Our non-GAAP adjusted financial measures for cost of sales, gross margin and operating income exclude the impact of special (gains) and charges and our non-GAAP adjusted financial measures for tax rate, net income attributable to Ecolab and diluted earnings per share further exclude the impact of discrete tax items. We include items within special (gains) and charges and discrete tax items that we believe can significantly affect the period-over-period assessment of operating results and not necessarily reflect costs and/or income associated with historical trends and future results. After tax special (gains) and charges are derived by applying the applicable local jurisdictional tax rate to the corresponding pre-tax special (gains) and charges.
EBITDA is defined as the sum of net income including noncontrolling interest, provision for income taxes, net interest expense, depreciation and amortization. EBITDA is used in our net debt to EBITDA ratio, which we view as important indicators of the operational and financial health of our organization.
We evaluate the performance of our international operations based on fixed currency rates of foreign exchange. Fixed currency amounts included in this Form 10-Q are based on translation into U.S. dollars at the fixed foreign currency exchange rates established by management at the beginning of 2024. We also provide our segment results based on public currency rates for informational purposes.
Our reportable segments do not include the impact of intangible asset amortization from the Nalco and Purolite transactions or the impact of special (gains) and charges as these are not allocated to our reportable segments.
Our non-GAAP financial measures for organic sales, organic operating income and organic operating income margin are at fixed currency and exclude the impact of special (gains) and charges, the results of our acquired businesses from the first twelve months post acquisition and the results of divested businesses from the twelve months prior to divestiture. As part of the separation of ChampionX in 2020, we entered into an agreement with ChampionX to provide, receive or transfer certain products for a transitionary period. Transitionary period sales of product to ChampionX under this agreement are recorded in product and equipment sales in the Corporate segment along with the related cost of sales. The remaining sales to ChampionX are recorded in product and equipment sales in Global Industrial segment along with the related cost of sales. These transactions are removed from the consolidated results as part of the calculation of the impact of acquisitions and divestitures.
These non-GAAP measures are not in accordance with, or an alternative to U.S. GAAP, and may be different from non-GAAP measures used by other companies. Investors should not rely on any single financial measure when evaluating our business. We recommend that investors view these measures in conjunction with the U.S. GAAP measures included in this MD&A and we have provided reconciliations of reported U.S. GAAP amounts to the non-GAAP amounts.
FORWARD-LOOKING STATEMENTS
This Quarterly Report on Form 10-Q, including “Management’s Discussion and Analysis of Financial Condition and Results of Operations” in Item 2, contains forward-looking statements within the meaning of the Private Securities Litigation Reform Act of 1995. These statements include our business performance and prospects; expectations concerning timing, amount and type of restructuring costs and savings from restructuring activities; Russian operations; working capital; capital investments, acquisitions and share repurchases; amortization expense; non-performance of financial counterparties; payments and contributions to pension and postretirement health care benefit plans; the impact of lawsuits, claims and environmental matters; impact of new accounting pronouncements and tax laws; cash flows, borrowing capacity and funding of cash requirements, including repayment of debt; payments related to uncertain tax positions; and implementation of ERP system upgrade.
Without limiting the foregoing, words or phrases such as “will likely result,” “are expected to,” “will continue,” “is anticipated,” “we believe,” “we expect,” “estimate,” “project” (including the negative or variations thereof) or similar terminology, generally identify forward-looking statements. Forward-looking statements may also represent challenging goals for us. These statements, which represent our expectations or beliefs concerning various future events, are based on current expectations that involve a number of risks and uncertainties that could cause actual results to differ materially from those of such forward-looking statements. In particular, the ultimate results of any restructuring or efficiency initiative, integration and business improvement actions, including cost synergies, depend on a number of factors, including the development of final plans, the impact of local regulatory requirements regarding employee terminations, the time necessary to develop and implement the restructuring or efficiency initiative and other business improvement initiatives and the level of success achieved through such actions in improving competitiveness, efficiency and effectiveness. We caution that undue reliance should not be placed on such forward-looking statements, which speak only as of the date made.
Some of the factors which could cause results to differ materially from those expressed in any forward-looking statements are set forth under Item 1A of our most recent Form 10-K and our other public filings with the Securities and Exchange Commission (the "SEC"), and include the impact of economic factors such as the worldwide economy, interest rates, foreign currency risk, reduced sales and earnings in our international operations resulting from the weakening of local currencies versus the U.S. dollar, demand uncertainty, supply chain challenges and inflation; the vitality of the markets we serve; exposure to global economic, political and legal risks related to our international operations, including geopolitical instability and the escalation of armed conflicts; our ability to successfully execute organizational change and management transitions; information technology infrastructure failures or breaches in data security; difficulty in procuring raw materials or fluctuations in raw material costs; the occurrence of severe public health outbreaks not limited to COVID-19; our ability to acquire complementary businesses and to effectively integrate such businesses; our ability to execute key business initiatives; our ability to successfully compete with respect to value, innovation and customer support; pressure on operations from consolidation of customers or vendors; restraints on pricing flexibility due to contractual obligations and our ability to meet our contractual commitments; the costs and effects of complying with laws and regulations, including those relating to the environment, climate change