Emergent BioSolutions Inc.

•Segment Adjusted Gross Margin %

We define Adjusted Net Income and Adjusted Net Income per Diluted Share, which are non-GAAP financial measures, as net income (loss) and net income (loss) per diluted share, respectively, excluding the impact of non-cash amortization charges, impairments, severance and restructuring costs (benefits), inventory step-up provision, acquisition and divestiture costs, loss on assets held for sale, contingent consideration milestones, changes in fair value of financial instruments, stock-based compensation expense, loss on debt extinguishment, other, net, and tax effects. In the first quarter of 2026 we revised our calculation of these measures to exclude the impact of stock-based compensation expense, as this is a non-cash expense that is not related to our operating performance. We use Adjusted Net Income for the purpose of calculating Adjusted Net Income per Diluted Share. Management uses Adjusted Net Income per Diluted Share to assess total Company operating performance on a consistent basis. We believe that these non-GAAP financial measures, when considered together with our GAAP financial results and GAAP financial measures, provide management and investors with an additional understanding of our business operating results, including underlying trends.

We define Adjusted EBITDA, which is a non-GAAP financial measure, as net income (loss) before depreciation and amortization, income taxes, total interest expense, net, impairments, inventory step-up provision, changes in fair value of financial instruments, severance and restructuring costs (benefits), acquisition and divestiture costs, loss on assets held for sale, contingent consideration milestones, stock-based compensation expense, loss on debt extinguishment, and other, net. We define Adjusted EBITDA Margin, which is a non-GAAP financial measure, as Adjusted EBITDA divided by Total Revenues. In the first quarter of 2026 we revised our calculation of these measures to exclude the impact of stock-based compensation expense, as this is a non-cash expense that is not related to our operating performance. We believe that these non-GAAP financial measures, when considered together with our GAAP financial results and GAAP financial measures, provide management and investors with a more complete understanding of our operating results, including underlying trends. In addition, EBITDA is a common alternative measure of operating performance used by many of our competitors. It is used by investors, financial analysts, rating agencies and others to value and compare the financial performance of companies in our industry, although it may be defined differently by different companies. Therefore, we also believe that this non-GAAP financial measure, considered along with corresponding GAAP financial measures, provides management and investors with additional information for comparison of our operating results with the operating results of other companies.

We define Adjusted Gross Margin, which is a non-GAAP financial measure, as Gross Margin, excluding the impact of intangible asset amortization, stock-based compensation expense, severance and restructuring costs (benefits) and inventory step-up provision. We define Adjusted Gross Margin %, which is a non-GAAP financial measure, as Adjusted Gross Margin as a percentage of Products and services sales, net. In the first quarter of 2026 we revised our calculation of these measures to exclude the impact of stock-based compensation expense, as this is a non-cash expense that is not related to our operating performance.

We define Segment Adjusted Gross Margin, which is a non-GAAP financial measure, as a segment's Gross Margin excluding the respective impact of intangible asset amortization, severance and restructuring costs (benefits), stock-based compensation expense and inventory step-up provision. We define Segment Adjusted Gross Margin %, which is a non-GAAP financial measure, as Segment Adjusted Gross Margin as a percentage of a segment's revenues. In the first quarter of 2026 we revised our calculation of these measures to exclude the impact of stock-based compensation expense, as this is a non-cash expense that is not related to segment operating performance.

Non-GAAP financial measures are not defined in the same manner by all companies and may not be comparable with other similarly titled measures of other companies. The determination of the amounts that are excluded from these non-GAAP financial measures are a matter of management judgment and depend upon, among other factors, the nature of the underlying expense or income amounts. Non-GAAP financial measures should be considered in addition to, but not as a substitute for or superior to, the information contained in our Consolidated Statements of Operations and Consolidated Statements of Cash Flows. Reconciliations of these non-GAAP financial measures to the most directly comparable GAAP financial measures are included in the financial tables accompanying this press release.