INVESTMENT IN AMERICAN TRANSMISSION COMPANY

Due to the acquisition of Integrys on June 29, 2015, our ownership of ATC increased from 26.2% to approximately 60%. ATC is a for-profit, electric transmission company regulated by the FERC and certain state regulatory commissions. The following table shows changes to our investment in ATC:



	Three Months Ended March 31
(in millions)	2016		2015
Balance at beginning of period	$	1,380.9	$	424.1
Add: Earnings from equity method investment	38.5		16.1
Add: Capital contributions	9.0		1.3
Add: Adjustment to equity method goodwill	9.3		—
Less: Distributions received	15.1		10.4
Less: Other	0.1		—
Balance at end of period	$	1,422.5	$	431.1

We pay ATC for transmission and other related services it provides. In addition, we provide a variety of operational, maintenance, and project management work for ATC, which is reimbursed to us by ATC. We are required to pay the cost of needed transmission infrastructure upgrades for new generation projects while the projects are under construction. ATC reimburses us for these costs when the new generation is placed in service. The following table summarizes our significant related party transactions with ATC:



	Three Months Ended March 31
(in millions)	2016		2015
Charges to ATC for services and construction	$	4.1	$	2.5
Charges from ATC for network transmission services	100.8		59.6

Our balance sheets included the following receivables and payables related to ATC:



(in millions)	March 31, 2016		December 31, 2015
Accounts receivable
Services provided to ATC	$	2.0	$	1.0
Accounts payable
Services received from ATC	30.4		28.3

Summarized financial data for ATC is included in the following tables:



	Three Months Ended March 31
(in millions)	2016		2015
Income statement data
Revenues	$	164.2	$	152.4
Operating expenses	79.1		80.0
Other expense	24.0		24.4
Net income	$	61.1	$	48.0



(in millions)	March 31, 2016		December 31, 2015
Balance sheet data
Current assets	$	88.7	$	80.5
Noncurrent assets	4,022.1		3,948.3
Total assets	$	4,110.8	$	4,028.8

Current liabilities	$	337.8	$	330.3
Long-term debt	1,790.9		1,790.7
Other noncurrent liabilities	265.8		245.0
Shareholders' equity	1,716.3		1,662.8
Total liabilities and shareholders' equity	$	4,110.8	$	4,028.8