Investor Presentaiton

Disclaimer; non-GAAP financial measures We may from time to time be in possession of certain information regarding WestRock that applicable law would not require us to disclose to the public in the ordinary course of business, but would require us to disclose if we were engaged in the purchase or sale of our securities. This presentation shall not be considered to be part of any solicitation of an offer to buy or sell WestRock securities. This presentation also may not include all of the information regarding WestRock that you may need to make an investment decision regarding WestRock securities. Any investment decision should be made on the basis of the total mix of information regarding WestRock that is publicly available as of the date of the decision. We report our financial results in accordance with accounting principles generally accepted in the United States ("GAAP"). However, management believes certain non-GAAP financial measures provide users with additional meaningful financial information that should be considered when assessing our ongoing performance. Management also uses these non-GAAP financial measures in making financial, operating and planning decisions and in evaluating our performance. Non-GAAP financial measures should be viewed in addition to, and not as an alternative for, our GAAP results. The non-GAAP financial measures we present may differ from similarly captioned measures presented by other companies. See the Appendix for details about these non-GAAP financial measures, as well as the required reconciliations. 3 WestRock

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