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10-K/A primary document
OIS · Amended Annual Report (Form 10-K/A) · Filed March 26, 2026

Oil States International Inc10-K/A exhibit

ois_20251231xex21110-ka.htm
Document

EXHIBIT 21.1
OIL STATES INTERNATIONAL, INC.
SUBSIDIARIES

SUBSIDIARYSTATE/COUNTRY
GEODynamics, Inc.Delaware
GEODynamics (U.K.) LimitedUnited Kingdom
Oil States Energy Services (Canada) Inc.Alberta, Canada
Oil States Energy Services Holding, LLC.
Delaware
Oil States Energy Services L.L.C.Delaware
OIS Cyprus LimitedCyprus
Oil States Industries, Inc.Delaware
Oil States Industries (Asia) Pte Ltd.Singapore
Oil States Industries do Brasil - Instalacoes Maritimas LtdaBrazil
Oil States Industries 1 B.V.Netherlands
Oil States Industries (India) Private LimitedIndia
Oil States Industries Singapore Holdco B.V.Netherlands
Oil States Industries US, Inc.Delaware
Oil States Industries (UK) LimitedUnited Kingdom
Oil States Management Inc.Delaware
Oil States Industries (Thailand) Ltd.Thailand
Oil States Skagit SMATCO L.L.C.Delaware
OSES International, LLCDelaware
Tempress Technologies, Inc.Washington

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