EXHIBIT 21.01

SUBSIDIARIES OF MARTIN MARIETTA MATERIALS, INC.

AS OF JANUARY 31, 2022

	Percent
Name of Subsidiary	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 North Carolina corporation	100%
American Materials Technologies, LLC, a Tennessee limited liability company	100%3
American Stone Company, a North Carolina corporation	50%4
Bahama Rock Limited, a Bahamas corporation	100%
Bluegrass – Blue Mount, LLC, a North Carolina limited liability company	100%5
Bluegrass Materials Company, LLC, a North Carolina limited liability company	100%6
Bluegrass-St. Marys, LLC, a North Carolina limited liability company	100%7
Brookhollow of Alexandria, Inc., a Louisiana corporation	100%8
Brookhollow Corporation, a Delaware corporation	100%9
Brook Hollow Properties, Inc., a Texas corporation	100%10
Calaveras Materials, LLC, a California limited liability company	100%11
California Natural Aggregates, Inc., a California corporation	100%12

¹  Alamo Gulf Coast Railroad Company is owned by Martin Marietta Materials Southwest, LLC, (99.5%) and certain individuals (0.5%).

²  Alamo North Texas Railroad Company is owned by Martin Marietta Materials Southwest, LLC, (99.5%) and certain individuals (0.5%).

³  American Materials Technologies, LLC is a wholly owned subsidiary of Meridian Aggregates Company, a Limited Partnership.

⁴  Martin Marietta Materials, Inc. owns a 50% interest in American Stone Company.

⁵  Bluegrass – Blue Mount, LLC is a wholly owned subsidiary of Bluegrass Materials Company, LLC.

⁶  Bluegrass Materials Company, LLC is a wholly owned subsidiary of Panadero Midco, LLC.

⁷  Bluegrass-St. Marys, LLC is a wholly owned subsidiary of Bluegrass Materials Company, LLC.

⁸  Brookhollow of Alexandria, Inc. is a wholly owned subsidiary of Brookhollow Corporation.

⁹  Brookhollow Corporation is a wholly owned subsidiary of Texas Industries, Inc.

¹⁰  Brook Hollow Properties, Inc. is a wholly owned subsidiary of Brookhollow Corporation.

¹¹  Calaveras Materials, LLC is a wholly owned subsidiary of Thunder Cement LLC

¹²  California Natural Aggregates, Inc. is a wholly owned subsidiary of Texas Industries, Inc.

Campbell’s C-Ment Contracting, Inc., a Colorado corporation	100%13
CIG MC LLC, a Colorado limited liability company	100%
Creole Corporation, a Delaware corporation	100%14
FRI Ready Mix of Tennessee, LLC, a Florida limited liability company	100%15
Front Range Aggregates LLC, a Delaware limited liability company	100%
Granite Canyon Quarry, a Wyoming joint venture	100%16
Hanson Aggregates LLC, a Delaware limited liability company	100%17
Hanson Aggregates Mid-Pacific, LLC, a Delaware limited liability company	100%18
Hanson Aggregates Pacific Southwest LLC, a California limited liability company	100%19
Hanson Marine Finance, LLC, a California limited liability company	100%20
Hanson Marine Operations, LLC, a California limited liability company	100%21
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%22
Lehigh Cement West, LLC, a California limited liability company	100%23
Mardell Trucking Company, Inc., a North Carolina corporation	100%24
Martin Marietta Bluegrass, LLC, a North Carolina limited liability company	100%25

¹³  Campbell’s C-Ment Contracting, Inc. is a wholly-owned subsidiary of Suburban Acquisition Company.

¹⁴  Creole Corporation is a wholly owned subsidiary of Texas Industries, Inc.

¹⁵    FRI Ready Mix of Tennessee, LLC is a wholly owned subsidiary of American Materials Technologies, LLC.

¹⁶  Granite Canyon Quarry is owned 51% by Meridian Granite Company and 49% by Martin Marietta Materials Real Estate Investments, Inc.

¹⁷  Hanson Aggregates LLC is a wholly owned subsidiary of MMMW AGG, LLC.

¹⁸  Hanson Aggregates Mid-Pacific, LLC is a wholly owned subsidiary of Hanson Aggregates LLC.

¹⁹  Hanson Aggregates Pacific Southwest LLC is a wholly owned subsidiary of Hanson Aggregates LLC.

²⁰  Hanson Marine Finance, LLC is a wholly owned subsidiary of Hanson Aggregates Mid-Pacific, LLC.

²¹  Hanson Marine Operations, LLC is a wholly owned subsidiary of Hanson Aggregates Mid-Pacific, LLC.

²²  Kent Sand & Gravel Company, LLC is a wholly owned subsidiary of Bluegrass Materials Company, LLC.

²³  Lehigh Cement West, LLC is a wholly owned subsidiary of Thunder Cement LLC.

²⁴  Mardell Trucking Company, Inc. is owned 50% by Bluegrass Materials Company, LLC and 50% by Petrillo Brothers, Inc.

²⁵  Martin Marietta Bluegrass, LLC is owned 61.62% by Panadero Corp. and 38.38% by Martin Marietta Materials, Inc.

Martin Marietta Composites, Inc., a Delaware corporation	100%
Martin Marietta Fleet Management LLC, a North Carolina limited liability company	100%26
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%27
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 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 Texas limited liability company	100%28
Martin Marietta Materials West Division, LLC, a North Carolina limited liability company	100%
Martin Marietta Transportation and Distribution, LLC	100%
Material Producers, Inc., an Oklahoma corporation	100%29
Maryland Materials, Inc., a North Carolina corporation	100%30
Meridian Aggregates Company, a Limited Partnership, a North Carolina limited partnership	100%31
Meridian Aggregates Company Northwest, LLC, a North Carolina limited liability company	100%
Meridian Aggregates Company Southwest, LLC, a North Carolina limited liability company	100%32
Meridian Aggregates Investments, LLC, a North Carolina limited liability company	100%33
Meridian Granite Company, a North Carolina corporation	100%34
Mid-State Construction & Materials, Inc., an Arkansas corporation	100%
Mission Valley Rock Co., LLC, a California limited liability company	100%35
MMM Mexico I, LLC, a North Carolina limited liability company	100%36
MMM Mexico, LLC, a North Carolina limited liability company	100%37
MMMMW A&P, LLC, a North Carolina limited liability company	100%38
MMMW AGG, LLC, a North Carolina limited liability company	100%39
MMMW AZ RMX, LLC, a North Carolina limited liability company	100%40
MMMW CMT, LLC, a North Carolina limited liability company	100%41
MTD Pipeline LLC, a Delaware limited liability company	50%42
North East Land and Material Company, Inc., a North Carolina corporation	100%43
Panadero Corp., a North Carolina corporation	100%
Panadero Midco, LLC, a North Carolina limited liability company	100%44
Partin Limestone Products, Inc., a California corporation	100%45
PCAz Leasing, LLC, an Arizona limited liability company	100%46
Petrillo Brothers, Inc., a North Carolina corporation	100%47
Piedras y Arenas Baja, S. de R.L. de C.V., a Mexican limited liability company	100%48
Powderly Transportation, Inc., a North Carolina corporation	100%49
R&S Sand & Gravel, LLC, a North Carolina limited liability company	100%50
Ratliff Mix Management, LLC, a Texas limited liability company	100%51
Ratliff Ready‑Mix, LP, a Texas limited partnership	100%52
Riverside Cement Company, a California partnership	100%53
Riverside Cement Holdings Company, a Delaware corporation	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
South Valley Materials, LLC, a California limited liability company	100%57
Southwestern Financial Corporation, a Texas Corporation	100%58
St. Marys Sand Company, LLC, a North Carolina limited liability company	100%59
Suburban Acquisition Company, a Colorado corporation	100%
Texas Industries Holdings, LLC, a Delaware limited liability company	100%60

²⁶  Martin Marietta Fleet Management LLC, is a wholly owned subsidiary of Martin Marietta Materials Southwest, LLC

²⁷  Martin Marietta Kansas City, LLC is owned 95% by Martin Marietta Materials, Inc. and 5% by Martin Marietta Materials of Missouri, Inc.

²⁸  Martin Marietta Materials Southwest, LLC is a wholly owned subsidiary of Texas Industries, Inc.

²⁹  Material Producers, Inc. is a wholly owned subsidiary of Martin Marietta Materials Southwest, LLC.

³⁰  Maryland Materials, Inc. is owned 50% by Bluegrass Materials Company, LLC and 50% by Petrillo Brothers, Inc.

³¹  Meridian Aggregates Company, a Limited Partnership, is owned 98% by Meridian Aggregates Investments, LLC.  The remaining 2% is owned by Martin Marietta Materials, Inc.

³²  Martin Marietta Materials Southwest, LLC is the sole member of Meridian Aggregates Company Southwest, LLC.

³³  Meridian Aggregates Investments, LLC is owned 99% by Martin Marietta Materials, Inc. and 1% by Martin Marietta Materials Real Estate Investments, Inc.

³⁴  Meridian Granite Company is a wholly owned subsidiary of Meridian Aggregates Company, a Limited Partnership.

³⁵  Mission Valley Rock Co., LLC is a wholly owned subsidiary of Hanson Aggregates Mid-Pacific, LLC.

³⁶  MMM Mexico I, LLC is a wholly owned subsidiary of Martin Marietta Materials West Division, LLC.

³⁷  MMM Mexico, LLC is a wholly owned subsidiary of Martin Marietta Materials West Division, LLC.

³⁸  MMMMW A&P, LLC is a wholly owned subsidiary of Martin Marietta Materials West Division, LLC.

³⁹  MMMW AGG, LLC is a wholly owned subsidiary of Martin Marietta Materials West Division, LLC.

⁴⁰  MMMW AZ RMX, LLC is a wholly owned subsidiary of Martin Marietta Materials West Division, LLC.

⁴¹  MMMW CMT, LLC is a wholly owned subsidiary of Martin Marietta Materials West Division, LLC.

⁴²  Martin Marietta Magnesia Specialties, LLC, a wholly owned subsidiary of Martin Marietta Materials, Inc., owns a 50% interest in MTD Pipeline LLC.

⁴³  North East Land and Material Company, Inc. is a wholly owned subsidiary of Maryland Materials, Inc.

⁴⁴  Panadero Midco, LLC is a wholly owned subsidiary of Martin Marietta Bluegrass, LLC.

⁴⁵  Partin Limestone Products, Inc. is a wholly owned subsidiary of Riverside Cement Company.

⁴⁶  PCAz Leasing, LLC is a wholly owned subsidiary of Hanson Aggregates LLC.

⁴⁷  Petrillo Brothers, Inc. is a wholly owned subsidiary of Bluegrass Materials Company, LLC.

⁴⁸  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.

⁴⁹  Powderly Transportation, Inc. is a wholly owned subsidiary of Meridian Aggregates Company, a Limited Partnership.

⁵⁰  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.

⁵¹  Ratliff Mix Management, LLC is a wholly owned subsidiary of TXI Operations, LP.

⁵²  Ratliff Ready-Mix, LP is owned 99% by TXI Operations, LP and 1% by Ratliff Mix Management, LLC.

⁵³  Riverside Cement Company is owned 49% by TXI California, Inc. and 51% by TXI Riverside Inc.

⁵⁴  Riverside Cement Holdings Company is a wholly owned subsidiary of Riverside Cement Company.

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  South Valley Materials, LLC is a wholly owned subsidiary of Thunder Cement LLC.

⁵⁸  Southwestern Financial Corporation is a wholly owned subsidiary of TXI Operations, LP.

⁵⁹  St. Marys Sand Company, LLC is a wholly owned subsidiary of Bluegrass-St. Marys, LLC.

⁶⁰  Texas Industries Holdings, LLC is a wholly owned subsidiary of Texas Industries, Inc.

Texas Industries, Inc., a Delaware corporation	100%
Texas Industries Trust, a Delaware trust	100%61
Theodore Holding, LLC, a Delaware limited liability company	60.7%62
Thunder Cement LLC, a Delaware limited liability company	100%63
Tiller Corporation, a North Carolina corporation	100%
Two Rivers Cement LLC, a Delaware limited liability company	50%64
TXI Aviation, Inc. dba TXI Retail, a Texas corporation	100%65
TXI California, LLC, a Delaware limited liability company	100%66
TXI Cement Company, a Delaware corporation	100%67
TXI LLC, a Delaware limited liability company	100%68
TXI Operating Trust, a Delaware trust	100%69
TXI Operations, LP, a Delaware limited partnership	100%70
TXI Power Company, a Texas corporation	100%71
TXI Riverside, LLC, a Delaware limited liability company	100%72
TXI Transportation Company, a Texas corporation	100%73
Valley Stone LLC, a Virginia limited liability company	50%74

⁶¹  Texas Industries Trust is owned 100% by Texas Industries Holdings, LLC.

⁶²  Martin Marietta Materials, Inc. is the manager of and owns a 60.7% interest in Theodore Holdings, LLC.

⁶³  Thunder Cement LLC is a wholly owned subsidiary of MMMW CMT, LLC.

⁶⁴  MMMW CMT, LLC, a wholly owned subsidiary of Martin Marietta Materials, Inc., owns a 50% ownership interest in Two Rivers Cement LLC.

⁶⁵  TXI Aviation, Inc. is a wholly owned subsidiary of Texas Industries, Inc.

⁶⁶  TXI California, LLC is a wholly owned subsidiary of Texas Industries, Inc.

⁶⁷  TXI Cement Company is a wholly owned subsidiary of Texas Industries, Inc.

⁶⁸  TXI, LLC is a wholly owned subsidiary of Texas Industries, Inc.

⁶⁹  TXI Operating Trust is owned 100% by TXI LLC.

⁷⁰  TXI Operations, LP is owned 99% by Texas Industries Trust and owned 1% by TXI Operating Trust.

⁷¹  TXI Power Company is a wholly owned subsidiary of Texas Industries, Inc.

⁷²  TXI Riverside, LLC is a wholly owned subsidiary of Texas Industries, Inc.

⁷³  TXI Transportation Company is a wholly owned subsidiary of Texas Industries, Inc.

⁷⁴  Martin Marietta Materials, Inc. is the manager of and owns a 50% interest in Valley Stone LLC.