EX-21.1 5 a2025ex21.htm KNIFE RIVER CORPORATION LIST OF SUBSIDIARIES
Knife River Corporation
List of Subsidiaries
(effective December 31, 2025)

Subsidiaries | Jurisdiction of Formation
Alaska Basic Industries, Inc. | Alaska
Albina Asphalt, LLC | Delaware
Anchorage Sand and Gravel Company, Inc. | Alaska
ARC Fabricators, L.L.C. | South Dakota
Baldwin Contracting Company, Inc. | California
Bearcat Transportation, LLC | Delaware
Central Oregon Redi-Mix, LLC | Oregon
Concrete, Inc. | California
Connolly-Pacific Co. | California
D S S Company | California
Ellis & Eastern Company | South Dakota
Fairbanks Materials, Inc. | Alaska
Glacier Resources, LLC | Delaware
Granite City Ready Mix, Inc. | Minnesota
Hawaiian Cement | Hawaii
Jebro Incorporated | Iowa
JTL Group, Inc. (Montana Corporation) | Montana
JTL Group, Inc. (Wyoming Corporation) | Wyoming
Kent's Oil Service | California
Knife River BenefitCo, LLC | Delaware
Knife River Corporation - Mountain West | Delaware
Knife River Corporation - North Central | Minnesota
Knife River Corporation - Northwest | Oregon
Knife River Corporation - South | Texas
Knife River Dakota, Inc. | Delaware
Knife River Hawaii, Inc. | Delaware
Knife River Marine, Inc. | Delaware
Knife River Midwest, LLC | Delaware
Knife River Prestress, Inc. | Delaware
Kraemer Trucking & Excavating, LLC | Delaware
KRC Holdings, Inc. | Delaware
KRC Materials, Inc. | Delaware
LTM, Incorporated | Oregon
Northern Sand & Gravel, Inc. | North Dakota
Northstar Materials, Inc. | Minnesota
Oregon Asphaltic Paving, LLC | Oregon
Rail to Road, Inc. | South Dakota
Rogers Northwest, Inc. | Oregon
Spring Creek Insurance Company | Utah
Strata Corporation | North Dakota
Sweetman Const. Co. | South Dakota
Tigard Sand & Gravel, LLC | Oregon
WHC, Ltd. | Hawaii