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| Subsidiaries | State Incorporated | |
| Eastern Shore Natural Gas Company | Delaware | |
| Sharp Energy, Inc. | Delaware | |
| Chesapeake Service Company | Delaware | |
| Chesapeake OnSight Services LLC | Delaware | |
| Peninsula Energy Services Company, Inc. | Delaware | |
| Peninsula Pipeline Company, Inc. | Delaware | |
| Florida Public Utilities Company | Florida | |
| Sandpiper Energy, Inc. | Delaware | |
| Aspire Energy of Ohio, LLC | Delaware | |
| Aspire Energy Express, LLC | Delaware | |
| Marlin Gas Services, LLC | Delaware | |
| Chesapeake Utilities of Maryland, Inc. | Maryland | |
| OnSight Renewables, LLC | Delaware | |
| Chesapeake Emergency Energy Recipient Program, Inc. | Delaware | |
| CUC Shared Services, Inc. | Delaware | |
| Pivotal Utility Holdings, Inc. | New Jersey | |
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| Subsidiary of Sharp Energy, Inc. | State Incorporated | |
| Sharpgas, Inc. | Delaware | |
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| Subsidiary of Florida Public Utilities Company | State Incorporated | |
| Flo-Gas Corporation | Florida | |
| FPU Renewables, LLC | Delaware | |
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| Subsidiaries of Chesapeake Service Company | State Incorporated | |
| Skipjack, Inc. | Delaware | |
| Chesapeake Investment Company | Delaware | |
| Eastern Shore Real Estate, Inc. | Delaware | |
| | |
| Subsidiaries of Chesapeake OnSight Services LLC | State Incorporated | |
| Eight Flags Energy, LLC | Delaware | |
| Amelia Island Energy, LLC | Delaware | |
| | |
| Subsidiaries of OnSight Renewables, LLC | State Incorporated | |
| Amelia Renewables, LLC | Delaware | |
| Blue Peake LNG, LLC | Delaware | |
| Marlin Compression, LLC | Delaware | |
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| Subsidiary of Eastern Shore Natural Gas Company | State Incorporated | |
| Planet Found Energy Development, LLC | Maryland | |
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