EX-21 5 a12-29627_1ex21.htm EX-21



			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.