0000916076 2026-04-30 2026-04-30 0000916076 false 8-K 2026-04-30 MARTIN MARIETTA MATERIALS, INC. NC 1-12744 56-1848578 4123 Parklake Avenue Raleigh NC 27612 919 781-4550 false false false false Common Stock, $.01 par value per share MLM NYSE false