial results.

Performance: Review financial performance and growth. This process focuses on financial, operational, and reputational risks. Yes, a single figure estimate Potential financial impact figure (currency) 19,000,000 Potential financial impact figure – minimum (currency) Potential financial impact figure – maximum (currency) Explanation of financial impact figure Avient’s 2020 revenue was $3.8 billion - if our revenue figures were impacted by .5%, this could result in a $19 million impact. $3.8b*0.5%=$19,000,000.