MLM vs HEI Comparison

Martin Marietta Materials is one of the United States' largest producer of construction aggregates (crushed stone, sand, and gravel). In 2024, Martin Marietta sold 191 million tons of aggregates. Martin Marietta's most important markets include Texas, Colorado, North Carolina, Georgia, and Florida, accounting for most of its sales. The company also produces cement in Texas and uses its aggregates in its asphalt and ready-mixed concrete businesses. Martin's magnesia specialties business produces magnesia-based chemical products and dolomitic lime.

Heico is an aerospace and defense supplier that focuses on creating niche replacement parts for commercial aircraft and components for defense products. In commercial aerospace, Heico is the largest independent producer of replacement aircraft parts, primarily for engines. In the defense market, the company produces niche subcomponents used in targeting technology as well as simulation equipment, among other things. It operates as two segments: the flight support group,or FSG, and the electronic technologies group, or ETG, both of which supply the aerospace and defense sectors to different degrees. The company is highly acquisitive, focusing on companies in similar or adjacent markets that are generating strong cash flow with the potential for growth.