As of December 2025 Martin Marietta Materials has a market cap of โน3.373 Trillion. This makes Martin Marietta Materials the world's 621th most valuable company by market cap according to our data. The market capitalization, commonly called market cap, is the total market value of a publicly traded company's outstanding shares and is commonly used to measure how much a company is worth.
On Dec 17th, 2025 the market cap of Martin Marietta Materials was reported to be: