Exhibit 21 | |||||
| Affiliates and Subsidiaries of Integrys Energy Group, Inc. December 31, 2012 | |||||
INTEGRYS ENERGY GROUP, INC. (1) (2) | |||||
Wisconsin Public Service Corporation (2) | |||||
WPS Leasing, Inc. (2) | |||||
Wisconsin Valley Improvement Company (27.1% ownership) (2) | |||||
Wisconsin River Power Company (50% ownership) (2) | |||||
WPS Investments, LLC (approximately 11.7% ownership) (2) | |||||
American Transmission Company LLC (approximately 34.07% ownership) (2) | |||||
ATC Management Inc. (32.16% ownership of Class A Shares) (2) | |||||
WPS Investments, LLC (approximately 85.81% ownership) (2) | |||||
American Transmission Company LLC (approximately 34.07% ownership) (2) | |||||
Michigan Gas Utilities Corporation (3) | |||||
Minnesota Energy Resources Corporation (3) | |||||
Integrys Business Support, LLC (3) | |||||
Peoples Energy, LLC (4) | |||||
The Peoples Gas Light and Coke Company (4) | |||||
Peoples Gas Neighborhood Development Corporation (4) | |||||
North Shore Gas Company (4) | |||||
Peoples Energy Ventures, LLC (3) | |||||
Peoples Energy Neighborhood Development, LLC (3) | |||||
Peoples Technology, LLC (3) | |||||
Integrys Transportation Fuels, LLC (3) | |||||
Pinnacle CNG Company (5) | |||||
Pinnacle CNG Systems, LLC (5) | |||||
Trillium USA Company (3) | |||||
Trillium USA, LLC (3) | |||||
Integrys PTI CNG Fuels, LLC (50% ownership) (3) | |||||
AMP Trillium, LLC (30% ownership) (3) | |||||
Upper Peninsula Power Company (6) | |||||
WPS Investments, LLC (approximately 2.49% ownership) (2) | |||||
American Transmission Company LLC (approximately 34.07% ownership) (2) | |||||
ATC Management Inc. (1.91% ownership of Class A Shares) (2) | |||||
Integrys Energy Services, Inc. (2) | |||||
Integrys Energy Services – Natural Gas, LLC (3) | |||||
Integrys Energy Services – Electric, LLC (3) | |||||
Quest Energy, L.L.C. (6) | |||||
| Integrys Energy Services of Canada Corp. (formed under Canadian law) | |||||
Integrys Energy Services of New York, Inc. (7) | |||||
PERC Holdings, LLC (3) | |||||
Solar Hold 2008-1, LLC (1% ownership) (3) | |||||
| Affiliates and Subsidiaries of Integrys Energy Group, Inc. December 31, 2012 | ||||
Integrys Energy Services, Inc. continued | ||||
WPS Power Development, LLC (2) | ||||
PDI Stoneman, Inc. (2) | ||||
Winnebago Energy Center LLC (3) | ||||
Wisconsin Woodgas LLC (2) | ||||
Wisconsin Energy Operations LLC (49% ownership) (2) | ||||
ECO Coal Pelletization #12 LLC (3) | ||||
Sunbury Holdings, LLC (3) | ||||
WPS Empire State, Inc. (7) | ||||
WPS Beaver Falls Generation, LLC (3) | ||||
WPS Syracuse Generation, LLC (3) | ||||
Combined Locks Energy Center, LLC (2) | ||||
Solar Hold 2008-1, LLC (99% ownership) (3) | ||||
Soltage-MAZ 700 Tinton Falls, LLC (99% ownership) (3) | ||||
Soltage-ADC 630 Jamesburg, LLC (99% ownership) (3) | ||||
Soltage-PLG 500 Millford, LLC (99% ownership) (3) | ||||
Integrys Solar, LLC (3) | ||||
INDU Solar Holdings, LLC (50% ownership) (3) | ||||
Sun Devil Solar LLC (3) | ||||
Gilbert Solar Facility I, LLC (3) | ||||
Solar Star California II, LLC (3) | ||||
Integrys NJ Solar, LLC (3) | ||||
Solar Star New Jersey VI, LLC (3) | ||||
Crimson Solar, LLC (3) | ||||
Camden Solar Center, LLC (8) | ||||
Hemlock Solar, LLC (3) | ||||
LGS Renewables I, LC (5) | ||||
WPS Visions, Inc. (2) | ||||
Penvest, Inc. (6) | ||||
(1) | Integrys Energy Group, Inc. is the parent holding company. All affiliated companies listed are 100% owned except as noted otherwise. | |||
(2) | Formed under Wisconsin law. | |||
(3) | Formed under Delaware law. | |||
(4) | Formed under Illinois law. | |||
(5) | Formed under Texas law. | |||
(6) | Formed under Michigan law. | |||
(7) | Formed under New York law. | |||
(8) | Formed under New Jersey law. | |||