EXHIBIT 21.01

SUBSIDIARIES OF MARTIN MARIETTA MATERIALS, INC.
AS OF FEBRUARY 21, 2006

Name of Subsidiary	Percent Owned
Alamo Gulf Coast Railroad Company, a Texas corporation		99.5	%1
Alamo North Texas Railroad Company, a Texas corporation		99.5	%2
American Aggregates Corporation, a Delaware corporation		100	%
American Stone Company, a North Carolina corporation		50	%3
Bahama Rock Limited, a Bahamas corporation		100	%
Central Rock Company, a North Carolina corporation		100	%
City Wide Rock & Excavating Co., a Nebraska corporation		100	%
Fredonia Valley Railroad, Inc., a Delaware corporation		100	%
Granite Canyon Quarry, a Wyoming joint venture		51	%4
Harding Street Corporation, a Delaware corporation		100	%
Hunt Martin Materials, LLC, a Delaware limited liability company		50	%5
J.W. Jones Materials, LLC, a Delaware limited liability company		99	%6
Martin Marietta Composites, Inc., a Delaware corporation		100	%

1	Alamo Gulf Coast Railroad Company is owned by Martin Marietta Materials Southwest, Ltd. (99.5%) and certain individuals (0.5%).
2	Alamo North Texas Railroad Company is owned by Martin Marietta Materials Southwest, Ltd. (99.5%) and certain individuals (0.5%).
3	Central Rock Company, a wholly owned subsidiary of Martin Marietta Materials, Inc., owns a 50% interest in American Stone Company.
4	Meridian Granite Company, an indirect wholly owned subsidiary of Martin Marietta Materials, Inc., owns a 51% interest in Granite Canyon Quarry.
5	Hunt Martin Materials, LLC is owned 45% by Martin Marietta Materials, Inc. and 5% by Martin Marietta Materials of Missouri, Inc., a wholly owned subsidiary of Martin Marietta Materials, Inc.
6	Martin Marietta Materials, Inc. owns a 99% interest in J.W. Jones Materials, LLC.

Name of Subsidiary	Percent Owned
Martin Marietta Employee Relief Foundation, a Delaware Not for Profit corporation		100	%
Martin Marietta Equipment Company, Inc., a Delaware corporation		100	%
Martin Marietta Equipment Leasing, LLC, a Delaware limited liability company		100	%7
Martin Marietta Magnesia Specialties, LLC, a Delaware limited liability company		100	%
Martin Marietta Materials Canada Limited, a Nova Scotia, Canada corporation		100	%
Martin Marietta Materials of Alabama, LLC, a Delaware limited liability company		100	%8
Martin Marietta Materials of Florida, LLC, a Delaware limited liability company		100	%
Martin Marietta Materials of Louisiana, Inc., a Delaware corporation		100	%
Martin Marietta Materials of Missouri, Inc., a Delaware corporation		100	%
Martin Marietta Materials Real Estate Investments, Inc., a Delaware corporation		100	%
Martin Marietta Materials Southwest, Ltd., a Texas limited partnership		100	%9
Material Producers, Inc., an Oklahoma corporation		100	%10
Meridian Aggregates Company, a Limited Partnership, a Delaware limited partnership		100	%11
Meridian Aggregates Company Northwest, LLC, a Delaware limited liability company		100	%12
Meridian Aggregates Company Southwest, LLC, a Delaware limited liability		100	%13
Meridian Aggregates Investments, LLC, a Delaware limited liability company		100	%14

7	Martin Marietta Equipment Leasing, LLC is owned 99% by Martin Marietta Materials, Inc. The remaining 1% is owned by Martin Marietta Equipment Company, Inc.
8	Martin Marietta Materials of Alabama, LLC is a wholly owned subsidiary of American Aggregates Corporation.
9	Martin Marietta Materials Southwest, Ltd. is owned 2% by Southwest I, LLC and 98% by Southwest II, LLC.
10	Material Producers, Inc. is a wholly owned subsidiary of Martin Marietta Materials Southwest, Ltd.
11	Meridian Aggregates Company, a Limited Partnership is owned 98% by Meridian Aggregates Investments, LLC. The remaining 2% is owned by Martin Marietta Materials, Inc.
12	Martin Marietta Materials, Inc. is the sole member of Meridian Aggregates Company Northwest, LLC.
13	Martin Marietta Materials Southwest, Ltd. is the sole member of Meridian Aggregates Company Southwest, LLC.
14	Meridian Aggregates Investments, LLC is owned 99% by Martin Marietta Materials, Inc. and 1% by Martin Marietta Materials Real Estate Investments, Inc.

Name of Subsidiary	Percent Owned
Meridian Granite Company, a Delaware corporation		100	%15
Mid South-Weaver Joint Venture, a North Carolina joint venture		50	%16
Mid-State Construction & Materials, Inc., an Arkansas corporation		100	%
MTD Pipeline LLC, a Delaware limited liability company		50	%17
Norman Asphalt Co., an Oklahoma corporation		100	%18
Powderly Transportation, Inc., a Delaware corporation		100	%19
R&S Sand & Gravel, LLC, a Delaware limited liability company		100	%20
Rocky Ridge, Inc., a Nevada corporation		100	%
Sha-Neva, LLC, a Nevada limited liability company		100	%
Southwest I, LLC, a Delaware limited liability company		100	%
Southwest II, LLC, a Delaware limited liability company		100	%
Superior Stone Company, a North Carolina corporation		100	%
Theodore Holding, LLC, a Delaware limited liability company		60.7	%21
Valley Stone LLC, a Virginia limited liability company		50	%22
Wycliff Holding, LLC, a North Carolina limited liability company		100	%

15	Meridian Granite Company is a wholly owned subsidiary of Meridian Aggregates Company, a Limited Partnership.
16	Mid South-Weaver Joint Venture is owned 50% by Central Rock Company.
17	Martin Marietta Magnesia Specialties, LLC, a wholly owned subsidiary of Martin Marietta Materials, Inc., owns a 50% interest in MTD Pipeline LLC.
18	Norman Asphalt Co. is a wholly owned subsidiary of Martin Marietta Materials Southwest, Ltd.
19	Powderly Transportation, Inc. is a wholly owned subsidiary of Meridian Aggregates Company, a Limited Partnership.
20	Martin Marietta Materials, Inc. is the manager of and owns a 90% interest in R&S Sand & Gravel, LLC. The other 10% is owned by Harding Street Corporation, a wholly owned subsidiary of Martin Marietta Materials, Inc.
21	Superior Stone Company, a wholly owned subsidiary of Martin Marietta Materials, Inc., is the manager of and owns a 60.7% interest in Theodore Holding, LLC.
22	Martin Marietta Materials, Inc. is the manager of and owns a 50% interest in Valley Stone LLC.