#1A Martin Marietta INVESTOR PRESENTATION JANUARY 18, 2019#2DISCLAIMER Statement Regarding Safe Harbor for Forward-Looking Statements This presentation may contain forward-looking statements - that is, information related to future, not past, events. Like other businesses, Martin Marietta is subject to risks and uncertainties which could cause its actual results to differ materially from its projections or that could cause forward- looking statements to prove incorrect, including the risks and uncertainties discussed in Martin Marietta's most recent Annual Report on Form 10-K, quarterly reports on Form 10-Q and current reports on Form 8-K, which have been filed with the Securities and Exchange Commission (SEC) and are readily accessible on the SEC's website and the Company's website. Except as legally required, Martin Marietta undertakes no obligation to publicly update or revise any forward- looking statements, whether resulting from new information, future developments or otherwise. Non-GAAP Financial Measures This presentation contains certain financial measures presented on a non-GAAP basis. These non- GAAP financial measures are not in accordance with, nor are they a substitute for, GAAP measures. Reconciliations of non-GAAP financial measures to the most directly comparable GAAP financial measures are provided in the Appendix to this presentation. Investor Presentation - January 2019 A Martin Marietta 2#3WHY INVEST IN MARTIN MARIETTA? ?? Leading U.S. natural resource-based building materials company with OVER 100 YEARS of high-quality aggregates reserves Disciplined execution of a SOLID LONG-TERM STRATEGIC PLAN 용용 INDUSTRY-LEADING 000 safety, environmental and financial performance and operational excellence Investor Presentation - January 2019 (+) Steadfast commitment to CORE VALUES STRATEGICALLY POSITIONED in high-growth markets with attractive underlying fundamentals Capital allocation priorities to MAXIMIZE LONG-TERM SHAREHOLDER VALUE дд EXPERIENCED executive and local management teams 3#4MARTIN MARIETTA AT A GLANCE loa 8,800 + Employees - 300 + Aggregates Quarries, 2 Cement Plants 9 Asphalt Plants As of June 30, 2018 Investor Presentation - January 2019 12 Mg • U.S. based company and Martin Marietta Mines & Yards 144 Ready Mixed Concrete Plants 2 Magnesia Specialties Facilities · • • member of the S&P 500 Index Leading supplier of aggregates and heavy-side building materials used in infrastructure, nonresidential and residential construction projects (Building Materials business) Operations spanning 27 states, Canada and the Bahamas Producer of magnesia-based chemicals products and dolomitic lime (Magnesia Specialties business) 4#5BUILDING A WORLD-CLASS ORGANIZATION#6MARTIN MARIETTA'S JOURNEY BUILDING A SOLID BASE FOCUSING ON FUNDAMENTALS EXPANDING THE PLATFORM A Martin Marietta Martin Marietta BUILDINGA WORLD-CLASS ORGANIZATION 1994 TO 2006 Becoming a leading aggregates producer in the United States $750M market capitalization (1994) 1994 Listed on New York Stock Exchange 1995 to 2003 - Actively participated in industry consolidation (56% of 2003 sales derived from acquisitions) 1998 Achieved $1B in revenues 2003 to 2006- Focused on internal capital investment projects to provide capacity expansion in growing markets 2005 Shipped peak aggregates volumes of 205M tons Other highlights: 2007 TO 2010 Navigating the business during the Great Recession $4.2B market capitalization (2010) 2007 Achieved prior peak EBITDA of $591M 2009- Experienced 40 percent decline in aggregates tons since 2005 peak volumes 2010 Launched long-term strategic plan (SOAR) Other highlights: • Throughout the Great Recession, Martin Marietta remained profitable and was the only company in its industry to not cut or suspend dividends #1 or #2 in 65% of markets 2011 TO 2017 Transforming the business through aggregates-led expansion $14B market capitalization (2017) 2011 Completed the River for the Rockies asset exchange, the largest asset swap in the U.S. building materials industry 2014 - Became the largest supplier of construction aggregates, cement and ready mixed concrete in Texas through the $2.757B acquisition of TXI 2014 Entered S&P 500 - 2016 - #9 performer in the S&P 500 2017 Achieved EBITDA of over $1B Other highlights: 2018 AND BEYOND Elevating Martin Marietta from an industry leader to a globally-recognized world-class organization 2018 Completed $1.625B acquisition of Bluegrass Materials Company - Today #1 or #2 in 90% of markets Other highlights: • On pace for another record year . • Expanded waterborne capabilities and rail- based distribution networks • Completed 8 acquisitions . Completed 60 acquisitions Investor Presentation - January 2019 • Completed 26 acquisitions 6#7MOVING FORWARD AS A UNIFIED WORLD-CLASS ORGANIZATION Martin MISSION As a leading provider of natural resource-based building materials, Martin Marietta provides the foundation upon which our communities improve and grow. H Martin Marietta Building a World-Class Organization VALUES VISION Our goal is building a world-class organization committed to the long-term success of our employees, communities and other stakeholders. SAFETY We are uncompromising in our commitment to the safety and health of our people and the community. INTEGRITY We will do the right thing by adhering to our core values and ethical business principles. EXCELLENCE We are committed to being a role model through responsible innovation and continuous improvement. COMMUNITY Our strength and success is derived from our people and the relationships they build within our neighborhoods and cities. STEWARDSHIP Our responsibility is to make the world better today and for future generations. Investor Presentation - January 2019 7#8ACHIEVING WORLD-CLASS SAFETY TOTAL INJURY INCIDENT RATE In 2017, half of our divisions achieved a world-class total injury incident rate (TIIR) and all divisions improved TIIR compared with 2016. 2013 2014 2015 2016 2017 Martin Marietta Aggregates Industry 1 General Industry 1 World-Class Safety Level (0.90) LOST-TIME INCIDENT RATE Nearly all divisions in the Building Materials business had a lost-time incident rate (LTIR) that surpassed the world-class level in 2017. Magnesia Specialties had a 50% improvement compared with its 2016 rate. 2013 2014 2015 2016 2017 NMA. National Mining Association 2018 SENTINELS OF SAFETY AWARD Burning Springs Mine Martin Marietta NSSGA NATIONAL STONE, SAND & GRAVEL ASSOCIATION Martin Marietta Aggregates Industry 1 General Industry 1 2018 SAFETY EXCELLENCE AWARDS World-Class Safety Level (0.20) TIIR and LTIR rates are per 200,000 man hours worked. All data current as of 12/31/17. World-class levels based on general industries. 1 Reported per National Stone, Sand & Gravel Association (NSSGA) and the U.S. Bureau of Labor Statistics (BLS) Investor Presentation - January 2019 6 winners 80#9DOING BUSINESS THE RIGHT WAY Martin Marietta will conduct its business in strict compliance with applicable laws, rules, regulations, and corporate and operating unit policies, procedures and guidelines, with honesty and integrity, and with a strong commitment to the highest standards of ethics. It is the obligation of all directors, officers, employees and consultants, as well as contingent and temporary employees of Martin Marietta, to adhere to these standards. Investor Presentation - January 2019 A Martin Marietta Code of Ethical Business Conduct www.martinmarietta.com NYSE:MLM 9#10STRIVING FOR A MORE SUSTAINABLE FUTURE 2017 A Martin Marietta SUSTAINABILITY REPORT BUILDING CARING. GROWIN NVIRONMENTAL TEWARDSHIP Pay the Norte Canada We are committed to continuously improving our operations and conserving natural resources to maximize our contributions to society while minimizing our environmental impact. We will continue to embed sustainable processes and behaviors OUR COMMITMENT STATEMENT Martin Marietta's corporate environmental stewardship programs are guided by a combination of Industry best practice, innovative operational improvements and the adoption of clean technologies, Managing Greenhouse Gas Emissions Greenhouse gas (GHG) emissions from our operations are attributed to the consumption of carbon-band, such diesel, gandline, propana and natural gas. Thes power equipment, induding our mobile fit, and heat there at our me plant, magnesia-based products pram and two camant plants prawde managemen gour mobile fat and implementing GHG réduction processes and technologies that also improve operational emoences. Since 2010, the antal year of Our Strategic Operating Analysis and Review (SOAR process, we have implememad multiple operating instans with the potent for broader rollout across our sites. This prepares us for medium-and long-tarm sk mitigation dated with GHG emissions we asuring and improving finandal sustainability. Some examples of natives include: Using atamative fuals such as bio-diesel Implementing state-of-the-art emissions monitoring equipment and real-time fleet management software Converting from quarry trucks to conveyor belt systems to reduce fuel usa In managing our GHG emissions and leveraging lessons learned from localitatives, we will identity corporate- wide internal kay indicators and sat performance targets Managing Water Use, Waste and Dust Our industry uses water and ganaratas non-salable products and out a Our GHG as a byproduct of uct of operations. As with our amessons strategy, we test and rollout new processes and technologies that can reduce the impact and use of watat and manage and duce waste and dust emissions Some examples of the technologies and process changes we have implemantad include Rausing cooling water streams to improve water usage rate • Instaling deep water production walls to reduce use of surface water Partnering with area contractors to recycia wasta asphalt and concrete Applying environmentally friendly dust suppressants on unpaved mine roads $200M committed to inwering in male equipment that dehan improved operating efficiencies and GHG emissions profiles from 2016-2018 19% of heave at our Midhan Camenta, improve from the 10 percent reported in our 2015 Su Martin Marietta SUSTAINABILITY is an integral part of Martin Marietta's strategy, annual planning process and day-to-day business. We are committed to fulfilling our responsibilities to our stakeholders. SAFE OPERATIONS Protecting all who come in contact with our products and operations, and creating a culture of responsible leadership ETHICS TRAINING PROVIDES EMPLOYEES WITH TOOLS TO MAKE ETHICAL DECISIONS Martin Marietta damands an ethical workplace We work to ensure that all employees have the tools necessary to mata proper decisions, including an easy-to-understand Code of Ethical Businest Conduct and an athics hotine. Martin Marietta also provides company-wide uthics training wary year avaid onsine and in-person "Ethics training 't just about chicoffice said the classes are designed to place a employees on the same page when it comes to addressing athical demmas 8,000+ teaching right versus wrong, in about employees faaching right versus right said Talent Development Specialist Ray Rogers "Too oftan, ethical decisions are not a clear-cut choice of good versus Our goal is to create ethics training that completed ethics training in 2017. provider each amployee with the skills to arrive at a reasoned rational ethical decision that others can understand Executive Vice President, General Counsel and Corporate Secretary Rosalyn Bar Martin Marietta's "Ethical conduct in our business dealings greatly affects morale and has a substantial impact on our raputation and overall success" sald Bar "By providing every employee with the very tools necessary this training let our amployees know to make the right decision ave we care about them and are committed to maintaining an athical workplace In 2017, the three-hour in-person training ssions began with an in-depth discussion of Martin Manetta's Mesion, Vision and Values and induded group wards designed to engage employses and familaze them with the available too. Each ethics das abe covered a variety of topics, induding our policies on sexual harassment, procurement cards, computer usage and proprietary information PLANNING FOR A SUCCESSFUL FUTURE The 2017 Marin Marietta Scholarship program made company history by increasing the number of recipients from so to aight. Since the programs inception, more than $1 million have bein awarded in scholarships. We are to show this year's night students grow through their college careers CASSICE CAMPBELL University of North Tea Wensheche High School ITX Cassie led Sunday school cached childen on the half and held down ajol while awning a spot in the Chris Malahan Camant Rant Maintenance Apprentice Daniel Mine ASHLEY ROLON TA&M Uni Cedar Creek High School (TX) ed Ashleyredient of her high school's Soans Olymped dub She and a perner cop in the Water Quality Dion and meeld at regionals Ashley is the daughter of Central Ten Ready Mea Manage has on. JEROD SCHWANDT North Carolina State La View Academy home adol Jed volunteered with a leal food bark, eeched children and NICHOLAS CIMONO •Minere School at Peak to Peak Charter School ICO Wholesaleda high school National Honor Society and shining in productions as the mate Vicholas's mother Kathleen Demand District Regional Fare Manager in the Rocky Mount Randy MDistrict GAGE DOLLAR Allama State Uni Central High School A rocketry and pic speaking Jedfather Pedmont District Field Services T SARAH STORCH Texas State University San Marc High School (TX) Ahh food of her des On graduation deg she was in the top 4 percent Sarah is the daughter of Senior Accounting Special of the Gage the of Auntien Cay Quarry Quality Au Saper hd Make LUIS PIMENTEL George of Th Heritage High School (GA In high school, Luis med top honom tell Cub father in Query Rock Splitter Laie mantel Katrina Stor MICHAEL SOSNOW DePew Uny Gel-Cal High School N Michael place to stay po and play follan Dew Unity He hopes to puta lew perhaps are day an Mich is the of incana District Regional Land Manager John Samoa 19/MC Please visit our Sustainability website to learn more about Martin Marietta's sustainable business practices and commitments, including our pledge to continue to reduce emissions and to establish targets for improvement. Investor Presentation - January 2019 利 EMPLOYEE WELL-BEING Supporting and investing in our people - the foundation of our success COMMUNITY WELL-BEING Being a responsible neighbor and supporting the communities that are home to our operations ENVIRONMENTAL STEWARDSHIP Protecting the Earth's resources and reducing our environmental impact 10#11PROACTIVELY ENGAGING WITH SHAREHOLDERS Overboarding Policy Annual Election of Directors Mandatory Retirement Non- Management & Independent Directors Meet Regularly Without Management Age for Directors CORPORATE GOVERNANCE HIGHLIGHTS ✓ Adopted proxy access ✓ Eliminated staggered board – Directors - 6 current or former public company CEOs Martin Marietta Annual Board and Committee Self- Assessment Independent Lead Director No Pledging or Hedging of Martin Marietta Stock SHAREHOLDER RIGHTS AND GOVERNANCE PRACTICES Majority Voting for Shareholders Proxy Access Clawback Policy Robust Stock Ownership Requirements No Poison Pill elected for 1-year terms Established robust stock ownership guidelines for Officers and Directors ✓ Implemented hedging and pledging policy ✓ Adopted clawback policy ✓ Implemented majority voting standard ✓ Eliminated shareholder rights plan ✓ Added 3 new Board members since 2016 ✓ Published Annual Sustainability Report 66 years old average Director age BOARD WITH DIVERSE SKILLS AND EXPERIENCE 11 years average Director tenure 30% of directors are women or minorities As reported in Martin Marietta's 2018 Annual Meeting of Shareholders Proxy Statement dated April 18, 2018 Investor Presentation - January 2019 11 11#12STRATEGIC PLANNING PROCESS#13PLANNING FOR LONG-TERM SUCCESS WITH STRATEGIC OPERATING ANALYSIS AND REVIEW (SOAR) Martin Marietta SOAR PROVIDES THE EXECUTION FRAMEWORK FOR MARTIN MARIETTA'S LONG-TERM STRATEGIC PLAN 00 Expand platform for growth in markets with attractive underlying fundamentals Align the business profile to generate industry-leading operational and financial performance Allocate capital while maintaining financial flexibility Investor Presentation - January 2019 13#14ASSESSING MARKET ATTRACTIVENESS AND GROWTH OPPORTUNITIES A Martin Marietta GEOGRAPHY IS CRITICALLY IMPORTANT AS BUILDING MATERIALS PRODUCTS ARE PRIMARILY SOURCED AND SOLD LOCALLY. MARTIN MARIETTA HAS FOCUSED ON STRATEGICALLY POSITIONING THE BUSINESS TO BE AGGREGATES LED IN HIGH-GROWTH GEOGRAPHIES. POPULATION GROWTH AND/OR DENSITY BUSINESS AND EMPLOYMENT DIVERSITY SUPERIOR STATE FINANCIAL POSITION Drives increased per capita heavy-side building materials consumption Investor Presentation - January 2019 828 Bolsters greater economic and market stability Supports public infrastructure growth 14#15STRATEGICALLY POSITIONING THE BUSINESS IN ATTRACTIVE GEOGRAPHIES Martin Marietta MARTIN MARIETTA HAS A #1 OR #2 POSITION IN 90% OF THE MARKETS IN WHICH WE OPERATE; UP FROM 65% IN 2009 Northern California Cascadia Front Range Southern California Arizona Sun Corridor Martin Marietta Building Materials business locations Megaregions, as defined by America 2050 Investor Presentation - January 2019 Texas Triangle Great Lakes Northeast Piedmont Atlantic Florida Gulf Coast SIGNIFICANT STRATEGIC PRESENCE IN 6 OF 11 MEGAREGIONS Majority of the nation's population and economic growth through 2050 will occur in 11 megaregions, defined as large networks of metropolitan population centers covering thousands of square miles 15#16ALIGNING TODAY'S BUSINESS PROFILE AGGREGATES-LED • Leading aggregates positions in 90% of our markets • • Local businesses in markets with strong underlying growth fundamentals High barriers to entry Investor Presentation - January 2019 A Martin USDOT 382883 Martin Marietta STRATEGIC CEMENT Complements leading aggregates positions • Serves as a raw material for downstream business TARGETED DOWNSTREAM Complements leading aggregates positions Markets that are historically vertically integrated 16#17EXECUTING ON SOAR TO EXPAND THE BUSINESS A Martin Marietta STRENGTHENED AGGREGATES FOOTPRINT WITH COMPLETION OF BLUEGRASS ACQUISITION IN APRIL 2018 Investor Presentation - January 2019 MARKET ATTRACTIVENESS DRIVERS STRATEGIC RATIONALE • Aggregates positions in high-growth regions of Southeast and Mid-Atlantic • Provides over 2 billion tons of high-quality aggregates reserves New growth platform in the southern portion of Northeast Megaregion (Maryland) • Expands product offerings to new and existing customers • Complementary to existing southeastern footprint (Georgia) . 20 percent to 30 percent below mid-cycle aggregates demand Positions Company to meaningfully benefit from anticipated increased aggregates demand Generates best-in-class profit margins SECOND-LARGEST TRANSACTION IN COMPANY'S HISTORY 17#18EXECUTING ON SOAR TO EXPAND THE BUSINESS REPOSITIONING BUSINESS 65% in 2009 90% today #1 or #2 market positions Investor Presentation - January 2019 Martin Marietta STRENGTHENING AGGREGATES PLATFORM 4.5B TONS Reserves added since 2009 18#19FOCUSING ON OPERATIONAL EXCELLENCE Martin Marietta PURSUING PRICING OPPORTUNITIES Aggregates average selling price¹ UP $5.90 PER TON SINCE 2005 (5% compound annual growth rate) OPTIMIZING COST PROFILE 999 Aggregates gross profit per ton nearly DOUBLES ON ~40% LESS VOLUME increasing from $1.92 in 2005 to $3.82 in 2017 Note: 2005 represents peak of prior construction cycle 1 Selling price is established locally at the point of sale and is subject to specific factors at each locality. Pricing reflects the average of Martin Marietta's selling price across all regions. Local prices can vary significantly from this average. Investor Presentation - January 2019 19 19#20DELIVERING RECORD PERFORMANCE THROUGH SOAR TOTAL REVENUES $1.7B CAGR + 13.3% $4.0B 2010 2017 • Excludes $4.07 per share nonrecurring benefit from Tax Cuts and Job Act of 2017 Investor Presentation - January 2019 $375M EBITDA CAGR + 15.1% $1,004M $2.10 DILUTED EPS CAGR + 19.2% $7.18 Martin Marietta 2010 2017 2010 2017* 20#21ALLOCATING CAPITAL TO MAXIMIZE LONG-TERM VALUE Martin Marietta ACQUISITIONS ORGANIC CAPITAL INVESTMENT Investor Presentation - January 2019 RETURN OF CASH TO SHAREHOLDERS $ 21 21#22EVALUATING OPPORTUNITIES TO BUILD CRITICAL MASS Martin Marietta • • Ongoing disciplined evaluation of aggregates-led opportunities of scale. in existing and new domestic markets Opportunistic expansion through acquisitions that complement existing operations Divestitures of assets that are not consistent with stated strategic goals. 90+ TRANSACTIONS COMPLETED since becoming a public company in 1994 . ACQUISITIONS Investor Presentation - January 2019 222#23PRUDENTLY DEPLOYING CAPITAL INTO THE BUSINESS Martin Marietta ORGANIC CAPITAL INVESTMENT Any Investor Presentation - January 2019 • • Investment priorities to ensure safe, environmentally-sound and efficient operations and to provide a foundation for continued responsible growth Opportunistic land purchases for expansion of quarry footprint and reserves Organic capital investment at annual levels approximating depreciation expense over an economic cycle Selling nonoperating real estate, where appropriate, to reinvest into operations. ANNUAL CAPITAL SPENDING OF $350M TO $400M projects focused on efficiencies and returns 225 23#24ENHANCING SHAREHOLDER VALUE Martin Marietta RETURN OF CASH TO SHAREHOLDERS $ Sustainable and meaningful dividend that has been maintained or increased every quarter since becoming a public company Systematic structured share repurchases to preserve targeted leverage ratio 9 PERCENT August 2018 increase in quarterly cash dividend $1.3 BILLION RETURNED TO SHAREHOLDERS in form of dividends and share repurchases since February 2015 repurchase authorization announced Investor Presentation - January 2019 24 24#25SR5605 COMPANY OUTLOOK 2019 AND BEYOND#261 AGGREGATES CONSUMPTION HAS ONLY MODESTLY REBOUNDED FROM THE GREAT RECESSION U.S. CONSTRUCTION AGGREGATES CONSUMPTION¹ Martin Marietta heritage aggregates volumes are MODESTLY ABOVE TROUGH LEVELS and REMAIN 10% BELOW MID-CYCLE DEMAND 3.4B TONS 2006 PEAK 2.2B TONS 2010 TROUGH 2.4B TONS 2017 Source: U.S. Geological Survey (Crushed Stone and Sand & Gravel) Investor Presentation - January 2019 Aggregates volumes (tons) 205M 2005 PEAK Martin Marietta 158M 27M Tons added via acquisitions since 2008 125M 5% HERITAGE GROWTH 131M from trough levels 2010 TROUGH Heritage Acquisitions 2017 26#27BOTTLENECKS HAVE CONSTRAINED GROWTH BUT EXTEND CYCLE Martin WEATHER 00000 Investor Presentation - January 2019 CONTRACTOR CAPACITY LOGISTICS PROJECT DELAYS 27 22#28INFRASTRUCTURE MAKING NEEDED INFRASTRUCTURE INVESTMENT ^ Martin ASSURES ECONOMIC GROWTH Undeniable need to restore and modernize our nation's infrastructure exists. Construction activity should benefit from the funding provided by the Fixing America's Surface Transportation Act (FAST Act) and state and local initiatives. Dodge Data & Analytics forecasts a positive outlook for aggregates-intensive highways and streets construction in 2019. 2019 OUTLOOK 28#29OUR STATES PLAY AN EXPANDED ROLE IN PUBLIC-SECTOR ACTIVITY Martin Marietta DEPARTMENTS OF TRANSPORTATION NOVEMBER 2018 BALLOT INITIATIVES DOT NCDOT Texas Department 346 state and local infrastructure initiatives on November 6 ballot NORTH CAROLINA DEPARTMENT OF TRANSPORTATION of Transportation DEPARTMENT OF TRANSPORTATION GDOT Georgia Department of Transportation IOWADOT SMARTER I SIMPLER I CUSTOMER DRIVEN FDOT SCDOT South Carolina Department of Transportation 79% APPROVED $30B one-time and recurring funding for approved transportation initiatives across the nation INDIANA TRANSPO PORTATION INDOT ENT OF DEPARTMENT Investor Presentation - January 2019 MOT MARYLAND DEPARTMENT OF TRANSPORTATION TEXAS, NORTH CAROLINA, GEORGIA, FLORIDA AND VIRGINIA Martin Marietta beneficiary states 29 29#30NONRESIDENTIAL COMMERCIAL AND HEAVY INDUSTRIAL ACTIVITY REMAINS HEALTHY Martin Marietta Commercial and institutional construction activity should increase as supported by the Dodge. Momentum Index and Architectural Billing Index. Continued federal regulatory approvals, coupled with final investment decisions, should notably contribute to increased aggregates consumption from new energy-related projects, a significant demand driver for Texas. 2019 OUTLOOK 30#31MULTI-YEAR INDUSTRIAL PROJECTS BEGIN IN 2019 POPULATION AND ENERGY DYNAMICS DRAW MEGA PROJECTS TO TEXAS AND GULF COAST CHE Investor Presentation - January 2019 Martin Marietta Well-positioned to supply large-scale energy projects "One-stop" source for aggregates, cement and ready mixed concrete • Multi-modal delivery capabilities AGGREGATES 27.5M TONS CEMENT 1M+ TONS READY MIXED CONCRETE 2.9M CUBIC YARDS ESTIMATED HEAVY BUILDING MATERIAL PRODUCT NEEDS FOR PROPOSED ENERGY PROJECTS 31#32RESIDENTIAL GROW A Martin Marietta RESIDENTIAL CONSTRUCTION CONTINUES TO GROW Residential construction drives future nonresidential and infrastructure activity. Outlook remains robust, particularly in key Martin Marietta markets, supported by favorable demographics, job growth, land availability and efficient permitting. Six of Martin Marietta's key states consistently rank in the top 10 nationally for growth in single-family housing unit starts. 2019 OUTLOOK 32 32#33ATTRACTIVE GEOGRAPHIES DRIVE RESIDENTIAL CONSTRUCTION Martin Investor Presentation - January 2019 Martin Marietta metros ranked in Top 10 nationally Housing starts have yet to return to historical levels despite notable population gains for growth in total housing permits #1 Houston • Shortage of single-family housing units, particularly entry level homes #2 Orlando . Market will adapt once mortgage rate increases stabilize #3 Raleigh Our leading southeastern and southwestern states offer superior #5 Charlotte opportunities for housing gains driven by available land and comparatively lower taxes #6 Atlanta #7 Austin Growth in number of total housing permits (TTM October 2018) Source: US Census 33#34GEOGRAPHY MATTERS Investor Presentation - January 2019 ROCKY MOUNTAIN MIDEAST MIDWEST MIDATLANTIC SOUTHWEST AGGREGATES SOUTHEAST SOUTHWEST READY MIX and CEMENT A Martin Marietta 34#35BENEFITING FROM THE INCREASING STRENGTH OF THE CURRENT CONSTRUCTION CYCLE TOP 9 STATES * MID-CYCLE AGGREGATES DEMAND TEXAS COLORADO NORTH CAROLINA GEORGIA 20% below At mid-cycle 20% above 10% below 10% above Martin Marietta FORECASTED POPULATION GROWTH 2017 - 2040 FISCAL HEALTH 44% AAA 40% AA 20% below At mid-cycle 20% above 10% below 10% above 22% AAA 20% below At mid-cycle 20% above 10% below 10% above 23% AAA 20% below At mid-cycle 20% above 10% below 10% above * Martin Marietta's top 9 revenue-generating states based on 2017 Building Materials net sales by state of destination and adjusted for Bluegrass Management calculation based on aggregates consumption per capita multiplied by estimated state population Sources: U.S. Bureau, Population Division (December 2017) and Weldon Cooper Center for Public Service (May 2016) U.S. State Ratings and Outlooks April 13, 2018 Source: S&P Global 35#36BENEFITING FROM THE INCREASING STRENGTH OF THE CURRENT CONSTRUCTION CYCLE TOP 9 STATES * MID-CYCLE AGGREGATES DEMAND IOWA 20% below At mid-cycle 20% above 10% below 10% above Martin Marietta FORECASTED POPULATION GROWTH 2017 - 2040 FISCAL HEALTH 9% AAA SOUTH CAROLINA 25% AA+ 20% below At mid-cycle 20% above 10% below 10% above FLORIDA MARYLAND INDIANA * Martin Marietta's top 9 revenue-generating states based on 2017 Building Materials net sales by state of destination and adjusted for Bluegrass 35% AAA 20% below At mid-cycle 20% above 10% below 10% above 20% below At mid-cycle 20% above 17% AAA 10% below 10% above 20% below At mid-cycle 20% above 10% below 10% above Management calculation based on aggregates consumption per capita multiplied by estimated state population 7% AAA Sources: U.S. Bureau, Population Division (December 2017) and Weldon Cooper Center for Public Service (May 2016) U.S. State Ratings and Outlooks April 13, 2018 Source: S&P Global 36#37BENEFITING FROM THE INCREASING STRENGTH OF THE CURRENT CONSTRUCTION CYCLE Investor Presentation - January 2019 5 Martin Marietta . In Martin Marietta's view, the current construction cycle has a long runway for continued steady growth and is not nearing its peak in the regions in which we operate. Throughout our portfolio, underlying market fundamentals, including employment, population growth and state fiscal health, are robust. Martin Marietta has both the ability and capacity to supply the needed heavy-side building materials to meet product demand. Martin Marietta remains confident about its near-term and long-term outlooks given our disciplined execution of our strategic business plan, lengthy track record of operational excellence and shareholder value creation. 37#38WELL-POSITIONED FOR LONG-TERM SUCCESS Leading U.S. natural resource-based building materials company with OVER 100+ YEARS of high-quality aggregates reserves ?? Disciplined execution of a SOLID LONG-TERM STRATEGIC PLAN 000 (+ Steadfast commitment to CORE VALUES STRATEGICALLY POSITIONED in high-growth markets with attractive underlying fundamentals INDUSTRY-LEADING safety, environmental and financial performance and Capital allocation priorities to MAXIMIZE LONG-TERM SHAREHOLDER VALUE EXPERIENCED executive and local management teams operational excellence Investor Presentation - January 2019 38#39CONTACT INFORMATION A Martin Marietta CORPORATE HEADQUARTERS Martin Marietta 2710 Wycliff Road Raleigh, NC 27607 +1 919-781-4550 INVESTOR RELATIONS +1 919-783-4691 WEBSITE www.martinmarietta.com Investor Presentation - January 2019 39#40APPENDIX#41DEFINITIONS AND RECONCILIATIONS OF NON-GAAP FINANCIAL MEASURES Martin Marietta Earnings before interest, income taxes, depreciation, depletion and amortization (EBITDA) is a widely accepted financial indicator of a company's ability to service and/or incur indebtedness. EBITDA is not defined by generally accepted accounting principles and, as such, should not be construed as an alternative to net earnings or operating cash flow. YEAR ENDED DECEMBER 31 ($ in millions) 2010 2017 NET EARNINGS ATTRIBUTABLE TO MARTIN MARIETTA Add back: $ 97 $ 713 Interest expense Income tax expense (benefit) for controlling interests Depreciation, depletion and amortization expense EBITDA 69 91 29 (94) 180 294 $ 375 $ 1,004 Investor Presentation - January 2019 41 44#42Martin Marietta THANK YOU FOR YOUR INTEREST IN MARTIN MARIETTA FOR MORE INFORMATION, PLEASE VISIT MARTINMARIETTA.COM