EX-21.1 6 a2025q410kexhibit211.htm EX-21.1

Exhibit 21.1

Subsidiaries of NPK International Inc.

December 31, 2025

1			DBM SERVICIOS, S.A. de C.V.
2			DURA-BASE DE MEXICO S.A. DE C.V.
3			DURA-BASE NEVADA, INC.
4			GRASSFORM PLANT HIRE LIMITED
5			NEWPARK CHILE LIMITADA
6			NPK BRASIL LTDA
7			NPK TEXAS LLC
8			NPK ACCESS SOLUTIONS LLC
9			NPK ACCESS SOLUTIONS (UK) LLC
10			NPK ENVIRONMENTAL WATER SOLUTIONS LLC
11			NPK HOLDINGS LLC
12			NPK INTERNATIONAL REAL ESTATE HOLDING LLC
13			NPK LATIN AMERICA HOLDING LLC
14			NPK MINERAL GRINDING LLC
15			NPK PERSONNEL SERVICES LLC