Subsidiaries | State of Incorporation/Formation |
| Macquarie Infrastructure Company Inc. | Delaware |
| (d/b/a Macquarie Infrastructure Company (US)) | |
| Macquarie Yorkshire LLC | Delaware |
| Communications Infrastructure LLC | Delaware |
| South East Water LLC | Delaware |
| Macquarie FBO Holdings LLC | Delaware |
| MIC European Financing Sarl | Luxembourg |
| Macquarie District Energy Holdings LLC (US) | Delaware |
| Macquarie Americas Parking Corporation (US) | Delaware |
| Atlantic Aviation FBO, Inc. | Delaware |
| Eagle Aviation Resources, Ltd. | Nevada |
| Macquarie Gas Holdings LLC | Delaware |
| Macquarie Terminal Holdings LLC | Delaware |
| Futura Natural Gas LLC | Delaware |
| Macquarie District Energy Inc. | Delaware |
| Macquarie Airports North America Inc. (US) | Delaware |
| Macquarie Aviation North America Inc. | Delaware |
| Macquarie Aviation North America 2 Inc. | Delaware |
| Trajen Holdings, Inc. | Delaware |
| Parking Company of America Airports Holdings, LLC | Delaware |
| PCAA Parent, LLC | Delaware |
| RCL Properties, LLC | Pennsylvania |
| PCAA Properties, LLC | Delaware |
| PCAA Oakland, LLC (f/k/a PCAA Chicago Holdings, LLC) | Delaware |
| Parking Company of America Airports, LLC | Delaware |
| PCAA GP, LLC | Delaware |
| PCAA LP, LLC | Delaware |
| PCA Airports, Ltd. | Texas |
| Parking Company of America Airports Phoenix, LLC | Delaware |
| PCAA Chicago, LLC | Delaware |
| Airport Parking Management Inc. | Delaware |
| PCAA Missouri, LLC | Delaware |
| PCAA SP, LLC | Delaware |
| PCAA SP-OK, LLC | Delaware |
| Seacoast Holdings (PCAAH), Inc. | Delaware |
| Macquarie HGC Investment LLC | Hawaii |
| HGC Investment Corporation | Delaware |
| HGC Holdings LLC | Hawaii |
| The Gas Company LLC | Hawaii |
| Connect M1 A1 Holdings Limited (UK) | |
| Connect M1 A1 Limited (UK) | United Kingdom |
| Thermal Chicago Corporation | Delaware |
| MDE Thermal Technologies Inc. | Illinois |
| Northwind Chicago LLC | Delaware |
| ETT National Power, Inc. | Illinois |
| Northwind Midway LLC | Delaware |
| ETT Nevada, Inc. | Nevada |
| Northwind Aladdin LLC | Nevada |
| ILG Avcenter, Inc. | Delaware |
| BTV Avcenter, Inc. | Delaware |
| Atlantic Aviation Holding Corporation | Delaware |
| Atlantic Aviation Corporation | Delaware |
| Atlantic Aviation Flight Support, Inc. | Delaware |
| Bridgeport Airport Services, Inc | Connecticut |
| Atlantic Aviation Philadelphia, Inc. | Delaware |
| COAI Holdings, LLC | Delaware |
| Charter Oak Aviation, Inc. | Connecticut |
| BASI Holdings, LLC | Delaware |
Subsidiaries | State of Incorporation/Formation |
| Brainard Airport Services, Inc | Connecticut |
| AAC Subsidiary, LLC | Delaware |
| Executive Air Support, Inc | Delaware |
| Flightways of Long Island Inc. | New York |
| (d/b/a Million Air) | |
| FLI Subsidiary, LLC | Delaware |
| General Aviation, LLC | Louisiana |
| General Aviation of New Orleans, LLC | Louisiana |
| General Aviation Holdings LLC | Delaware |
| Newport FBO Two, LLC | Delaware |
| Palm Springs FBO Two, LLC | Delaware |
| Trajen Funding, Inc. | Delaware |
| Trajen Limited, LLC | Delaware |
| Trajen FBO, LLC | Delaware |
| Trajen Flight Support, LP | Delaware |
| Waukesha Flying Services, Inc. | Wisconsin |
| Sierra Aviation, Inc. | Oklahoma |
| Atlantic SMO Holdings LLC | Delaware |
| Atlantic SMO GP LLC | Delaware |
| ProAir Aviation Maintenance, LLC | Delaware |
