Non-GAAP Financial Measures

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From time to time, management may publicly disclose certain "non-GAAP financial measures" in the course of our financial presentations, earnings releases, earnings conference calls, and otherwise. For these purposes, the SEC defines a "non-GAAP financial measure" as a numerical measure of historical or future financial performance, financial positions, or cash flows that excludes amounts, or is subject to adjustments that effectively exclude amounts, included in the most directly comparable measure calculated and presented in accordance with GAAP in financial statements, and vice versa for measures that include amounts, or is subject to adjustments that effectively include amounts, that are excluded from the most directly comparable measure so calculated and presented. For these purposes, "GAAP" refers to generally accepted accounting principles in the United States.

Non-GAAP financial measures disclosed by management are provided as additional information to investors in order to provide them with an alternative method for assessing our financial condition and operating results. These measures are not in accordance with, or a substitute for, GAAP, and may be different from or inconsistent with non-GAAP financial measures used by other companies.

Pursuant to the requirements of Regulation G, whenever we refer to a non-GAAP financial measure, we will also generally present, on this Web site, the most directly comparable financial measure calculated and presented in accordance with GAAP, along with a reconciliation of the differences between the non-GAAP financial measure we reference with such comparable GAAP financial measure.

	Reconciliation of Net Earnings to EBITDA	31 KB	45 Kb
	Reconciliation of Net Cash Provided by Operating Activities to EBITDA	30 Kb	51 Kb
	Calculation of EBITDA to Net Sales, Continuing and Discontinued Operations for quarter and nine months ended Septermber 30, 2007	18 Kb	39 Kb
The Corporation calculates Earnings before Interest, Income Taxes, Depreciation, Depletion and Amortization ("EBITDA") as net earnings (loss) before interest expense, income tax expense (benefit) and depreciation, depletion and amortization expense. EBITDA is also before the cumulative effect of a change in accounting principle, if applicable. EBITDA is not a measure of financial performance under GAAP. Accordingly, it should not be considered as a substitute for net earnings (loss), operating earnings (loss), cash flow provided by operating activities or other income or cash flow data prepared in accordance with GAAP. However, the Corporation's management believes that EBITDA may provide additional information with respect to the Corporation's performance or ability to meet its future debt service, capital expenditures and working capital requirements. The ratio of EBITDA to consolidated net sales, continuing and discontinued operations is an additional measure of financial performance. Because EBITDA excludes some, but not all, items that affect net earnings and may vary among companies, the EBITDA presented by Martin Marietta Materials may not be comparable to similarly titled measures of other companies.
	Calculation of Consolidated Debt-to-Consolidated EBITDA, as defined, at March 31, 2008	11 Kb	25 Kb
Consolidated Debt-to-Consolidated EBITDA is calculated as total long-term debt divided by Consolidated EBITDA, as defined, for the trailing twelve months. Consolidated EBITDA is generally defined as earnings before interest expense, income tax expense, and depreciation, depletion and amortization expense for continuing operations. Additionally, stock-based compensation expense is added back and interest income is deducted in the calculation of Consolidated EBITDA. Certain other nonrecurring items and noncash items, if they occur, can affect the calculation of Consolidated EBITDA. The Corporation presents this ratio, as it is a covenant within the Corporation's $325,000,000 five-year revolving credit agreement. Under the agreement, the Corporation's ratio of Consolidated Debt-to-Consolidated EBITDA, as defined, for the trailing twelve months can not exceed 2.75 to 1.00 as of the end of any fiscal quarter. The covenant has certain exceptions related to qualifying acquisitions, as defined.
	Gross Margin Excluding Freight and Delivery Revenues and Operating Margin Excluding Freight and Delivery Revenues for quarter ended March 31, 2008 and 2007	16 Kb	32 Kb
The Corporation calculates gross margin excluding freight and delivery revenues as gross profit divided by net sales and operating margin excluding freight and delivery revenues as earnings from operations divided by net sales. The Corporation presents these ratios calculated based on net sales as opposed to total revenues, as it is consistent with the basis by which management reviews the Corporation's operating results. Further, management believes it is consistent with the basis by which investors analyze the Corporation's operating results given that freight and delivery revenues represent pass-through income and have no mark-up. Gross margin and operating margin calculated as percentages of total revenues represent the most directly comparable financial measures calculated in accordance with generally accepted accounting principles.
	Reconciliation of Net Cash Provided by Operating Activities to Free Cash Flow, 2003 to 2007	10 Kb	19 Kb
Martin Marietta Materials calculates Free Cash Flow as net cash provided by operating activities less capital expenditures and dividends paid. Proceeds from divestitures of assets are then added to determine Free Cash Flow.
	Reconciliation of Earnings Per Share	12 Kb	38 Kb
The reconciliation includes the following: Earnings per diluted share for the quarter and year ended December 31, 2006 to earnings per diluted share excluding write off of composite trailer business; Earnings per diluted share for the year ended December 31, 2005 to earnings per diluted share excluding favorable tax items and the pro forma effect of expensing stock options; and Earnings per diluted share to earnings per diluted share excluding discrete income tax events and land sale gains for the quarters ended September 30, 2006 and 2005.