Page 5 - Martin Marietta - 2024 Sustainability Report

CEO Letter

• We continued our work during 2024 to reach our 2030 goals for Scope 1 reductions through efficiency projects such as
our $135 million Finish Mill 7 Project at our Midlothian, Texas Cement Plant, additional equipment optimization and the
production of Portland Limestone Cement (PLC) or Type 1L in Texas which contributed to a further reduction in both
actual emissions and intensity in the Scope 1 GHG footprint of our cement business.
• We continued to reduce our Scope 2 emissions, including through renewable energy credits (RECs) purchased in 2024.
• In 2024, we also brought the three wind turbines constructed in 2023 at our Woodville, Ohio plant online in April. These
turbines generated renewable energy that met a significant portion of the Woodville Quarry’s electrical energy need.
• We continue to participate in the recycled aggregates market following the acquisitions of recycling assets in Texas,
California and Minnesota in recent years. We processed and shipped approximately 4 million tons of concrete and
asphalt generated from various construction and demolition projects in 2024.
• We continued our review of potential technical solutions relating to GHG controls, product improvements and alternate
fuels in 2024; these include carbon capture, artificial intelligence and co-location of green hydrogen production.

• We responded to multiple stakeholder sustainability questionnaires in 2024, including CDP, SBTi, ISS, CPA-Zicklin, Great
®
Place to Work and Sustainalytics. In addition, we reviewed surveys and data collection from Climate Action 100+ and
MSCI.
• In response to shareholder requests, we completed our first internal water use survey to allow us to develop
appropriate and relevant data relating to our water usage and the impact on our communities.
• In response to the sale of our Hunter Cement Plant, we have increased our 2030 cement intensity reduction Target
from a 15% to 23% reduction over the 2010 baseline for our remaining cement location.
Our Pursuit of Excellence

We are proud to include the accomplishments of our 2024 Diamond Elite Award winner in this report. As you will see,
our Ames Mine in Iowa is an underground limestone mine that has been in operation since 1982. Its 110 employees
worked over 2.7 million hours, or 4,900 days, with ZERO lost-time incidents while providing millions of tons of aggregates
annually to its customers. As the operator of the largest number of underground aggregates mines, we welcome the
opportunity to highlight the achievements of Ames Mine, as well as the benefits of underground mining. These include
bringing critical materials closer to our customers, while maintaining a smaller environmental footprint than surface
mining and preserving the landscape by minimizing surface disruption. The cover of this Sustainability Report features the
surface of our Ames Mine, while our 2024 Annual Report and recently published Proxy Statement showcase our
underground operations at Ames Mine on their covers.

Our senior management team and I engage personally and continuously with our stakeholders to listen carefully and
share thoughts regarding sustainability, business strategy, health and safety and other considerations; the important
feedback we receive on these issues helps inform our policies, practices and disclosures. We believe the steps we have
taken to date, and those we will continue to take in the future, make us a leader in the aggregates sector. We are proud
to present you with our 2024 Sustainability Report and look forward to continuing to report our commitment, shared
purpose and strategy to building a more sustainable world.

Sincerely,

C. Howard Nye
Chair, President and
Chief Executive Officer

MARTIN MARIETTA 3