| United Technologies Corporation | Exhibit 21 |
| Subsidiary and Affiliate Listing | |
| December 31, 2015 | |
| Entity Name | Place of Incorporation |
| 3234808 Nova Scotia Limited | Nova Scotia |
| Allyn Holdings, Inc. | Delaware |
| Arabian Air Conditioning Company | Saudi Arabia |
| Augusta (Gibraltar) Holdings I Limited | Gibraltar |
| Augusta (Gibraltar) Holdings II S.C.S. | Grand-Duchy of Luxembourg |
| Auxiliary Power International Corporation | Delaware |
| Beesail Limited | England |
| Belgium Parkview BVBA | Belgium |
| Berkeley Luxembourg S.à r.l. | Grand-Duchy of Luxembourg |
| Blades Technology International, Inc. | Delaware |
| Blades Technology Ltd. | Israel |
| Bridgecam (Ireland) Limited | Ireland |
| Cambridge Luxembourg S.à r.l. | Grand-Duchy of Luxembourg |
| Caricor Ltd. | Delaware |
| Carrier Asia Limited | Hong Kong |
| Carrier Commercial Refrigeration, Inc. | Delaware |
| Carrier Corporation | Delaware |
| Carrier Enterprise, LLC | Delaware |
| Carrier HVACR Investments B.V. | Netherlands |
| Carrier Technologies ULC | Alberta |
| Ceesail Limited | England |
| Chubb Fire & Security Limited | England |
| Chubb Fire & Security Pty Ltd | Australia |
| Chubb Fire Limited | England |
| Chubb Group Limited | England |
| Chubb Group Security Limited | England |
| Chubb International (Netherlands) BV | Netherlands |
| Chubb International Holdings Limited | England |
| Chubb Limited | England |
| Chubb Nederland B.V. | Netherlands |
| Chubb Security Holdings Australia Pty Ltd | Australia |
| Chubb Systems Limited | United Kingdom |
| Commonwealth Luxembourg Holdings S.à r.l. | Grand-Duchy of Luxembourg |
| CTU of Delaware (formerly Mostek) | Delaware |
| Delavan Inc. | Delaware |
| Detector Electronics Corporation | Minnesota |
| Devonshire Switzerland Holdings GmbH | Switzerland |
| Elevadores Otis Ltda. | Brazil |
| Empresas Carrier, S. De R.L. De C.V. | Mexico |
| Fyrnetics (Hong Kong) Limited | Hong Kong |
| United Technologies Corporation | |
| Subsidiary and Affiliate Listing | |
| December 31, 2015 | |
| Entity Name | Place of Incorporation |
| Goodrich Aerospace Canada Ltd | Ontario |
| Goodrich Aftermarket Services Limited | United Kingdom |
| Goodrich Control Systems Ltd | Ontario |
| Goodrich Corporation | New York |
| Goodrich Inertial Limited | United Kingdom |
| Goodrich Landing Gear, LLC | Delaware |
| Goodrich Limited | United Kingdom |
| Goodrich Pump & Engine Control Systems, Inc. | Delaware |
| Goodrich Systems Limited | United Kingdom |
| Goodrich XCH Luxembourg B.V./S.a.r.l. | Netherlands |
| Gulf Security Technology Company Limited | China |
| Hamilton Sundstrand Aviation Services, Inc. | Delaware |
| Hamilton Sundstrand Corporation | Delaware |
| Hamilton Sundstrand Holdings, Inc. | Delaware |
| Hamilton Sundstrand International Holdings (Luxembourg) S.à r.l. | Grand-Duchy of Luxembourg |
| HEJ Holding, Inc. | Delaware |
| IAE International Aero Engines AG | Switzerland |
| JMS I Corporation | Delaware |
| Kidde Fire Protection Inc. | Delaware |
| Kidde Graviner Limited | England |
| Kidde Holdings Limited | England |
| Kidde International Limited | England |
| Kidde Products Limited | England |
| Kidde Technologies Inc.* | Delaware |
| Kidde UK | England |
| Kidde US Holdings Inc. | Delaware |
| KNA Inc. | Delaware |
| Latin American Holding, Inc. | Delaware |
| Netherlands Parkview Coöperatief U.A. | Netherlands |
| Nippon Otis Elevator Company | Japan |
| Noresco, LLC | Delaware |
| NSI, Inc. | Delaware |
| Otis Elevator (China) Company Limited | China |
| Otis Elevator (China) Investment Company Limited | China |
| Otis Elevator Company | New Jersey |
| Otis Elevator Company (India) Limited | India |
| Otis Elevator Korea | Korea, Republic of |
| Otis Far East Holdings Limited | Hong Kong |
| Otis Holdings GmbH & Co. OHG | Germany |
| Otis International Holdings GmbH | Germany |
| United Technologies Corporation | |
| Subsidiary and Affiliate Listing | |
| December 31, 2015 | |
| Entity Name | Place of Incorporation |
| Otis Investments Limited | England |
| Otis Limited | England |
| Otis Pacific Holdings B.V. | Netherlands |
| Otis S.C.S. | France |
| Parkview Participations LLC | Delaware |
| Parkview Treasury Services (UK) Limited | United Kingdom |
| Pratt & Whitney Aero Engines International GmbH | Switzerland |
| Pratt & Whitney Aero Engines International Services GmbH | Switzerland |
| Pratt & Whitney Canada Corp. | Nova Scotia |
| Pratt & Whitney Canada Holdings Ltd. | Nova Scotia |
| Pratt & Whitney Canada Leasing, Limited Partnership | Québec |
| Pratt & Whitney Component Solutions, Inc. | Michigan |
| Pratt & Whitney Compressor Airfoil Holdings, Inc. | Delaware |
| Pratt & Whitney Engine Leasing, LLC | Delaware |
| Pratt & Whitney Holdings LLC | Cayman Islands |
| Pratt & Whitney Rzeszow S.A. | Poland |
| Pratt Aero Limited Partnership | Nova Scotia |
| Ratier-Figeac, SAS | France |
| Rohr, Inc. | Delaware |
| Rosemount Aerospace Inc. | Delaware |
| Sensitech Inc. | Delaware |
| SICLI Holding SAS | France |
| Simmonds Precision Products, Inc. | New York |
| Sirius (Korea) Limited | England |
| South American Coöperatief U.A. | Netherlands |
| Trenton Luxembourg S.à r.l. | Grand-Duchy of Luxembourg |
| Trumbull Holdings SCS | France |
| United Technologies Australia Holdings Limited | Australia |
| United Technologies Canada, Ltd. | New Brunswick |
| United Technologies Corporation [DE] | Delaware |
| United Technologies Cortran, Inc. | Delaware |
| United Technologies Electronic Controls, Inc. | Delaware |
| United Technologies Far East Limited | Hong Kong |
| United Technologies Finance (U.K.) Limited | England |
| United Technologies France SAS | France |
| United Technologies Holding GmbH | Germany |
| United Technologies Holdings Italy Srl | Italy |
| United Technologies Holdings Limited | England |
| United Technologies Holdings SAS | France |
| United Technologies Intercompany Lending Ireland Limited | Ireland |
| United Technologies Corporation | |
| Subsidiary and Affiliate Listing | |
| December 31, 2015 | |
| Entity Name | Place of Incorporation |
| United Technologies International Corporation | Delaware |
| United Technologies International Corporation-Asia Private Limited | Singapore |
| United Technologies International SAS | France |
| United Technologies Luxembourg S.à r.l. | Grand-Duchy of Luxembourg |
| United Technologies Paris SNC | France |
| United Technologies South Asia Pacific Pte. Ltd | Singapore |
| UT Finance Corporation | Delaware |
| UT Luxembourg Holding II S.à r.l. | Grand-Duchy of Luxembourg |
| UT Park View, Inc. | Delaware |
| UTC (US) LLC | Delaware |
| UTC Canada Corporation | New Brunswick |
| UTC Corporation | Delaware |
| UTC Fire & Security Americas Corporation, Inc. | Delaware |
| UTC Fire & Security Corporation | Delaware |
| UTC Fire & Security Luxembourg S.a r.l. | Grand-Duchy of Luxembourg |
| UTC Investments Australia Pty Limited | Australia |
| UTCL Holdings, Limited | New Brunswick |
| UTCL Investments B.V. | Netherlands |
| UTX Holdings S.C.S. | France |
| Walter Kidde Portable Equipment Inc. | Delaware |
| Xizi Otis Elevator Company Limited | China |
| Zardoya Otis, S.A. | Spain |
* Kidde Technologies Inc. also conducts business as Kidde Aerospace & Defense, Fenwal Safety Systems and Kidde Dual Spectrum.
Other subsidiaries of the Registrant have been omitted from this listing since, considered in the aggregate as a single subsidiary, they would not constitute a significant subsidiary, as defined by Rule 1-02 of Regulation S-K.