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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