Page 3 • This presentation includes the use of both GAAP (generally accepted accounting principles) and non-GAAP financial measures. In certain cases throughout this presentation, we have presented GAAP and non-GAAP financial measures Use of Non GAAP Measures presentation, we have presented GAAP and non-GAAP financial measures adjusted to reflect full-year 2011 Pro forma results, including ColorMatrix A reconciliation of each 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.

Discuss with management and the independent auditor the financial information to be included in the Company’s Annual Report on Form 10-K, including the annual audited financial statements and the Company’s disclosures in “Management’s Discussion and Analysis of Financial Condition and Results of Operations”. 2. Discuss with management and the independent auditor the financial information to be included in the Company’s Quarterly Reports on Form 10-Q, including the quarterly financial statements and the Company’s disclosures in “Management’s Discussion and Analysis of Financial Condition and Results of Operations”. 3. Discuss the Company’s quarterly earnings press releases, including with respect to the use of any “pro forma” or “adjusted” financial information not presented in accordance with generally accepted accounting principles, as well as financial information and earnings guidance, if any, provided to investors, analysts, rating agencies or financial institutions. 5.

Beggs 47 Senior Vice President and Chief Financial Officer Kristen A. Definition and Limitations of Internal Control Over Financial Reporting A company’s internal control over financial reporting is a process designed to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles. BEGGS Senior Vice President and Chief Financial Officer (Principal Financial and Accounting Officer) February 20, 2024 Jamie A.

PATTERSON Executive Vice President and Chief Financial Officer (Principal Financial and Accounting Officer) Date: February 17, 2012 Robert M. FINANCIAL INFORMATION Security analysts and representatives of financial institutions are invited to contact: Cynthia D. Senior Vice President, Chief Financial Officer MICHAEL E.

The non-GAAP financial measures include: adjusted EPS and free cash flow. Below is a reconciliation of these non-GAAP financial measures to their most directly comparable financial measures calculated and presented in accordance with GAAP. Below is a reconciliation of these non-GAAP financial measures to their most directly comparable financial measures calculated and presented in accordance with GAAP.

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. Non-GAAP financial measures have limitations as analytical tools and should not be considered in isolation from, or solely as alternatives to, financial measures prepared in accordance with GAAP. The presentation of these measures may be different from non-GAAP financial measures used by other companies.

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. Non-GAAP financial measures have limitations as analytical tools and should not be considered in isolation from, or solely as alternatives to, financial measures prepared in accordance with GAAP. The presentation of these measures may be different from non-GAAP financial measures used by other companies.

Beggs 46 Senior Vice President, Chief Financial Officer Kristen A. BEGGS Senior Vice President and Chief Financial Officer (Principal Financial and Accounting Officer) February 22, 2023 Jamie A. EXHIBIT AND FINANCIAL STATEMENT SCHEDULES ITEM 16.

Non-GAAP financial measures have limitations as analytical tools and should not be considered in isolation from, or solely as alternatives to, financial measures prepared in accordance with GAAP. Below is a reconciliation of these non-GAAP financial measures to their most directly comparable financial measures calculated and presented in accordance with GAAP. Below is a reconciliation of this non-GAAP financial measure to the most directly comparable financial measure calculated and presented in accordance with GAAP.

BEGGS Senior Vice President and Chief Financial Officer Jamie A. Beggs is Senior Vice President and Chief Financial Officer at Avient Corporation, an innovator of materials solutions that help customers succeed while enabling a sustainable world. She previously served as Chief Financial Officer of Hunt Consolidated, Inc., a diversified holding company whose businesses served many industries including energy, real estate and private investments.