EXHIBIT 21.01

SUBSIDIARIES OF MARTIN MARIETTA MATERIALS, INC.

AS OF DECEMBER 31, 2024

| Percent
Name of Subsidiary | Owned
2M Lands, LLC, a North Carolina limited liability company | 100%1
Alamo Gulf Coast Railroad Company, a Texas corporation | 99.5%2
Alamo North Texas Railroad Company, a Texas corporation | 99.5%3
Albert Frei & Sons, Inc., a Colorado corporation | 100%4
American Aggregates Corporation, a North Carolina corporation | 100%
American Materials Technologies, LLC, a Tennessee limited liability company | 100%5
American Stone Company, a North Carolina corporation | 50%6
AR & MJ Frei Limited Partnership, a Colorado limited liability partnership | 100%7
Bahama Rock Limited, a Bahamas corporation | 100%
Bluegrass – Blue Mount, LLC, a North Carolina limited liability company | 100%8
Bluegrass Materials Company, LLC, a North Carolina limited liability company | 100%9
Bluegrass-St. Marys, LLC, a North Carolina limited liability company | 100%10
Brookhollow Corporation, a Delaware corporation | 100%11
Campbell’s C-Ment Contracting, Inc., a Colorado corporation | 100%12
CIG MC LLC, a Colorado limited liability company | 100%
Creole Corporation, a Delaware corporation | 100%13
FRI Ready Mix of Tennessee, LLC, a Florida limited liability company | 100%14
Front Range Aggregates LLC, a Delaware limited liability company | 100%
Granite Canyon Quarry, a Wyoming joint venture | 100%15
Harding Street Corporation, a North Carolina corporation | 100%
HSMM LLC, a North Carolina limited liability company | 100%
Kent Sand & Gravel Company, LLC, a North Carolina limited liability company | 100%16
Mardell Trucking Company, Inc., a North Carolina corporation | 100%17
Marlin Acquisition Company 2, Inc., a Delaware corporation | 100%
Martin Marietta ALTN Aggregates, Inc., a Tennessee corporation | 100%18
Martin Marietta ALTN Holding, Inc., a Delaware corporation | 100%19

Martin Marietta Arizona, LLC, a North Carolina limited liability company | 100%20
Martin Marietta Bluegrass, LLC, a North Carolina limited liability company | 100%
Martin Marietta California A&P, LLC, a North Carolina limited liability company | 100%21
Martin Marietta California Ready-Mix, LLC, a Delaware limited liability company | 100%22
Martin Marietta Exchange Entity, LLC, a North Carolina limited liability company | 100%
Martin Marietta Fleet Management LLC, a North Carolina limited liability company | 100%23
Martin Marietta Funding LLC, a Delaware limited liability company | 100%
Martin Marietta Inc., a North Carolina corporation | 100%
Martin Marietta Kansas City, LLC, a Delaware limited liability company | 100%24
Martin Marietta Magnesia Specialties, LLC, a Delaware limited liability company | 100%
Martin Marietta Marine Finance, LLC, a California limited liability company | 100%25
Martin Marietta Marine Operations, LLC, a California limited liability company | 100%26
Martin Marietta Materials Canada Limited, a Nova Scotia, Canada corporation | 100%
Martin Marietta Materials of Missouri, Inc., a North Carolina corporation | 100%
Martin Marietta Materials Real Estate Investments, Inc., a North Carolina corporation | 100%
Martin Marietta Materials Southwest, LLC, a Delaware limited liability company | 100%
Martin Marietta Materials West Division, LLC, a North Carolina limited liability company | 100%
Martin Marietta Northern California Aggregates, LLC, a Delaware limited liability company | 100%27
Martin Marietta North Texas Cement, LLC, a Delaware limited liability company | 100%
Martin Marietta Pacific District Cement LLC, a Delaware limited liability company | 100%28
Martin Marietta San Diego Aggregates LLC, a California limited liability company | 100%29
Martin Marietta Southern California Aggregates, LLC, a Delaware limited liability company | 100%30
Martin Marietta South Texas Cement, LLC, a Delaware limited liability company | 100%
Martin Marietta Texas Ready-Mix, LLC, a Texas limited liability company | 100%31
Martin Marietta Southeast AGG Operations, LLC, a Delaware limited liability company | 100%32
Martin Marietta Southeast Aggregates, Inc., a Delaware corporation | 100%
Martin Marietta Southwest Ready-Mix, Inc., a Delaware corporation | 100%
Martin Marietta Stockton, LLC, a Delaware limited liability company | 100%33
Martin Marietta Transportation and Distribution, LLC, a North Carolina limited liability company | 100%

Material Producers, Inc., an Oklahoma corporation | 100%34
Maryland Materials, Inc., a North Carolina corporation | 100%35
Meridian Aggregates Company, a Limited Partnership, a North Carolina limited partnership | 100%36
Meridian Aggregates Company Northwest, LLC, a North Carolina limited liability company | 100%
Meridian Aggregates Investments, LLC, a North Carolina limited liability company | 100%37
Meridian Granite Company, a North Carolina corporation | 100%38
Mid-State Construction & Materials, Inc., an Arkansas corporation | 100%
Mission Valley Rock Co., LLC, a California limited liability company | 100%39
MMM Mexico I, LLC, a North Carolina limited liability company | 100%40
MMM Mexico, LLC, a North Carolina limited liability company | 100%41
MMMW AGG, LLC, a North Carolina limited liability company | 100%42
MMMW CMT, LLC, a North Carolina limited liability company | 100%43
MTD Pipeline LLC, a Delaware limited liability company | 50%44
Mystic Valley LLC, a Colorado limited liability company | 100%45
Northeast Land and Material Company, Inc., a North Carolina corporation | 100%46
Palmetto Sand Company, Inc., a South Carolina limited liability company | 100%47
Panadero Midco, LLC, a North Carolina limited liability company | 100%48
PCAz Leasing, LLC, an Arizona limited liability company | 100%49
Petrillo Brothers, Inc., a North Carolina corporation | 100%50
Piedras y Arenas Baja, S. de R.L. de C.V., a Mexico limited liability company | 100%51
Powderly Transportation, Inc., a North Carolina corporation | 100%52
R&S Sand & Gravel, LLC, a North Carolina limited liability company | 100%53
Riverside Cement Company, a California general partnership | 100%54
Rock & Rail LLC, a Colorado limited liability company | 100%
Rocky Mountain Materials and Asphalt, Inc., a Colorado corporation | 100%
Rocky Mountain Premix, Inc., a Colorado corporation | 100%
Rocky Mountain Ready Mix Concrete, Inc., a Colorado corporation | 100%55
Royal Gorge Express, LLC, a Colorado Limited Liability Company | 50%56
St. Marys Sand Company, LLC, a North Carolina limited liability company | 100%57

Suburban Acquisition Company, a Colorado corporation | 100%
Theodore Holding, LLC, a Delaware limited liability company | 60.7%58
Tiller Corporation, a North Carolina corporation | 100%
TXI Aviation, Inc. dba TXI Retail, a Texas corporation | 100%59
TXI California, LLC, a Delaware limited liability company | 100%60
TXI Riverside, LLC, a Delaware limited liability company | 100%61
Valley Stone LLC, a Virginia limited liability company | 50%62

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1
2M Lands, LLC is a wholly owned subsidiary of Martin Marietta Materials Real Estate Investments, Inc.
2
Alamo Gulf Coast Railroad Company is owned by Martin Marietta Materials Southwest, LLC, (99.5%) and certain individuals (0.5%).
3
Alamo North Texas Railroad Company is owned by Martin Marietta Materials Southwest, LLC, (99.5%) and certain individuals (0.5%).
4
Albert Frei & Sons, Inc. is a wholly owned subsidiary of AR & MJ Frei Limited Partnership.
5
American Materials Technologies, LLC is a wholly owned subsidiary of Meridian Aggregates Company, a Limited Partnership.
6
Martin Marietta Materials, Inc. owns a 50% interest in American Stone Company.
7
AR & MJ Frei Limited Partnership is owned 98.11% by Rocky Mountain Ready Mix Concrete, Inc. (the Limited Partner). The remaining 1.89% is owned by Campbell’s C-Ment Contracting, Inc. (the General Partner).
8
Bluegrass – Blue Mount, LLC is a wholly owned subsidiary of Bluegrass Materials Company, LLC.
9
Bluegrass Materials Company, LLC is a wholly owned subsidiary of Panadero Midco, LLC.
10
Bluegrass-St. Marys, LLC is a wholly owned subsidiary of Bluegrass Materials Company, LLC.
11
Brookhollow Corporation is a wholly owned subsidiary of Martin Marietta Southwest Ready-Mix, Inc.
12
Campbell’s C-Ment Contracting, Inc. is a wholly owned subsidiary of Suburban Acquisition Company.
13
Creole Corporation is a wholly owned subsidiary of Martin Marietta Southwest Ready-Mix, Inc.
14
FRI Ready Mix of Tennessee, LLC is a wholly owned subsidiary of American Materials Technologies, LLC.
15
Granite Canyon Quarry is owned 51% by Meridian Granite Company and 49% by Martin Marietta Materials Real Estate Investments, Inc.
16
Kent Sand & Gravel Company, LLC is a wholly owned subsidiary of Bluegrass Materials Company, LLC.
17
Mardell Trucking Company, Inc. is owned 50% by Bluegrass Materials Company, LLC and 50% by Petrillo Brothers, Inc.
18
Martin Marietta ALTN Aggregates, Inc. is a wholly owned subsidiary of Martin Marietta ALTN Holdings, Inc.
19
Martin Marietta ALTN Holdings, Inc. is a wholly owned subsidiary of Marlin Acquisition Company 2, Inc.
20
Martin Marietta Arizona, LLC is a wholly owned subsidiary of Martin Marietta Materials West Division, LLC.
21
Martin Marietta California A&P, LLC is a wholly owned subsidiary of Martin Marietta Materials West Division, LLC.
22
Martin Marietta California Ready-Mix, LLC is a wholly owned subsidiary of Martin Marietta Southern California Cement, LLC
23
Martin Marietta Fleet Management LLC, is a wholly owned subsidiary of Martin Marietta Texas Ready-Mix, LLC
24
Martin Marietta Kansas City, LLC is owned 95% by Martin Marietta Materials, Inc. and 5% by Martin Marietta Materials of Missouri, Inc.
25
Martin Marietta Marine Finance, LLC is a wholly owned subsidiary of Martin Marietta Northern California Aggregates, LLC.
26
Martin Marietta Marine Operations, LLC is a wholly owned subsidiary of Martin Marietta Northern California Aggregates, LLC.
27
Martin Marietta Northern California Aggregates, LLC is a wholly owned subsidiary of Martin Marietta Southern California Aggregates, LLC.
28
Martin Marietta Pacific District Cement LLC is a wholly owned subsidiary of MMMW CMT, LLC.
29
Martin Marietta San Diego Aggregates LLC is a wholly owned subsidiary of Martin Marietta Southern California Aggregates, LLC.
30
Martin Marietta Southern California Aggregates, LLC is a wholly owned subsidiary of MMMW AGG, LLC.
31
Martin Marietta Texas Ready-Mix, LLC is a wholly owned subsidiary of Martin Marietta Southwest Ready-Mix, Inc.

32
Martin Marietta Southeast AGG Operations, LLC is a wholly owned subsidiary of Martin Marietta Southeast Aggregates, Inc.
33
Martin Marietta Stockton, LLC is a wholly owned subsidiary of Martin Marietta Southern California Cement, LLC.
34
Material Producers, Inc. is a wholly owned subsidiary of Martin Marietta Materials Southwest, LLC.
35
Maryland Materials, Inc. is owned 50% by Bluegrass Materials Company, LLC and 50% by Petrillo Brothers, Inc.
36
Meridian Aggregates Company, a Limited Partnership, is owned 98% by Meridian Aggregates Investments, LLC. The remaining 2% is owned by Martin Marietta Materials, Inc.
37
Meridian Aggregates Investments, LLC is owned 99% by Martin Marietta Materials, Inc. and 1% by Martin Marietta Materials Real Estate Investments, Inc.
38
Meridian Granite Company is a wholly owned subsidiary of Meridian Aggregates Company, a Limited Partnership.
39
Mission Valley Rock Co., LLC is a wholly owned subsidiary of Martin Marietta Northern California Aggregates, LLC.
40
MMM Mexico I, LLC is a wholly owned subsidiary of Martin Marietta Materials West Division, LLC.
41
MMM Mexico, LLC is a wholly owned subsidiary of Martin Marietta Materials West Division, LLC.
42
MMMW AGG, LLC is a wholly owned subsidiary of Martin Marietta Materials West Division, LLC.
43
MMMW CMT, LLC is a wholly owned subsidiary of Martin Marietta Materials West Division, LLC.
44
Martin Marietta Magnesia Specialties, LLC, a wholly owned subsidiary of Martin Marietta Materials, Inc., owns a 50% interest in MTD Pipeline LLC.
45
Mystic Valley LLC is a wholly owned subsidiary of AR & MJ Frei Limited Partnership.
46
Northeast Land and Material Company, Inc. is a wholly owned subsidiary of Maryland Materials, Inc.
47
Palmetto Sand Company Inc. is a wholly owned subsidiary of Martin Marietta Southeast AGG Operations, LLC.
48
Panadero Midco, LLC is a wholly owned subsidiary of Martin Marietta Bluegrass, LLC.
49
PCAz Leasing, LLC is a wholly owned subsidiary of Martin Marietta Arizona, LLC.
50
Petrillo Brothers, Inc. is a wholly owned subsidiary of Bluegrass Materials Company, LLC.
51
Piedras y Arenas Baja, S. De R.L. de C.V. is owned 99.9999% by MMM Mexico, LLC and 0.0001% by MMM Mexico I, LLC.
52
Powderly Transportation, Inc. is a wholly owned subsidiary of Meridian Aggregates Company, a Limited Partnership.
53
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.
54
Riverside Cement Company is owned 49% by TXI California, LLC. and 51% by TXI Riverside LLC
55
Rocky Mountain Ready Mix Concrete, Inc. is a wholly owned subsidiary of Campbell’s C-Ment Contracting, Inc.
56
Rock & Rail LLC, a wholly owned subsidiary of Martin Marietta Materials, Inc., owns a 50% interest in Royal Gorge Express, LLC
57
St. Marys Sand Company, LLC is a wholly owned subsidiary of Bluegrass-St. Marys, LLC.
58
Martin Marietta Materials, Inc. is the manager of and owns a 60.7% interest in Theodore Holdings, LLC.
59
TXI Aviation, Inc. is a wholly owned subsidiary of Martin Marietta Southwest Ready-Mix, Inc.
60
TXI California, LLC is a wholly owned subsidiary of Martin Marietta Southwest Ready-Mix, Inc.
61
TXI Riverside, LLC is a wholly owned subsidiary of Martin Marietta Southwest Ready-Mix, Inc.
62
Martin Marietta Materials, Inc. is the manager of and owns a 50% interest in Valley Stone LLC.