Zegna Results Presentation Deck

Non-IFRS Financial Measures Ermenegildo Zegna Group Adjusted Basic Earnings per Share and Adjusted Diluted Earnings per Share Adjusted Basic Earnings per Share and Adjusted Diluted Earnings per Share are defined as basic earnings per share and diluted earnings per share adjusted for income and costs (net of related tax effects) which are significant in nature and that management considers not reflective of underlying activities, including, for one or all of the periods presented and as further described below, legal costs for trademark disputes, transaction costs related to acquisitions, severance indemnities and provisions for severance expenses, costs related to the Business Combination, net impairments of leased and owned stores, a special donation to the UNHCR, net (income)/costs related to lease agreements, gains on the Thom Browne option realized in connection with the exercise of the option and certain other items, as well as the tax effects of the adjusting items (calculated based on the applicable tax rates of the jurisdictions to which the adjustments relate) and excluding the impact of non-controlling interests on the adjusting items. Zegna's management uses Adjusted Basic Earnings per Share and Adjusted Diluted Earnings per Share to understand and evaluate Zegna's underlying performance. Zegna's management believes this non-IFRS financial measure is useful because it excludes items that it does not believe are indicative of its underlying performance and allows it to view operating trends, perform analytical comparisons and benchmark performance between periods. Accordingly, management believes that Adjusted Basic and Diluted Earnings per Share provides useful information to third party stakeholders in understanding and evaluating Zegna's operating results. April 6, 2023 23

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