KNF · Annual Report (Form 10-K) · Filed February 20, 2026

Knife River Corp — 10-K exhibit

a2025ex21.htm

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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

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