| Name | Country | Market Cap (US$) |
|---|
| "OCULUS" Optikgeräte Gesellschaft mit beschränkter Haftung | Germany | Private |
| 3 D - Danish Diagnostic Development A/S | Denmark | Private |
| 3001, Inc. | United States | Private |
| 328 SUPPORT SERVICES GmbH | Germany | Private |
| 4 Flight Industries Inc | United States | Private |
| A & D Electronics (Shenzhen) Co., Ltd. | China | Private |
| A B A Industries Inc | United States | Private |
| A G C Incorporated | United States | Private |
| A-Med Systems, Inc. | United States | Private |
| A.C.N. 090 744 022 PTY LTD | Australia | Private |
| A.E. Petsche Company, Inc. | United States | Private |
| AAI Acquisition, Inc. | United States | Private |
| AAI Corporation | United States | Private |
| Aar International, Inc. | Netherlands | Private |
| ABBOTT DIABETES CARE LTD | United Kingdom | Private |
| Abbott Point Of Care Canada Limited | Canada | Private |
| Abu Dhabi Aircraft Technologies PJSC | United Arab Emirates | Private |
| Accellent Acquisition Corp | United States | Private |
| Accellent Holdings Corp | United States | Private |
| Accra Manufacturing Inc | United States | Private |
| ACINO AG | Germany | Private |
| ACMA Gesellschaft für flugzeuggestützte Trage- und Startanlagen | Germany | Private |
| Action Manufacturing Company Inc | United States | Private |
| Adac Laboratories Europe B.V. | Netherlands | Private |
| Adacel Inc | Canada | Private |
| Adam Aircraft Industries, Inc. | United States | Private |
| Adamovske strojirny a.s. | Czech Republic | Private |
| Adcole Corporation | United States | Private |
| ADI MUNITIONS PTY LIMITED | Australia | Private |
| ADMEDES Schuessler GmbH | Germany | Private |
| Admiralty Partners, Inc. | United States | Private |
| Adroit Medical Systems, Inc | United States | Private |
| Advanced Composite Structures, Llc | United States | Private |
| Advanced Interactive Systems | United States | Private |
| ADVANCED MATERIAL ENGINEERING PTE. LTD. | Singapore | Private |
| Advanced Precision, Inc. | United States | Private |
| Advanced Surgical Inc | United States | Private |
| AEGIS Defence Services Ltd | United Kingdom | Private |
| AERAZUR | France | Private |
| Aerea Spa | Italy | Private |
| AERNNOVA ANDALUCIA ESTRUCTURAS AERONAUTICAS S.A. | Spain | Private |
| Aero Kool Corporation | United States | Private |
| Aero Rotorblattfertigung GmbH | Germany | Private |
| Aero Simulation, Inc. | United States | Private |
| Aero Tec Laboratories, Inc. | United States | Private |
| Aero Technologies, LLC | United States | Private |
| Aero Union Corporation | United States | Private |
| Aero Vodochody A.S. | Czech Republic | Private |
| Aeroframe Services, Llc | United States | Private |
| Aerogroup, Inc. | United States | Private |
| Aerojet-General Corporation | United States | Private |
| Aeronautical Systems Inc | United States | Private |
| Aeronca Inc. | United States | Private |
| Aeroprecision Corporation | United States | Private |
| Aerospace Avionics Inc. | United States | Private |
| Aerospace Dynamics International, Inc | United States | Private |
| Aerospace Filtration Systems, Inc. | United States | Private |
| Aerospace Manufacturing Technologies Inc | United States | Private |
| Aerospatiale Matra Group | France | Private |
| Aerostructures Hamble Ltd | United Kingdom | Private |
| AEROTECH Peißenberg GmbH & Co. KG | Germany | Private |
| AeroThrust Corporation | United States | Private |
| AEROVISION AVIONICS, INC. | Taiwan | Private |
| Aesculap | France | Private |
| Aesculap Suhl GmbH | Germany | Private |
| AGEN BIOMEDICAL LIMITED | Australia | Private |
| Agusta Aerospace Corporation | United States | Private |
| AGUSTAWESTLAND HOLDINGS LTD | United Kingdom | Private |
| Air Cargo Carriers, Inc. | United States | Private |
| AIR COMMAND SYSTEMS INT | France | Private |
| Air Cruisers Company, Inc. | United States | Private |
| Air Industries Machining Corp | United States | Private |
| AIR LITTORAL INDUSTRIE | France | Private |
| Air Precision SA | France | Private |
| Air Products Medical GmbH | Germany | Private |
| Airbus Deutschland GmbH | Germany | Private |
| Airbus France | France | Private |
| AIRBUS MILITARY SL. | Spain | Private |
| Airbus North America Engineering, Inc. | United States | Private |
| Airbus North America Holdings, Inc. | United States | Private |
| AIRBUS OPERATIONS SL | Spain | Private |
| Aircal Inc | United States | Private |
| AIRCELLE | France | Private |
| AIRCELLE LTD | United Kingdom | Private |
| Aircraft Industries, a.s. | Czech Republic | Private |
| Aircraft Parts Corporation | United States | Private |
| Airfoil Textron Inc | United States | Private |
| Airlift International | United States | Private |
| Airservices Australia | Australia | Private |
| Airstar International, Inc | United States | Private |
| Airtech International Inc | United States | Private |
| AIZU OLYMPUS CORPORATION | Japan | Private |
| Akkumulyatornaya Kompaniya Rigel OAO | Russia | Private |
| AKOMA IKA KOGYO K.K. | Japan | Private |
| Aksioma-Servis ZA | Russia | Private |
| Aktsionernaya Kompaniya Omskagregat OAO | Russia | Private |
| Albrecht Kind GmbH | Germany | Private |
| Alcatel Espace S.A. | France | Private |
| Alcoa Industrial Components | United States | Private |
| Alcon Surgical Inc | United States | Private |
|
