Exhibit 21

List of Subsidiaries of Booz Allen Hamilton Holding Corporation
as of May 22, 2026

Name
Jurisdiction of Organization
Booz Allen Commercial Cyber (SG), Pte. Ltd.
Singapore
Booz Allen Commercial Cyber (UK), Ltd.
United Kingdom
Booz Allen Commercial Cyber Holdings, LLC
Delaware
Booz Allen Commercial Cyber, LLC
Delaware
Booz Allen Cyber Solutions, LLC
Delaware
Booz Allen Hamilton (Dubai) Limited
United Arab Emirates
Booz Allen Hamilton (Ireland) Limited
Ireland
Booz Allen Hamilton Australia PTY LTD
Australia
Booz Allen Hamilton Bahrain W.L.L.
Bahrain
Booz Allen Hamilton Consulting Pte. Ltd.
Singapore
Booz Allen Hamilton Egypt, LLC
Egypt
Booz Allen Hamilton Engineering Holding Co., LLC
Delaware
Booz Allen Hamilton Engineering Services, LLC
Delaware
Booz Allen Hamilton Germany GmbH
Germany
Booz Allen Hamilton Inc.
Delaware
Booz Allen Hamilton Intellectual Property Holdings, LLC
Delaware
Booz Allen Hamilton International (U.K.) Ltd.
United Kingdom
Booz Allen Hamilton International Pte. Ltd.
Singapore
Booz Allen Hamilton International, Inc.
Delaware
Booz Allen Hamilton Investor Corporation
Delaware
Booz Allen Hamilton Japan G.K.
Japan
Booz Allen Hamilton Lebanon S.a.r.l.
Lebanon
Booz Allen Hamilton Netherlands B.V.
Netherlands
Booz Allen Hamilton Philippines Inc.
Philippines
Booz Allen Hamilton Saudi
Saudi Arabia
Booz Allen Hamilton Singapore Holding Company Pte. Ltd.
Singapore
Booz Allen Hamilton Singapore LLP
Singapore
Booz Allen Hamilton Tanzania Limited
Tanzania
Booz Allen Ventures, LLC
Delaware
PT Booz Allen Hamilton Indonesia
Indonesia
EverWatch Solutions Inc.
Maryland
Aquilent, Inc.
Delaware
BrainTrust Holdings, LLC
Maryland
Cloud Solutions Group, Inc.
Delaware
DataPoint Services, LLC
Delaware
eGov Holdings, Inc.
Delaware
Epic Acquisition Software, Inc.
Delaware
Epidemico, Inc.
Delaware
EverWatch Corp.
Delaware
HELworks, LLC
Delaware
Ian, Evan & Alexander Corporation
Colorado
Liberty IT Solutions, LLC
Delaware




Exhibit 21
Morphick, Inc.
Delaware
Nextgen-H Integration Services, LLC
Delaware
Northwood Global Solutions, LLC
Virginia
PAR Government Systems Corporation
New York
RAI Government Services LLC
Virginia
Riverside Engineering, LLC
Delaware
Shore Systems and Solutions, LLC
Delaware
ThunderYard Liberty JV LLC
Delaware
Thunderyard Liberty JV II LLC
Delaware
ThunderYard Solutions LLC
Delaware
Tracepoint Holdings, LLC
Delaware
Tracepoint LLC
Delaware
Warrior Technology LLC
Delaware
Sagewatch, LLC
Delaware
EagleTrust JV, LLC
Maryland
InTrust JV, LLC
Maryland
Drift Acquisition, Inc.
Delaware
DeFY Security LLC
Delaware