| Name | Country | Market Cap (US$) |
|---|
| The Memphis Group, Inc. | United States | Private |
| The NORDAM GROUP | United States | Private |
| The Renwick Group plc | United Kingdom | Private |
| The Troxel Company | United States | Private |
| Therm, Inc | United States | Private |
| Thermo Electron Oy | Finland | Private |
| Thermo Instruments Inc | Canada | Private |
| Thermo Lab Systems | United States | Private |
| Thermo Optek (UK) Ltd. | United Kingdom | Private |
| TherOx, Inc. | United States | Private |
| Thielert Aircraft Engines GmbH | Germany | Private |
| Thompson/Center Arms Company, Inc. | United States | Private |
| Thomson Marconi Sonar (TMS) | France | Private |
| Tianjin Hanaco Medical Co., Ltd. | China | Private |
| Tideland Signal Corporation | United States | Private |
| TIMCO Aviation Services | United States | Private |
| Tiodize Company, Inc. | United States | Private |
| Titleist Foot-Joy Worldwide | United States | Private |
| Tokyo Aircraft Instrument Co., Ltd. | Japan | Private |
| TOKYO GIKEN CO.,LTD. | Japan | Private |
| TOMEY CORPORATION | Japan | Private |
| Tommy Armour Golf Co. | United States | Private |
| TOPCON YAMAGATA.CO.,LTD. | Japan | Private |
| TORNIER SA | France | Private |
| TOSHIBA ELECTRO-WAVE COMPONENTS CO.,LTD. | Japan | Private |
| TOSOH HI-TEC, INC. | Japan | Private |
| TracerNET Corporation | United States | Private |
| Trak Communications Inc | United States | Private |
| Trak Microwave Corporation | United States | Private |
| TRANSASIA BIO-MEDICALS LIMITED | India | Private |
| Transcoject GmbH & Co KG | Germany | Private |
| TransDigm Inc | United States | Private |
| Transformational Space Corporation LLC | United States | Private |
| Trek Bicycle Corporation | United States | Private |
| Triangle Biomedical Sciences, Inc. | United States | Private |
| TRIDENT TURBOPROP (DUBLIN) LTD | Republic of Ireland | Private |
| Trilectron Industries | United States | Private |
| TRINITY BIOTECH MANUFACTURING LTD | Republic of Ireland | Private |
| Triumph Actuation Systems-Connecticut Llc | United States | Private |
| Triumph Composite Systems, Inc | United States | Private |
| Triumph Structures - Los Angeles, Inc. | United States | Private |
| Triumph Structures - Los Angeles, Inc. | United States | Private |
| Trivirix Denmark ApS Under Konkurs | Denmark | Private |
| TRIXELL | France | Private |
| Tru-Circle Aerospace Corporation | United States | Private |
| Tru-Circle Corporation | United States | Private |
| TRUMPF Medizin Systeme GmbH | Germany | Private |
| TRW (Avionics & Systems Division) | United States | Private |
| TRW (Space & Electronics Group) | United States | Private |
| TSS (International) Ltd. | United Kingdom | Private |
| Tunturipyörä Oy | Finland | Private |
| Turbine Engine Components Technologies Corporation | United States | Private |
| Turbo Combustor Technology, Inc | United States | Private |
| Turbomeca | France | Private |
| TURBOMECA AUSTRALASIA PTY. LIMITED | Australia | Private |
| Tusas Aerospace Industries Inc | Turkey | Private |
| TUSAS HAVACILIK VE UZAY SANAYII A S | Turkey | Private |
| TYCO HEALTHCARE | France | Private |
| TYCO HEALTHCARE (UK) MANUFACTURING LTD | United Kingdom | Private |
| Tyco Healthcare Deutschland GmbH | Germany | Private |
| TYUMENSKIY ZAVOD MEDITSINSKOGO OBORUDOVANIYA I INSTRUMENTOV PUBL | Russia | Private |
| U. S. S. C. Puerto Rico Inc | United States | Private |
| U.S. Repeating Arms Company | United States | Private |
| UBE MEDICAL CO.,LTD. | Japan | Private |
| Uca Holdings, Inc | United States | Private |
| ULAN-UDE AVIATION PLANT PUBLIC JOINT STOCK COMPANY | Russia | Private |
| Ulrich GmbH & Co. KG | Germany | Private |
| Ultra Electronics Defense Inc | United States | Private |
| Ultrasonic Technologies Ltd. | South Korea | Private |
| UMAREX Sportwaffen GmbH & Co. KG | Germany | Private |
| UNC, Incorporated | United States | Private |
| Unique Instruments, Inc. | United States | Private |
| Unison Industries Inc. | United States | Private |
| Unisys Deutschland GmbH | Germany | Private |
| United Aircraft Products Division | United States | Private |
| United Defense, L.P. | United States | Private |
| United Defense, L.P. (Ground Systems | United States | Private |
| United States Endoscopy Group, Inc | United States | Private |
| United Technologies (Sikorsky Unit) | United States | Private |
| Universal Propulsion Company Inc | United States | Private |
| Unomedical A/S | Denmark | Private |
| UpLink Corporation | United States | Private |
| Uromed Corporation | United States | Private |
| US Medical Instruments, Inc. | United States | Private |
| Valenite Inc. | United States | Private |
| van Halteren Metaal B.V. | Netherlands | Private |
| Van's Aircraft | United States | Private |
| Vanäsverken AB | Sweden | Private |
| Vance Products Inc | United States | Private |
| Vanzetti Systems, Inc. | United States | Private |
| Vari-Form Inc. | Canada | Private |
| Varian Australia Pty Ltd | Australia | Private |
| VARIAN MEDICAL SYSTEMS FRANCE | France | Private |
| Vascular Architects, Inc. | United States | Private |
| Velco ANS | Norway | Private |
| Velocys, Inc. | United States | Private |
| Verax Biomedical Incorporated | United States | Private |
| Vestergaard Company A/S | Denmark | Private |
| Viasys Respiratory Care, Inc | United States | Private |
| Vibrachoc S.A. | France | Private |
|
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