0000916076 2026-06-29 2026-06-29 false 0000916076 8-K 8-K 2026-06-29 Martin Marietta Materials, Inc. Martin Marietta Materials, Inc. NC NC 1-12744 1-12744 56-1848578 56-1848578 4123 Parklake Avenue 4123 Parklake Avenue Raleigh Raleigh NC NC 27612 27612 919 919 781-4550 781-4550 false false false false false false false false Common Stock, $0.01 par value per share Common Stock, $0.01 par value per share MLM MLM NYSE NYSE false false