Investor Presentation - January 2019

STRIVING 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