Martin Marietta Materials

1. Martin Marietta Materials

2. Where Are We…Current State of U.S. Economy

3. Where Are We…Annual Aggregates Consumption + 15% + 60% + 23% + 57% - 17% % represents aggregates consumption peak-to-trough and trough-to-peak change Source: U.S. Geological Survey through Q1 2008; MLM data used for Q2 2008

4. Why Invest in the Aggregates Industry

5. Aggregates Industry Fundamentals • Barriers to entry • Consolidation • Scarcity of supply in the southern United States • Limited transportation availability • Limited distribution sites

6. Why Invest in Martin Marietta Materials

7. Key Factors – Martin Marietta Materials • Superior locations • Intrinsic value of mineral reserves • Strong growth profile • Margin improvement • Track record of performance • Investor focused

8. Aggregates Business Profile - 2007 74% of Aggregates Business’ 2007 net sales from southern United States Mideast Group Southeast Group West Group

9. Scarcity of Aggregates Supply

10. Outstanding Distribution Network –Rail & Water Markets

11. Aggregates Supply U.S. consumption = 3.0B tons annually * Average quarry produces 1M tons annually Barriers to entry can limit new quarry openings 3% GDP growth 100M additional tons required annually Additional volume predominantly in southern U.S. * Per U.S. Geological Survey

12. Valuable Mineral Reserves Estimated Reserve Value ~ $9 B • Assumptions: • Owned reserves 52% / Leased reserves 48% as disclosed in Form 10-K for year ended December 31, 2007. • Value of $1/ton for owned reserves and $0.40/ton for leased reserves. • Value is highly dependent on specific quarry location.

13. Growth!!!

14. Population Growth NC 22% Rank – #7 GA 8% TX 19% Rank - #4 Rank – #8 FL 5% Rank – #3 Percentage of 2007 Aggregates business’ net sales Rank of percent change - population from 2000 to 2030 (source: Census Bureau)

15. Growing Infrastructure Demand

16. Growing Infrastructure Demand

17. Demand Segments 2007 Infrastructure 48% Commercial 30% Estimated percentage of 2007 aggregates product line shipments Note: These percentages do not vary significantly across markets, with the exception of Florida which is dominated by infrastructure demand.

18. Aggregates BusinessOperating Margin Improvement • 1,188 basis points (actual) • 1,000+ basis points (target)

19. Aggregates Scarcity = Increased Pricing Latest volume guidance of down 3% to 6% ASP growth over next 10 yrs (5% - 7%) 6% - 8% 10 yr average ASP 20 yr average ASP Selling price is established locally at the point of sale and is subject to competitive and other factors at each locality. ASP increases reflect the average of the Corporation’s selling price across all markets, some of which may have already been implemented. Local prices can vary significantly from this average.

20. Cost Reduction Initiatives • Excellent Best Practices Program • Increased Plant Automation • Overhead Reduction • Better Information Systems • Effective Management of Benefits Cost

21. Consolidated Headcount Reduction 6,400 6,000 5,700 5,600 5,400 5,200 Earnings from operations per average number of employees up 206% over five-year period ended December 31, 2007 Hourly Salaried Note: Headcount equal to average number of employees

22. Capital Initiatives Bahama Rock

23. Capital spending has been focused on the long-haul distribution network Current priority – expand key Southeast locations 2008 capital spending expected to be approximately $250 million 2009 capital spending ~ $200 million Capital Spending Priorities

24. Capital Projects ProductionCapacity Expansion (tons) Quarry/StateSpend ($M)TimingFromTo COMPLETED Lemon Springs, NC$20 20061.5M3.5M North Troy, OK$40 2006 ---5.0M Three Rivers, KY$50 20075.5M8.0M+ Weeping Water, NE$35 Q4 20072.0M3.5M UNDERWAY Augusta, GA$55 2008 2.0M6.0M FUTURE Junction City, GA$75 - $802009 - 20102.5M8.0M Columbia, SC$40 - $502009 - 20102.0M6.0M Camak, GA$45 - $5520112.0M6.0M Macon, GA$70 - $802011 - 20122.5M8.0M GREEN SITES Fayetteville, NC$6 2008 ---1.0M by 2011 Selma, NCUnknown 2009 - 2010 ---1.0M by 2013

25. Capital Projects

26. Performance – Return Metrics

27. Total return inclusive of dividends as of December 31, 2007 Performance - Shareholder Return S&P Materials 10 year return not available

28. Specialty Products

29. Specialty Products Financials ($M)

30. Consolidated Financial Information Pensacola Yard

31. Consolidated Financials ($M) Six Months Ended Percent June 30, Change 2008 2007 Net Sales(1) $ 924 $ 941 (2%) Operating Earnings(1) $ 147 $ 194 (24%) Net Earnings $ 85 $ 116 (27%) Earnings per Diluted Share $ 2.02 $ 2.62 (23%) (1) Net sales and operating earnings are from continuing operations as presented in the June 30, 2008 Form 10-Q.

32. Consolidated Financials ($M) Year Ended Percent December 31, Change 2007 2006 Net Sales(1) $1,968 $1,930 2% Operating Earnings(1) $ 433 $ 391 11% Net Earnings $ 263 $ 245 7% Earnings per Diluted Share $ 6.06 $ 5.29 15% • Net sales and operating earnings are from continuing operations as presented in 2007 Annual Report.

33. Capital Structure Objectives • Leverage target of 2.0x – 2.5x Debt-to-EBITDA 2.55x at June 30, 2008 • Outside range due to financing for Vulcan transaction • Use available free cash to pay down outstanding debt to move within targeted range by 12/31/08 • Maintain solid investment grade credit rating • For outstanding debt, adjust fixed-to-floating ratio to 20% - 30% floating

34. Uses of Cash ($M)

35. Cash Returned to ShareholdersFive Years Ended December 31, 2007

36. What Happens During the Cycle $ Millions $ per share Note: Net earnings and EPS excludes cumulative effects of changes in accounting principles.

37. What Happens in the UP Phase of the Cycle $ Millions $ per share Assumptions: ** 2008 base year ** Annual CAPEX $225M ** 5%, 6% or 7% annual volume and price growth ** No share repurchases ** 3% annual cost growth ** Cash pays down short-term debt then accumulates

38. The document attached represents one part of a presentation being made. It is not a complete record of the presentation because it does not reflect the lengthy oral comments which will be part of the presentation. This document is not intended to be a substitute for our Form 10-K or other SEC filings.Further, while we may make presentations from time to time, please understand that we do not undertake any obligation to update any information contained in these materials.Finally, some of the statements in this presentation are forward-looking in nature. Any forward-looking statements are, by their nature, uncertain and dependent upon numerous contingencies, including the accuracy of the assumptions underlying the statements, which could cause actual results and events to differ materially from those indicated in such forward-looking statements. See the risk factors listed in the Corporation’s current annual report and Forms 10-K, 10-Q and 8-K reports filed with the Securities and Exchange Commission. Other factors besides those may also adversely affect the Corporation and may be material to the Corporation.If you have any questions or comments, please contact Investor Relations at 919-783-4540.   Thank you.