Page 4 - 2023 Sustainability Report

CEO Letter

Sustainability Priorities

Martin Marietta has a proactive, responsible, and principled approach to climate change, including setting targets and
keeping promises. We believe these strategies and risk-mitigation efforts are robust to address the Company’s climate
risks and benefit from climate-related opportunities. We continue to enhance our disclosure on these matters and our
engagement with shareholders to more fully explain the Company’s priorities in these important areas. In addition to our
year-round dialogue with our shareholders on a variety of topics, in the fall of 2023 we undertook a Fall Engagement
Program. This included contacting many of our shareholders, including our top 40 shareholders, to discuss feedback we
received during the year on climate matters and our compensation program design.
We made substantial progress on our sustainability journey in the last year. Among other things, during 2023:

• We established our ambition to be net zero by 2050 across our entire value chain.
• We submitted our commitment letter to the Science Based Targets initiative (SBTi) and have started gathering Scope 3
emissions data for purposes evaluating those emissions against SBTi’s target threshold in accordance with SBTi procedures.
• We submitted additional responses and information to Climate Action 100+ including our net zero GHG emissions
ambition by 2050, a long-term GHG reduction target, and a comprehensive roadmap to decarbonization.
• We submitted responses to the CDP Climate and Water surveys scoring a C on both and setting a baseline for future
improvements.
• We engaged with Sustainalytics to update the climate information regarding the Company.
• We designed a new Political Contributions and Lobbying web page responsive to the CPA-Zicklin scorecard resulting in
a 77.1 point increase in our CPA-Zicklin scores from a 10.0 in 2022 to an 87.1 in 2023, which is in the index’s top
quartile. In addition, the Company was recognized by CPA-Zicklin as one of the nine Most Improved Companies This
Year.
• We progressed on our activities relating to several employee resource groups (ERGs), including our Women Who Build
resource group, a Military & Veterans Community and a multicultural ERG called MERGE.

Governance and Board Refreshment
Martin Marietta is committed to strong corporate governance and ensuring a diverse set of skills and backgrounds on the
Board of Directors. At the Company’s 2024 Annual Meeting of Shareholders, Michael J. Quillen, who has served on
Martin Marietta’s Board of Directors since 2008, will retire. Mr. Quillen has been a superb and insightful member of our
Board; we are extremely grateful for his steady guidance and thoughtful leadership throughout his Board tenure. He
previously served as Lead Independent Director and, most recently, as Chair of our Finance Committee. We wish him well
in retirement. Over the past nine years, we have added seven new independent directors, and we are nominating Mary T.
Mack, a former Senior Executive Vice President at Wells Fargo & Company with a broad mix of banking, finance and
governance experience, to serve on our Board. Half of our independent Board nominees are diverse, including four
women, one African American director and one Hispanic director, each of whom brings strong backgrounds and
experience with publicly-traded companies and adds unique insights to our Board.
Our senior management team and I engage personally and continuously with our stakeholders to listen carefully and
share thoughts regarding sustainability and other ESG 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 2023
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

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