executive vice president and chief financial officer; and other senior executives.

In addition, the company will provide an update on the integration of the Clariant Color business, including future synergy capture, and a financial overview.

Financials

The non-GAAP financial measures include: Adjusted Earnings Per Share 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. 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.

Fuel economy requirements in some countries recently became much tougher, with failure to comply bringing serious financial penalties.

Microsoft PowerPoint - Recast Financial Information for Pension Standard v13 2013 to 2017 Recast GAAP Financial Information for the Adoption of ASU 2017-07: Presentation of Net Periodic Pension and Postretirement Benefit Cost April 26, 2018 POLYONE CORPORATION 2 Reflects quarterly GAAP financial adjustments for the adoption of ASU 2017-07. For comparative purposes, we have recast our historical GAAP financial information for 2013 to 2017. Description POLYONE CORPORATION 3 2013 to 2017 Recast GAAP Financial Information for the Adoption of ASU 2017-07 Q1 Q2 Q3 Q4 YTD Q1 Q2 Q3 Q4 YTD Q1 Q2 Q3 Q4 YTD Operating Income - As Previously Reported 56.3$ 73.1$ 55.5$ 58.1$ 243.0$ 56.0$ 49.3$ 57.9$ (12.6)$ 150.6$ 70.3$ 78.7$ 74.3$ 34.3$ 257.6$ Pension and Postretirement Adjustments: Interest Cost 6.1 6.1 6.1 6.2 24.5 6.4 6.4 6.4 6.4 25.6 5.5 5.5 5.5 5.4 21.9 Expected Return on Plan Assets (9.3) (9.3) (9.3) (9.5) (37.4) (8.1) (8.1) (8.0) (8.0) (32.2) (8.2) (8.2) (8.2) (8.1) (32.7) Mark to Market Adjustment - - - (44.0) (44.0) - - - 56.5 56.5 - - - 11.6 11.6 Operating Income - Recasted for ASU 2017-07 53.1$ 69.9$ 52.3$ 10.8$ 186.1$ 54.3$ 47.6$ 56.3$ 42.3$ 200.5$ 67.6$ 76.0$ 71.6$ 43.2$ 258.4$ Other Income (Expense), net - As Previously Reported 1.5$ (1.3)$ (1.5)$ -$ (1.3)$ (0.7)$ (0.4)$ (1.6)$ (1.4)$ (4.1)$ (0.6)$ (1.2)$ (1.7)$ 0.3$ (3.2)$ Pension and Postretirement Adjustments: Interest Cost (6.1) (6.1) (6.1) (6.2) (24.5) (6.4) (6.4) (6.4) (6.4) (25.6) (5.5) (5.5) (5.5) (5.4) (21.9) Expected Return on Plan Assets 9.3 9.3 9.3 9.5 37.4 8.1 8.1 8.0 8.0 32.2 8.2 8.2 8.2 8.1 32.7 Mark to Market Adjustment - - - 44.0 44.0 - - - (56.5) (56.5) - - - (11.6) (11.6) Other Income (Expense), net - Recasted for ASU 2017-07 4.7$ 1.9$ 1.7$ 47.3$ 55.6$ 1.0$ 1.3$ -$ (56.3)$ (54.0)$ 2.1$ 1.5$ 1.0$ (8.6)$ (4.0)$ Q1 Q2 Q3 Q4 YTD Q1 Q2 Q3 Q4 YTD Operating Income - As Previously Reported 70.4$ 81.8$ 72.0$ 62.1$ 286.3$ 84.0$ 80.0$ 67.7$ 45.8$ 277.5$ Pension and Postretirement Adjustments: Interest Cost 5.3 5.3 5.3 5.3 21.2 4.9 4.9 4.9 5.0 19.7 Expected Return on Plan Assets (7.9) (7.9) (7.8) (7.8) (31.4) (6.9) (6.9) (6.9) (7.0) (27.7) Mark to Market Adjustment - - - (8.4) (8.4) - - - 3.3 3.3 Operating Income - Recasted for ASU 2017-07 67.8$ 79.2$ 69.5$ 51.2$ 267.7$ 82.0$ 78.0$ 65.7$ 47.1$ 272.8$ Other Income (Expense), net - As Previously Reported -$ 0.1$ (0.1)$ 0.4$ 0.4$ (1.1)$ (1.4)$ (0.7)$ (0.9)$ (4.1)$ Pension and Postretirement Adjustments: Interest Cost (5.3) (5.3) (5.3) (5.3) (21.2) (4.9) (4.9) (4.9) (5.0) (19.7) Expected Return on Plan Assets 7.9 7.9 7.8 7.8 31.4 6.9 6.9 6.9 7.0 27.7 Mark to Market Adjustment - - - 8.4 8.4 - - - (3.3) (3.3) Other Income (Expense), net - Recasted for ASU 2017-07 2.6$ 2.7$ 2.4$ 11.3$ 19.0$ 0.9$ 0.6$ 1.3$ (2.2)$ 0.6$ 2013 2014 2015 2016 2017

Looking forward, Avient’s Sustainable Sourcing Program is developing a framework to hold our partners accountable to improve upon their sustainable supply chain, including analyzing areas of risk such as quality, environmental, social, geopolitical financial, conflict minerals, and more.

STAN-TONE HCC-29053 FINANCIAL GRAY

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.