| Matt Breidert | Executive Officer | LONDON, X0 |
| -- ECOFIN NORTH AMERICAN GP LIMITED | Executive Officer | GRAND CAYMAN, E9 |
| Bernard Lambilliotte | Executive Officer | LONDON, X0 |
| -- ECOFIN LIMITED | Promoter | LONDON, X0 |
| Jean-Conrad Hottinger | Director | New York, NY |
| John Murray | Director | New York, NY |
| Martin Negre | Director | Grand Cayman, E9 |
| - Ecofin Advisors Limited | Promoter | London, X0 |
| -- Ecofin North American GP | Executive Officer | Grand Cayman, E9 |
| -- Ecofin North American GP | Promoter | Grand Cayman, E9 |
| - Tortoise Advisors UK | Promoter | London, X0 |
| -- Tortoise North American GP Limited | Executive Officer | Grand Cayman, E9 |
| -- Tortoise North American GP Limited | Promoter | Grand Cayman, E9 |
| - Tortoise Advisors UK Ltd | Promoter | London, X0 |
| -- Tortoise North American GP Ltd | Executive Officer | Grand Cayman, E9 |
| -- Tortoise North American GP Ltd | Promoter | Grand Cayman, E9 |
| - Ecofin Limited | Promoter | London, X0 |
| -- Ecofin North American General Partner Ltd | Executive Officer | Grand Cayman, E9 |
| -- Ecofin North American General Partner Ltd | Promoter | Grand Cayman, E9 |
| -- -- Ecofin Limited | Executive Officer | London, X0 |
| -- -- Ecofin Limited | Promoter | London, X0 |
| -- -- Ecofin North American General Partner Limited | Executive Officer | George Town, Grand Cayman, E9 |
| -- -- Ecofin North American General Partner Limited | Promoter | George Town, Grand Cayman, E9 |