Better Health for All

Martin Marietta Materials Inc. has significant negative health externalities from its operations. In 2022, its Mission Valley Rock facility reported toxic releases, including air emissions of Clean Air Act chemicals and known carcinogens

. Additionally, over 500 households near a Houston rock-crushing facility are in proximity to pollutants like particulate matter and nitrogen oxides, which potentially affect respiratory and cardiovascular health . Historically, the company faced a $1.24 million penalty in 1986 for illegal storage, treatment, and disposal of hazardous waste . While the company emphasizes responsible use of natural resources and aims to minimize environmental impact through initiatives to conserve resources, reduce emissions, and preserve wildlife habitats, these efforts appear to be partial remediation for the identified issues . The company's core products, such as aggregates and building materials, have no direct positive or negative health impact, though they indirectly support public health by enabling infrastructure development that can enhance transportation safety and accessibility to healthcare facilities . Most other health-related KPIs are not applicable as the company does not operate in the healthcare sector or offer health-specific products or services.

Fair Money & Economic Opportunity

Martin Marietta Materials Inc. (MLM) is a supplier of aggregates and heavy building materials, not a financial institution. As such, the company does not offer lending, deposit services, or other financial products to consumers. Therefore, KPIs related to underserved client share, pricing fairness, exploitative fee exposure, data accessibility, fair lending compliance, debt burden ratio, geographic inclusion, and product simplicity are not applicable. While MLM engages in community support initiatives in over 400 communities, these efforts are explicitly stated as not directly aligning with financial services or empowering small businesses.

The company's contributions to educational exhibits, such as a $100,000 donation over five years to a geology exhibit, do not constitute financial literacy programs. Its role in infrastructure projects indirectly stimulates local economies and creates jobs, but this is not a direct wealth-building outcome for users of financial products. There is no evidence of profit reinvestment specifically in community finance or profit-sharing with underserved communities.

Fair Pay & Worker Respect

The company's CEO-to-median employee pay ratio was 187:1 in fiscal year ending 2024.

Approximately 12% of the company's employees are represented by a labor union.

Fair Trade & Ethical Sourcing

Martin Marietta reported no specific incidents related to child labor or forced labor in its 2024 GRI Content Index.

The company maintains a zero-tolerance approach to slavery and human trafficking, and its Code of Ethical Business Conduct addresses these risks. Furthermore, Martin Marietta conducts ethical risk assessments of its existing business.

Honest & Fair Business

No specific, quantifiable evidence was found in the provided articles to assess Martin Marietta Materials Inc. against any of the defined KPIs for the 'Honest & Fair Business' value. Information regarding regulatory fines within the past three years, transparency index scores, whistleblower policies, financial restatements, audit coverage, ESG controversy scores, complaint resolution times, board conflict-free percentages, anti-corruption policy details, or third-party verification of ethical claims was not available or sufficiently detailed to map to the scoring rubric

. Past legal challenges from 2012 and 2018 fall outside the relevant three-year timeframe for regulatory fines and do not provide a recognized ESG controversy score.

Kind to Animals

The company, a supplier of aggregates and heavy building materials, does not typically engage in activities related to animal testing, animal-derived ingredients, or animal agriculture. Consequently, no evidence was found in the provided articles to score KPIs such as cruelty-free certification, alternative testing usage, humane certifications, ethical input substitution, supplier audits for welfare, cage-free sourcing, animal testing policy, animal testing volume, innovation investment in animal-free technologies, animal agriculture ethics, animal-free R&D collaboration, or public policy engagement. While the company demonstrates engagement in wildlife conservation through habitat preservation, creation of wetlands, and support for endangered species (e.g., 17% increase in species variety

, preserving 25 acres for bats , constructing land bridges for darters ), the rubric's scoring tiers for 'wildlife_conservation_impact' are quantitatively linked to a percentage of revenue invested, which is not provided in the articles. Therefore, this KPI cannot be scored.

No War, No Weapons

Martin Marietta Materials Inc. primarily focuses on supplying materials for civilian infrastructure projects. The company had a $750,000 contract in 2021 with the U.S. Army Corps of Engineers for rock supply

, and historical contracts totaling approximately $810,199 from 2001 to 2006 for construction material supplies . These contracts represent a negligible portion of the company's revenue. The company has no substantial initiatives directed towards peacebuilding or actively rejecting military associations . Its core business products, such as crushed stone, sand, gravel, cement, and ready-mixed concrete, are not controversial weapons. There is no evidence of defense assets requiring divestment.

Planet-Friendly Business

In 2023, Martin Marietta reported total Scope 1 and 2 carbon emissions of approximately 4,905,000 metric tons of CO₂e.

The company has aligned with the Science Based Targets initiative and aims to achieve net-zero GHG emissions by 2050, with interim targets to reduce Scope 1 CO₂e emissions by 15% and Scope 2 emissions by 30% by 2030. In 2023, 18% of its total energy consumption was sourced from renewables. The company reclaimed 312 acres of land across 87 active quarry sites in 2023, investing $14.3 million in environmental restoration and constructing habitats for wildlife. Additionally, 2.1 million tons of recycled aggregates were processed in 2023. An Ethics, Environment, Safety and Health (EESH) Committee oversees environmental and sustainability matters.

Respect for Cultures & Communities

Martin Marietta Materials has engaged in 5 formal partnerships with local community groups.

These include partnerships with the Boys & Girls Club of Story County, Ronald McDonald House Charities, Duke University Prelaw Fellowship Program, and the North Carolina Museum of Natural Sciences. Additionally, an agreement with Albemarle Corporation to process limestone from the Kings Mountain Mine will see proceeds support local community programs.

Safe & Smart Tech

Martin Marietta Materials has not reported any material cybersecurity incidents for the 2023

and 2024 fiscal years. The company maintains a strong security program with preventative focus, including board oversight via the Audit Committee, quarterly reports from the Senior Vice President, Chief Information Officer, and an Incident Response Leadership Committee. They monitor and test cybersecurity controls and defenses, leveraging third-party technology and expertise. There are no documented incidents of unauthorized data use, supported by integrated data protection and a layered governance framework. The company conducts annual employee cybersecurity training and phishing tests. Users have industry-standard rights over their personal data, such as the right to know, delete, and opt-out of sale or sharing, with a dedicated contact for privacy rights. The company monitors applicable privacy and cybersecurity laws and regulations.

Zero Waste & Sustainable Products

In 2024, Martin Marietta Materials reported a waste diversion rate of approximately 4.7% for solid waste generated at 65% of its operating locations.

The company recorded 17 environmental notices of violation in 2023, which were generally minor and resulted in less than $1,000 in penalties. Martin Marietta has implemented numerous waste reduction initiatives, including using discarded tires as an alternative fuel source, selling fine material for reuse, recycling concrete, and diverting 72,000 tons of synthetic gypsum from landfills in 2023. Other initiatives include replacing quarry trucks with conveyor systems, deploying hybrid wheel loaders that burn 20% less fuel, and a Finish Mill 7 Project estimated to save 4 kWh/ton in power consumption. A wet processing training program also resulted in an estimated 1.4 billion gallons of water use reductions.