EXHIBIT 21

SUBSIDIARIES AS OF DECEMBER31, 2023

Co. ntral Division Logistics, LLC .  C. Smith Companies, LLC C ulcan Concrete, LLC
	State or Other Jurisdiction of Incorporation or Organization		% Owned Directly or Indirectly by Vulcan
A.B. of Sayville, LTD		New York	100
Aggregate & Concrete Testing, LLC		New York	100
Aggregates USA, LLC		Delaware	100
Aggregates USA (Augusta), LLC		Delaware	100
Aggregates USA (Macon), LLC		Delaware	100
Aggregates USA (Savannah), LLC		Delaware	100
Aggregates USA (Sparta), LLC		Delaware	100
Agregados Del Caribe, S.DER.L.DEC.V.		Honduras	100
Agrecasa Holdings, B.V.		Netherlands	100
Alberta Investments, Inc.		Texas	100
Alliance Haulers, Inc.		Texas	100
Arundel Company, LLC		Delaware	100
Atlantic Granite Company, LLC		South Carolina	100
Atlas Redi-Mix, LLC		Texas	100
Atlas-Tuck Concrete, Inc.		Oklahoma	100
Azusa Rock, LLC		Delaware	100
BHM Hangar, LLC		Alabama	83
Black Bear Materials, LTD		British Columbia	100
Black Point Aggregates, Inc.		Nova Scotia	100
Bode Concrete, LLC		California	100
Brooksville Quarry, LLC		Florida	50
BSLH Realty Corp.		New York	100
Calizas Industriales del Carmen, S.A. de C.V.		Mexico	100
CalMat Co.		Delaware	100
Central Concrete Supply Co. Inc.		California	100
Chem-Marine of South Carolina, LLC		South Carolina	100
Coram Materials Corp.		New Jersey	100
Custom-Crete Redi-Mix, LLC		Texas	100
Custom-Crete, LLC		Texas	100
Eagle Rock Aggregates, Inc.		Delaware	100
Florida Rock Industries, Inc.		Florida	100
Freeport Aggregates Limited		Bahamas	100
FRI Bahamas Ltd.		Bahamas	100
Hamburg Quarry Limited Liability Company		New Jersey	100
Harper Brothers, LLC		Delaware	100
Heavy Materials, LLC		U.S. Virgin Islands	100
Heritage Logistics, LLC		Delaware	100
Ingram Concrete, LLC		Texas	100
Legacy Vulcan, LLC		Delaware	100
Maryland Rock Industries, LLC		Delaware	100
Maryland Stone, LLC		Delaware	100
Mideast Division Logistics, LLC		Delaware	100
Miller Place Development, LLC		New York	100
MLFF Realty Corp.		New York	100
Mountain West Logistics, LLC		Delaware	100
New York Sand & Stone, LLC		New York	100
NorCal Materials, Inc.		California	100
North American Recycling and Crushing, LLC		Delaware	100
North Field Extension, LLC		New Jersey	50
NYC Concrete Materials, LLC		Delaware	100
Orca Sand & Gravel Limited Partnership		British Columbia	88
Orca Sand & Gravel Ltd.		British Columbia	88
Outrigger, LLC		Delaware	100
Pebble Lane Associates, LLC		Delaware	100
Polaris Aggregates Inc.		Delaware	100
Polaris Materials ULC		British Columbia	100
Polla Acquisitions, LLC		Delaware	100

Exhibit 21 – Page 1

	State or Other Jurisdiction of Incorporation or Organization		% Owned Directly or Indirectly by Vulcan
Procesadora Del Caribe, LTDA		Honduras	100
Quality Sand & Stone Ltd.		British Columbia	100
R.C. Smith Companies, LLC		Delaware	100
Rancho Piedra Caliza, S.A. de C.V.		Mexico	100
RECO Transportation, LLC		Delaware	100
Redi-Mix, LLC		Texas	100
Right Away Ready Mix Incorporated		California	100
Rock Transport, Inc.		California	100
S & G Concrete Company, LLC		Delaware	100
Salisbury Towing, LLC		Delaware	100
Saturn V Lands, LLC		Delaware	100
Shamrock Building Materials, LLC		Delaware	100
Smith Pre-Cast, Inc.		Delaware	100
Soportes Tecnicos Y Administrativos, S.A. de C.V.		Mexico	100
SOS Timber, LLC		North Carolina	100
Southeast Division Logistics, LLC		Delaware	100
Southern Gulf Coast Division Logistics, LLC		Delaware	100
Southwest Gulf Railroad Company		Texas	95
Spartan Products, LLC		U.S. Virgin Islands	100
Statewide Transport, LLC		Delaware	100
Stone Creek Mira Mesa LLC		California	100
Superior Concrete Materials, Inc.		District of Columbia	100
Syar Concrete, LLC		California	100
Syar Industries, LLC		California	100
TCS Materials, LLC		Delaware	100
Terra Bagnata, LLC		California	50
Triangle Rock Products, LLC		Delaware	100
U.S. Concrete, Inc.		Delaware	100
U.S. Concrete On-Site, Inc.		Delaware	100
USC New York Payroll, LLC		Delaware	100
USC Management Co., LLC		Delaware	100
USC Payroll, Inc.		Delaware	100
USC Technologies, Inc.		Delaware	100
VGCM, B.V.		Netherlands	100
Virginia Concrete Company, LLC		Delaware	100
VMC Vehicle Leasing, LLC		Texas	100
Vulcan Aggregates Company, LLC		Delaware	100
Vulcan Asphalt, LLC		Delaware	100
Vulcan Beaches, LLC		Delaware	100
Vulcan Concrete, LLC		Delaware	100
Vulcan Construction Materials, LLC		Delaware	100
Vulcan Gulf Coast Materials, LLC		North Carolina	100
Vulcan International, B.V.		Netherlands	100
Vulcan Lands, Inc.		New Jersey	100
Vulcan Logistics, LLC		Delaware	100
Vulcan Materials Asphalt and Construction, LLC		Delaware	100
Vulica Shipping Company, Limited		Bahamas	100
WMC IP, Inc.		New Jersey	100
WMC OP, LLC		New Jersey	100
Yardarm, LLC		Delaware	100

Exhibit 21 – Page 2