1. 1 Martin Marietta Materials

2. 2 Changes in Aggregates Industry Fundamentals Industry consolidation Barriers to entry Scarcity of supply in the southern United States Limited transportation availability Limited distribution sites

3. 3 Our Strategy – Capture Value from Changing Fundamentals Loading barges at Three Rivers Quarry, Kentucky

4. 4 Strategy Assemble leading set of assets in high growth Southeast and Southwest areas Focus on long haul transportation to build competitive advantage Focus on best practices and information systems to drive cost performance

5. 5 Company Profile – 2005 Aggregates Production and Sales 70% of 2005 net sales from southern United States

6. Scarcity of Aggregate Supply Limestone Hard Rock Information from the Department of Interior 6

7. 7 Population Movement Percentage of 2005 net sales Rank of percent change – population 2000 to 2030 (source: Census Bureau) Rank – #3 Rank - #4 Rank – #7 Rank – #8 TX 18% GA 8% NC 18% FL 5%

8. 8 Aggregates Supply U.S. consumption = 3.2B tons annually * Additional volume predominantly in southern U.S. Barriers to entry can limit new quarry openings Average quarry produces 1M tons annually 3% GDP growth 100M additional tons required annually * Per U.S. Geological Survey

9. 9 Transportation Mode 74% Truck 16% Rail 10% Water 93% Truck 7% Rail (71.2 million tons) (203.2 millions tons)

10. 10 Transportation Economies of Scale 0 500 1,000 13550 45,000 tons per ship 1,800 tons per barge 100 tons per rail car 20 tons per truck.4 - 1.2 Cents / Ton Mile 2 - 4 Cents / Ton Mile 6 - 11 Cents / Ton Mile 15 - 35 Cents / Ton Mile Transportation Mode – Cost Per Ton Mile

11. Producing Locations Major Shipping Points Other Shipping Points Producing Locations Major Shipping Points Other Shipping Points Maturing Distribution Network – Water Markets St. Croix Aruba Trinidad Guyana Suriname Nova Scotia Prince Edward Island New York City Linden Philadelphia Wilmington, DE Sparrows Pt. Wilmington, NC Charleston Savannah Brunswick Jacksonville Freeport Bahamas Tampa Pascagoula New Orleans Beaumont LakeCharles Lake Charles MobilePensacola Panama City Port Canaveral Three Rivers Kaskaskia Houston 11

12. 12 Scarcity = Increased Pricing Based on latest guidance of 1% - 3% volume decrease (1 ) 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. (1) 12.5%-13.5%

13. 13 Demand Segments Infrastructure 45% 2005 Commercial 26% 2006 2007 Infrastructure   Commercial   Residential   Other   Estimated percentage of 2005 shipments Note: These percentages do not vary significantly across markets, with the exception of Florida which is dominated by infrastructure demand.

14. 14 Cost Reduction Initiatives Lemon Springs Quarry

15. 15 Cost Reduction Initiatives Excellent Best Practices Program Increased Plant Automation Overhead Reduction Better Information Systems Effective Management of Benefits Cost

16. 16 Plant Automation Sensors maximize efficient flow of material through crushing process Results in lower operating costs (cost per ton produced) Reduces headcount (allows one individual to run plant via sensors, cameras, etc.)

17. 17 Headcount Reduction Sales per employee up 81% over five years 6400 5900 5800 5550 Hourly Salary 6900 Note: Sales per employee based on annualized September 30, 2006 sales.

18. 18 Capital Initiatives Bahama Rock

19. 19 Capital Spending Priorities Capital spending has been focused on the long-haul distribution network Current priority-recapitalize the Southeast operations 2007 capital spending expected to be $235 million

20. 20 Long-Haul Network - Three Rivers (KY)  Second largest capital project - $48 million budget  New plant and load out provide variable cost savings  Forecasted after-tax Internal Rate of Return - 23%

21. 21 Three Rivers (KY) – Strategic Location Key site in long-haul transportation optimization strategy Shipments and deliveries via barge, ship and rail Diversified products and transportation modes provide competitive advantage

22. 22 Underground Mines Largest operator of underground aggregates mines in the United States (15 locations) Neighbor-friendly alternative Production costs higher than surface mines Long-term capital focus North Indianapolis Mine

23. 23 Operating Margin Attain 30% + operating margin in 5 years Continued pricing improvements Ongoing cost reduction initiatives : –Plant automation –Headcount and overhead reduction

24. 24 Aggregates Financials ($M) Nine Months Ended Percent September 30, Change Nine Months Ended Percent September 30, Change 2006 (1) 2005 (1) 2006 (1) 2005 (1) Net Sales $1,359 $1,219 11% Operating Earnings $ 267 $ 220 21% Operating Margin 19.6% 18.1% (1) All amounts presented are from continuing operations. Prior period amounts have been recast for current year discontinued operations.

25. 25 Aggregates Financials ($M) Year Ended Percent December 31, Change Year Ended Percent December 31, Change 2005 (1) 2004 (1) 2005 (1) 2004 (1) Net Sales $1,625 $1,411 15% Operating Earnings $ 299 $ 224 34% Operating Margin 18.4% 15.8% (1) All amounts presented are from continuing operations as presented in 2005 Annual Report.

26. 26 Magnesia Specialties

27. Market Overview – Industrial 27

28. Market Overview - Environmental Thioguard ® 28

29. Market Overview – Rubber & Plastics 29

30. Market Overview - Other 30

31. 31 Magnesia Specialties Financials ($M) 2006 2005 2006 2005 Net Sales $ 109 $ 90 20% Operating Earnings $ 26 $ 18 42% Operating Margin 23.7% 20.1% Nine Months Ended Percent September 30, Change Nine Months Ended Percent September 30, Change

32. 32 Magnesia Specialties Financials ($M) Year Ended December 31, Year Ended December 31, 2005 20042003 2005 20042003 Net Sales $ 123 $ 106 $ 86 Operating Earnings $ 24 $ 18 $ 6 Operating Margin 19.4% 16.6%7.0%

33. 33 Restructured Magnesia Specialties Refractories 44% 20002005

34. 34 Financial Information Pensacola Yard

35. 35 Selected Balance Sheet Data (1) (1) The calculation of net debt to capitalization is available on the Company’s website and in the Company’s annual report.

36. 36 Materials Financials ($M) Nine Months Ended Percent September 30, Change Nine Months Ended Percent September 30, Change 2006 2005 2006 2005 Net Sales (1) $1,472 $1,311 12.3% Operating Earnings (1) $ 286 $ 227 25.8% Net Earnings $ 183 $ 145 26.3% Earnings per Diluted Share $ 3.93 $ 3.06 28.4% (1) Net sales and operating earnings are from continuing operations. Prior period amounts have been recast for current year discontinued operations.

37. 37 Materials Financials ($M) Year Ended Percent December 31, Change Year Ended Percent December 31, Change 2005 2004 2005 2004 Net Sales (1) $1,755 $1,521 15.4% Operating Earnings (1) $ 309 $ 230 34.0% Net Earnings $ 193 $ 129 49.2% Earnings per Diluted Share $ 4.08 (2) $ 2.66 53.4% (1) Net sales and operating earnings are from continuing operations as presented in 2005 Annual Report. (2) Earnings per diluted share includes the reversal of $5.9 million, or $0.12 per diluted share, of tax reserves upon the expiration of the statute of limitations for federal examination of the 2001 tax year.

38. 38 Uses of Cash ($M) Pension Investment $ 12$ 15$ 51Pension Investment $ 12$ 15$ 51 Capital Investment$213 $221$163Capital Investment$213 $221$163 Share Repurchase$113 $176$ 75Share Repurchase$113 $176$ 75 DividendsDividends (20% per share increase in 9/06) $ 34 $40$ 37 (20% per share increase in 9/06) $ 34 $40$ 37 Cash on Hand$ 23 $ 77 $162Cash on Hand$ 23 $ 77 $162 YTD 9/30/06 20052004

39. Cash Returned to Shareholders $20 $28 $49 $111 $216 In millions Dividends Share Repurchases 39

40. 40 The document attached represents one part of a presentation which has been or will be 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, 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. If you have any questions or comments, please contact Investor Relations at 919-783-4660. Thank you.