Exhibit 21

Exhibit 21

L3HARRIS TECHNOLOGIES INC.

SUBSIDIARIES AS OF MARCH 1, 2021

(100% direct or indirect ownership by L3Harris Technologies, Inc., unless otherwise noted)

Name of Subsidiary						State or Other Jurisdiction of Incorporation
1231670 Ontario Inc.						Canada
AeroElite Limited						United Kingdom
Aerosim Academy, Inc.						Florida
Aerosim Bangkok Company Limited						Thailand
Aerosim Technologies, Inc.						Minnesota
Aerosim Thai Company Limited						Thailand
Airline Placement Limited						United Kingdom
Airline Recruitment Limited						United Kingdom
Applied Defense Solutions, Inc.						Delaware
Asia Flight Data Services Pte. Ltd.						Singapore
Asian Aviation Training Centre Ltd.						Thailand
ASV Global, L.L.C.						Louisiana
Autonomous Surface Vehicles Limited						United Kingdom
Autonomous Surface Vehicles, LLC						Louisiana
Aviation Communication & Surveillance Systems, LLC						Delaware
Azimuth Security Pty Ltd						Australia
Azimuth Security Trust						Australia
Azimuth Security, LLC						Florida
Beijing MAPPS-SERI Technology Company Ltd.*						China
Calzoni S.r.l.						Italy
Cancer Treatment Services International, Inc.*						Delaware
Combat Advanced Propulsion, LLC						Delaware
CR MSA LLC						Delaware
CTC Aviation Group Limited						United Kingdom
CTC Aviation Holdings Limited						United Kingdom
CTC Aviation International Limited						United Kingdom
CTC Aviation Services Limited						United Kingdom
CTC Aviation Training (UK) Limited.						United Kingdom
Defence Investments Limited						United Kingdom
DMRAC-Aviation Corporation - SGPS, Unipessoal LDA						Portugal
EAA – Escola de Aviação Aerocondor, S.A.						Portugal
Eagle Technology, LLC						Delaware
EDO (UK) Ltd.						United Kingdom
EDO MBM Technology Ltd.						United Kingdom
EDO Western Corporation						Utah
Electrodynamics, Inc.						Arizona
ESSCO Collins Limited						Ireland
Exelis Arctic Services						Delaware
Exelis Australia Holdings Pty Ltd						Australia
Exelis Australia Pty Ltd						Australia
Exelis Holdings, Inc.						Delaware
Exelis Luxembourg SARL						Luxembourg
FAST Holdings Limited*						United Kingdom

Exhibit 21

Name of Subsidiary						State or Other Jurisdiction of Incorporation
FAST Training Services Limited						United Kingdom
Felec Services, Inc.						Delaware
Flight Data Services Incorporated						Arizona
Flight Training Acquisitions LLC						Delaware
ForceX, Inc						Tennessee
G Air Advanced Training, Lda						Portugal
G Air II Maintenance, Lda						Portugal
G4U – Gestão de Activos Aeronáuticos, Sociedade, Lda						Portugal
Harris Asia Pacific Sdn. Bhd.						Malaysia
Harris Atlas Systems LLC*						UAE
Harris C4i Pty Ltd						Australia
Harris Canada Systems, Inc.						Canada
Harris Cayman Ltd.						Cayman Islands
Harris Communications (Australia) Pty. Ltd.						Australia
Harris Communications (Spain), S. L.						Spain
Harris Communications FZCO						UAE
Harris Communications GmbH						Germany
Harris Communications Limited						Hong Kong
Harris Communications Malaysia Sdn. Bhd.						Malaysia
Harris Communications MH Spain, S. L.						Spain
Harris Communications Pakistan (Private) Limited						Pakistan
Harris Communications Systems India Private Limited						India
Harris Comunicações e Participações do Brasil Ltda.						Brazil
Harris Defence Ltd.						United Kingdom
Harris Denmark ApS						Denmark
Harris Denmark Holding ApS						Denmark
Harris Geospatial Solutions B.V.						Netherlands
Harris Geospatial Solutions SARL						France
Harris Geospatial Solutions GmbH						Germany
Harris Geospatial Solutions Italia SRL						Italy
Harris Geospatial Solutions KK						Japan
Harris Geospatial Solutions UK Limited						United Kingdom
Harris Geospatial Solutions, Inc.						Colorado
Harris Global Communications, Inc.						New York
Harris Holdco LLC						Delaware
Harris International Chile Limitada						Chile
Harris International Holdings, LLC						Delaware
Harris International, Inc.						Afghanistan
Harris International, Inc.						Delaware
Harris International Saudi Communications						Saudi Arabia
Harris International Venezuela, C.A.						Venezuela
Harris Luxembourg Sarl						Luxembourg
Harris NV						Belgium
Harris Orthogon GmbH						Germany
Harris Pension Management Limited						United Kingdom
Harris Solid-State (Malaysia) Sdn. Bhd.						Malaysia
Harris Systems Limited						United Kingdom
Honeywell TCAS Inc.*						Delaware
Interstate Electronics Corporation						California
L-3 Afghanistan, LLC						Delaware

Exhibit 21

Name of Subsidiary						State or Other Jurisdiction of Incorporation
L3 Applied Technologies, Inc.						Delaware
L3 Australia Group Pty Ltd						Australia
L3 Aviation Products, Inc.						Delaware
L-3 Centaur, LLC						Delaware
L3 Cincinnati Electronics Corporation						Ohio
L3 Commercial Training Solutions Limited						United Kingdom
L-3 Communications Advanced Aviation, Inc.						Montana
L-3 Communications Advanced Aviation, LLC						Montana
L-3 Communications AIS GP Corporation						Delaware
L-3 Communications ASA Limited						United Kingdom
L-3 Communications Australia Pty Ltd						Australia
L-3 Communications Flight Capital LLC						Delaware
L-3 Communications Holding GmbH						Germany
L-3 Communications India Private Limited						India
L-3 Communications Integrated Systems L.P.						Delaware
L-3 Communications Investments Inc.						Delaware
L-3 Communications Link Simulation and Training UK (Overseas) Limited						United Kingdom
L3 CTS Airline Academy (NZ) Limited						New Zealand
L3 CTS Airline and Academy Training Limited						United Kingdom
L-3 Domestic Holdings, Inc.						Delaware
L3 Doss Aviation, Inc.						Texas
L3 Electron Devices, Inc.						Delaware
L3 ESSCO, Inc.						Delaware
L3 Foreign Holdings, Inc.						Delaware
L3 Fuzing and Ordnance Systems, Inc.						Delaware
L-3 Global Holding UK Ltd.						United Kingdom
L3 International Australia Pty Ltd						Australia
L-3 International UK Ltd						United Kingdom
L3 Investments UK Holdings Ltd						United Kingdom
L3 Investments, LLC						Delaware
L3 Kenya LTD						Kenya
L3 Kigre, Inc.						Ohio
L3 Latitude, LLC						Arizona
L3 Magnet-Motor GmbH						Germany
L3 MAPPS INC.						Canada
L3 MAPPS Limited						United Kingdom
L3 MAPPS Sdn. Bhd.						Malaysia
L3 Micreo Pty Limited						Australia
L3 Open Water Power, Inc.						Delaware
L-3 Saudi Arabia LLC						Saudi Arabia
L-3 Societá Srl.						Italy
L3 Technologies Canada Group Inc.						Canada
L3 Technologies Canada Inc.						Canada
L3 Technologies Investments Limited						Cyprus

Exhibit 21

Name of Subsidiary						State or Other Jurisdiction of Incorporation
L3 Technologies MAS Inc.						Canada
L3 Technologies, Inc.						Delaware
L-3 Technology & Services UK Ltd						United Kingdom
L3 Unidyne, Inc.						Delaware
L3 Unmanned Systems, Inc.						Texas
L3 Westwood Corporation						Nevada
L3Harris Technologies Australia Pty Ltd.						Australia
L3Harris Technologies Australia Group Pty Ltd						Australia
L3Harris Technologies BTC Holding, LLC						Delaware
L3Harris Technologies CMAS Holdings, LLC						Delaware
L3Haris Technologies CTS Holdings Limited						United Kingdom
L3Harris Technologies Holding, LLC						Delaware
L3Harris Technologies UK Holding Ltd						United Kingdom
L3Harris Technologies UK Limited						United Kingdom
L3Harris Technologies UK Topco Limited						United Kingdom
L3Harris Unlimited						United Kingdom
Linchpin Labs Inc.						Canada
Linchpin Labs Inc.						Delaware
Linchpin Labs Limited						United Kingdom
Linchpin Labs Limited						New Zealand
Linchpin Labs Pty Limited						Australia
L-Tres Comunicaciones Costa Rica, S.A.						Costa Rica
Manatee Investment, LLC						Delaware
Melbourne Leasing, LLC						Florida
Mission Systems Australia Pty Ltd						Australia
Mustang Technology Group, L.P.						Texas
Narda Safety Test Solutions GmbH						Germany
Narda Safety Test Solutions S.r.l.						Italy
NexGen Communications, LLC						Virginia
Power Paragon, Inc.						Delaware
Riptide Autonomous Solutions LLC						Delaware
S.C. Harris Assured Communications SRL						Romania
SARL Assured Communications						Algeria
Sovcan Star Satellite Communications Inc.						Canada
SPD Electrical Systems, Inc.						Delaware
Sunshine General Services, LLC						Iraq
TRL Electronics Limited						United Kingdom
TRL Technology Limited						United Kingdom
Wescam Inc.						Canada
Wescam USA, Inc.						Florida

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* Subsidiary of L3Harris Technologies, Inc. less than 100% directly or indirectly owned by L3Harris Technologies, Inc.