1 EXHIBIT 21.01 SUBSIDIARIES OF MARTIN MARIETTA MATERIALS, INC. AS OF MARCH 10, 1997 NAME OF SUBSIDIARY PERCENT OWNED ------------------ ------------- American Stone Company, a North Carolina corporation 50%* Bahama Rock Limited, a Bahamas corporation 100% Bayou Mining, Inc., a Louisiana corporation 100% Central Rock Company, a North Carolina corporation 100% Kaser Corporation, an Iowa corporation 50% Martin Marietta Magnesia Specialties Inc., a Delaware corporation 100% Martin Marietta Materials Canada Limited, a 100% Nova Scotia, Canada corporation Martin Marietta Materials de Mexico, S.A. de C.V., a Mexican corporation 100%** - ------------------ * Central Rock Company, a wholly-owned subsidiary of the Company, owns a 50% interest in American Stone Company. ** Martin Marietta Materials de Mexico, S.A. de C.V. is owned by Martin Marietta Magnesia Specialties Inc. (99%) and Martin Marietta Materials, Inc. (1%) 29