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Exhibit 21.1

Cactus, Inc.

Significant Subsidiaries

 as of December 31, 2025

						State or Country
Subsidiary						of Incorporation
Cactus Acquisitions LLC						Delaware
Cactus Companies, LLC						Delaware
Cactus Wellhead, LLC						Delaware
Cactus Wellhead (Suzhou) Pressure Control Co., Ltd.						China
Cactus Wellhead Australia Pty, Ltd						Australia
Cactus Wellhead International I, LLC						Delaware
Cactus Wellhead Vietnam Limited Company						Vietnam
FlexSteel Holdings, LLC						Delaware
FlexSteel USA, LLC						Nevada
Rubiales Consulting, LLC						Delaware
Talon Bridge Holdings, LLC						Delaware
FlexSteel Pipeline Technologies, Ltd.						Canada