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